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    • 专利摘要:
    pump configuration this is a magnetic drive coupling pump configuration that includes a clamping/separating mechanism that allows for simple and reliable positioning and provides clamping. propulsion direction positioning and radial direction positioning are achieved, respectively, by surface contact of a convex portion of a pump unit (10) inserted to a predetermined position in a concave portion (31) of a pump motor unit actuation (30), and by contact between an outer circumferential surface of the convex portion (11) and an inner circumferential surface of the concave portion (31). a gripper (15) projecting onto the outer circumferential surface of the pump unit (10), an engaging portion (32) projecting upwardly from an upper outer circumferential portion of the drive motor unit (30) to restrict, by engagement, an upward movement of the gripper when the pump unit (10) is rotated with the convex portion (11) inserted to the predetermined position in the concave portion (31), and a locking mechanism (50) which maintains the pump unit (10) in a gripper engaging position (15) and the engaging portion (32) are included.
    公开号:BR112013006692B1
    申请号:R112013006692-0
    申请日:2012-02-08
    公开日:2021-07-13
    发明作者:Hideo Hoshi；Syogo NAKASHIMA；Tatsuya Hidaka；Yasuharu Yamamoto；Takeshi Okubo
    申请人:Nipro Corporation；
    IPC主号:
    专利说明:

    FIELD OF TECHNIQUE
    [001] The present invention relates to a magnetic drive pump configuration that can be divided into a pump unit and a motor drive unit, and more particularly to a mounted coupling pump configuration inserting a pump unit in which an impeller is supported by a non-contact bearing in a drive motor unit. TECHNICAL BACKGROUND
    [002] Conventionally, a magnetic drive pump configuration is known that applies pressure on liquid by rotating an impeller by magnetic force.
    [003] With such a magnetic drive pump configuration, an impeller having an internal magnet (a driven magnet) is accommodated in a pump unit, and is rotatably supported by a non-contact bearing, such as a bearing magnetic or a hydrodynamic bearing. Likewise, the impeller accommodated in the pump unit is not driven by a shaft coupled to a drive motor, but is indirectly driven while separated from a drive source, by the use of magnetic force (magnet attraction force).
    [004] Correspondingly, a drive motor unit that accommodates an external magnet (a drive magnet) that rotates together with a drive motor is configured separately from the pump unit that accommodates the impeller to which the internal magnet, which must be attracted to the external magnet, it is fixed. That is, the pump unit and the drive motor unit described above have separate casings, providing a pump configuration according to which a coupling portion, such as a drive shaft, for example, does not is present in a drive mechanism to transmit power to turn the impeller.
    [005] Adopting the magnetic drive described above, a mounting configuration is obtained where the pump unit is inserted into a concave portion of the drive motor unit and the two are integrated by a screw or by a mechanical obstacle, and this built-in configuration is referred to as a coupling pump configuration. In this case, the external magnet is provided to a concave casing formed over the drive motor unit, and the internal magnet is provided to a convex casing formed over the pump unit.
    [006] Additionally, the magnetic force in the attraction direction of the pump unit on the drive motor unit acts between the pump unit and the drive motor unit.
    [007] Additionally, PTL 1 mentioned below describes a blood pump which can be separated into a pump chamber and a magnet sheath chamber so as to allow incineration of the pump chamber to thereby produce almost no ash. In this case, when a rotating body and a drive shaft in the magnet housing chamber are rotated, since the drive shaft is coupled to a rotating shaft by a joint, an impeller rotates together with the drive shaft and the rotary shaft. That is, according to the pump configuration described in PTL 1, an impeller inside the pump chamber is coupled to a drive unit inside the magnet housing chamber by a shaft. QUOTE LIST Patent Literature
    [008] PTL 1
    [009] Japanese Unexamined Patent Application Publication No. 2001-90687 SUMMARY OF THE INVENTION Technique Problem
    [010] Now, with the magnetic drive coupling pump configuration described above, since the pump unit and the drive motor unit are integrated by a screw or by a mechanical obstacle and magnetic force, the pump unit being used may unintentionally fall off the motor drive unit. That is, with a conventional built-in configuration, there is a problem that reliability is low.
    [011] In addition, depending on the use of the pump, the magnetic drive coupling pump configuration described above is required to allow the pump unit to be immediately attached to the drive motor unit and to become usable. Correspondingly, a pump configuration is desired that allows a pump unit to be reliably and precisely attached to a drive motor unit even when the pump unit is quickly attached.
    [012] Likewise, with a conventional configuration where integration is achieved by a screw or by a mechanical obstacle and magnetic force, the positional relationship between the pump unit and the drive motor unit is not constant and not - reliable in accuracy, thus leading to a problem in pump properties (rotational prediction of an impeller), hydrodynamic levitation performance and magnetic levitation performance of the impeller, and durability in case of using a pivot bearing for withstand the rotation of the impeller.
    [013] In view of the foregoing, a fixing/separating mechanism is desired, in relation to the magnetic drive coupling pump configuration, according to which a pump unit and a motor unit of drives are integrated, and simple and reliable positioning and fastening are enabled.
    [014] The present invention is conceived in view of the above circumstances, and its objective is to provide a magnetic drive coupling pump configuration that includes a fixing / separation mechanism that allows a simple and reliable positioning and fixing. Solution to Problem
    [015] The present invention provides the following solutions to solve the aforementioned problems.
    [016] A pump configuration according to the present invention consists of a magnetic drive pump configuration that is a type of coupling that inserts a convex portion provided in a bottom surface of a pump unit into a concave portion provided in a top surface of a drive motor unit to obtain an integration, and according to which magnetic force generated between a driven magnet attached to an impeller rotating by a non-contact bearing inside the pump unit, and a drive magnet which rotates by a motor within the drive motor unit rotates the impeller and applies pressure on the liquid, whereby positioning in a driving direction is achieved by the bottom surface of the pump unit and by a surface. tops of the drive motor unit which are in surface contact with each other in a state where the convex portion is inserted to a predetermined position in the concave portion, and the positioning in a radial direction is achieved by a contact between an outer circumferential surface of the convex portion and an inner circumferential surface of the concave portion, and the pump configuration including a plurality of tweezers provided protrudingly on the outer circumferential surface of the pump unit, a plurality of engaging portions provided upwardly and in a protruding manner from an upper outer circumferential portion of the drive motor unit to restrict upward movement of the tongs engaging when the pump unit is rotated. a state where the convex portion is inserted to a predetermined position in the concave portion, and a locking mechanism which serves to keep the pump unit in a position of engaging the tongs and the engaging portions.
    [017] According to a pump configuration of the present invention, the positioning in the direction of propulsion is achieved by the bottom surface of the pump unit and the top surface of the drive motor unit that are in surface contact between itself in a state where the convex portion is inserted to a predetermined position in the concave portion, and positioning in the radial direction is achieved by a contact between the outer circumferential surface of the convex portion and the inner circumferential surface of the concave portion, and a a plurality of tongs protruding from the outer circumferential surface of the pump unit, a plurality of engaging portions provided upwardly and in a protruding manner from the upper outer circumferential portion of the drive motor unit to restrict movement up of the calipers engaging when the pump unit is rotated into a state where the portion contains Vexa is inserted to a predetermined position in the concave portion, and the locking mechanism which serves to keep the pump unit in a position of engaging the tongs and the engaging portions are included. Therefore, if a pump unit rotation assembly operation after inserting the convex portion of the pump unit into the concave portion of the drive motor unit is performed, the upward movement of the pump unit is restricted by the engagement of the tongs and the portions. of engagement, and is held in engagement position by the locking mechanism. As a result, a reliable and fast positioning and fastening of the pump unit in relation to a predetermined position of the drive motor unit is allowed by a simple assembly operation of inserting the convex portion of the pump unit into the concave portion of the unit. of drive motor and rotate.
    [018] In the invention described above, the locking mechanism preferably includes an engagement protrusion member having a guide engagement surface formed on an outer circumferential edge surface that projects outwardly from the pump unit , and starts as an inclined surface whose degree of protrusion increases in an opposite direction from an attachment rotation direction being a step, and a movable arm having an arm main body that is supported, around a portion intermediate, on an outer circumferential surface of the drive motor unit and which is swivelable in a radial pump direction in a vertical plane, an elastic member which orients inwardly of an upper end portion of the main arm body in the radial direction of pump, a concave portion which is provided in the upper end portion of the main arm body and which engages with the engagement protrusion member, and a p. guide net that causes the main body of the arm to swing into contact with the inclined surface and that applies a mechanical obstacle on the pump unit by engaging the step.
    [019] With the pump configuration including such a locking mechanism, the arm main body whose guide wall is in contact with the inclined surface will have the guide wall pushed out along the inclined surface when the pump unit whose convex portion is inserted into the concave portion of the drive motor unit is rotated in the clamping rotation direction. As a result, the movable arm overcomes the orientation of the elastic member and opens outwards in a vertical plane, and when the guide wall passes the sloping surface and reaches the step, the movable arm is closed inwards by the orientation of the elastic member.
    [020] With the rotational operation of the pump unit and the mobile arm operation described above, the locking mechanism reaches a mechanical obstacle, in the engagement position of the tongs and the engagement portions, by the engagement of the step of the mobile arm supported on the side of the drive motor unit and guide wall formed on the protrusion member of the pump unit side, and enters a locked state when the pump unit is held in a pre-terminated mounting position. In this locked state, the movable arm is oriented inwardly in the pump radial direction by the elastic member, and the engaging protrusion member is engaged with the concave portion, and thus the pump unit is not removed from the drive motor unit unless the operator intentionally releases the locked state of the movable arm.
    [021] In this state, the locking mechanism preferably includes a stop that restricts the rotation of the pump unit in the clamping rotation direction, and this will allow the rotation of the pump unit, at the time of clamping, to be tilted in a position predetermined by the stop, and a mechanical obstacle to be applied to the pump unit in the locked state in both directions.
    [022] In the invention described above, the locking mechanism preferably includes an arm main body that is supported around an intermediate portion on a base provided protruding from a circumferential surface. external of the drive motor unit and which is swivelable in a pump radial direction in a horizontal plane, an elastic member that guides inwardly a coupling end portion side of the arm main body in the pump radial direction, an engagement surface which is provided on the side of the engagement end end portion of the arm main body and which applies a mechanical obstacle on the pump unit in a direction opposite to a clamping rotation direction. , and a guide surface which, in a moment of clamping rotation of the pump unit, causes the side of the hitch end end portion of the arm main body to move outwardly in the radial direction of pump coming in contact with the clamps.
    [023] According to the pump configuration that includes such a locking mechanism, the main body of the arm whose guide surface is in contact (in engagement) with the collet has the guide surface pushed outwards and the side of the hitch end end portion moved outwardly in the pump radial direction when the pump unit whose convex portion is inserted into the concave portion of the drive motor unit is rotated in the clamping rotation direction. As a result, the arm main body overcomes the orientation of the elastic member and opens outwards in a horizontal plane, and when the gripper passes the guide surface and reaches the engagement surface, the arm main body is closed inwards by the orientation of the elastic member.
    [024] The guide surface in this case is preferably an inclined curved or flat surface, but it is not limited to this, as long as the degree of inward protrusion is increased continuously or in steps in the direction of rotation of the fixing unit. bomb.
    [025] With the rotation operation of the pump unit and the operation of the main arm body described above, the locking mechanism reaches a mechanical obstacle, in the engagement position of the tongs and the engagement portions, by the engagement of the surface of engagement of the main body of the supported arm on the side of the drive motor unit and of the collet on the side of the pump unit, and enters a locked state where the pump unit is held in a predetermined mounting position. In this locked state, the main arm body is oriented inwardly in the pump radial direction by the elastic member, and the pump unit is not removed from the drive motor unit unless the operator intentionally releases the locked state of the main body of arm.
    [026] Also in this state, the locking mechanism preferably includes a stop that restricts the rotation of the pump unit in the clamping rotation direction, and this will allow the rotation of the pump unit, at the time of clamping, to be interrupted in a predetermined position by the stop, and by a mechanical obstacle to be applied to the pump unit in the locked state in both directions.
    [027] In the invention described above, a passage is preferably provided between the convex portion provided on the bottom surface of the pump unit and the concave portion provided on the top surface of the drive motor unit, to cause the air to circulate at a time of clamping/separating, and this will allow the air to move through the passage at the time of clamping or separating, thus allowing the pump unit to be smoothly clamped or detached from the pump motor unit. drive.
    [028] In the invention described above, a dimensional tolerance of fit allowed between the convex portion of the pump unit and the concave portion of the drive motor unit is preferably adjusted so that it is less than a dimensional tolerance of fit for the non-return bearing. -contact accommodated inside the pump unit, and this will prevent a non-contact bearing shaft misalignment and allow a smooth rotation of the impeller. Advantageous Effects of the Invention
    [029] According to the pump configuration of the present invention described above, when the convex portion of the pump unit is inserted into the concave portion of the drive motor unit and is rotated, the positioning of the pump unit is performed and the drive motor unit in the propulsion direction and in the radial direction, and also the locking mechanism operates automatically to apply a mechanical obstacle and fix the pump unit, and therefore the setting of the coupling pump. The magnetic drive plate will include a clamping/separating mechanism that allows for simple, reliable and fast positioning and clamping. BRIEF DESCRIPTION OF THE DRAWINGS
    [030] Figure 1 is a view showing an embodiment (a first example) of a pump configuration according to the present invention, and is a perspective view showing a state before assembly where a pump unit and a drive motor unit are not yet integrated (left side of page) and a state after assembly where they are integrated (right side of page).
    [031] Figure 2 is a front view showing the pump configuration after assembly shown on the right side of the page in Figure 1.
    [032] Figure 3 is an explanatory view showing an operation of rotation, and integration, of a pump unit inserted into a concave portion of a drive motor unit, and the left side of the page is a state before the completion of assembly and the right side of the page is a state after completion of assembly (a plan view of Figure 2).
    [033] Figure 4 is a bottom view of Figure 2.
    [034] Figure 5 is a cross-sectional view of Figure 3 along B-B.
    [035] Figure 6 is a cross-sectional view showing a state before insertion of a pump unit into a concave portion of a drive motor unit.
    [036] Figure 7 is an exemplary view showing an operation of fastening a gripper by rotating a pump unit inserted in a concave portion of a drive motor unit, and is a perspective view showing a state before of clamping by clamp (left side of page) and a state after clamping is complete (right side of page).
    [037] Figure 8 is a view showing an embodiment (a second example) of the pump configuration according to the present invention, and is a plan view showing an operating procedure of a locking mechanism that achieves a state locked according to the rotation of a pump unit.
    [038] Figure 9 is a perspective view showing, in relation to the pump configuration of the second example, sequentially, from a state before assembly where a pump unit and a drive motor unit have not yet they are integrated up to a state after assembly where they are integrated.
    [039] Figure 10 is a plan view to describe, in relation to a locking mechanism of the pump configuration shown in Figure 8, an action of a movable arm that moves inward at the time of a pump unit rotating in the opposite direction.
    [040] Figure 11 is a view showing a modified example of the second example. DESCRIPTION OF MODALITIES
    [041] The following describes an embodiment of a pump configuration according to the present invention based on the drawings.
    [042] A one-mode pump configuration shown in Figures 1 through 7 (a first example) is a pump configuration of a centrifugal pump. A centrifugal pump 1 shown in the drawings is termed as a type of coupling where integration is achieved by inserting a convex portion 11 provided on the bottom surface of a pump unit 10 into a concave portion 31 provided on the surface of top of a drive motor unit 30. In this case, the cross-sectional shapes of the convex portion 11 and the concave portion 31 are true circles of substantially the same diameter.
    [043] In addition, the centrifugal pump 1 described above consists, as shown in Figures 5 and 6, for example, in a magnetic drive pump configuration according to which an impeller 21 is rotated to apply pressure on the liquid by magnetic force between an internal magnet 22, which consists of a driven magnet fixed to the impeller 21 which rotates by a hydrodynamic bearing 20, which consists of a non-contact bearing, inside the pump unit 10 and an external magnet 41, which consists of in a drive magnet, which is rotated within the drive motor unit 30 by a motor 40. That is, the magnetic drive centrifugal pump 1 is configured in such a way that the motor 40 and impeller 21 are not coupled, and between the pump unit 10 and the drive motor unit 30 can be completely separated.
    [044] The pump unit 10 includes a fluid inlet 13 and a fluid outlet 14 formed in a resin casing 12. The casing 12 that is shown in the drawing is configured by combining two main parts to accommodate and install the impeller 21.
    [045] The hydrodynamic bearing 20 that supports the impeller 21 rotatably is configured so that it has a shaft portion 21a that is provided protruding from the bottom surface of the impeller 21 fitted into a formed hollow cylindrical portion within the convex portion 11 of the housing 12, and properly fitting a dimensional tolerance of fit, the impeller 21 is made to float by dynamic pressure and rotate in a non-contact state. Additionally, the aforementioned internal magnet 22 is fixed within the shaft portion 21a of the impeller 21 and is accommodated and installed.
    [046] A plurality of tongs 15 are provided which engage the engagement portions 32, described further below, on the side of the drive motor unit 30, outwardly and protrudingly, on an outer circumferential surface of the pump unit 10, or, more specifically, on a sidewall surface 12a of the housing 12. The clip 15 is a horizontal plate portion that is substantially rectangular in plan view, and in the exemplary configuration shown in the drawing, three clips 15 they are provided in the circumferential direction at an inclination of 120 degrees, however, this is not restrictive.
    [047] Similarly, an engaging protrusion member 51, consisting of a structural member of a locking mechanism 50 described later, is protrudingly provided on the side wall surface 12a, which is the surface. circumferential outer circumferential of the pump unit 10, in a position that does not interfere with the engaging portion 32. The engaging protrusion member 51 is a horizontal plate member provided outwardly and protruding from the pump unit 10, i.e. , side wall surface 12a of housing 12. A guide engaging surface 52 is formed on an outer circumferential edge surface of the engaging protrusion member 51. The guide engaging surface 52 includes an inclined surface 52a whose degree of bulge increases in the opposite direction from a fixation rotation direction shown by an arrow R in Figure 1, and a step 52b that is sharply kneaded in from the surface. and inclined 52a.
    [048] The motor drive unit 30 includes the motor 40 for driving within an aluminum or resin casing 33 of a substantially cylindrical bottom shape. Motor 40 is accommodated and installed in the bottom of housing 33. Likewise, a drive rotor 43 to which external magnet 41 is attached is provided to an upwardly projecting motor shaft 42.
    [049] The drive rotor 43 is a substantially cylindrical bottom member having a motor shaft 42 coupled to its bottom surface. The outer magnet 41 is fixed on an inner circumferential surface 43a of the drive rotor 43.
    [050] The concave portion 31 is formed on the inner circumferential side of the outer magnet 41 to insert the convex portion 11 of the pump unit 10, and a resin sealing member 34, forming the casing 33, to seal an upper opening for installing motor 40 is attached thereto. Additionally, a reference signal 35 in the drawing is a rotation stop for restraining the rotation direction of fixing R of the pump unit at a predetermined position, and a reference signal 36 is a cable hole.
    [051] As a result, when the convex portion 11 of the pump unit 10 is inserted into the concave portion 31 of the drive motor unit 30 to a predetermined position, the inner magnet 22 will be disposed on the inner circumferential side of the outer magnet 41 in a manner facing along resin members, such as sealing member 34, casing 33 and the like.
    [052] On an upper outer circumferential portion of the drive motor unit 30 described above, three engagement portions 32 disposed at an inclination of 120 degrees in the circumferential direction are provided so that they engage tongs 15 in mounting positions predetermined when the pump unit 10 is rotated in the fixing rotation direction R.
    [053] Engagement portion 32 is a substantially C-shaped member in cross-section that forms an engagement surface 32b by bending inwardly an upper end portion of a column portion 32a extending in the vertical direction. Correspondingly, when the collet 15 rotates together with the pump unit 10, the thick part of the collet 15 enters the C-shaped part in cross section of the engagement portion 32, and the upward movement of the collet 15 and the pump unit 10 is restricted. In this case, a thickness t of the tong 15 is adjusted so that it is substantially equal to or somewhat greater than a height h of the engaging portion 32 such that the resin tong 15 is press-fitted into the resin engaging portion. 32 and an action is avoided.
    [054] In addition, the centrifugal pump 1 described above includes the locking mechanism 50 which serves to keep the pump unit 10 in a position of engagement of the collet 15 and the engagement portion 32.
    [055] The locking mechanism 50 includes the engagement protrusion member 51 described above on the outer circumferential edge surface protruding outwardly from the pump unit 10. The guide engagement surface 52 formed from the surface slope 52a, the degree of protrusion of which increases in the opposite direction from the fixation rotation direction R, and the tier 52b is formed on the engagement protrusion member 51.
    [056] In addition, the locking mechanism 50 includes a movable arm 53 which is fixed on the outer circumferential surface of the motor drive unit 30.
    [057] The movable arm 53 includes a main arm body 54 which is supported, around the intermediate portion, on the outer circumferential surface of the casing 33 and which is capable of oscillating in a radial pump direction, an elastic member, not shown, which inwardly orients the upper end portion of the arm main body 54 in the pump radial direction, a concave portion 55 provided on the side of the upper end portion of the arm main body 54 and which engages the protrusion member. engaging flange 51, and a guide wall 56 which causes the main arm body 54 to swing into contact with the sloping surface 52a and which acts as a mechanical obstacle for the pump unit 10 engaging the step 52b. That is, the movable arm 53 is supported by a pin 57 and is swivelable in the pump radial direction in a vertical plane, and normally, a pressure is applied on an inner circumferential tip end of the concave portion 55 towards the surface. of sidewall 12a of the pump unit 10 by the bias of the elastic member.
    [058] By providing such a locking mechanism 50, when the pump unit 10 whose convex portion 11 is inserted into the concave portion 31 of the drive motor unit 30 is rotated in the direction of rotation of fixing R, the main arm body 54 whose guide wall 56 is in contact with sloping surface 52a is made to move along sloping surface 52a whose degree of protrusion increases in the direction opposite to the direction of rotation of attachment R. Therefore, the bias of the elastic member is it is overridden, and the guide wall 56 is pushed out.
    [059] As a result, the movable arm 53 is opened outwards, overcoming the bias of the elastic member, and then, when the guide wall 56 passes the inclined surface 52a and reaches the step 52b, the movable arm 53 is automatically closed inward by the propensity of the elastic member. Then, engaging protrusion member 51 enters concave portion 55, and step 52b and guide wall 56 are engaged. That is, at the time of assembly of the pump unit 10 and the drive motor unit 30, the locking mechanism 50 operates automatically without the movable arm 53 being operated, and a state is obtained where the pump unit 10 is restricted from rotate in the opposite direction to the clamp rotation direction R.
    [060] If the stop 35 which serves to restrict rotation in the rotation direction of clamping R is provided as needed, as shown in Figure 1, for example, it prevents the pump unit 10 from moving in the rotation direction clamp R or in the opposite direction when the locking mechanism 50 has been operated.
    [061] The centrifugal pump 1 configured in the above manner is positioned in the direction of propulsion in a state where the convex portion 11 is inserted to the predetermined position in the concave portion 31, having a bottom surface of the pump unit 10 (a bottom surface 12b of casing 12) and a top surface of motor drive unit 30 (a top surface 34a of sealing member 34 forming casing 33) in surface contact with each other. Likewise, a positioning in the radial direction is obtained when the outer circumferential surface of the convex portion 11 and the inner circumferential surface of the concave portion 31, both shaped as a true circle in a cross section, come into contact between themselves.
    [062] In this case, the allowable dimensional tolerance of fit between the convex portion 11 of the pump unit 10 and the concave portion 31 of the drive motor unit 30 is adjusted to be smaller (stricter) than the dimensional tolerance of fit of the hydrodynamic bearing 20 accommodated inside the pump unit 10 in order to avoid a misalignment of the axis of the hydrodynamic bearing 20. That is, if the dimensional tolerance of fit between the convex portion 11 and the concave portion 31 is smaller than for the hydrodynamic bearing 20, since the rotation of the impeller 21 is specified by the dimensional tolerance of fit of the hydrodynamic bearing 20, a smooth rotation of the impeller 21 is not impeded by the engagement of the units.
    [063] Then, when the pump unit 10 is rotated in the fixing rotation direction R from a state where the convex portion 11 of the pump unit 10 and the concave portion 31 of the drive motor unit 30 are engaged, that is, when they are rotated until any gripper 15 abuts the stop 35, the grippers 15 in three positions enter the corresponding concave portions 31 of the engaging portion 32, and upward movement is restricted. As a result, the pump unit 10 is attached to the drive motor unit 30 with respect to the direction of propulsion.
    [064] Furthermore, at the same moment of such retention, the locking mechanism 50 automatically operates to restrict the rotation of the pump unit 10. In this locked state, the movable arm 53 is oriented inwardly in the pump radial direction by the elastic member, and, also, the engaging protrusion member 51 is engaged with the concave portion 55, and therefore the pump unit 10 does not come out of the drive motor unit 30 unless the operator intentionally releases the locked state of the movable arm. 53. Additionally, at the time of releasing the locking mechanism 50, the arm main body 54 can be opened by moving outwardly the upper end portion side by pressing the lower end portion side of the main body arm 54 inward against the bias of the spring member and using pin 57 as a fulcrum.
    [065] Now, a concrete assembly procedure is described to fix the pump unit 10 to the drive motor unit 30 and integrate the two.
    [066] First, the convex portion 11 of the pump unit 10 is vertically inserted and fixed to the concave portion 31 of the drive motor unit 30. At this point, if the locking mechanism 50 is left disengaged, that is, if the lower end portion side of the arm main body 54 is pressed inwards and the engagement to the engagement protrusion member 51 is left released, the movable arm 53 will not interfere with the pump unit 10.
    [067] Thereafter, the pump unit 10 is rotated in the rotation direction of fixing R, and the collet 15 of the pump unit 10 is induced to coincide with the engagement portion 32. As a result, the collet 15 enters the C-shaped part in cross section of the engaging portion 32, and upward movement is impeded by the engaging surface 32b. By rotating the pump unit 10 to a predetermined position, for example, until it abuts the stop 35, the pump unit 10 and the drive motor unit 30 are positioned in relation to the direction of propulsion and the direction. radial.
    [068] At the same time of positioning, the locking mechanism 50 automatically operates by the guide wall 56 moving along the inclined surface 52a, and the pump unit 10 is secured to prevent rotation.
    [069] As a result, the pump unit 10 is positioned and fixed relative to the drive motor unit 30 in the direction of propulsion, the radial direction and the direction of rotation.
    [070] On the other hand, when removing the pump unit 10, that is, when an operator intentionally separates the pump unit 10 from the drive motor unit 30, an operation of pressing the movable arm 53 needs to be performed , and a configuration is obtained where an erroneous operation is not easily performed.
    [071] The positional relationship between the fluid outlet 14 and the cable hole 36 can be adjusted as appropriate based on the arrangement of the collet 15 and the engagement portion 32, or the arrangement of the locking mechanism 50.
    [072] In addition, to improve the operability at the time of attachment or separation of inserting or vertically attracting the convex portion 11 of the pump unit 10 from the concave portion 31 of the drive motor unit 30, i.e., to to allow for a smooth clamping/separating operation, an air passage for causing air to circulate at the time of clamping or separation is preferably provided between the convex portion 11 and the concave portion 31. As an air passage, a groove, or something of the sort, provided, for example, on a wall surface of the convex portion 11 or the concave portion 31 in the insertion direction is effective. In other words, no limitation is imposed as long as a passageway is formed which can smoothly exhaust the air within the concave portion 31 at the time of assembly of the pump unit 10 or which allows air to smoothly enter the concave portion 31 at the time of separation of pump unit 10.
    [073] Furthermore, as shown in Figure 6, if the opening size of only the top of the sidewall of the concave portion 31 is made small and the opening size of the bottom of the sidewall is made larger than the top, a malfunction that the hydrodynamic bearing of the drive motor unit fails to function can be avoided.
    [074] As described, according to the pump configuration of the modality described above, when the pump unit 10 is rotated with the convex portion 11 inserted in the concave portion 31 of the drive motor unit 30, the pump unit 10 and the drive motor unit 30 are positioned in relation to the propulsion direction and the radial direction, and also the locking mechanism 50 automatically operates to apply a mechanical obstacle and secure the pump unit 10, and therefore, the magnetic drive coupling pump configuration is equipped with a clamping/separating mechanism capable of performing positioning and clamping simply, reliably and quickly.
    [075] Furthermore, the pump configuration of the modality described above also has an advantage that, having a simple structure, the number of parts can be reduced and costs can be reduced.
    [076] In addition, precise positioning in both the thrust and radial direction increases the rotational accuracy of the impeller 21, and is effective in improving the performance of a non-contact bearing, such as the hydrodynamic bearing 20 or a bearing thus significantly facilitating manufacturing and quality management. Likewise, in case a pivot bearing or a sealed bearing is used, its durability can be effectively increased.
    [077] In addition, since the pump unit 10 can be reliably fixed, positioning accuracy is not impaired due to vibration at the time of pump operation, or the like, an unexpected separation or malfunction of the pump is less likely to occur. pump unit 10, and also separation of the pump unit 10 due to improper use by an operator or due to a lack of care can be avoided, and therefore risks referring to a weak fixation can be reduced.
    [078] Likewise, since assembly can be achieved even in a situation where a quick change of pumps is required by quickly and reliably attaching the pump unit 10, an application to a cardiopulmonary device, or similar, used in an emergency is also possible.
    [079] In addition, with the pump unit 10 of the present modality, when using it in a cardiopulmonary device, for example, to allow immediate use in an operating room, the pump unit 10 is preferably sterilized by gas. ethylene oxide at 80 degrees without being sterilized in an autoclave before use, and then charged with a saline solution without dissolved oxygen by depressurization or increase in temperature, and sealed having seals or coupling units connected to fluid inlet 13 and at the fluid outlet 14 of the pump unit 10.
    [080] In addition, air tends to be collected in the hydrodynamic bearing 20 or in a space below a shaft when filling the pump unit 10 with a saline solution, however, if the saline solution is injected while rotating the shaft portion 21a, this will eliminate any remaining air pockets, and therefore it is preferable that saline is injected while rotating shaft portion 21a.
    [081] Similarly, also when exhausting the ethylene oxide gas, if the gas is replaced by air while the shaft portion 21a is being rotated, an advantage can be obtained that the replacement time can be shortened .
    [082] In a preactivation procedure, when sterilizing pump unit 10 by ethylene oxide gas at 80 degrees, since a neodymium magnet is demagnetized at a high temperature of about 80 degrees, it is preferable that Dy is added by about one percent to raise the degaussing temperature, or the degaussing value is taken into account in relation to the degree of degaussing, or an SmCo magnet whose degaussing temperature is greater than that is used. of neodymium magnet.
    [083] In addition, since the neodymium magnet is mainly made of Fe and easily rusted, it is usually coated with Ni metal, however, to increase reliability, it is preferable to be fully coated with a resin such as like high density polyethylene.
    [084] In the following, another modality (a second example) of the pump configuration according to the present invention will be described based on Figures 8 to 10. Additionally, in the description below, the parts that are the same as those of the modality described above -then will be denoted with the same reference signs, and the detailed description of these will be omitted.
    [085] A centrifugal pump 1A of the second example adopts a locking mechanism 60 whose coupling tip end portion side is constructed so that it is oscillable in a pump radial direction in a horizontal plane, rather than the mecha- locking mechanism 50 which is swivelable in the pump radial direction in a vertical plane.
    [086] The locking mechanism 60 includes an arm main body 61 that is swivelable in a horizontal plane, an elastic member (not shown) that guides the arm main body 61, an engagement surface 62 that is provided on one side. of the engagement stub end portion of the arm main body 61, and a guide surface 63 which causes the engagement stub end portion of the arm main body to oscillate outwardly in the pump radial direction. .
    [087] The main body of arm 61 consists of a member that is bent into a substantially V-shape in a plan view. The main arm body 61 is a movable arm supported by a pin 64 around the intermediate (bent) portion on a base 37 protruding from an outer circumferential surface of a motor unit. drive 30A, and which is swingable around pin 64 in a horizontal plane.
    [088] Furthermore, the arm body 61 is oriented towards a direction of oscillation by an elastic member, such as a torsion spiral spring, for example. That is, one end of the arm member 61 is oriented inwardly in the radial pump direction, and biased towards the outer circumferential surface of the pump unit 10A.
    [089] An engagement surface 62 is obtained by enlarging one end of the main arm body 61 and providing a step. That is, the engagement surface 62 which acts as a mechanical obstacle in the opposite direction of a fixing rotation direction R of the pump unit 10A is provided on a tip end side of the arm main body 61 which is inwardly oriented. by the elastic member in the pump radial direction and pressed towards the outer circumferential surface of the pump unit 10A. The engagement surface 62 is a surface which substantially coincides with the radial direction of the pump unit 10A, and is substantially equal in height as a collet 15 and an engagement portion 32 in a state where the convex portion 11 of the pump unit 10A is inserted into a concave portion 31 of the drive motor unit 30A.
    [090] In the following description, the nose end side of the arm main body 61 provided with an engagement surface 62 will be referred to as one side of the engagement nose end portion, and the other end side of the main body of arm 61 will be referred to as a release lever side.
    [091] The guide surface 63 is a curved surface formed on the inner circumferential surface of the main arm body 61 (on the surface facing the outer circumferential surface of the pump unit 10A), and is a sloping surface that enters in contact with the collet 15 at the time of clamping/rotation of the pump unit 10A and causes the hitch end end portion of the arm main body 61 to move (oscillate) outwardly in the pump radial direction. Guide surface 63 is formed between pin 64 and engagement surface 62. In the exemplary configuration shown in the drawing, guide surface 63 is a curved guide surface 63 whose side of the engagement tip end portion is wide and protrudes towards the outer circumferential surface of the pump unit 10A, and the width value (the degree of protrusion) is continuously (gradually) reduced in the opposite direction to the direction of rotation of fixing R of the pump unit 10A .
    [092] That is, the curved guide surface 63 is formed on the inner circumferential side of the arm main body 61 with the arm width increasing towards the engagement surface 62 from the pin side 64, which is the center of oscillation, and the arm width abruptly decreases at the engagement surface 62 formed on the side of the engagement tip end portion to form a step in the pump radial direction.
    [093] The centrifugal pump 1A that includes such a locking mechanism 60 is mounted by rotating the pump unit 10A whose convex portion 11 is inserted into the concave portion 31 of the drive motor unit 30A in the clockwise direction of rotation of clamping A. At this time, the arm main body 61 whose guide surface 63 is in contact with the collet 15 has the guide surface 63 pushed outward and the side of the hook end end portion moved outwardly at the pump radial direction.
    [094] As a consequence, the main body of arm 61 overcomes the bias of the elastic member and opens outward in a horizontal plane. In other words, the main arm body 61 opens outwards in a horizontal plane under the pressure of the collet 15, which is stronger than the bias of the elastic member.
    [095] When the pump unit 10A rotates to a predetermined position in this way, another gripper 15 abuts a stop 35, and also the gripper 15 passes through the guide surface 63 and reaches the engagement surface 62. Therefore , the main arm body 61 is disengaged from engagement with the collet 15, and is closed inwardly by the bias of the elastic member.
    [096] By the rotational operation of the pump unit 10A and the operation of the main arm body 61 described above, the locking mechanism 60 achieves a mechanical obstacle with the engagement surface 62 of the main body of arm 61 supported on the side of the unit. drive motor 30A and gripper 15 on the side of pump unit 10A being engaged in a predetermined mounting position where gripper 15 and engaging portion 32 are engaged. As a result, the pump unit 10A is prevented by the stop 35 from rotating in the clamping rotation direction R and by the engagement surface 62 from rotating in the opposite direction to the clamping rotation direction R, and therefore enters a locked state. where it is held in a predetermined mounting position where it is not allowed to rotate in any direction.
    [097] Then, in this locked state, as in the modality described above, the side of the hitch end portion of the arm main body 61 is oriented inwardly in the pump radial direction by the elastic member and the upward movement of the pump unit. pump 10A is restricted by the engagement of tong 15 and engagement portion 32, and therefore pump unit 10A is not removed from motor drive unit 30A unless an operator intentionally releases the locked state of the main body from arm 61.
    [098] As for the lock release operation, the outer circumferential surface on the release lever side of the arm main body 61 is pressed inwards in the pump radial direction, and the coupling tip end portion side is rotated out in radial pump direction.
    [099] Furthermore, as shown in Figure 10, for example, if a joint H, which consists of a fulcrum that serves to bend the deformation of the main body of arm 61, is out of a tangential force F, a force inwardly in the pump radial direction acts on the side of the hitch end end portion at the time of rotating the pump unit 10A in the direction opposite to the fixing rotation direction R in a predetermined mounting state. Therefore, if the pump unit 10A is simply rotated in the opposite direction to the clamping rotation direction R, this operation is in the opposite direction to the release of the locking mechanism 60, and the lock is not released unless the operation of lock release described above is performed.
    [0100] In addition, the guide surface 63 described above is a curved surface formed on the inner circumferential surface of the arm main body 61, however, as shown as a modified example in Figure 11, an arm main body 61A may include a guide surface 63A, which consists of a straight inclined surface. Additionally, the guide surface 63A shown in the drawing includes a flat surface 65 between itself and an engagement surface 62, however, the straight tilt guide surface may start immediately from the engagement surface 62.
    [0101] According to the configuration of the modified example, when a pump unit 10A is rotated in a clamping rotation direction R, a collet 15 contracts the guide surface 63A and the main arm body 61A is thereby pushed out. Thereby, the pump unit 10A is allowed to rotate in the rotational direction of clamping R. Then, when the pump unit 10A rotates to a predetermined position, another gripper 15 abuts a stop 35, and the gripper 15 passes through the guide surface 63 and reaches engagement surface 62.
    [0102] Correspondingly, the main arm body 61A is closed inwardly by the propensity of an elastic member being disengaged from engagement with the collet 15, and as a result, the pump unit 10A is impeded by the engagement surface 62 and by stop 35 to rotate in any direction.
    [0103] As described, according to the pump configuration of the second example described above, when the pump unit 10A is rotated with the convex portion 11 inserted into the concave portion 31 of the drive motor unit 30A, the pump unit 10A and the drive motor unit 30A are positioned in relation to the propulsion direction and the radial direction, and also the locking mechanism 60 automatically operates to apply a mechanical obstacle and secure the pump unit 10A, and, therefore, the magnetic drive coupling pump configuration is provided with a clamping/separating mechanism capable of performing positioning and clamping simply, reliably and quickly.
    [0104] Furthermore, the pump configuration of the second example described above also has an advantage that, having a simple structure, the number of parts can be reduced and costs can be reduced.
    [0105] Additionally, the present invention is not limited to the embodiments described above, and may be appropriately modified without departing from the spirit of the invention; for example, no limitations imposed on the fluid to be treated. List of Reference Signals 1, 1A Centrifugal pump 10, 10A Pump unit 11 Convex portion 12, 33 Housing 12a Side wall surface 13 Fluid inlet 14 Fluid outlet 15 Clamp 20 Hydrodynamic bearing (Non-contact bearing) 21 Impeller 21a Shaft portion 22 Inner magnet (Drive magnet) 30, 30A Drive motor unit 31 Concave portion 32 Engagement portion 34 Sealing member 35 Stop 37 Base 40 Motor 41 External magnet (Drive magnet) 42 Motor shaft 43 Rotor drive 43a Inner circumferential surface 50, 60 Locking mechanism 51 Engagement protrusion member 52 Guide engagement surface 52a Sloped surface 52b Step 53 Swing arm 54, 61, 61A Main arm body 55 Concave portion 56 Guide wall 57, 64 Pin 62 Engagement surface 63, 63A Guide surface 65 Flat surface
    权利要求:
    Claims (5)
    [0001]
    1. Magnetic drive pump configuration CHARACTERIZED by being a type of coupling that inserts a convex portion (11) provided in a bottom surface of a pump unit (10) into a concave portion (31) provided in a top surface of a motor drive unit (30) to obtain an integration, and according to which the magnetic force generated between a driven magnet (22) fixed to an impeller (21) rotating by a non-contact bearing (20) inside the pump unit (10), and a drive magnet (41) which rotates by a motor (40) within the drive motor unit (30) rotates the impeller (21) and applies pressure on the liquid, wherein positioning in a propulsion direction is achieved by the bottom surface of the pump unit (10) and a top surface of the drive motor unit (30) which are in surface contact with each other in a state where the convex portion ( 11) is inserted to a predetermined position in the concave portion (31) and positioning in a radial direction is achieved by a contact between an outer circumferential surface of the convex portion (11) and an inner circumferential surface of the concave portion (31) and wherein the pump configuration comprises a plurality of tongs ( 15) provided protrudingly on the outer circumferential surface of the pump unit (10), a plurality of engaging portions (32) provided upwardly and protrudingly from an upper outer circumferential portion of the drive motor unit (30 ) to restrict the upward movement of the tongs (15) entering into engagement when the pump unit is rotated into a state where the convex portion (11) is inserted to a predetermined position in the concave portion (31) and a locking mechanism ( 50) to maintain the pump unit (10) in an engaging position of the tongs (15) and the engaging portions (32) wherein the locking mechanism (50) includes: a protrusion member engagement rod (51) having a guide engagement surface (52) formed on an outer circumferential edge surface projecting outwardly from the pump unit (10), which begins as an inclined surface (52a) of which degree of bulge increases in an opposite direction from a fixation rotation direction (R) being a step (52b), and a movable arm (53) having an arm main body (54) that is supported around of an intermediate portion, on an outer circumferential surface of the drive motor unit (30) and which is swivelable in a pump radial direction in a vertical plane, an elastic member which orients inwardly on a side of the upper end portion of the arm main body (54) in the pump radial direction, a concave portion (55) which is provided on the upper end portion side of the arm main body (54) and which engages with the engagement protrusion member (51 ), and a guide wall (56) that causes and the main arm body (54) swings into contact with the inclined surface and which applies a mechanical obstacle on the pump unit (10) engaging the step (52b).
    [0002]
    2. Magnetic drive pump configuration CHARACTERIZED by being a type of coupling that inserts a convex portion (11) provided in a bottom surface of a pump unit (10A) into a concave portion (31) provided in a top surface of a motor drive unit (30A) to obtain an integration, and according to which the magnetic force generated between a driven magnet (22) fixed to an impeller (21) rotating by a non-contact bearing (20) inside the pump unit (10A), and a drive magnet (41) which rotates by a motor (40) within the drive motor unit (30A) rotates the impeller (21) and applies pressure to the liquid, in which positioning in a propulsion direction is achieved by the bottom surface of the pump unit (10A) and a top surface of the drive motor unit (30A) which are in surface contact with each other in a state where the convex portion ( 11) is inserted to a predetermined position in the concave portion (31), and positioning in a radial direction is achieved by a contact between an outer circumferential surface of the convex portion (11) and an inner circumferential surface of the concave portion (31), and in which the pump configuration comprises a plurality of tongs (15) provided protrudingly on the outer circumferential surface of the pump unit (10A), a plurality of engaging portions (32) provided upwardly and protrudingly from an upper outer circumferential portion of the unit. of drive motor (30A) to restrict the upward movement of the tongs (15) entering into engagement when the pump unit (10A) is rotated in a state where the convex portion (11) is inserted to a predetermined position in the concave portion ( 31), and a locking mechanism (60) for holding the pump unit (10A) in an engagement position of the tongs (15) and the engagement portions (32) wherein the locking mechanism (60) includes a ç main arm body (61, 61A) which is supported, around an intermediate portion, on a base (37) provided protruding from an outer circumferential surface of the drive motor unit (30A) and which is swivelable in a pump radial direction in a horizontal plane, an elastic member orienting inwardly an engagement point end portion side of the arm main body (61, 61A) in the pump radial direction, an engagement surface (62 ) which is provided on the hitch end portion side of the arm main body (61, 61A) and which applies a mechanical obstacle on the pump unit (10A) in a direction opposite to a fixing rotation direction ( R), and a guide surface (63, 63A) which, at a time of the clamping rotation of the pump unit (10A), causes the engagement end portion side of the arm main body (61 , 61A) swing out in radial direction of pump coming into contact. touch with the tweezers (15).
    [0003]
    3. Pump configuration according to claim 1 or 2, CHARACTERIZED by the fact that the locking mechanism includes a stop (35) that restricts the rotation of the pump unit (10, 10A) in the direction of rotation of the clamp ( A).
    [0004]
    4. Pump configuration according to any one of claims 1 to 3, CHARACTERIZED by the fact that a passage is provided between the convex portion (11) provided on the bottom surface of the pump unit (10, 10A) and the concave portion (31) provided on the top surface of the drive motor unit (30, 30A), to cause air to circulate at a clamping/separating moment.
    [0005]
    5. Pump configuration, according to any one of claims 1 to 4, CHARACTERIZED by the fact that a dimensional tolerance of fit allowed between the convex portion (11) of the pump unit (10, 10A) and the concave portion (31 ) of the drive motor unit (30, 30A) is adjusted so that it is less than a dimensional adjustment tolerance for the non-contact bearing accommodated within the pump unit (10, 10A).
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    同族专利:
    公开号 | 公开日
    US20140234141A1|2014-08-21|
    US9239057B2|2016-01-19|
    BR112013006692A2|2016-06-07|
    EP2674624A1|2013-12-18|
    WO2012108475A1|2012-08-16|
    JPWO2012108475A1|2014-07-03|
    US20150110652A1|2015-04-23|
    US8985969B2|2015-03-24|
    CN103080557B|2015-11-25|
    EP2674624B1|2019-07-03|
    EP2674624A4|2018-02-28|
    CN103080557A|2013-05-01|
    JP5372267B2|2013-12-18|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-04-09| B25A| Requested transfer of rights approved|Owner name: NIPRO CORPORATION (JP) |
    2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-01-26| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-07-13| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011027764|2011-02-10|
    JP2011-027764|2011-02-10|
    PCT/JP2012/052892|WO2012108475A1|2011-02-10|2012-02-08|Pump configuration|
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