• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    According to a first aspect, the present invention relates to a propeller pump comprising a pump housing and a pump core that is arranged in the pump housing and has a propeller, which together delimit a channel, and which are connected by means of a guide vane. The propeller pump is characterized in that a cross-sectional area (A2) of the channel (27) at the rear edge (30) of the guide vane (13) has a measure that is greater than, and that is less than a factor of 1,1 times, a cross-sectional area (A1) at the rear edge (29) of the blades (21) of the propeller, and that the specific rotational speed of the propeller pump is greater than 200 and less than 300. According to a second aspect, the present invention relates to a pump station comprising such a propeller pump.
    公开号:SE1151185A1
    申请号:SE1151185
    申请日:2011-12-13
    公开日:2013-06-14
    发明作者:Joergen Burman
    申请人:Xylem Ip Holdings Llc；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF THE INVENTION The present invention relates generally to a propeller pump, also known as an axial pump, for pumping liquid. A propeller pump is normally used to transport the large river of water with relatively high pressure. In particular, the present invention relates to a propeller pump comprising an axially extending groove-shaped pump housing which has an inner surface and which comprises an inlet opening and an outlet opening. The propeller pump also comprises an axially extending pump core with a jacket surface, at least one axial sub-section of the pump core being surrounded by said pump housing. In addition, the propeller pump comprises at least one radially extending guide rail, which is connected to the inner surface of the pump housing and the circumferential surface of the pump core. The pump core in turn comprises a drive unit and a relatively drive unit upstream of the hydraulic unit, which comprises a propeller with a nay and at least one blade. The propeller pump also comprises an axially extending channel which extends from the inlet opening of the pump housing to the outlet opening of the pump housing, which channel is delimited in radial direction by the inner surface of the pump housing and the circumferential surface of the pump housing, respectively.
    In a second aspect, the present invention relates to a pumping station comprising such a propeller pump and a feed tube, the propeller pump Or being arranged in the lower spirit of the feed tube.
    Background of the invention and state of the art Previously known propeller pumps have been designed according to an accepted hypothesis in the field of propeller pumps, which, among other things, is based on the following Propeller pumps are designed so that the cross-sectional area of the propeller pump channel must be as axial as possible. Increase from the cross-sectional area (A1) found in the area of the trailing edge to the blade of the propeller to as large a cross-sectional area (A2) as possible in the area of the guide rails. increase further to a larger cross-sectional area (A3) in the area of the channel outlet opening. This is to minimize the losses with as much pressure recovery as possible. However, the possibility of minimizing the axial distance is limited by the fact that separation (the area with the rearward surfaces) occurs when the cross-sectional area increases too much. The emergence of separation meant that the losses increased significantly. The knowledge about the degree of cross-sectional area increase that is possible without separation occurring in previously known propeller pumps has been based on viscous coverings where the designers relied on empirical, so-called diffusion factors to determine whether separation occurs in the guide rail passage. These factors were developed through cascade samples ph 50s. In the case of the diffuser after the trailing edge of the guide rails to the outlet opening of the duct, reference has been made to so-called performance diagrams for canceled diffusers.
    The following are examples of accepted area conditions according to the above hypotheses: 1.4 * A1] and [A32.3 * A1]. These area ratios apply to propeller pumps with a relatively high specific speed (nq), for example in the range 200-300, which is a measure of how much fluid flow Q can be transported to a certain pressure head H by a propeller pump operating at a nominal speed n, ddr [nq = n, Q (1/2) / H (3/4),] Such a construction means that, as a result of the rapid increase in area, a lower surface velocity is obtained in the fastest possible way, and a direct consequence of this has according to the hypothesis is considered to be that the losses that occur in the area downstream of the propeller pump byre Spirit will be minimized.
    Propeller pumps designed according to the above hypothesis have, however, been shown to create large losses and large areas with separation in the channel in the area of the guide rails and / or in the diffuser downstream of the rear edge of the guide rails and / or in the casing downstream of the propeller pump. This is because the diffusion factors are based on two-dimensional experiments that do not take into account e.g. secondary flow and the curvature 3 of the channel. The performance diagrams for diffusers also have limitations, such as that they presuppose so-called linear duct walls (the mantle surface of the pump core and the inner surface of the pump housing) and a uniform flow velocity profile into the diffuser, ie an Ia. = 5 flow velocity profile along the cross-sectional area taken in the area of the trailing edge of the guide rails.
    SUMMARY OF THE OBJECTS OF THE INVENTION The present invention aims to obviate the above-mentioned disadvantages and shortcomings of prior art propeller pumps and to provide an improved propeller pump.
    A basic object of the invention is to provide an improved propeller pump of the initially defined type, which provides a uniform surface velocity profile at the cross-sectional area taken in the area of the trailing edge of the guide rails and / or in the area of the outlet opening of the duct.
    A further object of the present invention is to provide a propeller pump which needs a relatively narrower feed tube.
    Brief description of the features of the invention According to the invention, at least the basic object is achieved by means of the initially defined propeller pump 25 and the pump station, which features have the features defined in the independent claims. Preferred embodiments of the present invention are further defined in the dependent claims.
    According to a first aspect of the present invention, there is provided a propeller pump of the initially defined type, which is characterized in that a cross-sectional area (A2) has said channel in the region of a trailing edge and said at least one guide rail is greater than or equal to a cross-sectional area (A1). If the channel is in the region of a trailing edge, the propeller has at least one blade, that the cross-sectional area (A2) has said channel in the region of said at least one guide rail edge is less than or equal to 4 by a factor of 1.1 ginger the cross-sectional area (A1) of said channel in the region of the rear edge of the propeller at least one blade, and that the propeller pump has a specific speed (nq) which is greater than or equal to 200 and which is less than or equal to 300.
    According to a second aspect of the present invention, there is provided a pumping station comprising such a propeller pump.
    Thus, the present invention is based on the insight that, for a certain group of propeller pumps with a specific speed ranging from 200-300, by controlled modest cross-sectional increase, the pump housing channel has a position located at the area of the trailing edge of the propeller blade and a position coated at the area of the trailing edge of the guide rails and at the outlet opening of the channel, respectively, a controlled flow velocity profile is obtained along the cross-sectional area taken in the area of the trailing edge of the guide rails and / or the outlet opening of the channel, without occurrence of backward flow.
    According to a preferred embodiment of the present invention, a cross-sectional area (A3) has said channel in the area of the outlet opening of the pump housing rigid On or equal to a cross-sectional area (AJ has the channel in the area of a trailing edge has said at least one guide rail, and cross-sections has said channel in the area of the pump housing outlet opening Or less On or equal to a factor of 1.9 times the cross-sectional area (A1) has said channel in the area of the rear edge of the propeller at least one blade, this means that by controlled modest cross-sectional increase the pump housing channel has between position located at the area of the trailing edge of the guide rail and a position occupied at the area of the outlet opening of the duct, a jimn river velocity profile is obtained along the cross-sectional area taken in the area of the outlet opening of the duct, which gives for losses downstream of the propeller pump.
    According to a preferred embodiment, the pump core further comprises a sealing unit, which in turn comprises an axially extending tubular oil housing and said at least one guide rail, said sealing unit Or arranged around said pump housing, said at least one guide rail being fixedly connected to an inner surface of the pump. and a mantle surface has the oil house. This results in a robust construction of a supporting unit having the propeller pump, whereby the hydraulic unit and drive unit can easily be connected to the supporting unit.
    Further advantages and features of the invention will be apparent from other dependent claims and from the following detailed description of preferred embodiments.
    Brief Description of the Drawings A more complete understanding of the above and other features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings, in which: Fig. 1 is a perspective view from above of a drawing; Fig. 2dr a schematic sectional side view of a pumping station according to the invention comprising a propeller pump according to Fig. 1, Fig. 3dr a sectional side view of the propeller pump according to Fig. 1, Fig. 4dr an enlargement of a part of Fig. 3, Figs. Fig. 6 is a top view of the propeller pump of Figure 1, and Fig. 6 is a bottom view of the propeller pump of Figure 1.
    Detailed Description of the Preferred Embodiments References are initially made to Figures 1 and 2. The present invention relates generally to a propeller pump, or axial pump, generally designated 1, for pumping / transporting liquids such as water, stormwater, wastewater, etc. Propeller pumps there are generally arranged to transport large water flows with relatively low pressure. Furthermore, a propeller pump according to the present invention is designed to have a specific speed (nq) which is greater than or equal to 200, and which is less than or equal to 300. The specific speed is determined as [nq = n * Q ") / H4)], ddr n = the nominal speed of the propeller pump, Q = the pumped liquid flow, and H = the pressure height of the pumped liquid.
    Figure 1 shows a perspective view of a propeller pump 1 according to the invention and Figure 2 shows a part of a schematic pump station comprising one or more propeller pumps 1, each propeller pump 1 being arranged in a lower end of a casing 2 extending from a lower basin 3 to a byre basin 4, for the purpose of transporting liquid from the lower basin 3 to the upper basin 4. It should be noted that the axial length of the casing 2 is usually several times the axial height of the propeller pump 1, and that the propeller pump 1 and the casing 2 dr concentrically arranged in relation to each other. The propeller pump 1 is connected to one or more cables 5 for power supply and possible signal transmission, which cables 5 run from the propeller pump 1 up via the inside of the feed rudder 2 to a tensioner and / or a control unit (not shown).
    Reference is now made to Figures 3 and 4. Figure 3 shows a sectional side view of such a propeller pump 1, and Figure 4 shows an enlarged part of the propeller pump shown in Figure 3.
    The propeller pump 1 according to the invention comprises an axially extending cylinder-shaped pump housing, generally designated 6, which comprises an inlet funnel 7 and a diffuser 8, which are connected to each other in an axially inboard relationship. In the embodiment shown, the inlet funnel 7 and the diffuser 8 are telescopically arranged and releasably connected by means of axially extending screws. The pump housing 6 has an inner surface 9 and further comprises an inlet opening 10 beldgen in the region of the lower end of the inlet funnel 7 and an outlet opening 11 beldgen in the region of the byre spirit of the diffuser 8. The propeller pump 1 Or 7 is arranged to be immersed in the casing 2, and thus has a slightly smaller outer diameter than an inner diameter of the casing 2. This creates a gap between an outer surface having a diffuser 8 and an inner surface of the casing 2. In order to prevent reflux of the pumped liquid down through said gap, via the space between the inner surface of the casing 2 and an outer surface the pump housing 6 is further and further to the inlet opening 10, the pump housing 6 stands on and closes tightly against a radially extending flange arranged in the casing. 2 lower dnde.
    Furthermore, the propeller pump 1 according to the invention comprises an axially extending pump core, generally designated 12, with an outer jacket surface which in radial direction is the bellows at a distance from the inner surface of the feed tube 2, since the propeller pump 1 is mounted in the feed tube 2. The pump core 12 has a guide wire. axial height which is greater than the axial height of the pump housing 6, wherein at least one axial sub-section of the pump core 12 must be surrounded by the said pump housing 6. Preferably the axial height of the pump core 12 is at least twice as axial as the axial height of the pump housing 6. In other words, the pump housing 6 and the pump core 12 are arranged overlapping each other in the axial direction, while the pump core 12 in the radial direction is located at a distance from the inner surface 9 of the pump housing 6. Preferably, the pump core 12 and the pump housing 6 are concentrically arranged in relation to each other. In addition, the propeller pump 1 according to the invention comprises at least one radially extending guide rail 13, which is connected to the inner surface 9 of the pump housing 6 and the circumferential surface of the pump core 12. Preferably, the propeller pump 1 comprises five or seven such guide rails 13, which are arranged equidistantly along the circumference of the pump core 12. See also Figure 5 which shows a plan view from above of a propeller pump according to the invention.
    The pump core 12 comprises a drive unit, generally designated 14, which comprises an electric motor 15 and a drive shaft 16 emanating from the motor, the motor 15 being directly or indirectly connected to the power supply cable 5. The drive unit 14 preferably comprises an axially extending tubular motor housing 17 with a jacket surface 18. Further, the pump core 12 comprises a hydraulic unit, generally designated 19, which comprises a propeller having a nay 20 and at least one blade 21 connected to and projecting in the radial direction from said nay 20. Said at least one blade 21 extends in the direction of the inner surface 9 of the pump housing 6, and a narrow gap separates said at least one blade 21 and the inner surface 9 of the pump housing 6. The propeller nay 20 is releasably connected to and driven in rotation by the drive shaft 16, by being fastened by means of the shown embodiment. a screw in a free lower end of the drive shaft 16 pd conventionally set. The hydraulic unit 19 is completely surrounded by the pump housing 6, i.e. the entire hydraulic unit 19 is located between the inlet opening 10 of the pump housing and the outlet skipping 11. Preferably, the propeller comprises three or four blades 21, which are equidistantly arranged along the circumference of the hub 20. See also figure 6 which shows a plan view below a propeller pump according to the invention.
    According to the exemplary embodiment shown, the pump core 12 further comprises also a sealing unit, generally designated 22, which is arranged directly downstream of the hydraulic unit 19 and directly upstream of the drive unit 14. The sealing unit 22 comprises an axially extending groove-shaped oil housing 23 and said at least one guide rail 13 , which in the embodiment shown is fixedly connected to the inner surface 9 of the pump housing 6 and a jacket surface of the oil housing 23. The sealing unit 22 is, like the hydraulic unit 19, arranged surrounded by the pump housing 6. The oil housing 23 is formed in the exemplary embodiment shown by a first, lower part 23 which is called the oil housing bottom and a second, upper part 23 "called the oil housing lid, which jointly defines a chamber 24 which houses a liquid, preferably an oil. , also known as a tat cartridge, includes an external plantatomy ng which prevents the pumped liquid from leaking into the chamber 24 of the oil housing 23, and an internal plant seal which prevents the passage of liquid between the chamber 24 of the oil housing 23 and the drive unit 14. The drive shaft take-off assembly 25 may comprise other types of said plant seals. suitable seals, and alternatively the sealing unit 22 may comprise a different type of sealing solution than said drive shaft sealing assembly. It should be noted that the drive shaft 16 thus extends through the oil housing 23 and said drive shaft sealing assembly 25, which is arranged in the grooves between the drive unit 14 and the sealing unit 22 and between the sealing unit 22 and the hydraulic unit 19, respectively.
    Furthermore, in the exemplary embodiment shown, the pump core 12 comprises a pump top, generally designated 26, in which internal power supply to the motor 15 and external power supply via the power supply cable 5 are connected. Preferably, the hydraulic unit 19, the sealing unit 22, the drive unit 14 and the pump top 26 are concentrically arranged in relation to each other. The pump top 26 preferably has a truncated conical shape, in order to minimize the occurrence of the area with rearward / negative flow velocity in the feed pipe 2 directly downstream of the pump top 26. Preferably, the pump top 26 has a double-curved circumferential surface with increasing taper in the downstream direction. Furthermore, the height of the pump tip 26 should preferably be approximately equal to 0.81.1 times the diameter of the base of the pump tip 26, and the diameter of the top of the pump tip 26 should be approximately equal to 0.4-0.7 times the diameter of the base of the pump tip 26.
    Of the parts of the pump core 12, the hydraulic unit 19 is the furthest upstream, which is said to be the inlet opening 10 of the pump housing 6. Viewed in the direction downstream of the inlet opening 10 of the pump housing 6. 23. The drive unit 14 is in turn arranged adjacent and connected to the sealing unit 22, whereupon the pump top 26 is arranged adjacent and connected to the drive unit 14. Respective interfaces between the pump top 26 and the drive unit 14, between the drive unit 14 and the sealing unit 22 and between the sealing unit 22 and hydraulic unit 19, or hydraulic chain to prevent the pumped liquid from entering and damaging the internal parts of the pump core 12, such as electronics and the motor 15.
    The propeller pump 1 according to the invention also comprises an axially extending channel 27 which extends from the inlet opening 10 of the pump housing 6 to the outlet opening 11 of the pump housing 6, which channel 27 is delimited in radial direction by the inner surface 9 of the pump housing 6 and the pump core 12, respectively. In the preferred embodiment of the propeller pump 1 shown, the said channel 27 is delimited in the radial direction of the inner surface 9 of the pump housing 6 and a 10 mantle surface has the propeller nay 20, the oil surface 23 of the oil housing 23 and the mantle surface 18 of the motor housing 17. 18 assists in delimiting said channel 27, in which the majority of the mantle surface 18 of the motor housing 17 is located axially separated by the pump housing 6. Preferably said channel 27 has an annular or toroidally shaped sub-channel which extends axially from the furthest upstream part of the nay 20 of the propeller to the outlet opening 11 of the pump housing 6. In other words, the toroidally shaped subchannel of the duct 27 rotationally symmetrical.
    Furthermore, said channel 27, viewed in an axially extending plane intersecting a center line of the propeller pump 1 in accordance with Figures 3 and 4, has a center line 28 illustrated by a dashed line in Figures 3 and 4. Various cross-sectional areas described herein have the channel 27 Or taken 25 transversely / perpendicular to the said center line 28 has the channel 27, due to the fact that the inner surface 9 of the pump housing 6 and the circumferential surface of the pump core 12 are not parallel to each other along all or even along part of the length of the channel 27. In the event that a specific cross-sectional area is fed at a point where the centerline 28 of the duct 27 has a tangent to the centerline 28 of the duct 27 or parallel to the centerline of the propeller pump 1, then this specific cross-sectional area will correspond to the area of a truncated cone surface.
    Having the propeller pump 1 according to the invention, at least three central cross-sectional areas can be met / viewed. These three central cross-sectional areas are constituted by: a cross-sectional area (AJ has the said channel 27 which is taken in the area of a rear edge 29 of the at least one blade of the propeller), a cross-sectional area (A2) has the said channel 27 which is taken in the area of a rear edge 30 has at least one guide rail 13, and a cross-sectional area (A3) 5 has said channel 27 which is taken in the area of the outlet opening 11 of the pump housing 6.
    According to the present invention, the cross-sectional area (A2) having said channel 27 in the region of said at least one guide rail 30 at least one guide rail 13 should be larger than or equal to the cross-sectional area (AI) has the channel 7 in the region of the rear edge 29 having the propeller at least one blade 21 , and further, the cross-sectional area (A2) having said channel 27 in the region of said at least one guide edge 30 of the guide rail 13 is less than or equal to a factor of 1.1 times the cross-sectional area (AI) having said channel 27 in the region of at least one blade of the propeller. 21 trailing edge 29. In other words, the following area ratio shall apply: [A1A2 1,1 * A1]. Cross-sectional area (Ad taken in the area of the trailing edge 29, the propeller has at least one blade 21 here, for example larger than 0.04 m2 and smaller than 0.11 m2.
    According to a preferred embodiment of the present invention, the cross-sectional area (A3) having the said channel 27 in the area of the outlet opening 11 of the pump housing 6 should be greater than or equal to the cross-sectional area (A2) having the channel 27 in the area of the said at least one guide rail 13, and further, the cross-sectional area (A23) has said channel 27 in the area of the outlet opening 11 of the pump housing 6 being less than or equal to a factor of 1.9 times the cross-sectional area (Ad has said channel 27 in the area of the rear edge 29 of at least one blade 21). in other words, the following area ratio should preferably apply: [A2A3 <1.9 * A1].
    According to a further more preferred embodiment of the present invention, the cross-sectional area (A2) having said channel 27 in the area of the outlet opening 11 of the pump housing 6 should be greater than a factor of 1.2 times the cross-sectional area (A2) having said channel 27 in the area of said at least one the rear edge 30 of the guide rails 13, and furthermore the cross-sectional area (A3) has the said channel 27 in the area of the outlet opening 11 of the pump housing 6 being less than a factor of 1.6 times the cross-sectional area (Ad has the said channel 27 in the area of the rear edge 29). In other words, the following area-hazardous hazard shall apply: [1,2 * A2 <A3 <1,6 * A1] In all cases, the cross-sectional area (A3) shall have the said channel 27 in the area of the outlet opening 11 of the pump housing 6 equal to a factor of 1 , 4 ginger the cross-sectional area (AJ has the said channel 27 in the area of the propeller d at least one blade 21 rear edge 29.
    According to a preferred embodiment of the present invention, the cross-sectional area (AJ has said channel 27 in the region of said at least one guide edge 30 of the guide rails 13 should be larger by a factor of 1.04 ginger the cross-sectional area (AJ has said channel 27 in the region of at least one blade 21). And further the cross-sectional area (A2) has said channel 27 in the area of said at least one guide edge 30 of the guide rails 13 being smaller. By a factor of 1.08 the cross-sectional area (AJ) has said channel 27 in the area of the rear edge of at least one blade 21. 29. In other words, the following area ratio should preferably be: [1.04 * A1 <A2 <1.08 * A1]. In all cases, the cross-sectional area (A2) should have said channel 27 in the region of said at least one guide edge 13 of the guide rails 13. Be equal to a factor of 1.06 ginger the cross-sectional area (AJ has the said channel 27 in the area of the at least one blade 21 rear edge 29 of the propeller).
    According to the preferred embodiment of the present invention shown in Figure 2, a wire 31 is connected to a lifting handle 32 which in turn is connected to the pump top 26. The wire 31 runs via the inside of the feed tube 2 up to a point of entry located above the feed tube 2, preferably 30 the extension of the wire 31 coincides with an extension of the center line of the propeller pump 1. Furthermore, the propeller pump 1 of the at least one power supply cable 5 leaves the pump top 26 and then fists to the wire 31 and runs the adjacent wire 31 up to a level above the feed pipe 2. The purpose of fitting the power supply cable 5 to the wire 31 is to of a possible, rotating velocity component of the liquid flow in the feed tube 2 and thereby risk being spun around and rib-las sander against the inner surface of the feed tube 2.
    The purpose of said at least one guide rail 13 hr to convert / redirect the rotating speed component has the liquid flow generated by the propeller during operation to a static pressure, or a pressure height, has the pumped liquid.
    Conceivable modifications of the invention The invention is not limited only to the embodiments described above and shown in the drawings, which are for illustrative and exemplary purposes only. This patent application is intended to appreciate all the adaptations and variants of the preferred embodiments described herein, and accordingly, the present invention is defined by the wording of the appended claims and their equivalents. Thus, the equipment can be modified in any conceivable way within the scope of the appended claims.
    It should be noted that the term "cross-sectional area", used in the claims as well as in the description, means that feeding of the area should take place transversely / perpendicular to a center line of the channel, due to the fact that the channel's inner boundary surface and the channel's outer boundary surface are not parallel. along the entire length of the canal.
    It should be noted that the term "in the range of", used in the requirements saval as in the description, means that area feeding takes place in a cross section has the pump housing channel that coincides with, intersects or directly adjoins, the explicit place / unit that textually follows the term " in the area of ".
    It should also be noted that all information about / moving terms such as above, below, byre, lower, etc., should be interpreted / read with the equipment oriented in accordance with the figures, with the drawings oriented in such a way that the reference numerals are read correctly.
    Thus, such terms only indicate relationships in the embodiments shown, which ratios can be changed if the inventive equipment is provided with a different construction / design.
    It should be pointed out that even if it is not explicitly stated that features from a specific design can be combined with the features in another design, this should be considered as obvious as possible.
    Throughout this specification and in the appended claims, unless the context otherwise requires, it is to be understood that the word "comprising", and variants such as "comprising" or "comprising", means including the indicated unit or step or group of units or steps but not excluding other devices or steps or groups of devices or steps.
    权利要求:
    Claims (12)
    [1]
    A propeller pump for pumping liquid, comprising: an axially extending tubular pump housing (6) having an inner surface (9) and comprising an inlet port (10) and an outlet port (11), an axially extending pump core (12) having a mantle surface, at least one axial sub-section of the pump core (12) being surrounded by said pump housing (6), and at least one radially extending guide rail (13), which is connected to the inner surface (9) of the pump housing (6) and the mantle surface of the pump core (12), wherein the pump core (6) comprises a drive unit (14) and a relatively upstream hydraulic unit (19), which comprises a propeller with a nay (20) and at least one blade (21), further comprising the propeller pump (1) an axially extending channel (27) extending from the inlet opening (10) of the pump housing (6) to the outlet opening (11) of the pump housing (6), which channel (27) is delimited in radial direction by the inner surface (9) and the inner surface (9) of the pump housing (6), respectively. the mantle surface of the pump core (12), characterized in that a cross-section The area (A2) of said channel (27) in the region of a trailing edge (30) of said at least one guide rail (13) is greater than or equal to a cross-sectional area (A1) having the channel (27) in the region of a trailing edge (29) has at least one blade (21) of the propeller, that the cross-sectional area (A2) has said channel (27) in the region of said rear edge (30) of at least one guide rail (13) is less than or equal to a factor of 1.1 times the cross-sectional area (A1) has said channel (27) in the region of at least one blade (21) trailing edge (29) of the propeller, and that the propeller pump (1) has a specific speed (nj which is greater than or equal to 200 and which is less than or equal to 300 .
    [2]
    Propeller pump according to claim 1, characterized in that a cross-sectional area (A3) has said channel (27) in the area of the outlet opening (11) of the pump housing 16 (6) greater than or equal to a cross-sectional area (A2) has the channel (27) in the area of a trailing edge (30) the said has at least one guide rail (13), and that the cross-sectional area (Ad has the said channel (27) in the area of the outlet opening (11) of the pump housing (6) is less than or equal to a factor of 1 , 9 times the cross-sectional area (Ad has the said channel (27) in the area of the rear edge (29) of at least one blade (21).
    [3]
    Propeller pump according to claim 2, characterized in that the cross-sectional area (A3) has said channel (27) in the area of the outlet opening (11) of the pump housing (6) greater than a factor of 1.2 times the cross-sectional area (A2) has said channel (27) in the area of said rear edge (30) of at least one guide rail (13), and that the cross-sectional area (A3) has said channel (27) in the area of the outlet opening (11) of the pump housing (6) less than a factor of 1.6 times the cross-sectional area (Ad has said channel (27) in the region of the rear edge (29) of at least one blade (21).
    [4]
    Propeller pump according to any one of claims 1-3, characterized in that the cross-sectional area (A2) has said channel (27) in the region of said rear edge (30) of at least one guide rail (13) larger than a factor of 1.04 times the cross-sectional area ( Ad has said channel (27) in the region of the rear edge (29) of at least one blade (21), and that the cross-sectional area (A2) has said channel (27) in the region of said rear edge (30) of at least one guide rail (13) is smaller a factor of 1.08 times the cross-sectional area (Ad has said channel (27) in the region of the rear edge (29) of at least one blade (21).
    [5]
    Propeller pump according to any one of the preceding claims, characterized in that the pump core (12) further comprises a sealing unit (22), which in turn comprises an axially extending tubular oil housing (23) and said at least one guide rail (13), which sealing unit (22) is arranged surrounded by said pump housing (6), said at least one guide rail (13) 17 hr fixedly connected to an inner surface of the pump housing (6) and a jacket surface of the oil housing (23).
    [6]
    Propeller pump according to claim 5, characterized in that the drive unit (14) comprises an axially sip-extending tubular motor housing (17) with a jacket surface (18), which drive unit (14) is connected to and arranged downstream of the tapping unit (22).
    [7]
    Propeller pump according to Claim 6, characterized in that the channel (27) of the pump housing (6) is delimited radially by the inner surface of the pump housing (6) and a jacket surface has the propeller nay (20), the jacket surface of the oil housing (23) and the jacket surface of the motor housing (17). (18).
    [8]
    Propeller pump according to one of Claims 5 to 7, characterized in that the hydraulic unit (19) is arranged adjacent and upstream of the sealing unit (22).
    [9]
    Propeller pump according to one of the preceding claims, characterized in that the pump core (12) and the pump housing (6) are arranged concentrically.
    [10]
    Propeller pump according to one of the preceding claims, characterized in that the channel (27) of the pump housing (6) has a sub-channel which extends in the axial direction from the furthest upstream part of the propeller nay (20) to the outlet opening (6) of the pump housing (6). 11), said subchannel having a toroidal shape.
    [11]
    Propeller pump according to one of the preceding claims, characterized in that the propeller comprises three blades (21), and that the propeller pump (1) comprises seven guide rails (13).
    [12]
    A pumping station for pumping liquid, comprising a propeller pump (1) according to any one of claims 1-11 and a casing 18 (2), the propeller pump (1) being arranged in a lower end of the casing (2) concentrically therewith. 1/2 /
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    同族专利:
    公开号 | 公开日
    JP6138819B2|2017-05-31|
    US9651050B2|2017-05-16|
    JP2015500441A|2015-01-05|
    WO2013090500A2|2013-06-20|
    MY178791A|2020-10-20|
    PL2791513T3|2017-04-28|
    MX342219B|2016-09-21|
    KR101962857B1|2019-07-31|
    WO2013090500A3|2013-11-14|
    US20140363273A1|2014-12-11|
    EP2791513A2|2014-10-22|
    CN104011394A|2014-08-27|
    ES2608875T3|2017-04-17|
    HK1199082A1|2015-06-19|
    KR20140102207A|2014-08-21|
    EP2791513B1|2016-09-28|
    DK2791513T3|2017-01-16|
    MX2014006202A|2014-07-14|
    SE537871C2|2015-11-03|
    CN104011394B|2016-08-24|
    AR089215A1|2014-08-06|
    BR112014014002A2|2017-06-13|
    BR112014014002B1|2021-04-06|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1151185A|SE537871C2|2011-12-13|2011-12-13|Propeller pump and pump station|SE1151185A| SE537871C2|2011-12-13|2011-12-13|Propeller pump and pump station|
    ARP120104687A| AR089215A1|2011-12-13|2012-12-12|PROPULSION PUMP AND PUMPING STATION|
    PCT/US2012/069373| WO2013090500A2|2011-12-13|2012-12-13|Propeller pump and pump station|
    PL12809937T| PL2791513T3|2011-12-13|2012-12-13|Propeller pump and pump station|
    MYPI2014001704A| MY178791A|2011-12-13|2012-12-13|Propeller pump and pump station|
    KR1020147015456A| KR101962857B1|2011-12-13|2012-12-13|Propeller pump and pump station|
    ES12809937.1T| ES2608875T3|2011-12-13|2012-12-13|Propeller pump and pumping station|
    US14/365,126| US9651050B2|2011-12-13|2012-12-13|Propeller pump and pump station|
    EP12809937.1A| EP2791513B1|2011-12-13|2012-12-13|Propeller pump and pump station|
    JP2014547401A| JP6138819B2|2011-12-13|2012-12-13|Propeller pump and pump station|
    BR112014014002-2A| BR112014014002B1|2011-12-13|2012-12-13|PROPELLER PUMP AND PUMPING STATION FOR LIQUID PUMPING|
    DK12809937.1T| DK2791513T3|2011-12-13|2012-12-13|PROPEL PUMP AND PUMP STATION|
    MX2014006202A| MX342219B|2011-12-13|2012-12-13|Propeller pump and pump station.|
    CN201280061515.1A| CN104011394B|2011-12-13|2012-12-13|Propeller pump and pumping plant|
    HK14112644.9A| HK1199082A1|2011-12-13|2014-12-17|Propeller pump and pump station|
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