瑞典专利SE0950418A1 Fluid chamber housing, method of producing a fluid chamber housing and a sealing ring intended for u

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专利摘要:

公开号:SE0950418A1
申请号:SE0950418
申请日:2009-06-08
公开日:2010-12-09
发明作者:Linus Ideskog
申请人:Berg Propulsion Technology Ab；
IPC主号:

专利说明:

PG17972EN00 2 sealing device, the surface of the white metal sealing ring may have an opposite surface of steel and these may be separated by a gap.
Theoretically, there is no or little metallic wear of the sealing rings as long as the gap between the surfaces is well lubricated. However, if physical contact occurs, for example at start-up, the white metal will wear off and there is even a risk that the white metal will wear off completely. In addition, the white metal has a low melting point and cannot withstand high temperatures. Thus, if the temperature of the layer is too high, the white metal will melt away. In addition, some of the metals that make up white metal are very dangerous and can pose a threat to both workers' health and the environment.
It is known to use sealing devices which comprise a first and second means which are movable in relation to each other and a sealing ring which is intended to seal between the means. The first member is defined as the member having an inner surface where an intended movement between the first member and the sealing ring occurs. In conventional sealing devices, the sealing ring can move relative to the first member and is immobile relative to the second member. The size of the gap between the sealing ring and the first member is then controlled by the relative distance between the first and second members. However, it has been realized that it is difficult to adjust the gap between the sealing ring and the first member, for example due to the weight of the second member.
SUMMARY OF THE INVENTION The object of the present invention is to overcome or improve at least one of the disadvantages of the prior art, or to provide a useful alternative.
Preferably, a sealing ring is provided which can withstand at least some metallic contact, e.g. at start.
Advantageously, the sealing ring works well even at high temperatures.
It is further desirable to provide a sealing ring that is not hazardous to manufacture for workers and / or the environment. It is furthermore desirable to provide a sealing ring intended for a sealing device, wherein the width of the gap between the sealing ring and the first member may be self-adjusting.
The object above can be achieved with the invention in accordance with claim 1.
According to a first aspect of the present invention, there is provided a sealing ring for providing a surface seal between a first and a second member, said first and second members being movable relative to each other. The sealing ring comprises a first ring member and a second ring member, which are connected to each other and are of different materials. The first ring member is intended to face the first member and the second ring member is intended to face the second member. By ﬂ surface is meant that the sealing ring is free to move radially relative to at least one of the first and second members. This makes the sealing ring self-adjusting.
The sealing ring can be used to seal a rotating shaft in a propulsion system, for example in a vehicle, aircraft or ship. It can also be the shaft of a wind turbine.
By a suitable choice of different materials, the sealing ring is arranged to withstand at least some metallic contact and can perform well at high temperatures. The sealing ring can also be manufactured without being dangerous to workers and / or the environment. The sealing ring can be used in a sealing device, wherein the width of the gap between the sealing ring and the first member can be self-adjusting. In one embodiment, the first ring member is located concentrically on either the inside or the outside of the second ring member. This configuration enables easy manufacturing. A suitable manufacturing method is shrink fitting, by which method the sealing ring can be manufactured without being dangerous to produce for workers and / or the environment.
Preferably, the first ring member is made of a material with suitable storage properties and / or the second ring member is made of a material with suitable mechanical and / or thermal stability. The sealing ring thus has better properties compared to a sealing ring which is made of only one of these materials.
By using a second ring member of a stabilizing material, it is possible to use bearing materials which have low thermal and / or mechanical stability, which materials would not be possible to use alone. Suitable materials for the first ring member are, for example, bearing bronze, tin bronze, lead bronze, aluminum bronze, nickel bronze, silicon bronze, brass, copper-lead alloy, cast iron or polymeric composites. Suitable materials for the second ring member are, for example, steel, titanium or titanium alloys. As an example, the first ring member may be made of bearing bronze and / or the second steel ring member.
The sealing ring may further comprise a gasket. The gasket may provide additional sealing of a gap between the sealing ring and one of the first and second means.
The gasket can be located either at the first or second ring member.
According to a second aspect of the present invention, there is provided a sealing device which comprises at least one sealing ring as described above, a first member and a second member. The first and second organs can move in relation to each other.
The sealing ring is arranged to provide a surface seal. The second member has an axial extent. The sealing ring is displaceable in a radial direction with respect to the first member. This allows self-adjustment. At least the second member is further arranged to substantially prevent the sealing ring from a rotating movement and / or a displacement along the axial direction with respect to the second member. The first member may be, for example, a rotating shaft or a sleeve while the second member may be a sleeve which is stationary relative to the external environment. Since the sealing ring is free to move radially, the width of the gap between the sealing ring and the first member is determined by their relative position. Due to the proposed configuration with a surface sealing ring, the adjustment of the gap width between the sealing ring and the first member is not dependent on the adjustment of the first member relative to the second member. The width of the gap is self-adjusting and independent of the first and second members. The first and second members may, relative to each other, be rotatable, axially displaceable or a combination thereof.
In one embodiment, the second member comprises a circumferential groove in which the sealing ring is at least partially arranged so that the sealing ring is substantially prevented from a rotating movement and / or a displacement along the axial direction (A) with respect to the second member. The sealing ring can be radially displaceable on the circumferential groove. 10 15 20 25 30 35 PG1 7972EN00 5 The sealing ring is supported by the sides of the groove which helps to hold the sealing ring in place. The circumferential groove may have a depth greater than the width of the second ring member.
The first and second means may be rotatably connected to each other by means of a connecting device, for example a bearing. The connecting device enables a rotating movement between the first and the second member, but can transmit axial movements between the members. At least one of the first and second means may comprise a sleeve. One of the organs may be a shaft. If both members are sleeves, one of the sleeves may be connected to a shaft.
The gap between the sealing ring and the first member may be fillable with a ﬂ uid.
The sealing device may further comprise a gasket. The gasket will help prevent ﬂ uid from leaking through the gap. The gasket can be located at the first member, the second member or at the sealing ring.
In a third aspect of the present invention there is provided an outer chamber housing which is intended to be mounted on a shaft which is rotatable about a shaft in a longitudinal direction of the shaft. The fluid chamber housing comprises an outer chamber which is at least partially closed by a sealing device as described above. The first and second means of the sealing device extend at least partially around the shaft, one enclosing the other, the interior of the first and second means being arranged to be mounted on the shaft. so that the interior of the first and second members is locked from rotation relative to the shaft.
If the sealing device is provided with a gap as described above, the gap may be in communication with the fluid chamber. The gap can then be filled with ﬂ uid from the ﬂ uid chamber and can thus provide appropriate sliding and / or sealing properties. Because the ﬂ uid is fed from the ﬂ uid chamber, it can be fed in a controlled manner.
The interior of the first and second means may comprise a first channel which is connectable to an inner conduit of the shaft, so that the first channel provides means for disconnection between the inner conduit and the outer chamber. The fluid can be sold to ﬂ be transferred between ﬂ the outer chamber and the inner conduit of the shaft.
The exterior of the first and second means may comprise a second channel which is connectable to an outer conduit so that the second channel provides means for ﬂ disconnection between the outer conduit and said ﬂ outer chamber. The fluid chamber can be sold filled with ﬂ uid from an external source, such as a tank.
According to a fourth aspect of the present invention, there is provided a method of making a sealing ring for providing a surface seal between a first and a second member which are movable relative to each other. The method comprises the step of shrink fitting a first ring member and a second ring member which have mutually different materials. The first ring member is intended to face the first member and the second ring member is intended to face the second member.
The method may further comprise the steps of - manufacturing the first ring member from materials with suitable storage properties such as bearing bronze, tin bronze, lead bronze, aluminum bronze, nickel bronze, silicon bronze, brass, copper lead alloy, cast iron or polymeric composites; and - manufacturing the second ring member from materials with suitable mechanical and / or thermal stability such as steel, titanium or titanium alloys.
The sealing ring thus has improved properties compared to a sealing ring which is made of only one of the materials. By using the second ring of a stabilizing material, it is possible to use bearing materials with low thermal and / or mechanical stability which materials would not have been possible to use independently.
As used herein, the term "ring member", for example as in the "first ring member", refers to a particular material member having clear boundaries compared to, for example, a coating or cladding which are usually integral with the coated or clad structure. A "ring organ" is a special self-supporting structure. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described below in greater detail by way of non-limiting example and with reference to the accompanying drawings in which: Fig. 1 is a perspective view of a sealing ring in accordance with a first aspect of the present invention. upp ﬁ nning; Fig. 2 is a schematic cross-sectional view of a sealing device according to a first embodiment of a second aspect of the present invention; Fig. 3 is a schematic cross-sectional view of a sealing device according to a second embodiment of the second aspect of the present invention; Fig. 4 is a schematic cross-sectional view of a sealing device according to a third embodiment of the second aspect of the present invention; Fig. 5 is a schematic view, partly in cross-section, of an outer chamber housing according to a first embodiment of the third aspect of the present invention; Fig. 6 is a schematic view, partly in cross section, of a fluid chamber housing according to a second embodiment of the third aspect of the present invention, and Fig. 7 is a schematic side view of a vessel provided with an adjustable propeller arrangement which comprises a fluid chamber housing according to the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The invention will be exemplified below by embodiments. It is to be understood, however, that the embodiments have been introduced to explain principles of the invention and not to limit the scope of the invention as defined by the appended claims.
Fig. 1 shows a sealing ring 2 in accordance with a first embodiment of the invention.
The sealing ring 2 comprises a first ring member 4 and a second ring member 6 of different materials. The ring members 4, 6 are connected to each other. The sealing ring 2 is intended to be used in a sealing device to provide a surface seal between a first and a second member which are movable relative to each other. The sealing ring 2 has a first curved surface 8 and a second curved surface 9. The first curved surface 8 is the surface of the first ring member 4 which is intended to face the first member. The second curved surface 9 is the surface of the second ring member 6 which is intended to face the second member.
In the exemplary embodiment, the second ring member 6 is located on and outside the first ring member 4 and in this case the first curved surface 8 is the inner curved surface of the sealing ring 2 and the second curved surface 9 is the outer curved surface.
The sealing ring can be manufactured by fitting the first ring member with the second ring member. One way to do this is to cool the smaller diameter ring member, insert it into the second ring member and then allow the smaller ring member to expand by allowing the temperature to rise. Another way is to heat the larger ring to expand it, place it around the smaller ring member and allow the outer ring member to cool and thereby contract. If desired, the manufacturing steps of cooling the smaller ring member and heating the larger ring member can be combined.
The sealing ring 2 in Fig. 1 illustrates the case when the first ring member 4 is located inside the second ring member 6. The sealing ring 2 can also be manufactured in the reverse manner, i.e. with the first ring member 4 outside the second ring member 6.
The sealing ring 2 is intended to seal between a first and a second member, as illustrated in Fig. 2, for example, which first and second members are movable relative to each other. They can be rotatably movable, axially movable or a combination of these.
The sealing ring can be used as a surface seal. By ﬂ surface is meant that the sealing ring is free to move radially relative to at least one of the first and second members. Thus, the sealing ring is self-adjusting. In use, however, the sealing ring is prevented from being moved axially and / or rotatably relative to at least one of the first and second members. It is desirable that the sealing ring 2 has both suitable mechanical and thermal stability properties as well as suitable bearing properties.
The principle of a liquid seal is further explained below in connection with Fig. 5, as well as how the sealing ring 2 can surface on an outer surface. A suitable material on the first ring member 4 is a material with suitable bearing properties, which can withstand, for example, high temperatures and direct physical contact with the first member. Desirable properties of suitable bearing materials are, for example, formability, machinability, compressive strength, low shear strength, reasonable compressive strength and fatigue strength, good thermal conductivity, a coefficient of thermal expansion similar to that of the tread and holder and compatible with the material in the holder. Examples of such materials are bearing bronze, tin bronze, lead bronze, aluminum bronze, nickel bronze, silicon bronze, brass, copper lead alloy, cast iron or polymeric composites such as polyethra-ourethylene or polyethra-ourethylene.
Suitable materials for the second ring member 6 are various kinds of alloys and materials with stable mechanical properties, for example steel, titanium or titanium alloys. The material of the second ring member 6 will help to stabilize the sealing ring 2 mechanically and / or tennis. By combining the two ring members 4, 6 of different materials, the sealing ring will have the required properties from each material. The sealing ring 2 thus has improved properties compared to a sealing ring made of only one of these materials. By using a second ring member 6 of a stabilizing material, it is possible to use bearing materials with low thermal and / or mechanical stability, which materials would not be suitable for use in themselves.
The sealing ring typically has a rectangular cross-section as in the illustrated example, but it may also have other cross-sections such as a square or a parallelepiped.
The shape of the first curved surface 8 of the first ring member 4 preferably follows the surface against which the sealing ring 2 is intended to seal. The width w1 of the first material may be up to 5% to 90%, preferably 10% to 80%, more preferably 20% to 70% of the width w of the cross-section. As an example only, it can be mentioned that for a sealing ring 2 having a diameter of 500 mm, the width w of the sealing ring may be 25 mm while the width w1 of the first material may be 7.5 mm.
The sealing ring 2 illustrated in Fig. 1 can be used in a sealing device 10 in accordance with a second aspect of the present invention. The sealing device 10 comprises at least one sealing ring 2, a first member 12 and a second member 14.
The sealing ring 2 comprises a first ring member 4 and a second ring member 6. A gap 17 is provided between the first curved surface 8 and the first member 12. The first and second members are exemplified as sleeves in Fig. 2, but one of these may be a solid 10 15 20 25 30 35 PG1 7972SE00 10 shaft for example. The first member 12 may be connected to a rotatable shaft (not shown) having a axis of rotation A which extends an axial extent of the sealing device 10. The first ring member 4 faces the first member 12, in this case the inner sleeve. The sealing ring 2 is prevented from rotatable and axially displaced relative to the second member 14 because the first member 12 is ﬂ superficial relative to the sealing ring 2, in this example rotatable and / or axially ﬂ superficial. In the illustrated example, the sealing ring 2 is partially inserted into a circumferential groove 16 in the second member 14. This will prevent the sealing ring 2 from moving axially relative to the second member 14 but leaving the sealing ring 2 free to move radially within the groove 16. The sealing ring 2 can thus "float" relative to the first 12 and second 14 member and can therefore adjust itself radially so that the width A1 of the gap 17 is controlled by placement of the sealing ring relative to the first member 12.
The possible rotatable movement between the first 12 and the second member 14 occurs between the first curved surface 8 and the outer surface of the first member 12. The sealing ring 2 is rotatably locked relative to the second member 14 in a manner which will be further described below with reference to Fig. 5. In this description, the first curved surface 8 of the ring member 4 is formed as the gripping surface because it is directed towards the movable first member 12. In Fig. 2 this movement is shown as a rotation but the movement may be rotatable, axial or a combination of these.
In use, the gap 17 may be filled with a ﬂ uid. The sealing ring 2 then runs on the surface which is formed in the gap 17, a so-called hydrodynamic bearing effect. The fluid simplifies the movement of lubricant and helps to prevent metal contact between the first member 12 and the sealing ring 2. The fluid in the gap 17 could be made thin and evenly distributed. To increase the visibility, the width of the gap 17 has been exaggerated in Figs. 2 - 6.
The groove 16 can have any depth d from practically none to substantially as deep as the cross-sectional width w of the sealing ring 2. The sealing ring 2 is intended to project from the surface of the second member 14 so that the engaging surface is formed between the sealing ring 2 and the first member 12 Since a gap can also be found in the bottom of the groove 16, the sealing ring 2 would protrude from the second member 14 even when the groove 16 is as deep as the cross-sectional width w of the sealing ring 2. The side walls 16 ', 16 "of the groove 16 will help to hold the sealing ring 2 in place. In particular, any force in the axial direction affecting the first ring member 4 would only cause a limited rotational movement of the sealing ring 2 since the sealing ring 2 is substantially held in place by the groove 16. The torsional limiting effect may occur for which depth d on the track 16 at any time but becomes clear the deeper the track is. In the illustrated embodiment of Fig. 2, the groove is quite deep with a depth d greater than the width w2 of the second annular member 6. However, there would be a torsional limiting effect even if the groove was only deep enough to extend partially along the width. w2 of the second ring member 6.
The sealing device 10 may also be arranged in the reverse order than that in Fig. 2 as illustrated in Fig. 3 where the second member 14 forms the inner sleeve. The first curved surface 8 is directed towards the first member 12, in this case the outer sleeve. A gap 17 is provided between the first curved surface 8 and the first member 12. The possible rotatable movement between the first 12 and second member 14 occurs between the first curved surface 8 and the first member 12, in this case the outer sleeve. The sealing ring 2 is inserted in a groove 16.
If more than one sealing ring is used in the sealing device 10, these may be arranged in the same manner, either with the first ring member inwards as in Fig. 2 or with the first ring member outwards as in Fig. 3 or it may be a mixture of sealing rings which are arranged inwards and outwards. In Fig. 4, a gasket 18 is arranged in a groove 19 of the first curved surface 8 of the first ring member 4 of the sealing ring 2. For reference only, the gasket 18 may be made of rubber or plastic. The intention is to provide a tight seal between the sealing ring 2 and the first member 12 so that a possible ﬂ uid is prevented from leaking through the gap.
Fig. 5 shows an outer chamber housing 20 extending circumferentially on a rotatable shaft 30 (partially indicated). The fluid chamber housing 20 includes a fluid chamber 22 which is closed by a sealing device 10 as described above. In this case, the sealing device comprises two sealing rings 2. The sealing rings 2 are partially inserted into circumferentially extending grooves 24, 26 in the second member 14. The grooves 24, 26 have inner side walls 23, 23 'and outer side walls 25, 25 ". The fluid chamber 22 is annular and defined by the two sealing rings 2 and a part of the outer wall of the first member 12 and the part 10 'of the inner wall of the second member 14. The fluid chamber housing 20 is mounted on the rotatable shaft 30, for example a drive shaft, where the first member 12 is attached to the shaft 30 so that the first member 12 will rotate with the shaft 30. The second member 14 and the sealing rings 2 are rotatably stationary relative to the shaft 30.
The first 12 and the second member 14 are fixedly rotatably connected to each other by means of a connecting device 27. By fixed rotatable is meant that the first 12 and the second 14 members are fixedly connected to each other by means of a connection which allows mutual rotation but which prevents mutual axial and radial displacement. A suitable connection is an axial bearing, i.e. a bearing device which is arranged to transmit displacement in the axial direction A between the first 12 and second 14 means. For this purpose, the thrust bearing 27 is connected to the second member 14 by means of a groove 28 and the thrust bearing 27 is connected to the first member by means of a circumferentially extending abutment surface 28 'and a bolt joint 29. In other embodiments of the present invention, however, the connecting device may be so that the first member 12 is provided with the groove and the second member with the abutment surface and the bolt joint (not shown). By way of example only, the thrust bearing 27 may be double row conical roller bearing (not shown).
A gap 17 is provided between the first curved surface 8 of the sealing rings and the first member 12. The width A1 of the gap 17 is controlled by the position of the sealing ring 2 relative to the first member 12. In addition, the extension in the radial direction of the connecting device 27 will control the relative radial the distance between the first 12 and the second 14 means. If the sealing ring 2 settles deep in the grooves 24, 26, i.e. they have a small clamp A2, the gap width A1 will be relatively large. If the sealing ring is inserted to a lesser extent in the grooves 24, 26 and thus has a slightly larger clamp A2, the gap width A1 will be relatively small. The clamp A2 is often larger than the gap width A1. The sealing ring 2 is used to adjust the width A1 of the gap 17, which width thus becomes self-adjusting. This can be compared with a traditional device of a chamber housing in which the sealing ring is fixedly connected to the second member and the width A1 of the gap 17 is determined by adjusting the relative positions of the first 12 and second 14 members. The self-adjustment is facilitated by the fact that the sealing ring 2 weighs much less than the second member 14. Although the principle of a liquid seal is described for an outer chamber housing, it can be used in other sealing devices comprising sealing rings in accordance with the invention, for example sealing devices shown in Figs. 2, 3, 4 and 6.
Column 17 is fillable with ﬂ uid from ﬂ uid chamber 22. Thus, ﬂ uid chamber and column 17 are in ﬂ uid connection. In the illustrated case, both sealing rings have the same width A1 of the gap 17, but the gap width A1 can also differ between the sealing rings 2.
The width A1 of the gap 17 is preferably adjusted so that when an ﬂ expression has been built up in the chamber 22, a portion will enter the gap 17 so that an ﬁ uid m lm (not shown) is formed between the sealing rings 2 and the first member 12, which ﬂ uid ﬁ lm provides a sliding contact between the sealing rings 2 and the first member 12. However, the gap width A1 is small enough to prevent - or at least substantially reduce - an outflow from the chamber 22 to the environment around the sealing rings 2. To achieve the properties of the sliding arrangement 10, the gap width A1 is preferably in the range 0, 0001 to 0.0003 times the diameter of the drive shaft, the diameter of the shaft 30 being measured at a portion of the shaft arranged to receive the inner sleeve. By way of example only, if the diameter of the shaft is 500 mm, the gap width A1 may preferably be in the range 0.07 to 0.11 mm. With the sealing device and the discharge chamber according to the present invention, the gap formed in the gap 17 can become thinner and more evenly distributed in comparison with a traditional sealing device without "surface seals" where the gap is thicker. A thicker lm would in this case result in a higher id uid de fate from the chamber 22 to the environment compared to the uptake.
By using a chamber housing 20 with sealing rings 2 in accordance with the invention, it is possible to have a gap width A1 which is less sensitive to high temperatures compared with traditional sealing rings.
Since the sealing rings are self-adjusting, there is a radial clearance A2 between the sealing rings 2 and the bottom of the grooves 24, 26. In the illustrated case, both sealing rings have the same radial clearance A2 but the radial clearance can also differ between the sealing rings 2. The sealing rings 2 seal against at least one of the side walls of the grooves. Since the fluid pressure tends to push the sealing rings 2 in the outward direction from the outer chamber 22, each of the sealing rings 2 will abut against the outer side walls 25, 25 'of the grooves 24, 26 which results in a solid being prevented from passing between the sealing rings 2 and the other. means 14 For this purpose, the sealing device 10 may comprise a further sealing member (not shown) such as a rubber gasket (not shown) between each of the sealing rings 2 and the second member 14. In addition, a contact pressure to be built up between each of the rings 2 and the second member 14 which in turn results in frictional forces between the sealing rings 2 and the second member 14, which forces prevent rotation of the sealing rings relative to the second member 14. Such frictional forces can be further strengthened of the additional rubber gasket (not shown) or the like.
The sealing rings 2 may comprise a gasket 18 as illustrated in Fig. 4 (not shown in Fig. 5) intended to prevent any leakage through the gap 17.
In addition, the fluid pressure from the outlet chamber 22 will tend to cause a rotational movement of the sealing rings 2, but the side walls 23, 232 25, 25 'of the grooves 24, 26 will limit this movement. The deeper the grooves 24, 26, the more the rotational movement is prevented. In the illustrated embodiment in Fig. 5, the grooves 24, 26 are quite deep with a depth d of the groove which is wider than the width w2 of the second ring member 6, but less deep grooves can also function.
By using a rounded geometry (not shown) for the part 22 'of the inner wall of the second member 14 defining the outer chamber 22, the outer chamber 22 could have a larger volume compared to a flat portion 22' of the inner wall, which could improve the distribution of the outside and at the same time provide an appropriate support for the sealing rings 2. The inner side walls 23, 23 'may extend a shorter distance than the outer side walls 25, 252. The first member 12 comprises a first channel 32 which is connectable to a inner conduit 34 within the shaft 30. The first channel 32 provides means for id disconnection between the inner conduit 34 and the id chamber 22. The first channel 32 is arranged to rotate with the shaft 30.
The second member comprises a second channel 36 which is connectable to an outer conduit 38. The second channel 36 provides means for ﬂ disconnection between the outer conduit 38 and the id chamber 22. The shaft 30 is rotatably movable relative to the second channel 36. In general, the second channel 36 is stationary with respect to the surrounding environment because the shaft 30 is arranged to rotate with respect to the environment. In addition, the first channel 32 and the second channel 36 are connected to each other via the connecting device so that an axial displacement, in the direction of the shaft 30, of the first channel 32 is passed on to the second channel 36.
Via the first channel 32, the outer chamber 22 and the second channel 36, there are means for the connection between the inner line 34 and the outer line 38. Since at least one purpose of the outer surface is to lubricate, the outer surface preferably has suitable lubricating properties. By way of example only, ﬂ uiden may be oil, such as mineral, synthetic or vegetable oil. The first channel 36 is usually connected to a source (not shown) via the outer conduit 38, such as a tank (not shown), with the above-mentioned fluid.
By way of example only, the first and second members 12, 14 may be sleeves made of cast iron. The inner sleeve may be fixedly connected to the inner conduit 34, for example by means of a joint such as a bolt, weld, screw, bolt or adhesive joint (not shown).
Fig. 6 illustrates two fluid chambers 22 next to each other, both outer chambers being delimited by the same first 12 and second 14 means. The sealing rings 2 are arranged on the outside as previously described with reference to Fig. 3. Each outer chamber 22 has its own channels and conduits in the same manner as previously described with reference to Fig. 5.
With the construction of a sealing device or an outer chamber housing according to the invention, and exemplified by Figs. 5 and 6, it is possible to surface the entire sealing device or the outer chamber housing in one piece in the axial direction of the shaft 30 and at the same time have the possibility of allowing a relative rotation between the first and second means 12, 14.
The shaft 30 indicated in Figs. 5 and 6 may be a drive shaft of a propulsion system, for example in a vehicle, plane or ship. It can also be the shaft of a wind turbine.
The shaft can be horizontal or vertical or can have any angle.
Fig. 7 illustrates an adjustable propeller system 40 of a vessel 42.
The propulsion system comprises a shaft 30 with an axial direction A and an adjustable propeller 44 coupled to the drive shaft 30. The adjustable propeller 44 comprises at least one propeller blade, in the embodiment shown in Fig. 7, the propeller includes four blades of which three 46, 48, 50 are visible. However, other designs of propellers with or less propeller blades may also be used with the propeller arrangement of the present invention. Furthermore, in certain applications the vessels 42 may be provided with one or more adjustable propeller arrangements 40.
Furthermore, Fig. 7 illustrates that the vessels 42 include an engine 52 which is generally coupled to the drive shaft 30 via a gear 54. The gear 54 is optional and the drive shaft 30 may instead be directly driven by the engine, in which case preferably by an engine having an rpm , revolutions per minute. In addition, a part of a distribution system is schematically illustrated by an output chamber housing 20 as described above, which partially encloses the drive shaft 30. In Fig. 7, the output chamber housing 20 is in a preferred location of the propeller arrangement 40, namely around the drive shaft 30 and between the gear 54 and the propeller 44. However, in other embodiments of the distribution system of the present invention, the fluid chamber housing 20 may be located at other locations of the propeller arrangement 40.
For example, the fluid chamber housing 20 may be on an extension of the drive shaft 30 which extends through the gear 54 so that the outer chamber housing 20 is located on the opposite side of the gear 54 than the propeller 44. This alternative location is indicated by a dotted line in Fig. 7.
It should be noted that the drive shaft 30 does not necessarily have to be integral. In practice, the drive shaft 30 can be constituted by a number of shaft parts which are connected to each other to form the complete drive shaft 30.
The invention has been described above by way of example only and the person skilled in the art will realize that many modifications of the above-mentioned embodiments are possible within the scope of the appended claims.
The shape of the sealing ring 2 is preferably arranged to fit the circumference of the object to which it is to seal. The illustrated embodiments in Figs. 1-7 show examples of annular sealing rings, but the sealing rings may have other shapes, for example for a shaft having a non-circular cross section.

权利要求:
Claims (1)
[1]
A patent housing housing (20) which is intended to be mounted on a shaft (30), said shaft (30) being rotatable about a shaft in a longitudinal direction (L) of said shaft. (30), wherein said outer chamber housing (20) comprises a fluid chamber (22) which is at least partially closed by a sealing device (10) which comprises a sealing ring (2) and a first and second means (12, 14), characterized in that said first and second means (12, 14) of said sealing device (10) are arranged to extend at least partially around said shaft (30), one enclosing the other, the interior of said first and second means (12, 14) is locked from rotation relative to said shaft (30), said second member (14) having an axial extent (A), said sealing ring (2) being arranged to provide a surface seal between said first member (12) and said second means (14), said sealing ring (2) being displaceable in a radial direction with respect to said first means (12), wherein at least said second means (14) is further arranged to substantially prevent said sealing ring (2) from a rotating movement and / or an displacement along said axial direction (A) with said second means (14), said sealing ring (2) comprising a first ring means (4) and a second ring means (6), said first ring means (4) and said second ring means (6) being connected to each other and being of different materials, said first ring means (4) being intended to face said first means (12) and said second ring means (6) being intended to face said second means (14). The fluid chamber housing (20) according to claim 1, wherein said first ring means (4) is located concentrically on either the inside or the outside of said second ring means (6). The fluid chamber housing (20) according to any one of the preceding claims, wherein said first ring means (4) and said second ring means (6) are connected to each other by means of shrink fitting. The fluid chamber housing (20) according to any one of the preceding claims, wherein said first ring member (4) is made of a material with suitable storage properties such as bearing bronze, tin bronze, lead bronze, aluminum bronze, nickel bronze, silicon bronze, brass, copper lead alloy, cast iron or polymeric composites. PG17972EN00 10. 11 12. The fluid chamber housing (20) according to any one of the preceding claims, wherein said second ring member (6) is made of a material with suitable mechanical and / or thermal stability such as steel, titanium or titanium alloys. . The fluid chamber housing (20) according to any one of the preceding claims, wherein the sealing ring further comprises a gasket (18). The fluid chamber housing (20) according to any one of the preceding claims, wherein said second means (14) comprises a circumferential groove (16, 24, 26) in which said sealing ring (2) is at least partially arranged so that said sealing ring (2) is substantially prevented from rotary movement and / or an displacement along said axial direction (A) with respect to said second means (14). The fluid chamber housing (20) according to claim 7, wherein said sealing ring (2) is radially displaceable said circumferential groove (16, 24, 26). The fluid chamber housing (20) according to claim 7 or 8, wherein said circumferential groove (16, 24, 26) has a depth (d) greater than the width (w2) of said second annular member (6). The fluid chamber housing (20) according to any one of the preceding claims, wherein said first and second means (12, 14) are rotatably connected to each other by means of a connecting device (27). . The fluid chamber housing (20) according to any one of the preceding claims, wherein at least one of said first (12) and second (14) means comprises a sleeve. The fluid chamber housing (20) according to any one of the preceding claims, wherein the sealing device further comprises a gasket (18). The fluid chamber housing (20) according to any one of the preceding claims, wherein a gap (17) between said sealing ring (2) and said first means (12) is in communication with said chamber (22). PG1 79728 E00 14. 15. 16. 17. 18. The fluid chamber housing (20) according to any one of the preceding claims, wherein the interior of said first and second means (12, 14) comprises a first channel (32) which is connectable to an inner conduit (34) of said shaft (30) so as to thereby obtain a ﬂ connection between said inner conduit (34) and said id outlet chamber (22). The fluid chamber housing (20) according to any one of the preceding claims, wherein the exterior of said first and second means (12, 14) comprises a second channel (36), said second channel (36) being connectable to an outer conduit (38) for thereby obtaining a fluid connection between said outer conduit (38) and said outer chamber (22). A method of manufacturing an outer chamber housing (20) according to any one of the preceding claims, characterized in that the method comprises the step of manufacturing said sealing ring (2) by fitting a first ring member (4) and a second ring member (6) which have mutually different materials, wherein said first ring means (4) is intended to face said first means (12) and said second ring means (6) is intended to face said second means (14). The method of claim 16, wherein the method further comprises the steps of: manufacturing said first ring means (4) from materials with suitable storage properties such as bearing bronze, tin bronze, lead bronze, aluminum bronze, nickel bronze, silicon bronze, brass, copper lead alloy, cast iron or polymeric composites; and manufacturing said first ring means (6) from materials with suitable mechanical and / or thermal stability such as steel, titanium or titanium alloys. A sealing ring (2) intended for use in an outer chamber housing (20) according to any one of claims 1 to 15, characterized in that said sealing ring (2) comprises a first ring member (4) and a second ring member (6), said first ring member (6) 4) and said second ring means (6) are connected to each other and are of different materials, said first ring means (4) being intended to face said first means (12) and said second ring means (6) being intended to face against said other means (14). The use of a sealing ring (2) in an outer chamber housing (20) according to any one of claims 1 to 15, characterized in that said sealing ring (2) comprises a first ring member (4) and a second ring member (6), said first ring means (4) and said second ring means (6) are connected to each other and are of different materials, said first ring means (4) being intended to face said first means (12) and said second ring means (6) being intended to be facing said second means (14).

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同族专利:

公开号 | 公开日

WO2010144040A1|2010-12-16|

SE533918C2|2011-03-01|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

US5014999A|1989-03-06|1991-05-14|Car-Graph, Inc.|Pressure enhanced self aligning seal|

GB2254116B|1991-03-29|1995-01-18|Rexnord Corp|Shaft seal assemblies|

US20050189720A1|2004-02-27|2005-09-01|R & D Dynamics Corporation|Dynamic seal for use in high-speed turbomachinery|US10344842B2|2015-04-06|2019-07-09|GM Global Technology Operations LLC|Multi-piece sealing assembly|

法律状态:
2018-01-30| NUG| Patent has lapsed|

优先权:

申请号 | 申请日 | 专利标题

SE0950418A|SE533918C2|2009-06-08|2009-06-08|Fluid chamber housing, method of producing a fluid chamber housing and a sealing ring intended for use in such a fluid chamber housing|SE0950418A| SE533918C2|2009-06-08|2009-06-08|Fluid chamber housing, method of producing a fluid chamber housing and a sealing ring intended for use in such a fluid chamber housing|

PCT/SE2010/050632| WO2010144040A1|2009-06-08|2010-06-08|Seal ring|

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