Bearing assembly and wind generating set

Abstract

The invention provides a bearing assembly and a wind generating set. The bearing assembly comprises a bearing seat, a plurality of bearing bushes, a plurality of gaskets and a circumferential limiting part, and the bearing seat is provided with a bearing containing cavity; the multiple bearing bushes are arranged in the bearing containing cavity at intervals in the circumferential direction of the bearing containing cavity. Each gasket is correspondingly arranged between the radial outer surface of the bearing bush and the inner side wall of the bearing accommodating cavity, each gasket is provided with a pin hole, the radial outer surface of the bearing bush is provided with a gasket positioning pin, and the gasket positioning pins are arranged in the pin holes; the circumferential limiting part is arranged on the inner side wall of the bearing containing cavity and limits the bearing bush, when the bearing bush slides relative to the bearing seat in the circumferential direction of the main shaft, the liner and the bearing bush can move synchronously, the liner and the bearing bush are prevented from relatively moving in the circumferential direction or the axial direction of the main shaft, and therefore the liner positioning pin is prevented from bearing shear force, and the service life of the liner positioning pin is prolonged. And the service life of the gasket positioning pin is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of wind power generation, and in particular relates to a bearing assembly and a wind power generator set. Background Art

[0002] With the development of the wind power industry and the advent of the era of wind power parity, the capacity of the unit has continued to increase, which has put forward higher requirements on the load-bearing capacity of the main bearing. At present, the main bearing usually bears the torque caused by the rotation of the main shaft. With the promotion of large-megawatt units, sliding bearings have advantages over rolling bearings in terms of cost, load and life, so the use of sliding bearings for main bearings has become a development trend. However, the existing sliding bearing structure usually includes multiple bearings connected to the bearing seat by a pin shaft. During the operation of the unit, due to the effect of wind load, the bearing of the sliding bearing will generate circumferential shear force when the main shaft rotates, which can easily cause the pin shaft to deform or break, and then cause the bearing to move out of place and the main shaft to move downward. Summary of the invention

[0003] The main purpose of the present disclosure is to provide a bearing assembly and a wind turbine generator set to increase the service life of the bearing assembly.

[0004] In view of the above objectives, the present disclosure provides the following technical solutions:

[0005] One aspect of the present disclosure provides a bearing assembly, which includes a bearing seat, a plurality of bearing shells, a plurality of gaskets and a circumferential limiting portion, wherein the bearing seat has a bearing accommodating cavity; the plurality of bearing shells are arranged in the bearing accommodating cavity at intervals along the circumferential direction of the bearing accommodating cavity; each gasket is respectively and correspondingly arranged between the radial outer surface of the bearing shell and the inner side wall of the bearing accommodating cavity, the gasket is provided with a pin hole, and a gasket positioning pin is provided on the radial outer surface of the bearing shell, and the gasket positioning pin is arranged in the pin hole; the circumferential limiting portion is arranged on the inner side wall of the bearing accommodating cavity to limit the bearing shell.

[0006] When the bearing assembly provided by the present invention slides relative to the bearing seat along the circumferential direction of the main shaft, the liner and the bearing can move synchronously, avoiding relative movement of the liner and the bearing along the circumferential or axial direction of the main shaft, thereby avoiding the liner locating pin from being subjected to shear force, thereby increasing the service life of the liner locating pin and thus increasing the service life of the bearing assembly.

[0007] An exemplary embodiment of the present disclosure is that a predetermined gap is formed between the gasket locating pin and the inner wall of the bearing accommodating cavity, the gasket locating pin extends radially along the bearing accommodating cavity, and the radial outer end of the gasket locating pin is provided with an arc-shaped end surface; and / or a predetermined gap is formed between the gasket locating pin and the inner wall of the bearing accommodating cavity, the pin hole comprises a first hole section and a second hole section which are interconnected, in the radial direction of the bearing accommodating cavity, the first hole section is located radially outside the second hole section, the aperture of the first hole section is larger than the aperture of the second hole section, and the gasket locating pin extends into the first hole section.

[0008] In this embodiment, the pin hole is arranged as a stepped hole, the first hole section is located radially outside the second hole section and the hole diameter of the first hole section is larger than the hole diameter of the second hole section, and the hole diameter at the radial outer end of the liner locating pin is larger to avoid the radial outer end of the liner locating pin contacting the liner and causing scratches on the liner, thereby improving the service life of the liner, thereby improving the service life of the bearing assembly.

[0009] Optionally, a gasket receiving groove is formed on the inner wall of the bearing accommodating cavity, the gasket is arranged in the gasket receiving groove, and the gasket protrudes toward the bearing shell relative to the gasket receiving groove to fit with the bearing shell, so that the bearing shell and the bearing seat are radially spaced along the bearing accommodating cavity. When the bearing shell will make an eccentric motion relative to the bearing seat with the gasket locating pin as a fulcrum and the gasket is squeezed by the bearing shell and deformed, interference between the movement of the bearing shell and the bearing seat is avoided, thereby improving the reliability of the bearing assembly.

[0010] Specifically, in the circumferential direction of the bearing accommodating cavity, the gap L1 between the bearing shell and the circumferential limit portion is smaller than the gap L2 between the liner and the circumferential side wall of the liner accommodating groove. In this way, when the bearing shell slides relative to the bearing seat along the circumference of the main shaft, the bearing shell contacts the circumferential limit portion and stops sliding, and the liner does not contact the circumferential side wall of the liner accommodating groove at this time, that is, when the bearing shell slides along the circumference of the main shaft, the liner moves synchronously with the bearing shell, and the gap between the liner and the side wall of the liner accommodating groove is still maintained, thereby avoiding the liner positioning pin from being subjected to shear force, and thus improving the service life of the liner positioning pin.

[0011] Furthermore, the circumferential limiting portion includes limiting pins arranged on both circumferential sides of the bearing shell, and the limiting pin has a pin limiting surface on the side facing the bearing shell. The present disclosure reduces the manufacturing difficulty of the bearing seat by using the limiting pin as the circumferential limiting portion, thereby reducing the manufacturing cost of the bearing assembly.

[0012] In another exemplary embodiment of the present disclosure, the bearing seat comprises a bearing seat body and a seat body protrusion, the bearing accommodating cavity is formed on the bearing seat body, the seat body protrusion is arranged in the bearing accommodating cavity, and the seat body protrusion is arranged to protrude toward the bearing shell relative to the bearing accommodating cavity, and the liner accommodating groove is formed on the seat body protrusion. In this way, since the liner accommodating groove is small in size, it is processed outside the bearing seat, which reduces the difficulty of processing the liner accommodating groove, thereby reducing the manufacturing cost of the bearing seat.

[0013] Optionally, the circumferential limiting portion includes a bearing shell limiting groove recessed from the inner side wall of the bearing accommodating cavity, and the bearing shell limiting groove has a limiting surface on the side facing the bearing shell, and the limiting surface can match the bearing shell, so that when the bearing shell contacts the circumferential limiting portion, there is surface contact between the two, thereby increasing the contact area, improving the shear resistance of the bearing assembly, and thus improving the reliability of the bearing assembly.

[0014] Specifically, the bearing shell further comprises a bearing shell body and a bearing shell boss, the bearing shell boss protrudes from the radial outer surface of the bearing shell body, the bearing shell limiting groove comprises a first limiting groove, the first limiting groove is arranged on both sides of the bearing shell boss along the circumferential direction of the bearing accommodating cavity, the bearing shell boss is inserted into the first limiting groove, a first limiting surface is arranged on the side of the first limiting groove facing the bearing shell boss, and there is a gap between the radial outer surface of the bearing shell body and the inner side wall of the bearing accommodating cavity. In this embodiment, the bearing shell is limited along the circumferential direction of the bearing accommodating cavity by the cooperation of the first limiting groove and the bearing shell boss.

[0015] In another exemplary embodiment of the present disclosure, the bearing bush limiting groove further includes a second limiting groove, the second limiting groove is arranged on both sides of the bearing bush body along the circumferential direction of the bearing accommodating cavity, the bearing bush body is inserted into the second limiting groove, and a second limiting surface is arranged on the side of the second limiting groove facing the bearing bush body. In this embodiment, the first limiting groove cooperates with the bearing bush boss and the second limiting groove cooperates with the bearing bush body, thereby realizing the limiting of different parts of the bearing bush and improving the operating reliability of the bearing assembly.

[0016] Optionally, the first limiting groove forms the gasket receiving groove, the gasket locating pin is arranged on the radial outer surface of the bearing boss, the gasket is arranged in the first limiting groove, and the bearing boss is inserted into the first limiting groove, the gasket is located between the bearing boss and the bottom wall of the gasket receiving groove, and there is a gap between the radial outer surface of the bearing body and the groove bottom of the second limiting groove. The present disclosure forms the gasket receiving groove through the first limiting groove to reduce the number of slots of the bearing seat, thereby reducing the processing cost of the bearing seat.

[0017] Specifically, the circumferential limiting portion includes a seat body protrusion protruding from the inner side wall of the bearing accommodating cavity, a limiting groove is formed on the radial outer surface of the bearing shell, the seat body protrusion is inserted into the limiting groove, and a limiting surface is provided on one side of the seat body protrusion facing the limiting groove. In this embodiment, the limiting grooves are provided on both sides of the seat body protrusion along the circumferential direction of the bearing accommodating cavity, and the seat body protrusion is inserted into the limiting groove, so that the seat body protrusion limits the bearing shell along the circumferential direction of the bearing accommodating cavity.

[0018] Furthermore, the gasket locating pin is formed on the bottom surface of the limiting groove, the gasket accommodating groove is formed on the radial inner surface of the seat body protrusion, and the gasket protrudes a predetermined height relative to the limiting groove. When the bearing shell swings relative to the bearing seat with the gasket locating pin as a fulcrum, the bearing shell is prevented from contacting and colliding with the bearing seat and being damaged, thereby improving the service life of the bearing assembly.

[0019] In another aspect of the present disclosure, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the bearing assembly as described above.

[0020] The bearing assembly and wind turbine generator set provided by the present invention have at least the following beneficial effects: in the bearing assembly provided by the present invention, when the bearing shell slips relative to the bearing seat along the circumferential direction of the main shaft, the bearing shell contacts the circumferential limit portion and stops sliding, and at this time, the gasket does not contact the circumferential side wall of the gasket accommodating groove, that is, when the bearing shell slips along the circumferential direction of the main shaft, the gasket and the bearing shell can move synchronously, avoiding relative movement of the gasket and the bearing shell along the circumferential or axial direction of the main shaft, thereby avoiding the gasket locating pin from being subjected to shear force, and thus improving the service life of the gasket locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A perspective view of a bearing assembly is provided for a first exemplary embodiment of the present disclosure.

[0023] Figure 2 for Figure 1 Cross-section of the middle bearing assembly.

[0024] Figure 3 for Figure 2 A partial enlarged view of the structure indicated by circle I.

[0025] Figure 4 for Figure 2 A partial enlarged view of the structure indicated by circle J in the middle.

[0026] Figure 5 A perspective view of a bearing assembly is provided for a second exemplary embodiment of the present disclosure.

[0027] Figure 6 for Figure 5 Cross-section of the middle bearing assembly.

[0028] Figure 7 for Figure 6 A partial enlarged view of the structure indicated by circle K in the middle.

[0029] Figure 8 A cross-sectional view of a bearing assembly is provided for a third exemplary embodiment of the present disclosure.

[0030] Fig. 9 for Figure 8 Cross-section of the middle bearing assembly.

[0031] Fig.10 for Fig. 9 A partial enlarged view of the structure indicated by circle M in the middle.

[0032] Description of reference numerals:

[0033] 1. Bearing seat; 2. Bearing unit;

[0034] 3. Circumferential limiting portion; 11. Gasket receiving groove;

[0035] 12. Bearing seat body; 13. Seat body protrusion;

[0036] 14. Seat receiving groove; 21. Bearing bush;

[0037] 22. Gasket; 31. Pin limit surface;

[0038] 32. First limiting groove; 33. Second limiting groove;

[0039] 211, liner positioning pin; 212, bearing body;

[0040] 213, bearing boss; 214, limiting groove;

[0041] 221. Pin hole. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present disclosure is limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0043] Reference Figures 1 to 10The present disclosure provides a bearing assembly that can be applied to a wind turbine generator set. For example, but not limited to, the bearing assembly can be used to support the main shaft of the wind turbine generator set. As an example, the bearing assembly in this embodiment can be a sliding bearing assembly, but it is not limited to this. For the convenience of description, the present disclosure will be described by taking the bearing assembly used to support the main shaft of the wind turbine generator set as an example, but it is not limited to this.

[0044] The bearing assembly includes a bearing seat 1, multiple bearing shells 21, multiple gaskets 22 and a circumferential limiting portion 3. The bearing seat 1 has a bearing accommodating cavity. Multiple bearing shells 21 are arranged in the bearing accommodating cavity at intervals along the circumferential direction of the bearing accommodating cavity. Each gasket 22 is respectively and correspondingly arranged between the radial outer surface of the bearing shell 21 and the inner side wall of the bearing accommodating cavity. The circumferential limiting portion 3 is arranged on the inner side wall of the bearing accommodating cavity for limiting the bearing shell 21. The gasket 22 is provided with a pin hole 221. A gasket positioning pin 211 is provided on the radial outer surface of the bearing shell 21. The gasket positioning pin 211 is arranged in the pin hole 221.

[0045] In this embodiment, the bearing shell 21 and the liner 22 can constitute a bearing shell unit 2, which is arranged between the bearing seat 1 and the main shaft. The rotation of the main shaft is supported by the bearing shell unit 2 to provide a thrust load for the main shaft to resist the wind load, suppress the vibration of the main shaft, and make the operation of the wind turbine generator set more stable and reliable. In this embodiment, the liner 22 has a predetermined elasticity. In the initial state, the liner 22 can be pre-compressed and arranged on the side of the bearing shell 21 facing away from the main shaft, so that the liner 22 can support the bearing shell 21 so that the bearing shell 21 supports the rotation of the main shaft, thereby increasing the contact area between the bearing shell 21 and the main shaft, and improving the reliability of the bearing assembly.

[0046] When the external wind load changes suddenly, the magnitude and direction of the load transmitted to the main shaft by the impeller may change. When the direction of the wind load changes, the liner 22 is deformed under the extrusion of the bearing shell 21. The liner 22 is elastic and pushes the bearing shell 21 toward the main shaft under the action of the elastic restoring force, so that the bearing shell 21 can adjust its direction to support the rotation of the main shaft, so that the bearing shell 21 provides thrust load for the main shaft to suppress the change of wind load, thereby improving the vibration resistance of the bearing assembly.

[0047] As an example, the rigidity of the gasket 22 is less than the rigidity of the bearing shell 21. For example but not limited to, the gasket 22 may be a disc spring or a spring.

[0048] In this embodiment, the bearing 21 and the gasket 22 correspond one to one, and the radial gasket 22 along the main shaft is arranged on the radial outer side of the bearing 21. The bearing 21 is provided with a supporting surface that can match the side wall of the main shaft, and the gasket 22 is arranged on the side of the bearing 21 that is away from the supporting surface. The gasket 22 can support the bearing 21 so that the supporting surface can support the rotation of the main shaft, thereby improving the vibration resistance of the bearing assembly, thereby making the wind turbine generator set run more smoothly, but not limited to this.

[0049] In order to improve the reliability of the bearing unit 2, the liner 22 is provided with a pin hole 221, and the radial outer surface of the bearing 21 is provided with a liner positioning pin 211, which is arranged in the pin hole 221. The liner positioning pin 211 allows the liner 22 to be reliably connected to the bearing 21, and avoids the liner 22 from moving relative to the bearing 21, thereby improving the reliability of the bearing unit 2. Further, in this embodiment, the liner 22 is connected to the bearing 21 through the liner positioning pin 211. When the wind load direction suddenly changes, the thrust load of the bearing 21 on the main shaft changes. At this time, the liner 22 and the bearing 21 move differently, for example but not limited to, the bearing 21 can slide relative to the bearing seat 1 along the circumference and / or radial direction of the main shaft by a predetermined distance. Since the liner 22 and the bearing 21 move synchronously, the liner positioning pin 211 is prevented from bearing the shear force along the circumference of the main shaft, thereby improving the service life of the liner positioning pin 211, and also improving the service life of the bearing unit 2.

[0050] In the embodiment provided by the present invention, the liner locating pin 211 is connected between the liner 22 and the bearing shell 21, and is not connected to the bearing seat 1, so that the bearing shell unit 2 is movably connected to the bearing seat 1. When the external wind load changes suddenly, the bearing shell unit 2 is allowed to slide a predetermined distance relative to the bearing seat 1, so that the lubricating oil can fully contact the main shaft, avoiding friction damage between the bearing shell unit 2 and the main shaft, thereby increasing the service life of the bearing assembly, but not limited to this.

[0051] In order to further improve the service life of the bearing assembly, a predetermined gap is provided between the liner positioning pin 211 and the inner wall of the bearing accommodating cavity, such as Figure 4 As shown, in this embodiment, the gasket locating pin 211 extends radially along the main shaft, that is, extends radially outward from the bearing shell 21 along the bearing accommodating cavity, and the radial outer end of the gasket locating pin 211 is spaced apart from the bearing seat 1 to set a predetermined gap between the gasket locating pin 211 and the bearing seat 1.

[0052] When the bearing shell 21 slides relative to the bearing seat 1, the liner 22 is deformed due to the uneven extrusion pressure of the bearing shell 21. When a predetermined gap is set between the liner locating pin 211 and the bearing seat 1, during the sliding of the bearing shell 21 relative to the bearing seat 1, the bearing shell 21 will make a pendulum motion relative to the bearing seat 1 with the liner locating pin 211 as a fulcrum. At this time, the radial outer end of the liner locating pin 211 will pendulum relative to the bearing seat 1, and the radial outer end of the liner locating pin 211 is spaced apart from the bearing seat 1, so that the liner locating pin 211 will not touch the bearing seat 1, thereby preventing the bearing seat 1 from being scratched by the liner locating pin 211, and preventing the liner locating pin 211 from being broken due to shear force, thereby further improving the service life of the bearing assembly.

[0053] In order to improve the service life of the liner 22, continue to refer to Figure 2 and Figure 4 The pin hole 221 includes a first hole segment and a second hole segment which are interconnected. In the radial direction of the bearing accommodating cavity, the first hole segment is located radially outside the second hole segment. The aperture D1 of the first hole segment is larger than the aperture D2 of the second hole segment. The gasket positioning pin 211 extends into the first hole segment.

[0054] During the sliding of the bearing shell 21 relative to the bearing seat 1, the liner locating pin 211 deflects relative to the bearing seat 1. At this time, the radial outer end of the liner locating pin 211 extends into the second hole segment. During the deflection of the bearing shell 21 relative to the bearing seat 1 with the liner locating pin 211 as a fulcrum, the radial outer end of the liner locating pin 211 is spaced apart from the liner 22 to avoid contact between the radial outer end of the liner locating pin 211 and the hole wall of the pin hole 221, thereby avoiding scratching of the liner 22 by the radial outer end of the liner locating pin 211 during the deflection, thereby improving the service life of the liner 22.

[0055] In order to increase the service life of the gasket 22 and prevent the radial outer end of the gasket locating pin 211 from scratching the gasket 22, the pin hole 221 in this embodiment is configured as a stepped hole, and the hole diameter at the position where the radial outer end of the gasket locating pin 211 is located is larger to prevent the radial outer end of the gasket locating pin 211 from contacting the gasket 22 and causing scratches on the gasket, thereby increasing the service life of the gasket 22.

[0056] In addition, optionally, in order to improve the reliability of the bearing assembly and prevent the radial outer end of the liner locating pin 211 from scratching the liner 22, the radial outer end of the liner locating pin 211 is provided with an arc-shaped end face (not shown), thereby increasing the service life of the liner 22.

[0057] In order to further improve the service life of the liner 22, a liner receiving groove 11 is formed on the inner side wall of the bearing receiving cavity. The liner 22 is arranged in the liner receiving groove 11, and the liner 22 is arranged to protrude toward the bearing shell 21 relative to the liner receiving groove 11, that is, the liner 22 protrudes inwardly along the radial direction of the bearing receiving cavity relative to the liner receiving groove 11 to fit with the bearing shell 21, so that the bearing shell 21 and the bearing seat 1 are arranged at intervals along the radial direction of the bearing receiving cavity. When the bearing shell 21 performs a pendulum motion relative to the bearing seat 1 with the liner positioning pin 211 as a fulcrum and the liner 22 is squeezed by the bearing shell 21 and deformed, the movement interference between the bearing shell 21 and the bearing seat 1 is avoided, thereby improving the reliability of the bearing assembly. Furthermore, by protruding toward the bearing shell 21 relative to the liner receiving groove 11, the contact and friction between the bearing shell 21 and the bearing seat 1 during the sliding process can also be avoided, thereby further improving the service life of the bearing assembly.

[0058] In order to further improve the service life of the liner locating pin 211, in the circumferential direction of the bearing accommodating cavity, the gap L1 between the bearing shell 21 and the circumferential limit portion 3 is smaller than the gap L2 between the liner 22 and the circumferential side wall of the liner accommodating groove 11. With such a configuration, when the bearing shell 21 slips relative to the bearing seat 1 along the circumference of the main shaft, the bearing shell 21 contacts the circumferential limit portion 3 and stops sliding, and at this time, the liner 22 does not contact the circumferential side wall of the liner accommodating groove 11, that is, when the bearing shell 21 slips along the circumference of the main shaft, the liner 22 moves synchronously with the bearing shell 21, and the gap between the liner 22 and the side wall of the liner accommodating groove 11 is still maintained, thereby avoiding the liner locating pin 211 from being subjected to shear force, and thus improving the service life of the liner locating pin 211.

[0059] Continue to refer to Figures 1 to 4 In order to further reduce the manufacturing cost of the bearing seat 1, the bearing seat 1 includes a bearing seat body 12 and a seat body protrusion 13, a bearing accommodating cavity is formed on the bearing seat body 12, the seat body protrusion 13 is arranged in the bearing accommodating cavity, and the seat body protrusion 13 is protruded relative to the bearing accommodating cavity toward the bearing shell 21, and a gasket accommodating groove 11 is formed on the seat body protrusion 13, for example but not limited to, the gasket accommodating groove 11 is formed on the side of the seat body protrusion 13 facing the main shaft, the gasket 22 is arranged in the gasket accommodating groove 11 and the gasket 22 is protruded relative to the gasket accommodating groove 11 toward the bearing shell 21.

[0060] This embodiment is explained by taking the gasket receiving groove 11 set on the seat body protrusion 13 as an example. Since the gasket receiving groove 11 is relatively small in size and is processed outside the bearing seat 1, the processing difficulty of the gasket receiving groove 11 is reduced, thereby reducing the manufacturing cost of the bearing seat 1.

[0061] In addition, the gasket receiving groove 11 can also be directly provided on the inner wall of the bearing seat body 12, such as Figure 6 As shown, it will be described below, but not limited to this.

[0062] This embodiment is described by taking the example that the seat protrusion 13 and the bearing seat body 12 are independently formed and the seat protrusion 13 is connected to the bearing seat body 12 to reduce the manufacturing difficulty of the bearing seat 1 and further reduce the manufacturing cost of the bearing seat 1, but is not limited to this.

[0063] Specifically, the inner wall of the bearing seat body 12 is provided with a seat body accommodating groove 14, which matches the seat body protrusion 13, so that the radial outer end of the seat body protrusion 13 along the radial direction of the bearing accommodating cavity is arranged in the seat body accommodating groove 14, thereby improving the connection reliability of the seat body protrusion 13 and preventing the seat body protrusion 13 from moving around at will.

[0064] In addition, the seat protrusion 13 can also be formed with the bearing seat body 12 by an integral molding process, but the present invention is not limited thereto.

[0065] Continue to refer to Figures 1 to 4 The circumferential limiting portion 3 is used to limit the bearing shell 21. For example, but not limited to, the circumferential limiting portion 3 limits the bearing shell 21 in the circumferential direction of the bearing accommodating cavity to prevent the bearing shell 21 from moving randomly in the circumferential direction of the bearing accommodating cavity relative to the bearing seat 1, thereby further improving the reliability of the bearing assembly.

[0066] In this embodiment, the circumferential limiting portion 3 is described as a limiting pin to reduce the manufacturing difficulty of the bearing seat 1, thereby reducing the manufacturing cost of the bearing assembly, but the present invention is not limited thereto.

[0067] Specifically, the limit pins are arranged in pairs, and a pair of limit pins are respectively arranged on both sides of the bearing shell 21 along the circumferential direction of the bearing accommodating cavity, and the side of the limit pin facing the bearing shell 21 has a pin limit surface 31 that can match the bearing shell 21. When the bearing shell 21 contacts the limit pin, the bearing shell 21 and the pin limit surface 31 of the limit pin are in surface contact, which increases the contact area, avoids damage to the limit pin due to local stress concentration, improves the shear resistance of the bearing assembly, and thus improves the reliability of the bearing assembly.

[0068] In order to reduce the manufacturing cost of the bearing assembly and the manufacturing difficulty of the bearing seat 1, the stop pin can be connected to the bearing seat 1 by fastener connection, welding and other processes, but the present invention is not limited thereto. In this embodiment, an example is given in which the end of the stop pin is provided with an external thread and the bearing seat 1 is provided with a threaded hole matching the stop pin, but the present invention is not limited thereto.

[0069] In this embodiment, the stop pin is cylindrical, and a pin stop surface 31 is formed by turning or milling on one side of the stop pin facing the bearing bush 21, but the invention is not limited thereto. In addition, the stop pin can also be formed as a prism, but the invention is not limited thereto.

[0070] Reference Figures 5 to 7 ,and Figure 1 What is different from the embodiment is that in this embodiment, the circumferential limiting portion 3 is a bearing limiting groove, which is recessed from the inner wall of the bearing accommodating cavity, and the axial limiting groove has a limiting surface on the side facing the bearing 21, and the limiting surface can match the bearing 21, so that the bearing 21 is in surface contact with the circumferential limiting portion 3, which increases the contact area, avoids damage to the bearing limiting groove due to local stress concentration, improves the shear resistance of the bearing assembly, and thus improves the reliability of the bearing assembly.

[0071] Reference Figure 6 and Figure 7 The bearing 21 also includes a bearing body 212 and a bearing boss 213. The bearing boss 213 protrudes from the radial outer surface of the bearing body 212. The bearing limiting groove includes a first limiting groove 32. The first limiting groove 32 is arranged on the inner wall of the bearing accommodating cavity. The bearing boss 213 is inserted into the first limiting groove 32. The first limiting groove 32 is provided with a first limiting surface on the side facing the bearing boss 213.

[0072] In this embodiment, the first limiting groove 32 is used as a bearing bush limiting groove to limit the bearing bush 21 along the circumferential direction of the bearing accommodating cavity. Specifically, the first limiting groove 32 cooperates with the bearing bush boss 213 to limit the bearing bush 21 along the circumferential direction of the bearing accommodating cavity.

[0073] The first limiting surface can match the bearing boss 213, so that the bearing 21 is in surface contact with the circumferential limiting portion 3, which increases the contact area, improves the shear resistance of the bearing assembly, and thus improves the reliability of the bearing assembly.

[0074] In order to maintain the tiltability of the bearing shell 21, a gap is provided between the radial outer surface of the bearing shell body 212 and the inner wall of the bearing accommodating cavity in this embodiment, but the present invention is not limited thereto.

[0075] Continue to refer to Figure 6 and Figure 7 In order to further improve the reliability of the bearing assembly, the bearing limiting groove also includes a second limiting groove 33. The gasket positioning pin 211 is arranged on the radial outer surface of the bearing boss 213. The second limiting groove 33 is arranged on both sides of the bearing body 212 along the circumferential direction of the bearing accommodating cavity. The bearing body 212 is inserted into the second limiting groove 33, and a second limiting surface is arranged on the side of the second limiting groove 33 facing the bearing body 212.

[0076] In this embodiment, the bearing bush limiting groove includes a first limiting groove 32 and a second limiting groove 33. The first limiting groove 32 cooperates with the bearing bush boss 213 and the second limiting groove 33 cooperates with the bearing bush body 212 to achieve limiting of different parts of the bearing bush 21, thereby improving the reliability of limiting the bearing bush 21. The second limiting surface can match the bearing bush body 212. When the bearing bush body 212 and the second limiting groove 33 are in contact, the two are in surface contact, which increases the contact area and avoids the wear of the second limiting groove 33 due to local stress concentration, thereby improving the reliability of the second limiting groove 33.

[0077] Furthermore, the first limiting groove 32 forms a gasket receiving groove 11 to reduce the number of grooves of the bearing seat 1, thereby reducing the processing cost of the bearing seat 1. Specifically, the gasket 22 is arranged in the first limiting groove 32, and the bearing boss 213 is inserted into the first limiting groove 32, the gasket 22 is located between the bearing boss 213 and the bottom wall of the gasket receiving groove 11, and there is a gap between the radial outer surface of the bearing body 212 and the bottom of the second limiting groove 33, so that the bearing 21 can deflect relative to the bearing seat 1 with the gasket positioning pin 211 as the fulcrum, so as to avoid the bearing body 212 from contacting and colliding with the bottom of the second limiting groove 33 and being damaged.

[0078] Reference Figures 8 to 10 ,and Figure 1 What is different from the embodiment is that the circumferential limiting portion 3 is a seat body protrusion 13, which protrudes from the inner wall of the bearing accommodating cavity, and the radial outer surface of the bearing shell 21 forms a limiting groove 214, and the seat body protrusion 13 is inserted into the limiting groove 214, and a limiting surface is set on one side of the seat body protrusion 13 facing the limiting groove 214.

[0079] Specifically, the bearing seat 1 includes a bearing seat body 12 and a seat body protrusion 13. A bearing accommodating cavity is formed on the bearing seat body 12. The seat body protrusion 13 is arranged in the bearing accommodating cavity, and the seat body protrusion 13 protrudes toward the bearing shell 21 relative to the bearing accommodating cavity. The seat body protrusion 13 is supported on the radial outer side of the bearing shell 21 along the radial direction of the main shaft. A limiting groove 214 is formed on the radial outer surface of the bearing shell 21. The seat body protrusion 13 is inserted into the limiting groove 214, so that the seat body protrusion 13 limits the bearing shell 21 along the circumferential direction of the bearing accommodating cavity.

[0080] In this embodiment, a limiting surface is set on the side of the seat body protrusion 13 facing the limiting groove 214, and the limiting surface can match the limiting groove 214. When the seat body protrusion 13 and the bearing shell 21 are in contact, there is surface contact between the limiting groove 214 and the seat body protrusion 13, which increases the contact area and improves the shear resistance of the bearing assembly, thereby improving the operating reliability of the bearing assembly.

[0081] Specifically, the gasket locating pin 211 is formed on the bottom surface of the limiting groove 214, the gasket accommodating groove 11 is formed on the radial inner surface of the seat body protrusion 13, and the gasket 22 protrudes a predetermined height relative to the limiting groove 214. When the bearing shell 21 swings relative to the bearing seat 1 with the gasket locating pin 211 as a fulcrum, the bearing shell 21 is prevented from being damaged by contact and collision with the bearing seat 1, thereby improving the service life of the bearing assembly.

[0082] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0083] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0084] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0085] The features, structures or characteristics described in the present disclosure may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A bearing assembly, characterized in that: The bearing assembly comprises: A bearing seat (1) having a bearing accommodating cavity; A plurality of bearing shells (21) are arranged in the bearing accommodating cavity at intervals along the circumferential direction of the bearing accommodating cavity; A plurality of liners (22), each of the liners (22) being correspondingly arranged between the radial outer surface of the bearing shell (21) and the inner side wall of the bearing accommodating cavity, the liners (22) being provided with a pin hole (221), the radial outer surface of the bearing shell (21) being provided with a liners positioning pin (211), and the liners positioning pin (211) being arranged in the pin hole (221); A circumferential limiting portion (3) is arranged on the inner side wall of the bearing accommodating cavity to limit the bearing bush (21).

2. The bearing assembly according to claim 1, characterized in that The liner positioning pin (211) has a predetermined gap with the inner side wall of the bearing accommodating cavity, the liner positioning pin (211) extends radially along the bearing accommodating cavity, and the radial outer end of the liner positioning pin (211) is provided with an arc-shaped end surface; and / or, The gasket positioning pin (211) has a predetermined gap with the inner wall of the bearing accommodating cavity, and the pin hole (221) includes a first hole segment and a second hole segment that are connected to each other. In the radial direction of the bearing accommodating cavity, the first hole segment is located radially outside the second hole segment, the hole diameter of the first hole segment is larger than the hole diameter of the second hole segment, and the gasket positioning pin (211) extends into the first hole segment.

3. The bearing assembly according to claim 2, characterized in that A gasket receiving groove (11) is formed on the inner side wall of the bearing receiving cavity, the gasket (22) is arranged in the gasket receiving groove (11), and the gasket (22) is protruded relative to the gasket receiving groove (11) toward the bearing shell (21).

4. The bearing assembly according to claim 3, characterized in that In the circumferential direction of the bearing accommodating cavity, a gap L1 between the bearing shell (21) and the circumferential limiting portion (3) is smaller than a gap L2 between the liner (22) and the circumferential side wall of the liner accommodating groove (11).

5. The bearing assembly according to claim 4, characterized in that The circumferential limiting portion (3) comprises limiting pins arranged on both circumferential sides of the bearing shell (21), and the side of the limiting pin facing the bearing shell (21) has a pin limiting surface (31).

6. The bearing assembly according to any one of claims 3 to 5, characterized in that: The bearing seat (1) comprises a bearing seat body (12) and a seat body protrusion (13); the bearing accommodating cavity is formed on the bearing seat body (12); the seat body protrusion (13) is arranged in the bearing accommodating cavity, and the seat body protrusion (13) is protruded relative to the bearing accommodating cavity toward the bearing shell (21); and the gasket accommodating groove (11) is formed on the seat body protrusion (13).

7. The bearing assembly according to claim 3, characterized in that The circumferential limiting portion (3) comprises a bearing bush limiting groove recessed from the inner side wall of the bearing accommodating cavity, and the bearing bush limiting groove has a limiting surface on a side facing the bearing bush (21).

8. The bearing assembly according to claim 7, wherein: The bearing (21) further comprises a bearing body (212) and a bearing boss (213), wherein the bearing boss (213) protrudes from the radial outer surface of the bearing body (212), and the bearing limiting groove comprises a first limiting groove (32), wherein the first limiting groove (32) is arranged on both sides of the bearing boss (213) along the circumferential direction of the bearing accommodating cavity, and the bearing boss (213) is inserted into the first limiting groove (32), and a first limiting surface is arranged on the side of the first limiting groove (32) facing the bearing boss (213), and a gap is provided between the radial outer surface of the bearing body (212) and the inner wall of the bearing accommodating cavity.

9. The bearing assembly according to claim 8, wherein: The bearing shell limiting groove also includes a second limiting groove (33), which is arranged on both sides of the bearing shell body (212) along the circumferential direction of the bearing accommodating cavity, the bearing shell body (212) is inserted into the second limiting groove (33), and a second limiting surface is arranged on the side of the second limiting groove (33) facing the bearing shell body (212).

10. The bearing assembly according to claim 9, wherein: The first limiting groove (32) forms the gasket receiving groove (11), the gasket locating pin (211) is arranged on the radial outer surface of the bearing boss (213), the gasket (22) is arranged in the first limiting groove (32), and the bearing boss (213) is inserted into the first limiting groove (32), the gasket (22) is located between the bearing boss (213) and the bottom wall of the gasket receiving groove (11), and there is a gap between the radial outer surface of the bearing body (212) and the bottom of the second limiting groove (33).

11. The bearing assembly according to claim 3, characterized in that The circumferential limiting portion (3) comprises a seat protrusion (13) protruding from the inner side wall of the bearing accommodating cavity, a limiting groove (214) is formed on the radial outer surface of the bearing shell (21), the seat protrusion (13) is inserted into the limiting groove (214), and a limiting surface is provided on one side of the seat protrusion (13) facing the limiting groove (214).

12. The bearing assembly according to claim 11, characterized in that The gasket positioning pin (211) is formed on the bottom surface of the limiting groove (214), the gasket receiving groove (11) is formed on the radial inner surface of the seat body protrusion (13), and the gasket (22) protrudes a predetermined height relative to the limiting groove (214).

13. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the bearing assembly according to any one of claims 1-12.

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