Thrust sliding bearing, shaft system and wind generating set

Abstract

The invention provides a thrust sliding bearing, a shaft system and a wind generating set. The thrust sliding bearing comprises a thrust disc, a thrust supporting disc and a first bearing bush. The thrust disc is arranged on the rotating shaft and protrudes outwards in the radial direction relative to the rotating shaft; the thrust supporting part is opposite to the thrust disc in the axial direction of the rotating shaft, and the bearing bush assembly is fixedly installed on the axial side surface of the thrust disc, makes sliding contact with the thrust supporting part and can rotate along with the thrust disc. According to the thrust sliding bearing provided by the embodiment of the invention, the bearing bush assembly is fixedly mounted on the thrust disc, when the bearing bush assembly needs to be maintained or replaced, the thrust disc can be driven to rotate through the rotation of the rotating shaft, and under the condition, the bearing bush assembly can rotate along with the thrust disc, so that the bearing bush assembly can rotate along with the thrust disc; when the bearing bush assembly needs to be replaced, the bearing bush assembly needing to be replaced can be rotated to the upper non-load point, so that the bearing bush assembly can be detached from the rotating shaft under the condition that the bearing bush assembly needing to be replaced does not bear load, and the operation and maintenance difficulty can be remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the field of wind power, and particularly to a thrust sliding bearing, a shafting and a wind turbine generator set. Background Art

[0002] A wind turbine generator set is a clean energy device that converts wind energy into electrical energy. The wind turbine generator set includes a main shafting. As a component for power transmission, the main shafting is specifically responsible for transmitting the rotational motion of the motor and bearing various torques, and it belongs to an important component of the wind turbine generator set.

[0003] The main shafting usually includes a rolling shafting and a sliding shafting. With the trend of the wind turbine generator set developing towards large megawatts, the bearing size of its transmission chain is also continuously increasing. The large-size bearings bring challenges to the processing, transportation, operation and maintenance, testing, etc. of conventional rolling bearings, resulting in the continuous increase in the cost of ultra-large-size rolling bearings. Under this background, more and more enterprises will choose to apply the sliding shafting.

[0004] In the environment of a wind turbine, the bending moment of the impeller changes with the change of wind force, which will affect the local load of the sliding shafting, resulting in the local bearing bush of the sliding shafting being prone to excessive wear and requiring regular maintenance to ensure the normal operation of the shafting. In the existing sliding shafting during the rotation of the rotating shaft, the bearing bush is fixed. When performing maintenance on the tower of the unit, due to the existence of the impeller bending moment, the local bearing bush may not be able to be withdrawn. For example, the lowering of the impeller will generate a load on the lower part of the sliding shafting, resulting in the bearing bush located at the lower part of the rotating shaft being difficult to withdraw, increasing the difficulty of operation and maintenance. Summary of the Invention

[0005] One of the main objects of the present invention is to provide a thrust sliding bearing, a shafting and a wind turbine generator set, and the bearing bush of the thrust sliding bearing can be easily withdrawn, thereby significantly reducing the difficulty of operation and maintenance.

[0006] For the above object, the present invention provides the following technical solutions:

[0007] According to one aspect of the present invention, there is provided a thrust sliding bearing, the thrust sliding bearing comprising: a thrust disc, a thrust support disc and a first bearing bush. The thrust disc is arranged on the rotating shaft and protrudes radially outward relative to the rotating shaft; the thrust support portion is opposite to the thrust disc in the axial direction of the rotating shaft, and the bearing bush assembly is fixedly installed on the axial side surface of the thrust disc, is in sliding contact with the thrust support portion, and can rotate with the thrust disc.

[0008] According to the thrust sliding bearing provided by the embodiments of the present application, the bearing bush assembly is fixedly installed on the thrust disc. When the bearing bush assembly needs to be repaired or replaced, the thrust disc can be driven to rotate by rotating the rotating shaft. In this case, the bearing bush assembly can rotate with the thrust disc. Thus, the bearing bush assembly to be replaced can be rotated to the non-load point above first, so that it can be disassembled from the rotating shaft when the bearing bush assembly to be replaced does not bear the load. For example, the bearing bush assembly is pulled out along the radial direction of the thrust disc, so that the maintenance operation of the bearing bush can be facilitated, and the operation and maintenance difficulty can be significantly reduced.

[0009] In some embodiments, an installation groove for the bearing bush assembly is provided on the axial side surface of the thrust disc, and the bearing bush assembly is installed in the installation groove for the bearing bush assembly.

[0010] In these embodiments, the bearing bush assembly is installed in the installation groove for the bearing bush assembly, which can limit and fix the bearing bush assembly to ensure the firmness of the fixed bearing bush assembly and prevent it from coming out when rotating with the thrust disc. In addition, it also needs to be able to be pulled out with a certain external force to ensure the feasibility of maintenance.

[0011] In some embodiments, the bearing bush assembly includes a bottom plate and a bearing bush. The bottom plate is embedded in the installation groove for the bearing bush assembly, and a bearing bush embedding groove is provided in the bottom plate; the bearing bush is embedded in the bearing bush embedding groove and includes a sliding contact portion protruding from the thickness direction of the bottom plate, and the sliding contact portion can slidably contact the thrust support portion.

[0012] In these embodiments, the bearing bush is accommodated in the bearing bush embedding groove of the bottom plate, which can ensure the connection stability of the bearing bush. During installation, the thrust support portion is installed on other components of the wind turbine generator, and the sliding contact portion can slidably contact the thrust support portion, so that the frictional sliding between the bearing bush assembly and the thrust support portion can be realized to limit the axial movement of the rotating shaft.

[0013] In some embodiments, the bottom plate includes a first clamping plate and a second clamping plate connected to each other in the thickness direction. The second clamping plate is located outside the first clamping plate, and a through hole is provided in the second clamping plate, and the sliding contact portion passes through the through hole and is exposed.

[0014] In these embodiments, the bottom plate includes a first clamping plate and a second clamping plate connected to each other in the thickness direction, that is, the bottom plate is formed by connecting two clamping plates to each other, so that it is convenient to install the bearing bush and can increase the connection strength and stability of the bearing bush assembly.

[0015] In some embodiments, the bearing shell assembly includes a first bearing shell assembly. The thrust support portion includes a thrust support disk which is located on the first axial side of the thrust disk. The bearing shell assembly includes a first bearing shell assembly which is fixedly installed on the side surface of the first axial side of the thrust disk and faces the thrust support disk.

[0016] In these embodiments, the thrust support disk can be used to be fixed to other components of the wind turbine generator set, so it can provide additional support force for the shafting. The thrust disk is arranged on the rotating shaft and protrudes radially outward relative to the rotating shaft. The first bearing shell assembly is between the thrust disk and the thrust support disk and is in frictional contact with the thrust support disk, and can bear the axial thrust on one side, so as to limit the axial movement of the rotating shaft to a certain extent and ensure the stability and reliability of the entire shafting.

[0017] In some embodiments, the bearing shell assembly further includes a second bearing shell assembly which is fixedly installed on the second axial side of the thrust disk and can rotate with the thrust disk. The thrust support portion further includes a thrust ring which is arranged on the second axial side of the thrust disk and is in sliding contact with the second bearing shell assembly.

[0018] In these embodiments, the thrust ring can be used to be fixed to other components of the wind turbine generator set, so it can provide additional support force for the shafting. The thrust disk is arranged on the rotating shaft and protrudes radially outward relative to the rotating shaft. The second bearing shell assembly is between the thrust disk and the thrust ring and is in frictional contact with the thrust ring, and can bear the axial thrust on the other side, so as to limit the axial movement of the rotating shaft to a certain extent and ensure the stability and reliability of the entire shafting.

[0019] In some embodiments, the thrust sliding bearing further includes a connecting ring which is located on the radial outside of the thrust disk, between the thrust support disk and the thrust ring, and connects the thrust support disk and the thrust ring to each other.

[0020] In these embodiments, setting the thrust support disk and the thrust ring as a split structure can facilitate the installation of the shafting. The thrust support disk and the thrust ring are connected to each other through the connecting ring. In this case, the thrust support disk and the thrust ring can be integrated together. Therefore, when fixing, one of the thrust support disk and the thrust ring can be fixed, reducing the setting of the support structure, so as to avoid the trouble of multiple fixings.

[0021] In some embodiments, the bearing shell assembly installation groove has an opening facing the axial direction and the radially outward direction of the thrust disk. The connecting ring is provided with a bearing shell maintenance hole, and the bearing shell assembly can be disassembled and installed through the bearing shell maintenance hole.

[0022] In these embodiments, the bearing shell assembly mounting groove has an opening facing the axial direction of the thrust disc and a radially outward direction. In this way, it is convenient to install the bearing shell assembly. By setting the bearing shell repair hole opposite to the radially outward opening, the bearing shell assembly can be inserted from the side and installed on the thrust disc, enabling quick disassembly and installation of the bearing shell assembly that needs to be maintained without disassembling other components, improving the efficiency and accuracy of maintenance. Through the axially outward opening, it is convenient to achieve the sliding contact between the bearing shell assembly and the thrust support portion.

[0023] In some embodiments, the connecting ring is located outside the first bearing shell assembly and the second bearing shell assembly, and both the first bearing shell assembly and the second bearing shell assembly can be disassembled and installed through the repair hole.

[0024] In these embodiments, both the first bearing shell assembly and the second bearing shell assembly can be disassembled and installed through the repair hole. In this way, the maintenance efficiency can be improved.

[0025] In some embodiments, the bearing shell assembly mounting groove includes a first bearing shell mounting groove provided on the first axial side of the thrust disc and a second bearing shell mounting groove provided on the second axial side of the thrust disc, and the first bearing shell assembly and the second bearing shell assembly are respectively fixedly embedded in the first bearing shell mounting groove and the second bearing shell mounting groove.

[0026] In these embodiments, fixedly embedding the first bearing shell assembly and the second bearing shell assembly into the corresponding mounting grooves can prevent the bearing shell assembly from shifting in the circumferential direction.

[0027] In some embodiments, the first bearing shell mounting groove and the second bearing shell mounting groove are evenly arranged in the circumferential direction of the thrust disc, and the first bearing shell mounting groove and the second bearing shell mounting groove are staggered from each other in the axial direction of the thrust disc.

[0028] In these embodiments, by making the first bearing shell mounting groove and the second bearing shell mounting groove evenly arranged in the circumferential direction of the thrust disc 21, on the one hand, the uniform circumferential arrangement helps to ensure that the thrust is more evenly distributed on the bearing, thereby reducing local overload and wear. On the other hand, by staggering the bearing shell mounting grooves on both sides of the thrust disc in the axial direction, in this way, it is convenient to maintain and replace each bearing shell. For example, if it is necessary to maintain or replace a bearing shell, the staggered setting can make each bearing shell easier to be pulled out. In addition, by staggering the bearing shell mounting grooves on both sides of the thrust disc in the axial direction, it helps to balance the thrust on both sides, increase the overall stability of the bearing, and avoid vibration or shaft offset caused by unbalanced axial force. Moreover, under high-speed rotation or high-load conditions, the bearing generates heat, and the axially staggered bearing shell mounting grooves help to disperse the influence caused by thermal expansion, ensuring that the bearing still maintains good working performance under thermal action.

[0029] In some embodiments, the bottom plate is trapezoidal or fan-shaped, and a hoisting hole is provided on the bottom plate. The hoisting hole is located radially outside the bearing shell and extends radially outward along the rotating shaft and has an opening facing radially outward. The hoisting hole is a threaded hole.

[0030] In these embodiments, during use, an additional bolt can be used to connect to the threaded hole. In this way, when a tensile force is applied to the bolt, the bearing shell assembly moves along with the bolt, so as to extract the bearing shell assembly.

[0031] In some embodiments, both the thrust support disc and the thrust ring are provided with an outer oil inlet ring oil inlet path and an inner oil inlet ring oil inlet path. The outer oil inlet ring oil inlet path is used to supply lubricating oil to the radially outer sides of the first bearing shell and the second bearing shell, and the inner oil inlet ring oil inlet path is used to supply lubricating oil to the radially inner sides of the first bearing shell and the second bearing shell.

[0032] In these embodiments, the outer oil inlet ring oil inlet path and the inner oil inlet ring oil inlet path can ensure that the contact surfaces are effectively lubricated, avoiding the influence of dry friction on the overall performance of the thrust sliding bearing.

[0033] In some embodiments, the rotating shaft is arranged in the horizontal direction. The outer oil inlet ring oil inlet path is arranged at the upper part of the thrust sliding bearing, and the inner oil inlet ring oil inlet path is arranged at the lower part of the thrust sliding bearing.

[0034] In these embodiments, by arranging oil inlet paths at both the upper and lower parts of the thrust sliding bearing, the supply of lubricating oil can be ensured to be more uniform, ensuring that each bearing shell is effectively lubricated and reducing the wear between the bearing shell and the contact surface.

[0035] In some embodiments, the outer oil inlet ring oil inlet path and the inner oil inlet ring oil inlet path respectively include a radial oil inlet hole and an axial oil inlet hole communicated with the radial oil inlet hole. The axial oil inlet hole extends towards the thrust disc along the axial direction.

[0036] In these embodiments, both the outer oil inlet ring oil inlet path and the inner oil inlet ring oil inlet path include a radial oil inlet hole and an axial oil inlet hole communicated with the radial oil inlet hole. Therefore, the oil inlet path has a turning point. When pumping lubricating oil into the oil inlet path through a pressure pump, the bent route can gradually reduce the pressure of the pumped lubricating oil, avoiding direct pressure impact on the thrust sliding bearing and causing damage to it.

[0037] In some embodiments, an outer oil inlet ring and an inner oil inlet ring are respectively arranged on the axial outer sides of the axial oil inlet holes of the outer oil inlet ring oil inlet path and the inner oil inlet ring oil inlet path. The thrust support disc and the thrust ring both include a first annular groove and a second annular groove facing the thrust disc to respectively accommodate the outer oil inlet ring and the inner oil inlet ring. Wherein, the radial widths of the first annular groove and the second annular groove are respectively greater than the radial widths of the outer oil inlet ring and the inner oil inlet ring, and the axial depths of the first annular groove and the second annular groove are respectively greater than the axial thicknesses of the outer oil inlet ring and the inner oil inlet ring.

[0038] In these embodiments, the outer oil inlet ring and the inner oil inlet ring are respectively accommodated in the first annular groove and the second annular groove facing the thrust disc. The radial widths of the first annular groove and the second annular groove are greater than the radial widths of the outer oil inlet ring and the inner oil inlet ring, and the axial depths of the first annular groove and the second annular groove are greater than the axial thicknesses of the outer oil inlet ring and the inner oil inlet ring, ensuring that the outer oil inlet ring and the inner oil inlet ring can be completely accommodated therein and an oil inlet for lubricating oil flowing into the contact surface can be formed. In this case, it can be ensured that the lubricating oil can be smoothly guided to the contact surface and further conveyed to the contact surface between the bearing bush and the thrust disc to form a lubricating film, reduce wear, and ensure stability and reliability. By arranging the outer oil inlet ring and the inner oil inlet ring, the supply of lubricating oil can be made more uniform, so that the thrust sliding bearing can be lubricated in all directions to ensure the normal operation of each bearing bush, reduce wear, and extend the service life of each component of the thrust sliding bearing. The outer oil inlet ring and the inner oil inlet ring are fixed in the first annular groove and the second annular groove, ensuring that they can be stably fixed in the thrust sliding bearing and will not fall off due to working vibration or load change.

[0039] In some embodiments, the outer oil inlet ring includes a first groove facing the opening of the axial oil inlet hole of the outer oil inlet ring oil inlet path. A plurality of first oil baffle plates are arranged at a predetermined interval in the upper part of the first groove, such that the oil inlet holes of the outer oil inlet ring oil inlet path are located between adjacent first oil baffle plates. The inner oil inlet ring includes a second groove facing the opening of the axial oil inlet hole of the inner oil inlet ring oil inlet path. A plurality of second oil baffle plates are arranged at a predetermined interval in the upper part of the second groove, such that the oil inlet holes of the inner oil inlet ring oil inlet path are located between adjacent second oil baffle plates.

[0040] In these embodiments, the arrangement of the first oil baffle plates and the second oil baffle plates can control the flow rate and pressure of the pumped lubricating oil to a certain extent, ensuring that the supply amount of the lubricating oil meets the lubrication requirements between the bearing bush and the corresponding friction surface.

[0041] According to a second aspect of the present application, a shafting is provided, wherein the shafting includes the thrust sliding bearing provided in each of the above embodiments.

[0042] According to the third aspect of the present application, a wind turbine generator is provided, wherein the wind turbine generator includes the shafting provided in each of the above-described embodiments, the rotating shaft is connected to the impeller of the wind turbine generator, and the thrust support portion is connected to the nacelle of the wind turbine generator. Description of the Drawings

[0043] Through the description of the embodiments in conjunction with the drawings below, the above and / or other objects and advantages of the present invention will become clearer, wherein:

[0044] Figure 1 A schematic structural diagram of the shafting provided according to an exemplary embodiment of the present application is shown;

[0045] Figure 2 is Figure 1 An enlarged structural diagram of part I therein;

[0046] Figure 3 is Figure 1 An enlarged structural diagram of part II therein;

[0047] Figure 4 A schematic structural diagram of the assembled thrust sliding bearing and the rotating shaft according to an exemplary embodiment of the present application is shown;

[0048] Figure 5 A schematic structural diagram of the rotating shaft and the thrust disk according to an exemplary embodiment of the present application is shown;

[0049] Figure 6 is Figure 1 A structural diagram taken along the line A-A in therein;

[0050] Figure 7 A schematic structural diagram of a kind of bearing bush assembly according to an exemplary embodiment of the present application is shown;

[0051] Figure 8 A schematic cross-sectional structural diagram of the bearing bush assembly according to an exemplary embodiment of the present application is shown;

[0052] Figure 9 A schematic structural diagram of a kind of outer oil inlet ring according to an exemplary embodiment of the present application is shown;

[0053] Figure 10 is Figure 9 An enlarged structural diagram of part III therein;

[0054] Figure 11 A schematic structural diagram of a kind of inner oil inlet ring according to an exemplary embodiment of the present application is shown.

[0055] Symbol Explanation:

[0056] 10. Thrust support disc; 11. Outer oil inlet ring oil inlet path; 12. Inner oil inlet ring oil inlet path; 13. Support seat; 14. Support disc;

[0057] 20. Rotating shaft; 21. Thrust disc; 221. First bearing housing mounting groove; 222. Second bearing housing mounting groove;

[0058] 30. Thrust ring; 31. Outer oil inlet ring oil inlet path; 32. Inner oil inlet ring oil inlet path;

[0059] 40. Bearing assembly; 401. First bearing assembly; 402. Second bearing assembly; 41. Base plate;

[0060] 411. First clamping plate; 412. Second clamping plate; 43. Bearing; 431. Limit convex column; 44. Sliding contact part; 45. Lifting hole;

[0061] 50. Connecting ring;

[0062] 61. Outer oil inlet ring; 62. Inner oil inlet ring; 65. First oil baffle. Detailed implementation manners

[0063] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the embodiments of the present invention should not be construed as being limited to the embodiments set forth herein. Identical reference numerals in the figures denote identical or similar structures, and thus their detailed descriptions will be omitted.

[0064] It should be noted that the definitions of the orientation terms such as "upper", "lower", "top" and "bottom" in this application are all based on the orientation when the product is placed horizontally in the normal use state as the reference direction. It should not be construed as a specific limitation on the embodiments of this application. In addition, in the context, it also needs to be explained that when it is mentioned that one element is connected to another element, it can be either directly connected or indirectly connected, unless it is clearly stated that one element is directly connected to another element.

[0065] For the convenience of description, the front, rear, upper, lower, inner, outer and other orientation terms are used to describe the structure and operation method of the device. The front and rear can respectively refer to the positive direction and the negative direction of the axial direction in the drawings, the upper and lower can respectively refer to the positive direction and the negative direction in the height direction or thickness direction in the drawings, and the outward and inward in the radial direction can respectively refer to the direction away from the central axis and the direction towards the central axis in the radial direction.

[0066] In the environment of a wind turbine, the bending moment of the impeller changes with the wind force, which will affect the local load of the sliding shaft system, resulting in the local bearing bushes of the sliding shaft system being prone to excessive wear and requiring regular maintenance to ensure the normal operation of the shaft system. The sliding shaft systems in the prior art generally include a bearing housing, a rotating shaft located in the bearing housing, and a plurality of bearing bushes located between the rotating shaft and the bearing housing. The plurality of bearing bushes are arranged at intervals in the circumferential direction of the bearing housing and are fixedly connected to the bearing housing respectively, and the rotating shaft can rotate relative to the bearing bushes. Therefore, the existing bearing bushes are usually fixed on the bearing housing and fixed to the relevant components of the wind turbine together with the bearing housing. Therefore, during the rotation of the rotating shaft, the bearing bushes are stationary. When performing maintenance on the tower of the unit, due to the existence of the impeller bending moment, the local bearing bushes may not be able to be withdrawn. For example, the lowering of the impeller will generate a load on the lower part of the sliding shaft system, resulting in the bearing bushes located at the lower part of the rotating shaft being difficult to withdraw, increasing the maintenance difficulty.

[0067] To solve at least one technical problem in the prior art, according to the present application, a thrust sliding bearing is provided for installation on the rotating shaft 20 of a shaft system. Among them, as Figures 1 to 5 shown, the thrust sliding bearing includes a thrust disk 21, a thrust support portion, and a bearing bush assembly. The thrust disk 21 is arranged on the rotating shaft 20 and protrudes radially outward relative to the rotating shaft 20. The thrust support portion is opposite to the thrust disk 21 on the axial side portion of the thrust disk 21. The bearing bush assembly 40 is fixedly installed on the axial side surface of the thrust disk 21, is in sliding contact with the thrust support portion, and can rotate with the thrust disk 21.

[0068] In the embodiment of the present application, the bearing bush assemblies are multiple and are arranged at intervals along the circumferential direction of the thrust disk 21.

[0069] According to the thrust sliding bearing provided by the embodiment of the present application, the bearing bush assembly 40 is fixedly installed on the thrust disk 21. When the bearing bush assembly 40 needs to be repaired or replaced, the rotation of the rotating shaft 20 can drive the rotation of the thrust disk 21. In this case, the bearing bush assembly 40 can rotate with the thrust disk 21. Thus, the bearing bush assembly 40 to be replaced can be rotated to a non-load point above (for example, directly above), so that it can be disassembled from the rotating shaft when the bearing bush assembly to be replaced does not bear a load. For example, the bearing bush assembly 40 is withdrawn along the radial direction of the thrust disk 21. In this way, the maintenance operation of the bearing bush can be facilitated, and the maintenance difficulty can be significantly reduced.

[0070] In some embodiments, an installation groove for the bearing bush assembly is provided on the axial side surface of the thrust disk 21, and the bearing bush assembly 40 is installed in the installation groove for the bearing bush assembly.

[0071] In these embodiments, the bearing shell assembly 40 is installed in the bearing shell assembly installation groove, which can limit and fix the bearing shell assembly 40 to ensure the firmness of the fixation of the bearing shell assembly 40 and prevent it from coming out when rotating with the thrust disc. In addition, it is also necessary to enable it to be pulled out with a certain external force to ensure the feasibility of maintenance.

[0072] As an example, the size of the bearing shell assembly installation groove can be set to ensure that a predetermined extrusion force can be applied to the bearing shell assembly 40 arranged therein.

[0073] In some embodiments, the bearing shell assembly 40 includes: a bottom plate 41 and a bearing shell 43. The bottom plate 41 is embedded in the bearing shell assembly installation groove, and a bearing shell embedding groove is provided in the bottom plate 41; the bearing shell 43 is embedded in the bearing shell embedding groove and includes a sliding contact portion 44 protruding from the thickness direction of the bottom plate 41. The sliding contact portion 44 can be in sliding contact with the thrust support portion, so that frictional sliding between the bearing shell assembly and the thrust support portion can be realized.

[0074] In these embodiments, the bearing shell 43 is accommodated in the bearing shell embedding groove of the bottom plate 41, which can ensure the connection stability of the bearing shell 43. During installation, the thrust support portion is installed on other components of the wind turbine generator. Through the sliding contact portion 44, it can be in sliding contact with the thrust support portion, so that frictional sliding between the bearing shell assembly and the thrust support portion can be realized to limit the axial movement of the rotating shaft 20.

[0075] In some embodiments, the bottom plate 41 includes a first clamping plate 411 and a second clamping plate 412 connected to each other in the thickness direction. The second clamping plate 412 is located outside the first clamping plate 411, and a through hole is provided in the second clamping plate 412, and the sliding contact portion 44 passes through the through hole and is exposed.

[0076] In these embodiments, the bottom plate 41 includes a first clamping plate 411 and a second clamping plate 412 connected to each other in the thickness direction, that is, the bottom plate 41 is formed by connecting two clamping plates to each other. In this way, it is convenient to install the bearing shell 43 and can increase the connection strength and stability of the bearing shell assembly 40.

[0077] As an example, a limiting convex column 431 is provided on the bearing shell 43, and a limiting groove is provided on the second clamping plate 412. When installing the bearing shell assembly 40, the bearing shell 43 can be first arranged between the first clamping plate 411 and the second clamping plate 412, so that the bearing shell 43 is fixedly embedded in the bearing shell embedding groove, and the sliding contact portion 44 passes through the through hole on the second clamping plate 412 and is exposed, and the limiting convex column 431 and the limiting groove are matched. Then, the first clamping plate 411 and the second clamping plate 412 are fixed by bolts at a position avoiding the bearing shell, so that the connection strength and stability of the bearing shell assembly 40 can be increased.

[0078] In some embodiments, the bearing shell assembly includes a first bearing shell assembly 401. The thrust support portion includes a thrust support disk 10 which is configured to be fixed to other components of the wind turbine generator set. The thrust support disk 10 is located on the first axial side of the thrust disk 21 and is opposite to the thrust disk 21. The first bearing shell assembly 401 is fixedly installed on the side surface of the first axial side of the thrust disk 21 such that the first bearing shell assembly 401 is located between the thrust disk 21 and the thrust support disk 10 and is in sliding contact with the thrust support disk 10.

[0079] In these embodiments, the thrust support disk 10 can be used to be fixed to other components of the wind turbine generator set, so it can provide an additional supporting force for the shafting. The thrust disk 21 is arranged on the rotating shaft 20 and protrudes radially outward relative to the rotating shaft 20. The first bearing shell assembly 401 is between the thrust disk and the thrust support disk 10 and is in frictional contact with the thrust support disk 10, and can bear the axial thrust on one side, thereby being able to limit the axial movement of the rotating shaft 20 to a certain extent and ensuring the stability and reliability of the entire shafting.

[0080] In some embodiments, the bearing shell assembly 40 further includes a second bearing shell assembly 402. The second bearing shell assembly 402 is fixedly installed on the surface of the second axial side of the thrust disk 21 and can rotate with the thrust disk 21. The thrust support portion further includes a thrust ring 30 which is arranged on the second axial side of the thrust disk 21 and is in sliding contact with the second bearing shell assembly 402.

[0081] In these embodiments, the thrust ring 30 can be used to be fixed to other components of the wind turbine generator set, so it can provide an additional supporting force for the shafting. The thrust disk 21 is arranged on the rotating shaft 20 and protrudes radially outward relative to the rotating shaft 20. The second bearing shell assembly 402 is between the thrust disk and the thrust ring 30 and is in frictional contact with the thrust ring 30, and can bear the axial thrust on the other side, thereby being able to limit the axial movement of the rotating shaft 20 to a certain extent and ensuring the stability and reliability of the entire shafting.

[0082] According to the present application, the thrust support disk 10 and the thrust ring 30 are respectively located on the two axial sides of the thrust disk 21, and a first bearing shell assembly 401 is arranged between the thrust support disk 10 and the thrust disk 21, and a second bearing shell assembly 402 is arranged between the thrust ring 30 and the thrust disk 21. In this way, axial loads can be borne and dispersed in two directions, which helps to balance the asymmetric loads caused by rotation or external factors (such as the influence of wind direction change on the wind turbine), reduces the offset and vibration of the thrust sliding bearing. Specifically, it limits the axial movement of the rotating shaft 20, extends the service life of the thrust sliding bearing, and ensures the stability and reliability of the shafting operation.

[0083] According to the present application, bearing bushes assemblies 40 are respectively arranged on both axial sides of the thrust disc 21, which can avoid damaging the thrust disc 21 due to axial loads. During actual operation, the load-bearing capacity of the entire shafting can be improved, enabling it to withstand greater axial forces. Additionally, the wear of a single bearing bush can be reduced, and the service life of the entire shafting can be extended. Even under extreme working conditions, if a bearing bush on one side fails, the bearing bush on the other side can still temporarily bear the load as a temporary response mechanism until maintenance. In this way, the reliability and stability of the shafting of the wind turbine generator can be ensured.

[0084] In some embodiments, the thrust sliding bearing further includes a connecting ring 50. The connecting ring is located radially outside the thrust disc 21, between the thrust support disc 10 and the thrust ring 30, and connects the thrust support disc 10 and the thrust ring 30 to each other.

[0085] In these embodiments, the thrust support disc 10 and the thrust ring 30 are set as a split structure, which can facilitate the installation of the shafting. The thrust support disc 10 and the thrust ring 30 are connected to each other through the connecting ring 50. In this case, the thrust support disc 10 and the thrust ring 30 can be integrated together. Therefore, when fixing, one of the thrust support disc 10 and the thrust ring 30 can be fixed, reducing the setting of the support structure, thereby avoiding the trouble of multiple fixings.

[0086] As an example, a support structure can be arranged on the thrust support disc 10 and connected to other components of the wind turbine generator, without the need to provide an additional support structure for the thrust ring 30. Thus, only through the thrust support disc 10, support can be provided for both the first bearing bush assembly 401 and the second bearing bush assembly 402 simultaneously.

[0087] In some embodiments, the bearing bush assembly installation groove has an opening facing the axial direction of the thrust disc and a radially outward direction. The connecting ring 50 is provided with a bearing bush maintenance hole, and the bearing bush assembly 40 can be disassembled and installed through the bearing bush maintenance hole.

[0088] In these embodiments, the bearing bush assembly installation groove has an opening facing the axial direction of the thrust disc and a radially outward direction. In this way, it is convenient to install the bearing bush assembly 40. By setting the bearing bush maintenance hole opposite to the radially outward direction opening, the bearing bush assembly can be inserted from the side and installed on the thrust disc. The quick disassembly and installation of the bearing bush assembly 40 that needs to be maintained can be achieved without disassembling other components, improving the efficiency and accuracy of maintenance. Through the axially outward opening, it is convenient to achieve the sliding contact between the bearing bush assembly and the thrust support part.

[0089] In some embodiments, the connecting ring 50 is located outside the first bearing bush assembly 401 and the second bearing bush assembly 402, and both the first bearing bush assembly 401 and the second bearing bush assembly 402 can be disassembled and installed through the maintenance hole.

[0090] In these embodiments, both the first bearing shell assembly 401 and the second bearing shell assembly 402 can be disassembled and installed through the maintenance hole. Thus, the maintenance efficiency can be improved.

[0091] In some embodiments, a cover plate is provided on the bearing shell maintenance hole, which can seal the bearing shell maintenance hole when the bearing shell assembly does not need to be maintained and can be removed from the bearing shell maintenance hole when the bearing shell assembly needs to be maintained. Thus, while facilitating the maintenance of the bearing shell assembly, foreign objects can be prevented from entering the bearing shell assembly 40, which may affect the overall performance of the thrust sliding bearing.

[0092] According to an embodiment of the present application, as Figure 4 shown, the thrust support disk 10 includes a support base 13 and a support disk 14 provided on the support base 13. The support base 13 is used to be fixed on other components of the wind turbine generator or on a support platform. The support disk 14 is disposed on the first axial side of the thrust disk 21 and is opposite to the thrust disk 21. The rotating shaft 20 passes through the inside of the thrust support disk 10 and extends outwards to be connected to other components in the transmission chain.

[0093] According to the present application, the thrust disk 21 is disposed on the rotating shaft 20 and protrudes radially outwards relative to the rotating shaft 20. A bearing shell assembly installation groove for installing the bearing shell assembly can be provided on the thrust disk 21, and the bearing shell assembly 40 can be embedded in the installation groove to prevent the bearing shell assembly from shifting circumferentially. In addition, the installation groove is provided with an opening in the radially outward direction of the thrust disk 21, which can fix the bearing shell assembly on the thrust disk 21 in the radial direction of the thrust disk 21 and can ensure that it can be pulled outwards during the later operation and maintenance process. In Figure 2 it, the arrow S2 generally indicates the extraction direction of the bearing shell.

[0094] In some embodiments, the bearing shell assembly installation groove includes a first bearing shell installation groove 221 provided on the first axial side of the thrust disk 21 and a second bearing shell installation groove 222 provided on the second axial side of the thrust disk 21. The first bearing shell assembly 401 and the second bearing shell assembly 402 are respectively fixedly embedded in the first bearing shell installation groove 221 and the second bearing shell installation groove 222.

[0095] In these embodiments, the first bearing shell installation groove 221 and the second bearing shell installation groove 222 are respectively provided on both axial sides of the thrust disk 21. The first bearing shell assembly 401 and the second bearing shell assembly 402 have shapes and sizes matching the corresponding first bearing shell installation groove 221 and second bearing shell installation groove 222, so that the corresponding bearing shell can be firmly embedded in the corresponding installation groove for fixation. In this case, the bearing shell can be fixed on the thrust disk 21 by means of the limiting function of the installation groove to ensure that each bearing shell can cooperate with the thrust disk 21 and will not come off during the movement process.

[0096] In some embodiments, the first bearing shell mounting grooves 221 and the second bearing shell mounting grooves 222 are uniformly arranged in the circumferential direction of the thrust disk 21, and the first bearing shell mounting grooves 221 and the second bearing shell mounting grooves 222 are staggered from each other in the axial direction of the thrust disk 21.

[0097] In these embodiments, by arranging the first bearing shell mounting grooves and the second bearing shell mounting grooves uniformly in the circumferential direction of the thrust disk 21, on the one hand, the uniform circumferential arrangement helps to ensure a more uniform distribution of the thrust on the bearing, thereby reducing local overload and wear. On the other hand, by staggering the bearing shell mounting grooves on both sides of the thrust disk in the axial direction, the overall strength of the thrust disk can be ensured, and the situation of simultaneously opening bearing shell mounting grooves on both sides, resulting in too small local thickness of the thrust disk and reduced strength, can be avoided. In addition, by staggering the bearing shell mounting grooves on both sides of the thrust disk in the axial direction, it helps to balance the thrust on both sides, increase the overall stability of the bearing, and avoid vibration or shaft offset caused by unbalanced axial force. Furthermore, under high-speed rotation or high-load conditions, the bearing generates heat, and the axially staggered bearing shell mounting grooves help to disperse the influence caused by thermal expansion, ensuring that the bearing still maintains good working performance under thermal action.

[0098] In some embodiments according to the present application, the thrust disk 21 is arranged on the outer surface of the rotating shaft 20 and protrudes radially outward relative to the outer surface of the rotating shaft 20. In some embodiments, the thrust disk 21 can be integrally formed with the rotating shaft 20. Specifically, it can be a convex ring formed on the outer surface of the rotating shaft 20. In this way, the structural strength can be guaranteed, the alignment accuracy can be improved, and thus the vibration and wear caused by imbalance can be reduced. It should be noted that the present application does not limit that the thrust disk 21 and the rotating shaft 20 must be of an integrally formed structural form. For example, in some other embodiments, the thrust disk 21 and the rotating shaft 20 can be separate components and fixed together after manufacturing. Specifically, the thrust disk 21 is formed as a ring, sleeved on the outside of the rotating shaft 20 and fixed by welding. The axial side surface of the thrust disk 21 is provided with a bearing shell assembly mounting groove, and the bearing shell assembly 40 is mounted in the bearing shell mounting groove.

[0099] In the embodiments of the present application, the first axial side and the second axial side of the thrust disk 21 are the two opposite sides of the thrust disk 21. Refer to Figure 1 , the thrust disk 21 is formed as an annular body. The thrust disk 21 includes a radially inner side, a radially outer side, a first axial side, and a second axial side. The radially inner side of the thrust disk 21 is connected to the rotating shaft 20, and the first axial side and the second axial side are the two opposite sides in the axial direction of the rotating shaft 20.

[0100] According to the present application, the first bearing shell assembly 401 is fixedly installed on the first axial side of the thrust disk 21 and can rotate with the thrust disk 21. The thrust support disk 10 is arranged outside the first bearing shell assembly 401, such that the first bearing shell assembly 401 is arranged between the thrust disk 21 and the thrust support disk 10 and contacts one surface in the axial direction of the first bearing shell. The thrust support disk 10 is connected to other components of the wind turbine generator or the support platform to provide support for the thrust sliding bearing and bear the load of the rotating shaft 20 in the axial one-side direction.

[0101] According to the present application, the gap between the first bearing shell assembly 401 and the thrust support disk 10 can be adjusted according to the actual situation to adapt to the load and speed changes under different working conditions, improving the adaptability and reliability of the thrust sliding bearing. In some exemplary embodiments, the distance between the thrust support disk 10 and the first bearing shell mounting groove 221 is greater than the axial thickness of the first bearing shell assembly 401. Therefore, when the first bearing shell assembly 401 needs to be maintained, the first bearing shell assembly 401 can be withdrawn from between the thrust support disk 10 and the first axial side of the thrust disk 21 with the help of an external force without the first bearing shell assembly 401 being axially extruded.

[0102] According to the present application, in the thrust sliding bearing, the bearing shell is used to bear and transmit the axial thrust, that is, the force along the axis direction. Hereinafter, the specific structures of the first bearing shell assembly 401 and the second bearing shell assembly 402 will be mainly introduced.

[0103] In some embodiments, the bearing shell assembly 40 includes a first bearing shell assembly 401 and a second bearing shell assembly 402. The structures of the first bearing shell assembly 401 and the second bearing shell assembly 402 are basically the same, including a bottom plate 41 and a bearing shell 43. The bottom plate 41 is trapezoidal or fan-shaped, is embedded in the bearing shell mounting groove, and includes an inner surface facing the rotating shaft 20 and an outer surface provided with a lifting hole 45. The bearing shell 43 is embedded in the bottom plate 41 and includes a sliding contact portion 44 protruding from the thickness direction of the bottom plate 41.

[0104] Figure 7 An exemplary structure of the bearing shell assembly 40 is shown. Referring to Figure 1 、 Figure 4 、 Figure 7 and Figure 8 , the bearing shell assembly 40 respectively includes a bottom plate 41 and a bearing shell 43. The bottom plate 41 is trapezoidal or fan-shaped, is embedded in the bearing shell mounting groove, and includes an inner surface facing the rotating shaft 20 and an outer surface facing the radial outside. The bearing shell 43 is embedded in the bottom plate 41 and includes a sliding contact portion 44 protruding from the thickness direction of the bottom plate 41 to slidably contact the thrust support disk 10 or the thrust ring 30. As an example, the sliding contact portion 44 is circular and has a smooth outer surface.

[0105] In these embodiments, the bottom plate 41 in a trapezoidal or sector shape matches the shape of the bearing bush mounting groove, such that the bottom plate 41 can be tightly embedded into respective bearing bush mounting grooves, ensuring the limiting effect on the bearing bush, increasing the stability of the bearing bush fixation, and ensuring the load-bearing capacity. The sliding contact portion forms a smooth surface for contacting the thrust support disk 10 or the thrust ring 30, which can reduce wear and improve the movement efficiency and service life of the bearing bush. Additionally, a hoisting hole 45 is provided in the outer portion of the bottom plate 41. The hoisting hole 45 is located radially outside the bearing bush and is exposed in the bearing bush maintenance hole. Therefore, during maintenance, the bearing bush can be installed onto the thrust disk 21 or withdrawn from the thrust disk 21 by passing a hoisting device through the hoisting hole 45, facilitating the installation and maintenance of the bearing bush. Thus, the thrust sliding bearing according to the present application has a high load-bearing capacity and wear resistance, and can adapt to working conditions of high load and high-speed rotation.

[0106] In some embodiments, a hoisting hole 45 is provided on the bottom plate 41. The hoisting hole 45 is located radially outside the bearing bush 43, extends radially outward along the rotating shaft 20, and has an opening facing radially outside. The hoisting hole 45 is a threaded hole.

[0107] In these embodiments, during use, an additional bolt can be used to connect with the threaded hole. Thus, by applying a tensile force to the bolt, the bearing bush assembly 40 moves along with the bolt, thereby withdrawing the bearing bush assembly 40.

[0108] In some embodiments, an outer oil inlet ring oil inlet path 11 and an inner oil inlet ring oil inlet path 12 are provided on the thrust support disk 10. The outer oil inlet ring oil inlet path 11 and the inner oil inlet ring oil inlet path 12 are used to convey lubricating oil to the contact surface between the first bearing bush assembly 401 and the thrust support disk 10, thereby forming a lubricating film and reducing the wear between the first bearing bush assembly 401 and the thrust support disk 10. As Figures 1 to 3 、 Figure 6 shown, the outer oil inlet ring oil inlet path 11 is used to supply lubricating oil to the radially outer side of the first bearing bush assembly 401, and the inner oil inlet ring oil inlet path 12 is used to supply lubricating oil to the radially inner side of the first bearing bush assembly 401.

[0109] In some other embodiments, an outer oil inlet ring oil inlet path 31 and an inner oil inlet ring oil inlet path 32 are provided on the thrust ring 30. The outer oil inlet ring oil inlet path 31 and the inner oil inlet ring oil inlet path 32 are used to convey lubricating oil to the contact surface between the second bearing bush assembly 402 and the thrust ring 30, thereby forming a lubricating film and reducing the wear between the second bearing bush assembly 402 and the thrust ring 30. As an example, the outer oil inlet ring oil inlet path 31 is used to supply lubricating oil to the radially outer side of the second bearing bush assembly 402, and the inner oil inlet ring oil inlet path 32 is used to supply lubricating oil to the radially inner side of the second bearing bush assembly 402.

[0110] In some exemplary embodiments, the rotating shaft 20 is arranged in the horizontal direction, and the outer oil inlet ring oil inlet paths 11, 31 are arranged at the upper part of the thrust sliding bearing, and the inner oil inlet ring oil inlet paths 12, 32 are arranged at the lower part of the thrust sliding bearing.

[0111] In these embodiments, by arranging oil inlet paths both at the upper and lower parts of the thrust sliding bearing, it is possible to ensure a more uniform supply of lubricating oil, ensure effective lubrication of each bearing bush, and reduce wear between the bearing bush and the contact surface.

[0112] According to the present application, both the thrust support disk 10 and the thrust ring 30 are provided with outer oil inlet ring oil inlet paths 11, 31 and inner oil inlet ring oil inlet paths 12, 32. The outer oil inlet ring oil inlet paths 11, 31 and the inner oil inlet ring oil inlet paths 12, 32 of the thrust support disk 10 and the thrust ring 30 are substantially the same in structure. In some embodiments, the outer oil inlet ring oil inlet paths 11, 31 and the inner oil inlet ring oil inlet paths 12, 32 respectively include radial oil inlet holes and axial oil inlet holes communicating with the radial oil inlet holes, and the axial oil inlet holes extend in the axial direction towards the thrust disk 21.

[0113] As Figure 2 shown, the arrow S1 shows a schematic diagram of the flow direction of a kind of lubricating oil in the outer oil inlet ring oil inlet path 31. The oil inlet path according to the present application is described in combination with the outer oil inlet ring oil inlet path 31. As Figure 2 shown, in the schematic diagram of the lubricating oil flow direction S1, the vertical section represents the radial oil inlet hole, and the horizontal section represents the axial oil inlet hole.

[0114] In these embodiments, the radial oil inlet holes are used to introduce lubricating oil. For example, they are connected to an external lubrication system. The axial oil inlet holes communicate with the radial oil inlet holes and extend in the axial direction towards the thrust disk 21, and are used to convey the lubricating oil from the radial oil inlet holes to the contact surfaces (for example, the contact surface between the thrust support disk 10 and the first bearing bush assembly 401; the contact surface between the thrust ring 30 and the second bearing bush assembly 402). Both the outer oil inlet ring oil inlet path and the inner oil inlet ring oil inlet path include radial oil inlet holes and axial oil inlet holes communicating with the radial oil inlet holes. Therefore, the oil inlet path has a turning point. When pumping lubricating oil into the oil inlet path by a pressure pump, the bent route can gradually reduce the pressure of the pumped lubricating oil, avoiding direct pressure impact on the thrust sliding bearing and causing damage to it.

[0115] In some embodiments, an outer oil inlet ring oil inlet path 11, 31 and an inner oil inlet ring oil inlet path 12, 32 are respectively provided with an outer oil inlet ring 61 and an inner oil inlet ring 62 on the axial outer sides of the axial oil inlet holes. The thrust support disk 10 and the thrust ring 30 both include a first annular groove and a second annular groove facing the thrust disk 21 to respectively accommodate the outer oil inlet ring 61 and the inner oil inlet ring 62. Among them, the radial widths of the first annular groove and the second annular groove are respectively greater than the radial widths of the outer oil inlet ring 61 and the inner oil inlet ring 62, and the axial depths of the first annular groove and the second annular groove are respectively greater than the axial thicknesses of the outer oil inlet ring 61 and the inner oil inlet ring 62.

[0116] In these embodiments, the outer oil inlet ring 61 and the inner oil inlet ring 62 are respectively accommodated in the first annular groove and the second annular groove facing the thrust disk 21. The radial widths of the first annular groove and the second annular groove are greater than the radial widths of the outer oil inlet ring 61 and the inner oil inlet ring 62, and the axial depths of the first annular groove and the second annular groove are greater than the axial thicknesses of the outer oil inlet ring 61 and the inner oil inlet ring 62, ensuring that the outer oil inlet ring 61 and the inner oil inlet ring 62 can be completely accommodated therein and can form a lubricating oil inlet for flowing into the contact surface. In this case, it can ensure that the lubricating oil can be smoothly guided to the contact surface and further delivered to the contact surface between the bearing bush and the thrust disk to form a lubricating film, reduce wear, and ensure stability and reliability. By providing the outer oil inlet ring and the inner oil inlet ring, the supply of lubricating oil can be made more uniform, so that the thrust sliding bearing can be lubricated in all directions to ensure the normal operation of each bearing bush, reduce wear, and extend the service life of each component of the thrust sliding bearing. The outer oil inlet ring 61 and the inner oil inlet ring 62 are fixed in the first annular groove and the second annular groove to ensure that they can be stably fixed in the thrust sliding bearing and will not fall off due to working vibration or load change.

[0117] As Figures 1 to 3 、 Figures 9 to 11 shown, the outer oil inlet ring 61 includes a first groove facing the axial oil inlet hole openings of the outer oil inlet ring oil inlet paths 11, 31. A plurality of first oil baffle plates 65 are provided at a predetermined interval in the upper part of the first groove, such that the oil inlet holes of the outer oil inlet ring oil inlet paths 11, 31 are located between adjacent first oil baffle plates 65. The inner oil inlet ring 62 includes a second groove facing the axial oil inlet hole openings of the inner oil inlet ring oil inlet paths 12, 32. A plurality of second oil baffle plates are provided at a predetermined interval in the upper part of the second groove, such that the oil inlet holes of the inner oil inlet ring oil inlet paths 12, 32 are located between adjacent second oil baffle plates.

[0118] In the embodiment of the present application, the first groove of the outer oil inlet ring 61 opens towards the axial oil inlet holes of the outer oil inlet ring oil inlet paths 11, 31, and is used to guide lubricating oil into the corresponding oil inlet paths. A plurality of first oil baffle plates 65 are arranged at a predetermined interval in the upper part of the first groove, such that the oil inlet holes of the outer oil inlet ring oil inlet paths 11, 31 are located between adjacent first oil baffle plates. On the one hand, it can ensure that the lubricating oil can smoothly flow through the oil inlet holes and be guided to the contact surfaces of the thrust sliding bearing (for example, the contact surface between the thrust support disk 10 and the first bearing bush assembly 401; the contact surface between the thrust ring 30 and the second bearing bush assembly 402) to form a lubricating film and reduce wear. On the other hand, the arrangement of the first oil baffle plates and the second oil baffle plates can, to a certain extent, control the flow rate and pressure of the lubricating oil, ensuring that the supply amount of the lubricating oil meets the lubrication requirements between the bearing bush and the corresponding friction surface.

[0119] In the embodiment of the present application, the second groove of the inner oil inlet ring 62 opens towards the axial oil inlet holes of the inner oil inlet ring oil inlet paths 12, 32, and is used to guide lubricating oil into the corresponding oil inlet paths. A plurality of second oil baffle plates are arranged at a predetermined interval in the upper part of the second groove, such that the oil inlet holes of the inner oil inlet ring oil inlet paths 12, 32 are located between adjacent second oil baffle plates. On the one hand, it can ensure that the lubricating oil can smoothly flow through the oil inlet holes and be guided to the friction surfaces of the thrust sliding bearing (for example, the contact surface between the thrust support disk 10 and the first bearing bush assembly 401; the contact surface between the thrust ring 30 and the second bearing bush assembly 402) to form a lubricating film and reduce wear. On the other hand, the arrangement of the first oil baffle plates and the second oil baffle plates can, to a certain extent, control the flow rate and pressure of the lubricating oil, ensuring that the supply amount of the lubricating oil meets the lubrication requirements between the bearing bush and the corresponding friction surface.

[0120] According to a second aspect of the present application, a shafting is provided, wherein the shafting includes the thrust sliding bearing provided in each of the above embodiments.

[0121] According to a third aspect of the present application, a wind power generating set is provided, wherein the wind power generating set includes the shafting provided in each of the above embodiments. The rotating shaft 20 is connected to the impeller of the wind power generating set, and the thrust support part is connected to the nacelle of the wind power generating set. In some embodiments, the thrust support disk 10 can be connected to the nacelle of the wind power generating set.

[0122] In the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0123] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0124] The features, structures, or characteristics described in the present invention may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to give a thorough understanding of the embodiments of the present invention. However, those skilled in the art will realize that the technical solutions of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the present invention.

Claims

1. A thrust sliding bearing for mounting on a rotating shaft (20), characterized in that, The thrust sliding bearing includes: A thrust disk (21) which is arranged on the rotating shaft (20) and protrudes radially outward relative to the rotating shaft (20); A thrust support portion which is axially opposite to the thrust disk (21) along the rotating shaft (20); A bearing bush assembly (40) which is fixedly installed on the axial side surface of the thrust disk (21), is in sliding contact with the thrust support portion, and can rotate with the thrust disk (21).

2. The thrust sliding bearing according to claim 1, characterized in that, An axial side surface of the thrust disk (21) is provided with a bearing bush assembly installation groove, and the bearing bush assembly (40) is installed in the bearing bush assembly installation groove.

3. The thrust sliding bearing according to claim 2, characterized in that, The bearing bush assembly (40) includes: A bottom plate (41) which is embedded in the bearing bush assembly installation groove, and a bearing bush embedding groove is arranged in the bottom plate (41); A bearing bush (43) which is embedded in the bearing bush embedding groove and includes a sliding contact portion (44) protruding from the thickness direction of the bottom plate (41), and the sliding contact portion (44) can be in sliding contact with the thrust support portion.

4. The thrust sliding bearing according to claim 3, characterized in that, The bottom plate (41) includes a first clamping plate (411) and a second clamping plate (412) which are connected to each other in the thickness direction, the second clamping plate (412) is located outside the first clamping plate (411), and a through hole is formed in the second clamping plate (412), and the sliding contact portion (44) passes through the through hole and is exposed.

5. The thrust sliding bearing according to any one of claims 2-4, wherein the bearing bush assembly includes a first bearing bush assembly (401), the thrust support portion includes a thrust support disk (10), the thrust support disk (10) is located on the first axial side of the thrust disk (21), the bearing bush assembly (40) includes a first bearing bush assembly (401), and the first bearing bush assembly (401) is fixedly installed on the side surface of the first axial side of the thrust disk (21) and faces the thrust support disk (10).

6. The thrust sliding bearing according to claim 5, characterized in that, The bearing bush assembly (40) further includes: A second bearing bush assembly (402) which is fixedly installed on the second axial side of the thrust disk (21) and can rotate with the thrust disk (21), the thrust support portion further includes a thrust ring (30), the thrust ring (30) is arranged on the second axial side of the thrust disk (21) and is in sliding contact with the second bearing bush assembly (402).

7. The thrust sliding bearing according to claim 6, characterized in that, The thrust sliding bearing further includes a connecting ring (50) which is located radially outside the thrust disk (21), is between the thrust support disk (10) and the thrust ring (30), and connects the thrust support disk (10) and the thrust ring (30) to each other.

8. The thrust sliding bearing according to claim 7, characterized in that, The bearing bush assembly installation groove has an opening facing the axial direction of the thrust disk and the radially outward direction, the connecting ring (50) is provided with a bearing bush maintenance hole, and the bearing bush assembly (40) can be disassembled and installed through the bearing bush maintenance hole.

9. The thrust sliding bearing according to claim 8, characterized in that, The connecting ring (50) is located outside the first bearing shell assembly (401) and the second bearing shell assembly (402), and both the first bearing shell assembly (401) and the second bearing shell assembly (402) can be disassembled and installed through the bearing shell repair holes.

10. The thrust sliding bearing according to claim 6, characterized in that, The bearing shell assembly installation grooves include a first bearing shell installation groove (221) provided on the first axial side of the thrust disk (21) and a second bearing shell installation groove (222) provided on the second axial side of the thrust disk (21). The first bearing shell assembly (401) and the second bearing shell assembly (402) are respectively fixedly embedded in the first bearing shell installation groove (221) and the second bearing shell installation groove (222).

11. The thrust sliding bearing according to claim 10, wherein The first bearing shell installation groove (221) and the second bearing shell installation groove (222) are respectively arranged uniformly in the circumferential direction of the thrust disk (21), and the first bearing shell installation groove (221) and the second bearing shell installation groove (222) are offset from each other in the axial direction of the thrust disk (21).

12. The thrust sliding bearing according to claim 3, wherein The bottom plate (41) is trapezoidal or fan-shaped. A lifting hole (45) is provided on the bottom plate (41). The lifting hole (45) is located radially outside the bearing shell (43), extends radially outward along the rotating shaft (20), and has an opening facing radially outward. The lifting hole (45) is a threaded hole.

13. The thrust sliding bearing according to claim 6, wherein, Both the thrust support disk (10) and the thrust ring (30) are provided with an outer oil inlet ring oil inlet path (11, 31) and an inner oil inlet ring oil inlet path (12, 32). The outer oil inlet ring oil inlet path (11, 31) is used to supply lubricating oil to the radial outside of the first bearing shell assembly (401) and the second bearing shell assembly (402), and the inner oil inlet ring oil inlet path (12, 32) is used to supply lubricating oil to the radial inside of the first bearing shell assembly (401) and the second bearing shell assembly (402).

14. The thrust sliding bearing according to claim 13, characterized in that, The rotating shaft (20) is arranged in the horizontal direction. The outer oil inlet ring oil inlet path (11, 31) is provided at the upper part of the thrust sliding bearing, and the inner oil inlet ring oil inlet path (12, 32) is provided at the lower part of the thrust sliding bearing.

15. The thrust sliding bearing according to claim 13, wherein The outer oil inlet ring oil inlet path (11, 31) and the inner oil inlet ring oil inlet path (12, 32) respectively include a radial oil inlet hole and an axial oil inlet hole communicated with the radial oil inlet hole. The axial oil inlet hole extends along the axial direction towards the thrust disk (21).

16. The thrust sliding bearing according to claim 15, wherein Outer oil inlet rings (61) and inner oil inlet rings (62) are respectively arranged on the axial outer sides of the axial oil inlet holes of the outer oil inlet ring oil inlet path (11, 31) and the inner oil inlet ring oil inlet path (12, 32). The thrust support disk (10) and the thrust ring (30) both include a first annular groove and a second annular groove facing the thrust disk (21) to respectively accommodate the outer oil inlet ring (61) and the inner oil inlet ring (62). Wherein, the radial widths of the first annular groove and the second annular groove are respectively greater than the radial widths of the outer oil inlet ring (61) and the inner oil inlet ring (62), and the axial depths of the first annular groove and the second annular groove are respectively greater than the axial thicknesses of the outer oil inlet ring (61) and the inner oil inlet ring (62).

17. The thrust sliding bearing according to claim 16, wherein the outer oil inlet ring (61) includes a first groove facing the axial oil inlet hole opening of the outer oil inlet ring oil inlet path (11, 31), and a plurality of first oil baffle plates (65) are arranged at a predetermined interval in the upper part of the first groove, so that the oil inlet holes of the outer oil inlet ring oil inlet path (11, 31) are located between adjacent first oil baffle plates (65). the inner oil inlet ring (62) includes a second groove facing the axial oil inlet hole opening of the inner oil inlet ring oil inlet path (12, 32), and a plurality of second oil baffle plates are arranged at a predetermined interval in the upper part of the second groove, so that the oil inlet holes of the inner oil inlet ring oil inlet path (12, 32) are located between adjacent second oil baffle plates.

18. A shafting system, characterized in that, The shafting includes the thrust sliding bearing according to any one of claims 1 to 17.

19. A wind turbine generator, characterized in that, The wind turbine generator set includes the shafting according to claim 18, the rotating shaft (20) is connected to the impeller of the wind turbine generator set, and the thrust support portion is connected to the nacelle of the wind turbine generator set.

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