Bearing assembly structure and wind power gearbox
By using limiting shoulders in the bearing assembly structure to define the first thrust bearing axially within the limit space, the problem of loosening and failure of screws after thrust bearing assembly in the prior art is solved, and more efficient assembly and longer service life are achieved.
Patent Information
- Application Number
- CN202421676131.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the prior art, there is a risk of screw loose or failure after thrust bearings are assembled, resulting in damage to the thrust bearing and failure of the planet carrier thread hole, and the strength and service life of the planet carrier structure are reduced.
A bearing assembly structure is adopted, in which the second shaft section of the connecting shaft is recessed near one end of the first shaft section to form a limit shaft shoulder, and the first thrust bearing is sleeved within the limit shaft shoulder, which limit shaft shoulder defines the first thrust bearing in the limit space in the axial direction, avoiding the use of screws.
The first thrust bearing is quickly, efficiently and conveniently assembled on the limit shaft shoulder without screw connections and threaded holes, which improves the service life of the connecting frame and the first thrust bearing, reduces production costs, and avoids the risk of screw looseness.
Smart Images
Figure CN222702396U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing assembly, in particular to a bearing assembly structure and a wind power gear box. Background Art
[0002] In wind turbine gearboxes, thrust bearings are mostly used for gear installation. Taking planetary gears as an example, thrust bearings are used to bear the axial load of the planetary gears. In the current prior art, multiple screws are usually used to fix the thrust bearing to the planetary carrier, and the multiple screws are distributed at intervals along the circumference of the thrust bearing. However, since the thrust bearing has a low hardness and is greatly affected by the ambient temperature, there is a risk of the screws loosening or even failing after working for a long time. There is also a risk of damage to the thrust bearing due to the failure of the screws, and there is also a risk of failure of the threaded holes of the planetary carrier due to the failure of the screws; secondly, processing threaded holes on the planetary carrier will also reduce the structural strength and service life of the planetary carrier. Utility Model Content
[0003] The utility model aims to provide a bearing assembly structure and a wind power gearbox to solve the above problems existing after the thrust bearing is assembled in the prior art.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] The bearing assembly structure comprises:
[0006] A connecting frame and a connecting shaft, wherein the connecting shaft comprises a first shaft section and a second shaft section connected to each other, the first shaft section is plugged into the connecting frame, an outer peripheral wall of the second shaft section close to one end of the first shaft section is recessed to form a limiting shaft shoulder, and a limiting space is formed between the limiting shaft shoulder and the limiting end surface of the connecting frame;
[0007] The first thrust bearing is sleeved on the limiting shoulder and is located in the limiting space; the limiting shoulder axially limits the first thrust bearing in the limiting space.
[0008] As a preferred solution of the above-mentioned bearing assembly structure, the outer peripheral wall of the limiting shoulder is in a frustoconical shape, and the small end of the limiting shoulder is close to the first shaft section relative to the large end of the limiting shoulder; the first thrust bearing is provided with a frustoconical through hole, and the small end of the through hole is close to the first shaft section relative to the large end of the through hole, and the through hole is used to allow the first thrust bearing to be sleeved on the limiting shoulder.
[0009] As a preferred solution of the above-mentioned bearing assembly structure, the contact mode between the outer peripheral wall of the limiting shoulder and the inner peripheral wall of the through hole is line contact.
[0010] As a preferred solution of the above-mentioned bearing assembly structure, on the axial cross section of the connecting shaft, the outer peripheral wall of the limiting shoulder is in a first arc shape from the large end to the small end of the limiting shoulder, and the inner peripheral wall of the through hole is in a second arc shape from the large end to the small end of the through hole;
[0011] The opening of the first arc is opposite to the opening of the second arc, and the first arc is in line contact with the second arc.
[0012] As a preferred solution of the above-mentioned bearing assembly structure, the connecting frame is provided with a first slot and a second slot connected in a stepped manner, the first slot is concave relative to the second slot, the bottom of the second slot forms the limiting end face, and the limiting space includes the second slot;
[0013] The first shaft section is inserted into the first slot, and the limiting shaft shoulder is inserted into the second slot; the slot diameter of the second slot is larger than the outer diameter of the limiting shaft shoulder.
[0014] As a preferred solution of the above-mentioned bearing assembly structure, a first limiting plane is provided on the outer peripheral wall of the first thrust bearing, and a second limiting plane is provided on the inner peripheral wall of the second slot;
[0015] The first limiting plane and the second limiting plane are used to limit the swing angle range of the first thrust bearing relative to the limiting shoulder in the circumferential direction.
[0016] As a preferred solution of the above-mentioned bearing assembly structure, the axial length of the limiting shoulder is greater than or equal to the axial length of the first thrust bearing.
[0017] The wind power gearbox comprises a planetary frame and a supporting pin shaft, and also comprises the above-mentioned bearing assembly structure, wherein the connecting frame is the left end frame of the planetary frame, and the connecting shaft is the supporting pin shaft.
[0018] As a preferred solution of the above-mentioned wind turbine gearbox, the wind turbine gearbox further includes a radial sliding bearing and a planetary gear, and the planetary gear is rotatably connected to the second shaft segment through the radial sliding bearing.
[0019] As a preferred solution of the above-mentioned wind power gearbox, one end of the second shaft segment away from the first shaft segment is plugged and fixed to the right end frame of the planetary frame;
[0020] The wind power gearbox further comprises a second thrust bearing, which is sleeved on the second shaft segment and located between the planetary gear and the right end frame, and is used for bearing the axial force of the planetary gear.
[0021] Beneficial effects of the utility model:
[0022] The utility model provides a bearing assembly structure and a wind power gearbox. The bearing assembly structure includes a connecting frame, a connecting shaft and a first thrust bearing, wherein the connecting shaft includes a first shaft section and a second shaft section connected to each other, the first shaft section is plugged into the connecting frame, the outer peripheral wall of the second shaft section close to one end of the first shaft section is recessed to form a limiting shoulder, and a limiting space is formed between the limiting shoulder and the limiting end face of the connecting frame; the first thrust bearing is sleeved on the limiting shoulder and located in the limiting space; the limiting shoulder can limit the first thrust bearing in the limiting space along the axial direction.
[0023] The bearing assembly structure is provided with a recessed outer wall of one end of the second shaft section close to the first shaft section to form a limiting shoulder, and a limiting space is formed between the limiting shoulder and the limiting end face, and the first thrust bearing is sleeved on the limiting shoulder and confined within the limiting shoulder, so that compared with the prior art, the first thrust bearing can be assembled on the limiting shoulder quickly, efficiently and conveniently, without the need to set connecting parts such as screws, and without the need to open threaded holes on the connecting frame, which can effectively improve the structural strength of the connecting frame, and can also effectively avoid the risk of screw loosening or even failure caused by ambient temperature, etc., effectively improve the service life of the connecting frame and the first thrust bearing, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of a bearing assembly structure provided by a specific embodiment of the utility model;
[0025] Figure 2 This is a partial cross-sectional view of a bearing assembly structure provided by a specific embodiment of the utility model. Figure 1 ;
[0026] Figure 3 It is a cross-sectional view of a first thrust bearing of a bearing assembly structure provided by a specific embodiment of the utility model;
[0027] Figure 4 It is a cross-sectional view of a connecting frame of a bearing assembly structure provided by a specific embodiment of the utility model;
[0028] Figure 5 This is a partial cross-sectional view of a bearing assembly structure provided by a specific embodiment of the utility model. Figure 2 .
[0029] In the figure:
[0030] 1. Connecting frame; 11. First slot; 12. Second slot; 121. Position limiting end surface; 122. Second position limiting plane;
[0031] 2. Connecting shaft; 21. First shaft section; 22. Second shaft section; 221. Position-limiting shaft shoulder; 2211. First arc;
[0032] 3. first thrust bearing; 31. through hole; 32. second arc; 33. first limiting plane;
[0033] 4. Radial sliding bearings;
[0034] 5. Planetary gear;
[0035] 6. Second thrust bearing;
[0036] 7. Right end rack. DETAILED DESCRIPTION
[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "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 or an electrical connection; it can be a direct connection or an indirect connection 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 invention can be understood according to specific circumstances.
[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0041] The utility model provides a bearing assembly structure, such as Figure 1-5As shown, the bearing assembly structure includes a connecting frame 1, a connecting shaft 2 and a first thrust bearing 3, wherein the connecting shaft 2 includes a first shaft segment 21 and a second shaft segment 22 connected to each other, the first shaft segment 21 is plugged into the connecting frame 1, and the outer peripheral wall of the second shaft segment 22 close to one end of the first shaft segment 21 is recessed to form a limiting shoulder 221, and a limiting space is formed between the limiting shoulder 221 and the limiting end face 121 of the connecting frame 1; the first thrust bearing 3 is sleeved on the limiting shoulder 221 and is located in the limiting space; the limiting shoulder 221 can limit the first thrust bearing 3 axially within the limiting space.
[0042] like Figure 1-5 As shown, the bearing assembly structure is provided with a recessed outer wall of one end of the second shaft section 22 close to the first shaft section 21 to form a limiting shoulder 221, and a limiting space is formed between the limiting shoulder 221 and the limiting end face 121, and the first thrust bearing 3 is sleeved on the limiting shoulder 221 and confined in the limiting shoulder 221, so that compared with the prior art, the first thrust bearing 3 can be quickly, efficiently and conveniently assembled on the limiting shoulder 221, without the need to set connecting parts such as screws, and without the need to open threaded holes on the connecting frame 1, which can effectively improve the structural strength of the connecting frame 1, and can also effectively avoid the risk of screw loosening or even failure caused by ambient temperature, etc., effectively improve the service life of the connecting frame 1 and the first thrust bearing 3, and reduce the production cost.
[0043] Among them, Figure 1-3 As shown, the outer peripheral wall of the limiting shoulder 221 is in a frustum shape, and the small end of the limiting shoulder 221 is close to the first shaft section 21 relative to the large end of the limiting shoulder 221; the first thrust bearing 3 is provided with a through hole 31 in a frustum shape, and the small end of the through hole 31 is close to the first shaft section 21 relative to the large end of the through hole 31, and the through hole 31 is used to sleeve the first thrust bearing 3 on the limiting shoulder 221. In this way, the first thrust bearing 3 is axially limited in the limiting space, so that the first thrust bearing can well withstand the axial force.
[0044] It is understandable that the diameter of the second shaft section 22 is greater than the diameter of the first shaft section 21 . The minimum diameter of the limiting shaft shoulder 221 is greater than the diameter of the first shaft section 21 .
[0045] Alternatively, if Figure 1-3 As shown, the contact mode between the outer circumferential wall of the limiting shoulder 221 and the inner circumferential wall of the through hole 31 is line contact. With such a configuration, the first thrust bearing 3 can swing axially relative to the limiting shoulder 221, so that the processing error caused by the processing and manufacturing process of the first thrust bearing 3 and / or the limiting shoulder 221 can be effectively compensated during the running-in process, so that the axial distribution position of the first thrust bearing 3 can be better determined, and the central axis of the first thrust bearing 3 and the central axis of the limiting shoulder 221 can be better defined to be colinear, so as to further improve the working performance and service life of the first thrust bearing 3.
[0046] Specifically, Figure 1-3 As shown, on the axial cross section of the connecting shaft 2, the outer peripheral wall of the limiting shoulder 221 is in a first arc shape 2211 from the large end to the small end of the limiting shoulder 221, and the inner peripheral wall of the through hole 31 is in a second arc shape 32 from the large end to the small end of the through hole 31; the opening of the first arc shape 2211 is opposite to the opening of the second arc shape 32. The first arc shape 2211 and the second arc shape 32 are in line contact. In this way, the contact mode between the outer peripheral wall of the limiting shoulder 221 and the inner peripheral wall of the through hole 31 is line contact, so that the first thrust bearing 3 can swing axially relative to the limiting shoulder 221, so that the processing error caused by the processing and manufacturing process of the first thrust bearing 3 and / or the limiting shoulder 221 can be effectively compensated during the running-in process.
[0047] Specifically, bearing running-in refers to the microscopic running-in of the surfaces of the internal parts of a newly manufactured or reassembled bearing through low-speed and light-load operation before it is put into use for the first time. This process helps to eliminate machining marks, improve surface roughness, evenly distribute the lubricating oil film, and form a stable contact surface, thereby improving the reliability and life of the bearing and reducing the risk of early bearing failure.
[0048] Alternatively, if Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the connecting frame 1 is provided with a first slot 11 and a second slot 12 connected in a stepped manner, the first slot 11 is concave relative to the second slot 12, the bottom of the second slot 12 forms a limiting end face 121, and the limiting space includes the second slot 12; the first shaft section 21 is inserted into the first slot 11, the limiting shoulder 221 is at least partially inserted into the second slot 12, and the slot diameter of the second slot 12 is greater than the outer diameter of the limiting shoulder 221. It can be understood that the limiting shoulder 221 is at least partially inserted into the second slot 12 along the axial direction, and the first thrust bearing 3 is at least partially distributed in the second slot 12 along the axial direction, which can improve the aesthetics of the bearing assembly structure. Secondly, by setting the groove diameter of the second slot 12 to be larger than the outer diameter of the limiting shoulder 221, it is ensured that the first thrust bearing 3 can effectively swing axially relative to the limiting shoulder 221 in the limiting space, and the first thrust bearing 3 can swing circumferentially relative to the limiting shoulder 221, so that the processing error caused by the processing and manufacturing process of the first thrust bearing 3 and / or the limiting shoulder 221 can be better compensated during the running-in process, so that the axial distribution position of the first thrust bearing 3 can be better determined, and the central axis of the first thrust bearing 3 and the central axis of the limiting shoulder 221 can be better defined to be colinear, so as to further improve the service life of the first thrust bearing 3. It can be understood that the second slot 12 is part of the limiting space.
[0049] Specifically, the first shaft section 21 abuts against the bottom wall of the first slot 11 after being inserted into position in the axial direction. And / or, the second shaft section 22 abuts against the bottom wall of the second slot 12 after being inserted into position in the axial direction. Both can well define the distribution position of the connecting shaft 2 in the axial direction. In this embodiment, Figure 1 and Figure 2 As shown, the first shaft segment 21 is exemplarily arranged to abut against the bottom wall of the first slot 11 after being inserted into place along the axial direction.
[0050] Further optionally, if Figure 5 As shown, a first limiting plane 33 is provided on the outer peripheral wall of the first thrust bearing 3, and a second limiting plane 122 is provided on the inner peripheral wall of the second slot 12; the first limiting plane 33 and the second limiting plane 122 are used to limit the swing angle range of the first thrust bearing 3 relative to the limiting shoulder 221 in the circumferential direction. By limiting the swing angle range of the first thrust bearing 3 relative to the limiting shoulder 221 in the circumferential direction, the first thrust bearing 3 can swing slightly relative to the limiting shoulder 221 in the circumferential direction.
[0051] It can be understood that the central axis of the first thrust bearing 3 swinging in the circumferential direction relative to the limiting shoulder 221 is the central axis of the limiting shoulder 221 .
[0052] Specifically, Figure 5 As shown, when the first thrust bearing 3 is not subjected to external force, the first limiting plane 33 and the second limiting plane 122 are parallel and spaced apart. When the first thrust bearing 3 is subjected to circumferential rotational force, the first thrust bearing 3 is driven to swing circumferentially relative to the limiting shoulder 221, so that the first limiting plane 33 and the second limiting plane 122 are distributed at an angle. When any connection between the first limiting plane 33 and the arc-shaped outer peripheral wall of the first thrust bearing 3 abuts against the second limiting plane 122, the first thrust bearing 3 can no longer continue to swing circumferentially relative to the limiting shoulder 221 under the action of the circumferential rotational force. This is to achieve a swing range that can limit the circumferential swing of the first thrust bearing 3 relative to the limiting shoulder 221. It can be understood that there are two connections between the first limiting plane 33 and the arc-shaped outer peripheral wall of the first thrust bearing 3.
[0053] Optionally, the axial length of the limiting shoulder 221 is greater than or equal to the axial length of the first thrust bearing 3. Figure 2 As shown, the axial length of the exemplary limiting shoulder 221 is substantially equal to the axial length of the first thrust bearing 3 .
[0054] The utility model also provides a wind power gearbox, including a planetary frame and a supporting pin shaft, and also includes the above-mentioned bearing assembly structure, the connecting frame 1 is the left end frame of the planetary frame, and the connecting shaft 2 is the supporting pin shaft.
[0055] By adopting the above-mentioned bearing assembly structure, the service life of the planet carrier and the first thrust bearing 3 can be effectively improved, the production cost can be reduced, and assembly and disassembly are convenient.
[0056] Specifically, Figure 1 As shown, the wind turbine gearbox further includes a radial sliding bearing 4 and a planetary gear 5, and the planetary gear 5 is rotatably connected to the second shaft section 22 through the radial sliding bearing 4. In order to realize that the planetary gear 5 is rotatably connected to the planetary carrier. It can be understood that the planetary gear 5 applies an axial force to the first thrust bearing 3.
[0057] Furthermore, if Figure 1 As shown, one end of the second shaft section 22 away from the first shaft section 21 is plugged and fixed to the right end frame 7 of the planetary frame; the wind power gearbox also includes a second thrust bearing 6, which is sleeved on the second shaft section 22 and located between the planetary gear 5 and the right end frame 7, and the second thrust bearing 6 is used to bear the axial force of the planetary gear 5, so as to realize the assembly of a single planetary gear 5.
[0058] Specifically, the second thrust bearing 6 has the same structure as the first thrust bearing 3, and the assembly method of the second thrust bearing 6 is the same as the assembly method of the first thrust bearing 3. Or, the second thrust bearing 6 is sleeved in the second shaft section 22 with clearance, and is connected to the end face of the planetary gear 5 away from the first thrust bearing 3 by screws. Or, the second thrust bearing 6 is sleeved in the second shaft section 22 with clearance, and is connected to the right end frame 7 by screws. Or, the second thrust bearing 6 is sleeved in the second shaft section 22 with transition. All of these enable the second thrust bearing 6 to effectively withstand the axial force. Figure 1 As shown, in this embodiment, the second thrust bearing 6 is exemplarily provided with a clearance sleeve on the second shaft section 22 and is connected to the right end frame 7 by screws.
[0059] Specifically, the right end frame 7 is provided with a plug hole, and the second shaft section 22 is plugged into the plug hole. The wind power gearbox also includes an axial retaining ring, which is partially embedded in the inner circumferential wall of the plug hole along the circumferential direction and abuts against the second shaft section 22 along the axial direction to achieve the setting position of the fixed support pin shaft.
[0060] Preferably, the left end frame and the right end frame of the planetary frame are integrally formed, which can reduce the number of parts and improve the structural strength of the planetary frame.
[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. Bearing assembly structure, characterized in that: include: A connecting frame (1) and a connecting shaft (2), wherein the connecting shaft (2) comprises a first shaft section (21) and a second shaft section (22) connected to each other, the first shaft section (21) being plugged into the connecting frame (1), and an outer peripheral wall of the second shaft section (22) near one end of the first shaft section (21) being recessed to form a limiting shaft shoulder (221), and a limiting space being formed between the limiting shaft shoulder (221) and a limiting end surface (121) of the connecting frame (1); The first thrust bearing (3) is sleeved on the limiting shaft shoulder (221) and is located in the limiting space; the limiting shaft shoulder (221) limits the first thrust bearing (3) in the limiting space along the axial direction.
2. The bearing assembly structure according to claim 1, characterized in that: The outer peripheral wall of the limiting shoulder (221) is in a frustoconical shape, and the small end of the limiting shoulder (221) is closer to the first shaft section (21) relative to the large end of the limiting shoulder (221); the first thrust bearing (3) is provided with a through hole (31) in a frustoconical shape, and the small end of the through hole (31) is closer to the first shaft section (21) relative to the large end of the through hole (31), and the through hole (31) is used to enable the first thrust bearing (3) to be sleeved on the limiting shoulder (221).
3. The bearing assembly structure according to claim 2, characterized in that: The contact mode between the outer peripheral wall of the limiting shoulder (221) and the inner peripheral wall of the through hole (31) is line contact.
4. The bearing assembly structure according to claim 3, characterized in that: On the axial cross section of the connecting shaft (2), the outer peripheral wall of the limiting shoulder (221) is in a first arc shape (2211) from the large end to the small end of the limiting shoulder (221), and the inner peripheral wall of the through hole (31) is in a second arc shape (32) from the large end to the small end of the through hole (31); The opening of the first arc (2211) is opposite to the opening of the second arc (32), and the first arc (2211) is in line contact with the second arc (32).
5. The bearing assembly structure according to claim 1, characterized in that: The connecting frame (1) is provided with a first slot (11) and a second slot (12) which are connected in a stepped manner, the first slot (11) is concave relative to the second slot (12), the bottom of the second slot (12) forms the limiting end surface (121), and the limiting space includes the second slot (12); The first shaft section (21) is plugged into the first slot (11), and the limiting shaft shoulder (221) is plugged into the second slot (12); the slot diameter of the second slot (12) is larger than the outer diameter of the limiting shaft shoulder (221).
6. The bearing assembly structure according to claim 5, characterized in that: A first limiting plane (33) is provided on the outer peripheral wall of the first thrust bearing (3), and a second limiting plane (122) is provided on the inner peripheral wall of the second slot (12); The first limiting plane (33) and the second limiting plane (122) are used to limit the swing angle range of the first thrust bearing (3) relative to the limiting shoulder (221) in the circumferential direction.
7. The bearing assembly structure according to any one of claims 1 to 6, characterized in that: The axial length of the limiting shaft shoulder (221) is greater than or equal to the axial length of the first thrust bearing (3).
8. A wind turbine gearbox, comprising a planet carrier and a support pin, characterized in that: It also includes the bearing assembly structure according to any one of claims 1 to 7, wherein the connecting frame (1) is the left end frame of the planetary frame, and the connecting shaft (2) is the supporting pin shaft.
9. The wind turbine gearbox according to claim 8, characterized in that: The wind turbine gearbox further comprises a radial sliding bearing (4) and a planetary gear (5), wherein the planetary gear (5) is rotatably connected to the second shaft section (22) via the radial sliding bearing (4).
10. The wind turbine gearbox according to claim 9, characterized in that: One end of the second shaft section (22) away from the first shaft section (21) is plugged and fixed to the right end frame (7) of the planetary frame; The wind turbine gearbox further comprises a second thrust bearing (6), which is sleeved on the second shaft section (22) and located between the planetary gear (5) and the right end frame (7), and the second thrust bearing (6) is used to bear the axial force of the planetary gear (5).