Gear box assembly of wind turbine generator

Abstract

The utility model discloses a wind turbine generator gearbox assembly which is characterized in that first annular grooves are formed in the two end faces of a first inner ring, first roller rings are coaxially embedded in the first annular grooves, one first roller ring rotationally abuts against the end face of a first check ring, and the other first roller ring rotationally abuts against the end face of a second check ring; a second annular groove is formed in the second inner ring, a second roller ring is coaxially embedded in the second annular groove, and the second roller ring rotationally abuts against the end face, away from the first inner ring, of the second check ring; the inner peripheral edge of the first inner ring extends to the inner peripheral side of the first center hole and is fixedly connected to the planet wheel assembly. A connecting part of an annular structure is connected between the first inner ring and the second inner ring, the connecting part is located in the second center hole, a third annular groove is formed in the outer circumferential wall of the connecting part, a third roller ring is coaxially embedded in the third annular groove, and the third roller ring rotationally abuts against the inner circumferential wall of the second center hole; and the stability and firmness of the whole structure in long-term use can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine sets, in particular to a gear box assembly of a wind turbine set. Background Art

[0002] The traditional connection method between the main shaft components and the gearbox of a high-power wind turbine is: the main shaft is supported by two bearings, and the two bearings are respectively supported by two bearing support seats (in other solutions, the two bearings can also be supported by an integral bearing support seat), and then connected to the gearbox through a locking plate or an end face flange. The system is large in size, heavy in weight, and high in cost. Utility Model Content

[0003] The purpose of the utility model is to provide a wind turbine gearbox assembly to solve the problems existing in the above-mentioned prior art. Compared with the traditional structure, the main shaft, split or integral bearing seat are omitted, the machine base structure is simplified, the integrated structure is bolted to the machine base, and the assembly is simple and reliable.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solutions: The utility model provides a wind turbine gearbox assembly, comprising a shell in a cylindrical structure; the shell is divided into a gearbox section and a bearing section along its axis direction; a planetary gear assembly is provided in the gearbox section, and a bearing assembly is provided in the bearing section;

[0005] The bearing assembly comprises a first retaining ring, a first inner ring, a second retaining ring and a second inner ring, all of which are coaxially arranged with the bearing section and arranged in sequence in a direction away from the gear box section;

[0006] Both end surfaces of the first inner ring are provided with first annular grooves coaxial therewith, and each of the first annular grooves is coaxially embedded with a first roller ring, one of the first roller rings is rotatably abutted against the end surface of the first retaining ring, and the other first roller ring is rotatably abutted against the end surface of the second retaining ring;

[0007] A second annular groove is coaxially formed on the end surface of the second inner ring close to the second retaining ring, a second roller ring is coaxially embedded in the second annular groove, and the second roller ring is rotatably abutted against the end surface of the second retaining ring away from the first inner ring;

[0008] The first retaining ring has a first center hole, and the inner peripheral edge of the first inner ring extends to the inner peripheral side of the first center hole and is fixedly connected to the planetary gear assembly;

[0009] The second retaining ring is detachably mounted on the inner circumferential wall of the bearing segment and has a second center hole. A connecting portion with an annular structure is connected between the first inner ring and the second inner ring. The connecting portion is located in the second center hole, and a third annular groove coaxial with the second center hole is formed on its outer circumferential wall. A third roller ring is coaxially embedded in the third annular groove, and the third roller ring rotates and abuts against the inner circumferential wall of the second center hole.

[0010] Preferably, the outer circumferential wall of the second retaining ring is in contact with the inner circumferential wall of the bearing segment, and the second retaining ring is provided with a plurality of step holes equally spaced along its circumference, each of the step holes radially penetrates the second retaining ring, and each of the step holes is inserted with a first fixing bolt threadedly connected to the bearing segment, and each of the first fixing bolts is provided with a nut structure extending into the step hole, and the nut structure abuts against the step structure in the step hole.

[0011] Preferably, the outer peripheral edge of one end of the step hole corresponding to the inner peripheral wall of the second retaining ring is provided with a chamfered structure.

[0012] Preferably, the connecting portion includes a first annular flange and a second annular flange which are respectively integrally formed with the first retaining ring and the second retaining ring, and the first annular flange and the second annular flange are both located on the inner circumference side of the second center hole and are opposite to each other.

[0013] Preferably, the connecting portion is equipped with a plurality of second fixing bolts, which are evenly distributed along the circumference of the second inner ring, pass through the second inner ring axially, and are sequentially connected to the second annular flange and the first annular flange.

[0014] Preferably, a third annular flange is coaxially provided on the end surface of the first inner ring close to the first retaining ring. The third annular flange is located on the inner circumference side of the first center hole and is detachably connected to the planetary gear assembly.

[0015] Preferably, the third annular flange is located on the inner circumference side of the first annular flange, and a third fixing bolt connected to the planetary gear assembly penetrates the third annular flange along its axial direction.

[0016] Preferably, the radial clearance of the first roller ring, the second roller ring and the third roller ring is ≤0 mm.

[0017] Preferably, the planetary gear assembly includes an inner ring gear and a primary planet carrier, the inner ring gear is fixedly connected to the gear box section, the primary planet carrier is arranged in the gear box section, the primary planet carrier can rotate relative to the gear box section, and the third annular flange is connected to the primary planet carrier.

[0018] Preferably, the planetary gear assembly includes an inner ring gear and a primary planet carrier, the inner ring gear is arranged in the gear box section, the inner ring gear can rotate relative to the gear box section, the primary planet carrier is fixedly connected to the gear box section, and the third annular flange is connected to the inner ring gear.

[0019] Compared with the prior art, the utility model has achieved the following technical effects:

[0020] The wind turbine gearbox assembly disclosed in the utility model is provided with a first retaining ring, a first inner ring, a second retaining ring and a second inner ring, and is equipped with multiple sets of roller rings. The structural rigidity is good, and the relative deformation of the housing and the two inner rings is extremely small, which can meet the good load transmission under the rigid connection between the planetary gear assembly and the bearing assembly. Compared with the traditional structure, this structure saves the main shaft, the split or integral bearing seat, and the whole assembly structure is more simplified, and the assembly is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is Example 1 of the overall structural schematic diagram of the utility model;

[0023] Figure 2 This is Example 2 of the overall structural schematic diagram of the utility model;

[0024] Among them, 1-housing, 2-second inner ring, 3-first inner ring, 4-second retaining ring, 5-first retaining ring, 6-second roller ring, 7-first roller ring A, 8-first roller ring B, 9-third roller ring, 10-inner gear ring, 11-first planetary carrier. DETAILED DESCRIPTION

[0025] Please write a specific implementation method. The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The purpose of the utility model is to provide a wind turbine gearbox assembly to solve the problems existing in the above-mentioned prior art. Compared with the traditional structure, the main shaft, split or integral bearing seat are omitted, the machine base structure is simplified, the integrated structure is bolted to the machine base, and the assembly is simple and reliable.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figure 1 to Figure 2 As shown, this embodiment provides a wind turbine gearbox assembly, including a shell 1 with a cylindrical structure; the shell 1 is divided into a gearbox section and a bearing section along its axis; a planetary gear assembly is provided in the gearbox section, and a bearing assembly is provided in the bearing section;

[0029] The bearing assembly includes a first retaining ring 5, a first inner ring 3, a second retaining ring 4 and a second inner ring 2, which are all coaxially arranged with the bearing section and arranged in sequence in a direction away from the gear box section;

[0030] Both end faces of the first inner ring 3 are provided with first annular grooves coaxial therewith, and a first roller ring is coaxially embedded in each first annular groove, and is divided into a first roller ring A7 and a first roller ring B8. The first roller ring includes a retaining frame with a circular structure, and a plurality of first rollers are arranged in a circumferential array on the retaining frame. The first rollers extend radially along the bearing section. One first roller ring rotates and abuts against the end face of the first retaining ring 5, and the other first roller ring rotates and abuts against the end face of the second retaining ring 4, so that the first inner ring 3 can be rotatably installed between the first retaining ring 5 and the second retaining ring 4; specifically, the first retaining ring 5 is sealed at the notch of the first annular groove, and the second retaining ring 4 is sealed at the notch of the other annular groove, so as to respectively form relatively closed spaces for accommodating the first roller rings.

[0031] A second annular groove is coaxially opened on the end face of the second inner ring 2 close to the second retaining ring 4, and a second roller ring 6 is coaxially embedded in the second annular groove. The second roller ring 6 includes a retaining frame with a circular structure, and a plurality of second rollers are arranged in a circumferential array on the retaining frame. The second rollers extend in the radial direction of the bearing section, and the second roller ring 6 rotates and abuts against the end face of the second retaining ring 4 away from the first inner ring 3; specifically, the other end face of the second retaining ring 4 is sealed at the notch of the second annular groove to form a relatively closed space for accommodating the second roller ring 6.

[0032] Moreover, the first retaining ring 5 has a first center hole, the inner peripheral edge of the first inner ring 3 extends to the inner peripheral side of the first center hole, and is fixedly connected to the planetary gear assembly to achieve the connection between the first inner ring 3 and the planetary gear assembly, and avoid the interference of the first retaining ring 5 on the rotation of the first inner ring 3;

[0033] The second retaining ring 4 is detachably mounted on the inner circumferential wall of the bearing section and has a second center hole. A connecting portion in an annular structure is connected between the first inner ring 3 and the second inner ring 2. The first inner ring 3 and the second inner ring 2 are connected through the connecting portion, so that the second inner ring 2 drives the first inner ring 3 to rotate during the rotation process. The connecting portion is located in the second center hole, and a third annular groove coaxial with the second center hole is opened on its outer circumferential wall. A third roller ring 9 is coaxially embedded in the third annular groove. The third roller ring 9 includes a retaining frame in a circular structure. A plurality of third rollers are arranged in a circumferential array on the retaining frame. The third rollers extend along the axial direction of the bearing section. The third roller ring 9 rotates and abuts against the inner circumferential wall of the second center hole, and the inner circumferential wall of the specific second center hole is blocked on the outer circumferential side of the third annular groove to form a relatively closed space for accommodating the third roller ring 9. Preferably, the radial clearance of the first roller ring, the second roller ring 6 and the third roller ring 9 is ≤0 mm.

[0034] Since the first inner ring 3 is fixedly connected to the planetary gear assembly, the first inner ring 3 can drive the planetary gear assembly to rotate when it rotates. After the planetary gear assembly increases the speed, the output end of the planetary gear assembly outputs the high speed to the generator to drive the generator to generate electricity. The wind turbine gearbox assembly disclosed in the utility model has an integrated structure that eliminates the main shaft, split or integral bearing seats, is simple to assemble, greatly reduces the system weight and structural size, and reduces the structural cost.

[0035] Further preferably, the shell 1 is an integrally formed structure. By providing an integrally formed shell 1, the planetary gear assembly and the bearing assembly are integrated in the shell 1, so that when the first inner ring 3 and the second inner ring 2 are connected to the wind blade structure, the transmission is directly completed in the shell 1, and there is no need to divide the shell 1 into two parts corresponding to the planetary gear assembly and the bearing assembly. This avoids the possibility of breakage at the connection during long-term use after the two are connected, thereby ensuring the stability and firmness of the entire wind turbine gearbox assembly.

[0036] As another preferred embodiment, the gear box section and the bearing section may also be detachably connected via flanges and installed in a split structure, which makes the manufacturing simpler and the combined installation more convenient.

[0037] Further, the outer peripheral wall of the second retaining ring 4 is fitted on the inner peripheral wall of the bearing section, and the second retaining ring 4 is provided with a plurality of stepped holes distributed at equal intervals along its circumference, the end with a larger inner diameter of the stepped hole is close to the inner peripheral side of the second retaining ring 4, and the smaller end is close to the outer peripheral side of the second retaining ring 4, each stepped hole penetrates the second retaining ring 4 in the radial direction, and each stepped hole is inserted with a first fixing bolt threadedly connected to the bearing section, and a blind hole is provided at a corresponding position of the inner peripheral wall of the specific bearing section, and the first fixing bolt is threadedly connected to the blind hole after passing through the step hole, and each first fixing bolt is provided with a nut structure extending into the step hole, and the specific nut structure is located inside the larger end of the step hole, and the nut structure abuts against the step structure in the step hole, so as to complete the connection work between the second retaining ring 4 and the bearing section through the first fixing bolt. In the process of installing the second retaining ring 4, the first fixing bolt is installed through the interval between the connecting portion and the second retaining ring 4.

[0038] As a preferred embodiment of the utility model, the outer peripheral edge of one end of the step hole corresponding to the inner peripheral wall of the second retaining ring 4 is provided with a chamfered structure. By providing the chamfered structure, the wear of the open end of the step hole on the third roller can be fully avoided. Preferably, the end of the step hole corresponding to the inner peripheral wall of the second retaining ring 4 is a sunken structure to further reduce the contact between the open end of the step hole and the third roller to avoid wear.

[0039] Furthermore, the connection portion includes a first annular flange and a second annular flange which are respectively integrally formed with the first retaining ring 5 and the second retaining ring 4, the first annular flange and the second annular flange are both located on the inner circumference side of the second center hole and are in contact with each other, and annular grooves are coaxially provided on the outer circumferential walls of the first annular flange and the second annular flange, respectively, and the two annular grooves are spliced ​​into a third annular groove after the first annular flange and the second annular flange are connected. Specifically, during the specific installation process of the second retaining ring 4, the first retaining ring 5 is first installed and the first fixing bolt is installed by using the interval between the first annular flange and the second retaining ring 4. After the connection is completed, the second retaining ring 4 is installed.

[0040] Among them, the connection part is equipped with multiple second fixing bolts, the second fixing bolts are evenly distributed along the circumference of the second inner ring 2, and penetrate the second inner ring 2 axially, and are connected to the second annular flange and the first annular flange in sequence, so as to complete the connection between the first inner ring 3 and the second inner ring 2 through the second fixing bolts. Specifically, the second inner ring 2 is provided with multiple through holes penetrating along the axial direction, and each through hole is evenly distributed along the circumference of the second inner ring 2, and the second annular flange is provided with multiple through holes, which correspond to each through hole on the second inner ring 2 one by one and are coaxially connected. The first annular flange is provided with multiple blind holes, which correspond to each through hole on the second annular flange one by one and are coaxially connected. Then, the second fixing bolts pass through the through holes on the second inner ring 2 and the second annular flange in sequence, and are correspondingly connected to the blind holes on the first annular flange.

[0041] Furthermore, a third annular flange is coaxially provided on the end face of the first inner ring 3 close to the first retaining ring 5. The third annular flange is located on the inner circumferential side of the first center hole and is detachably connected to the planetary gear assembly to achieve the connection between the first inner ring 3 and the planetary gear assembly, so that when the first inner ring 3 rotates, it can drive the rotation of the planetary gear assembly. Preferably, the third annular flange is located on the inner circumferential side of the first annular flange, and the third annular flange is penetrated by third fixing bolts connected to the planetary gear assembly along its axial direction. The third fixing bolts are evenly spaced along the circumference of the third annular flange, and the third annular flange is connected to the planetary gear assembly by the third fixing bolts. The third annular flange is provided so as to be able to contact the planetary gear assembly, thereby ensuring the strength of the third fixing bolts locking the third annular flange and the planetary gear assembly.

[0042] As a preferred embodiment of the utility model, there are two transmission modes of the planetary gear assembly, one is to actively rotate the first-stage planet carrier 11 to drive the rotation of the inner ring 10, and the other is to actively rotate the inner ring 10 to drive the rotation of the first-stage planet carrier 11. As one of the preferred embodiments, the planetary gear assembly includes an inner ring 10 and a first-stage planet carrier 11, the inner ring 10 is fixedly connected to the gear box section, the first-stage planet carrier 11 is arranged in the gear box section, the first-stage planet carrier 11 can rotate relative to the gear box section, the third annular flange is connected to the first-stage planet carrier 11, and the rotation speed is transmitted to the first-stage planet carrier 11 through the third annular flange on the first inner ring 3, and the energy and rotation speed are transmitted to the second-stage planetary stage through the sun gear of the planetary gear assembly. The planetary gear assembly can be a multi-stage planetary transmission or a planet + parallel stage transmission, and finally the energy and speed are transmitted to the generator through the last stage sun gear or parallel shaft. As another preferred embodiment, the planetary gear assembly includes an inner ring gear 10 and a first-stage planet carrier 11. The inner ring gear 10 is arranged in the gear box section. The inner ring gear 10 can rotate relative to the gear box section. The first-stage planet carrier 11 is fixedly connected to the gear box section. The third annular flange is connected to the inner ring gear 10 to drive the inner ring gear 10 to rotate, and then transfer the energy and speed to the second-stage planetary stage through the sun gear of the planetary gear assembly. The planetary gear assembly can be a multi-stage planetary transmission or a planetary + parallel stage transmission, and finally the energy and speed are transferred to the generator through the last stage sun gear or parallel shaft.

[0043] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0044] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0045] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A wind turbine gearbox assembly, characterized in that: It comprises a shell with a cylindrical structure; the shell is divided into a gear box section and a bearing section along its axial direction; a planetary gear assembly is arranged in the gear box section, and a bearing assembly is arranged in the bearing section; The bearing assembly comprises a first retaining ring, a first inner ring, a second retaining ring and a second inner ring, all of which are coaxially arranged with the bearing section and arranged in sequence in a direction away from the gear box section; Both end surfaces of the first inner ring are provided with first annular grooves coaxial therewith, and each of the first annular grooves is coaxially embedded with a first roller ring, one of the first roller rings is rotatably abutted against the end surface of the first retaining ring, and the other first roller ring is rotatably abutted against the end surface of the second retaining ring; A second annular groove is coaxially formed on the end surface of the second inner ring close to the second retaining ring, a second roller ring is coaxially embedded in the second annular groove, and the second roller ring is rotatably abutted against the end surface of the second retaining ring away from the first inner ring; The first retaining ring has a first center hole, and the inner peripheral edge of the first inner ring extends to the inner peripheral side of the first center hole and is fixedly connected to the planetary gear assembly; The second retaining ring is detachably mounted on the inner circumferential wall of the bearing segment and has a second center hole. A connecting portion with an annular structure is connected between the first inner ring and the second inner ring. The connecting portion is located in the second center hole, and a third annular groove coaxial with the second center hole is formed on its outer circumferential wall. A third roller ring is coaxially embedded in the third annular groove, and the third roller ring rotates and abuts against the inner circumferential wall of the second center hole.

2. The wind turbine gearbox assembly according to claim 1, characterized in that: The outer circumferential wall of the second retaining ring is fitted on the inner circumferential wall of the bearing segment, and the second retaining ring is provided with a plurality of step holes evenly spaced along its circumference, each of the step holes radially penetrates the second retaining ring, and each of the step holes is inserted with a first fixing bolt threadedly connected to the bearing segment, and each of the first fixing bolts is provided with a nut structure extending into the step hole, and the nut structure abuts against the step structure in the step hole.

3. The wind turbine gearbox assembly according to claim 2, characterized in that: An outer peripheral edge of one end of the step hole corresponding to the inner peripheral wall of the second retaining ring is provided with a chamfered structure.

4. The wind turbine gearbox assembly according to claim 2 or 3, characterized in that: The connecting portion includes a first annular flange and a second annular flange which are respectively integrally formed with the first retaining ring and the second retaining ring. The first annular flange and the second annular flange are both located on the inner circumference side of the second center hole and are in contact with each other.

5. The wind turbine gearbox assembly according to claim 4, characterized in that: The connection portion is equipped with a plurality of second fixing bolts, which are evenly spaced along the circumference of the second inner ring, penetrate the second inner ring axially, and are sequentially connected to the second annular flange and the first annular flange.

6. The wind turbine gearbox assembly according to claim 5, characterized in that: A third annular flange is coaxially provided on the end surface of the first inner ring close to the first retaining ring. The third annular flange is located on the inner circumference of the first center hole and is detachably connected to the planetary gear assembly.

7. The wind turbine gearbox assembly according to claim 6, characterized in that: The third annular flange is located on the inner circumference side of the first annular flange, and a third fixing bolt connected to the planetary gear assembly penetrates through the third annular flange along its axial direction.

8. The wind turbine gearbox assembly according to claim 7, characterized in that: The radial clearance of the first roller ring, the second roller ring and the third roller ring is ≤0 mm.

9. The wind turbine gearbox assembly according to claim 8, characterized in that: The planetary gear assembly includes an inner ring gear and a primary planet carrier, the inner ring gear is fixedly connected to the gear box section, the primary planet carrier is arranged in the gear box section, the primary planet carrier can rotate relative to the gear box section, and the third annular flange is connected to the primary planet carrier.

10. The wind turbine gearbox assembly according to claim 8, characterized in that: The planetary gear assembly includes an inner ring gear and a primary planet carrier. The inner ring gear is arranged in the gear box section and can rotate relative to the gear box section. The primary planet carrier is fixedly connected to the gear box section, and the third annular flange is connected to the inner ring gear.

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