CN210889998U - Assembly structure of sun gear shaft and spline shaft of wind power gearbox - Google Patents

Abstract

The utility model discloses an assembly structure of a sun gear shaft and a spline shaft of a wind power gearbox, which belongs to the technical field of wind power gearboxes. The assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox includes: a sun gear shaft; a spline shaft, the spline shaft is a hollow shaft, one end of the sun gear shaft penetrates into the spline shaft, and the sun gear shaft The end that penetrates into the spline shaft is connected with the spline shaft through the spline pair; the mechanical pump drive gear is installed on one end of the spline shaft, and the inner diameter is smaller than the inner diameter of the spline shaft; the spacer ring , the spacer ring is arranged in the spline shaft, and one end of the spacer ring abuts on the inner side of the mechanical pump drive gear, and is fixedly connected with the mechanical pump drive gear, the spacer The other end of the ring is spaced from the end of the sun gear shaft within the splined shaft. The utility model shares the axial force of the sun gear shaft by arranging the distance ring, which can reduce the axial wear between the sun gear shaft and the spline shaft.

Description

Assembly structure of sun gear shaft and spline shaft of wind power gearbox

technical field

The utility model relates to the technical field of wind power gearboxes, in particular to an assembly structure of a sun gear shaft and a spline shaft of a wind power gearbox.

Background technique

Compared with thermal power generation and hydropower generation, wind power generation has great advantages. Vigorously developing wind power generation is of great significance to national economic construction and environmental protection. In wind turbines, gearboxes are the key components of wind turbines. The gearbox in the wind turbine has the characteristics of large transmission load and long working time. Once a failure occurs, the maintenance cost is extremely high.

Gearboxes in medium and large megawatt wind turbines generally use planetary transmission and parallel transmission structure. Parallel transmission means that the sun gear shaft is connected with the spline shaft through splines, and the spline shaft and the sun gear shaft are arranged in parallel to realize torque transmission. . Generally, the planetary sun gear shaft meshes with the planetary gear through helical teeth, which can bear a larger load, but the sun gear shaft will generate a large axial force, so that the wear of the sun gear shaft and the spline shaft is large. And the sun gear shaft is generally designed to be floating, in order to balance the load transmitted by the multiple planetary gears, so the sun gear shaft and the spline shaft have fretting when running, which will also cause wear between the sun gear shaft and the spline shaft. If the wear between the sun gear shaft and the spline shaft continues to develop, it will cause the sun gear shaft to be axially misaligned, which in turn will cause the sun gear shaft tooth surface meshing to shift axially, and eventually lead to complete damage to the gearbox.

Therefore, the existing technology still needs to be improved and developed.

Utility model content

The purpose of the utility model is to provide an assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox, so as to solve the problem that the axial force of the sun gear shaft of the wind power gear box in the prior art is too large, resulting in the friction between the sun gear shaft and the spline shaft. Increased wear and tear, which in turn leads to problems with gearbox damage.

For this purpose, the utility model adopts the following technical solutions:

An assembly structure of a sun gear shaft and a spline shaft of a wind power gearbox, comprising:

sun gear shaft;

Spline shaft, the spline shaft is a hollow shaft, one end of the sun gear shaft penetrates into the spline shaft, and one end of the sun gear shaft penetrates the spline shaft and the spline shaft passes through the spline shaft key pair connection;

A mechanical pump driving gear is installed at one end of the spline shaft, and the inner diameter is smaller than the inner diameter of the spline shaft;

A spacer ring, the spacer ring is arranged in the spline shaft, and one end of the spacer ring abuts on the inner side of the mechanical pump drive gear, and is fixedly connected with the mechanical pump drive gear, so The other end of the distance ring is spaced apart from the end of the sun gear shaft located in the spline shaft.

Optionally, the spacer ring includes a spacer ring side wall parallel to the spline shaft, and a spacer ring bottom perpendicular to the spline shaft; the spacer ring side wall abuts on the The inner side of the mechanical pump driving gear is fixedly connected with the mechanical pump driving gear; the bottom of the spacer ring is spaced from the end of the sun gear shaft located in the spline shaft.

Optionally, one end of the side wall of the spacer ring connected to the mechanical pump drive gear is provided with a first bolt hole, and the first bolt hole is arranged along the axial direction of the spacer ring, and the mechanical pump A second bolt hole is provided on the driving gear corresponding to the first bolt hole, and the first bolt is inserted into the second bolt hole and the first bolt hole, so that the spacer ring is fixed on the Mechanical pump drive gear.

Optionally, the outer surface of the spacer ring and the inner wall of the spline shaft are arranged at intervals, and a first oil return hole is arranged on the mechanical pump drive gear corresponding to the clearance.

Optionally, the spline shaft is provided with a shoulder, the sun gear shaft is provided with a step surface that cooperates with the shoulder, and the shoulder abuts on the step surface, so that the sun gear The axle is positioned axially.

Optionally, the shoulder is located between the spline pair and the spacer ring, the shoulder is provided with a second oil return hole, and the second oil return hole is along the spline shaft. Axial setting.

Optionally, a tube shaft is also included, the sun gear shaft is a hollow shaft, and the tube shaft is penetrated in the shaft hole of the sun gear shaft.

Optionally, the inner diameter of the spacer ring is larger than the outer diameter of the pipe shaft.

Optionally, it also includes a first gear, an output shaft and a mechanical pump, the first gear meshes with the mechanical pump driving gear, one end of the output shaft is connected to the first gear, and the other end is connected to the mechanical pump. Pump connection.

Optionally, a second bolt is also included, and the mechanical pump driving gear is mounted on the spline shaft through the second bolt.

The beneficial effects of the present utility model:

In the utility model, a spacer ring is arranged in the assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox, and one end of the spacer ring is close to the sun gear shaft. It rests on the spacer ring, so that the spacer ring shares a part of the axial force, reduces the wear between the sun gear shaft and the spline shaft, avoids the failure of the gearbox, and prolongs the service life of the gearbox.

Description of drawings

1 is a three-dimensional schematic diagram of the assembly structure of the sun gear shaft and the spline shaft of the wind turbine gearbox of the present invention;

Fig. 2 is an enlarged view of part A in Fig. 1 of the present utility model.

In the picture:

10-sun gear shaft; 20-spline shaft; 30-spacer ring; 40-mechanical pump drive gear; 50-first bolt; 60-pipe shaft; 70-first gear; 80-output shaft; 90-second bolt;

11-step surface; 21-spline pair; 22-shoulder; 221-second oil return hole; 31-spacer side wall; 32-spacer bottom; 311-first bolt hole; 41-second Bolt hole; 42-The first oil return hole.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or a fixed 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, and it can be an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

The utility model provides an assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox. The structure includes a sun gear shaft 10 , a spline shaft 20 , a mechanical pump drive gear 40 and a spacer ring 30 .

The spline shaft 20 is a hollow shaft, one end of the sun gear shaft 10 penetrates into the spline shaft 20 , and one end of the sun gear shaft 10 which penetrates the spline shaft 20 is connected with the spline shaft 20 through the spline pair 21 . The mechanical pump drive gear 40 is installed at one end of the spline shaft 20, the mechanical pump drive gear 40 is fixedly connected with the spline shaft 20, and rotates synchronously under the drive of the spline shaft 20, and drives the gearbox mechanical pump through the mechanical pump drive gear 40. Rotating, gearbox mechanical pump is a kind of gearbox oil pump. The inner diameter of the mechanical pump drive gear 40 is smaller than the inner diameter of the spline shaft 20, so that the inner ring of the mechanical pump drive gear 40 can protrude from the inner wall of the spline shaft 20, as shown in FIG. Ring 30.

In the existing gear box, there is also a structure in which the mechanical pump drive gear 40 is installed at one end of the spline shaft 20, but there is no spacer 30 in the existing structure, so the inner diameter of the mechanical pump drive gear 40 in the existing structure is the same as the one. The inner diameter of the spline shaft 20 is set to be the same size. In the present invention, the positioning and installation of the spacer ring 30 can be completed only by making the inner diameter of the mechanical pump drive gear 40 smaller, and the positioning ring 30 is provided to share the axial force of the sun gear shaft 10 and reduce the sun gear shaft 10. Wear with spline shaft 20.

As shown in FIG. 1 , the spacer ring 30 is arranged in the spline shaft 20 , and one end of the spacer ring 30 abuts on the inner side of the mechanical pump driving gear 40 and is fixedly connected with the mechanical pump driving gear 40 . The spacer ring 30 The other end of the sun gear shaft 10 is spaced apart from the end of the sun gear shaft 10 located in the spline shaft 20. When the wear occurs between the sun gear shaft 10 and the spline shaft 20, causing the sun gear shaft 10 to move axially to the right, the spacer ring 30 The space between the sun gear shaft 10 and the sun gear shaft 10 disappears, and the sun gear shaft 10 abuts on the spacer ring 30, so that the spacer ring 30 bears the sun gear shaft 10, shares the axial force of the sun gear shaft 10, and avoids the failure of the gearbox.

Further, as shown in FIG. 2 , in order to facilitate the connection between the spacer ring 30 and the mechanical pump drive gear 40, and to facilitate the sun gear shaft 10 to abut on the spacer ring 30, the spacer ring 30 can be set to include a side of the spacer ring. The wall 31 and the bottom 32 of the spacer ring, the side wall 31 of the spacer ring is parallel to the spline shaft 20, the bottom 32 of the spacer ring is perpendicular to the spline shaft 20, and the right end of the side wall 31 of the spacer ring abuts against the drive gear 40 of the mechanical pump The inner side of the spacer is fixedly connected with the mechanical pump drive gear 40, and the bottom 32 of the spacer ring is spaced apart from the end of the sun gear shaft 10 located in the spline shaft 20.

Further, as shown in FIG. 2 , the end of the side wall 31 of the spacer ring 31 connected to the mechanical pump drive gear 40 is provided with a first bolt hole 311, and the first bolt hole 311 is arranged along the axial direction of the spacer ring 30, and the mechanical pump drives The gear 40 is provided with a second bolt hole 41 corresponding to the first bolt hole 311 , and the first bolt 50 is inserted into the second bolt hole 41 and the first bolt hole 311 to fix the spacer 30 on the mechanical pump Drive gear 40 is on.

Please continue to refer to FIG. 2. In one embodiment, the outer surface of the spacer ring 30 is spaced from the inner wall of the spline shaft 20 to provide space for the flow of lubricating oil, and the mechanical pump drive gear 40 is provided at a position corresponding to this gap. There is a first oil return hole 42 , so that the lubricating oil flowing to the gap between the spacer ring 30 and the spline shaft 20 flows out from the first oil return hole 42 .

The number of the first oil return holes 42 may be several, and they are evenly distributed in the circumferential direction of the mechanical pump driving gear 40 to improve the oil discharge effect.

Further, the spline shaft 20 is provided with a shoulder 22 , the sun gear shaft 10 is provided with a stepped surface 11 matched with the shoulder 22 , and the shoulder 22 abuts on the stepped surface 11 to axially position the sun gear shaft 10 . When the axial force of the sun gear shaft 10 wears the step surface 11 and the shoulder 22, the sun gear shaft 10 is axially displaced, the gap between the sun gear shaft 10 and the spacer ring 30 is eliminated, and the right end face of the sun gear shaft 10 is eliminated. The spacer ring 30 can be naturally fitted and positioned with the most evenly distributed load. At this time, the shoulder 22 of the spline shaft 20 and the spacer ring 30 can jointly bear the axial force transmitted by the sun gear shaft 10 without affecting each other, so that The pressure on the two positioning surfaces in contact with the sun gear shaft 10 is shared, thereby greatly reducing the rate of axial wear.

Further, please refer to FIG. 1 and FIG. 2, the shoulder 22 is located between the spline pair 21 and the spacer ring 30, and a second oil return hole 221 can be provided on the shoulder 22, and the second oil return hole 221 is along the The axial direction of the spline shaft 20 is arranged so that the lubricating oil at the front end flows out from the second oil return hole 221 .

As shown in FIG. 2 , the assembly structure further includes a tube shaft 60 . The sun gear shaft 10 is a hollow shaft. The tube shaft 60 is inserted through the shaft hole of the sun gear shaft 10 , so that the sun gear shaft 10 is sleeved outside the tube shaft 60 . The tube shaft is used for the assembly and support of some parts in the wind turbine gearbox.

Further, as shown in FIG. 2 , the inner diameter of the spacer ring 30 is larger than the outer diameter of the pipe shaft 60 , so that the spacer ring 30 can freely penetrate the pipe shaft 60 , so that the installation of the spacer ring 30 is not affected by the pipe shaft 60 . The effect is convenient for the installation of the distance ring 30.

In one embodiment, as shown in FIG. 1 , the assembly structure further includes a first gear 70 , an output shaft 80 and a mechanical pump, the first gear 70 is meshed with the mechanical pump driving gear 40 , and one end of the output shaft 80 is engaged with the first gear 70 is connected, and the other end of the output shaft 80 is connected with the mechanical pump, so that the torque of the mechanical pump driving gear 40 can be transmitted to the first gear 70, and then the first gear 70 can transmit the torque to the output shaft 80, and the output shaft 80 The torque is then transmitted to the mechanical pump to drive the mechanical pump to work.

In one embodiment, as shown in FIG. 1 , the assembly structure further includes a second bolt 90 , the mechanical pump driving gear 40 is mounted on the spline shaft 20 through the second bolt 90 , and the second bolt 90 is along the mechanical pump driving gear 40 . The axial arrangement of the mechanical pump drive gear 40 is installed on the right end of the spline shaft 20 .

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims (10)

1. an assembly structure of a wind power gearbox sun gear shaft and a spline shaft, is characterized in that, comprises: sun gear shaft (10); Spline shaft (20), the spline shaft (20) is a hollow shaft, one end of the sun gear shaft (10) penetrates into the spline shaft (20), and the sun gear shaft (10) penetrates One end of the spline shaft (20) is connected with the spline shaft (20) through a spline pair (21); a mechanical pump drive gear (40), mounted on one end of the spline shaft (20), and having an inner diameter smaller than the inner diameter of the spline shaft (20); A spacer ring (30), the spacer ring (30) is arranged in the spline shaft (20), and one end of the spacer ring (30) is in contact with the mechanical pump driving gear (40) The inner side of the spacer ring (30) is fixedly connected to the mechanical pump drive gear (40), and the other end of the spacer ring (30) is spaced from the end of the sun gear shaft (10) located in the spline shaft (20). set up. 2 . The assembly structure of a wind turbine gearbox sun gear shaft and a spline shaft according to claim 1 , wherein the spacer ring ( 30 ) comprises a spacer ring side parallel to the spline shaft ( 20 ). 3 . a wall (31), and a spacer ring bottom (32) perpendicular to the spline shaft (20); the spacer ring side wall (31) abuts on the inner side of the mechanical pump drive gear (40), and is fixedly connected with the mechanical pump drive gear (40); the spacer ring bottom (32) and the end of the sun gear shaft (10) located in the spline shaft (20) are spaced apart. 3 . The assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox according to claim 2 , wherein the side wall of the spacer ring ( 31 ) is connected to the mechanical pump drive gear ( 40 ) at one end. 4 . A first bolt hole (311) is provided, the first bolt hole (311) is arranged along the axial direction of the distance ring (30), and the mechanical pump driving gear (40) is connected to the first bolt hole (311) is correspondingly provided with a second bolt hole (41), and the first bolt (50) is inserted into the second bolt hole (41) and the first bolt hole (311), so that the fixed distance The ring (30) is fixed on the mechanical pump drive gear (40). 4. The assembly structure of a wind turbine gearbox sun gear shaft and a spline shaft according to claim 1, wherein the outer surface of the spacer ring (30) is spaced apart from the inner wall of the spline shaft (20). A first oil return hole (42) is arranged on the mechanical pump driving gear (40) corresponding to the clearance. 5 . The assembly structure of the sun gear shaft and the spline shaft of the wind turbine gearbox according to claim 1 , wherein the spline shaft ( 20 ) is provided with a shoulder ( 22 ), and the sun gear shaft ( 10 ) There is a stepped surface (11) matching with the shoulder (22), and the shoulder (22) abuts on the stepped surface (11), so that the sun gear shaft (10) is axially positioned . 6 . The assembly structure of the sun gear shaft and the spline shaft of the wind turbine gearbox according to claim 5 , wherein the shoulder ( 22 ) is located between the spline pair ( 21 ) and the spacer ring ( 30 ). 7 . ), a second oil return hole (221) is arranged on the shoulder (22), and the second oil return hole (221) is arranged along the axial direction of the spline shaft (20). 7. The assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox according to claim 1, characterized in that, further comprising a pipe shaft (60), the sun gear shaft (10) is a hollow shaft, and the pipe shaft ( 60) is passed through the shaft hole of the sun gear shaft (10). 8 . The assembly structure of the wind power gearbox sun gear shaft and the spline shaft according to claim 7 , wherein the inner diameter of the spacer ring ( 30 ) is larger than the outer diameter of the pipe shaft ( 60 ). 9 . 9 . The assembly structure of the sun gear shaft and the spline shaft of the wind power gearbox according to claim 1 , further comprising a first gear ( 70 ), an output shaft ( 80 ) and a mechanical pump, the first gear ( 70) Meshing with the mechanical pump driving gear (40), one end of the output shaft (80) is connected with the first gear (70), and the other end is connected with the mechanical pump. 10. The assembly structure of the wind power gearbox sun gear shaft and the spline shaft according to claim 1, characterized in that, further comprising a second bolt (90), the mechanical pump driving gear (40) passing through the second bolt (90) ) is mounted on the splined shaft (20).

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