CN216589886U

CN216589886U - Yaw gear box single armed planet subassembly

Info

Publication number: CN216589886U
Application number: CN202123435411.8U
Authority: CN
Inventors: 李想; 陈可; 张晓凯; 邓创; 袁俊松
Original assignee: Chongqing Gearbox Co Ltd
Current assignee: Chongqing Gearbox Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-24
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a yaw gearbox single-arm planet assembly, which comprises a planet carrier, a planet shaft, a planet wheel and a sun wheel, wherein the planet carrier is used for being connected with an output gear shaft or the sun wheel of the next stage, the planet shaft and the planet carrier are of an integrated structure, and the planet wheel is arranged on the planet shaft through a bearing sleeve without an outer ring; the planet shaft is provided with a positioning step used for being abutted against the lower end face of the outer-ring-free bearing, the upper end face of the planet shaft is provided with a bending groove containing at least one bending bayonet, the bottom surface of the bending groove is lower than the upper end face of the planet wheel, and the outer wall face of the bending groove is bent outwards so as to axially position the upper end face of the outer-ring-free bearing. The planet shaft and the planet carrier are integrally designed, so that the coaxiality assembly error of the planet shaft and the planet carrier is avoided, and the operation safety is improved; the non-outer-ring bearing is axially positioned through the bending groove, parts such as a gasket and a clamp spring do not need to be arranged, the structure is simple, the assembly is convenient, the overall safety of the unit is improved, and the operation and maintenance cost is reduced.

Description

Yaw gear box single armed planet subassembly

Technical Field

The utility model relates to a driftage gear box technical field, more specifically say, relate to a driftage gear box single armed planet subassembly.

Background

The yaw gear box is used as a speed reducer, is an important component of the wind generating set and mainly comprises an input end, a multi-stage planetary gear structure and an output end.

Referring to fig. 1 and 2, in a conventional single-arm planetary assembly, a planetary shaft 2 is installed in a planetary carrier 1, a planetary wheel 3 is sleeved on the planetary shaft 2, the planetary wheel 3 is engaged with a sun wheel 5 of the current stage, and the planetary carrier 1 is connected with the sun wheel 5 of the next stage in a key manner. During assembly, the planet shaft 2 is arranged in the mounting hole of the planet carrier 1, the upper gasket, the bearing 03, the planet wheel 3 and the lower gasket are sequentially arranged, and finally the planet shaft 2 is axially positioned through the upper snap spring and the lower snap spring.

However, the prior single-arm planetary assembly has the following disadvantages:

firstly, a planet shaft 2 is arranged in an installation hole of a planet carrier 1, and the coaxiality error of the installation hole can cause the planet wheel 3 to generate unbalance loading in the working process, further cause abnormal sound and poor meshing and influence the quality of a yaw gearbox;

secondly, the planet wheel 3 is axially positioned through the clamp spring 02, the upper clamp spring can expose the end face of the upper gasket, the internal space of the box body is increased, and the yawing gearbox is loose in structure;

thirdly, the planet carrier 1 is heated and then is pressed on the planet shaft 2, the lower clamp spring is assembled after the planet carrier 1 is cooled, then the lower washer, the bearing 03, the planet wheel 3, the upper washer and other parts are assembled in sequence and positioned by the upper clamp spring, so that more related parts are needed, the assembly process is complex, and the assembly cost is increased;

in the assembling process, the upper clamp spring and the lower clamp spring are not assembled or are not assembled in place, so that parts on the planet shaft 2 axially move, or the upper clamp spring and the lower clamp spring pop out and fall into other transmission parts, the yaw gear box is unsmooth in operation, even the operation of the whole wind turbine generator is damaged, and the maintenance cost is increased.

In summary, how to provide a single-arm planetary assembly with simple structure, convenient assembly and high safety is an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a driftage gear box single armed planet subassembly, planet axle and planet carrier structure as an organic whole carry out axial positioning to no outer lane bearing through the bending groove, need not parts such as packing ring, jump ring, simple structure, the assembly of being convenient for, and improved the security of unit operation.

In order to achieve the above object, the present invention provides the following technical solutions:

a single-arm planet assembly of a yaw gearbox comprises a planet carrier, a planet shaft, a planet wheel and a sun wheel, wherein the planet carrier is used for being connected with an output gear shaft or the sun wheel of the next stage, the planet shaft and the planet carrier are of an integrated structure, and the planet wheel is sleeved on the planet shaft through a bearing without an outer ring;

the planet shaft is provided with a positioning step used for being abutted to the lower end face of the outer-ring-free bearing, the upper end face of the planet shaft is provided with a bending groove containing at least one bending bayonet, the bottom surface of the bending groove is lower than the upper end face of the planet wheel, and the outer wall face of the bending groove is outwards bent so as to carry out axial positioning on the upper end face of the outer-ring-free bearing.

Preferably, the cross section of the bending groove is trapezoidal.

Preferably, the bent bayonets are uniformly distributed in the circumferential direction of the planet shaft.

Preferably, the upper end face of the planet carrier is provided with a supporting plate, and the supporting plate is in interference fit with the planet carrier.

Preferably, the support plate is a flat plate.

When the yaw gearbox single-arm planetary assembly is assembled, the outer-ring-free bearing and the planetary gear sleeve are arranged on the planetary shaft, so that the lower end face of the outer-ring-free bearing is abutted against the positioning step face of the planetary shaft, and the axial position of the lower end face of the outer-ring-free bearing is fixed; knocking the outer wall surface of the bending groove by using a tool, uniformly bending the outer wall surface of the bending groove outwards, and axially positioning the upper end surface of the bearing without the outer ring; the lower end of the planet carrier is connected with an output gear shaft or a next-stage sun gear.

The utility model provides a yaw gear box single armed planet subassembly sets up planet axle and planet carrier as an organic whole structure, has avoided the planet axle that the assembly leads to and the axiality error of planet carrier, has avoided the planet wheel unbalance loading, has improved the security of single armed planet subassembly; the non-outer-ring bearing is axially positioned through the bending groove, parts such as a gasket and a clamp spring do not need to be arranged, the structure is simple, the assembly is convenient, the overall safety of the unit is improved, and the operation and maintenance cost is reduced.

In addition, parts such as a gasket and a clamp spring are eliminated, and the axial size of the single-arm planetary assembly is reduced, so that the structure in the yaw gearbox is more compact, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art single arm planetary assembly;

FIG. 2 is an enlarged view of a portion of the area B in FIG. 1;

FIG. 3 is a schematic structural view of an embodiment of a single-arm planetary assembly of a yaw gearbox provided by the present invention;

FIG. 4 is a top view of the gear shaft of FIG. 3;

fig. 5 is a partially enlarged view of the area a in fig. 3.

In fig. 1-5:

the device comprises a gasket 01, a clamp spring 02, a bearing 03, a planet carrier 1, a planet shaft 2, a bending groove 21, a bending bayonet 22, a planet wheel 3, a non-outer-ring bearing 4, a sun wheel 5 and a supporting plate 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a driftage gear box single armed planet subassembly, planet axle and planet carrier structure as an organic whole carry out axial positioning to no outer lane bearing through the bending groove, need not parts such as packing ring, jump ring, simple structure, the assembly of being convenient for, and improved the security of unit operation.

Referring to fig. 1-5, fig. 1 is a schematic structural diagram of a single-arm planetary assembly in the prior art; FIG. 2 is an enlarged view of a portion of the area B in FIG. 1; FIG. 3 is a schematic structural view of an embodiment of a single-arm planetary assembly of a yaw gearbox provided by the present invention; FIG. 4 is a top view of the gear shaft of FIG. 3; fig. 5 is a partially enlarged view of the area a in fig. 3.

The utility model provides a yaw gear box single armed planet subassembly, including planet carrier 1, planet axle 2, planet wheel 3 and sun gear 5, planet carrier 1 is used for being connected with output gear shaft or next grade sun gear 5, planet axle 2 and planet carrier 1 structure as an organic whole, planet wheel 3 is located on planet axle 2 through no outer lane bearing 4 cover; the planet shaft 2 is provided with a positioning step used for being abutted against the lower end face of the outer-ring-free bearing 4, the upper end face of the planet shaft 2 is provided with a bending groove 21 containing at least one bending bayonet 22, the bottom face of the bending groove 21 is lower than the upper end face of the planet wheel 3, and the outer wall face of the bending groove 21 is bent outwards so as to axially position the upper end face of the outer-ring-free bearing 4.

Referring to fig. 3, a planet wheel 3 of the single-arm planetary assembly is sleeved on a planet shaft 2, the planet wheel 3 is meshed with a sun wheel 5 of the current stage, and the planet carrier 1 is in key connection with an output gear shaft or a sun wheel 5 of the next stage to transmit torque and load and drive the output gear shaft or the sun wheel 5 of the next stage to rotate along with the planet wheel 3.

The planet shaft 2 and the planet carrier 1 are integrated, please refer to fig. 3, the planet shaft 2 is connected to the upper end surface of the planet carrier 1, and the strength of the axis of the planet shaft 2 from the center of the axis of the mounting hole of the planet carrier 1, the height of the planet shaft 2, and the like is checked, calculated and determined according to the actual production requirements, which is not described herein again.

The planet shaft 2 and the planet carrier 1 are integrally arranged, so that the gasket 01 arranged on the upper surface and the gasket 01 arranged on the lower surface of the planet wheel 3 and a lower snap spring used for axially positioning the lower end surface of the planet shaft 2 in the existing single-arm planet component can be omitted.

The upper end face of the planet shaft 2 is provided with a bending groove 21 as shown in fig. 3 and 5, and the bottom surface of the bending groove 21 is lower than the upper end face of the planet wheel 3, so that the outer wall surface of the bending groove 21 can be bent to enable the outer wall surface of the bending groove 21 to be abutted against the upper end face of the planet wheel 3, and further the axial positioning of the planet wheel 3 is realized.

The bending groove 21 may be a rectangular groove or a trapezoidal groove. Preferably, in consideration of the ease of the bending operation, the cross section of the bending groove 21 may be formed in a trapezoidal shape, and the thickness of the outer wall surface of the trapezoidal groove from bottom to top is gradually reduced, so that the bending by knocking is easier.

In order to facilitate the bending of the bending groove 21, at least one bending bayonet 22 is arranged on the bending groove 21, and the bending bayonet 22 does not need to be bent outwards, so that the bending grooves 21 on two sides of the bending bayonet 22 are better bent outwards. Preferably, the bent bayonets 22 may be arranged to be evenly distributed in the circumferential direction of the planet shaft 2.

The shape and size of the bending groove 21 and the number and size of the bending bayonets 22 need to be determined according to the size and design strength requirements of the planet shaft 2 in actual production, so as to prevent the bending groove 21 from being too wide and too deep to affect the strength of the planet shaft 2, or prevent the bending groove 21 from being too shallow and too narrow to be bent easily.

During assembly, the outer-ring-free bearing 4 and the planet wheel 3 are sleeved on the planet shaft 2, so that the lower end face of the outer-ring-free bearing 4 is abutted against the positioning step face of the planet shaft 2, and the axial position of the lower end face of the outer-ring-free bearing 4 is fixed; knocking the outer wall surface of the bending groove 21 by using a tool, uniformly bending the outer wall surface of the bending groove 21 outwards, and axially positioning the upper end surface of the outer ring-free bearing 4; the lower end of the planet carrier 1 is connected with an output gear shaft or a sun gear 5 of the next stage.

In the embodiment, the planet shaft 2 and the planet carrier 1 are of an integrated structure, so that the coaxiality error of the planet shaft 2 and the planet carrier 1 caused by assembly is avoided, the eccentric load of the planet wheel 3 is avoided, and the safety of a single-arm planet assembly is improved; the non-outer-ring bearing 4 is axially positioned through the bending groove 21, parts such as a gasket 01 and a clamp spring 02 do not need to be arranged, the structure is simple, the assembly is convenient, the overall safety of the unit is improved, and the operation and maintenance cost is reduced.

In addition, parts such as a gasket 01 and a clamp spring 02 are eliminated, and the axial size of the single-arm planetary assembly is reduced, so that the structure in the yaw gearbox is more compact, and the cost is reduced.

On the basis of the above embodiments, please refer to fig. 3, a supporting plate 6 is disposed on the upper end surface of the planet carrier 1, and the supporting plate 6 is in interference fit with the planet carrier 1. Through interference fit, a clamp spring 02 for limiting the axial position of the supporting plate 6 is omitted, on one hand, the structure of the single-arm planetary assembly is simplified, the accessory cost is saved, on the other hand, the assembly flow of the single-arm planetary assembly is simplified, and the assembly efficiency is improved.

Preferably, referring to fig. 3, the support plate 6 may be a flat plate, which reduces the axial height of the planet carrier 1 compared to the prior art, such that the internal structure of the yaw gearbox is more compact.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a yaw gear box single armed planet subassembly introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A single-arm planet assembly of a yaw gearbox comprises a planet carrier (1), a planet shaft (2), a planet wheel (3) and a sun wheel (5), wherein the planet carrier (1) is used for being connected with an output gear shaft or the sun wheel (5) of the next stage, and is characterized in that the planet shaft (2) and the planet carrier (1) are of an integrated structure, and the planet wheel (3) is sleeved on the planet shaft (2) through a bearing (4) without an outer ring;

the planet axle (2) be equipped with be used for with the location step of the lower terminal surface butt of no outer lane bearing (4), the up end of planet axle (2) is equipped with bending groove (21) that contain at least one bayonet socket (22) of buckling, the bottom surface in bending groove (21) is less than the up end of planet wheel (3), the outer wall in bending groove (21) is towards outer bending, so that it is right the up end of no outer lane bearing (4) carries out axial positioning.

2. A yaw gearbox single arm planetary assembly according to claim 1, characterized in that the cross section of the bending groove (21) is trapezoidal.

3. A yaw gearbox single arm planetary assembly according to claim 1, characterized in that said bent bayonets (22) are evenly distributed in the circumferential direction of the planetary shaft (2).

4. A yaw gearbox single arm planetary assembly according to any of claims 1-3, characterized in that the upper end face of the planet carrier (1) is provided with a support plate (6), and the support plate (6) is in interference fit with the planet carrier (1).

5. A yaw gearbox single arm planetary assembly according to claim 4, characterized in that the support plate (6) is a flat plate.