阅读说明：本技术 滑动主轴承传动链及包括其的双馈风力涡轮机 (Sliding main bearing drive chain and double-fed wind turbine comprising same ) 是由 曹李兴 杨飞 缪骏 刘定 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种滑动主轴承传动链及包括其的双馈风力涡轮机,滑动主轴承传动链包括：一轴承内圈和一主轴承外圈,轴承内圈具有径向向外突出的轴肩以及沿着轴向延伸的内圈本体,主轴承外圈具有设置于轴肩的轴向两侧的轴向端板以及沿着轴向延伸的轴向延伸部；两组轴向滑块；至少一组径向滑块,径向滑块通过端面压板在轴向限位,且径向滑块在内圈本体和轴向延伸部之间提供静动摩擦隔离和载荷传递。本发明相比滚动主轴承有更大的承载能力,抗震性好,工作平稳可靠,提高了风机的可靠性。容易制造,缩短了生产周期,降低了生产成本低。端面压板可拆卸,轴向滑块和径向滑动可更换,轴承使用寿命长。(The invention discloses a sliding main bearing transmission chain and a double-fed wind turbine comprising the same, wherein the sliding main bearing transmission chain comprises: the bearing comprises a bearing inner ring and a main bearing outer ring, wherein the bearing inner ring is provided with a shaft shoulder protruding outwards in the radial direction and an inner ring body extending along the axial direction, and the main bearing outer ring is provided with axial end plates arranged on two axial sides of the shaft shoulder and an axial extending part extending along the axial direction; two sets of axial sliding blocks; the radial sliding blocks are axially limited through the end face pressing plate, and static and dynamic friction isolation and load transfer are provided between the inner ring body and the axial extension parts. Compared with a rolling main bearing, the rolling main bearing has higher bearing capacity, good shock resistance and stable and reliable work, and improves the reliability of the fan. Easy manufacture, shortened production cycle, reduced production cost. The end surface pressing plate is detachable, the axial sliding block and the radial sliding block can be replaced, and the service life of the bearing is long.)

1. A sliding main bearing drive chain, comprising:

The bearing comprises a bearing inner ring and a main bearing outer ring, wherein the bearing inner ring is provided with a shaft shoulder protruding outwards in the radial direction and an inner ring body extending along the axial direction, and the main bearing outer ring is provided with axial end plates arranged on two axial sides of the shaft shoulder and an axial extension part extending along the axial direction;

The two sets of axial sliding blocks are respectively accommodated in the axial end plates at two sides, the two sets of axial sliding blocks are respectively limited at two sides of the shaft shoulder through end surface pressing plates, and the axial sliding blocks provide static and dynamic friction isolation and load transfer between the shaft shoulder and the end surface pressing plates;

The radial sliding blocks are limited in the axial direction through end face pressing plates, and static and dynamic friction isolation and load transmission are provided between the inner ring body and the axial extension parts through the radial sliding blocks.

2. A sliding main bearing drive chain according to claim 1 wherein each set of axial slides comprises a plurality of axial slides; and each axial sliding block is circumferentially distributed between the shaft shoulder and the end surface pressing plates on two sides.

3. A sliding main bearing drive chain according to claim 1 wherein each set of radial sliders comprises a plurality of radial sliders; and each radial sliding block is distributed between the inner ring body and the axial extension part in a surrounding way.

4. A sliding main bearing drive chain according to claim 1 wherein the number of end pressure plates located on the same side of the axial end plate or the axial extension around which the end pressure plates extend is one.

5. A sliding main bearing drive chain according to claim 1 wherein there are a plurality of end plates located on the same side of the axial end plate or the axial extension, each end plate on the same side being circumferentially arranged.

6. A sliding main bearing drive chain according to claim 1 wherein the end clamp is removably attached to the axial end plate or the shoulder; and the end surface pressing plate is detachably connected to the inner ring body or the axial extension part.

7. A sliding main bearing drive chain according to claim 1 wherein the axial slider blocks and the radial slider blocks are circumferentially spaced apart.

8. The sliding main bearing drive chain of claim 7 wherein said axial end plate has a plurality of spaced apart retaining recesses formed therein, said retaining recesses being circumferentially arranged, wherein each of said axial slides corresponds one-to-one with each of said retaining recesses and is received therein; the end face pressing plate covers each limiting groove.

9. The sliding main bearing drive chain of claim 7 wherein said axially extending portion or said inner ring body is formed with radially projecting retaining bosses on a peripheral side thereof, each of said radial slide blocks being circumferentially retained between adjacent ones of said retaining bosses.

10. A sliding main bearing drive chain according to claim 1 wherein the radial outer side of the shoulder is provided with a radial end plate, said radial end plate being integral with the axial end plates on both sides.

11. A sliding main bearing drive chain according to any of claims 1-10 wherein the number of said axial extensions is one or more, said axial extensions being separate from and/or connected to said axial end plates.

12. A sliding main bearing drive chain according to claim 11 wherein the end pressure plates are provided on both axial sides of the axial extension that is separate from the axial end plates; the end face pressing plate is arranged on one side, axially outwards, of the axial extension part connected with the axial end plate.

13. The sliding main bearing drive chain of claim 11, wherein the bearing inner race is coupled to a hub of a doubly-fed wind turbine and the bearing outer race is coupled to a main base of the doubly-fed wind turbine.

14. A sliding main bearing drive train according to claim 13 wherein the bearing inner race is coupled to the generator rotor by a coupling.

15. A doubly-fed wind turbine comprising a sliding main bearing drive train as claimed in any of claims 1 to 14.

Technical Field

The invention relates to a sliding main bearing drive chain and a double-fed wind turbine comprising the same.

Background

The existing double-fed wind turbine transmission chain rolling main bearing has the problems of low bearing capacity, poor shock resistance, unstable and reliable work, difficulty in manufacturing, long production period, high production cost, incapability of maintaining and short service life of the bearing.

There are also techniques using sliding bearings, but the general maintainability is not high. The sliding bearing has the defects of high heat productivity and quick abrasion compared with a rolling bearing. It is therefore highly desirable to design a new sliding main bearing drive chain structure to solve this problem.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, a rolling main bearing of a double-fed wind turbine is low in bearing capacity, poor in shock resistance, unstable and reliable in work, difficult to manufacture, long in production period, high in production cost, incapable of maintaining and short in service life of a bearing, and provides a sliding main bearing transmission chain and the double-fed wind turbine comprising the same.

The invention solves the technical problems through the following technical scheme:

A sliding main bearing drive chain, comprising:

The bearing comprises a bearing inner ring and a main bearing outer ring, wherein the bearing inner ring is provided with a shaft shoulder protruding outwards in the radial direction and an inner ring body extending along the axial direction, and the main bearing outer ring is provided with axial end plates arranged on two axial sides of the shaft shoulder and an axial extension part extending along the axial direction;

The two sets of axial sliding blocks are respectively accommodated in the axial end plates at two sides, the two sets of axial sliding blocks are respectively limited at two sides of the shaft shoulder through end surface pressing plates, and the axial sliding blocks provide static and dynamic friction isolation and load transfer between the shaft shoulder and the end surface pressing plates;

The radial sliding blocks are limited in the axial direction through end face pressing plates, and static and dynamic friction isolation and load transmission are provided between the inner ring body and the axial extension parts through the radial sliding blocks.

The axial sliding block and the radial sliding block can be friction plates, are usually of sheet structures and can be made of different materials.

The relative rolling main bearing of the scheme has the advantages that: 1. the sliding main bearing has high bearing capacity; (the reason why the contact area is large); 2. the structure is simple, and the manufacture, the processing and the disassembly are convenient; 3. good impact resistance and good vibration absorption performance, stable operation and high rotation precision.

The solution is also economical with respect to rolling main bearings. At present, the main bearing of the fan is in a rolling main bearing mode. The rolling bearing has small internal clearance, the processing precision requirement of each part is higher, and the bearing steel is processed by heat treatment. The rolling main bearing is expensive. The sliding main bearing has simple structure and simple manufacture and processing. Compared with a rolling main bearing transmission chain, the sliding main bearing has the advantage that the cost is reduced by at least 60%.

In addition, two sets of axial sliders and at least one set of radial slider of this scheme have formed the multiple spot and have supported. Not only the bending strength of the inner ring body is enhanced, but also the strength of the shaft shoulder is enhanced.

preferably, each set of axial slides comprises a plurality of axial slides; and each axial sliding block is circumferentially distributed between the shaft shoulder and the end surface pressing plates on two sides.

Preferably, each set of radial sliders comprises a plurality of radial sliders; and each radial sliding block is distributed between the inner ring body and the axial extension part in a surrounding way.

Preferably, the number of the end surface pressing plates located on the same side of the axial end plate or the axial extension part is one, and the end surface pressing plates extend in a surrounding mode. At this time, the end surface pressing plate is further annular.

Preferably, the number of the end surface pressing plates located on the same side of the axial end plate or the axial extension part is multiple, and the end surface pressing plates on the same side are arranged in a surrounding manner. The adoption of a plurality of end surface pressing plates can facilitate replacement. In the long-term operation of equipment, in case there is the terminal surface clamp plate to produce the damage, only need to replace corresponding terminal surface clamp plate can, need not replace other terminal surface clamp plates.

Preferably, the end surface pressing plate is detachably connected to the axial end plate or the shaft shoulder; and the end surface pressing plate is detachably connected to the inner ring body or the axial extension part. The end surface pressing plate is detachably arranged, so that the axial sliding block and the radial sliding block can be replaced at any time.

preferably, the end face pressure plate is fixed by a threaded fastener.

Preferably, the axial sliding blocks and the radial sliding blocks are limited to be arranged at intervals in the circumferential direction.

Preferably, a plurality of spacing grooves are formed in the axial end plate at intervals, the spacing grooves are arranged in a surrounding manner, each axial sliding block corresponds to each spacing groove one by one, and the axial sliding blocks are accommodated in the spacing grooves. The limiting groove can limit and guide the axial sliding block.

Preferably, the end surface pressing plate covers each limiting groove.

Preferably, a plurality of radially protruding limiting bosses are formed on the circumferential side of the axial extension portion or the inner ring body, and each radial sliding block is limited between adjacent limiting bosses in the circumferential direction. The limiting boss can limit and guide the radial sliding block.

Preferably, a radial end plate is arranged on the radial outer side of the shaft shoulder, and the radial end plate and the axial end plates on the two sides are integrally arranged. Therefore, the radial end plate and the axial end plate have the advantage of integration, and can provide better strength and bear larger load.

Preferably, the number of the axial extension parts is one or more, and the axial extension parts are separated from and/or connected with the axial end plate. When the axial extending portion is provided in plural, the bending strength of the inner ring body can be greatly enhanced by the distribution in the axial direction of the inner ring body. The connection of the axial extension to the end plate may make the structure more compact.

Preferably, the end surface pressing plates are arranged on two axial sides of the axial extension part separated from the axial end plate; the end face pressing plate is arranged on one side, axially outwards, of the axial extension part connected with the axial end plate. The axial inward side of the axial extension part connected with the axial end plate is limited by the axial end plate, so that only the axial outward side is provided with an end surface pressing plate.

Preferably, the bearing inner ring is connected with a hub of the doubly-fed wind turbine, and the bearing outer ring is connected with a main base of the doubly-fed wind turbine.

Preferably, the bearing inner ring is connected with the generator rotor through a coupler.

A doubly-fed wind turbine comprising said sliding main bearing drive train.

The positive progress effects of the invention are as follows: compared with a rolling main bearing, the rolling main bearing has higher bearing capacity, good shock resistance and stable and reliable work, and improves the reliability of the fan. Easy manufacture, shortened production cycle, reduced production cost. The end surface pressing plate is detachable, the axial sliding block and the radial sliding block can be replaced, and the service life of the bearing is long.

Drawings

Fig. 1 is a schematic structural view of a sliding main bearing drive chain according to embodiment 1 of the present invention.

fig. 2 is a partially enlarged schematic view of a sliding main bearing drive chain according to embodiment 1 of the present invention.

Fig. 3 is a schematic view showing the end-face pressure plate of the sliding main bearing drive chain according to embodiment 1 of the present invention removed.

Fig. 4 is a schematic structural view of a sliding main bearing drive chain according to embodiment 2 of the present invention.

Fig. 5 is a partially enlarged schematic view of a sliding main bearing drive chain according to embodiment 2 of the present invention.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.