CN218718233U

CN218718233U - Self-lubricating variable pitch bearing

Info

Publication number: CN218718233U
Application number: CN202222969412.9U
Authority: CN
Inventors: 范雨晴; 梁辉; 王高峰; 胡敬源; 王东峰; 漫恒源; 李培培; 毛斐然
Original assignee: Luoyang Axis Research Technology Co ltd
Current assignee: Luoyang Axis Research Technology Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-24
Anticipated expiration: 2032-11-08

Abstract

The utility model relates to a self-lubricating becomes oar bearing, including disconnect-type outer lane and inner circle, the lateral surface of inner circle outwards protrudes and forms annular boss, and first outer lane inboard is personally submitted "L" and is appeared, second outer lane inboard personally submit down "L" and appear, first outer lane and second outer lane respectively about the boss with inner circle contact fit, on the inner circle boss, terminal surface and external diameter surface all plated one deck solid lubrication film, first outer lane and second outer lane with "L" of boss contact appears, also plated the solid lubrication film on "L" shape medial surface, self-lubricating becomes oar bearing simple structure compactness, no rolling element, self-lubricating, and axial play match grinds easily, has further reduced production and maintenance cost, has very high practical value.

Description

Self-lubricating variable pitch bearing

Technical Field

The utility model relates to a bearing technical field, concretely relates to self-lubricating becomes oar bearing.

Background

The wind driven generator is provided with three blades, and in order to obtain the maximum power generation capacity, the inclination angle of the blades needs to be adjusted through a variable pitch system according to the wind speed. With the rapid development of the wind power industry, the capacity of a single fan is continuously increased, and the requirement on the bearing capacity of a variable pitch bearing is stricter.

The multi-purpose double-row four-point contact ball bearing of the existing wind driven generator pitch bearing has the advantages that the steel ball is positioned in the arc channel between the inner ring and the outer ring of the bearing and is used as a rolling body, the defects of insufficient rigidity and small bearing capacity can be caused during working, and the service life of the pitch bearing is shortened. In the prior patent CN202022872132.7, a three-row cylindrical roller variable pitch bearing for independently changing the pitch of a wind generating set provides a three-row roller variable pitch bearing, so that the bearing capacity of the bearing is improved; however, the bearing has the disadvantages of complex structure, high processing difficulty, high production cost, lubricant requirement during operation and high maintenance cost.

SUMMERY OF THE UTILITY MODEL

To prior art's defect, the utility model provides a self-lubricating becomes oar bearing, the structure is simplified, can the self-lubricating, and production and maintenance cost are low.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a self-lubricating variable pitch bearing comprises an outer ring and an inner ring, wherein the outer ring is axially separated into a first outer ring and a second outer ring, the outer side surface of the inner ring protrudes outwards to form an annular boss, the inner side of the first outer ring corresponds to the inner ring, the inner side of the first outer ring is L-shaped, the inner side of the second outer ring is inverted L-shaped, and the first outer ring and the second outer ring are axially attached and connected to form an annular groove matched with the annular boss; the first outer ring and the second outer ring are respectively in contact fit with the inner ring from top to bottom on the lug boss, a layer of solid lubricating film is plated on the upper end surface, the lower end surface and the outer diameter surface of the lug boss of the inner ring, and the solid lubricating films are also plated on the L-shaped and inverted L-shaped inner side surfaces of the first outer ring and the second outer ring in contact with the lug boss.

Furthermore, a plurality of uniformly distributed installation through holes are formed in the axial end faces of the two outer rings and the axial end faces of the two inner rings and are used for connecting the wind driven generator; wherein, the outer lane is connected with fan wheel hub, and the inner circle is connected with the blade.

Furthermore, a plurality of connecting threaded holes are uniformly formed in the axial end faces of the two outer rings and used for combining the first outer ring and the second outer ring into a whole.

Further, the solid lubricating film is arranged on the contact surfaces among the first outer ring, the second outer ring and the inner ring in an ion plating mode.

Furthermore, the first outer ring and the second inner ring are tightly connected along the binding surface, H is the distance between two radial raceways of the first outer ring and the second outer ring, hw is the average height value of the boss of the inner ring, ga is the fitting clearance of a given bearing, the grinding amount of the upper end surface of the boss of the inner ring is H-Hw-Ga, and the final grinding height of the boss of the inner ring is Hw + Ga.

Furthermore, sealing rings are arranged on the upper end face and the lower end face of the inner ring matched with the first outer ring and the second outer ring.

Has the advantages that: the utility model discloses a self-lubricating becomes oar bearing simple structure, no rolling element adopts the ion plating mode to plate the lubricant film, can the self-lubricating, does not need emollient pollution-free, has reduced production and maintenance cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an axial play detection schematic diagram of the present invention.

Reference numerals: 1. a first outer race; 2. a second outer race; 3. an inner ring; 4. a first seal ring; 5. a second seal ring; 6. and (4) a boss.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the self-lubricating variable pitch bearing comprises an outer ring and an inner ring, wherein the outer ring is a separated outer ring and is separated into a first outer ring 1 and a second outer ring 2 along the axial direction, the outer side surface of the inner ring 3 protrudes outwards to form an annular boss 6, the inner side of the first outer ring 1 is in an L shape, the inner side of the second outer ring 2 is in an inverted L shape, and the first outer ring 1 and the second outer ring 2 are attached along the axial direction to form an annular groove matched with the boss 5; the first outer ring 1 and the second outer ring 2 are respectively contacted and matched with the inner ring 3 at the upper part and the lower part of the lug boss 6, the upper end surface, the lower end surface and the outer diameter surface (namely three roller paths) of the lug boss 6 of the inner ring are plated with a layer of solid lubricating film in an ion plating way, and solid lubricating films are plated on the L-shaped inner side faces and the inverted L-shaped inner side faces of the first outer ring 1 and the second outer ring 2, which are in contact with the lug boss 6, in an ion plating mode, and the solid lubricating films are arranged on the contact surfaces of the first outer ring 1, the second outer ring 2 and the inner ring 3, so that the inner ring 3 can rotate in a self-lubricating mode when the outer rings are fixed.

The lubricating film is plated in an ion plating mode, so that the adhesive force is strong, the plating layer is thin and uniform, the dimensional precision and tolerance fit of parts are not influenced, the cost can be saved, and a large area can be plated by a small amount of lubricating material; the lubricating film has good quality, small friction coefficient and long service life.

The upper end surface and the lower end surface of the inner ring 3 matched with the first outer ring 1 and the second outer ring 2 are respectively provided with a first sealing ring 4 and a second sealing ring 5.

And a plurality of mounting through holes are uniformly distributed on the axial end faces of the two outer rings and the inner ring 3 and used for connecting the bearing with a wind driven generator, wherein the outer rings are connected with a fan hub, and the inner rings are connected with blades.

A plurality of connecting threaded holes are uniformly distributed between the mounting through holes on the axial end faces of the first outer ring 1 and the second outer ring 2 and used for connecting and fixing the first outer ring and the second outer ring together, so that the bearing is convenient to mount and transport, and the number of the connecting threaded holes is determined according to the size of the bearing; in addition, the outer end faces of the two outer rings and the lower end face of the inner ring are respectively provided with a hoisting threaded hole for hoisting the bearing.

When the sealing device is assembled, the first outer ring 1 is placed firstly, then the inner ring 3 is placed, finally the second outer ring 2 is placed, the first outer ring 1 and the second outer ring 2 are fixedly connected through a plurality of screws, and finally the first sealing ring 4 and the second sealing ring 5 are installed.

Because the contact surfaces of the first outer ring 1, the second outer ring 2 and the inner ring 3 are all provided with solid lubricating films, the inner ring 3 can rotate in a self-lubricating mode when the first outer ring 1 and the second outer ring 2 are fixed.

With reference to fig. 2, a first outer ring 1 and a second inner ring 2 are tightly connected along a binding surface, a distance H between two radial raceways of the first outer ring 1 and the second outer ring 2 is measured, wherein H is an average value of at least three positions measured uniformly on the circumference of two planes, and a height Hw of a tongue (i.e., a boss 6) of the inner ring 3 is measured, and Hw is an average value of the height of the boss 6 of the inner ring 3; the fitting clearance of the bearing is given as Ga, the upper end face of the boss 6 is ground, the grinding amount is (H-Hw-Ga), and the final grinding height of the inner ring boss 6 is (Hw + Ga).

Self-lubricating becomes oar bearing simple structure is compact, does not have the rolling element, the self-lubricating, just the utility model discloses a structure for the axial play match grinding method of this bearing is simple, accurate, has further reduced production and maintenance cost, has very high practical value.

While the invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but rather, may be embodied in many different forms without departing from the spirit and scope of the invention, when the technical content disclosed above can be utilized to make some changes or modifications to equivalent embodiments, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention all still belong to the scope of the technical solution of the present invention.

Claims

1. A self-lubricating variable pitch bearing comprises an outer ring and an inner ring, and is characterized in that the outer ring is axially separated into a first outer ring and a second outer ring, the outer side surface of the inner ring protrudes outwards to form an annular boss, the inner side surface of the first outer ring corresponds to the inner ring, the inner side surface of the first outer ring is L-shaped, the inner side surface of the second outer ring is inverted L-shaped, and the first outer ring and the second outer ring are axially attached and connected to form an annular groove matched with the annular boss; the first outer ring and the second outer ring are respectively in contact fit with the inner ring from top to bottom on the lug boss, a layer of solid lubricating film is plated on the upper end surface, the lower end surface and the outer diameter surface of the lug boss of the inner ring, and the solid lubricating films are also plated on the L-shaped and inverted L-shaped inner side surfaces of the first outer ring and the second outer ring in contact with the lug boss.

2. The self-lubricating pitch bearing of claim 1, wherein a plurality of uniformly distributed mounting through holes are formed in the axial end faces of the two outer rings and the inner ring for connecting a wind driven generator; wherein, the outer lane is connected with fan wheel hub, and the inner circle is connected with the blade.

3. The self-lubricating pitch bearing of claim 1, wherein a plurality of connecting threaded holes are uniformly formed in the axial end faces of the two outer rings for combining the first outer ring and the second outer ring into a whole.

4. The self-lubricating pitch bearing of claim 1, wherein the solid lubricating film is disposed on the contact surfaces between the first outer ring, the second outer ring and the inner ring by ion plating.

5. The self-lubricating pitch bearing of claim 1, wherein the first outer ring and the second inner ring are tightly connected along the abutting surface, H is the distance between the radial raceways of the first outer ring and the second outer ring, hw is the average height value of the bosses of the inner ring, and Ga is the fit clearance of a given bearing, so that the grinding amount of the upper end surface of the boss of the inner ring is H-Hw-Ga, and the final grinding height of the boss of the inner ring is Hw + Ga.

6. The self-lubricating pitch bearing of claim 1, wherein seal rings are provided at upper and lower end faces of the inner ring that engage with the first and second outer rings.