Rubber sealing ring for variable pitch and yaw bearing of wind driven generator

Abstract

The utility model provides a rubber sealing ring for a variable pitch bearing and a yaw bearing of a wind driven generator, which belongs to the technical field of wind driven generators, overcomes the defect of poor dustproof effect caused by early abrasion of an inner ring or an outer ring of a bearing due to the existing rubber sealing ring, and comprises a body, the dustproof lip is characterized in that the dustproof lip is provided with a convex cambered surface capable of being in rotary contact with the inner side face of an outer ring or an inner ring of a variable pitch and yaw bearing, a concave cambered surface is further arranged in the direction where the dustproof lip is connected with the body, the concave cambered surface is smoothly connected with the convex cambered surface, lip opening surface contact can be achieved, temperature rise is slow, and the dustproof lip is not prone to falling off. Early-stage abrasion of the inner ring or the outer ring of the variable pitch and yaw bearing can be effectively prevented, and meanwhile, the dustproof effect is also improved; the concave cambered surface supplements lubricating grease for the convex cambered surface lip, so that the service life of the convex cambered surface lip is further prolonged; due to the fact that the semicircular arc arranged in the concave mode is connected with the sealing lip, the elasticity of the sealing lip is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wind driven generators, especially relates to a rubber sealing ring for wind driven generator variable pitch and yaw bearing. BACKGROUND

[0002] With people's pursuit of a better environment being higher and higher, wind power as a clean energy and renewable resource is more and more loved by people. The continuous investment of the state in the wind power industry makes the industry develop efficiently and rapidly.

[0003] The yaw variable pitch bearing plays an important role in the wind turbine, ensuring that the wind wheel and the blade have a suitable angle with the wind direction, so as to fully utilize the wind energy. The yaw variable pitch bearing is composed of an inner ring, an outer ring, a retainer, a rolling element, lubricating grease and a rubber sealing ring. The rubber sealing ring mainly plays the role of sealing the lubricating grease inside the bearing and preventing foreign matters from entering the inside of the bearing. With the continuous development of wind driven generators from small megawatts to large megawatts, the pressure maintaining capacity of the rubber sealing ring of the yaw variable pitch bearing is continuously improved, and the requirement for sealing is higher and higher.

[0004] In order to meet the surface roughness requirement and achieve the corrosion prevention requirement during the processing of the yaw variable pitch bearing, the sand blasting process and the zinc spraying process are used to process the bearing surface. Before sand blasting and zinc spraying, a set of rubber sealing ring needs to be installed to ensure that the precision inside the bearing raceway is not affected. After the sand blasting and zinc spraying process is completed, the previously installed rubber sealing ring is removed, a complete set of rubber sealing ring is reinstalled, and then the lubricating grease injection process is performed.

[0005] The rubber sealing ring of the yaw variable pitch bearing requires a service life of 20 years, but it is exposed to sunlight for a long time in the high altitude environment, which greatly affects the service life of the sealing strip. The existing rubber sealing ring is exposed to sunlight for a long time, is irradiated by ultraviolet light for a long time, and has a relatively short service life. During the sand blasting process and the zinc spraying process of the bearing processing, the rubber sealing strip is repeatedly installed, the process is complicated, and the processing cost is high.

[0006] In the Chinese patent document, a patent publication with publication number CN110848269A, named "rubber sealing ring for fan yaw variable pitch bearing", discloses a rubber sealing ring for fan yaw variable pitch bearing, comprising a sealing ring body, the upper end of the sealing ring body is provided with a trapezoidal boss, the lower end is provided with a mounting handle, the left end is provided with a forward protruding fulcrum, and the right end is provided with a dustproof lip and a sealing lip, the trapezoidal boss is used for detachable connection with the protective sealing ring, one end of the sealing ring body provided with the fulcrum is overlapped on the support table of the variable pitch bearing and the fulcrum is in contact with the inner wall of the support table, the mounting handle is inserted into the mounting groove of the variable pitch bearing, the dustproof lip is attached to the inner wall of the inner or outer ring of the variable pitch bearing, and the sealing lip is matched with the sealing groove of the variable pitch bearing and is in contact with the inner and outer rings of the variable pitch bearing to form a sealed cavity. The present application solves the problems of complicated process and sealing during bearing processing, can reduce the aging of the sealing ring, greatly prolongs the service life of the sealing ring, has good pressure maintaining capacity, and can effectively prevent lubricating grease leakage.

[0007] However, the dustproof lip of the above-mentioned rubber sealing ring has a sharp lip, and when it is in contact with the inner side surface of the inner or outer ring of the variable pitch and yaw bearing, it is a line contact with a very small contact area, so that the oil cannot be lubricated and the friction is large, which not only causes early wear of the inner or outer ring of the variable pitch and yaw bearing, but also causes poor dustproof effect. How to prevent early wear of the inner and outer rings of the bearing and improve the dustproof effect is a technical problem that needs to be solved urgently. Utility model content

[0008] The utility model aims at: providing a rubber sealing ring for variable pitch and yaw bearing of wind driven generator, to solve the above-mentioned technical problems existing in the prior art.

[0009] According to the above-mentioned purpose, the basic technical scheme of the utility model is: a rubber sealing ring for variable pitch and yaw bearing of wind driven generator, comprising a body, a dustproof lip is arranged on the body, characterized in that: a convex arc surface which can rotate in contact with the inner side surface of the outer or inner ring of the variable pitch and yaw bearing is arranged on the dustproof lip, a concave arc surface is further arranged on the direction where the dustproof lip is connected with the body, and the concave arc surface is smoothly connected with the convex arc surface.

[0010] Further, the dustproof lip is arranged on the right upper part of the body and is distributed in a right upper direction rectangular shape.

[0011] Further, the width of the dustproof lip at the convex arc surface is greater than the width of the connection between the dustproof lip and the body.

[0012] Further, the top end of the dustproof lip is in a horizontal shape, and the left and right sides thereof are connected with the edge of the dustproof lip at an obtuse angle.

[0013] Further, the right end body of the dustproof lip is further provided with a sealing lip, and the dustproof lip is connected with the sealing lip through the semicircle arranged in the recess.

[0014] Further specifically, a sealing groove is arranged on the outer ring or the inner ring of the pitch and yaw bearing, and the upper and lower lips of the sealing lip abut on the upper and lower inner surfaces of the sealing groove.

[0015] Further, the lower end body of the dustproof lip is further provided with a side sealing lip, and the side sealing lip abuts on the inner side of the inner ring or the outer ring of the pitch and yaw bearing.

[0016] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0017] 1. The convex arc surface is arranged on the dustproof lip of the utility model product, the grease surface contact can be realized, the temperature rise is slow, the early wear of the inner ring or the outer ring of the pitch and yaw bearing can be effectively prevented, and meanwhile, the dustproof effect is improved;

[0018] 2. The concave arc surface is further arranged on the direction connected with the body of the dustproof lip of the utility model product, the lubricating grease can be stored, the lubricating grease is supplemented for the convex arc surface lip, and the service life of the convex arc surface lip is further improved;

[0019] 3. The dustproof lip of the utility model product is connected with the sealing lip through the semicircle arranged in the recess, and the elasticity of the sealing lip is improved;

[0020] 4. The width of the convex arc surface of the dustproof lip of the utility model product is greater than the width of the connection between the dustproof lip and the body, the elasticity of the dustproof lip can be improved, and the contact force with the inner ring or the outer ring of the pitch and yaw bearing is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a sectional view structural schematic view of the utility model product;

[0022] Figure 2 It is a structural schematic view of the dustproof lip of the product installed on the outer ring of the bearing;

[0023] Figure 3 It is a structural schematic view of the dustproof lip of the product installed on the inner ring of the bearing;

[0024] In the drawings: 1. body; 2. dustproof lip; 3. convex arc surface; 4. concave arc surface; 5. semicircle; 6. sealing lip; 7. side sealing lip. DETAILED DESCRIPTION

[0025] Combined Figures 1 to 3 It is a structural schematic view of the principle of the embodiment of the utility model rubber sealing ring for the pitch and yaw bearing of the wind driven generator.

[0026] Embodiment 1, combinedFigure 1 、 Figure 2 The wind turbine variable pitch and yaw bearing rubber seal ring is arranged between the left inner ring and the right outer ring, comprising a body 1, a dustproof lip 2 is arranged on the body 1, the dustproof lip 2 is arranged on the right upper part of the body 1 and is distributed in a right upper direction rectangular shape strip, a convex arc surface 3 which can rotate in contact with the inner side surface of the outer ring of the variable pitch and yaw bearing is arranged on the dustproof lip 2, the width of the convex arc surface 3 of the dustproof lip 2 is greater than the width of the connecting part of the dustproof lip 2 and the body 1, the top end of the dustproof lip 2 is in a horizontal shape, the left and right sides of the dustproof lip 2 are connected to the edge of the dustproof lip 2 at an obtuse angle, a concave arc surface 4 is further arranged on the connecting direction of the dustproof lip 2 and the body 1, and the concave arc surface 4 is smoothly connected with the convex arc surface 3, a sealing lip 6 is further arranged on the right end of the body 1 of the dustproof lip 2, the dustproof lip 2 is connected with the sealing lip 6 through a semicircle arc 5 arranged in a concave manner, a sealing groove is arranged on the outer ring of the variable pitch and yaw bearing, and the upper and lower lip openings of the sealing lip 6 abut on the upper and lower inner surfaces of the sealing groove, and a side sealing lip 7 is further arranged on the lower end of the body 1 of the dustproof lip 2, and the side sealing lip 7 abuts on the inner side surface of the inner ring of the variable pitch and yaw bearing.

[0027] Embodiment 2, in combination Figure 1 、 Figure 3 The wind turbine variable pitch and yaw bearing rubber seal ring is arranged between the left inner ring and the right outer ring, comprising a body 1, a dustproof lip 2 is arranged on the body 1, the dustproof lip 2 is arranged on the right upper part of the body 1 and is distributed in a right upper direction rectangular shape strip, a convex arc surface 3 which can rotate in contact with the inner side surface of the outer ring of the variable pitch and yaw bearing is arranged on the dustproof lip 2, the width of the convex arc surface 3 of the dustproof lip 2 is greater than the width of the connecting part of the dustproof lip 2 and the body 1, the top end of the dustproof lip 2 is in a horizontal shape, the left and right sides of the dustproof lip 2 are connected to the edge of the dustproof lip 2 at an obtuse angle, a concave arc surface 4 is further arranged on the connecting direction of the dustproof lip 2 and the body 1, and the concave arc surface 4 is smoothly connected with the convex arc surface 3, a sealing lip 6 is further arranged on the right end of the body 1 of the dustproof lip 2, the dustproof lip 2 is connected with the sealing lip 6 through a semicircle arc 5 arranged in a concave manner, a sealing groove is arranged on the outer ring of the variable pitch and yaw bearing, and the upper and lower lip openings of the sealing lip 6 abut on the upper and lower inner surfaces of the sealing groove, and a side sealing lip 7 is further arranged on the lower end of the body 1 of the dustproof lip 2, and the side sealing lip 7 abuts on the inner side surface of the inner ring of the variable pitch and yaw bearing.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0029] Although the terms of 1. body; 2. dust lip; 3. convex arc; 4. concave arc; 5. semicircular arc; 6. sealing lip; 7. side sealing lip are used more in this paper, but the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

[0030] The above describes the rubber sealing ring for the variable pitch and yaw bearing of the wind turbine provided by the utility model, the introduction in which applies the specific preferred embodiments to set forth the principle and implementation mode of the utility model, these embodiments are only used to help understand the principle and core idea of the utility model, it should be pointed out that for the ordinary skilled in the art, the implementation scheme in the above embodiments can be further combined or replaced without departing from the design idea of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A rubber seal ring for a wind turbine generator pitch and yaw bearing, comprising a body (1) provided with a dust lip (2), characterized in that: The dustproof lip (2) is provided with a convex arc surface (3) which can rotate with the inner side surface of the outer ring or inner ring of the variable pitch and yaw bearing, and is further provided with a concave arc surface (4) in the direction connected with the body (1), and the concave arc surface (4) is smoothly connected with the convex arc surface (3).

2. The rubber seal ring for a pitch and yaw bearing of a wind generator according to claim 1, characterized in that: The dustproof lip (2) is located at the right upper part of the body (1) and is distributed in the right upper direction rectangular shape strip.

3. The rubber seal ring for a pitch and yaw bearing of a wind turbine generator according to claim 1, characterized in that: The width of the dustproof lip (2) at the convex arc surface (3) is greater than the width of the connection between the dustproof lip (2) and the body (1).

4. The rubber seal ring for pitch and yaw bearing of wind generator according to claim 3, characterized in that: The top end of the dustproof lip (2) is horizontally shaped, and the left and right sides thereof are connected with the edge of the dustproof lip (2) at an obtuse angle.

5. The rubber seal ring for pitch and yaw bearing of wind generator according to claim 1, characterized in that: The right end of the dustproof lip (2) is further provided with a sealing lip (6) on the body (1), and the dustproof lip (2) is connected with the sealing lip (6) through the semicircular arc (5) arranged in the concave manner.

6. The rubber seal ring for pitch and yaw bearing of wind generator according to claim 5, characterized in that: The sealing groove is arranged on the outer ring or inner ring of the variable pitch and yaw bearing, and the upper and lower lips of the sealing lip (6) are abutted on the upper and lower inner surfaces of the sealing groove.

7. The rubber seal ring for pitch and yaw bearing of wind power generator according to claim 1, characterized in that: The lower end of the dustproof lip (2) is further provided with a side sealing lip (7) on the body (1), and the side sealing lip (7) is abutted on the inner side surface of the inner ring or outer ring of the variable pitch and yaw bearing.

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