Multi-lip sealing ring for variable pitch and yaw bearing of wind driven generator

Abstract

The utility model provides a multi-lip 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 sealing effect of the existing rubber sealing ring, and comprises a plurality of lips including an upper sealing lip, a lower sealing lip, a lower sealing lip II and a lower sealing lip III, the section cutting plane of the upper sealing lip is triangular, and the section cutting plane of the lower sealing lip is triangular. The included angle of two edges of the lower sealing lip is an acute angle, the second lower sealing lip is in a long strip shape, one side of the second lower sealing lip and the upper sealing lip share the same edge, a right angle and an obtuse angle are formed at the lip opening portion of the second lower sealing lip, the third lower sealing lip is in a short strip shape, and the third lower sealing lip is smoothly connected with the lower sealing lip and the second lower sealing lip through the left lower portion and the right upper portion of an acute-angle-type inward-concave arc respectively. According to the utility model, the plurality of lips can divide grease into a plurality of chambers for storage, so that the different lips are respectively lubricated, and the sealing effect is good; the inner concave cambered surface at the lower part of the dustproof lip fully lubricates the dustproof lip, and the inner concave semicircle between the dustproof lip and the sealing lip provides a sufficient elastic space for the lip so as not to be torn.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wind driven generators, especially relates to a multi-lip 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, a sand blasting process and a zinc spraying process are used to process the bearing surface. Before sand blasting and zinc spraying, a set of rubber sealing ring is 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, and 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, and the service life is relatively short due to long ultraviolet radiation time. In the sand blasting process and the zinc spraying process during the processing of the bearing, the rubber sealing strip is repeatedly installed, the process is complicated, and the processing cost is high.

[0006] In the Chinese patent document, one invention publication with publication number CN110848269A, named a 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 cooperates 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 sealing lip of the above-mentioned rubber sealing ring has insufficient lip elasticity, the oil cannot supplement the lubrication of the lip, and when the lip is in contact with the inner side surface of the inner or outer ring of the variable pitch and yaw bearing, the sealing effect is poor, and improvement is needed. The utility model discloses a kind of multi-lip sealing rings for wind turbine variable pitch and yaw bearing, and oil is separated into multiple chambers storage, respectively lubricate different lip, to solve the technical problem that sealing effect is poor in prior art.

[0008] The utility model discloses a kind of multi-lip sealing rings for wind turbine variable pitch and yaw bearing, and oil is separated into multiple chambers storage, respectively lubricate different lip, to solve the technical problem that sealing effect is poor in prior art.

[0009] According to the above-mentioned purpose, the basic technical scheme of the utility model is: a kind of multi-lip sealing rings for wind turbine variable pitch and yaw bearing, including body, the body right side is equipped with sealing lip, it is characterized in that: the sealing lip includes upper seal lip and lower seal lip, the right side between the upper seal lip and lower seal lip is also equipped with lower seal lip two, the lower seal lip and lower seal lip two are also equipped with lower seal lip three, the section of the upper seal lip is triangular, and the included angle of its two edges is acute, and arc is equipped at the included angle, the section of the lower seal lip is strip-shaped, and the end is equipped with round angle, the upper seal lip and lower seal lip form right upper and left lower inclined arrangement, the lower seal lip two is strip-shaped, and one side is co-edge with the upper seal lip, and the lip portion forms a right angle and an obtuse angle, the lower seal lip three is short strip-shaped, and the lip end is formed with round angle, and the lower seal lip three is connected with the lower seal lip and lower seal lip two through the acute angle type inner concave arc left lower, right upper respectively.

[0010] Further, a sealing groove is formed on the outer ring or the inner ring of the pitch and yaw bearing, the cross section of the sealing groove is a long rectangle with one end opening, the lower bottom surface is provided with a slope surface, the upper edge of the sealing groove is in abutment with the upper sealing lip, the lower edge of the sealing groove is in abutment with the lower sealing lip two, the lower edge slope starting position of the sealing groove is in abutment with the lower sealing lip three, and the lower edge slope tail position of the sealing groove is in abutment with the lower sealing lip.

[0011] The multi-lip sealing ring for the pitch and yaw bearing of the wind driven generator further comprises a dustproof lip in rotational contact with the inner side surface of the outer ring or the inner ring of the pitch and yaw bearing.

[0012] Further, the dustproof lip is arranged on the right upper portion of the body and is substantially consistent with the extension direction of the sealing lip.

[0013] Further, the dustproof lip is arranged on the right upper portion of the body and is substantially consistent with the extension direction of the sealing lip.

[0014] Further, the dustproof lip is arranged on the right upper portion of the body and is substantially consistent with the extension direction of the sealing lip.

[0015] Compared with the prior art, the wind driven generator has the following advantages and beneficial effects:

[0016] 1. The sealing ring has multiple lips, i.e., the upper sealing lip, the lower sealing lip two, the lower sealing lip and the lower sealing lip three, which are in contact with the upper and lower side surfaces of the sealing groove, so that the grease is separated into multiple chambers for storage, different lips are lubricated, the grease is supplemented to each lip, the sealing effect is good, and the service life of the dustproof lip is prolonged.

[0017] 2. The dustproof lip is provided with an inner concave arc surface close to the lower portion, the inner concave arc surface can store the lubricating grease, the lubricating grease is supplemented to the dustproof lip, the dustproof lip is fully lubricated, and the service life of the dustproof lip is prolonged.

[0018] 3. The dustproof lip and the sealing lip are connected through the inner concave semicircle, the dustproof lip is provided with sufficient elastic space and is not torn. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a cross-sectional structure schematic view of the sealing ring;

[0020] Figure 2 It is a structure schematic view of the sealing lip installed on the outer ring of the bearing;

[0021] Figure 3 It is a structure schematic view of the sealing lip installed on the inner ring of the bearing;

[0022] In the drawings: 1. The body; 2. The sealing lip; 3. The upper sealing lip; 4. The lower sealing lip two; 5. The lower sealing lip; 6. The inner concave arc; 7. The dustproof lip; 8. The inner concave arc surface; 9. The lower sealing lip three. DETAILED DESCRIPTION

[0023] In combination Figures 1 to 3 , the utility model discloses a wind driven generator variable pitch and yaw bearing with multi-lip seal ring embodiment principle structure schematic diagram.

[0024] Embodiment 1, in combination Figure 1 , Figure 2 , the virtual line part in the drawing is the lip natural state, this wind driven generator variable pitch and yaw bearing with multi-lip seal ring includes the body 1, the body 1 right side is equipped with the sealing lip 2, the sealing lip 2 includes the upper seal lip 3 and the lower seal lip 5, the upper seal lip 3 and the lower seal lip 5 between right side are also equipped with the lower seal lip two 4, the lower seal lip 5 and the lower seal lip two 4 between are also equipped with the lower seal lip three 9, the section of the upper seal lip 3 is triangular, and the included angle of two edges is acute, and the included angle is equipped with a circular arc, the section of the lower seal lip 5 is long strip, and the end is equipped with a round angle, the upper seal lip 3 and the lower seal lip 5 form the right upper and left lower inclination arrangement together, the lower seal lip two 4 is long strip, and one side is co-edge with the upper seal lip 3, and the lip portion forms a right angle and an obtuse angle, the lower seal lip three 9 is short strip, and the lip end portion forms a round angle, and the lower seal lip three 9 is connected with the lower seal lip 5 and the lower seal lip two 4 through the acute angle type inner concave circular arc 6 left lower, right upper respectively.

[0025] Preferably, the outer ring of the variable pitch and yaw bearing is provided with a sealing groove, the section of the sealing groove is long rectangle with one end opening, the lower side bottom surface is provided with an inclined surface, the upper edge of the sealing groove is in abutment with the upper seal lip 3, the lower edge of the sealing groove is in abutment with the lower seal lip two 4, the lower edge inclined surface of the sealing groove starts to be in abutment with the lower seal lip three 9, and the tail of the lower edge inclined surface of the sealing groove is in abutment with the lower seal lip 5.

[0026] The multi-lip seal ring for wind driven generator variable pitch and yaw bearing also includes a dustproof lip 7 in rotational contact with the inner side surface of the outer ring of the variable pitch and yaw bearing, the dustproof lip 7 is arranged on the right upper portion of the body 1 and is basically consistent with the extension direction of the sealing lip 2, an inner concave arc surface 8 is arranged close to the lower portion of the dustproof lip 7, the dustproof lip 2 can be provided with lubricating grease supplement, and an inner concave semicircular connecting arc is arranged between the dustproof lip 7 and the sealing lip 2 to provide sufficient elasticity for the lip without being torn.

[0027] Embodiment 2, in combination Figure 1 , Figure 3, the dashed line part in the figure is the natural state of the lip, the wind turbine variable pitch and yaw bearing uses the multi-lip sealing ring, including the body 1, the right side of the body 1 is provided with the sealing lip 2, the sealing lip 2 includes the upper sealing lip 3 and the lower sealing lip 5, the right side between the upper sealing lip 3 and the lower sealing lip 5 is further provided with the lower sealing lip two 4, the lower sealing lip 5 and the lower sealing lip two 4 are further provided with the lower sealing lip three 9, the section of the upper sealing lip 3 is triangular, the included angle of the two edges is acute, the included angle is provided with a circular arc, the section of the lower sealing lip 5 is long strip-shaped, the end is provided with a round corner, the upper sealing lip 3 and the lower sealing lip 5 together form the right upper and left lower inclined arrangement, the lower sealing lip two 4 is long strip-shaped, one side is co-edges with the upper sealing lip 3, the lip part forms a right angle and an obtuse angle, the lower sealing lip three 9 is short strip-shaped, the lip end forms a round corner, the lower sealing lip three 9 is connected with the lower sealing lip 5 and the lower sealing lip two 4 through the acute angle type inner concave circular arc 6 left lower and right upper.

[0028] Preferably, the inner ring of the variable pitch and yaw bearing is provided with a sealing groove, the section of the sealing groove is long rectangle with one end opening, the lower side bottom surface is provided with a slope surface, the upper edge of the sealing groove is in abutment with the upper sealing lip 3, the lower edge of the sealing groove is in abutment with the lower sealing lip two 4, the lower edge slope start of the sealing groove is in abutment with the lower sealing lip three 9, the lower edge slope tail of the sealing groove is in abutment with the lower sealing lip 5.

[0029] Preferably, the above-mentioned wind turbine variable pitch and yaw bearing multi-lip sealing ring further includes the dustproof lip 7 in rotation contact with the inner side surface of the inner ring of the variable pitch and yaw bearing, the dustproof lip 7 is arranged on the right upper part of the body 1, is basically consistent with the extension direction of the sealing lip 2, the inner concave arc surface 8 is arranged on the lower part of the dustproof lip 7, can provide the sealing lip 2 with lubricating grease supplement, the dustproof lip 7 and the sealing lip 2 are provided with the inner concave semicircular connecting arc, can provide the lip with sufficient elasticity and not be torn.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0031] Although the terms of 1. body; 2. sealing lip; 3. upper sealing lip; 4. lower sealing lip two; 5. lower sealing lip; 6. inner concave circular arc; 7. dustproof lip; 8. inner concave arc surface; 9. lower sealing lip three 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 present application; any kind of additional limitation is contrary to the spirit of the present application.

[0032] The above has carried out the introduction to the multi-lip seal ring for the wind turbine variable pitch and yaw bearing provided by the utility model, the principle and implementation mode of the utility model are described in the introduction by applying the specific preferred embodiments, these embodiments are only used for helping understanding the principle and core thought of the utility model, it should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the design thought of the utility model, the implementation scheme in the above embodiment can be further combined or replaced, the utility model can be improved and modified several times, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A multi-lip seal ring for a wind turbine generator pitch and yaw bearing, comprising a body (1), the right side of the body (1) being provided with a sealing lip (2), characterized in that: The sealing lip (2) comprises an upper sealing lip (3) and a lower sealing lip (5), and a lower sealing lip two (4) is further arranged between the upper sealing lip (3) and the lower sealing lip (5), and a lower sealing lip three (9) is further arranged between the lower sealing lip (5) and the lower sealing lip two (4), the cross section of the upper sealing lip (3) is triangular, two edges of the upper sealing lip (3) are acute, and a circular arc is arranged at the acute angle, the cross section of the lower sealing lip (5) is long strip-shaped, and a round corner is arranged at the end of the lower sealing lip (5), the upper sealing lip (3) and the lower sealing lip (5) are arranged in a right upper and left lower inclined manner, the lower sealing lip two (4) is long strip-shaped, one side of the lower sealing lip two (4) is co-located with the upper sealing lip (3), a right angle and an obtuse angle are formed at the lip opening part of the lower sealing lip two (4), the lower sealing lip three (9) is short strip-shaped, a round corner is formed at the lip opening end of the lower sealing lip three (9), and the lower sealing lip three (9) is connected with the lower sealing lip (5) and the lower sealing lip two (4) in a smooth manner through an acute inner concave circular arc (6) left lower and right upper.

2. The multi-lip seal ring for wind turbine generator pitch and yaw bearing according to claim 1, characterized in that: The outer ring or the inner ring of the pitch and yaw bearing is provided with a sealing groove, the cross section of the sealing groove is long strip-shaped with one end being open, and a slope surface is arranged on the lower bottom surface, the upper edge of the sealing groove is in abutment with the upper sealing lip (3), the lower edge of the sealing groove is in abutment with the lower sealing lip two (4), the lower edge slope starting position of the sealing groove is in abutment with the lower sealing lip three (9), and the lower edge slope tail position of the sealing groove is in abutment with the lower sealing lip (5).

3. The multi-lip seal ring for a wind turbine generator pitch and yaw bearing according to claim 1 or 2, characterized in that: A dustproof lip (7) in rotational contact with the inner side surface of the outer ring or the inner ring of the pitch and yaw bearing is further included.

4. The multi-lip seal ring for wind turbine generator pitch and yaw bearing according to claim 3, characterized in that: The dustproof lip (7) is arranged on the right upper part of the body (1) and is basically consistent with the extension direction of the sealing lip (2).

5. The multi-lip seal ring for wind turbine generator pitch and yaw bearing according to claim 4, characterized in that: The dustproof lip (7) is provided with an inner concave arc surface (8) close to the lower part of the dustproof lip (7).

6. The multi-lip seal ring for wind turbine generator pitch and yaw bearing according to claim 3, characterized in that: An inner concave semicircular connecting arc is arranged between the dustproof lip (7) and the sealing lip (2).

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