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 and yaw bearing of a wind driven generator, which belongs to the technical field of wind driven generators and overcomes the defect of poor sealing effect of the existing rubber sealing ring, the sealing ring is provided with an upper sealing lip, a lower sealing lip and a right sealing lip, the section cutting plane of the upper sealing lip is triangular, the included angle of two sides of the upper sealing lip is an acute angle, and the right sealing lip is provided with a right sealing lip. The section cutting plane of the lower sealing lip is in a long strip shape, a round corner is arranged at the end of the lower sealing lip, the upper sealing lip and the lower sealing lip are arranged in a right-upper inclined mode and a left-lower inclined mode together, the right sealing lip is also in a long strip shape, one side of the right sealing lip and the upper sealing lip share the same edge, two corners are formed at the end of a lip opening, the upper right corner is an acute angle, and the lower left corner is an obtuse angle. According to the utility model, the plurality of lips are respectively contacted with the upper side surface and the lower side surface of the sealing groove, so that 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 internal lubricating grease of the bearing and preventing foreign matters from entering the internal 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 in 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 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 a kind of rubber sealing ring for fan yaw variable pitch bearing is disclosed, the present application discloses a kind of rubber sealing ring for fan yaw variable pitch bearing, including sealing ring body, the upper end of the sealing ring body is equipped with trapezoidal boss, lower end is equipped with mounting handle, left end is equipped with the fulcrum projecting forward, right end is equipped with dust lip and sealing lip, the trapezoidal boss is used for being detachably connected with protective sealing ring, one end of the sealing ring body is overlapped on the support platform of variable pitch bearing and the fulcrum is contacted with the inner wall of support platform, the mounting handle is inserted in the installation groove of variable pitch bearing, the dust lip is attached on the inner wall of variable pitch bearing inner circle or outer circle, the sealing lip is matched with the sealing groove of variable pitch bearing and is contacted with variable pitch bearing inner and outer circle to form sealing cavity.The present application solves the process cumbersome and sealing problem in the process of bearing processing, which can reduce the aging of sealing ring, greatly prolong the service life of sealing ring, while the pressure maintaining capacity is good, can effectively prevent lubricating grease leakage.

[0007] But the sealing lip of the above-mentioned rubber sealing ring has insufficient lip elasticity, and when it is in contact with the inner side of the variable pitch and yaw bearing inner circle or outer circle, the sealing effect is poor, which is a technical problem that we need to solve urgently. The utility model discloses a kind of multi-lip sealing rings for wind turbine variable pitch and yaw bearing, to solve the above technical problems existing in prior art.

[0008] The utility model discloses a kind of multi-lip sealing rings for wind turbine variable pitch and yaw bearing, to solve the above technical problems existing 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 right seal lip, the section of the upper seal lip is triangular, and the included angle of its two edges is acute, and the included angle is equipped with circular arc, 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 right seal lip is also strip-shaped, and one side is co-edge with upper seal lip, and the end of lip is formed two angles, right upper angle is acute, left lower angle is obtuse, and the other side is smoothly connected with lower seal lip by acute angle type inner concave circular arc.

[0010] Further, the outer circle or inner circle of the variable pitch and yaw bearing is provided with a sealing groove, the section of the sealing groove is a long rectangle with one end opening, the upper edge of the sealing groove is in abutment with the upper seal lip, and the lower edge of the sealing groove is in abutment with the right seal lip and the lower seal lip.

[0011] The above-mentioned multi-lip sealing ring for wind turbine variable pitch and yaw bearing also includes a dust lip in rotational contact with the inner side of the outer circle or inner circle of the variable pitch and yaw bearing.

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

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

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

[0015] Compared with the prior art, the utility model has the advantages and beneficial effects of:

[0016] 1. The utility model discloses a sealing lip, a lower sealing lip and a right sealing lip are arranged, a plurality of lips are arranged and are in contact with the upper and lower sides of the sealing groove respectively, and the sealing effect is good.

[0017] 2. The utility model discloses a dustproof lip is arranged on the lower part of the dustproof lip and is provided with a concave arc surface, grease can be stored in the inside, the dustproof lip can be supplemented with the grease, the dustproof lip is fully lubricated, and the service life of the dustproof lip is improved.

[0018] 3. The dustproof lip and the sealing lip of the utility model are connected through a concave semicircle, the lips are provided with sufficient elastic space and are not torn. DRAWINGS

[0019] Figure 1 It is a sectional view structure schematic view of the utility model product.

[0020] Figure 2 It is a structure schematic view of the dustproof lip of the product being installed on the bearing outer ring.

[0021] Figure 3 It is a structure schematic view of the dustproof lip of the product being installed on the bearing inner ring.

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

[0023] Combined Figures 1 to 3 It is a wind driven generator variable pitch and yaw bearing multi-lip sealing ring embodiment principle structure schematic view of the utility model.

[0024] Embodiment 1, combined Figure 1 , Figure 2, the dashed line in the figure is the natural state of the lip, the wind turbine variable pitch and yaw bearing with multi-lip seal ring, comprising a body 1, the right side of the body 1 is provided with a sealing lip 2, the sealing lip 2 comprises an upper sealing lip 3 and a lower sealing lip 5, the right side between the upper sealing lip 3 and the lower sealing lip 5 is further provided with a right sealing lip 4, the cross section of the upper sealing lip 3 is triangular, the included angle of the two edges is acute, and a circular arc is arranged at the included angle, the cross section of the lower sealing lip 5 is 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 together form a right upper and left lower inclined arrangement, the right sealing lip 4 is also strip-shaped, one side of the right sealing lip 4 is co-edges with the upper sealing lip 3, the end of the lip forms two angles, the right upper angle is acute, and the left lower angle is obtuse, and the other side is smoothly connected with the lower sealing lip 5 through the acute type of concave arc 6.

[0025] Preferably, a sealing groove is formed on the outer ring of the variable pitch and yaw bearing, the cross section of the sealing groove is rectangular with one end open, the upper edge of the sealing groove is in abutment with the upper sealing lip 3, and the lower edge of the sealing groove is in abutment with the right sealing lip 4 and the lower sealing lip 5.

[0026] Preferably, the wind turbine variable pitch and yaw bearing with multi-lip seal ring further comprises a dustproof lip 7 in rotational contact with the inner side of the outer ring of the variable pitch and yaw bearing, 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, the dustproof lip 7 is closely arranged with an inner concave arc surface 8 at the lower part thereof, so as to provide the sealing lip 2 with grease supplement, and a concave semicircular connecting arc is arranged between the dustproof lip 7 and the sealing lip 2, so as to provide the lip with sufficient elasticity without being torn.

[0027] Embodiment 2, in combination Figure 1 , Figure 3 , the dashed line in the figure is the natural state of the lip, the wind turbine variable pitch and yaw bearing with multi-lip seal ring, comprising a body 1, the right side of the body 1 is provided with a sealing lip 2, the sealing lip 2 comprises an upper sealing lip 3 and a lower sealing lip 5, the right side between the upper sealing lip 3 and the lower sealing lip 5 is further provided with a right sealing lip 4, the cross section of the upper sealing lip 3 is triangular, the included angle of the two edges is acute, and a circular arc is arranged at the included angle, the cross section of the lower sealing lip 5 is 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 together form a right upper and left lower inclined arrangement, the right sealing lip 4 is also strip-shaped, one side of the right sealing lip 4 is co-edges with the upper sealing lip 3, the end of the lip forms two angles, the right upper angle is acute, and the left lower angle is obtuse, and the other side is smoothly connected with the lower sealing lip 5 through the acute type of concave arc 6.

[0028] Preferably, a sealing groove is formed on the outer ring of the variable pitch and yaw bearing, the cross section of the sealing groove is rectangular with one end open, the upper edge of the sealing groove is in abutment with the upper sealing lip 3, and the lower edge of the sealing groove is in abutment with the right sealing lip 4 and the lower sealing lip 5.

[0029] Preferably, the multi-lip seal ring for the pitch and yaw bearing of the wind turbine described above further comprises a dust-proof lip 7 in rotational contact with the inner side surface of the inner ring of the pitch and yaw bearing, the dust-proof lip 7 is arranged on the right upper part of the body 1, and the extending direction of the dust-proof lip 7 is basically consistent with the extending direction of the sealing lip 2, the inner concave arc surface 8 is arranged close to the lower part of the dust-proof lip 7, the dust-proof lip 2 can be provided with grease supplement, and the inner concave semicircular connecting arc is arranged between the dust-proof lip 7 and the sealing lip 2, so as to provide sufficient elasticity for the lip without being torn.

[0030] The specific embodiments described herein merely exemplify 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 use similar ways to replace, 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. right sealing lip; 5. lower sealing lip; 6. inner concave circular arc; 7. dust-proof lip; 8. inner concave arc surface are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only for more convenient 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 multi-lip seal ring for the pitch and yaw bearing of the wind turbine provided by the present application is introduced above, and the principle and implementation mode of the present application are described by applying the specific preferred embodiments, these embodiments are only used to help understand the principle and core idea of the present application, it should be pointed out that for ordinary skilled in the art, the implementation schemes in the above embodiments can be further combined or replaced, the present application can be improved and modified in several ways without deviating from the design idea of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

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 right sealing lip (4) is further arranged between the upper sealing lip (3) and the lower sealing lip (5); 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 right sealing lip (4) is also long strip-shaped, one side of the right sealing lip (4) is co-located with the upper sealing lip (3), two corners are formed at the lip opening end, the right upper corner is acute, and the left lower corner is obtuse; and the other side of the right sealing lip (4) is smoothly connected with the lower sealing lip (5) through an acute inner concave circular arc (6).

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

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

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 substantially 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 closely arranged with an inner concave arc surface (8) at 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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