Multi-lip sealing ring for variable pitch and yaw bearings of fan

Abstract

The utility model provides a multi-lip sealing ring for a variable pitch and yaw bearing of a fan, 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 lower sealing lip II, 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 lower sealing lip II is provided with a lower 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 an upper right inclined mode and a lower left inclined mode together, the second lower sealing lip is in a short strip shape, one side of the second lower sealing lip and the upper sealing lip form an outer convex circle and an inner concave arc which are connected in an end-to-end mode, and the round corner is formed at the end of a lip opening. 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 fan 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 fan, 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 megawatt to large megawatt, 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 surface of the bearing. 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, 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 ring or outer ring, the sealing lip is matched with the sealing groove of variable pitch bearing and is contacted with variable pitch bearing inner and outer ring 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 ring or outer ring, 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 fan 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 fan 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 fan 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 of the upper seal lip and lower seal lip is also equipped with lower seal lip two, 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 lower seal lip two is short strip-shaped, and one side forms head-to-tail outer convex circle and inner concave circle with upper seal lip, the lip end is formed with round angle, and the other side is smoothly connected with lower seal lip by acute inner concave circle.

[0010] Further, the outer ring or the inner ring of the variable pitch and yaw bearing is provided with a sealing groove, the section of the sealing groove is rectangular 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 lower seal lip two and the lower seal lip.

[0011] The above-mentioned multi-lip sealing ring for fan variable pitch and yaw bearing also includes a dust lip in rotational contact with the inner side of the outer ring or the inner ring 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 lower sealing lip two are equipped, are equipped with multichannel lip, respectively with the upper and lower side of sealing groove contact, and the sealing effect is good.

[0017] 2. The utility model discloses a dustproof lip is arranged with concave arc surface in close proximity to its lower part, can store the grease in the inside, can provide the grease supplement for the dustproof lip, fully lubricates the dustproof lip, improves the service life of dustproof lip.

[0018] 3. The utility model discloses a dustproof lip and sealing lip between through concave semicircle are connected, provide sufficient elastic space for the lip and are not torn. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is cross section structure schematic diagram of the utility model product;

[0020] Figure 2 It is structure schematic diagram of product dustproof lip installation on bearing outer ring;

[0021] Figure 3 It is structure schematic diagram of product dustproof lip installation on bearing inner ring;

[0022] In the drawing: 1. The body;2. Sealing lip;3. Upper sealing lip;4. Lower sealing lip two;5. Lower sealing lip;6. Concave arc;7. Dustproof lip;8. Concave arc surface. DETAILED DESCRIPTION

[0023] Combined Figures 1 to 3 It is structure schematic diagram of the utility model a kind of fan variable pitch and yaw bearing with multilip sealing ring embodiment principle.

[0024] Embodiment 1, combined Figure 1 , Figure 2, the dashed line in the figure is the natural state of the lip, the fan 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 lower sealing lip two 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 long strip-shaped, and a round corner is arranged at the end, the upper sealing lip 3 and the lower sealing lip 5 together form a right upper and left lower inclined arrangement, the lower sealing lip two 4 is short strip-shaped, one side of the lower sealing lip two 4 and the upper sealing lip 3 form a head-to-tail outer convex circle and inner concave circle arc, the lip end forms a round corner, and the other side is smoothly connected with the lower sealing lip 5 through the acute inner 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 long rectangle 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 lower sealing lip two 4 and the lower sealing lip 5.

[0026] Preferably, the fan 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, an inner concave arc surface 8 is arranged close to the lower part 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, so that the lip is provided with sufficient elasticity and is not torn.

[0027] Embodiment 2, in combination Figure 1 , Figure 3 , the fan 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 lower sealing lip two 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 long strip-shaped, and a round corner is arranged at the end, the upper sealing lip 3 and the lower sealing lip 5 together form a right upper and left lower inclined arrangement, the lower sealing lip two 4 is short strip-shaped, one side of the lower sealing lip two 4 and the upper sealing lip 3 form a head-to-tail outer convex circle and inner concave circle arc, the lip end forms a round corner, and the other side is smoothly connected with the lower sealing lip 5 through the acute inner 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 long rectangle 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 lower sealing lip two 4 and the lower sealing lip 5.

[0029] Preferably, the multi-lip seal ring for fan pitch and yaw bearing as 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, which can provide the sealing lip 2 with grease supplement, and the inner concave semicircular connecting arc is arranged between the dust-proof lip 7 and the sealing lip 2, which can provide the lip with sufficient elasticity 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 them, without deviating from the spirit of the present application or exceeding 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; 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 by interpreting them is contrary to the spirit of the present application.

[0032] The above describes the multi-lip seal ring for fan pitch and yaw bearing provided by the present application, and the principle and implementation mode of the present application are described by applying the specific preferred embodiments in the description, and these embodiments are only used to help understand the principle and core idea of the present application. It should be pointed out that, for those skilled in the art, the implementation schemes in the above embodiments can be further combined or replaced, and 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 pitch and yaw bearing, comprising a body (1), a sealing lip (2) being provided on the right side of the body (1), and characterized in that: The sealing lip (2) comprises an upper sealing lip (3) and a lower sealing lip (5), and a lower sealing lip (4) is provided on the right side between the upper sealing lip (3) and the lower sealing lip (5). The cross-section of the upper sealing lip (3) is triangular, and the angle between its two sides is an acute angle, and an arc is provided at the angle. The cross-section of the lower sealing lip (5) is long strip, and its end is provided with a rounded corner. The upper sealing lip (3) and the lower sealing lip (5) together form an upper right and lower left inclined arrangement. The lower sealing lip (4) is short strip, and one side thereof forms an outer convex circle and an inner concave arc connected end to end with the upper sealing lip (3), and the end of the lip is rounded. The other side is smoothly connected to the lower sealing lip (5) through an acute angled inner concave arc (6).

2. The multi-lip seal ring for wind turbine pitch and yaw bearings according to claim 1 is characterized in that: A sealing groove is provided on the outer ring or the inner ring of the pitch and yaw bearings. The cross section of the sealing groove is a rectangle with one end open. The upper side of the sealing groove abuts against the upper sealing lip (3), and the lower side of the sealing groove abuts against the lower sealing lip (4) and the lower sealing lip (5).

3. The multi-lip seal ring for wind turbine pitch and yaw bearings according to claim 1 or 2, characterized in that: It also includes a dust lip (7) that is in rotational contact with the inner side of the outer ring or inner ring of the pitch and yaw bearing.

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

5. The multi-lip seal ring for wind turbine pitch and yaw bearings according to claim 4, characterized in that: The dustproof lip (7) is provided with an inwardly concave arc surface (8) close to its lower portion.

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

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