Bearing sealing structure for wind power variable pitch

Abstract

The utility model discloses a bearing sealing structure for wind power variable pitch, which comprises a wind power bearing consisting of an inner bearing ring and an outer bearing ring, the outer bearing ring is fixed with a wind power hub, the inner bearing ring is provided with a butt joint pipe extending towards two ends, the inner bearing ring is provided with an annular positioning block arranged along the peripheral side of the butt joint pipe, and the outer bearing ring is provided with a sealing ring. An annular positioning block is fixed to the outer bearing ring, a lantern ring is fixed to the annular positioning block, a protective cover used for covering the front end of the outer bearing ring is fixed to the lantern ring, a waterproof protruding strip protruding outwards is arranged on the outer wall of the outer bearing ring, and an L-shaped waterproof plate covering the top of the waterproof protruding strip is arranged at the front end of the protective cover. The sealing cavity is formed among the lantern ring, the protective cover, the waterproof protruding strip and the waterproof plate, the opening of the wind power bearing is located in the sealing cavity, the sealing effect is achieved, water vapor on the outer wall is effectively prevented from entering the bearing, in addition, the structure has the advantage of being simple, and assembling and metering are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field related to wind turbine pitch-changing bearing seals, in particular to a bearing seal structure for wind turbine pitch-changing bearings. Background Art

[0002] At present, variable speed and variable pitch wind turbines are commonly used in large wind turbine generator sets. When assembling existing wind turbine pitch wind turbines, large bearings are required. The sealing effect of existing wind turbine bearings is poor. During the rainy season, external rainwater can easily enter the bearings, corroding the bearings and reducing the service life of the bearings. Utility Model Content

[0003] In order to solve the problem in the existing technology that large bearings are needed when assembling wind turbine pitch control, the existing wind turbine bearings have poor sealing effect, and in the rainy season, external rainwater can easily enter the interior of the bearings, thereby corroding the bearings and reducing the service life of the bearings, the utility model provides a bearing sealing structure for wind turbine pitch control.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model discloses a bearing sealing structure for wind turbine pitch control, comprising a wind turbine bearing consisting of an inner bearing ring and an outer bearing ring, wherein the outer bearing ring is fixed to the wind turbine hub, the inner bearing ring is provided with a butt joint tube extending to both ends, the inner bearing ring is provided with an annular positioning block installed along the circumference of the butt joint tube, a collar is fixed on the annular positioning block, and a shield for covering the front end of the outer bearing ring is fixed on the collar, and the outer wall of the outer bearing ring is provided with a waterproof ridge protruding outward, and the front end of the shield is provided with an L-shaped waterproof plate covering the top of the waterproof ridge.

[0006] As a preferred technical solution of the present invention, a waterproof gasket is provided between the collar and the annular positioning block.

[0007] As a preferred technical solution of the present invention, the contact surface between the waterproof plate and the waterproof convex strip (7) is provided with a rubber waterproof layer.

[0008] As a preferred technical solution of the present invention, a threaded column is provided on the annular positioning block, and a through hole for the threaded column to pass through is provided on the collar, and a locking cap is provided on the outer end of the threaded column.

[0009] As a preferred technical solution of the present invention, the connection between the locking cap and the collar is welded.

[0010] The beneficial effects of the utility model are:

[0011] In this wind turbine pitch bearing sealing structure, a sealed sealing cavity is formed between the collar, the shield, the waterproof ridge and the waterproof plate, and the opening of the wind turbine bearing is located in the sealed cavity, which plays a sealing role and effectively prevents water vapor on the outer wall from entering the interior of the bearing. In addition, the structure has the characteristics of simple structure and is convenient for assembly. The height of the connection gap between the waterproof plate and the waterproof ridge is as high as that of the outer bearing ring, so that rainwater on the surface of the outer bearing ring will not enter the interior of the bearing along the connection seam, thereby playing a good sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a structural diagram of a bearing sealing structure for wind turbine pitch control according to the present invention;

[0014] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0015] In the figure: 1. Inner bearing ring; 2. Outer bearing ring; 3. Butt pipe; 4. Annular positioning block; 5. Ring; 6. Protective cover; 7. Waterproof rib; 8. Waterproof plate; 9. Waterproof gasket; 10. Rubber waterproof layer; 11. Threaded column; 12. Locking cap. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0017] Example 1: Figure 1-2As shown, the utility model of the bearing sealing structure for wind turbine pitch control includes a wind turbine bearing consisting of an inner bearing ring 1 and an outer bearing ring 2, the outer bearing ring 2 is fixed to the wind turbine hub, the inner bearing ring 1 is provided with a docking tube 3 extending to both ends, the inner bearing ring 1 is provided with an annular positioning block 4 installed along the circumference of the docking tube 3, a collar 5 is fixed on the annular positioning block 4, and a shield 6 for covering the front end of the outer bearing ring 2 is fixed on the collar 5, and the outer wall of the outer bearing ring 2 is provided with an outwardly protruding waterproof ridge 7, and the front end of the shield is provided with an L-shaped waterproof plate 8 covering the top of the waterproof ridge. A sealed sealing cavity is formed between the collar 5, the shield 6, the waterproof ridge 7 and the waterproof plate 8, and the opening of the wind turbine bearing is located in the sealed cavity, which plays a sealing role and effectively prevents the water vapor on the outer wall from entering the interior of the bearing. In addition, the structure has the characteristics of simple structure and is convenient for assembly. The height of the connection gap between the waterproof plate and the waterproof ridge 7 is as high as that of the outer bearing ring, so that the surface of the outer bearing ring.

[0018] A waterproof gasket 9 is provided between the collar 5 and the annular positioning block 4, so that the collar 5 and the annular positioning block 4 have better sealing performance and prevent water vapor from entering the bearing through the connection seam.

[0019] The contact surface between the waterproof board 8 and the waterproof ridge 7 is provided with a rubber waterproof layer 10, so that there is a certain sealing effect between the waterproof board 8 and the waterproof ridge 7, preventing water from entering through the gap.

[0020] A threaded column 11 is provided on the annular positioning block 4, and a through hole is provided on the collar 5 for the threaded column 11 to penetrate. A locking cap 12 is provided at the outer end of the threaded column 11, which is convenient for installation and disassembly. The connection between the locking cap 12 and the collar 5 is welded, such as compared with traditional bolt fixation, to avoid the bolts from loosening and falling off. In the later maintenance, the collar and the locking cap can be damaged in a straight line, which will not affect the reuse of the bearing.

[0021] Working principle: A sealed sealing cavity is formed between the ring 5, the shield 6, the waterproof ridge 7 and the waterproof plate 8, and the opening of the wind turbine bearing is located in the sealed cavity, which plays a sealing role and effectively prevents the water vapor on the outer wall from entering the interior of the bearing. In addition, the structure has the characteristics of simple structure and is convenient for assembly. The height of the connection gap between the waterproof plate and the waterproof ridge 7 is as high as that of the outer bearing ring, so that the surface of the outer bearing ring.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bearing sealing structure for wind turbine pitch control, characterized in that: The invention comprises a wind turbine bearing consisting of an inner bearing ring (1) and an outer bearing ring (2), wherein the outer bearing ring (2) is fixed to the wind turbine hub, the inner bearing ring (1) is provided with a butt joint pipe (3) extending to both ends, the inner bearing ring (1) is provided with an annular positioning block (4) arranged along the circumference of the butt joint pipe (3), a collar (5) is fixed on the annular positioning block (4), and a shield (6) for covering the front end of the outer bearing ring (2) is fixed on the collar (5), and the outer wall of the outer bearing ring (2) is provided with an outwardly protruding waterproof ridge (7), and the front end of the shield is provided with an L-shaped waterproof plate (8) covering the top of the waterproof ridge.

2. The wind turbine pitch bearing sealing structure according to claim 1, characterized in that: A waterproof gasket (9) is provided between the collar (5) and the annular positioning block (4).

3. The wind turbine pitch bearing sealing structure according to claim 1, characterized in that: The contact surface between the waterproof plate (8) and the waterproof convex strip (7) is provided with a rubber waterproof layer (10).

4. The wind turbine pitch bearing sealing structure according to claim 1, characterized in that: The annular positioning block (4) is provided with a threaded column (11), and the collar (5) is provided with a through hole for the threaded column (11) to penetrate, and the outer end of the threaded column (11) is provided with a locking cap (12).

5. The wind turbine pitch bearing sealing structure according to claim 4, characterized in that: The connection between the locking cap (12) and the collar (5) is welded.

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