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Tapered roller main bearing composite seal of wind turbine generator

A technology of tapered rollers and wind turbines, which is applied in wind power generation, wind engines, engines, etc., can solve the problems of difficult grease outlet, poor sealing effect, and increased grease pressure, so as to reduce grease pressure and improve sealing performance. Good and long life effect

Pending Publication Date: 2022-05-13
XEMC WINDPOWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor believes that the grease outlet hole is limited by the structure of the main shaft system, and the path of the grease outlet hole is relatively circuitous, so that the grease often needs to flow out through a complicated and long path, the resistance is relatively large, and the grease outlet hole is long and it is difficult to get out the grease.
After a long period of time, due to the accumulation, emulsification and dryness of grease, there will be more and more grease in the grease cavity, which will cause the pressure of grease in the grease cavity to rise continuously. leaks, poor seal

Method used

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  • Tapered roller main bearing composite seal of wind turbine generator
  • Tapered roller main bearing composite seal of wind turbine generator
  • Tapered roller main bearing composite seal of wind turbine generator

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, the embodiment of this application discloses a composite seal for the tapered roller 3 main bearing of a wind turbine. refer to figure 1 and figure 2 , a composite seal for the tapered roller 3 main bearing of a wind turbine, including a bearing body, the bearing body includes a bearing inner ring 1 and a bearing outer ring 2, the bearing inner ring 1 is connected to the tapered support in the fan, and the bearing outer ring 2 is connected to the power generation The connection of the machine, in another embodiment, can also be that the bearing inner ring 1 is connected with the generator, and the bearing outer ring 2 is connected with the conical support in the fan.

[0037] In the specific application of fan bearings, it can be two sets of single-row tapered roller bearings, or double-row tapered roller bearings. For double-row tapered roller bearings, two sets of tapered rollers 3 are arranged between the bearing inner ring 1 and the bearing outer ri...

Embodiment 2

[0048] Embodiment 2, with reference to Figure 4 The difference between this embodiment and Embodiment 1 is that the guide member 8 includes a positioning ring 13 and several vanes 12 distributed along the circumferential direction of the positioning ring 13 . The blade 12 is spiral and fixed on the inner side of the positioning ring 13. The positioning ring 13 is fixed on the bearing outer ring 2. When the positioning ring 13 rotates with the bearing outer ring 2, it can drive the blade 12 to rotate, and then drive the grease to flow. Further, the blade 12 is detachably connected to the positioning ring 13, and the blade 12 can be removed and replaced separately when the blade 12 is worn out, which is more convenient to use.

Embodiment 3

[0049] Embodiment 3, with reference to Figure 5 The difference between this embodiment and Embodiment 1 is that the bearing inner ring 1 is rotatably connected with an external gear 14, and a plurality of external gears 14 are evenly spaced along the circumferential direction of the bearing inner ring 1, and the external gear 14 and the helical gear meshing, the external gear 14 is located at the position where the grease outlet hole 9 is connected to the pilot oil chamber 6 .

[0050] When the helical gear rotates synchronously with the bearing outer ring 2, it will drive the outer gear 14 to rotate through meshing. Due to the relatively large number of teeth, the outer gear 14 will rotate at a high speed. Also through the guide oil chamber 6, the grease in the grease chamber 5 is sucked to the external gear 14; on the other hand, a thrust is generated so that the grease can be discharged from the grease outlet hole 9. The grease pressure at the seal ring is reduced, the re...

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Abstract

The invention relates to a composite seal of a tapered roller main bearing of a wind turbine generator, which belongs to the field of wind power generation and comprises a bearing body, the bearing body comprises a bearing inner ring and a bearing outer ring, and two groups of tapered rollers are arranged between the bearing inner ring and the bearing outer ring. Lubricating cavities used for containing lubricating oil are formed in the ends, close to each other, of the two sets of tapered rollers, grease cavities are formed in the ends, away from each other, of the tapered rollers, a guide oil cavity communicated with the grease cavities is formed between the bearing inner ring and the bearing outer ring, and the guide oil cavity is connected with a grease outlet hole. A guide part and a sealing part are arranged on the bearing inner ring or the bearing outer ring, the guide part is located in the guide oil cavity, and the sealing part is used for sealing the end, away from the grease cavity, of the guide oil cavity. The sealing structure has the effect of improving the sealing effect of the tapered roller main bearing of the wind turbine generator.

Description

technical field [0001] The present application relates to the field of wind power generation, in particular to a composite seal for a tapered roller main bearing of a wind turbine. Background technique [0002] With the increase of wind turbine MW and impeller diameter, tapered roller bearings are used more and more as main bearings of wind turbines. Tapered roller bearings include an inner ring and an outer ring. The typical layout when used in a fan is that the inner ring and the outer ring of the bearing are respectively connected to a stationary conical support or a rotating generator. In order to lubricate the bearing rollers and reduce Friction, a lubricating cavity is formed between the inner ring and the outer ring of the bearing, and when the roller rotates, it can be in contact with the grease in the lubricating cavity to lubricate. However, during the operation of the shaft, due to the pumping effect of the tapered rollers, the grease will be sucked out from the ...

Claims

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Application Information

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IPC IPC(8): F03D80/70
CPCF03D80/70Y02E10/72
Inventor 章滔何录忠聂威刘林傅诗捷
Owner XEMC WINDPOWER CO LTD