Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing

Abstract

The invention discloses a pitch bearing of a wind turbine generator. The pitch bearing of the wind turbine generator comprises a bearing inner ring, a bearing outer ring and a rolling body located between the bearing inner ring and the bearing outer ring. The vertical connection lips of the bearing inner ring and the bearing outer ring are each provided with a sealing ring. Sealing faces corresponding to the sealing rings are sealing faces processed through the stainless steel surfacing welding technology. Epoxy zinc-rich primer, epoxy micaceous iron oxide intermediate and fluorocarbon finish are sequentially sprayed on the surface of the bearing inner ring and the surface of the bearing outer ring. Solid molybdenum disulfide coatings are sprayed on the surfaces of driving teeth on the inner wall of the bearing inner ring. The invention further discloses an anti-corrosion processing method of the pitch bearing of the wind turbine generator. Due to the fact that the sealing lips are processed through the stainless steel surfacing welding technology and anti-corrosion processing is performed on the surface of the pitch bearing through triple anti-corrosion protection and the solid molybdenum disulfide coatings, the anti-corrosion performance of the pitch bearing is greatly improved, and the pitch beating can well meet the requirement of the offshore wind turbine generator. The pitch bearing of the wind turbine generator is low in cost, high in machining efficiency and beneficial to application and popularization.

Description

technical field [0001] The invention relates to the technical field of wind turbine pitch control, in particular to a wind turbine pitch bearing and an anti-corrosion treatment method thereof. Background technique [0002] Offshore wind power has the characteristics of rich resources, long power generation utilization time, no land occupation and suitable for large-scale development. It is the latest frontier of global wind power development. According to my country's "Twelfth Five-Year" energy plan and renewable energy plan, in 2015, my country will build 5 million kilowatts of offshore wind power, form a complete set of offshore wind power technologies and establish a complete industrial chain. After 2015, my country's offshore wind power will enter the In the stage of large-scale development, it has reached the international advanced technology level. In 2020, my country's offshore wind power will reach 30 million kilowatts. Therefore, offshore wind power is the developm...

AI Technical Summary

Problems solved by technology

[0003] However, offshore wind turbines are facing a series of technical problems, among which the corrosion of wind turbines by the humid and high-salt air in the ocean environment is a key issue. If this problem cannot be solved well, offshore wind turbines will be very Difficult to reach the designed service life

[0004] At present, special anti-corrosion coatings can be used for parts that are stationary and exposed to the air in the marine environment. Parts exposed to the air in the marine environment, due to the influence of sealing and other structures, require part of the surface of the part to be exposed, and anti-corrosion paint cannot be sprayed, so it is difficult to guarantee the anti-corrosion performance of this part

The inner and outer ring surfaces of the current offshore wind turbine pitch bearings and their sealing lips are directly exposed to the ocean environment air without anti-corrosion treatment. If things go on like this, this part will be the first to rust, and the corrosion will cause the sealing lip Excessive wear, reducing the sealing performance of pitch bearings

In addition, if the corrosion is severe, the load carrying capacity of the entire pitch bearing will be reduced, eventually leading to premature failure of the bearing

[0005] It can be seen that the above-mentioned existing wind turbine pitch bearing and its anti-corrosion treatment method obviously still have inconvenience and defects in structure and method, and need to be further improved urgently

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