Double-crossing mutual-perpendicular yaw bearing

Abstract

The invention relates to a double-crossing mutual-perpendicular yaw bearing. The double-crossing mutual-perpendicular yaw bearing comprises an outer ring, an inner ring and rolling bodies. Two columnsof inner raceways are arranged on the inner ring. Each column of inner raceway is enclosed by three surfaces. Two end surfaces and the rolling surface of each rolling body are in contact with three surfaces of each column of inner raceway respectively. A first inner raceway and a second inner raceway constitute the two columns of inner raceways. The surface, in contact with the first inner raceway, of the rolling surface of one rolling body is adopted as a first inner raceway surface, and the surface, in contact with the second inner raceway, of the rolling surface of the other rolling body is adopted as a second inner raceway surface. The outer ring is of a two-body type structure and composed of a first outer ring and a second outer ring. A first outer raceway surface matched with the first inner raceway surface is arranged on the first outer ring. A second outer raceway surface matched with the second inner raceway surface is arranged on the second outer ring. The first inner raceway surface and the second inner raceway surface are perpendicular to each other. According to the double-crossing mutual-perpendicular yaw bearing, two rows of rolling bodies which are perpendicular to each other are placed in the two columns of raceways, the structure is compact, and the axial direction bearing capacity and radial direction bearing capacity of the double-crossing mutual-perpendicular yaw bearing are improved.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a double cross and mutually perpendicular yaw bearing. Background technique [0002] In recent years, with people's gradual recognition of clean energy, our understanding of wind power generation has become more and more in-depth, and the proportion of wind power generation has also increased. As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Wind power has developed rapidly around the world, and has even become the main source of electricity in some countries. As a key component of wind turbines, the yaw bearing is used to control the windward angle of the nacelle and blades in conjunction with the pitch bearing. When the wind speed is lower than the rated When the wind speed is high, the windward angle of the nacelle and the hub is increased through the rotation of the yaw bearing, so that the wind turbine can ...

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Problems solved by technology

[0003] With the continuous development of the wind power industry, small-power and small-megawatt wind turbines have gradually lost their competitive advantages. Domestic and foreign complete machine manufacturers are eager to develop large-power and large-diameter wind turbines of 3.0MW and above. However, due to transportation problems and Affected by cost pressure, bearings with compact structure and high load capacity have become a development trend. Moreover, a large part of wind turbine bearings depends on foreign imports, and foreign bearings are expensive and have long delivery cycles, which restricts the overall development of domestic wind turbines. machine business development

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