Turntable bearing

Abstract

The invention discloses a turntable bearing which comprises an inner ring (1) and an outer ring (2); a first seal piece (3) is arranged between the upper end part of the inner ring (1) and that of the outer ring (2), and a second seal piece (4) is arranged between the lower end part of the inner ring (1) and that of the outer ring (2); the outer side of at least one of the first seal piece (3) and the second seal piece (4) is provided with an auxiliary seal ring capable of preventing one of the first seal piece (3) and the second seal piece (4) from falling off or being pressed open by oil pressure; and one end of the auxiliary seal ring is fixedly connected with the corresponding inner ring (1) or outer ring (2). The structural design of the turntable bearing can prevent the seal pieces between the inner ring (1) and the outer ring (2) from falling off or being pressed open by the oil pressure, so as to prevent the turntable bearing from losing effect, and prevent the expenditure of cost and high replacement cost of the turntable bearing.

Description

technical field [0001] The invention relates to the technical field of rotating components, in particular to a turntable bearing. Background technique [0002] The design life of pitch bearings and yaw bearings of wind turbines is up to 20 years. At present, there are often problems such as excessive refueling, uneven oil filling, untimely replacement of oil bags, blocked oil discharge, and aging of sealing rings, which lead to rubber failure. The sealing ring falls off, and the bearing runs at an altitude of 80-100 meters. Once it happens, it will generally lead to bearing failure because it cannot be found in time. When the bearing fails, it needs to be replaced. Since the generator set is at a high altitude and its weight is huge, it needs a special super-large-tonnage crane and other special equipment that can perform high-altitude operations to replace it. Therefore, the replacement cost is high, currently up to 50-60 Ten thousand yuan, the replacement cost is 10 times...

AI Technical Summary

Problems solved by technology

[0002] The design life of pitch bearings and yaw bearings of wind turbines is up to 20 years. At present, there are often problems such as excessive refueling, uneven oil filling, untimely replacement of oil bags, blocked oil discharge, and aging of sealing rings, which lead to rubber failure. The sealing ring falls off, and the bearing runs at an altitude of 80-100 meters. Once it happens, it will generally lead to bearing failure because it cannot be found in time.

When the bearing fails, it needs to be replaced. Since the generator set is at a high altitude and its weight is huge, it needs a special super-large-tonnage crane and other special equipment that can perform high-altitude operations to replace it. Therefore, the replacement cost is high, currently up to 50-60 Ten thousand yuan, the replacement cost is 10 times the price of a simple bearing

In addition, slewing bearings such as pitch bearings and yaw bearings are the weakest link in wind turbines. Once they are damaged, serious consequences will result. Top causes of damage

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