Main shaft sealing device used in wind turbines

Abstract

The invention provides a main shaft sealing device used in a wind turbine, which is composed of a moving ring and a static ring, and the static ring includes a static ring connecting ring arranged in the axial direction and a static ring fixing ring and a static ring arranged in the radial direction. ring seal ring, the fixed ring of the static ring is attached to the end cover and is connected and fixed with the end cover by bolts, and the sealing cavity is formed between the seal ring of the static ring, the connecting ring of the static ring and the end cover; the cross section of the moving ring is L type, including a moving ring sealing ring arranged radially and a moving ring connecting ring arranged axially, the moving ring connecting ring is sleeved on the shaft sleeve and fixed with the shaft sleeve, and the outer circumference of the moving ring sealing ring is provided with A sealing lip, the sealing lip is located in the sealing chamber, and the sealing lip is in close contact with the inner wall of the static ring sealing ring and the outer wall of the end cover for sealing. The device can be reconstructed and installed online on the basis of the structure of the original main shaft of the wind power generating set, so as to improve the sealing performance of the wind generating set and reduce the labor intensity of the maintenance staff.

Description

technical field [0001] The invention provides a sealing device, in particular a sealing device used for online transformation and installation of a rotating main shaft in a wind power generator, and belongs to the technical field of mechanical sealing. Background technique [0002] A wind turbine is a device that converts wind energy into electrical energy, and is mainly composed of blades, generators, mechanical components and electrical components. Because wind turbines are installed high in the sky, it is quite difficult to overhaul and maintain them. With the increase of capacity, the complexity of the unit is getting higher and higher. In order to ensure the safe production and operation of the unit, reducing the leakage of the unit is an important maintenance work of the wind power generation unit. The components involved in sealing of wind turbines include: main shaft assembly, main gearbox, yaw reducer, pitch reducer, yaw bearing, pitch bearing, etc. The leakage of...

AI Technical Summary

Problems solved by technology

However, for some early and mid-term products, the sealing performance of the original main shaft sealing device is greatly reduced due to wear and tear during use, resulting in different degrees of leakage

For these wind turbines, since the early structural design has been finalized and the unit has been installed to the top of the tower, it is not possible to reinstall the new sealing device, and the leakage can only be mitigated through continuous maintenance

Images