Yawing brake of blower

Abstract

The invention discloses a yawing brake of a blower. The yawing brake comprises a braking oil cylinder, damping springs, a fixed braking shoe and a movable braking shoe opposite to the fixed braking shoe, wherein the fixed braking shoe is mounted on the braking oil cylinder; a piston is mounted in the braking oil cylinder; the movable braking shoe is mounted on a push rod of the piston; the damping springs are mounted in the braking oil cylinder, and provide axial thrusts for the push rod; when the blower normally operates, the piston and the damping springs perform combined action to realize locking; when the blower performs yawing motion, only the damping springs provide rotary damping. The yawing brake has the advantages of simple structure, low cost, hydraulic oil leakage prevention, yawing oscillation reduction, long service life and the like.

Description

technical field [0001] The invention relates to wind power generating equipment, in particular to a wind turbine yaw brake. Background technique [0002] Wind power is a green and non-polluting new energy, which has been widely used in countries all over the world. After years of development, the domestic wind power market is basically mature, and the demand for wind power equipment is increasing rapidly. [0003] The yaw brake is an important part of the wind turbine braking system, and its braking performance directly determines whether the wind turbine can operate normally. Due to the advantages of convenient and adjustable pressure, hydraulic yaw brakes have been widely used in wind turbines. The yaw brake of the wind turbine realizes braking through the friction between the friction plate and the brake disc. When the wind direction changes, the nacelle at the top of the tower starts to yaw. The rotation provides a stable damping force to prevent the wind turbine from...

AI Technical Summary

Problems solved by technology

When the nacelle is in the process of braking from motion to rest, due to the asynchronous movement of the brake cylinder and the unbalanced load of the nacelle, the inner ring and outer ring of the slewing bearing are tilted relative to each other. During the tilting process, the brake piston generates a tangential force The large friction between the piston and the cylinder will cause the brake to vibrate, and the inner surface of the brake cylinder will be severely worn or roughened. On the one hand, the seal between the piston and the cylinder will be damaged, resulting in oil leakage and polluting the environment of the main engine. , when the oil leakage of the brake cylinder is serious, the brake will be in an abnormal working state, and the risk of fan operation will be greatly increased; on the other hand, the braking torque will be unstable, and the yaw vibration of the fan will be strengthened

At this time, it has to be shut down for maintenance, resulting in a reduction in the power generation efficiency of the wind farm

Images