The invention discloses a
yaw brake of a
wind power generation device and a controlling method of the
yaw brake of the
wind power generation device. The
yaw brake comprises two brake
calipers which are completely same with each other in structure, and the two brake
calipers are connected to the left side of a brake disc and the right side of the brake disc respectively in a symmetrical mode through eight high-intensity bolts. Each brake caliper is of a bilateral symmetrical structure, and comprises a brake support, a disc spring set, a guiding block, an adjusting bolt, a locking nut, a
piston, an abrasion indicator, a dustproof ring A, a high-pressure sealed ring A, a guiding belt A, a guiding belt B, a high-pressure sealed ring B, a guiding belt C and a dustproof ring B. According to the yaw brake of the
wind power generation device, a disc spring hydraulic combined loading mode is adopted, no hydraulic
system needs to provide pressure during the yaw process of a fan, the yaw
brake force is generated only through the loading of the disc
spring force, and a sealing device is prevented from bearing the action of the
hydraulic pressure and the
tangential force at the same time and being damaged during the yaw process. Multiple sets of guiding belts are adopted, the oil leakage problem is solved,
working pressure of a hydraulic controlling
system is reduced, and the service life of the sealing device can be effectively prolonged.