Yaw brake

The invention discloses a yaw brake which comprises a fixing part, a brake body, a mounting bolt arranged on the brake body and an oil outlet formed in the brake body. The oil inlet component comprises an oil inlet pipe assembly arranged on the brake body, an oil filtering assembly arranged on the oil inlet pipe assembly and a collecting assembly arranged on the oil inlet pipe assembly. According to the yaw brake, the impeller rotates through impact force generated by flowing of oil, centrifugal force generated by rotation of the impeller enables the magnet to be close to the electromagnetic ring, the magnet and the electromagnetic ring attract each other, rotation of the impeller is hindered, and therefore the speed of the impeller is slowed down, the flow speed of the oil is reduced, and the flow of the oil is reduced; and the situation that a large amount of heat is generated due to friction increase in a pipeline due to the fact that the flowing speed of oil liquid is too large, a sealing piece is abraded