Braking device of wind power generation yaw bearing

Abstract

The invention relates to a braking device of a wind power generation yaw bearing; a yaw rotary bearing consists of an outer bearing ring and an inner bearing ring; the inner side surface of the lower part of the outer bearing ring is provided with an annular concave bearing braking surface; the lower end surface of the inner bearing ring is provided with more than one fan-shaped brake; two end surfaces of a fan-shaped brake surface part of a brake support are contacted and connected with the left contacting surface and/or the right contacting surface of a brake fan-shaped groove; and a brake lining pad is provided with a fan-shaped convex lining pad braking surface matched with the bearing brake surface. When in braking, damping moment force generates when the lining pad brake surface of the brake lining pad is contacted with the bearing brake surface, and the tangential force generated in the braking process acts on the left contact surface and/or the right contact surface where the brake support is connected with a brake base, so that braking abrasion of the brake lining pad is reduced. In the invention, a plurality of fan-shaped brakes arranged symmetrically are adopted for applying damping moment force on the bearing brake surface so that yaw braking of a wind power generation set can be realized.

Description

technical field [0001] The invention relates to a braking device for a wind power generation yaw bearing. Background technique [0002] In order to ensure the stable operation of wind turbines, there must be a device to track the change of wind direction, so that the wind rotor will automatically rotate accordingly to keep the wind rotor perpendicular to the wind direction. This device is the yaw system. The yaw system is generally composed of yaw bearings, yaw drive devices, yaw brakes, etc. High-power horizontal axis wind turbines mostly use active yaw systems. Since the yaw driving device drives the ring gear at the bottom of the nacelle through a cylindrical gear, in order to prevent the nacelle from deflecting with the change of the wind direction, especially when the yaw is stopped, the blade will not passively deviate from the wind direction due to the wind load. The crew should be equipped with a yaw brake. Yaw brakes usually use disc brakes, which give a preload t...

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Problems solved by technology

[0003] The main defects of this yaw brake device are: 1. The manufacturing precision of the brake disc is relatively high, that is, compared with the machine base, the flatness, parallelism and roughness of the brake disc are relatively high; 2. Lubricating oil is easy to remain on the surface of the yaw brake disc, which reduces the friction coefficient and needs to be cleaned frequently; 3. The structure of the brake is relatively complicated and the cost is high, and the layout of the brake is restricted by the structure of the engine room; 4. The diameter of the brake disc is large and The relative thickness is small, and deformation may occur during braking, which may easily cause unnecessary additional braking torque; 5. Compensation should be made at any time when the brake pads are worn, otherwise the damping torque will be insufficient, and in extreme cases, the entire yaw system may be damaged. unable to work properly

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