Wind turbine brake system

Abstract

The invention discloses a wind turbine brake system, which comprises an oil supply system, an accumulator, a solenoid directional valve and at least one group of symmetrically arranged hydraulic cylinders, wherein two hydraulic cylinders are arranged in one group. An output end of the oil supply system is connected with an input end of a check valve; an output end of the check valve is divided into three paths, wherein the first path is connected with the accumulator, the second path is connected with a rod cavity of the hydraulic cylinder and the third path is connected with the solenoid directional valve; and a motor in the oil supply system drives a pump through a first electromagnetic clutch. The wind turbine brake system also comprises a second electromagnetic clutch for connecting the pump and a high-speed shaft of a gearbox of a wind turbine transmission system; and an output end of the pump is connected with an oil tank through a pilot overflow valve. When the wind turbine brake system normally stops, the first electromagnetic clutch is controlled to be disconnected with power and the second electromagnetic clutch is controlled to be connected with power, so that the motor is disconnected with the pump, the pump is connected with the gearbox, the wind turbine is braked by consuming kinetic energy during rotation of an impeller, and excessive wear of a brake sheet is avoided.

Description

technical field [0001] The invention belongs to the field of new energy power generation, and in particular relates to a wind turbine braking system. Background technique [0002] Wind power belongs to the category of new energy. Under the background of national policy support and tight energy supply, green and non-polluting "new energy" such as solar energy, wind energy, geothermal energy and ocean currents are getting more and more attention. my country has abundant reserves of wind power resources, and wind turbine manufacturing technology is becoming more and more mature. In order to improve the reliability of the unit, various advanced technologies have been applied to modern wind turbines. Among them, the brake system is one of the key components of the wind turbine. The traditional brake technology is to use the friction between the brake pad and the brake disc to achieve the brake. This braking method is quite serious for the wear of the brake pad, which greatly affe...

AI Technical Summary

Problems solved by technology

The brake system disclosed in the above-mentioned invention patent, according to the working conditions of the wind turbine, uses the friction between the brake pad and the brake disc to achieve braking during normal shutdown and emergency shutdown. The wind turbine achieves flexible braking, but it will still cause the wear of the brake pads

When the wind turbine is normally shut down, the brake pads and brake discs are used for braking many times, which will cause excessive wear of the brake pads, making the wind turbine unable to brake safely in emergency conditions.

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