Braking starter of horizontal axle windmill

Abstract

The invention relates to a braking starter of a horizontal axle windmill, which aims to rapidly stop, improve the braking efficiency, reduce abrasion and prolong the service life of a gearbox at a high speed, start the windmill at a low wind speed, reduce the cut-in wind speed and improve the utilization efficiency of effective wind energy. A braking disc 1 is arranged on a transmission axle 6, and the plane where the braking disc 1 is on is vertical to the axis OO' of the transmission axle 6; the axis PP' of electromagnetic coils 5 is parallel to the axis OO' of the transmission axle 6; the middle end of the lower part of a U-shaped electromagnet 2 is arranged in the electromagnetic coils 5, two magnetic poles 3,4 of the U-shaped electromagnet are arranged in opposite, the outer edge of the braking disc 1 is arranged between the two opposite magnetic poles 3,4 of the U-shaped electromagnet 2, and a plurality of U-shaped electromagnets 2 are respectively arranged along the circumferential direction of the braking disc 1.

Description

technical field [0001] The invention relates to a driving and braking device for a horizontal axis wind turbine. Background technique [0002] In the prior art, the brake system of wind turbines is generally composed of two sets of brake systems: pneumatic brake and mechanical brake. On the high-speed shaft of the transmission system, hydraulically driven disc-type mechanical brake devices are mostly used. When braking, the hydraulic system drives the brake device equipped with brake pads. The friction between the brake pads and the brake disc will generate friction torque to complete the braking process. . Since the mechanical brake is based on friction, especially the high-speed running system is required to stop in a short period of time, the brake pads and brake discs will wear out and generate a lot of heat, which directly leads to brake failure; secondly, due to the hydraulic system High pressure is required, and there are high requirements for the sealing parts of t...

AI Technical Summary

Problems solved by technology

Since the mechanical brake is based on friction, especially the high-speed running system is required to stop in a short period of time, the brake pads and brake discs will wear out and generate a lot of heat, which directly leads to brake failure; secondly, due to the hydraulic system High pressure is required, and there are high requirements for the sealing components of the hydraulic system, and seal failures also occur from time to time, resulting in oil leakage in the hydraulic system, causing pollution and safety hazards to the working environment; again, for non-direct drive wind turbines, due to With the existence of the speed-up gearbox, the mechanical brake system has vibration and inertial impact on the gearbox, which has a great destructive effect on the gearbox. In addition to generating noise, it will also cause the gearbox to break teeth or fail

Its shortcomings are: it is difficult to stop at high speed, the mechanical wear is large, the impact on the gearbox is large, and there is oil leakage.

In addition, especially large-scale wind turbines are difficult to start when the wind speed is low, the cut-in wind speed is high, and the effective wind energy utilization efficiency is low. The current mechanical brake device only functions as a brake and does not help start.

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