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Why does the brake of hoisting winch fail?

  • Release time: July 14, 2020
  • Publisher: s16dwl7ijq3wb5yt
  • Source: this station
  • Reading volume: 22

Consequences of hoist brake failure:

Lifting winch in the use of the process will often use the brake, good brake performance can ensure the safety of coal mine production, if the brake failure will cause sports car accidents, strict focus will cause casualties.

 Hoisting winch construction

Several reasons for brake failure of hoisting winch:

1. Overload work, any machinery can not overload work, due to the winch overload operation for a long time, machine heating, resulting in winch brake failure;

Solution: please follow the winch manual and work at rated load.

2. The grease falls between the brake belt and the brake wheel. Because the winch needs lubrication in the use process, if the operation is not careful, the grease will fall between the brake belt and the drum, which will reduce the friction force and lead to the brake failure of the winch;

Solution: clean and dry the contact surface.

3. The contact area between the brake belt and the brake wheel is too small. If the brake belt is deformed and falls into foreign matters, it will cause the winch brake failure. According to the coal mine safety operation regulations, the contact area between the brake belt and the brake wheel shall not be less than 80%,

Solution: adjust the contact area not less than 80%

4. Normal wear of brake belt. Long time braking will cause wear of brake belt. When the brake belt is worn to a certain extent, the distance between the brake belt and the drum will be larger and larger. When the brake stroke of the hoist winch reaches a large value, the contact force between the brake pad and the drum is not enough, resulting in the brake failure of the winch.

Solution: adjust the brake stroke or replace the brake band immediately.

 Parameters of hoisting winch

To sum up, I introduced the causes and solutions of brake failure of hoisting winch for you in detail. I believe you have a deeper understanding of hoisting winch.


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