First choose Mining Hoist Winch as the important wire rope, and then choose according to the safety factor of the lifting material or personnel and the number of cars to be upgraded. According to the requirements, according to the "Coal Mine Safety Regulations", Mining Hoist Winch must have various requirements. In addition, according to the lifting performance of Mining Hoist Winch, if personnel are lifted, the safety factor should be greater than the required requirements to ensure safety.
How to choose Mining Hoist Winch: First determine the length of the wire rope. L = lifting height (distance). The distance from the lifting point to the parking position of the wellhead container. Secondly determine the diameter of the wire rope: the diameter of the wire rope is determined by the strength and safety factor of the wire rope. The diameter of the drum / wire rope is not less than 80. Note: In general, the vertical axis is upgraded with 6 strands of 19 wires, and the inclined axis is usually upgraded with 6 strands of 7 wires.
Causes and Solutions of Mining Hoist Winch Failure
Mining Hoist Winch usually applies a brake during use. Good braking performance can ensure the safety of coal mine production. If the brakes fail, it will cause sports accidents, causing certain economic losses and casualties.
Let me talk about several reasons why Mining Hoist Winch has failed:
1. Overload work, no machinery can work overload, because Mining Hoist Winch is overloaded for a long time, the machine is very hot, causing the winch brake to fail;
Solution: Follow Mining Hoist Winch's instructions to work under rated load.
2. Grease falls between the brake belt and the brake wheel. Since Mining Hoist Winch requires lubrication during use, if the operation is unintentional, the oil will fall between the brake band and the rollers, which will result in reduced friction. Causing the Mining Hoist Winch brake to fail;
Solution: Clean and dry the contact surfaces.
3. The contact area between the brake belt and the brake wheel is too small. If the brake band deforms or falls into a foreign body, Mining Hoist Winch's brakes will malfunction. The rules for safe operation of coal mines stipulate that the contact area between the brake belt and the brake wheel cannot be lower than 80%.
Solution: Adjust the contact area to not less than 80%
4. The brake belt is worn normally. Long-term braking will wear the brake belt. When the brake belt wears to a certain extent, the distance between the brake belt and the reel will become larger and larger. At the same time, the brakes reached the maximum, and the contact between the brake pads and the reel was insufficient, and the brakes of the winch were disabled.
Solution: Adjust the brake stroke or replace the brake belt immediately.
