Daily inspections cannot be ignored
Brake shoe wear inspection
The brake shoe is a key component that directly contacts the brake wheel to achieve braking. In daily inspections, it is necessary to pay close attention to the wear of the brake shoe. Generally speaking, the amount of brake shoe wear should not exceed the specified value. Once excessive wear occurs, it will lead to insufficient braking force and affect the braking effect. Usually, the wear state is judged by observing the fit between the brake shoe and the brake wheel and measuring the thickness of the brake shoe. When the thickness of the brake shoe approaches or reaches the wear limit, it must be replaced in time.
Brake spring status inspection
The brake spring provides braking force for the brake, and its performance directly affects the braking effect. Check whether the spring has broken, deformed, fatigued, etc. If there is a problem with the spring, the braking force may be unstable or even unable to achieve effective braking. For example, a broken spring will cause the brake to lose part of its braking force instantly, which is very likely to cause safety accidents during the operation of the hoist. Regular appearance inspection of the spring and detection of whether its elastic force is within the normal range through professional equipment are important means to ensure the reliable operation of the brake spring.
Brake system connection inspection
The connection between the components of the brake system must be firm and reliable. Check whether the connecting bolts are loose, whether the pins are worn or moved, etc. Any problem in any connection part may cause the brake system to be insensitive or even cause brake failure. For important connection parts, anti-loosening measures should be adopted, such as installing spring washers, using thread lockers, etc., and tightening inspections should be carried out regularly.
Maintenance is crucial
Braking system cleaning
There is a lot of dust in the mine environment, which can easily enter the braking system and affect the normal operation of the brake. Clean the braking system regularly to remove dust, oil and other impurities on the surfaces of the brake wheel, brake shoe and various connecting parts. When cleaning, you can use special cleaning agents and clean rags to avoid using tools that may damage the brake parts. Keeping the braking system clean helps improve braking performance and extend the service life of the brake.
Brake fluid replacement and inspection
For mine hoists with hydraulic brakes, the quality and level of the brake fluid are directly related to the braking effect. Replace the brake fluid according to the prescribed cycle to prevent the fluid from deteriorating due to oxidation, contamination and other reasons. At the same time, check the fluid level regularly to ensure that the fluid level is within the normal range. Too low a fluid level may cause cavitation in the brake system, affecting the reliability of the brake; deterioration of the fluid will reduce the transmission efficiency of the brake system and even damage the hydraulic components. When replacing the fluid, choose high-quality fluid that meets the requirements of the equipment and operate in strict accordance with the operating procedures.
Lubrication of brake parts
Some moving parts in the brake system, such as pins, joints, etc., need to be lubricated regularly. Good lubrication can reduce friction between parts, reduce wear, and ensure flexible operation of the brake system. Use appropriate lubricants and lubricate according to the specified lubrication points and lubrication cycles. For example, for brakes working in high temperature environments, high temperature resistant lubricants should be selected; in humid environments, lubricants with rust-proof properties should be selected.
Strictly abide by operating regulations
Braking operation sequence
During the operation of the hoist, the correct braking operation sequence is crucial. When braking is required, the operating speed of the hoist should be gradually reduced first, and then the braking force should be applied smoothly. Avoid sudden and strong braking to avoid excessive impact on the hoist and the braking system. After the hoist stops running, make sure that the brake is completely in the braking state to prevent the hoist from starting again due to unexpected reasons. At the same time, when releasing the brake, it is also necessary to operate in the prescribed order, first release the brake, and then gradually start the hoist to avoid damage to the equipment caused by load starting.
Braking force adjustment
According to factors such as the weight of the material transported by the hoist, the lifting speed, and the operating conditions, the size of the braking force should be reasonably adjusted. Excessive braking force may cause excessive wear of the brake wheel and brake shoe, or even damage the equipment; too small braking force cannot guarantee the safe braking of the hoist. When adjusting the braking force, it is necessary to strictly follow the equipment operating procedures and relevant standards, and use professional testing equipment to test and adjust the braking force to ensure that the braking force meets the actual operation requirements.
Abnormal situation handling
During the operation of the elevator, if the brake is found to be abnormal, such as brake failure, abnormal noise or vibration during braking, etc., the elevator must be stopped immediately and corresponding emergency measures must be taken. At the same time, professional personnel should be organized in time to conduct a comprehensive inspection and maintenance of the brake system to find out the cause of the fault and eliminate the fault. Before the fault is eliminated, it is strictly forbidden to force the elevator to start, so as to avoid more serious safety accidents.
The correct use and maintenance of the brake of the mine hoist is an important part of ensuring the safe production of the mine. Only by paying great attention to the various precautions during the use of the brake and strictly implementing the requirements of daily inspection, maintenance and operation specifications can the safe and stable operation of the hoist be effectively guaranteed and a good safety environment can be created for mine production. It is hoped that the majority of mine operators can seriously study and implement this knowledge and jointly protect the safety of mine operations.
