Common faults of overhead cranes

Overhead crane is a kind of hoisting machinery that is widely used in industrial and mining enterprises. Whether it can work normally will directly affect the completion of locomotive maintenance tasks and the safety of personnel and equipment. For this, FINEWORK CRANES summarizes some equipment manufacturers' faults and solutions .

The braking torque of the brake is unstable

The brake bracket is not concentric with the brake wheel, which is caused by the brake wheel colliding with the brake shoe during braking. Reinstall and adjust the brake bracket.

The brake wheel is not round and the radial pulsation is large. During the braking process, it periodically collides with the brake shoe and causes the brake torque to change. Re-brake the brake wheel to meet the technical requirements or replace the qualified brake wheel.

Common faults in mechanical transmission

Yuantai Crane means that the brakes are not working properly, the braking torque is small, and the hoisting structure has slipped hooks; the slipping phenomenon has occurred in the running mechanism. The reason analysis and the solution: oil stains on the surface of the brake wheel, and the reduction of the friction coefficient leads to the reduction of the braking torque, so the car cannot be stopped. It can be solved by cleaning the surface oil stains with kerosene or gasoline.

The brake shoe lining is severely worn, the rivets are exposed, and the rivets are in contact with the brake surface during braking. Not only reducing the braking torque cannot stop the car, but also straining the surface of the brake wheel, which is more harmful, just replace the brake shoe lining.

Improper adjustment of the main spring, low tension, resulting in a decrease in braking torque, and failure to stop the car, resulting in slipping or slipping. Re-adjust the brake to increase the tension of the main spring.

The brake is improperly installed; the brake frame and the brake wheel are not concentric or skewed, resulting in the slipping off the hook or the car. Usually, first loosen the anchor screws of the brake frame, and then tighten the brakes to make the brake shoes tightly hold the brake wheels. At this time, fill in the gap at the bottom of the suspended brake frame, and then tighten the anchor screws. It can achieve the two concentricity.