reason

The damage to the bucket hydraulic cylinder is mainly due to the fracture of the steel ring on the piston due to factors such as fatigue. The piston is in direct contact with the metal of the hydraulic cylinder barrel. In the frequent expansion and contraction of the piston rod of the hydraulic cylinder, the fractured stubble constantly scrapes the inner wall of the hydraulic cylinder, which will strain the cylinder wall and cause internal leakage. The speed of the hydraulic cylinder is reduced, and finally the operation valve cannot control the action of the hydraulic cylinder.

measure

1. Operate in strict accordance with the operating procedures:

When the hydraulic cylinder is operated to the end of the stroke, a considerable part of the force will act on the limit ring inside the hydraulic cylinder, thereby reducing the service life of the equipment. Therefore, when overhauling the hydraulic cylinder, when replacing the sealing ring on the piston, the limit ring should also be replaced together to prevent it from fatigue fracture. When operating the hydraulic cylinder, a certain margin should be reserved as much as possible.

2.Second, the method of testing the hydraulic cylinder:

When the hydraulic cylinder moves slowly or does not move, you can check the appearance first, and then check the oil return filter element. Particles generated due to hydraulic cylinder wear and other reasons will follow the frequent work of the hydraulic cylinder piston, resulting in a part of the particles being intercepted by the oil return filter element in the process of flowing back to the oil tank with the working medium. If a large black rubber block, steel particles of different sizes, gray or light yellow are translucent nylon substances are found in the oil return filter element. It means that the hydraulic piston seal is damaged, the black rubber block comes from the piston seal ring, the steel particles come from the steel seal ring, and the gray or light yellow nylon material comes from the wear ring.

3. Check and record the maintenance time and hydraulic oil condition of the hydraulic breaker in time

Through the technical management of the hydraulic excavator for a long time, it is found that the hydraulic excavator is used in strict accordance with the operation and maintenance manual of the equipment. to be effective

Extend the service life of the equipment and improve the start-up rate of the equipment. Reduce equipment failures and realize the integration of man and machine.