Mechanical fault diagnosis of hydraulic oil resistance caused by the solid matter       

Solid material mainly refers to the internal parts of the system wear down metal particles, seals and other solid fragments of solid material. The solid matter in the system often stuck in the cross section of objects than the part of the small section is accumulated, the oil through these sites through the ability to deteriorate, even in the oil pressure function together, so that the oil can not pass. These solid substances accumulate in the system to a certain extent, it will cause failure.

The external characterization of solid material resistance faults is usually slow, weak, unstable, good and bad, and can not meet the requirements of mechanical output. Solid matter resistance is easily mistaken as internal discharge and pressure drop fault.

As a IPF85B type concrete pump, hydraulic cylinder piston seal left to be washed out after failure timely for oil seal, but the maintenance staff did not clean out the pieces of the seal, after a period of working pump is obviously felt unable to work; at first thought is the system pressure is not enough, but with normal pressure. Dismantling was found to be sealed pieces together to block the oil inlet, the oil flows have generally, but the throttle pumping concrete, flow can not be guaranteed, pump truck show weakness.