WANLONG
The hydraulic system is a critical component of stone polishing machinery and significantly impacts production efficiency. The following outlines common causes and solutions for malfunctions in the hydraulic system of stone polishing machines.
Working Mechanism Runs Too Slowly or Stops Completely
The main causes of this type of malfunction include: insufficient or no oil supply from the oil pump; severe system leakage; insufficient flow to the motor or cylinder; and the relief valve being set at too low a pressure to overcome the load resistance of the working mechanism. Specific causes and solutions are as follows:
(1) Incorrect oil pump rotation direction or insufficient oil suction; excessive resistance in the suction pipe; low oil level in the oil tank; air leakage in the suction pipe; poor sealing of the oil tank, resulting in the pressure inside the oil tank being lower than normal pressure (atmospheric pressure); excessively high oil viscosity or excessively low oil temperature; low motor speed; insufficient oil supply from the auxiliary oil pump. All of these factors can lead to insufficient oil suction by the oil pump, resulting in insufficient oil supply.
(2) Severe internal leakage in the oil pump. Wear of oil pump parts, increased sealing clearance (especially end face clearance), or casting defects in the pump body can cause the pressure oil to communicate with the suction chamber.
(3) The valve core of the relief valve or some valves in the pressure oil circuit are jammed by impurities, causing the inlet and return ports to be connected, and the pressure oil flows to the return circuit.
(4) Leakage in pipe joints and various valves in the pressure oil circuit, especially damage to the internal sealing devices of the motor or cylinder, resulting in severe internal leakage. After determining the cause of the malfunction, appropriate measures should be taken, such as repairing or replacing worn parts, cleaning relevant components, and replacing damaged sealing devices.
