What's the matter with the four-column hydraulic oil cylinder not moving

1. Air enters the hydraulic system of the four-column hydraulic press. The main reason is that there is a leak in the hydraulic system. At this moment, you should check whether the liquid level of the hydraulic oil tank is high enough, whether the seals and pipe joints on the suction side of the hydraulic pump are tight, and whether the suction filter is too dirty. Fittings, clean or replace filter element.

2. The piston rod and the cylinder are stuck or the hydraulic cylinder is blocked. No matter how you operate it at this moment, the four-column hydraulic oil cylinder will not move or move very little. At this time, it is necessary to check whether the seal of the piston and piston rod is too tight, whether it has entered pollutants and colloidal deposits: whether the axis line of the piston rod and the cylinder barrel is aligned, and whether the wearing parts and seals are invalid.

3. The control pressure of the hydraulic system of the four-column hydraulic press is too low. The saving resistance in the control pipeline may be too large, the flow valve is not properly adjusted, and the control pressure is not suitable. At this time, the control pressure system should be checked to ensure that the pressure is adjusted to the specified value of the system.

4. The valve core is stuck or the valve hole is blocked. When the flow valve or directional valve spool is stuck or the valve hole is blocked, the four-column hydraulic cylinder is prone to malfunction or malfunction. At this moment, you should check the contamination status of the oil; check whether the pollutants or colloidal deposits are stuck on the valve core or block the valve hole; check the wear status of the valve body.

5. The initial action of the hydraulic cylinder of the four-column hydraulic press is slow. Under the condition of low temperature, the viscosity of the hydraulic oil is large and the fluidity is poor, resulting in the slow action of the hydraulic cylinder. The improvement method is to replace the hydraulic oil with better viscous function. At low temperature, the heater can be used or the machine itself can be heated to increase the oil temperature at startup.

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