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Reasons affecting the return speed of the hydraulic cylinder

by:WORLD     2022-09-25
The return spring of the reversing valve of the hydraulic press not only has insufficient elastic force, but also has a skew phenomenon, which causes the spool of the reversing valve to fail to return to its original position after the power is turned off, so the opening of the spool valve is too small, which is very difficult for the oil passing through the reversing valve. Liquid plays a throttling effect.












The initial action of the oil cylinder is slow. When the temperature is low, the viscosity of the hydraulic oil is relatively large and the activity is poor, which leads to the slow action of the hydraulic cylinder. If the outside temperature is really too low, it is possible to increase the oil temperature at startup with the help of a heater or corresponding insulation measures.




Check the contamination of the oil; check whether dirt or colloidal deposits are stuck on the valve core or valve hole, and check the wear of the valve body. The throttling resistance in the control pipeline may be too large, the flow valve may not be properly adjusted, the control pressure may not be appropriate, and the pressure source may be disturbed.














The control pressure of the hydraulic system of the hydraulic press is too low.

The piston rod of the hydraulic press is stuck with the cylinder barrel or the hydraulic cylinder is blocked. The way to cover it is to replace the hydraulic oil with better viscosity and temperature resistance in time. If the outside temperature is really too low, it is possible to increase the oil temperature at startup with the help of a heater or corresponding insulation measures. When the valve core is stuck or the valve hole is blocked, when the flow valve or the directional valve core is stuck or the valve hole is blocked, the hydraulic cylinder is prone to malfunction or malfunction at this time. The way to cover it is to replace the hydraulic oil with better viscosity and temperature resistance in time. At this time, it should be checked whether the piston and piston rod seals are too tight, whether dirt and colloidal deposits have entered; whether the axis line of the piston rod and the cylinder barrel is aligned, and whether the wearing parts and seals are invalid. At this time, no matter how the operation is performed, the hydraulic cylinder does not move or moves slightly.



When the temperature of the hydraulic press is low, the viscosity of the hydraulic oil is relatively large and the activity is poor, which leads to the slow movement of the hydraulic cylinder. At this time, the control pressure source should be checked to ensure that the pressure is adjusted to the delineated value of the system.

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