Talking about the exhaust process of hydraulic cylinder

In the daily hydraulic cylinder inspection and maintenance, if the hydraulic cylinder components are normal and there is no oil leakage, the air in the cylinder needs to be evacuated. If the air is not cleaned in time, the oil in the cylinder of the hydraulic press will mix with the air, which may cause the piston of the equipment to be unstable.
At this time, the air in the hydraulic cylinder must be discharged in advance. This needs to be done through ventilation equipment. The ventilation equipment of the hydraulic cylinder is generally placed at the upper end of the hydraulic circuit of the machine. At this time, if it is a casting equipment, a straightening device is required. the
At this time, due to the entry of air, the hydraulic cylinder may run at an abnormal speed, and the sealing member may also be burned due to the high temperature stroke of the heat insulation device. Therefore, for safety considerations, in foundry machinery, the exhaust equipment of the hydraulic cylinder is generally installed inside the cylinder below the piston. After installing the exhaust equipment, proper adjustments need to be made to achieve the desired exhaust effect. The following are the adjustment steps for hydraulic cylinder exhaust equipment. the
1. First reduce the operating pressure of the hydraulic cylinder to a suitable scale, and then start the hydraulic cylinder;
2. When the piston of the hydraulic cylinder is reciprocating, check whether the vibration and creeping conditions of the hydraulic cylinder are severe;
3. When the hydraulic cylinder piston alternates, seal the air outlet with gauze, and open the exhaust valve at the same time to complete the exhaust.