Pressure Adjustment Methods and Precautions for 300-ton Four-Column Hydraulic Press
Pressure Adjustment Methods for 300-ton Hydraulic Press:
1.Speed Control System:
- This system adjusts the flow control element's valve opening to achieve speed control. It can be classified into: a saving valve device in the oil inlet path, a saving valve device in the oil return path, and a saving valve device in the branch oil path.
2.Volume Control System:
- This system adjusts the displacement of the hydraulic pump or hydraulic motor of the four-column hydraulic press to achieve speed control. It includes: a variable pump-hydraulic cylinder system, a variable pump-variable hydraulic motor system, a quantitative pump-variable hydraulic motor system, and a variable pump-quantitative hydraulic motor system.
Precautions for Pressure Adjustment of 300-ton Four-Column Hydraulic Press:
1.The hydraulic system pressure should not exceed the pump pressure unless there is additional boosting.
2.The actual pressure of the pump depends on the load and is automatically generated, not manually adjusted. The given pressure should be understood as the pressure under normal working conditions.
3.When adjusting the relief valve pressure, closing the pump outlet by closing the throttle valve and directional valve in the neutral position, adjust the relief valve until the desired value is reached as the pump outlet pressure rises.