Press Machinery For The Aerospace Industry
Reasons for the failure of the hydraulic valve of the single-arm hydraulic press
by：WORLD
2023-01-07
The single-arm (single-column) hydraulic press is prone to failure of pressure regulation of the hydraulic system relief valve during use, which is manifested as: although the pressure regulating handle is fully tightened, the pressure cannot rise again when it rises to a certain value, especially when the oil temperature is high. especially notable. This article introduces the reasons for the failure of pressure regulation of the lower relief valve and how to eliminate this failure.
The main function of the single-arm (single-column) hydraulic pressure relief valve is to stabilize or protect the hydraulic system, and its performance has a great impact on the normal operation of the entire hydraulic system.
The relief valve uses the pressure of the spring to adjust and control the pressure of the hydraulic oil.
The pressure regulating process of the relief valve of the single-column hydraulic press:
Completely loosen the screw of the relief valve of the single-column hydraulic press, run the equipment, slowly tighten the screw, look at the pressure gauge, increase the pressure by several million Pa and then stop, let the equipment run stably under this pressure for a few minutes, and then repeat the pressure increase, During the running process, adjust to the set pressure.
The oil pump outlet of the hydraulic station of the single-column hydraulic press has a relief valve. For some reason, the pressure at the pump outlet may be higher than the pressure required by the system. At this time, the relief valve needs to discharge the excess pressure to return the oil to the oil tank.
During the operation of the single-arm hydraulic press, the pressure of the relief valve is adjusted to increase, but the pressure cannot rise to the maximum adjustment pressure, and the phenomenon of the pressure regulation failure of the relief valve occurs. The reasons are as follows:
1. The main valve core hole of the single-column hydraulic press is blocked, and the hydraulic pressure is not notified to the upper chamber of the main valve and the front chamber of the conical valve, and the pilot valve will lose the perception of the main valve pressure.
Since the upper chamber of the main valve of the single-column hydraulic press has no oil pressure, the elasticity is small, and the main valve becomes a direct-acting relief valve with small elasticity. Unable to build pressure.
The pressure of the single-column hydraulic press does not meet the requirements of the adjustment value, such as deformation or slow selection of the pressure regulating spring, excessive leakage in the valve or partial wear of a part of the pilot valve.
2. The orifice of the pilot valve seat of the single-column hydraulic press is blocked, the hydraulic pressure cannot reach the valve, and the same pilot valve is adjusted and destroyed by the pressure of the main valve; after the orifice is blocked, even if the pressure increases or decreases, the conical valve will not open. , resulting in no oil flow in the valve, and the oil pressure in the upper and lower chambers of the main spool is equal.
We are a performance driven culture that uses mechanical power press to ensure continuous improvement.
Do you want automatic power press machine mechanical power press? We also have automatic power press machine. visit World Press Machine to know more.
Turn to Shanghai Yingxin World Machinery Co., Ltd. if you are looking for premier automatic power press machine solution, affordable packages, and quality mechanical power press products! We produce wide series of high quality, first-class , and provide professional mechanical power press services at great prices.
The main function of the single-arm (single-column) hydraulic pressure relief valve is to stabilize or protect the hydraulic system, and its performance has a great impact on the normal operation of the entire hydraulic system.
The relief valve uses the pressure of the spring to adjust and control the pressure of the hydraulic oil.
The pressure regulating process of the relief valve of the single-column hydraulic press:
Completely loosen the screw of the relief valve of the single-column hydraulic press, run the equipment, slowly tighten the screw, look at the pressure gauge, increase the pressure by several million Pa and then stop, let the equipment run stably under this pressure for a few minutes, and then repeat the pressure increase, During the running process, adjust to the set pressure.
The oil pump outlet of the hydraulic station of the single-column hydraulic press has a relief valve. For some reason, the pressure at the pump outlet may be higher than the pressure required by the system. At this time, the relief valve needs to discharge the excess pressure to return the oil to the oil tank.
During the operation of the single-arm hydraulic press, the pressure of the relief valve is adjusted to increase, but the pressure cannot rise to the maximum adjustment pressure, and the phenomenon of the pressure regulation failure of the relief valve occurs. The reasons are as follows:
1. The main valve core hole of the single-column hydraulic press is blocked, and the hydraulic pressure is not notified to the upper chamber of the main valve and the front chamber of the conical valve, and the pilot valve will lose the perception of the main valve pressure.
Since the upper chamber of the main valve of the single-column hydraulic press has no oil pressure, the elasticity is small, and the main valve becomes a direct-acting relief valve with small elasticity. Unable to build pressure.
The pressure of the single-column hydraulic press does not meet the requirements of the adjustment value, such as deformation or slow selection of the pressure regulating spring, excessive leakage in the valve or partial wear of a part of the pilot valve.
2. The orifice of the pilot valve seat of the single-column hydraulic press is blocked, the hydraulic pressure cannot reach the valve, and the same pilot valve is adjusted and destroyed by the pressure of the main valve; after the orifice is blocked, even if the pressure increases or decreases, the conical valve will not open. , resulting in no oil flow in the valve, and the oil pressure in the upper and lower chambers of the main spool is equal.
We are a performance driven culture that uses mechanical power press to ensure continuous improvement.
Do you want automatic power press machine mechanical power press? We also have automatic power press machine. visit World Press Machine to know more.
Turn to Shanghai Yingxin World Machinery Co., Ltd. if you are looking for premier automatic power press machine solution, affordable packages, and quality mechanical power press products! We produce wide series of high quality, first-class , and provide professional mechanical power press services at great prices.
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