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What causes the hydraulic pressure holding performance of the single-column hydraulic press to deteriorate

by:WORLD     2022-11-01
When the single-column hydraulic press is pressurized to a certain pressure, after stopping the equipment, the pressure can be maintained for a certain period of time, which is called holding pressure; after the end of the working stroke, it is necessary to continue to apply pressure to the workpiece, and the oil in the upper chamber of the cylinder closes the check valve to maintain pressure. effect. However, sometimes it is found that the pressure holding performance of the single-column hydraulic press is not very good. What is the reason for the poor pressure holding performance?












The reasons for the deterioration of the pressure holding performance of the single-column hydraulic press The hydraulic press manufacturer believes that there are the following points for reference.

1. The operation of inserting the valve into the solenoid valve of the single-column hydraulic press is frequent, its internal wear and tear, the one-way performance becomes worse, and the pressure holding performance becomes worse.



2. The main problem is that the hydraulic joint of the oil pipe of the hydraulic system of the single-column hydraulic press does not maintain pressure due to oil leakage.












3. The oil filling valve is also a one-way valve, if the internal wear or deformation will lead to poor pressure holding performance.



4. When the internal seal of the cylinder of the single-column hydraulic press is worn or aged, the pressure-holding performance will deteriorate.



The main function of the pressure keeping is lower than the set pressure. The oil maintains the pressure stability by adjusting the oil volume of the oil pump, so that the regulator limits the maximum pressure and avoids damage to the equipment due to excessive pressure.



When the single-column hydraulic press is running, the production needs a long time to maintain pressure, which can meet the needs of the product. However, the pressure holding time of the usual hydraulic press is about 10 minutes to 20 minutes, and sometimes the pressure is reduced. If the pressure holding performance is poor, it cannot be Meet the production requirements of the product.

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