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Working principle of accumulator capsule

  1. The accumulator capsule divides the accumulator into two chambers: gas and liquid. The capsule fill with nitrogen, and the chamber is composed of the capsule and the shell. The chamber fill with hydraulic oil. After being add to the outlet of the check valve. The gas volume in the capsule decreases with the increase of pressure. So as to absorb the impact hydraulic energy and reduce or eliminate the pressure impact of the system.
  2. In order to reduce or eliminate the pressure impact of the system. The general practice is to install a bladder accumulator near the pressure impact point for pressure buffering. However, due to the charging and discharging effect of the bladder accumulator. It is easy to oscillate repeatedly after absorbing the pressure. The solution is to add a one-way throttle valve on the access pipe section of the bladder accumulator. So that when the bladder accumulator absorbs the pressure impact, The hydraulic oil can smoothly enter the accumulator capsule. And when the hydraulic oil in the capsule returns, it will controll by throttling damping to eliminate oscillation.
  3. Add a one-way throttle valve on the access pipe section of the bladder accumulator. By properly adjusting the opening of the one-way throttle valve. The hydraulic oil can smoothly enter the accumulator capsule when the bladder accumulator absorbs the pressure impact. When the hydraulic oil in the leather bag returns. It will controll by throttling damping. The hydraulic resistance will increase, the pressure wave will significantly attenuat. And the oscillation times will significantly reduce. The minimum outlet pressure of the check valve is 8-6Mpa, max. 10- 8Mpa, and the peak value of impact decreases to about 60% of that of non bladder accumulator.


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