(1) Function of accumulator
The accumulator is a device for storing the pressure of the control oil circuit. It is installed between the pilot pump and the PPC valve. Its function is to maintain the stability of the pressure of the control oil circuit and to put down the working device after the engine shuts down, so as to ensure the safety of the machine.
(2) working principle of accumulator
After the engine is started, the gas in bladder a is compressed by the oil pressure from the pilot pump.
After the engine stops, the gas in the skin bag continues to be compressed. At this time, after operating the PPC valve, the air bag expands depending on the pressure of the gas in room a. the oil in Room B acts as the control pressure oil to drive the main control valve. The working device moves downward under the action of its own weight.
(3) Precautions:
The accumulator is filled with high-pressure nitrogen, which is very dangerous if handled in the wrong way.
The accumulator shall not be perforated or burned with flame.
● do not weld any bosses on the accumulator.
● when handling the accumulator and it is necessary to bleed the accumulator, please contact the dealer.
