(1) The role of the accumulator
The accumulator is a device for storing and controlling the oil pressure. It is installed between the pilot pump and the PPC valve. Its function is to maintain the stability of the oil pressure and when the engine is turned off, the working device can still be put down to ensure the safety of the machine.
(2) Working principle of the accumulator
After the engine is started, the gas in the bladder A chamber is compressed by the oil pressure from the pilot pump.
After the engine stops, the gas in the bladder continues to be compressed. At this time, after the PPC valve is operated, the air bag is expanded by the pressure of the gas in the A chamber, and the oil in the B chamber drives the main control valve to work as the control pressure oil. The working device is under its own weight Move down under the action of.
(3) Precautions for Doosan excavator
The accumulator is filled with high-pressure nitrogen, which is very dangerous if it is handled in the wrong way.
Do not punch holes in the accumulator or burn it with flames.
Do not weld any boss on the accumulator.
When disposing of the accumulator and need to deflate from the accumulator, please contact the dealer.
