(1) The role of accumulator
The accumulator is a device that stores the control oil circuit pressure. It is installed between the pilot pump and the PPC valve. Its function is to keep the control oil circuit pressure stable and when the engine is turned off, the working device can still be put down to ensure the safety of the machine.
(2) The 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 is stopped, the gas in the bladder continues to be compressed. At this time, after the PPC valve is manipulated, the pressure of the gas in the A chamber is used to expand the bladder. The oil in the B chamber is used as the control pressure oil to drive the main control valve to work. The working device is under its own weight. Move down under the action of.
(3) Doosan excavator precautions
The accumulator is filled with high-pressure nitrogen, and it is very dangerous if it is handled in the wrong way.
Can not punch holes in the accumulator or burn with flames.
can not weld any boss on the accumulator.
When disposing of the accumulator and need to deflate the accumulator, please contact the dealer.
