LiuGong CLG835H, Руководство по обслуживанию

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Structure Function Principle
January 24, 2017
Brake system CLG835H
Structure principle
Diaphragm type structure is adopted for the
accumulator, as shown in Figure below.
Diaphragm type accumulator is used to store
pressure oil for braking and hold pressure of
system. The operating principle is to isolate the
fluid under pressure from the air volume
chamber with pre-set pressure in the
accumulator with diaphragm and store them in
sealing housing. It absorbs and releases fluid for
braking due to change of pressure. When the
brake pump is operating, it inputs the
pressurized fluid into the accumulator via charge
valve to store energy, at this time, air in the air
chamber is compressed so that the pressure of
liquid is equal to air pressure to achieve energy
storage. Nitrogen charged into the accumulator
is non-flammable.
Accumulator charging parameter
Gas charging method of accumulator
1. Stop the machine, but do not turn off the
electric lock. Depress the brake continuously
for more than 20 times, and then press and
release the button of manual solenoid valve
for more than 20 times, drain high-pressure
oil in the accumulator. Then, unscrew the
plug of oil outlet at lower end of the
accumulator slowly. At this time, there is
residual pressure oil in the accumulator. Note
that the residual pressure oil shall not splash
onto person.
2. Remove the protective cap of gas charge
valve from upper end of one accumulator.
3. Connect as shown in Figure Below.
4. Turn on the switch of the nitrogen cylinder,
after reading of the pressure gauge is stable,
turn on the switch on gas charge tool, that is,
prop up the gas charge valve in the
accumulator and conduct gas charging.
5. As pressure may reach the limit
instantaneously, turn off the switch of
nitrogen cylinder, check whether the pressure
reaches limit after reading of pressure gauge
is stable. If insufficient, recharging it. If the
pressure is too high, conduct bleeding using
the bleeding plug on the gas charge tool and
reduce the pressure to a proper value.
Structure diagram of diaphragm type accumula-
tor
The accumulator housing may be hot so as to
cause burn.
1. Inflating port / hex locking screw
2. Pressure vessel
3. Diaphragm
5. Fluid side port
P18H00049
4. valve seat
1
2
3
4
5
Items
Parame-
ters
Items Parameters
Rated
capacity
1L\
0.26US
gal
Gas charging
pressure of
accumulator
BR1 & BR2 Below 20°C\
68°F
5.5MPa\
797.5psi
Rated
pressure 20MPa\
2900
Gas charging
pressure of
accumulator
BR3
Below 20°C\
68°F 9.2MPa\
1334psi
Pre-
charging
gas
Nitrogen
Charging pres-
sure of accumu-
lator BR1 & BR2 13.5~16MPa\
1957.5~2320
psi
Working
medium Hydraulic
oil
Charging pres-
sure of accumu-
lator BR3
16MPa\
2320psi