Southern Cross JCD-900 Series, Инструкция по эксплуатации

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LGCY Series Page 12
C. Screw Compressor
As the rotor rotates, the size of the intertooth space formed by the female and male rotors changes to
complete the suction, compression and discharge of air. At the same time of compression, the
lubricating oil is also injected into the compression chamber due to the pressure difference and mixed
with the air and discharged to the oil separator together.
D. Oil-air separator
In order to reduce the oil content in the exhaust air (i.e., reducing fuel consumption) and recycle the
lubricating oil in the unit, an oil separator must be used. The oil and air mixture from the compressor
enter the primary oil separator (oil-air tank), and most of the lubricating oil is separated based on the
mechanical collision method. Then, the oil and air mixture with greatly reduced oil content enters the
secondary oil-air separator (oil content core) at a lower flow rate. The residual lubricating oil is further
separated through affinity coalescence method.
E. Minimum Pressure Valve
The clean, separated compressed air is sent to the use system through the minimum pressure valve. The
minimum pressure valve has the opening pressure of about 0.45Mpa and mainly has the following
functions:
a. Establish the required cycle pressure of lubricating oil preferentially during start to ensure the
lubrication of the equipment.
b. The oil-air tank can be opened only after its pressure exceeds 0.45Mpa to reduce the air flow rate of
oil content core. The oil content core can be protected against damage due to large pressure difference in
addition to ensuring the separation effect of oil content core.
c. Non-return function: When the pressure in the oil and air tank drops after stopping, the compressed
air in the pipeline shall be prevented from flowing back.
F. Power Switch`
For switching on or off the main power of circuit.