LGCY Series
Page 17
The oil cooler cools the circulating lubricating oil. The fins of the oil cooler are easily covered by dust
to affect the cooling effect, which may cause stop due to exhaust air overtemperature. Therefore, it
should be purged and cleaned at an interval to ensure its cooling effect.
B. Oil filter
The oil filter is a paper filter whose function is to remove impurities in the oil, such as metal particles,
oil deteriorated substance, etc., to protect the normal operation of the bearing and the rotor. The
filtration accuracy is between 10μ and 15μ. The oil filter is a one
-time consumable. If the oil filter is not
replaced in time, it may cause insufficient oil intake and the exhaust temperature rise at the handpiece,
which may cause shutdown. At the same time, insufficient oil may affect the service life of the main
engine bearing.
C. Oil-air Tank
Oil-air tank, also known as primary oil-air separator, separates oil from oil and air mixture based on the
mechanical collision method. An oil level indicator is installed at the tank side. A blowdown ball valve
is installed below the oil-air tank to eliminate the condensed water in the oil-air tank (The water is
coagulated at the bottom because it’s heavier than the oil). There is an oil filling port on the tank for
refuelling.
D. Oil Content Core
The oil core, also known as secondary oil-air separator, further separates the residual lubricating oil
based on the affinity coalescence method. The oil content core is made of multi-layer fine glass fiber.
The misty oil contained in the compressed air can be almost completely filtered through the oil content
core. The oil particle size can be controlled to be less than 0.1um and the oil content can be less than
5PPm. A small amount of lubricating oil separated by the oil core is concentrated in the groove at the
bottom of the oil core and is brought back to the low-pressure position of compressor such as air intake
port through the oil return check valve. Under normal operation, the oil core can be used for about
500-1000 working hours, but the quality of the lubricating oil and the surrounding environment have a
great impact on its service life. If the environmental pollution is very serious, you may consider
installing a front air filter. As for the selection of lubricating oil, it is necessary to use the special oil for
screw compressor recommended by us. Do not mix different grades of lubricating oil and use fake oil.
Generally, the oil content core damage can be judged by:
A. Checking whether the front and back pressure difference of oil content core exceeds 0.1Mpa with the
switching valve;
B. Checking whether the oil content in the air pipeline increases.
E. Thermostat valve
The equipment is equipped with a temperature control valve in front of the oil cooler. Its function is to
maintain the handpiece discharge temperature above the pressure dew point temperature to prevent the
water vapor in the air from being condensed in the oil-air tank to emulsify the lubricating oil. When the
equipment is turned on, the lubricating oil temperature is low. At this time, the temperature control valve
of the branch is opened, the main circuit is closed, and the oil directly enters the engine body without
Summary of Contents for JCD-900 Series
Page 25: ...LGCY Series Page 23 8 Wiring diagram...
Page 31: ...LGCY Series Page 29...