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1.0 General rules and specifications for screw air compressors
1.1 Brief introduction of Screw injection Air Compressor
Fuel injection screw air compressor has become the mainstream of the development of air compressor in
the world. It has the characteristics of reliable operation, less easily damaged parts, low vibration, low noise,
low oil content and high efficiency. During the compression process, the compressor continuously injects
lubricating oil into the compression chamber and bearing by virtue of the pressure difference produced by the
compressor itself.
Lubricating oil has three main functions:
1.1.1 Lubricating effect
: lubricating oil can form oil film between rotors, avoid contact between rotors and
reduce friction.
1.1.2 Sealing effect
: the oil film produced by lubricating oil can seal the compressed air and improve the
volume efficiency of compressor.
1.1.3 Cooling
: because the lubricating oil absorbs a large amount of compression heat, the compression
process is close to isothermal compression and the specific power of the compressor is reduced. In addition,
the lubricating oil can also reduce the noise generated by high frequency compression.
1.2 Block structure of Screw Air Compressor
1.2.1 Basic structure
The company uses a screw type air compressor, is a two-axis volumetric type of compressor. The
air inlet is opened at the upper end of the housing, and the exhaust port is opened at the lower part
(some of the air ends are also on top). A pair of high precision main and auxiliary rotors is arranged
horizontally and parallel in the inner part of the housing. The diameter of the main rotor is larger
and the number of teeth is less, the diameter of the secondary rotor is smaller and the number of
teeth is more. The teeth form a spiral around the outer edge of the rotor and the tooth shapes of the
two engage each other. The main and secondary rotors are supported by bearings respectively, one
roller bearing is arranged at the inlet end and two conical roller bearings are installed
symmetrically at the exhaust end. The body is divided into two types, one is belt drive, and the
other is direct transmission. The direct drive system combines the motor power source with the
main body with a coupling, and then increases the speed of the main rotor through a set of high
Summary of Contents for Quan Wei
Page 1: ...TaiWan QuanWei Screw type air compressor Using and Maintenance Instructions ...
Page 12: ...8 ...
Page 81: ...77 ...
Page 82: ...78 8 2 2 QWL 15A 20A 8 2 3 QWL 30A 40A ...
Page 83: ...79 8 2 4 QWL 50A 60A ...
Page 84: ...80 8 2 5 QWL 75A 100A ...
Page 85: ...81 8 2 6 QWL 150A 175A ...
Page 86: ...82 9 0 Circuit diagram ...
Page 87: ...83 9 1 MAM 860 880 Circuit diagram 9 2 MAM 890 Circuit diagram ...
Page 88: ...84 9 3 MAM 6080 Circuit diagram ...
Page 89: ...85 Screw Air Compressor operation record tale ...