2
precision speed increasing gears. The belt drive type has no speed gear, and two pulleys made in
proportion to the speed of the belt drive the power through the belt.
1.2.2 Meshing
The main rotor is driven by coupling, gear or belt. Because the two rotors engage each other, the
main rotor directly drives the pair rotor to rotate together. The cooling lubricating oil is directly
injected into the meshing part between the rotors by the lower part of the compressor housing
through the nozzle and mixed with the air to take away the heat produced by the compression to
achieve the cooling effect. At the same time, oil film is formed to prevent the direct contact
between metal and metal between the rotor and the gap between the rotor and the housing. The
injected lubricating oil can also reduce the noise caused by high speed compression. Because of the
different exhaust pressure; the fuel injection weight is about 5-10 times the weight of the air.
1.3 Compression principle of Twin Screw Air Compressor
1.3.1 Intake process:
The suction port on the screw inlet side must be so designed that the compressing chamber can fully
inhale, while the screw compressor does not have an intake and exhaust valve set. The intake is only
regulated by the opening and closing of a regulating valve. When the rotor rotates, the tooth groove space of
the main and secondary rotor is the largest when it is turned to the inlet wall opening. At this time, the tooth
groove space of the rotor is connected with the free air of the inlet, because the air of the tooth groove is
completely discharged during the exhaust, and when the exhaust is finished, Tooth groove is in a vacuum
state, when turned to the air intake, the outside air is inhaled, along the axial flow into the main and
secondary rotor in the gutter. When the air fills the entire tooth groove, the inlet side of the rotor turns away
from the inlet of the shell, and the air between the teeth groove is closed. [Intake process]
(
see figure 1
)
1.3.2 Sealing and conveying process:
When the main and secondary rotors are inhale, the teeth summit of the principal and deputy rotors and
the shell are closed, and the air is closed in the teeth groove no longer, that is, [the sealing process]. When
the two rotors continue to rotate, the tooth peak and the tooth groove coincide at the Intake end, and the
anatomists surface moves gradually to the exhaust end, which is the conveying process. [Conveying
process](See figure 2)
1.3.3 Compression and injection process:
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 ...