LG RCWW-1, Руководство по эксплуатации и техническому обслуживанию

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Chiller Water-cooled Screw
As shown below, the gear of the rotor moves from the suction to discharge side as the rotor rotates. The corre-
sponding rotor wraps the compression space and continuously reduces the volume as it moves in axis direc-
tion. Due to this, the lobe space is formed between the male and female lobe. This lobe space increases to
maximum size (Suction and seal process). As the rotor rotates, the lobe space of V shape is closed by the new
locking from the suction side. The lobe space will continue to shrink as the lobe process (Compression process)
progresses.
The reduction in lobe space occurs at the bottom side of the rotor from the discharge aspect. Volume will gradu-
ally be reduced and will be compressed in sealed condition. The peak of the gear of the rotor will be loosened
with the discharge port simultaneously and the suction gas will be discharged to the high pressure side as the
lubrication oil of the discharged gas will be separated in the oil separator. The size and shape of the discharge
port is decided by the “Internal compression ratio (Vi)” of the compressor. This ratio must have the relationship
defined by the operating pressure ratio to avoid the efficiency loss from high or low pressure axis.
Table 13
No. Description No. Description
1 Compressor case 18 Bearing fixation ring
2 Motor case 19 Disk spring
3 Oil separator 20 Bearing lock nut
4 Motor rotor assembly 21 Water rotor
5 Motor stator assembly 22 Suction bearing
6 Motor rotor washer 23 Internal/External spacer ring of suction bearing
7 Motor rotor spacer ring 24 Oil induction ring
8 Oil separator divider 25 Suction filter
9 Oil separator cartridge 26 Oil heater
10 Piston 27 Refrigerator lubrication oil
11 Piston spring 28 Suction flange
12 Piston rod 29 Discharge flange
13 Bearing cover plate 30 Cable box
14 Capacity control solenoid valve 31 Power bolt
15 Slide valve 32 Thermostat terminal
16 Slide valve key 33 Motor cable cover plate
17 Discharge bearing 34 Check valve