Structure Of Compressor - mycom 1612LSC series Instruction Manual

2202L5JE-DA-C5-N_2015.05.
2 Compressor Specifications and Structure
2.4

Structure of Compressor

 For the names and locations of the compressor components, refer to Section 7.1 "Development
Views, Assembly Sectional Views" and Section 7.2 "Parts Configuration Table" in this manual.
Figure 2-2 1612LSC Speed Increaser Type Sectional View
The 162LSC screw compressor consists of the following four main blocks: the shaft seal block which
prevents leakage of the refrigerant gas and lubricating oil from the compressor's axis; the speed
increaser gear casing assembly which houses the drive and driven gears for increasing the rotating
speed of the electric motor's output shaft; the low-stage compressor block which pressurizes
(pre-compresses) the gaseous working fluid coming from the freezing storage system; and the
high-stage compressor block which further compresses the working fluid gas pressurized by the
low-stage compressor before discharging it into the freezing storage system.
Like with the 1612**C Series direct drive type screw compressors, the 1612LSC speed increaser type
screw compressors has the capacity control (unloading) mechanism which works for reducing the
machine load at the time of the start of operation and keeping constant the load which would otherwise
vary during operation of the freezing storage system.
Inside each of the low-stage and high-stage compressor casings, there is a pair of screw rotors
meshing each other and supported by bearings at both ends. One of each pair is the male rotor having
four convex-shaped screw lobes and the other is the female rotor having six concave-shaped screw
lobes. In combination, they perform the work of compressing the refrigerant gas through the process
described in the next section.
Compound 2-stage Screw Compressor 2.4 Structure of Compressor
1612LSC Speed Increaser Type
2-5