Operation Section
22
(4) Compressor lubrication
• The lubrication system is comprised of a
hollow shaft, an oil scraper mounted at the
bottom end of a shaft journal (shaft bearing),
and the lubrication groove for the shaft journal.
The lubrication groove is wider than the oil
orifice. When the shaft turns, oil is scraped
upward by the oil scraper along the inside
diameter of the hollow shaft. The oil is fed
through the oil orifice by centrifugal force, then
supplied to the lubrication groove for each
shaft journal, lubricating the bearing. In this
lubrication system, oil enters into each bearing
separately and returns to the oil reservoir. This
system effectively prevents bearing
temperature increases, and offers high
reliability. In addition, the specially treated
shaft journal keeps the bearing from being damaged during high temperature operation.
4.3 Condenser
• The condenser is a heat exchanger with coaxial tubes. The inner tube is a copper tube in which the
water flows. The outer tube is a steel tube. The refrigerant flows between inner tube and outer tube.
• Heat is given off and absorbed by the water being passed through the condenser and then
expelled through the water outlet.
I003183
Oil Feed Groove
Oil Orifice
Oil Scraper
Piston
Rotor
Cylinder
Hollow Shaft
Eccentric Shaft
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