Operation Section
17
(4) Compressor lubrication
• The lubrication system is comprised of a
hollow shaft, an oil scraper mounted at the end
face, hollow shaft, a shaft journal (shaft
bearing), and the lubrication groove for the
shaft journal. The lubrication groove is wider
than the oil hole. 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 hole 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
copper tubes that are covered with thin
aluminum projections called plate fins.
• Heat is given off and absorbed by air being
pulled across the condenser fins by the
centrifugal fan and then expelled through the
exhaust air duct.
ILL00753-00
Oil Feed Groove
Oil Hole
Oil Scraper
Roller
Rotor
Cylinder
Hollow Shaft
Eccentric Shaft
I002351
