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The lubrication method of the internal components of the screw chiller
Jun 30, 2022
Screw compressor chillers can be divided into air-cooled screw chillers and water-cooled screw chillers according to
different heat dissipation methods. According to different temperatures, it can
also be divided into low temperature screw chillers, and according to the
protection method, there are explosion-proof screw chillers. Explosion-proof
screw chillers are mainly used in the chemical industry. The core
components-compressors of these screw chillers are screw-type series of
well-known brands, such as: Taiwan Hanbell screw compressor, Germany Bitzer
screw compressor, the lubrication effect is very good, and the service life is over
20 years.
When the compressor lubrication system of
the screw chiller is better, it can reduce the friction force, friction heat
and wear of parts of the compressor, better improve the mechanical efficiency
of the compressor, and increase the reliability and working life of the compressor.
The compressor lubrication method of the screw chiller is divided into oil
lubrication and oil-free lubrication. At present, oil lubrication is still the
main method, and the dripping or splashing method is adopted, and the splashing
method is the most widely used in screw compressors. a form. In this
lubrication method, the air and the compressor oil are in close contact, which
can play a better role in the operation of the compressor of the chiller.
So, what is the lubrication method of the
refrigeration compressor of the screw chiller?
1. Splash lubrication: This method is
generally used for small open or semi-hermetic compressors. It uses the
crankshaft or accessories set on the crankshaft to contact the oil surface when
rotating, so that the lubricating oil splashes and the friction parts are
lubricated.
2. Centrifugal oil supply and lubrication:
This method is generally used in fully enclosed compressors with vertical
crankshaft installations. It uses the centrifugal force of the crankshaft to
tell the rotation to make the lubricating oil in the center of the crankshaft
move along the shaft to two directions under the action of centrifugal force.
Side and upper flow to lubricate the friction parts.
3. Mechanical oil pump oil supply and
lubrication: This method is generally used for medium and large compressors. It
uses mechanical oil pumps (commonly there are gear pumps, rotor pumps, crescent
pumps, etc.) to pump and press lubricating oil to each friction area.
The
lubricating oil (that is, refrigeration oil) used in the refrigeration
compressor of the screw chiller can enhance the sealing effect after filling
the gap with the cylinder and the friction surface of the shaft seal, and can
take away the wear debris and improve the friction surface. Working conditions,
ensure the normal operation of the compressor, and improve the working
efficiency of the entire chiller.