Hydraulic safety protection device will automatically stop when lack of oil , protect the compressor from damage. No oil sight glass and oil pressure safety device closed compressor ( including rotor and scroll compressors ) and air-cooled compressor , starvation no obvious symptoms , it will not stop, the opportunity to wear compression unknowingly damaged . Compressor noise, vibration or excessive current , which may be related to lack of oil on the compressor and accurately determine the health of the system is very important . Ambient temperature is too low may cause some failure of the hydraulic safety device will cause the compressor wear.

 

General wear and tear caused by lack of oil compressor uniform . If little or no lubricant oil, bearing friction surface will be severe , rapid temperature rise within a few seconds . If the power of the motor is large enough , will continue to rotate the crankshaft , the crankshaft and the bearing surface is worn or scratched, otherwise locking the crankshaft bearings will be stopped rotating. Reciprocation of the piston within the cylinder is the same , in oil causes wear or scratch card severe piston in the cylinder will not move .

 

3 . Insufficient lubrication

 

Wear is the direct cause insufficient lubrication . Lack of oil will certainly lead to insufficient lubrication , but not necessarily less oily starvation caused . The following three reasons can also cause insufficient lubrication : oil can not reach the bearing surface ; Although oil reaches the bearing surface , but the viscosity is too small to form a film of sufficient thickness ; Although oil reaches the bearing surface , but due to overheating decomposition out, can not play lubrication.

 

Net or oil suction pipe blockage , lubricating oil pump failure , etc. will affect the transport of oil away from the pump can not reach the friction surface . Net and pump suction normal, but bearing wear , the gap is too large , etc., causing oil spills and oil pressure is too low , will not be far away from the friction surface of the oil pump , causing wear and scratches.

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