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Use and maintenance of gas compressor lubrication system

  The most common faults in gas compressors are abnormal wear and bite of pistons and piston rings, rotor components, sliding bearings, occlusion of crosshead sliders, and abnormal heating. These failures are directly or indirectly related to improper use of lubrication systems and lubrication devices. In addition to the maintenance personnel should learn to master the composition of the lubrication system and its components, performance structure, the use of general knowledge, but also should continue to accumulate experience in practice, strengthen the daily use and maintenance work to ensure that the compressor and Its lubrication system often maintain good operating conditions. In the daily inspection and regular maintenance should note the following points:

  (1) pay attention to keep lubricating oil clean dirty oil or deterioration of lubricants can cause a vicious cycle of accelerated wear parts, forced circulation lubrication system should pay attention to promptly replace and clean plug filter; Avoid oil in the tank or tank exposed to the air to prevent dust and dirt mixed into the oil on the pressure tank and the oil pool can generally be used to make air filter to communicate with the atmosphere; Samples should be sampled from the oil to test its composition, such as to meet or exceed the oil change indicators, should be all or part of the replacement and replacement of new oil. Usually every 3 months to six months (or work 2000-4000h) can be replaced once the new oil. Rotary compressor oil change indicator as shown, for reference.

Rotary compressor oil change oil standards


Oil change standards

Kinematic viscosity (40 ℃)

New oil viscosity of ± 10%

Total acid value / [mg (KOH) / g]

Greater than 0.5

Moisture (volume fraction) /%

Less than 0.1

Precipitation / (mg / 100 mL)

Greater than 20


Dramatic deepening

  (2) Should be regularly checked Cylinders, valves and exhaust pipes and other places should be regularly accumulated solid carbon particles and clay, once found to be promptly removed, or it may cause the cylinder combustion explosion, increased exhaust resistance, resulting in Abnormal fever.

  (3) should pay attention to the working condition of the compressor should pay attention to observe the working status of the compressor, periodically check the cylinder valve lubrication wear and tear, timely adjustment of the amount of oil, to prevent the occurrence of excessive oil and lubricating oil shortage. For forced circulation system, the lubrication pressure indication is too low or significantly decreased, often make the oil shortage, this time should be shut down for maintenance, spare parts and spare parts should be replaced if necessary.

  (4) pay attention to maintain the oil temperature in the lubrication system Oil tank or tank normal temperature of 40-50 ℃ is appropriate, the oil temperature is too high, the viscosity of the oil decreases, the oil easily oxidative deterioration, the oil temperature is too low, the viscosity Higher, worse liquidity, both of which can cause insufficient lubrication conditions. In addition to the oil temperature can be obtained from the thermometer (direct) observation instructions, from the cylinder cooling water or oil cooler cooling water temperature can be indirect response, the cooling water temperature is too high and too low will affect the lubricating oil Working temperature and viscosity of the oil.