How to control the fuel injection volume of the screw air compressor?

 

The oil injected into the oil-injected screw air compressor is mainly used to take away the heat generated by the air during the compression process. The amount of oil injected directly affects the performance of the compressor. When the fuel injection quantity is insufficient, the exhaust gas temperature at the compressor outlet will rise, and the compressor bearing will vibrate; when the fuel injection quantity is large, too much fuel will accelerate the formation of carbon deposits in the air compressor; the fuel injection quantity It is controlled by the oil supply valve on the lubricating oil circuit, and the opening of the oil supply valve is usually 90%.

 

What is the volumetric efficiency, compression efficiency, and mechanical efficiency of a screw air compressor?

 

Volumetric efficiency is the ratio of the actual gas volume of the compressor to the theoretical gas volume, expressed as a percentage.

 

Compression efficiency is the ratio of the actual power required to compress a given amount of gas to the theoretical power. Theoretical power can be calculated according to isothermal or adiabatic conditions. The corresponding compression efficiency can be determined and expressed as a percentage. In the case of steam-driven or internal combustion engine-driven compressors, mechanical efficiency is the ratio of the indicated fractional horsepower of the compressor to the brake fractional horsepower at the shaft. In the case of motor-driven compressors, mechanical efficiency is the ratio of the indicated power in the compression cylinder to the shaft power of the compressor expressed as a percentage.

 

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