Screw compressors

Screw compressor it is also called screw type air compressor.
A screw compressor consists of two rotors (concave and convex) rotating in relation to each other, which causes the air to be compressed in a spiral. There are bearings mounted at the ends of the rotors to keep the compressor running. There is a suction inlet and an outlet in the housing. Air enters the space between the rotors through the suction inlet. Its volume, when compressed by the rotors, increases, which means that it becomes compressed and exits through the outlet.

Screw compressors are divided into:

  • Oil compressors - oil is injected into the compression chamber. In oil compressors, oil performs three functions: lubrication, sealing and receiving heat generated at the point of compression. Compressors are difficult to heat up, which ensures continuous operation for several hours
  • Oil-free compressors - the rotors are made of a material with a low coefficient of friction. Water is used in the compression process. These devices do not produce harmful substances. These compressors are of low efficiency.