0:00 Rotors of Screw Compressor
0:30 Inlet and Outlet Ports of Screw Compressor
0:36 Compression Mechanism of Screw Compressor
A compressor is used to compress a fluid by doing work. A fluid is compressed in a compressor by reducing its volume. Depending upon the mechanism, compressors are classified as rotary compressors or reciprocatory compressor.
Rotary compressors include screw compressors, helical compressors etc which consist of two lobes which rotate and compress the fluid.
A screw compressor consists of two rotors: male and a female rotor. The rotors are driven by a pair of gears which is connected to a prime mover. The casing of screw compressor consists of inlet and outlet ports. Air enters into the cavity between the rotors through the inlet port. As the rotors rotate the cavity gets enclosed and the volume of enclosed cavity goes on reducing until the cavity is exposed to the outlet port.