WORKING PRINCIPAL

A usha make rotary Twin Lobe Compressors ( Roots Blower ) is a positive Displacement, constant volume machine which operates against varying pressure. Casing having two cylindrical bores accommodates two rotors having special profiles. They are driven by timing gears mounted on the shaft at non drive end. The special profile of the lobes in such that minimum specified clearence is always maintained between the rotors as well as rotor & casing, there by controlling the losses to the bare minimum. Hardened & Grounded tooth profiles of the gears having corrected backlash to maintain minimum clearance during the rotation of lobes and hence they do not touch each other hence no lubrication is required in the working chamber.

Effective sealing ensured by means of temperature insensitive labyrinth system as well as oil seals and ‘O’ rings keep the leakages to the bare minimum and we get positive displacement, constant volume characteristic with almost oil free compression.