CENTRIFUGAL COMPRESSOR Russian patent published in 2006 - IPC F04D29/51 F04D29/66 F04D29/42 

FIELD: manufacture of compressors.

SUBSTANCE: proposed centrifugal compressor is provided with gas bypass unit for bypassing gas from relief after-dummy piston cavity to its suction chamber. Compressor has housing with covers, shaft with impellers, dummy piston and gas duct communicating the suction chamber with after-dummy piston cavity. Cover of housing is provided with manifold on suction side; gas duct is brought to manifold. Exhaust section of gas duct is made in form of several passages connected with manifold; their outlet holes are located opposite suction hole inlet of first impeller. Proposed compressor improves interaction of gas flows being mixed in suction chamber at lesser degree of irregularity of velocity fields by disturbance of main gas flow at impeller inlet.

EFFECT: enhanced efficiency of bypassing gases at lesser volume losses; enhanced economical efficiency of compressor.

2 dwg