Patent ID: 7530798
Filing Date: 2009-05-12
Classification: F04B,F04C

Abstract:
1. A multistage compressor for compressing gases, comprising: a low-pressure range connected by a gas duct; and a high-pressure range, the high-pressure range including at least one reciprocating compressor driven via a crankshaft, the low-pressure range including at least one low-pressure compressor comprising a rotating displacer coupled to the crankshaft of the reciprocating compressor, wherein at least one screw compressor is provided as the low-pressure compressor, and a cooling device and a condensate separator are provided in the gas duct between the reciprocating compressor and the screw compressor, the screw compressor being arranged on a reciprocating compressor side facing away from a drive unit of the multistage compressor, and wherein the displacer of the screw compressor is directly coupled to the crankshaft of the reciprocating compressor such that the screw compressor is directly driven by the crankshaft of the reciprocating compressor.