Carrier Corporation

Jarso Mulugeta

Gordon L Mount

Vishnu Mohan Sishtla

Edward A Huenniger

Cornelius Holmes

Phiroze Bandukwalla

An improved transmission vent system for centrifugal compressors comprises a motor compartment, a transmission chamber, an impeller for moving refrigerant in a downstream direction, a guide vane located upstream of the impeller, and a vent pipe connected between the transmission chamber and an area upstream of the impeller and downstream of the guide vane. Refrigerant can be vented from transmission chamber to the area upstream of the impeller and downstream of the guide vane in order to eliminate the pressure differential between the transmission chamber and the compressor suction area upstream of the impeller during start-up.

Compressor transmission vent system

A centrifugal compressor having a variable wall diffuser section that is controlled in response to measured system parameters in order to maintain the compressor at optimum efficiency over extended operating range.

Control apparatus for centrifugal compressor

In a centrifugal gas compressor the capacity and the prewhirl of the entering gas are both controlled by reciprocating a plug which is located in the flow path. The plug coacts with tapering walls of the flow path to vary the minimum cross-sectional area of the flow path. Additionally vanes are provided either in the wall of the flow path or on the plug. The vanes transition from an axial direction to a helical direction and of reducing height in a downstream direction so as to produce increasing prewhirl with decreasing capacity. Alternatively, prewhirl may be provided without capacity control.

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East Syracuse, NY, United States of America

Jarso Mulugeta