Carrier Corporation

Pcc Structurals, Inc.

James R Barrett

Vishnu Mohan Sishtla

Thomas M Zinsmeyer

David H Sturgis

Mehrdad Yasrebi

Douglas Gene Nikolas

Mark E Springgate

A vaned diffuser for a centrifugal compressor has provision for selectively adjusting the pitch of the vanes in order to accommodate variable load conditions. Each of the vanes is rotatable about a pivot pin near its leading edge and is engaged with an actuation member near its trailing edge. The actuation members are attached to a common ring which can be selectively rotated to move to the vanes in unison. The ring is supported by rollers at its outer periphery and is positioned at the outer periphery of a diffuser wall such that there is no forward facing step projecting into the flow stream.

Rotating vane diffuser for a centrifugal compressor

Sound absorptive fiberglass pads within a silencer device for a centrifugal compressor are precompressed while installing the device in a containing frame mounted in the discharge pipe by a process including the steps of establishing the transverse dimension of the frame as a function of the transverse thickness of the device, precompressing one end of the device to a thickness which allows its insertion into the frame, and then forcing the entire device into the cavity in a wedgelike manner to thereby precompress the entire device, to thereby precompress the absorptive pad to a desired degree for purposes of erosion prevention.

Method of precompressing a silencer for a centrifugal compressor

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Sheds, NY, United States of America

James R Barrett