Centrifugal vapor compressor and a diffuser control therefor

Details Centrifugal vapor compressor and a diffuser control therefor Centrifugal vapor compressor and a diffuser control therefor

F - Mech Eng,Light,Heat,Weapons

04

D

230/128

F04D 27/00 (2006.01) F01D 17/14 (2006.01)

Patent

CA 1119140

Centrifugal Vapor Compressor and a Diffuser Control Therefor Abstract A diffuser control for controlling vapor flow through a diffuser passage comprising an annular recess defined by a housing of the diffuser passage and in communication therewith, and an annular control ring supported for movement within the recess and the diffuser passage between a throttling position, wherein the control ring throttles vapor flow through the diffuser passage, and an open position for permitting a substantially free flow of vapor through the diffuser passage. The diffuser control further comprises a plurality of springs supported by the housing for urging the control ring toward the throttling position, a stop for limiting movement of the control ring at the throttling position, a low pressure conduit for connecting the annular recess to a low pressure source, and a seal for retarding vapor flow from a higher pressure side of the control ring to a lower pressure side thereof when the control ring is in the open position. A valve is provided for regulating vapor flow through the low pressure conduit and includes a first position for maintaining a low pressure in the annular recess and a pressure difference across the control ring for maintaining the control ring in the open position, and a second position for maintaining a high pressure in the annular recess wherein the springs maintain the control ring in the throttling position.

340937

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