F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
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
Bandukwalla Phiroze
Kirtland Howard W.
Mount Gordon L.
Carrier Corporation
Gowling Lafleur Henderson Llp
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