Diffuser control

Details Diffuser control Diffuser control

1978-12-26

1981-03-24

Smith, Leonard E.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

415150, 415158, F04D 2700

Patent

active

042577330

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 restriction means 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.

REFERENCES:
patent: 916427 (1909-03-01), Fee
patent: 2957424 (1960-10-01), Brundage
patent: 3032259 (1962-05-01), Jassniker
patent: 3251539 (1966-05-01), Wolfe et al.
patent: 3289919 (1966-12-01), Wood
patent: 3362624 (1968-01-01), Endress
patent: 3362625 (1968-01-01), Endress
patent: 3365120 (1968-01-01), Jassniker
patent: 3399625 (1968-09-01), Skinner
patent: 3619078 (1971-11-01), Mount et al.
patent: 3667860 (1972-06-01), Endress et al.
patent: 4070132 (1978-01-01), Lynch

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