Diffuser control

Details Diffuser control Diffuser control

1978-12-26

1980-08-26

Smith, Leonard E.

Rotary kinetic fluid motors or pumps

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

415 48, 415148, 415158, F04D 2702, F04D 2946

Patent

active

042193052

ABSTRACT:
A diffuser control for controlling vapor flow through a diffuser passage comprising an annular recess defined by a housing of the passage and in communication therewith, a diffuser control ring supported for movement within the annular recess and the diffuser passage between a full 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 control further comprises a first set of springs for urging the control ring toward the full throttling position, and a second set of springs for urging the control ring toward an intermediate throttling position located between the open and full throttling positions. The diffuser control also comprises a low pressure conduit for connecting the annular recess to a low pressure source, and a intermediate pressure conduit for connecting the annular recess to an intermediate pressure source. Valves are provided for regulating vapor flow through the low pressure and intermediate pressure conduits, and include a first position for maintaining a low pressure in the annular recess for maintaining the control ring in the open position, a second position for maintaining an intermediate pressure in the annular recess for maintaining the control ring in the intermediate throttling position, and a third position for maintaining a high pressure in the annular recess wherein the first set of springs maintains the control ring in the full 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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