Compressors

Details Compressors Compressors

1986-12-23

1988-05-10

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Cross flow runner

415206, 415DIG1, F04D 2942

Patent

active

047431610

ABSTRACT:
The disclosure illustrates a range improvement feature for a compressor wheel in which a chamber adjacent the inlet is separated from the outer periphery of the impeller wheel vanes by a wall through which communication is established between the chamber and the impeller wheel. Communication is provided by either an annular slot or a series of radial holes. The feature may be used on single stage or multistage compressors. The area of the communication is such that at high rpm, and/or high flow, flow is from the chamber inward and at lower flows the flow is from the impeller wheel outward. This bidirectional flow improves the range over which the compressor may operate without encountering surge.

REFERENCES:
patent: 2832292 (1958-04-01), Edwards
patent: 3217655 (1965-11-01), Sercy et al.
patent: 3462071 (1969-08-01), Garve
patent: 3730639 (1973-05-01), Moore et al.
patent: 3901620 (1975-08-01), Boyce
patent: 4248566 (1981-02-01), Chapman et al.
patent: 4479755 (1984-10-01), Skoe

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