Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Responsive to moving member developed fluid force – current...
Patent
1986-12-15
1988-09-13
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Responsive to moving member developed fluid force, current...
415 1, F01D 1700
Patent
active
047706023
ABSTRACT:
The invention relates to a capacity control method for controlling the capacity of a multistage compressor in response to a flow rate signal by varying the openings of vanes at individual stages. The relationships of the openings of the vanes of the individual stages are made to vary in response to the flow rate signal from the multistage compressor. Thus, when the flow rate of the multistage compressor is far from the anti-surge capacity within the operable range thereof, it is possible to select vane opening relationships which provide the highest efficiency for the multistage compressor. When the flow rate of the multistage compressor drops to either a value near the anti-surge capacity or the inoperable range, on the other hand, it is possible to select vane opening relationships which provide an enlargement of the operating range of the multistage compressor, before the flow rate enters that inoperable range.
REFERENCES:
patent: 3603695 (1971-09-01), Yokota
patent: 3723018 (1973-03-01), Uchiyama et al.
patent: 4288198 (1981-09-01), Hibino et al.
patent: 4303372 (1981-12-01), Caffrey
patent: 4431371 (1984-02-01), Thomson
Abe Yoshiaki
Kaneko Toshio
Miura Haruo
Ohmachi Hiroshi
Garrett Robert E.
Hitachi , Ltd.
Kwon John T.
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