Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Responsive to moving member developed fluid force – current...
Patent
1989-03-09
1990-07-03
Look, Edward K.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Responsive to moving member developed fluid force, current...
415 1, 415 17, F04D 2702
Patent
active
049386581
ABSTRACT:
A method for reliably operating turbocompressors in which flow and forwarding pressure defining the operating point of a compressor are continuously measured. At least one blow-off valve or blow-around valve is opened by a blow-off regulating system to prevent surging once the operating point of the compressor has attained a blow-off curve that parallels a surge limit, but before the operating point can attain the surge limit so that the flow will attain a minimum level depending on the forwarding pressure. The speed at which the operating point moves relative to the blow-off curve or surge limit is determined continuously to obtain the opening of either one of the valves ahead of time. The blow-off valve or blow-around valve is opened at maximum speed by a procedure that supercedes a normal blow-off regulation system when the operating point has arrived at or beyond a rapid valve-opening curve representing a speed-dependent minimum distance of the operating point from the blow-off curve. The motion in opening the valve is discontinued and regulation of the valve is resumed beginning with its latest state by the normal blow-off regulation system when the operating point has traveled back beyond the rapid valve-opening curve.
REFERENCES:
patent: 4781524 (1988-11-01), Blotenberg
patent: 4789298 (1988-12-01), Blotenberg
patent: 4796213 (1989-01-01), Blotenberg
patent: 4810163 (1989-03-01), Blotenberg
patent: 4831534 (1989-05-01), Blotenberg
patent: 4831535 (1989-05-01), Blotenberg
Fogiel Max
Kwon John T.
Look Edward K.
MAN Gutehoffnungshutte AG
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