System for controlling operation of turbo type fluid machinery

Details System for controlling operation of turbo type fluid machinery System for controlling operation of turbo type fluid machinery

1996-08-02

1997-06-03

Thorpe, Timothy

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 34, 417 442, 417 53, F04B 4900

Patent

active

056347723

ABSTRACT:
A system for controlling the operation of a turbo-type fluid machine driven by a variable speed prime mover, which enables the characteristics of the fluid machine to be improved so as to become favorable for actual use while allowing the prime mover to exhibit its capacity to the maximum even at an operating point other than the rated point. The operation control system includes a turbo-type fluid machine driven by a driving machine, and a device for detecting an operating head or operating pressure of the fluid machine. The operation control system further includes a device for arithmetically outputting a rotational speed which gives a preset characteristic of the fluid machine in corresponding relation to the operating head or operating pressure, and a device for changing the rotational speed of the driving machine in response to the output rotational speed, so that even when the operating head or operating pressure of the fluid machine changes, the rotational speed of the fluid machine is controlled so as to maintain the preset characteristic of the fluid machine.

REFERENCES:
patent: 3832846 (1974-09-01), Leeson
patent: 3985467 (1976-10-01), Lefferson
patent: 4678404 (1987-07-01), Lorett et al.
patent: 5019757 (1991-05-01), Beifus
patent: 5159218 (1992-10-01), Murry et al.
patent: 5160244 (1992-11-01), Kuwabara et al.
patent: 5240380 (1993-08-01), Mabe

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