Method and apparatus for the continuous regulation of rotary hyd

Details Method and apparatus for the continuous regulation of rotary hyd Method and apparatus for the continuous regulation of rotary hyd

1978-11-22

1980-07-15

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 40, 417 42, 417 43, F04B 4900

Patent

active

042125901

ABSTRACT:
A regulator for controlling the speed of a rotary hydrodynamic pump algebraically sums a preselected value with a signal related to the pump speed and raised to a predetermined power. A root of the combined signals is compared with a flow rate or liquid level signal to develop a pump speed control signal. In the mechanical embodiments of the regulator, the algebraic summation is performed by the force of a spring against a fluid pressure, and the root of the resulting signal is obtained by means of an appropriately shaped cam. Electronically, the root signal is developed with an RC circuit.

REFERENCES:
patent: 3834830 (1974-09-01), Johncock
patent: 3930743 (1976-01-01), Stern
patent: 3935707 (1976-02-01), Murphy et al.

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