| 摘要 |
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. |
