PUMPING SYSTEM

摘要

To keep a discharge pressure or a discharge flow rate of a pumping system that jets a fluid from a nozzle selected from a plurality of nozzles a set value every selected nozzle. A pumping system that jets the fluid from the nozzle selected from the plurality of nozzles is provided with: a piston pump as a positive-displacement pump; a permanent-magnet type synchronous motor as a rotational speed variable drive unit; a turret device as selecting arrangement; a discharge pipe; the nozzle; a controller that controls the rotational speed of the drive unit; a storage that stores control parameters and a target value of the discharge pressure corresponding to each nozzle; and a pressure sensor, wherein the controller controls the rotational speed of the drive unit by feeding back the discharge pressure using the control parameters corresponding to the selected nozzle to match the discharge pressure with the target value.

主权项

1. A pumping system that pressurizes fluid and jets the fluid from a nozzle selected out of a plurality of nozzles, the pumping system comprising:
a positive-displacement pump provided with a discharge opening for discharging the fluid; a rotational speed variable drive unit that drives the positive-displacement pump; selecting arrangement provided with an inlet of the fluid and a plurality of outlets, the selecting arrangement providing communication between the inlet and any one of the plurality of outlets; a discharge pipe providing communication between the discharge opening and the inlet; the nozzle that communicates with the outlet; a controller that controls the rotational speed of the drive unit; a storage that stores control parameters used for the control of the rotational speed and a target value of a discharge characteristic which is a discharge pressure or a discharge flow rate of the positive-displacement pump corresponding to each of the plurality of nozzles; and a sensor which is provided to the discharge pipe, the sensor measuring the discharge characteristic of the positive-displacement pump, wherein the controller controls the rotational speed of the drive unit by feeding the discharge characteristic back using the control parameters corresponding to the nozzle selected by the selecting arrangement so as to match the discharge characteristic with the target value.