Centrifugal pump and permanent magnet synchronous motor matching device and monitoring, regulating and controlling method thereof

Abstract

The invention provides a centrifugal pump and permanent magnet synchronous motor matching device and a monitoring, regulating and controlling method thereof. The centrifugal pump and permanent magnetsynchronous motor matching device comprises a centrifugal pump, a permanent magnet synchronous motor and a servo driver. An impeller is arranged in a pump cavity of a pump shell of the centrifugal pump, and a pump shaft fixedly penetrating the center of the impeller stretches out of the pump shell. The pump shell is provided with a water inlet and a water outlet, and the water outlet is sequentially connected with an oscilloscope and a pressure sensor in series. The signal output end of the pressure sensor is connected with the servo driver through a wire. A stator and a rotor are arranged ina motor shell of the permanent magnet synchronous motor. A motor shaft fixedly penetrating the center of the rotor stretches out of the motor shell. The motor shell is provided with a temperature detector and a rotation speed sensor, and the signal output end of the temperature detector and the signal output end of the rotation speed sensor are connected with the servo driver through wires. A torque sensor is arranged between the drive end of the motor shaft and the transmission end of the pump shaft, the signal output end of the torque sensor is connected with the servo driver through a wire,and the servo driver is connected with the permanent magnet synchronous motor through a frequency converter in an electric control manner.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a cooperation between a pump and a motor, in particular to a matching device of a centrifugal pump and a permanent magnet synchronous motor and a monitoring and controlling method thereof. Background technique [0002] Motors and centrifugal pumps complement each other, and jointly build a considerable foundation and market for traditional industries. Traditionally, centrifugal pumps have relatively less start-up frequency and relatively long continuous running time, so the requirements for the flexibility of the motor are relatively low. However, as the working environment of centrifugal pumps becomes more and more diverse, the uncontrollable factors of changing working conditions are gradually increasing. Maintaining the high-efficiency working state of centrifugal pumps and motors is not only the need for energy saving and emission reduction, but also the inevitable trend of t...

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Problems solved by technology

At this time, if the pump and motor are kept at high torque or high speed for a l...

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