The function and principle of the drive coupling for a high-flow, low-cavitation multistage pump

Category: Water pump knowledge

2025-07-08

The drive coupling plays a role in connecting, transmitting power, absorbing deviations, and vibrations in high-flow, low-cavitation multi-stage pumps. Its working principle is based on the deformation and restoring force of elastic elements, ensuring stable system operation and extending service life. In practical applications, it is necessary to select a suitable drive coupling based on specific operating conditions and requirements to ensure the normal operation of the system.

I. The Role of the Drive Coupling

In high-flow, low-cavitation multi-stage pumps, the drive coupling plays a crucial role. Its main function is to effectively transmit the rotating power of the motor to the pump, enabling the pump to operate normally. In addition, the drive coupling can absorb minor deviations that may occur between the pump and motor to a certain extent, reducing vibration and noise, and improving the stability of system operation.

II. Principle of the Drive Coupling

The working principle of the drive coupling is based on the deformation and restoring force of elastic elements. When the motor starts, the power is transmitted to the multi-stage pump through the coupling. During this process, if there is a relative displacement or deviation between the pump and the motor, the elastic elements of the drive coupling will undergo elastic deformation, absorbing these deviations, and then eliminating these deviations through the restoring force, ensuring the continuity of power transmission.

In addition, the drive coupling also has a buffering effect, which can absorb some vibrations and impacts caused by liquid impact, pressure fluctuations, etc., reducing system vibration and noise. At the same time, it can adjust some of its parameters, such as elastic modulus and pre-tightening force, as needed to adapt to the needs of different operating conditions.

In high-flow, low-cavitation multi-stage pumps, because a large amount of liquid needs to be processed, and the flow of liquid is prone to cavitation, the selection and use of the drive coupling is particularly important. A suitable drive coupling can not only improve the operating efficiency of the system but also extend the service life of the system.

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