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

Category: Water pump knowledge

2025-06-04

The drive coupling of a high-flow, high-head multi-stage pump is a crucial component connecting the motor and the pump. Its main function is to smoothly transmit the rotational power from the motor to the pump through elastic elements and friction surfaces, and to absorb possible deviations and stresses during equipment operation. Its working principle is based on elastic and friction characteristics, achieving efficient and reliable transmission through a series of complex structures and devices. During use, attention should be paid to maintaining and checking the condition of the drive coupling to ensure its normal operation and the stable running of the entire system.

I. Function of the Drive Coupling

In high-flow, high-head multi-stage pumps, the drive coupling plays a crucial role. Its main function is to effectively transmit the motor's rotational power to the pump, ensuring the pump operates normally. Additionally, the drive coupling can, to some extent, absorb slight axial movements and angular deviations that may occur between the pump and the motor, thereby protecting both the pump and the motor.

II. Principle of the Drive Coupling

The working principle of the drive coupling is based on the elastic properties of elastic elements and the friction characteristics of friction surfaces. When the motor starts, torque is transmitted through the elastic elements of the drive coupling, causing the pump to begin rotating. During normal operation, the drive coupling smoothly transmits the motor's power to the pump through the friction force between the friction surfaces. Simultaneously, due to its inherent elasticity, the drive coupling can absorb stresses caused by potential deviations between the pump and the motor, thereby preventing equipment damage.

Specifically, the drive coupling of a high-flow, high-head multi-stage pump typically consists of two main parts: a drive end connected to the motor and a driven end connected to the pump. These two ends are connected by a series of elastic and friction elements to achieve smooth power transmission. Additionally, the drive coupling may include other auxiliary components, such as safety devices and adjustment mechanisms, to enhance its performance and reliability.

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