Differences Arising from Structural Characteristics of Single Screw Pumps (Test Information)
2026-02-11
A single screw pump is a type of positive displacement pump with a single helical rotor. Its main working components are an eccentric helical screw (referred to as the rotor) and a screw bushing with a double-start helical inner surface (referred to as the stator). The operating principle is as follows: when the motor drives the pump shaft to rotate, the screw spins around its own axis while rolling along the inner surface of the bushing, forming sealed chambers inside the pump.
During operation, each full rotation of the screw advances the liquid in the sealed chambers by one pitch. With continuous rotation, the liquid is pushed spirally from one sealed chamber to the next and finally discharged out of the pump body, achieving liquid delivery.
Compared with other types of rotary pumps, the single screw pump is less sensitive to entrained gas and solid contaminants. It can handle a wide variety of liquids across a broad viscosity range. Thanks to the low inertia force of its rotating parts, it can operate at high rotational speeds. It features excellent suction performance and self-priming capability, with uniform and continuous flow, low vibration and low noise. Highly versatile, it can convey almost all flowing media and even non-flowing materials. The pump has a robust structure and is simple and convenient to install and maintain.
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Differences Arising from Structural Characteristics of Single Screw Pumps (Test Information)
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