In a Progressive cavity pump, the driving and driven screws rotate in opposite directions. That is, when the driving screw rotates clockwise, the driven screw rotates counterclockwise, and vice versa. This opposite rotational direction relationship is determined by the operating principle of the progressive cavity pump.
A progressive cavity pump is a rotary pump that uses intermeshing screws to draw in and discharge liquid. Its rotor consists of a driving screw and a driven screw. These screws have a special thread design that allows them to mesh with each other and form sealed spaces. When the driving screw is rotated by the prime mover, the driven screw rotates in the opposite direction. Due to the intermeshing of the screws and the tight fit between the screw and the inner wall of the pump casing, these sealed spaces are continuously formed at the suction end of the pump, enclosing the liquid in the suction chamber. These sealed spaces then continuously move along the screw axis from the suction chamber to the discharge end, continuously discharging the liquid trapped in these spaces.
This opposite rotational direction relationship is crucial to the efficiency and performance of the progressive cavity pump. If the driving screw and the driven screw rotate in the same direction, they will not be able to form an effective sealing space and will not be able to push the liquid from the suction end to the discharge end. Therefore, in the design and operation of the screw pump, it is necessary to ensure that the driving screw and the driven screw rotate in opposite directions.
Copyright ? Jiangsu Longjie Pump Manufacturing Co., Ltd.
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