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Single Screw Pump Closed Screw Pump
Jun 15, 2017

Single Screw Pump Closed screw pump

Single-screw pump (single-screw pump; mono pump) is a rotor-type positive displacement pump, which is dependent on the screw and the bushing meshing in the suction chamber and discharge chamber to produce volume changes to transport the liquid. It is an internally closed, closed screw pump consisting of a bushing (stator) with a double-headed spiral cavity and a single-head screw (rotor) engaged with the stator cavity. When the input shaft drives the rotor around the stator center for the planetary rotation through the universal joint, the stator-rotor pair is continuously engaged to form a sealed chamber, and the volume of the sealed chamber is uniformly moved in a uniform direction, and the conveying medium is moved from the suction end - the rotor is conveyed to the extruded end, and the medium inhaled into the closed chamber flows through the stator without being disturbed and destroyed. Single screw pump Category: Integral stainless steel single screw pump, shaft stainless steel single screw pump.

Working principle editor

The screw has a single head thread, and its arbitrary cross section is a circle of radius R, the center of the section is located on the helix and is offset from the axis of the screw by an eccentricity e, rotated about the axis and moved in the axial direction

The number of heads of the screw is one more than the number of rotors of the rotor, T1 = T2 + 1. Their ratio becomes the ratio of the number of heads. Screw pumps can be divided into single heads (1: 2) and long (2: 3, 3: 4) and so on.

The greater the number of heads, the greater the output torque of the screw pump, the lower the speed. On the contrary, the output torque is smaller, the higher the speed.

The inner surface of the bushing has a double thread, and its cross section is a long circle, both ends are semicircle with radius R (equal to the radius of the screw), and the middle is 4e long. Any of the bushings of the bushings are the same long circles, but are offset from each other by an angle.

After the screw is inserted into the bushing, a closed chamber is formed between the screw surface and the inner thread surface of the bushing, and any cross section is divided into two crescent-shaped chambers (see Figure 1-3). When the screw is rotated, the volume of the first working chamber near the suction chamber is gradually increased to form a negative pressure, and the liquid is sucked into the working chamber under the pressure difference. As the screw continues to rotate, the working chamber volume continues to increase, the studio closed and the liquid is pushed axially out of the chamber. At the same time, the upper and lower working chambers alternately recirculate and drain the liquid, so that the liquid is continuously pushed from the suction chamber in the axial direction to the pressing chamber.

Use scope editing

The use of a very wide range, mainly used in: environmental protection, shipbuilding industry, petroleum industry, medicine, cosmetic, brewing industry, construction industry, mining industry, chemical industry, printing, paper industry.

Scope of application editing

Delivery of high viscosity media: Depending on the size of the pump, a medium with a viscosity of 0-200000 centipoise can be delivered.