The three-screw pump is formed by the pump body and the screw. When the active screw rotates, the driven screw that is meshed with it rotates, and the volume of the screw engaging space at the end of the suction cavity gradually increases, and the pressure decreases.
The liquid enters the meshing space volume under pressure differential. When the volume is increased to a maximum to form a sealed chamber, the liquid is continuously moved axially in one sealed chamber until one end of the chamber is exhausted. At this time, the volume of the screw engagement space at one end of the discharge chamber is gradually reduced, and the liquid is discharged. The working principle of the three-screw pump is similar to the gear pump except that the gear is replaced with a screw in the structure. The table shows the characteristics and applications of various screw pumps. The three-screw pump has small flow and pressure pulses, little noise and vibration, and self-priming capability, but screw machining is difficult. The pump has two types of single suction and double suction, but the single screw pump has only one suction type. The triple screw pump must be equipped with a safety valve (a single screw pump does not have to be equipped) to prevent the pump or the prime mover from being damaged due to some cause, such as the discharge pipe clogging, causing the outlet pressure of the pump to exceed the allowable value.
Rod pump structure
The three-screw pump uses the rotation of the screw to suck and discharge the liquid. The middle screw is the active screw, which is driven by the prime mover. The screw on both sides is the driven screw and rotates in reverse with the active screw. The threads of the main and follower screws are double-ended threads.
The triple screw pump is a screw type positive displacement pump. In the three-screw pump, due to the mutual engagement of the spiral grooves on the main screw and the driven screw and their cooperation with the inner surfaces of the three holes of the bushing, several dynamic seal chambers can be formed between the inlet and the outlet of the pump. The chamber will continue to move the liquid axially from the pump inlet to the pump outlet and step up the delivered liquid. This creates a continuous, smooth, axially moving pressure fluid. The liquid delivered by the three-screw pump is a lubricity liquid free of solid particles, non-corrosive oils, and the like. The viscosity is 1.2 to 100oE (3.0 to 760 cst). The high-viscosity liquid can also be transported by heating and viscosity reduction, and its temperature Not more than 150oC.
德国凯森进口三螺杆泵以下 特征 法兰等形式，满足各种管道要求。