Deep analysis of the principle of vacuum assisted self priming pump

Vacuum assisted selfpriming pump is a mechanical device that can absorb liquids and directly discharge them. Its working principle mainly uses the rotation of the impeller to generate centrifugal force, causing the liquid to form negative pressure inside the pump body, thereby achieving the purpose of water absorption.

The working process of vacuum assisted self priming pump can be divided into two stages: suction and drainage. In the suction stage, when the pump starts working, the impeller begins to rotate. Due to the high speed of the impeller, a low-pressure area is formed inside the pump body. This low-pressure area is connected to the suction port, causing the liquid at the suction port to be pushed into the pump body under atmospheric pressure, which is called self suction phenomenon.

In the drainage stage, the liquid is pushed by the impeller and flows along the flow channel of the pump body towards the outlet. At the same time, due to the centrifugal force generated by the rotation of the impeller, the speed and pressure of the liquid are increased. When the liquid reaches the outlet, its pressure is sufficient to overcome the resistance of the outlet pipeline, thus achieving the discharge of the liquid.

The advantage of a strong self-priming pump is that it can directly suck liquid without the need for additional water diversion equipment. Therefore, it is very convenient to use in places where liquid needs to be sucked, such as wells, ponds, etc. In addition, strong self-priming pumps can also handle liquids containing solid particles and fibers, because their internal flow channels are wide and not easily clogged.

However, strong self-priming pumps also have a drawback, which is that their self-priming ability is influenced by the properties of the liquid (such as viscosity, temperature, etc.) and factors such as the length and diameter of the suction pipeline. If these conditions are not suitable, it may affect the self-priming effect of the pump.