How Does A Sewage Pump Work?

The working principle of a sewage pump is to transport sewage from one place to another, usually lifting it from low to high for discharge or further treatment. The main function of a sewage pump is to transport and lift liquids through the conversion of mechanical energy. The following are the basic working principles and processes of sewage pumps:

1. Inlet and suction

Wastewater enters the pump body through the suction port. The impeller or rotor of the pump rotates at high speed under the drive of the electric motor, generating negative pressure and promoting the suction of sewage into the pump body.

2. Impeller function

The impeller is the core component of a sewage pump. With the high-speed rotation of the impeller, the sewage is subjected to centrifugal force and thrown towards the periphery of the pump casing. The impeller converts mechanical energy into kinetic energy and pressure energy, thereby driving the flow of sewage.

3. Boosting and exhaust

The sewage thrown out by the impeller enters the flow channel (volute) of the pump body, where kinetic energy is further converted into pressure energy. The sewage is discharged from the pump body under high pressure and flows towards the place where it needs to be transported through the outlet.

4. Anti blocking and cutting (for certain types of sewage pumps)

Some sewage pumps (such as unobstructed pumps and cutting pumps) are equipped with specially designed impellers or cutting blades, which can treat sewage containing solid particles and fiber materials to prevent blockages.

5. Control and startup

The start and stop of sewage pumps can be achieved through manual or automatic control systems. Automatic control systems usually automatically control the start and stop of pumps based on signals from liquid level sensors to maintain the liquid level within the set range.

6. Sealing and cooling

In order to prevent sewage leakage and motor damage, sewage pumps are equipped with sealing devices, commonly mechanical seals. The motor part usually needs to be maintained at an appropriate temperature through external cooling devices or self cooling systems.

7. Motor drive

Sewage pumps are usually driven by electric motors. The electric motor drives the impeller to rotate through the transmission shaft, and energy is transmitted from the electric motor to the impeller through the transmission shaft.

Sewage pumps lift sewage from low to high through these steps, or transport it from collection wells, sewage tanks to sewage treatment plants, drainage networks, etc. Different types of sewage pumps may have different designs and functions, but their basic working principles are roughly the same.