Difference between electric pump and centrifugal pump

Electric pump: Classification by driving mode
Definition: Any type of pump whose driving source is an electric motor. The electric motor converts electrical energy into mechanical energy to drive the operation of the pump.

Core feature: The driving force comes from electricity (electric motor).

Coverage: Very wide. As long as it is a pump driven by an electric motor, regardless of its internal working principle, it can be called an electric pump. This includes centrifugal pumps, gear pumps, screw pumps, plunger pumps, diaphragm pumps, etc.

Advantages: Easy to control (start and stop, speed regulation), clean (no exhaust), high efficiency (in the high efficiency area), relatively simple maintenance (compared to internal combustion engines), suitable for fixed or movable occasions but requiring power supply.

Centrifugal pump: Classification by working principle
Definition: Refers to a pump that uses a rotating impeller to generate centrifugal force to transport liquid. The impeller rotates at high speed, allowing the liquid to gain kinetic energy and speed, and then converts the kinetic energy into pressure energy (pressure head) through the volute or guide vane.

Core feature: The working core is centrifugal force.

Drive mode: The centrifugal pump itself only describes the working principle, not the drive mode. It can be driven by an electric motor (in which case it is also an electric pump), or by a diesel engine, gasoline engine, steam turbine, or even other power sources such as wind power and water power.

 

Advantages: Relatively simple structure, large and uniform flow, smooth operation, easy maintenance, suitable for conveying low-viscosity, relatively clean liquids (water, chemical solutions, etc.), and can be directly connected to a high-speed prime mover (such as an electric motor).

 

Key points:
It is not either-or: They are not opposing concepts. A pump can be both an electric pump and a centrifugal pump (for example: a household water pump, a cooling circulation pump). In fact, the vast majority of centrifugal pumps used in industrial sites are driven by electric motors, so they are both centrifugal pumps and electric pumps.