Electric Centrifugal Pump
Core Power and Working Principle
As the basic and main model in the centrifugal pump family, the electric centrifugal pump takes a high-efficiency motor as its core power source. Relying on a mature energy conversion mechanism, this electric centrifugal pump has become a universal conveying equipment in various fields. Its core working logic is that the motor drives the pump shaft to rotate at high speed, driving the impeller to generate centrifugal force, which flings the fluid from the center of the impeller to the edge to realize the conversion of kinetic energy and pressure energy. Then, the volute-shaped pump casing further increases the pressure before conveying the fluid to the target position.
Structural Design and Key Performance
In terms of structural design, it adopts an integrated transmission structure of "motor-pump shaft-impeller" with streamlined and highly compatible components. Equipped with a closed impeller (efficiency up to 70%-90%) and mechanical seal assembly, the electric centrifugal pump not only ensures conveying efficiency but also effectively prevents leakage.
The key performance parameters cover a wide range
|
Parameter Name (Symbol) |
Core Function |
Range |
|
Flow Rate (Q) |
Indicates the hourly sewage delivery capacity and determines sewage discharge efficiency |
1-1000m³/h (Small-sized: 1-50m³/h; Large-sized: 50-1000m³/h) |
|
Head (H) |
Determines the sewage lifting height and long-distance conveying capacity |
5-100m (Small-sized: 5-30m; Large-sized: 30-100m) |
|
Power (P) |
Motor driving power, directly affecting the upper limits of flow rate and head performance |
0.75-320kW |
|
Caliber (DN) |
Diameter of water inlet and outlet, which shall match the on-site sewage pipe size |
25-300mm |
|
Medium Temperature |
Adapts to sewage of different temperatures to avoid equipment damage |
Normal Temperature Type (≤40℃); High Temperature Type (≤100℃) |
|
Medium Concentration |
Refers to the solid particle content in sewage, affecting the pump's anti-clogging and wear resistance |
Solid Content ≤10%-30% |
|
Parameter Name (Symbol) |
Core Function |
Common Range/Description |
|
Flow Rate (Q) |
Volume of fluid delivered per unit time, reflecting the pump's delivery capacity |
Several L/min to thousands of m³/h; Common units: m³/h, L/min |
|
Head (H) |
Energy obtained per unit weight of fluid, reflecting the pump's ability to overcome resistance and lift fluid |
Single-stage ≤125m; Multi-stage up to thousands of meters (Unit: m water column) |
|
Rotational Speed (n) |
Impeller rotation speed, matched with the motor, directly affecting flow rate and head |
Common: 2900r/min, 1450r/min |
|
Efficiency (η) |
Ratio of effective power to shaft power, reflecting energy conversion efficiency |
Ordinary type: 90%-98%; Highest efficiency under design conditions |
|
Net Positive Suction Head (NPSH) |
Minimum suction pressure margin to prevent cavitation in the pump and protect the impeller |
Unit: m; Device margin must be greater than required margin |
|
Medium Adaptability |
Determines the material selection of pump body and components to ensure equipment durability |
Including temperature, viscosity, corrosiveness, solid content; Select materials as needed |
Core Advantages and Application Scenarios
The biggest advantage of this product is its high cost performance and convenient maintenance. It does not require complex auxiliary devices and can operate stably immediately after startup. The electric centrifugal pump is widely used in scenarios such as cooling water circulation in industrial production lines, agricultural field irrigation, and daily water supply of municipal pipe networks, where high requirements for conveying stability are required and the medium has no special corrosion.
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