Progressive cavity pump

Physics

Impeller

Mathematics

Mechanics

Reciprocating pump

Volute

Gas compressor

Engineering

Reciprocating motion

Centrifugal pump

Volumetric flow rate

Materials science

Rotodynamic pump

Geometry

Flow (mathematics)

Rotational speed

Variable displacement pump

Rotation (mathematics)

Mechanical engineering

Frontiers in Energy Research

In order to discuss the surface pressure pulsation characteristics of the magnetic-fluid sealing membrane of centrifugal pump, this paper studies the surface pressure pulsation characteristics of the shaft end sealing membrane under different flow operating conditions of centrifugal pump based on the combination of numerical calculation and experimental verification. The results show that the pressure value on the surface of the magnetic-fluid sealing film decreases with the increase of the flow rate of the centrifugal pump, and the pressure on the surface of the magnetic-fluid sealing film has periodic pulsation, and the period is the time required for a single blade to sweep the volute separating tongue. In one rotation cycle of the runner, the number of reciprocating movements of the magnetic-hydraulic sealing film is the same as the number of blades of the runner. The main reason for the pressure pulsation is that the impeller periodically sweeps the fixed surface of the centrifugal pump.

Analysis of Surface Pressure Pulsation Characteristics of Centrifugal Pump Magnetic Liquid Sealing Film