The Impeller Form Of Sewage Pump Is Introduced

The sewage pump has two core components: impeller and pressurized water chamber. Different sewage pumps have different impeller types, such as single-channel impeller, double-channel impeller, double-blade impeller and bladeless impeller. Before the submersible pump works, it is necessary to inject liquid into the suction tube and pump housing. The working principle is similar to the ordinary vane pump. The impeller rotates at high speed, and the liquid in the pump is driven by the blade. Under the action of centrifugal force, the liquid will fly away from the impeller, into the diffusion chamber of the pump shell, the pressure gradually increases, and finally discharged from the outlet of the pump under the action of pressure. In the center of the blade, a low pressure area is formed due to the reduction of liquid, and the fluid outside the pump will be continuously supplemented into the pump under the action of atmospheric pressure, thus forming a continuous flow.

By improving the two-blade impeller, the sewage pump's ability to pass through solid particles can be maximized. When designing a two-blade impeller, the shape of the flow passage between the blades is usually not restricted in advance, but when the minimum cross-section shape is close to the square, the cross-sectional area of the flow passage should be increased as much as possible. In the design of the flow passage of the blade, it is necessary to consider the liquid flow related to the hydraulic efficiency of the impeller. However, the two-channel impeller limits the channel shape between the blades, which is designed based on the given channel shape between the blades. Through comparison, it is found that the flow passage between the two blade blades is diffusion type, so its minimum cross section is at the blade inlet, while the flow passage between the two blade blades shrinks, and its minimum cross section is at the blade outlet.