1, impeller structure type: the structure of the impeller is divided into four categories: blade (open, closed), swirl, runner, (including the single flow and dual flow) spiral centrifugal four, Semi-open impeller manufacturing convenience, when the impeller caused by plugging, it can be easily cleaned and maintenance, but in the long run, the erosion of the particles will make the blade and the pressure chamber side wall of the gap increases, so that efficiency reduce. And the increase in the gap will destroy the pressure distribution on the blade. Not only produce a lot of vortex loss, but also increase the axial force of the pump, at the same time, due to increased clearance, the stability of liquid flow in the flow channel is damaged, the pump vibration, the type impeller is not easy to transport Large particles and long fiber medium, from the performance point of view, the type of impeller efficiency is low, the maximum efficiency is about equivalent to about 92% of ordinary closed impeller, lift curve is relatively flat.
2, whirlpool impeller: the use of the impeller pump, impeller part or all of the compression chamber flow cavity. So no clogging performance, particle capacity and long fiber through the ability of strong. Particle flow in the pressurized water chamber by impeller rotation generated by the eddy current driven by the movement of suspended particles itself does not produce energy, but in the liquid and the exchange of energy within the channel. In the course of the flow, suspended particles or long fibers do not contact with the leaves, leaves more wear and less light, there is no gap due to increased wear and tear in the long run will not cause serious decline in efficiency, the use of the Type impeller pump suitable for pumping large particles and long fibers containing medium. From the performance point of view, the efficiency of the impeller is low, only about 70% of the ordinary closed impeller, lift curve is relatively flat.
3, closed impeller: the type of impeller normal high efficiency. And in the long run the situation is relatively stable, the use of the impeller pump axial force is small, and can be set on the front and rear cover vane. The vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. The secondary vane on the rear cover not only acts to balance the axial force, but also prevents the suspension particles from entering the mechanical seal chamber to protect the mechanical seal. However, the type of impeller is not blocking the poor, easy to winding, not suitable for pumping with large particles (long fibers) and other untreated sewage medium.
4, flow channel impeller: the impeller is a non-leaf impeller, the impeller is a flow channel from the inlet to the outlet of a curved flow channel. So it is suitable for pumping medium containing large particles and long fibers. Anti-blocking good. From the performance point of view, the type of impeller efficiency and general closed impeller little difference, but with the type of impeller pump head curve is steep drop. Power curve is relatively stable, not easy to produce super-power problem, but the type of impeller cavitation performance is not as good as ordinary closed impeller, especially suitable for use in the import of pressure pump.
5, spiral centrifugal impeller: This type of impeller blades for the twist of the spiral blade, in the cone wheel hub from the mouth along the axial extension. The impeller pump and the capacity of the pump and the role of centrifugal pump, suspended particles in the leaves flow through, do not impact any part of the pump, so the non-destructive good. And the destructiveness of the conveyed material is small. Due to the propulsive effect of the spiral, the suspended particles through the strong, so the pump impeller with the type suitable for pumping large particles and long fibers containing medium, and high concentrations of media. The destruction of the transmission medium there are stringent requirements of the occasion under the obvious characteristics.
2, whirlpool impeller: the use of the impeller pump, impeller part or all of the compression chamber flow cavity. So no clogging performance, particle capacity and long fiber through the ability of strong. Particle flow in the pressurized water chamber by impeller rotation generated by the eddy current driven by the movement of suspended particles itself does not produce energy, but in the liquid and the exchange of energy within the channel. In the course of the flow, suspended particles or long fibers do not contact with the leaves, leaves more wear and less light, there is no gap due to increased wear and tear in the long run will not cause serious decline in efficiency, the use of the Type impeller pump suitable for pumping large particles and long fibers containing medium. From the performance point of view, the efficiency of the impeller is low, only about 70% of the ordinary closed impeller, lift curve is relatively flat.
3, closed impeller: the type of impeller normal high efficiency. And in the long run the situation is relatively stable, the use of the impeller pump axial force is small, and can be set on the front and rear cover vane. The vane on the front cover can reduce the vortex loss of the impeller inlet and the wear of the seal ring. The secondary vane on the rear cover not only acts to balance the axial force, but also prevents the suspension particles from entering the mechanical seal chamber to protect the mechanical seal. However, the type of impeller is not blocking the poor, easy to winding, not suitable for pumping with large particles (long fibers) and other untreated sewage medium.
4, flow channel impeller: the impeller is a non-leaf impeller, the impeller is a flow channel from the inlet to the outlet of a curved flow channel. So it is suitable for pumping medium containing large particles and long fibers. Anti-blocking good. From the performance point of view, the type of impeller efficiency and general closed impeller little difference, but with the type of impeller pump head curve is steep drop. Power curve is relatively stable, not easy to produce super-power problem, but the type of impeller cavitation performance is not as good as ordinary closed impeller, especially suitable for use in the import of pressure pump.
5, spiral centrifugal impeller: This type of impeller blades for the twist of the spiral blade, in the cone wheel hub from the mouth along the axial extension. The impeller pump and the capacity of the pump and the role of centrifugal pump, suspended particles in the leaves flow through, do not impact any part of the pump, so the non-destructive good. And the destructiveness of the conveyed material is small. Due to the propulsive effect of the spiral, the suspended particles through the strong, so the pump impeller with the type suitable for pumping large particles and long fibers containing medium, and high concentrations of media. The destruction of the transmission medium there are stringent requirements of the occasion under the obvious characteristics.
Manufacturers recommend: Shenlong stainless steel fountain submersible pump
Keywords:Pump impeller, structure type, characteristic advantage
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