Interpretation of Working Principle and Characteristics of Sewage Discharge Pump

Sewage pumps such as sewage pump impeller, pressurized water chamber, is the sewage pump two core elements. The advantages and disadvantages of its performance, also on behalf of the superior performance of the pump, sewage pump anti-clogging performance, efficiency and cavitation performance, by the leaf pump and pressurized water chamber to ensure that the two major components. Sewage Discharge Pump The working principle and characteristics of sewage pump is a non-clogging pump in a variety of forms: such as submersible and dry two, the most common type of submersible sewage pump WQ, the most common dry sewage Pumps such as W-type horizontal sewage pump and WL vertical sewage pump two. Mainly used to transport urban sewage, manure or liquid containing fiber. Such as solid particles of media, the temperature is usually the medium is not more than 80 ℃. Due to the media being conveyed contain easily entangled or bunched fibers. It is easy to block the pump runner, the pump will block the pump will not work, or even burn the motor, resulting in poor sewage. To urban life and environmental pollution have a serious impact. Therefore, an important factor in plugging resistance and reliability is the quality of the sewage pump. From the performance point of view, the sewage pump has a steep drop of the head curve, the power curve is flat. Sewage pump pressure chamber is the most common is the volute, built-in submersible pump and more use of radial guide vane or flow guide vane. Volute spiral, ring and intermediary three. Spiral volute is basically not used in the sewage pump. Ring pressure chamber due to simple structure manufacturing convenience in the small sewage pump used more. However, due to the intermediary type (semi-spiral) pressurized water chamber appears annular pressure water chamber application area becomes smaller. Due to the intermediary type pressurized water chamber and the helical high efficiency and high pressure circular chamber water permeability. Has been more and more manufacturers attention. Here are the types of sewage pump impeller: 1, the impeller structure type: the structure of the impeller is divided into four categories: leaf type (open, closed), swirl, runner type, (including single and double runner ) Spiral centrifugal four, open semi-open impeller manufacturing convenience, when the impeller caused by blockage, it can be very easy to clean and repair, but in the long run, under the erosion of the particles will make the blade and the pressure chamber inside The gap between the walls is increased, thereby reducing the efficiency. And the increase of clearance will destroy the pressure distribution on the blade. Not only produces a large amount of vortex loss, but also increases the axial force of the pump. At the same time, due to the increased clearance, the stability of the liquid state in the flow passage is destroyed, causing the pump to vibrate. This impeller is not easy to transport Large particles and long fiber media, from the performance point of view, the low efficiency of the impeller type, the highest efficiency of about 92% of ordinary closed impeller, lift curve is relatively flat. 2, rotating impeller: The use of this type of pump impeller, because some or all of the impeller shrinking pressure water chamber runner. So no blockage performance, particles and long fibers through the stronger. Particle flow in the water pressure chamber by impeller rotation of the vortex driven by the movement, suspended particle movement itself does not produce energy, flow channel and liquid exchange energy. In the process of flow, suspended particles or long fibers are not in contact with the worn blades, the blade is more wear and tear less, there is no increase in the gap due to abrasion, long-term operation will not cause serious problems of reduced efficiency, the use of This type of impeller pump is suitable for pumping medium containing large particles and long fibers. From the performance point of view, the impeller efficiency is low, equivalent to only about 70% of ordinary closed impeller, lift curve is relatively flat. 3, Spiral Centrifugal Impeller: This type of impeller blades for the twisted helical blades on the tapered hub body axially extending from the suction port. This type of impeller pump also has the role of volumetric pumps and centrifugal pumps, suspended particles flow in the leaves, do not hit any part of the pump, so good non-destructive. Destructive on the transport of small objects. Due to the helical propulsion and the high permeability of the suspended particles, pumps using this type of impeller are suitable for pumping media containing large particles and long fibers, as well as highly concentrated media. In the transport of media destruction has strict requirements of the occasion has obvious characteristics. 4, runner-style impeller: This type of impeller bladeless impeller, impeller runner is a from inlet to outlet of a curved runner. It is suitable for pumping medium containing large particles and long fibers. Good anti-blocking. From the performance point of view, the type of high efficiency impeller and ordinary closed impeller or less, but the type of impeller pump head curve is steep drop. The power curve is relatively stable, not easy to produce super power problems, but this type of impeller cavitation performance than ordinary closed impeller, especially suitable for pressure on the pump. 5, closed impeller: This type of impeller has a higher normal efficiency. In the long-term stable operation, the use of the type of impeller pump axial force is small, can be set in the front and rear cover blades. The auxiliary vanes on the front cover reduce vortex loss at the impeller inlet and wear of the seal ring by the particles. The auxiliary blades on the rear cover not only act to balance the axial forces but also prevent the suspended particles from entering the mechanical seal chamber to protect the mechanical seal. However, this impeller is poor in non-blocking and easy to wind, and is not suitable for pumping treated sewage media containing a large amount of particles (long fibers). In summary, no matter what type of sewage pump impeller, just different types of impeller and different types of pressurized water room according to the transmission medium and installation of a combination of requirements, as long as the impeller and pressurized water chamber can be optimized configuration. Various pump performance will be guaranteed. (Sewage pump working principle and characteristics)

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