Development trend of single-phase dry submersible electric pump

The single-phase dry submersible pump is a very versatile water treatment tool. The difference from ordinary water pumps is that they work underwater, while most water pumps work on the ground. Before starting the pump, the suction line and the pump must be filled with liquid. After the pump is turned on, the impeller rotates at a high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and is ejected outward. The ejected liquid gradually slows down in the diffusion chamber of the pump casing, and the pressure gradually increases. Outlet, the discharge pipe flows out. At this time, a vacuum low-pressure area with neither air nor liquid is formed at the center of the blade due to the liquid being thrown around. The liquid in the liquid pool flows into the pump through the suction pipe under the action of the atmospheric pressure on the pool surface, and the liquid is thus continuous. It is continuously sucked up from the liquid pool and continuously flows out of the discharge pipe. The motor is not much different from the ordinary squirrel-cage motor, but because the single-phase dry submersible pump works submerged in the water, it must be kept dry and not exposed to moisture or water. For this, good sealing measures are required.

Since the single-phase dry submersible electric pump itself and the pumping station using the single-phase dry submersible electric pump have many advantages, the demand in my country will continue to grow in the future, and there will be the following main development trends.

1. The development of single-phase dry submersible electric pump has the outstanding advantages of simplifying the pump structure and saving investment in pump station construction. Generally, it can reduce the cost by 40% to 60% and shorten the construction period by 1/2 to 2/3. Therefore, single-phase dry submersible electric pumps will be more and more widely used in municipal, industrial and mining, environmental protection and industrial and agricultural water supply and drainage. The demand is expected to be larger in the future.

2. The form of single-phase dry submersible electric pumps in my country is not enough compared with the products of foreign submersible electric pump manufacturers, such as pumps with cutting devices, multi-stage pumps, submersible electric pumps for pumping corrosive media, etc. There are still very few of them, but the market demand is very large. Therefore, the single-phase dry submersible electric pump has a good development prospect.

3. Develop high-reliability mechanical seals Mechanical seals are a key part of single-phase dry submersible electric pumps. Two single-end mechanical seals are used, so that the pressure of the medium can act on the end face, and the leakage direction is inward flow type, which is beneficial , but the structure is slightly more complicated. The double-end mechanical seal is installed in the oil chamber, and the end faces on both sides should adopt different structural types, so that the pressure of the medium can act on the end face on the lower side. Therefore, further research on structure and materials should be carried out to improve its reliability and life.

4. New materials, new technologies and new processes will be gradually applied to ordinary pumps. Stainless steel, fluoroplastic (F46), plastic-lined, rubber-lined, sprayed ceramics, etc. will be gradually applied. All these materials should be applied to single-phase dry submersible pumps as soon as possible. Expand the application field of single-phase dry submersible electric pump. The application of new technologies and new processes such as computer-aided design, aided manufacturing and aided testing is also imperative. Facts have proved that the application of new technologies, new materials and new processes not only liberates labor productivity, but also ensures stable and reliable product quality.

5. Pay attention to the appearance quality of single-phase dry submersible pumps and gradually enter the market. my country's single-phase dry submersible pumps have obvious price competitiveness in the market, but we must pay attention to improving single-phase dry submersible pumps. It is necessary to improve the appearance quality of single-phase dry submersible electric pumps, and give users a sense of beauty, so that domestic single-phase dry submersible electric pumps can enter the market as soon as possible.