vertical multistage submersible pumps

Leading the cutting-edge technologies of environmental protection and energy conservation, enabling the development concept of green and low-carbon     On the afternoon of December 28,2025, the China Machinery Industry Federation, at the invitation of Lanshen Group, presided over the appraisal meetings for scientific and technological achievements titled "Key Technologies of High-Efficiency Permanent Magnet Submersible Motors and Their Applications in Pumps and Stirrers" and "Physical and Chemical Properties of High-Efficiency Sedimentation Tanks and Field-Coupled Design Technology for Impellers with Integrated Complete Equipment". Ma Jingkun and Lu Lu, directors of the Science and Technology Work Department of the China Machinery Industry Federation, attended and presided over the appraisal meetings.   PART.01 Application of Key Technology of High Efficiency Permanent Magnet Submersible Motor in Pump and Mixer     Application of Key Technology of High Efficiency Permanent Magnet Submersible Motor in Pump and Mixer To address the challenges of low power factor, inefficiency, and bulky size in conventional motors for submersible pumps and mixers under China's "dual carbon" strategy, we have systematically developed high-efficiency permanent magnet submersible motors, achieving the following innovative outcomes: 1. The design method of alternating pole permanent magnet motor is proposed for the first time, which greatly improves the efficiency and power factor of the motor. 2. A coupling design method between hydraulic performance of water pumps and permanent magnet motors was established, achieving optimal matching of motor efficiency and hydraulic efficiency. The guide vane structure and well diameter of submersible pumps were optimized, reducing the guide vane diffusion angle and well diameter, thereby improving the unit efficiency. The new unit weight was reduced by approximately 20%. 3. Six permanent magnet motor models with different base numbers were developed, applied to submersible pumps and mixers in the 0.25-800kW range, effectively addressing the market's pressing demand for low-carbon and energy-efficient solutions. The series products have passed third-party testing and achieved national first-class energy efficiency, with the permanent magnet submersible motor receiving the first-class energy efficiency label from China Energy Efficiency Label Network. The project has been granted 7 invention patents and 27 utility model patents, and its core technologies possess independent intellectual property rights. The appraisal committee unanimously concluded that the key technologies of this achievement have reached internationally leading levels, and approved the scientific and technological achievement appraisal.   PART.02 Physical and Chemical Characteristics of High Efficiency Sedimentation Tank and Coupling Design Technology of Impeller and Turbine Field and Integrated Complete Equipment   Physical and Chemical Characteristics of High Efficiency Sedimentation Tank and Coupling Design Technology of Impeller and Turbine Field and Integrated Complete Equipment To address the critical demands for upgrading urban sewage treatment efficiency, deep purification of industrial wastewater, and water resource recycling in China, we have systematically researched key technologies including efficient flocculation internal flow characteristics, optimized design of coagulation stirring blades, and integrated systems. These efforts have yielded the following innovative outcomes: 1. Based on the solid-liquid two-phase flow model and the convection heat transfer model, the evaluation method of solid volume and flow channel temperature distribution is proposed, and the flow mechanism of coagulation and flocculation in different structure agitators is revealed. 2. The new step axial flow blade was developed, and the different blade combination and the optimal control strategy of the speed were put forward, which promoted the formation of the alumina flocculation and improved the efficiency of the sedimentation. 3. By adopting modular design principles, this system integrates core functions including coagulation, flocculation, sedimentation, and intelligent sludge discharge. The newly developed integrated high-efficiency sedimentation tank series achieves 30%-60% reduction in floor space, approximately 25% cost savings per unit, and a construction period reduction of at least 60%.       Third-party testing conducted by the National Environmental Protection Equipment Quality Inspection Center (Jiangsu) and other institutions confirmed that the project's core performance indicators meet the Grade A standards of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002) and comply with technical requirements for specific industrial wastewater treatment during the upgrade. The project has secured 3 invention patents and 6 utility model patents, with its core technologies being independently developed and protected by intellectual property rights.       The appraisal committee unanimously concluded that the achievement has attained internationally advanced standards overall, with its stepped axial flow blade design technology reaching world-leading levels, and approved the scientific and technological achievement appraisal.   PART.03   Future Work Planning and Prospects Both appraisal outcomes from Lanchen have now achieved industrialization, demonstrating broad market prospects and significant social benefits. The successful convening of this scientific achievement appraisal conference not only signifies international recognition of Lanchen Group's groundbreaking breakthroughs in "high-efficiency permanent magnet submersible motor applications for submersible pumps and submersible mixers" and "high-efficiency sedimentation tanks," but also serves as authoritative validation of our commitment to technological innovation and green development. This initiative has played a positive role in driving technological innovation and green empowerment within the industry.