Centrifugal pumps are the core equipment in the fluid conveying system, and the actual efficiency of the current domestic centrifugal pumps is generally 5%~10% lower than the national standard efficiency A line, and the system operating efficiency is even lower by 10%~20%, which is a serious inefficiency. products, resulting in a great waste of energy. Under the current trend of "energy saving, emission reduction, low carbon and environmental protection", it is imminent to develop a high-quality, high-efficiency and energy-saving centrifugal pump, and the SLOWN type high-efficiency double suction has the advantages of large flow, high efficiency, wide high-efficiency area, stable and reliable operation, and convenient maintenance. The pump becomes the "boutique" among them.
Design principle and design method of SLOWN type high-efficiency double-suction pump
◇ Efficiency must meet the requirements of GB 19762-2007 "Energy Efficiency Limit Value and Energy Saving Evaluation Value of Clean Water Centrifugal Pump", and the NPSH must meet GB/T 13006-2013 "Centrifugal Pump, Mixed Flow Pump and Axial Flow Pump NPSH quantity".
◇ Design according to the principle of the best working conditions and the most reasonable energy consumption, requiring high efficiency at a single working point, a wide high-efficiency area, and good cavitation performance.
◇ Using the multi-condition variable parameter design method, and through the ternary flow theory and CFD flow field analysis, the overall optimization design is carried out, and the comprehensive operation efficiency of the system is high.
◇ According to the actual operating conditions, through the whole system diagnosis and analysis, tailor-made and reasonable configuration of high-efficiency and energy-saving pumps and optimization of system pipelines can greatly improve the operating efficiency of the system.
Technical advantages and characteristics of SLOWN type high-efficiency double-suction pump
◇ Introduce foreign advanced technology and cooperate with well-known domestic universities to carry out multi-condition parallel calculation and variable parameter unconventional design.
◇ Not only pay attention to the design of the impeller and the extrusion chamber, but also pay more attention to the design of the suction chamber, and at the same time improve the efficiency and anti-cavitation performance of the pump.
◇ While paying attention to the performance of the design point, pay attention to the performance of small flow and large flow, and reduce the flow loss under non-design conditions as much as possible.
◇ Carry out 3D modeling, and perform performance prediction and secondary optimization through ternary flow theory and CFD flow field analysis.
◇ Part of the impeller outlet is designed as an oblique outlet to form a dovetail converging flow, and the adjacent blades of some impellers are staggered to reduce the flow pulse and improve the running stability.
◇ The sealing ring structure of the lengthened double stop and sealing ring not only reduces the leakage loss of the gap, but also avoids the scouring phenomenon between the casing and the sealing ring to a large extent.
◇ Keep improving in production and manufacturing, and carry out strict process control and process treatment. The super-smooth, wear-resistant, wear-resistant and other polymer composite coatings can be coated on the overflow surface to further improve the smoothness of the flow channel surface.
◇ Adopt imported Bergman machine seal to ensure no leakage for 20,000 hours, and imported SKF and NSK bearings to ensure smooth operation for 50,000 hours.
SLOWN series high-efficiency double-suction pump performance display (excerpt)
Technical advantages and characteristics of SLOWN type high-efficiency double-suction pump
Take 0.6 times the design point flow as the small flow point, and take 1.2 times the design point flow as the large flow point; take the flow interval corresponding to the 5% drop in the design point efficiency value as the high-efficiency area; Comparative analysis of suction pump and ordinary double suction pump:
1. The design point efficiency is increased by more than 6%, the small flow efficiency is increased by 8%, and the large flow efficiency is increased by 7%.
2 The flow range of the high-efficiency area of the ordinary double-suction pump is 2490~4294m3/h, and the flow range of the high-efficiency area of the high-efficiency double-suction pump is 2350~4478m3/h, and the high-efficiency area is widened by 18%.
3 The benefits of replacing ordinary double-suction pumps with high-efficiency double-suction pumps (calculated based on the annual operating time of 330 days and the daily operating time of 24 hours, the electricity fee is 0.6 yuan/kWh, and the motor efficiency is 95%).
SLOWN type high-efficiency double-suction pump has been widely used in many fields and many energy-saving renovation projects, and has been widely praised! We will also continue to work hard to provide you with high-quality energy-efficient products. "Energy saving, emission reduction, low carbon and environmental protection" is our inescapable responsibility, "Let the sky always be blue, let the green return to nature" is the goal we are striving for!
Post time: Jun-14-2022