Pump specific speed and pump impeller shape and performance of the relationship list

In this paper, the relationship between pump specific speed and pump impeller shape and performance is introduced in detail. Centrifugal pumps, mixed flow pumps and axial flow pumps are compared in detail. The specific rotation speed, impeller shape, size ratio, blade shape (Such as cylindrical vanes, cylindrical, twisted vanes at the entrance to the outlet, axial-flow pump wings, etc.), shape of the performance curve, characteristics of the flow-lift curve, characteristics of the flow-power curve, characteristics of the flow rate-efficiency curve Elaborated in detail. Pump Type Centrifugal Pump Francis Pump Axial Pump Low Specific Speed ​​Medium Specific Speed ​​High Specific Speed ​​Ratio Speed ​​ns 30 <ns <80 80 <ns <150 150 <ns <300 300 <ns <500 500 <ns <1000 Size Ratio D2 / D0 ≈3 ≈2.3 ≈1.8 ~ 1.4 ≈ .gunsq1 li {display: block; float: left; width: 200px; overflow: hidden; Pump 【purchase】 motor 【purchase】 booster pump 【purchase】 chemical pump 【purchase】 vertical multi-stage pump 【purchase】 carbon steel electrode 【purchase】 screw pump Previous: pump impeller outside the maximum allowable cut A: The pump base size and location of the allowable deviation var cpro_id = "u2852961"; Special recommended resistance Chi single screw pump advantages and main purposes High-quality piston pump business "beachhead battle" Shanghai Shenfu Li plastic industry new benchmark valve market Analysis: the valve market turnover of up to 150 billion yuan 2018 Xiamen International Vending Machine and self-service products Exhibition Venue - Time-related articles Product Guide Technical Interpretation Media Focus Exhibition Information Valve Market Analysis: Valve Market Amounting to 150 billion yuan 2018 Xiamen International Vending Machine and Self-service Products Exhibition Venue - Organizing Time · Valve Market Analysis: Valve Market Turnover Up to 150 Billion Yuan · 2018 Xiamen International Vending Machine and Self-Service Products Exhibition Venue - Organized Time · 2018 Xiamen Smart Retail Terminal Conference Venue - Time - Register Contact - Exhibitor Fee · About Asia Fluid Network 2018 Spring Festival Holiday Notice · Olsen Pump Industry - The National Brand of China's Industrial Pumps: Large Diameter Diesel Engine Self-suction Sewage Pump Technology To fill gaps in the domestic · Olsen pump through the audit of Sinopec factory audit, the official became the long axis of the pump and other material procurement suppliers · 2018 Kunming Beauty Expo Registration Contact - Location - Time 2018 Kunming Beauty Expo venue - Time - Registration Contact Ways - Participation Fee 2018 Wuhan US Fair Registration Contact - Location - 2018 Wuhan US Fair where the time? 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Chengdu to speed up the construction of the exhibition eco-circle and strive to form a multi-billion industry in 2020 Xinhua News Agency published an interview with the executive director of the China Pavilion Astana EXPO Yao Rui Interview Media Focus Exhibition Information Product Guide National Environmental Chemistry Metrology Technical Committee released "Mining Hydrogen sulfide gas detector, "the test procedures for micro-plastic pollution control breakthrough draft advice artificial intelligence nano-machine implantation will likely lead to a wave of unemployment · Yichang City, issued in 2017 soil pollution prevention and control work points · Ministry optimistic about the prospects of environmental protection equipment industry is expected to 2020 The output value will reach trillion · 34 provinces in 8 provinces set off the autumn and winter of 2017 "Blue Sky Battle" · National Environmental Chemistry Metrology Technical Committee released the "mining hydrogen sulfide gas detector" verification requirements Draft · Shandong want to vote 5.3 billion construction 353 Hazardous waste disposal project · breakthrough in micro-plastic pollution control · Development and Reform Commission for non-residents of urban water out of new regulations · the State Council promulgated the "Notice on the Third National Land Survey" · artificial intelligence nano-machine implantation will likely lead to a wave of unemployment · New hydraulic pump can work at 1400 ℃ will be used for solar hair · Stanford recently successfully developed ultra-cheap batteries instead of lithium-ion batteries · Jiangxi introduced measures to control the whole industry chain of rare earth REA crack down on illegal activities · "People's Republic of China Environmental Protection Tax Law" January 1, 2018 release "China Ambient Air Quality management evaluation report (2017) "released a lot of PM2.5 decreased significantly ·" Soil Pollution Control Law "is about to start second trial soil repair market bullish 2018 Xiamen International vending machines and self-service products Exhibition Venue - Time 2018 Smart Retail in Xiamen Terminal Conference Venue - Time - Register Contact Us - 2018 Kunming Beauty Expo Registration Contact - Venue - Time 2018 Xiamen International Vending Machine and Self-service Products Exhibition Venue - Organizing Time · 2018 Xiamen Smart Retail Terminal Conference Venue - Time - Registration Contact - Exhibitors Fees 2018 The thirteenth Western Boiler Heating Ventilation and Air Conditioning and Refrigeration Equipment Exhibition · 2018 The 14th North China boiler HVAC Equipment Exhibition · IE expo 2018 The 19th China Central Bo Will · 2018 Kunming Beauty Expo Registration Contact - Venue - Organizing Time · 2018 Kunming Beauty Expo venue - Time - Registration Contact - Participation Fee 2018 Wuhan US Fair Registration Contact - Location - Time 2018 Wuhan Beauty Expo where? · 2018 Wuhan Beauty Expo venue - Registration Contact - Time - Participation Fee 2018 Wuhan Beauty Expo Registration Contact - Location - Time - Participation Fee · 2018 February US International Water Treatment Environmental Exhibition · February 2018 Mexico Industry Manufacturing Exhibition · 2018 February India International Machine Tool and Molding Equipment Exhibition · February 2018 Turkey International Pump Valve Water Treatment and Air Conditioning and Refrigeration Exhibition JY-Q201 ultrasonic rubber cutter working principle Fine concrete mortar pump Features Which? 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