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Correct choice of three-screw pump technology If the improper selection of three-screw pump, not only can not get satisfactory operation results, but also lead to pump noise and vibration, and even serious damage to the internal pump components, the pump system does not work, therefore, Selection of personnel should be more careful consideration, a reasonable selection. Three screw pump selection, to be as detailed as possible to understand the conditions of the pump, in addition to the operating parameters, such as flow, pressure needs to be clear, the characteristics of the transmission medium such as media corrosivity, gas content, solid solution containing the ratio And the size of the solid particles, as well as medium temperature, viscosity, specific gravity, corrosive materials such as pumping equipment and suction conditions, to understand the installation conditions. According to our experience, the selection should pay attention to the following points: First, the choice of pump speed 1. The transmission medium viscosity and pump specifications to determine the speed range: When transporting high viscosity medium, the pump should be selected low speed, if the viscosity is low , The corresponding choice of high speed: medium viscosity> 20 ° E, for large-size pump (the main rod diameter 60mm and above), the speed of 970rpm or 720rpm appropriate, if the viscosity is higher (viscosity> 80 ° E) Glue, to reduce the speed of use, recommended 200-500rpm; for small size pumps, media viscosity> 20 ° E, the speed of 1450rpm or 970rpm appropriate, if the viscosity is higher (viscosity> 80 ° E), can reduce the speed Use, recommended 300-600rpm; 2. Due to the pump speed is higher, the same performance parameters, the smaller the pump size, but because of high speed, high friction power, the pump wear on the life is short, if the delivery Medium lubrication is relatively poor or contains trace impurities, should choose a lower speed, so that the pump to maintain a longer life, recommended below 1450rpm. Second, the choice of structure according to the installation and use of the pump reference to the three screw pump series and type, in principle: 1. Transport lubricated oil, the temperature below 80 ° C select the built-in bearing structure of the pump; The pump with external bearing structure is selected when the temperature is over 80 ° C or the lubrication of the conveying medium is poor. 3. The pump with the poor fluidity and high viscosity or the pump with double-layer heating structure is selected when the medium to be conveyed needs to be heated or insulated ; 4. High temperature transport, should choose the pump made of high temperature materials, please contact with our factory. Three screw pump flow, pressure in the same speed, viscosity is approximately linear relationship, the higher the pressure, the smaller the flow. The same viscosity, pressure, pump flow and speed is approximately proportional to. The same speed, viscosity, shaft power and pressure is approximately proportional. The same viscosity, pressure, shaft power and speed is approximately proportional. As the viscosity increases, both flow and shaft power increase, but because of the complex relationship between them, consult a specialist if necessary. As long as the three screw pump properly selected, maintenance is reasonable, you can get satisfactory operating results.