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DESIGN TREND OF CENTRIFUGAL PUMP

Release time:

2020-06-01 16:55

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1 Centrifugal pump design for the final day of market-oriented design is to produce products to meet market demand. But whether the designed product can meet the expected requirements, the degree of satisfaction, that is, the quality and performance of the product, mainly in the design stage. From the point of view of cost, design is usually the stage that costs the least to develop a product at each stage, but it may be the most expensive in consequence. The market demand for pump products is also developing in the direction of diversification and specialization. The technical requirements for pump products are becoming higher and higher, such as running reliability, running performance, product life, etc. . The speed of upgrading Centrifugal Spring Products is accelerating. In addition, the Centrifugal pump crystal shape has also become a decision to determine the level of commodity is not a factor to be ignored. 2 The design of the Centrifugal pump is developing toward the polarization force. Recently, the centrifugal pump is developing toward the direction of high speed, high pressure and high lift, that is, to the direction of low specific speed, and to the direction of low pressure. Large flow, low head direction of development, that is to drainage and irrigation water diversion axial flow centrifugal pump direction of development. At present, the low specific speed centrifugal pump has gradually been able to provide the liquid high pressure which only the positive displacement pump can provide. The low specific speed centrifugal pump is widely used in petrochemical, pharmaceutical and chemical industries because of its small flow and high lift. Low specific speed centrifugal pumps have been developed into high-pressure, high-efficiency, high-density pumps with less specific speed. However, low specific speed centrifugal pumps generally have low efficiency and low flow stability. If the head-flow characteristic curve of Centrifugal pump has a positive slope rising section, the centrifugal spring will be unstable when it works below the design point or the optimum efficiency point. 3 the CAD and Cam Technology is widely used in the hydraulic design of Centrifugal pump, which involves a lot of complicated calculation and drawing. Compared with the conventional methods, such as design, calculation, drawing and drawing of up-stroke Diagram, it can speed up the design progress, shorten the time of weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon weapon system,. CAD technology is also used to optimize the local parameters of impeller and Volute, and to adjust the pump parameters by CAD man-machine dialogue model. So far, there is not enough knowledge about the flow law in the middle of Centrifugal pump. The hydraulic design of Centrifugal pump can only be carried out on the basis of semi-theory and semi-empirical method.

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