Design method for impeller and pumping chamber of high-lift peripheral pump
A pressurized water chamber and vortex pump technology, which is applied to parts, pumps, and pump components of elastic fluid pumping devices, can solve the problem of not proposing the design method of impeller and pressurized water chamber, increasing the manufacturing and processing of vortex pump units Difficulty, inability to adapt to changes in head working conditions, etc., to achieve the effect of improving internal flow conditions, increasing design head and design flow values, and stabilizing performance curve characteristics
Active Publication Date: 2014-08-27
HUAWEI TEHCHNOLOGIES CO LTD
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Problems solved by technology
These two patents have the following three problems: 1. The problem that the conventional vortex pump cannot adapt to the change of the head condition and the sudden drop of the head under the large flow condition is not solved; 2. The design of the impeller and the pressurized water chamber that is different from the conventional vortex pump is not proposed Method; 3. The structural improvements of the above two patents have increased the manufacturing and processing difficulty of the vortex pump unit
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[0072] figure 1 and figure 2 Together, the geometrical and dimensional parameters of this high head scroll pump embodiment were determined. This is a vortex pump with closed impeller double-side open channel, the impeller blades (12) and the pressurized water chamber (8) are symmetrically arranged on both sides, and the impeller blades (12) adopt a straight blade structure, which is located in the impeller (7 ) is axisymmetrically distributed on the outer edge. The pressure water chamber (8) has a trapezoidal structure, and its flow area is larger than the design value of conventional vortex pumps, which is beneficial to reduce the hydraulic loss of the liquid in the pressure water chamber and improve the momentum exchange level of the liquid in the impeller blades (12). Water outer diameter D v2 (5) slightly larger than the outer diameter of the impeller D 1 (1), the width of the pressurized water chamber b 2 Greater than the impeller outlet width b 1 . The inlet pipe...
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The invention provides a design method for the impeller and the pumping chamber of a high-lift peripheral pump which has the characteristics of high lift and large flow and is applicable to the fields of agricultural plant protection, foods, medicines and the like. According to the design method for the impeller and the pumping chamber, the geometrical parameters of the impeller and the pumping chamber are related with performance parameters of pump design points by relational expressions, and several relational expressions are provided for determining main geometric dimension parameters of the impeller and the pumping chamber, including: impeller outer diameter D1, impeller outlet width b1, blade width bi, blade height h, blade number z, baffle plate placing angle theta, pumping chamber outer diameter Dv2, pumping chamber inner diameter Dv1 and pumping chamber width b2. The peripheral pump designed by using the design method for the impeller and the pumping chamber provided by the invention has the advantages of high lift, large flow and stable performance curve, can be used for conveying vapor-liquid mixed mediums, and has good operational stability and suction performance.
Description
technical field [0001] The patent of the present invention relates to a design method of an impeller and a pressurized water chamber of a high-lift vortex pump, specifically, a design method of a high-lift vortex pump suitable for the fields of agricultural plant protection, medicine and food. Background technique [0002] The vortex pump is a type of centrifugal pump with a very low specific speed. It is used in various industrial and agricultural pipeline pressurization occasions, and is suitable for the transportation of some acids, alkalis and corrosive liquids. Conventionally designed vortex pumps generally have the characteristics of small flow, low efficiency, and poor cavitation performance. Especially under the condition of large flow, the head of conventionally designed vortex pumps will drop sharply, and the outlet pressure will also increase with the The rapid decrease cannot satisfy the function of pressurized delivery of the pipeline. Therefore, the pump is not...
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IPC IPC(8): F04D29/22F04D29/42
Inventor 欧鸣雄
Owner HUAWEI TEHCHNOLOGIES CO LTD
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