Optimal design method for inducer with varying pitch of centrifugal pump

An optimized design and technology of centrifugal pumps, applied to components, pumps, pump components, etc. of pumping devices used for elastic fluids, can solve problems such as increased unstable forces, decreased efficiency of inducers, and decreased hydraulic efficiency of pump main impellers , to achieve the effect of improving efficiency, enhancing operation stability and improving performance
CN102705263AActive Publication Date: 2012-10-03JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2012-10-03

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Abstract

The invention discloses an optimal design method for an inducer with a varying pitch of a centrifugal pump, belonging to the technical field of pumps. The optimal design method is characterized by comprising the following steps: when designing the inducer with the varying pitch, firstly, determining data such as flow of a peak efficiency point of the central pump, a necessary net positive suction head, a device net positive suction head and the like through experiments, and then determining geometric sizes of diameters of an inlet and an outlet of a rim of the inducer and a rim folding lead according to the experimental data and a flow condition of the inlet of a main impeller of the pump. According to the optimal design method for the inducer with the varying pitch of the centrifugal pump provided by the invention, the inducer and the main impeller of the pump have good energy matching relationship, the performance of the inducer is improved, the operation stability of the system is enhanced, difficulty in selection of a lift coefficient of the inducer according to experience is avoided, and the efficiency for designing the inducer is improved. The optimal design method has a certain popularization value.
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Description

technical field

[0001] The invention relates to a design method of an inducer of a centrifugal pump, in particular to an optimal design method of a variable-pitch inducer of a centrifugal pump. Background technique

[0002] The inducer technology is currently known as one of the most effective ways to improve the cavitation performance of centrifugal pumps and is widely used. The inducer belongs to the axial flow impeller, which is used to improve the cavitation performance of the centrifugal pump, and it can also work in a certain degree of cavitation state. Spiral inducer is a commonly used structure, and can be divided into two forms: equal pitch and variable pitch. Because the blade inlet angle of variable pitch inducer is smaller and the outlet angle is larger, a smaller inlet flow coefficient and a larger lift can be obtained, which better meet the cavitation performance requirements of the inducer itself and the energy at the inlet of the main impeller of the pump. ...

Claims

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