Optimum design method of jet type self-absorbing centrifugal pump

Abstract

The invention provides an optimum design method of a jet type self-absorbing centrifugal pump. In order to solve the problems of inlet impact loss and disc friction loss and the problem that the shut-off point lift cannot be improved under the circumstance of the fixed impeller outer diameter, the optimum design method of carrying out cutting on an inlet of an impeller, arranging a front cover plate and a rear cover plate in an inclined manner and arranging flow dividing blades is provided. According to the method, the cutting length a and b of the two sides, namely the vertical side and the horizontal side of the inlet side are given, the diameter Dt of the inclination position of the front cover plate and the rear cover plate is given, the wall thickness delta 1 of the front cover plateand the rear cover plate at an outlet of the impeller after inclination optimization is carried out is given, the number Z1 of long blades after flow dividing blades are arranged is given, the wrap angle phi 1 of the long blades after optimization is carried out is given, the inlet diameter Dsi of the flow dividing blades is given, the arc length S2 of the flow dividing blades is given, the peripheral polarization theta 1 of the flow dividing blades is given, the inclination angle alpha 2 of the flow dividing blades is given, and the parameter selection and optimization method of the thicknessof the flow dividing blades is given. The method is easy to implement and can effectively improve performance of the high jetting type self-absorbing centrifugal pump.

Description

technical field [0001] The invention belongs to the field of centrifugal pump research, and in particular relates to an optimal design method of a jet-type self-priming centrifugal pump. Specifically, the invention relates to the optimization of the inlet of the impeller, the optimized setting of the inclination of the front and rear cover plates of the impeller, and the design method of distributing blades between the long blades. Background technique [0002] As a general machine, the pump is mainly used to convert the mechanical energy of the prime mover into the energy of the liquid. There are many types of pumps, and they have been widely used in various sectors of the national economy and high-tech fields such as aerospace ships. According to statistics, the power consumption of pumps accounts for 18% of the total power generation, so the energy saving potential is huge. For the jet-type self-priming centrifugal pump, in addition to the efficiency, the lift at the dea...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned jet type self-priming centrifugal pump with large inlet loss, disc friction loss, impeller outer diameter D 2 After fixing the problem that the lift at the dead point cannot be increased and the noise is large, an optimal design method for a jet-type self-priming centrifugal pump is provided

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