Multi-working-point design method for centrifugal pump impeller

Abstract

The invention provides a design method for a centrifugal pump impeller which can meet the requirements of multiple working points. The characteristics of the design method are as follows: when the centrifugal pump impeller is in design, geometric parameters of the centrifugal pump impeller are associated with performance parameters of different working points, so as to achieve the effect that the designed performance curve of a pump is overlapped with the required performance curve. The geometric parameters of the impeller which is designed by the method in the invention can be adjusted so as to achieve the purpose that the performance of the centrifugal pump can meet the requirements of multiple working points. The design method can ensure the consistency between the actual running performance curve of the centrifugal pump and the required performance curve, and is particularly suitable for designing the centrifugal pump impeller with strict requirements of multiple working points.

Description

Technical field [0001] The invention relates to a multi-working point design method of a centrifugal pump impeller, which can be used in the design of the impeller in the low specific speed working condition of the centrifugal pump, and can also be used in the design of the impeller in the high specific speed working condition of the centrifugal pump. It is especially suitable for use in situations where the performance parameters of centrifugal pumps with multiple working conditions are strictly required. Background technique [0002] At present, the known centrifugal pump impeller design adopts the speed coefficient method. This method is to design the geometric parameters of the impeller according to a certain working point proposed in the application. The formula for determining the main geometric parameters of the impeller is as follows: [0003] D 2 = K D 2 ...

AI Technical Summary

Problems solved by technology

It can be seen that the hydraulic design of centrifugal pump impellers using the speed coefficient method is increasingly incompatible with the increasingly complex production needs

[0012] Prior patent technology No. 89212885.2 patent "involute impeller for rotating fluid machinery", patent No. 90214606.8 "a non-overload low specific speed centrifugal pump impeller" and patent No. 200410014937.0 "a low specific speed centrifugal pump impeller Design method”, put forward some new design methods, but in these three patents, the design of the geometric parameters of centrifugal pump impellers is based on the optimal efficiency operating point, and can only guarantee the optimal efficiency operating point It does not consider how to ensure the performance of other operating points, and cannot meet the multi-operating point design requirements of centrifugal pump impellers

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