A Design Method of Three Working Condition Points for the Impeller of High Specific Speed ​​Axial Flow Pump

Abstract

The invention provides a design method for three operating points of an impeller of an axial-flow pump with high specific speed. Its characteristic is that when designing the impeller of the axial flow pump, the geometric parameters of the impeller are connected with the performance parameters of the pump's design operating point, small flow operating point and large flow operating point, so that the pump can be used in the above-mentioned The performance parameters of the three operating points can meet the design requirements. Through the design of the performance parameters of the three operating points, the control and adjustment of the characteristics of the pump performance curve can be realized to obtain the performance curve of the axial flow pump that meets the design requirements. The high specific speed axial flow pump designed by the invention can not only meet the design performance requirements of multiple working condition points, but also has the characteristics of high efficiency, wide high efficiency area and stable operation.

Description

technical field [0001] The patent of the present invention relates to a design method for three operating points of an impeller of a high specific speed axial flow pump, specifically, a design method for an impeller of a high-efficiency axial flow pump suitable for meeting the design requirements of multiple operating points. Background technique [0002] At present, the impeller design of axial flow pumps generally adopts the single operating point design method, and the determination and calculation of the impeller geometric parameters are based on the performance parameters of the design operating point. With the increase of the specific speed of the axial flow pump, its performance curve presents a typical saddle-shaped change, and the head curve of the axial flow pump drops first and then rises, thus forming an unstable operating condition. At the same time, under the condition of large flow rate, the head and efficiency curve of the axial flow pump are prone to signifi...

AI Technical Summary

Problems solved by technology

The existing patented technology still has the following two problems: 1. The existing related patented technology is all about the centrifugal pump impeller design method with radial blade structure, and there is no multi-working condition suitable for the high specific speed axial flow pump impeller. 2. The existing technology does not point out how many operating point performance parameters are the most suitable as design parameters, but only proposes a rough range, and too many or too few design parameters are likely to cause failure of the design process and inaccurate design results

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