A test method and test equipment for hydraulic model combination of rotary power pump

Abstract

The invention discloses a test method and test equipment for a hydraulic model combination of a rotary power pump, belonging to the technical field of rotary power pump tests. The test method provided by the present invention utilizes the existing multi-stage rotary power pump as the initial prototype to be tested, and transforms the initial prototype to be tested according to the combination of n kinds of hydraulic models to be tested to obtain n kinds of test prototypes M i . By testing n kinds of test samples M i Carry out a flow-head test and evaluate the obtained flow Q j ‑Head H iQj The data is processed to obtain a system of equations, and the solution results of the system of equations are processed to obtain the flow-head curves of n combinations of hydraulic models to be tested. Since this test method can utilize most of the parts in the existing multistage rotary pump, there are few parts that need to be redesigned, so the test cost can be greatly reduced. Moreover, the data processing method of this test method is relatively simple, which is conducive to improving test efficiency and quickly obtaining test results.

Description

technical field [0001] The invention relates to the technical field of rotary power pump tests, in particular to a test method and test equipment for a hydraulic model combination of rotary power pumps. Background technique [0002] In order to design a rotary power pump that meets the hydraulic requirements of multiple working conditions, two or more hydraulic model combinations are generally selected. The hydraulic model combination is for a single impeller and its matching guide vane. Therefore, each The flow-head curve of hydraulic model combination is the key to design high-quality rotary power pump. [0003] In order to obtain the flow-head curve of each hydraulic model combination, the following four methods are generally used in the prior art: [0004] Method 1: Similar design method, design and manufacture multiple single-stage model pumps according to a certain size ratio. [0005] This method needs to design the impeller and guide vane (or volute) into reduced-s...

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Problems solved by technology

[0013] The advantages of this method are similar to those of method three, and it can solve the problem that impellers and guide vanes cannot be replaced at different stages in method three, but this method needs to design and manufacture a new single-stage model pump, and in some In some cases, in order to meet the interface matching requirements during replacement, without changing the hydraulic model of the impeller and guide vane, it is necessary to adapt the design of the interface matching size, which is labor-intensive and time-consuming

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