A Method for Analyzing Hydraulic Stability of Pump Units Based on Calculation of Constant Values

Abstract

The invention relates to an analysis method for the hydraulic stability of a pumping station, especially for a pumping station operating under multiple working conditions, and belongs to the technical field of hydraulic engineering pumping stations. Based on the three-dimensional constant value calculation results of the whole flow channel of the pump device, the tangential velocity of each point of the inlet section of the outlet channel is obtained; the calculation formula of the momentum parameter SM is constructed; the tangential velocity of the inlet section of the outlet channel is calculated by using the calculation formula of the momentum parameter SM Solve. The method of the present invention is advanced and scientific, and the method can be used to comprehensively compare the hydraulic stability of pump devices of different schemes, avoid the singleness of using only the efficiency of the pump device as an evaluation index, and solve the problem of using three-dimensional unsteady numerical calculations to solve the calculation of the entire channel of the pump device The problems of long time consumption and high requirements for hardware equipment are conducive to the rapid analysis of the hydraulic stability of the actual pumping station, saving the time period of pumping station scheme comparison, achieving the purpose of speeding up the selection of pumping station engineering schemes, and also providing support for different schemes of pumping devices. Preferably a reliable method is provided.

Description

technical field [0001] The invention relates to an analysis method for the hydraulic stability of a pumping station, especially for a pumping station operating under multiple working conditions, and belongs to the technical field of hydraulic engineering pumping stations. Background technique [0002] The stability of the pumping station unit is manifested in two aspects: the hydraulic vibration and the mechanical and electrical vibration of the unit. The influence of the mechanical and electrical vibration is already very small and there are many preventive and improvement measures. The cause of the hydraulic vibration is the internal flow state of the pump device. of. In recent years, some domestic pumping stations have experienced vibration problems, which not only affect the normal production tasks, but some even endanger the safe operation of the pumping stations. Therefore, the hydraulic stability of pumping devices has caused widespread concern in pumping device desig...

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Problems solved by technology

[0003] The purpose of the patent of the present invention is to provide a simple and reliable analysis method for the hydraulic stability of the pump device under multiple working conditions in view of the above-mentioned problems in the analysis of the hydraulic stability of the actual engineering pump device, which mainly solves two problems: ① solves the problem of the pump device Hydraulic stability analysis is time-consuming and requires high hardware requirements; ② An analysis method for hydraulic stability comparison of multi-working conditions and multi-scheme pump installations is proposed

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