Method of analyzing fatigue reliability of axial pump based on pump device

An analysis method and technology of axial flow pumps, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as time-consuming, cumbersome calculation process, and difficult to master

Active Publication Date: 2018-03-27
SHANGHAI LIANCHENG(GRP) CO LTD +6
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Problems solved by technology

University research institutes mostly use the fluid-solid coupling method to calculate the stress at the blade root of the axial flow pump to analyze the fatigue reliability

Method used

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  • Method of analyzing fatigue reliability of axial pump based on pump device
  • Method of analyzing fatigue reliability of axial pump based on pump device

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. A flow chart of fatigue reliability analysis of an axial flow pump based on a pump device is as follows: figure 1 shown.

[0023] Taking the axial flow pump device using the ZM3.0 hydraulic model as an example, the three-dimensional mathematical model of the axial flow pump device was constructed using three-dimensional modeling software, and then the three flow rates of the vertical axial flow pump device were simulated using numerical simulation technology. Working conditions (small flow conditions Q =240 L / s, the optimal working condition is 320 L / s and the large flow working condition is 400 L / s), the three-dimensional constant value calculations, the three flow working conditions are all satisfied that the residual convergence accuracy of each physical quantity is lower than 1.0× 10 -5 requirements, and the head change tends to be stable....

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Abstract

The invention relates to a method of analyzing fatigue reliability of an axial pump based on a pump device; the method comprises the steps of 1), constructing a three-dimensional mathematical model for the axial pump device, and solving by calculating three-dimensional constant values according to flow conditions of the axial pump device; 2), determining positions of maximum and minium pressures on axial pump blades, and setting the positions as monitoring points; 3), calculating an average pressure of the monitoring points, and averaging pressure values in pressure time-domain graphs of the monitoring points, and calculating to obtain main frequency pressure amplitudes of the monitoring points so as to obtain pressure-amplitude ratio of the axial pump; 4), analyzing axial flow pump fatigue reliability for the axial pump device operating under multiple flow conditions. By using the method herein, analysis on the fatigue reliability of the axial pump with the axial pump device operatingunder multiple flow conditions is facilitated.

Description

technical field [0001] The invention relates to an analysis method for the fatigue reliability of an axial flow pump based on a pump device, in particular for an axial flow pump station operating under multiple flow conditions, and belongs to the technical field of pump station engineering. Background technique [0002] Axial flow pumping stations are widely used in engineering fields such as farmland irrigation, flood control and drainage, and water transfer across river basins. The key factor of life. During the operation of the pump station, the flow inside the axial flow pump presents three-dimensional, unsteady and viscous characteristics. The fatigue reliability of the axial flow pump is mainly affected by the dynamic and static interference between the impeller and the guide vane body, the impeller Due to factors such as internal flow separation and the influence of water inlet conditions on the force of the axial flow pump, the influence of the flow field in the axia...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2119/06
Inventor 杨帆汤方平高慧成立孙丹丹黄辉
Owner SHANGHAI LIANCHENG(GRP) CO LTD
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