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A method for calculating a performance curve of a large-scale pump device

A calculation method and technology of pump device, which are applied in the direction of calculation, design optimization/simulation, special data processing application, etc., can solve the problem that large-scale pump device cannot be obtained simply and accurately

Pending Publication Date: 2019-01-25
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The present invention aims to find a calculation method for the characteristic curve of a large-scale pump device, and aims to solve the problem that the performance curve of a large-scale pump device cannot be obtained simply and accurately at present, improve the calculation accuracy, save time and cost, and ensure the safety, reliability and high efficiency of the pump station. Operation provides important theoretical value and practical significance

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  • A method for calculating a performance curve of a large-scale pump device
  • A method for calculating a performance curve of a large-scale pump device
  • A method for calculating a performance curve of a large-scale pump device

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Embodiment Construction

[0023] Further illustrate the present invention below by the mode of example:

[0024] Taking a pump station equipped with an axial flow pump impeller as an example, when the blade placement angle is 0°, the diameter D 2p =3000mm, speed n p = 136.4r / min pumping station large prototype pump, in D 2M =300mm, speed n M = 1450r / min standard model pump for conversion:

[0025] (1). According to the given prototype and model pump parameters, use the flow operating point within the performance curve range of the model pump to convert 15 different working conditions of the large-scale pump device, and determine the specific speed Therefore, the efficiency is converted to The selected points are converted corresponding to the converted flow Q by the pump similarity law, so that the performance curve of the model pump is converted into the performance curve of the prototype pump of the target size. Among them: the flow similarity law is: The head similarity law is: Law of Sim...

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Abstract

The invention provides a method for calculating a performance curve of a large-scale pump device, including: 1, according to the pump similarity theory, converting the performance curve of the standard model pump into the performance curve of the target size prototype pump through efficiency conversion, flow conversion, head conversion and power conversion; 2, coupling and simulating and calculating the flow in the inlet passage, the outlet passage and the pump; 3, calculating the hydraulic loss of the inlet passage and the outlet passage according to the simulation calculation result; 4, calculating the head of the large pump device and the efficiency of the device, so as to finally obtain the performance curve of the device. The invention has the characteristics of simple operation and easy realization, and can accurately predict the performance curve of the large-scale pump device, aiming at the problems that the large-scale pump device can not be directly tested and the numerical simulation result is not accurate enough.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a calculation method for the performance curve of a large-scale pump device. Background technique [0002] There are more than 500,000 drainage and irrigation pumping stations in my country, of which more than 60% are low-lift pumping stations. Low-lift pumping stations are widely used in major domestic water conservancy projects such as the South-to-North Water Transfer Project, the introduction of tender water into the Bailu River, and the pollution prevention and control of three rivers and three lakes. They also play an irreplaceable role in agricultural irrigation and drainage, water environment management, urban water supply projects, and ecological water demand projects. effect. With the development of economy and society, most low-head pumping stations can no longer meet the requirements and urgently need to be upgraded. The performance curve of ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 谈明高陆友东吴贤芳刘厚林王勇王凯董亮
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH