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Water pump type selection method of large-scale pump station low-lift pump device

A technology for low-lift pumps and large-scale pumping stations, applied in the direction of design optimization/simulation, etc., can solve problems such as low work efficiency, low unit operation efficiency, and high net head ratio, so as to improve the quality of selection, scientific selection methods, The effect of improving selection efficiency

Pending Publication Date: 2020-01-17
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often based on experience, the trial and error method is used for comparison and selection, and the work efficiency is very low
The loss of the inlet and outlet channels of low-lift pumping stations accounts for a large proportion of the net head, and it is difficult to carry out theoretical calculations. However, checking the pump head by equal flow and hydraulic loss theoretically does not ensure that the pump device works in the high-efficiency area.
The design and selection process of the existing pumping station cannot guarantee the design quality, which will inevitably lead to low operating efficiency of the unit and potential safety hazards

Method used

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  • Water pump type selection method of large-scale pump station low-lift pump device
  • Water pump type selection method of large-scale pump station low-lift pump device
  • Water pump type selection method of large-scale pump station low-lift pump device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] like figure 1 As shown, a pump selection method for a low-lift pump device in a large pumping station, the specific steps of selection are as follows:

[0024] (1) According to the known pump station design flow Q 0 and head H;

[0025] (2) The number Z of passing units is calculated by the formula Among them, Q is the flow rate of a single pump; Q 0 Design the total flow of the pumping station; Z is the number of units, and the single-unit flow Q of the pump is obtained;

[0026] (3) Substituting the nD value into the formula through the primary selection of the nD value Among them, n 11 is the unit speed of the pump; H is the head of the pump station, and the unit speed of the pump is n 11 ;

[0027] (4) Through the pump unit speed n 11 , obtained from the simplified linear relationship, the specific revolution number n of the pump device s =3.2364n 11...

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Abstract

The invention discloses a water pump type selection method of a large-scale pump station low-lift pump device. The invention belongs to the technical field of hydraulic engineering and fluid mechanical engineering. The model selection method is scientific and has a clear principle, the flow Q0 and the lift H are designed through a known pump station; the flow Q of a single water pump is solved byselecting the number Z of units of 2-3 schemes; aDJUSTING ND VALUES, the specific speed similar to that of an excellent pump device is obtained; the most critical water pump nD value and the specificrevolution of the pump device are designed to establish a quantitative relation through the pump device model test database, so that the water pump model selection process is stylized, the optimal model selection of the water pump device is quickly realized, the model selection efficiency is improved, and the model selection quality is improved.

Description

technical field [0001] The invention belongs to the technical fields of water conservancy engineering and fluid mechanical engineering, and relates to a type selection method of a pump device, in particular to a water pump type selection method for a low-lift pump device of a large pumping station. Background technique [0002] Under the condition that the design flow and head of the pumping station are known, the purpose of large-scale pumping station design is to determine the type of pump device, the set of the pump unit, the diameter of the pump impeller, and the speed of the pump, and optimize the hydraulic model of the pump to ensure the safety, stability and efficiency of the pumping station unit. run. Due to the large number of parameters that need to be considered, effective selection techniques and methods have not been formed so far. Often based on experience, the trial and error method is used for comparison and selection, and the work efficiency is very low. T...

Claims

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Application Information

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IPC IPC(8): G06F30/20
Inventor 汤方平胡秋瑾石丽建周颖柏周
Owner YANGZHOU UNIV
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