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Large-scale water pump unit and working condition adjusting mode accurate quantitative model-selection method

An adjustment method and technology of pump sets, applied in pump testing, mechanical equipment, machines/engines, etc., can solve problems such as waste of operation and equipment costs, incomplete consideration of factors, unreasonable selection of models, etc.

Active Publication Date: 2013-01-02
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is based on problems such as incomplete consideration factors, unreasonable type selection, and waste of operation and equipment costs in the selection of large-scale water pump units at present.

Method used

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  • Large-scale water pump unit and working condition adjusting mode accurate quantitative model-selection method
  • Large-scale water pump unit and working condition adjusting mode accurate quantitative model-selection method
  • Large-scale water pump unit and working condition adjusting mode accurate quantitative model-selection method

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Embodiment Construction

[0056] Adopt technical scheme of the present invention, below in conjunction with attached Figure 5~7 The present invention will be further described with the case, but this case should not be construed as limiting the present invention.

[0057] A pumping station is required to have the functions of water diversion and flood drainage at the same time, the designed annual running time of water diversion is 5000 h, and the design flow rate of water diversion is 150 m 3 / s, the water transfer design head is 2.35 m, the average head is 2.05 m, the minimum head is 1.45 m, and the maximum head is 2.75 m; the design head of the pumping station is 4.25 m, and the maximum head is 4.75 m.

[0058] In general, the gearbox transmission efficiency and high-speed motor efficiency can reach 98% and 96% respectively, then the product of the motor efficiency and the gearbox transmission efficiency is 98%×96%=94%, which is lower than the low-speed motor efficiency of 95% (direct The transmis...

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Abstract

The invention discloses a large-scale water pump unit and a working condition adjusting mode accurate quantitative model-selection method and belongs to the technical field of pump stations. The method is characterized by comprising the steps of A), firstly choosing various types of feasible pump sizes and number; B), determining the power of matching electrical motors in various feasible pump sizes initially; C), calculating variable working condition annual optimizing operation cost of a pump unit and total device cost caused when a pump station unit is provided with different working condition adjusting modes, the total cost of running and devices of the pump station unit in the period of the service life when a frequency conversion speed-changing adjusting mode, a total angle-changing adjusting mode and a half working condition adjusting mode are arranged for the pump station unit; and comparing total costs of different schemes and determining that the total cost which is the lowest is a best scheme. According to the pump unit device model-selection method, the usage requirement of a pump station can be guaranteed, high efficiency can be achieved, the cost of the device can be saved, and the running cost can be saved. The method can be applied to water pump units of national medium and large pump stations and selection of working condition adjusting modes and optimizing operation, and the electrical energy and the device cost are saved.

Description

technical field [0001] The invention relates to a type selection method for a water pump unit, in particular to a quantitative type selection method for a large-scale water pump unit and its working condition adjustment mode, and belongs to the field of planning, design and type selection of a pump station and a water pump unit. Background technique [0002] The large water pump unit is mainly composed of pump device, motor, transmission device and adjustment mechanism. The traditional selection method of pump units: ① Under the design head, the pumping flow meets the design flow requirements, and the pump efficiency is high; ② Under the average head, the pump should work in the high efficiency area. According to the design head of the pumping station, it is often impossible to determine the only suitable pump type (for example, for a pumping station with a design head of about 7 m, vertical axial flow pumps, horizontal mixed flow pumps, vertical mixed flow pumps, inclined a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 仇宝云冯晓莉贺淑全董波
Owner YANGZHOU UNIV
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