Flow regulating device for backflow type centrifugal water pump

A technology of flow regulating device and centrifugal water pump, which is applied in the direction of non-variable pump, pump control, machine/engine, etc., can solve the problems of high investment cost, etc., and achieve the effect of reducing power, reducing hydraulic loss, and reducing power consumption during operation

Inactive Publication Date: 2012-07-04
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial investment cost of frequency converter adjustment is relatively large for larger water pumps. For example, the investment of the frequency converter system equipped with the above-mentioned large water pump motors must be more than one million yuan.

Method used

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  • Flow regulating device for backflow type centrifugal water pump
  • Flow regulating device for backflow type centrifugal water pump

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Embodiment Construction

[0015] The following describes in detail with reference to the accompanying drawings: the main pipeline includes a water source, a first check valve 7, a centrifugal water pump, a first flow regulating valve and a second check valve; the backflow structure includes a first three-way 2, a second flow regulating valve 5 and The second three-way 6; the output end of the centrifugal water pump 1 is connected to the first three-way 2 through the pipeline, the first three-way 2 is connected to the first flow regulating valve 3 through the pipeline, and the first flow regulating valve 3 is connected to the second flow regulating valve 3 through the pipeline. Check valve 4; the first three-way 2 is connected to the second flow regulating valve 5 through the pipeline, the second flow regulating valve 5 is connected to the second three-way 6 through the pipeline, and the second three-way 6 is respectively connected to the water source 8, Centrifugal water pump 1 inlet. The first check v...

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Abstract

The invention discloses a flow regulating device for a backflow type centrifugal water pump. The output end of the centrifugal water pump is connected with a first tee joint through a pipeline; the first tee joint is connected with a first flow regulating valve through a pipeline; the first flow regulating valve is connected with a second check valve through a pipeline; the first tee joint is connected with a second flow regulating valve through a pipeline; the second flow regulating valve is connected with a second tee joint through a pipeline; and the second tee joint is respectively connected with a water source and the centrifugal water pump through a pipeline. The invention has the advantages that: steplesss regulation of output flow and pressure is realized in a mode of partial backflow of a pump opening, and backflow water flow is circulated inside the water pump, so that the water pump operates at a position close to the optimal operating point, and the loss of water power is reduced; energy carried by the water pump is fed back to an inlet of the water pump through a water head, so that the power of an input shaft of the water pump is substantially reduced, and the electric energy consumption of the water pump is finally reduced during operation; and the device has a simple structure and low cost.

Description

technical field [0001] The invention relates to an output flow and pressure regulating device of a centrifugal water pump, and a backflow centrifugal water pump flow regulating device which uses the backflow size to control the output flow and pressure of the water pump. Background technique [0002] Centrifugal pumps are widely used in various industries. In the design of pump systems, for the sake of safety, pumps with slightly larger flow and lift than the actual working conditions are generally selected, and then the flow and pressure regulating devices are used to make them work at the required level. working condition. In order to realize the stepless adjustment of the output flow and pressure, the throttle valve throttling adjustment or the motor with the frequency converter variable speed adjustment is generally used at present. The throttling adjustment is convenient and reliable, but it is accompanied by a large energy waste, which is very surprising for a large w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/00
Inventor 黄恺张辉张艳冬
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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