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Device used for pump cavitation experiment and implementation method thereof

An implementation method and experimental technology, applied in pump control, non-variable-capacity pumps, machines/engines, etc., can solve problems such as poor equipment versatility and cumbersome operation, and achieve the effects of improving efficiency, simplifying test methods, and reducing costs.

Inactive Publication Date: 2015-02-04
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device for pump cavitation test and its implementation method, which overcomes the problems of cumbersome operation and poor equipment versatility in the current test method, and achieves the purpose of simplifying the operation

Method used

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  • Device used for pump cavitation experiment and implementation method thereof
  • Device used for pump cavitation experiment and implementation method thereof

Examples

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Effect test

Embodiment

[0029] Such as figure 1 The device used for pump cavitation experiment is shown as an example. The rated flow rate of the pump is 93t / h and the head is 32mH. 2 O, first connect the test pump 5 to the test circuit, after the connection is completed, fill the system with water, and establish the initial pressure of the surge tank 7, start the test pump 5, and adjust the test flow by adjusting the regulating valve 4 on the test outlet pipeline After reaching 93t / h, after the operation is stable, start the water ring vacuum device 10, and slightly open the regulating valve 4 between the surge tank 7 and the water ring vacuum device, and stop the water ring vacuum after the pressure in front of the test pump reaches the required vacuum degree Device 10, carries out data collection by relevant measuring instrument 11, collects data such as figure 2 As shown by the diamond-shaped solid points in , figure 2 The middle abscissa is NPSH, unit / mH 2 O; the ordinate is the pump head, ...

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Abstract

The invention discloses a device used for a pump cavitation experiment and an implementation method of the pump cavitation experiment. In the experiment process of a closed experiment device for a cavitation experiment by utilizing a water ring vacuumizing device and the slight opening degree of a valve, the sealing of surge tanks is kept by utilizing a water seal and a slight opening device of the valve in front of the water ring vacuumizing device, the vacuum degrees of the surge tanks can be established through the slight opening degree of the valve when the vacuumizing device operates, the water seal can be automatically formed until the water ring vacuumizing device stops operation, and thus the sealing is realized; therefore, the water ring vacuumizing device and the valve between the surge tanks do not need to be opened or closed in the experiment process, and the cavitation experiment can be completed only by starting and stopping a pump, so that the operation is simplified; moreover, other pump performance experiments such as flow-lift can further be realized in the experiment device, so that the cost of the experiment device is reduced.

Description

technical field [0001] The invention relates to the field of pump cavitation tests, in particular to a device for pump cavitation tests and a realization method thereof. Background technique [0002] Cavitation is when the partial pressure of the liquid (which can be water, oil, etc.) in the flow channel (which can be pumps, turbines, rivers, valves, propellers, or even human and animal blood vessels, etc.) drops to the critical pressure (generally close to the vaporization pressure) , The gas nuclei in the liquid grow into bubbles, the general term for the accumulation, flow, splitting and collapse of bubbles. [0003] When the suction vacuum of the pump is greater than the allowable suction vacuum, cavitation occurs. It mainly occurs at the blades and cover plates on the outer edge of the impeller, the volute or the guide wheel, and does not occur at the inlet of the blades. For example, when the flow rate is greater than the design flow rate, it occurs at the front of t...

Claims

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Application Information

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IPC IPC(8): F04D15/00
CPCF04D15/0088
Inventor 陈志辉邓礼平肖坤建李毅刘立志
Owner NUCLEAR POWER INSTITUTE OF CHINA
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