Viscous liquid cavitation inception pressure measuring device

A measuring device and viscous technology, which can be used in measuring devices, measuring fluid pressure, fluid dynamics tests, etc., can solve problems such as inability to conduct in-depth research on cavitation of viscous liquids, and lack of attention to the conditions for cavitation of viscous liquids.

Inactive Publication Date: 2021-05-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few measurement devices for the incipient pressure of liquid cavitation at home and abroad, and most of the existing cavitation measurement devices focus on the study of cavitation characteristics under different flow fields. The fluid medium is basically water, and the cavitation of viscous liquids In-depth research on viscous liquid cavitation cannot be carried out due to the lack of attention to the conditions, etc., and the lack of basic data support

Method used

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  • Viscous liquid cavitation inception pressure measuring device
  • Viscous liquid cavitation inception pressure measuring device
  • Viscous liquid cavitation inception pressure measuring device

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a viscous liquid cavitation inception pressure measuring device, which can observe the cavitation inception pressure of the viscous liquid under different vacuum degrees and different temperatures.

[0047] Such as figure 1 and figure 2 As shown, the viscous liquid cavitation incipient pressure measurement device includes: a visual liquid storage unit 1 , a pressure control unit 2 , a temperature control unit 3 , a sensing unit 4 , an observation unit 5 and a measurement and control unit 6 .

[0048]Among them, the visualized liquid storage unit 1 is used to store the viscous liquid (such as oil) to be measured, and the visualized liquid storage unit 1 is fully transparent and visualized, which can fully and intuitively show the whole process of cavitation formation and collapse of the viscous liquid cavitation.

[0049] The pressure control unit 2 controls the pressure of the visualized liquid storage unit 1 by vacuuming, so that the viscous ...

Embodiment 2

[0056] The visualization liquid storage unit 1 in the embodiment 1 is further described in detail.

[0057] Such as figure 1 As shown, the visualized liquid storage unit 1 includes: a liquid storage bottle 1.1, an end cap 1.3 and a sealing assembly 1.4;

[0058] Among them, the liquid storage bottle 1.1 is completely transparent and is used to store viscous liquids; the liquid storage bottle 1.1 is made of acrylic material that does not react with the tested liquid and adopts integrated processing to ensure sealing; the volume of the liquid storage bottle 1.1 is adjustable, and can be adjusted according to Customized size is required.

[0059] The top opening of the liquid storage bottle 1.1 is sealed by the end cap 1.3 and the sealing assembly 1.4, wherein the sealing assembly 1.4 includes an upper sealing ring 1.4.1 and a lower sealing ring 1.4.2; both the upper sealing ring 1.4.1 and the lower sealing ring 1.4.2 are Lip-shaped sealing ring; the upper sealing ring 1.4.1 an...

Embodiment 3

[0064] The pressure control unit 2 in Embodiment 1 will be further described in detail.

[0065] Such as figure 2 and image 3 As shown, the pressure control unit 2 includes: a suction pipeline 2.2, a valve assembly 2.3, an independent air chamber 2.4 and a vacuum pump 2.5. The air extraction pipeline 2.2 includes: a first air extraction pipeline 2.2.1, a second air extraction pipeline 2.2.2 and a third air extraction pipeline 2.2.3; the valve assembly 2.3 includes: a first ball valve 2.3.1.

[0066] Wherein the end cap 1.3 in the visible liquid storage unit 1 is threadedly connected to one end of the first air extraction pipeline 2.2.1; the other end of the first air extraction pipeline 2.2.1 is connected to the second air extraction pipeline 2.2 through the first ball valve 2.3.1 .2 connected, the first ball valve 2.3.1 is threadedly connected with the first air extraction pipeline 2.2.1 and the second air extraction pipeline 2.2.2 respectively; the second air extraction ...

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PUM

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Abstract

The invention provides a viscous liquid cavitation inception pressure measuring device, which can be used for observing cavitation inception pressure of a viscous liquid at different temperatures. The measuring device comprises: a visual liquid storage unit used for storing a to-be-measured viscous liquid and having transparent and visible property; a pressure control unit used for controlling the pressure in the visual liquid storage unit, so that the viscous liquid in the visual liquid storage unit generates a cavitation phenomenon; a temperature control unit used for regulating and controlling the temperature of the viscous liquid in the visual liquid storage unit; a sensing unit used for monitoring the pressure, the air content and the temperature of the viscous liquid in the visual liquid storage unit; and an observation unit used for observing and recording whether the viscous liquid in the visual liquid storage unit is cavitated and the cavitation process.

Description

technical field [0001] The invention relates to a pressure testing device, in particular to a device for measuring the cavitation incipient pressure of viscous liquid, which belongs to the field of fluid machinery and cavitation experiment testing. Background technique [0002] Since the discovery of cavitation on the propeller blades in the second half of the 19th century, international scholars have carried out long-term and in-depth research on the cavitation phenomenon of fluid machinery, and the fields involved have become more and more extensive. In addition, the research on cavitation in other fields of viscous liquid machinery and rotating machinery has also obtained unprecedented development. [0003] Cavitation is a phenomenon in which bubbles are generated in a liquid when the partial pressure of the liquid is lower than a certain threshold. It is a typical two-phase transient flow, mainly related to temperature, pressure and flow rate, and commonly exists in flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/00G01M10/00G01N21/84
CPCG01L11/00G01M10/00G01N21/84G01N2021/8405G01N2021/8411
Inventor 刘城闫清东魏巍郭猛金宸
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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