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Method for measuring screen mesh form breaking point

A technology of bubble breaking point and screen mesh, which is applied in the field of measuring the bubble breaking point of the screen used in the propellant management device of the satellite surface tension storage tank, can solve the problems of large measurement data errors, achieve reliable data, scientific measurement methods, and solve The effect of large errors in measurement data

Inactive Publication Date: 2009-12-09
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the bubble breaking point of the sieve in view of the deficiencies in the prior art, which solves the limitations of judging the rupture of the sieve liquid film by visual observation and the problem of large measurement data errors, and the measurement method is scientific. , simple operation, reliable data

Method used

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  • Method for measuring screen mesh form breaking point
  • Method for measuring screen mesh form breaking point

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Embodiment Construction

[0016] Below in conjunction with specific embodiment, further illustrate the present invention.

[0017] refer to Figure 1~2 , the measurement object among the present invention is the screen cloth 3 in the cavity 1, and the screen cloth 3 surface covers liquid film 2, and cavity body 1, screen cloth 3 constitute a closed space; Measuring device consists of pressure gauge (or pressure sensor) 4, The gas flow regulating valve 5, the shut-off valve 6, and the booster pipeline 7 are composed of the booster pipeline 7 connected with the confined space, and the pressure gauge (or pressure sensor) 4, the gas flow regulating valve 5, and the shut-off valve 6 are sequentially connected in series to the booster. Pressure line 7.

[0018] The screen to be tested is a stainless steel screen with a specification of 325 mesh × 2300 mesh, the liquid is isopropanol, the allowable error of the bubble breaking point measurement result is ±100Pa, the range of the pressure sensor is 10000Pa, a...

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PUM

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Abstract

The invention discloses a method for measuring the bubble breaking point of a sieve, which is characterized in that the sieve to be tested is wetted with a liquid, and a liquid film is formed on the surface to form a closed space together with a cavity; the closed space is pressurized, and the The gas in the confined space is in a quasi-equilibrium state. Collect and draw the pressure-time curve of the gas in the confined space. When the pressurization rate drops and there is an inflection point, the pressure at the inflection point is the bubble breaking point of the screen to be tested. The invention determines the breakage of the liquid film on the surface of the screen through the change of the pressurization rate, thereby measuring the breaking point of the screen bubble. The problem of large data errors.

Description

technical field [0001] The invention relates to the technical field of pressure detection, in particular to a method for measuring the bubble breaking point of a screen used in a propellant management device for a satellite surface tension storage tank. Background technique [0002] Under the effect of surface tension, the wet screen can block the passage of gas to a certain extent. When different air pressures are applied to one side of the wet screen, when the pressure difference reaches a certain value, the gas will pass through the screen from the high-pressure side to the low-pressure side, and the pressure difference that the screen bears at this time is called Bubble burst point, which reflects the ability of the wet screen to block the passage of gas. The bubble breaking point of the screen is inversely proportional to the maximum pore size of the screen and directly proportional to the surface tension coefficient of the liquid medium that wets the screen. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/02G01N33/00
Inventor 程彬姜万顺
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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