RU94001706A - Method of leak-proofness test of multispace articles - Google Patents

Method of leak-proofness test of multispace articles

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Publication number
RU94001706A
RU94001706A RU94001706/28A RU94001706A RU94001706A RU 94001706 A RU94001706 A RU 94001706A RU 94001706/28 A RU94001706/28 A RU 94001706/28A RU 94001706 A RU94001706 A RU 94001706A RU 94001706 A RU94001706 A RU 94001706A
Authority
RU
Russia
Prior art keywords
vacuum chamber
pressure
gas
concentration
change
Prior art date
Application number
RU94001706/28A
Other languages
Russian (ru)
Other versions
RU2077039C1 (en
Inventor
Н.Г. Панов
Э.В. Щербаков
Original Assignee
Головное конструкторское бюро научно-производственного объединения "Энергия" им. акад. С.П. Королева
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Головное конструкторское бюро научно-производственного объединения "Энергия" им. акад. С.П. Королева filed Critical Головное конструкторское бюро научно-производственного объединения "Энергия" им. акад. С.П. Королева
Priority to RU94001706A priority Critical patent/RU2077039C1/en
Publication of RU94001706A publication Critical patent/RU94001706A/en
Application granted granted Critical
Publication of RU2077039C1 publication Critical patent/RU2077039C1/en

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  • Examining Or Testing Airtightness (AREA)

Abstract

FIELD: testing equipment. SUBSTANCE: article is placed into vacuum chamber. Air is evacuated from it till limiting residual pressure is achieved. Spaces of article are filled in preset sequence with technological gas and pressure in vacuum chamber is measured after filling of each space. Calibrated flow of testing mixture composed of indicating and technological gases is fed into vacuum chamber. Summary pressure is measured in vacuum chamber and change of concentration of indicating gas in vacuum chamber from calibrated flow under this pressure is also measured. Supply of calibrated flow of testing mixture of gases into vacuum chamber is stopped. Technological gas is released from spaces of article is sequence reverse to preset one. Spaces of article are filled with testing mixture of gases in preset sequence. After filling of each space with tested mixture of gases pressure in vacuum chamber is charged by supply into it of flow of technological gas by value equal to difference between pressure in vacuum chamber from this space and summary pressure in vacuum chamber and change of concentration of indicating gas in vacuum chamber from given space under this pressure (summary pressure) is measured. Leak-proofness of space is judged by comparison of change of concentration of indicating gas from each space with change of concentration of indicating gas from calibrated flow. EFFECT: increased precision of leak-proofness test of multispace articles of spacecrafts. 1 cl

Claims (1)

Изобретение относится к области испытательной техники и позволяет повысить точность контроля герметичности многополостных изделий космической техники. Помещают изделие в вакуумную камеру. Вакуумируют последнюю до предельного остаточного давления в ней. Заправляют полости изделия в заданной последовательности технологическим газом и измеряют давление в вакуумной камере после заправки каждой полости. Подают в вакуумную камеру тарированный поток контрольной смеси, состоящей из индикаторного и технологического газов. Измеряют суммарное давление в вакуумной камере и изменение концентрации индикаторного газа в вакуумной камере от тарированного потока при этом давлении (суммарном давлении). Прекращают подачу в вакуумную камеру тарированного потока контрольной смеси газов. Стравливают из полостей изделия в последовательности, обратной заданной, технологический газ. Заправляют полости изделия в заданной последовательности контрольной смесью газов. После заправки каждой полости контрольной смесью газов изменяют давления в вакуумной камере путем подачи в нее потока технологического газа на величину, равную разнице между давлением в вакуумной камере от этой полости и суммарным давлением в вакуумной камере, и измеряют изменение концентрации индикаторного газа в вакуумной камере от данной полости при этом давлении (суммарном давлении). Сравнивая изменения концентрации индикаторного газа от каждой полости с изменением концентрации индикаторного газа от тарированного потока, судят о герметичности полостей.The invention relates to the field of testing equipment and can improve the accuracy of the tightness control of multi-cavity products of space technology. Place the product in a vacuum chamber. Evacuate the latter to the maximum residual pressure in it. The product cavities are filled in a predetermined sequence with process gas and the pressure in the vacuum chamber is measured after filling each cavity. A calibrated flow of the control mixture consisting of indicator and process gases is fed into the vacuum chamber. The total pressure in the vacuum chamber and the change in the concentration of the indicator gas in the vacuum chamber from the calibrated flow at this pressure (total pressure) are measured. Stop the supply to the vacuum chamber of a calibrated flow of the control gas mixture. Bleed from product cavities in the reverse order of the process gas. The product cavities are filled in a predetermined sequence with a control gas mixture. After filling each cavity with a control gas mixture, the pressure in the vacuum chamber is changed by supplying a process gas stream to it by an amount equal to the difference between the pressure in the vacuum chamber from this cavity and the total pressure in the vacuum chamber, and the change in the indicator gas concentration in the vacuum chamber from this cavity at this pressure (total pressure). By comparing the changes in the concentration of the indicator gas from each cavity with the change in the concentration of the indicator gas from the calibrated flow, the integrity of the cavities is judged.
RU94001706A 1994-01-18 1994-01-18 Method of test of air-tightness of multispace articles RU2077039C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94001706A RU2077039C1 (en) 1994-01-18 1994-01-18 Method of test of air-tightness of multispace articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94001706A RU2077039C1 (en) 1994-01-18 1994-01-18 Method of test of air-tightness of multispace articles

Publications (2)

Publication Number Publication Date
RU94001706A true RU94001706A (en) 1996-05-10
RU2077039C1 RU2077039C1 (en) 1997-04-10

Family

ID=20151604

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94001706A RU2077039C1 (en) 1994-01-18 1994-01-18 Method of test of air-tightness of multispace articles

Country Status (1)

Country Link
RU (1) RU2077039C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102235936B (en) * 2010-04-27 2013-06-26 联合汽车电子有限公司 Airtightness test method for automobile electronic control unit shells and airtightness tester
RU2712762C1 (en) * 2019-03-20 2020-01-31 Публичное акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" Method of measuring degree of total tightness of multicenter pieces

Also Published As

Publication number Publication date
RU2077039C1 (en) 1997-04-10

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20070119