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Hub airtightness detection method and system

A technology of air tightness detection and wheel hub, which is applied in fluid tightness testing, liquid tightness measurement using liquid/vacuum degree, and detecting the appearance of fluid at the leakage point, etc., can solve the problem of supply difficulty and the high price of helium , high cost of wheel hub air tightness testing, etc., to achieve the effect of low cost and easy access

Pending Publication Date: 2020-10-16
CITIC DICASTAL
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  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing wheel hub air tightness test uses helium as tracer gas and cooperates with helium mass spectrometer to detect

Method used

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  • Hub airtightness detection method and system
  • Hub airtightness detection method and system
  • Hub airtightness detection method and system

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Embodiment 1

[0034] Such as figure 1 As shown in, the present embodiment 1 provides a wheel hub air tightness detection system, including a sealing cover 1, an upper gasket 2, a lower gasket 3, a booster cylinder 4, a standard leak hole 5, and a mass spectrometer detection valve 7 , Hydrogen-detectable mass spectrometer 8, mass spectrometer backing pump 9, mixed gas tank 10, tracer gas valve 11, inner chamber pressure gauge 14, inner chamber vacuum valve 15, inner chamber vacuum pump 16, outer chamber pressure gauge 17. External cavity vacuum valve 18, external cavity vacuum pump 19, gas recovery unit 20, thermal conductivity hydrogen concentration meter 26, recovery intake valve 27, concentration detection valve 28, trace oxygen removal device 29.

[0035] The wheel hub 25 is placed in the sealing cover 1, the upper gasket 2 can be driven by the piston rod of the booster cylinder 4 to compress the front of the wheel hub 25, and the lower gasket 3 can compress and seal the back of the whee...

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Abstract

The invention belongs to the technical field of hub quality detection. The invention provides a hub airtightness detection method and system. A mixed gas of hydrogen and nitrogen is used as a tracer gas, the volume concentration of hydrogen is not higher than 5%, and the rest is nitrogen, so that the leak detection system and method have the characteristics that the detection gas is easy to obtain, the cost is low, the detection principle is strictly followed, and the test proves that the leak detection system and method have the same detection accuracy as helium.

Description

technical field [0001] The present application relates to the technical field of wheel hub quality detection, and in particular to a wheel hub airtightness detection method and system. Background technique [0002] The existing wheel hub air tightness test uses helium as tracer gas, and helium mass spectrometer is used to detect leaked helium gas. However, helium is expensive and difficult to supply, resulting in high cost of wheel hub air tightness test. Contents of the invention [0003] The embodiment of the present application provides a wheel hub airtightness detection method and system, which can solve the problems in the background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] In the first aspect, a method for detecting the airtightness of a wheel hub is provided, which is characterized in that a mixed gas of hydrogen and nitrogen is used as a tracer gas, wherein the volume concentration...

Claims

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Application Information

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IPC IPC(8): G01M3/20
CPCG01M3/202G01M3/205
Inventor 阿拉腾熊国源杨小禹李志广刘兴华孙汉宝唐德彬张东辉王春伟吕金旗李思明朱志华
Owner CITIC DICASTAL