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Testing device for sealing performance of hollow bolts and testing method

A technology of hollow bolts and testing devices, which is applied in fluid tightness testing, measuring devices, testing of machine/structural components, etc., can solve the problem of leakage of joint components, without consideration of the comprehensive influence of pulse, vibration, and temperature changes, and cannot be tested Evaluate the sealing performance of hollow bolts and other issues, to achieve the effect of real sealing performance test and obvious comparison effect

Active Publication Date: 2018-12-18
内蒙古第一机械集团股份有限公司
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Problems solved by technology

The test method (1) is simple in equipment and operation, and can check the influence of joint assembly manufacturing and assembly defects on the seal, but it cannot test the impact of the impact on the joint assembly under liquid dynamic conditions; It is suitable for testing the fatigue damage of the rubber sealing structure, but it is not applicable to the sealing structure of the hollow bolt, and it cannot simulate the leakage problems caused by the loosening of the joint components and structural damage caused by vibration and shock in the actual environment.
[0003] Combining the above two test methods, its main disadvantage is that it does not consider the comprehensive influence of pulse, vibration and temperature changes in the real vehicle environment, and cannot test and evaluate the actual sealing performance of hollow bolts

Method used

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  • Testing device for sealing performance of hollow bolts and testing method

Examples

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Embodiment

[0023] Example: Take the hollow bolt used in the transmission part of an armored vehicle as an example, install the joint assembly and tooling as required, and select 69 times for the test pulse frequency and waveform referring to HB6133-87 "Pulse Test of Hydraulic Hose, Conduit, and Joint Assembly" / min water hammer wave. The pulse peak pressure is set according to the actual working conditions of the hollow bolt. The average pulse pressure of this hollow bolt is 30MPa, and the peak pressure is 45MPa; The pressure selection is 42MPa (the maximum pulse of the hydraulic pulse type seal detection vibration test bench is 50MPa). The selection of vibration frequency and amplitude is consistent with the frequency and amplitude under the actual working condition of the hollow bolt assembly. The hollow bolt selects the working condition with a vibration frequency of 20Hz and an amplitude of 1mm; when the working condition is not clear, refer to GJB 150.16A-2009 "Military Equipment La...

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Abstract

The invention relates to a testing device for the sealing performance of hollow bolts and a testing method. The testing device further comprises a tool, the tool comprises two T-shaped blocks (1), a connecting block (2), a rotating joint (5), a connecting bolt (6), a connecting rod (7) and an additional test block (8). An oil cavity is formed in the center of the connecting block (2), the connecting block (2) is provided with an oil inlet hole (9) and a plurality of mounting holes of tested hollow bolts (3), and the axes of the mounting holes are parallel. The axis of the oil inlet hole is perpendicular to the axes of the mounting holes, the oil inlet hole is connected with a hydraulic station of a test stand through a pipeline, and the mounting holes communicate with the oil cavity. The two T-shaped blocks (1) are fixed to the two vertical surfaces of the connecting block (2) separately, and the additional test block (8) is fixed to the connecting rod (7). According to the testing device for the sealing performance of the hollow bolts and the testing method, testing and evaluating of the actual sealing performance of the hollow bolts under the comprehensive influence conditions ofpulse, vibration and temperature change in the actual vehicle environment are realized.

Description

technical field [0001] The invention belongs to the technical field of sealing performance testing, and in particular relates to a testing device and a testing method for the sealing performance of a hollow bolt, in particular to a testing method for the sealing performance of a hollow bolt in a real vehicle environment. Background technique [0002] At present, the sealing performance testing methods of hollow bolts or similar structures mainly include: (1) pressure-holding test, (2) standard hydraulic pulse test. The test method (1) is simple in equipment and operation, and can check the influence of joint component manufacturing and assembly defects on the seal, but it cannot test the impact on the joint component under liquid dynamic conditions; It is suitable for testing the fatigue damage of the rubber sealing structure, but it is not applicable to the sealing structure of the hollow bolt, and it cannot simulate the leakage problems caused by the loosening of the joint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/00G01M7/02
CPCG01M3/00G01M7/02
Inventor 王磊王卓张建强李军张维王国栋李志俊
Owner 内蒙古第一机械集团股份有限公司
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