Device and method for testing bolt looseness caused by multi-axis vibration load
A technology of bolt loosening and testing equipment, which is applied in the direction of vibration testing, measuring equipment, testing of mechanical parts, etc., can solve problems such as dwelling, and achieve the effect of simple structure, simple testing method and high experimental reliability
Pending Publication Date: 2021-01-29
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology
In order to explore the reliability of bolted connections, people have carried out a lot of research, but most of the current research is mostly on static analysis and testing, and a small part of the research stops at the influence of unidirectional vibration load on the reliability of bolted connections. superior
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[0023] The present invention will be further described in conjunction with accompanying drawing and embodiment now. see Figure 1 to Figure 4 , the test bench 2 with the through-hole mounting plate is fixed on the base 1, and the test bench 2 is connected with the load-bearing end 4-1 of the test connection plate 4 through the bolt group 3 to be tested, and the load end 4-1 of the test connection plate 4 is 2 There are two rings (ie: ring a4-3 and ring b4-4, such as Figure 4 shown), are respectively connected with the hooks at one end of the two tension springs 5, and the hooks at the other end of the tension springs 5 are respectively connected with the two slider crank mechanisms (namely: the longitudinal slider crank mechanism 6 and the horizontal slider crank mechanism 9) ( like figure 2 and image 3 Shown) in the slider (ie: slider a6-3 and slider b9-3) connected.
[0024] see figure 1 , the installation method of the driving part: one end of the tension spring 5...
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The invention discloses a device and a method for testing bolt looseness caused by multi-axis vibration load. A mounting plate with a through hole is arranged on an experiment table, a support a and asupport b are both inverted L-shaped, a guide rail a is perpendicular to a base and is mounted on the support a, and a guide rail b is horizontal to the base and is mounted on the support b; a tension spring corresponding to the elastic stiffness coefficient is selected according to the stroke of a sliding block a or a sliding block b, and the tension spring is connected with a connection test board; the initial position of a to-be-tested bolt group is recorded, the condition of the to-be-tested bolt group is observed in real time, and the loosening sequence and time of bolts in the to-be-tested bolt group are recorded respectively; and the experimental data are summarized and analyzed to obtain an experimental result. The device can carry out single-direction or multi-direction vibrationload induced bolt loosening test experiments of different bolt groups, has the advantages of simple structure, simple test method, simple parameter adjustment mode, high experiment reliability and the like, and has an important significance and reference value in research on vibration fatigue failure and bolt vibration looseness prevention of the bolt group to be tested.
Description
technical field [0001] The invention relates to a bolt group connection reliability testing technology, in particular to a device and method for testing bolt loosening caused by multi-axis vibration loads. Background technique [0002] With the continuous development of the current automation process, the role of bolt connection in various mechanical equipment is particularly important, and its connection reliability is an important guarantee for the safe operation of mechanical equipment. For the bolted connection, the convenience of disassembly and assembly is its advantage and its disadvantage, because the bolted connection often bears various loads and the mutual coupling between various loads in the working state (for example: static force Load, vibration load and high temperature load, etc.), the role of these external loads has caused a lot of challenges to the reliability of its connection. Among various external loads, the effect of vibration load is one of the imp...
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IPC IPC(8): G01M7/06G01M13/00
CPCG01M7/06G01M7/022G01M7/025G01M13/00Y02E30/30
Inventor 刘文光吴兴意杨洋宫明光
Owner NANCHANG HANGKONG UNIVERSITY