防松胶对螺纹连接预紧力影响的试验研究

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摘要螺纹连接件由于其显著的优点被广泛的应用在空间光学遥感器结构件的装配中，保证螺纹连接结构可靠性的关键是选用合适的紧固件并控制其预紧力。在螺纹上涂防松胶是当前常用的防松手段，但在工程应用中发现，螺纹在涂胶前后，或对比涂不同种类的防松胶，在施加同样的拧紧力矩的情况下，螺栓上产生的预紧力都有较大差别。本文针对空间光学遥感器装配中常用的防松胶对螺纹连接预紧力的影响进行了定量的试验研究，结果表明：在螺纹上涂硅橡胶D04（L），与不涂胶相比，同样的拧紧力矩在螺栓上产生的预紧力要减小50%~70%；而在螺纹上涂厌氧胶乐泰243，同样的拧紧力矩在螺栓上产生的预紧力要增大46%~98%。本文的研究表明，首先，某个种类的防松胶在使用前，要对这种防松胶对螺纹连接预紧力的影响进行定量的试验测试，并根据测试结果调整在螺栓上施加的拧紧力矩，以达到预期的螺栓预紧力；其次，在需要对预紧力精确控制的连接区域，力矩扳手紧固的方式已经不再适用。

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	董得义
	李志来
	杨利伟
	徐宏

关键词 ：空间光学遥感器, 螺纹连接, 预紧力, 防松胶

Abstract：As screw joint structure is a basic device mostly used in space optical remote sensor assemble, because of its outstanding advantages. Choosing the fitting fasteners and controlling the preload is the key to ensure the reliability of the screw joint structure. Plaster the locking adhesive on the screw thread during the course of the assembling has been the mostly means to prevent the screw joint get loose nowadays. But in the course of the engineering application, the preload will be change dramatically after plaster the locking adhesive on the screw threads or plaster different locking adhesive, although at he same torque. In this paper, the quantification influence by the frequently-used locking adhesive in the optical remote sensor assembling was researched. The experiment results indicate that plaster the silastic(D04(L)) on the screw thread in the assembling, the preload will decrease 50%~70% by comparison with no locking adhesive at the same torque. But plaster the anaerobic adhesive(LOTTIE243),the preload will increase 46%~98%.According to the study results, the influence to the preload has to be tested is essential before using this kind of locking adhesive, then the torque should be adjusting according to the test results. Secondary, the fastening way by the torque spanner is unfit for the connection situation which the preload should be accurately controlled.

Key words： Space optical remote sensor Screw thread connection Preload Locking adhesive

收稿日期: 2014-11-12 出版日期: 2015-11-25

引用本文:

董得义，李志来，杨利伟，徐宏. 防松胶对螺纹连接预紧力影响的试验研究[J]. 振动与冲击, 2015, 34(22): 121-124.
DONG De-yi, LI Zhi-lai, YANG Li-wei, XU Hong. Experiment study of the influence to the preload on the screw thread connection caused by the locking adhesive. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(22): 121-124.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I22/121

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