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螺纹联接是可拆卸联接,应用极其广泛。机器的零件有60%以上具有螺纹,在安装或检修机器时,常花很多时间和很大气力用在松紧螺栓上。大中型水轮发电机组上一个螺纹联接件的重量可达几十、几百公斤,上紧和拆下都很困难,要是碰到螺纹“咬死”,有时还不得不把零件破坏而重新制作,拖延了工期,也造成经济损失。螺纹“咬死”常常在下列情况下发生:
Threaded connection is detachable connection, the application is extremely wide. More than 60% of the parts of the machine are threaded, which often takes a lot of time and effort to install on the turnbuckle when installing or servicing the machine. Large and medium-sized hydro-generating units on a threaded fastener weight up to tens, hundreds of kilograms, tightening and demolition are very difficult, if met the thread “killed” and sometimes have to destroy parts and re-production , Delayed the construction period, but also caused economic losses. Threaded “threads” often occur under the following conditions: