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防松是机器设备一个不可忽视的问题,尤其在矿山机器、航空工业中显得更为重要。本文从螺纹联接产生松脱现象的原因着手,进而提出防松措施。螺纹联接是利用螺纹另件构成的可拆联接,由于螺纹的升角一般为1.5°～3.5°(小于当量摩擦角ρ),联接具有自锁性,再加上螺纹联接支承面上的摩擦力矩的存在,从理论上来说,没有防松螺母的力矩存在的情况下,这种并螺纹联接旋紧后就永不自动松开。但实际情非如此,只有在静载荷下,联接不会自动松况
Prevention is a mechanical equipment can not be ignored, especially in mining machinery, aviation industry is even more important. This article starts from the reason of the loose connection of the thread connection, and then puts forward the measure of preventing the looseness. Threaded connection is the use of threaded parts of the detachable connection, the thread angle is generally 1.5 ° ~ 3.5 ° (less than the equivalent friction angle ρ), the connection has a self-locking, coupled with the thread on the bearing surface of the friction torque In theory there is no loosening nut in the presence of the moment, this thread and screwed together never automatically loose. But the actual situation is not the case, only under static load, the connection will not automatically loose condition