一、刮板输送机合理预张力的意义刮板输送机在水平直线铺设、静止状态下,链条的张力称为刮板输送机的预张力。合理的预张力是保证输送机正常运行的重要条件之一。预张力过大,链条和链轮啮合过紧,使链条磨损增加,链条振动振幅加大,加速链条疲劳,甚至造成断链事故;同时预张力过大,使起动负荷增加,对输送机起动不利。预张力过小,造成输送机最小张力点处悬松链过多,引起掉链、跳链,甚至断链事故。为保证输送机正常生产,英国煤炭科学院(MRDE)规定了刮板输送机预张力的一般标准,实行了输送机预张力的定期监 First, the meaning of reasonable pre-tension scraper conveyor Scraper conveyor laying in the horizontal straight, static state, the tension of the chain scraper conveyor called the pre-tension. Reasonable pre-tension conveyor is to ensure the normal operation of one of the important conditions. Pre-tension is too large, the chain and the sprocket meshing too tight, so that the chain increased wear and tear, the chain vibration amplitude increases to speed up the chain fatigue, or even cause chain scission accidents; pre-tension too large, so that the starting load is negative, the conveyor start detrimental . Pre-tension is too small, resulting in the conveyor at the point of the minimum tension hanging loose chain too much, causing the chain, chain, and even broken chain accident. In order to ensure the normal conveyor production, the British Academy of Coal Mine (MRDE) provides a general standard scraper conveyor pre-tension, the implementation of a regular pre-tension conveyor