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铜绳芯胶带的安全系数m值(本文中均指胶带拉断力与胶带计算最大静张力之比)一般定得较大,主要原因在于其中钢绳芯除了承受静拉伸应力外,还要考虑受起动、制动时的附加动应力、绕经弯曲区段(如滚筒等)时的附加弯曲应力以及硫化接头处的强度削弱等因素。事实上,安全系数的选取还应考虑以下因素: 1.输送对象:如运人时应高于运货; 2.输送机倾角:大倾角应高于缓坡或水平,因为前者万一发生断带时,事故易于扩大,不易修复; 3.单机长度:长度越小,单位时间内胶带绕经滚筒的次数越多,钢绳易于疲劳,故安全系数应略高于长输送机;
Copper rope core tape safety factor m value (in this paper refers to the tape tensile strength and the maximum tensile static tape ratio) generally set larger, mainly because of which the steel cord in addition to static tensile stress, but also Consider factors such as additional dynamic stress at start-up, braking, additional bending stress when passing around a curved section (such as a drum), and weakening of the strength at the vulcanization joint. In fact, the selection of safety factor should also consider the following factors: 1. The object of delivery: If the carrier should be higher than the delivery of goods; 2. Conveyor inclination: a large angle should be higher than the gentle slope or level, because the former in case of broken belt 3. Accident is easy to expand, not easy to repair; 3. Stand-alone length: the shorter the length, the unit of time around the drum through the drum the more steel wire easy to fatigue, so the safety factor should be slightly higher than the long conveyor;