绳式防坠器制动过程制动绳冲击行为研究  

Impact Characteristic of Wire Rope During Gage Braking by Rope Parachute Gear

作　　者：曹国华[1] 朱真才[1] 彭维红[1] 陈国安[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2009年第2期244-250,共7页Journal of China University of Mining & Technology

基　　金：江苏省六大人才高峰项目(苏人通[2005]6);高等学校博士学科点专项科研基金项目(20060290505);江苏省高校科研成果产业化推进项目(JH07-022)

摘　　要：为了从理论上解决罐笼因坠落而被绳式防坠器制动过程时的安全可靠性问题,针对防坠器缓冲绳未被抽出及被抽出2种情况,建立了制动绳张紧及松弛力学模型,给出了缓冲绳被抽出的条件、罐笼被抓捕到制动绳处的制动减速度和制动绳动张力表达式.通过现场井口防坠缓冲实验验证了缓冲绳未被抽出情况下制动绳冲击力学模型的正确性,并用制动绳冲击力学模型对达到缓冲绳被抽出的缓冲条件所需的临界速度和制动绳被抓捕处的制动减速度峰值进行了计算.结果表明:临界速度值随着罐笼质量的增大或抓捕点上方制动绳长度(l1)的减小而减小;制动绳被抓捕处的制动减速度峰值随着罐笼坠落速度的增大或l1的减小而变大.合理设计绳式防坠器及评判其制动性能时,须考虑缓冲绳和制动绳不同状态下的冲击行为.In order to theoretically resolve the problem of safety and reliability of the rope parachute gear in the mine hoisting, the mechanical models of the brake-rope＇s states （tensioning and relaxation） were established, considering the buffer rope＇s states of hauling out or not. The expressions for the buffering condition of the rope parachute gear, the braking deceleration peak in cage-caught location and the dynamical tension of the brake-rope were obtained. The experiment results show that the mechanical model under the buffer rope un-hauling out state was correct. The deceleration peaks in the cage-caught locations with different initial falling velocities and distances l1 between the cage and the buffer were calculated respectively. The critical cage falling velocity for the buffering condition of the rope parachute gear decreases with the increasing of cage＇s mass or the decreasing of l1 , and the deceleration peak in the cage-caught location increases with the increasing of cage falling velocity or the decreasing of l1. The impact characteristic of brake-rope under different conditions should be considered, which is helpful for designing the rope parachute gear and evaluating its braking performance.

关 键 词：绳式防坠器 罐笼 制动绳 冲击行为 

分 类 号：TD531[矿业工程—矿山机电]