摘要
针对矿井提升机受不同载荷作用容易出现过卷、冲击振动、断绳故障等运行安全问题,对矿井提升机钢丝绳后备冗余保护技术展开研究,分析了矿井提升机结构形式和常见故障类型,建立了矿井提升机钢丝绳防振动和冲击数学模型,并基于数学模型的分析研究了提升机钢丝绳振动和冲击控制机理,提出了矿井提升机防冲击、防过卷、防冲击冗余保护装置,利用中间压辊实现两维运动,使得制动过程无极逐步加载,大大提高了提升机钢丝绳运行的平稳性。在某煤矿JKMD-2.8×4提升机进行现场调试和试验,结果表明,在曲轨压辊实现制动力无级加载,当出现断绳安全事故时仅用2.68 s可实现有效制动,提升机钢丝绳最大的速度波动为0.9 mm/s,在运行过程中钢丝绳的波动速度非常小,出现断绳事故时可以实现对钢丝绳的有效抓捕,避免内部能量释放,保证了设备的稳定运行。现场应用验证了方案设计的合理性,取得了满意的应用效果.
In light of mine hoist being prone to the operation safety problems of over-rolling,shock vibration,rope-breaking fault,etc.,the author studied the mine hoist rope backup redundancy protection technology,analyzed the mine hoist structure form and common fault type,and established the mathematical model of mine hoist rope vibration and impact.Based on the mathematical model,the hoist rope vibration and impact control mechanism was explored,and the anti-impact redundant protection device was proposed.The braking process non-cascade loading was achieved using intermediate roller two dimensional motion,greatly improving the operational stability of the steel rope.In order to verify the rationality and application effect of the design scheme,the JKMD-2.84 hoist was tested in a coal mine.The results showed that the braking force was continuously loaded.When the broken rope safety accident occurred,only 2.68s was taken to achieve effective braking,and the maximum speed fluctuation of the braking process was 0.6 m/s.The fluctuation speed of the rope is very small during the operational process,and the effective catch of the rope is realized when it’s broken,thus avoiding the internal energy release and ensuring the safety operation of the equipment.
作者
罗蕾
LUO Lei(Meiyukou Mine,Jinneng Holdings Coal Industry Group,Datong 037000,China)
出处
《陕西煤炭》
2024年第11期130-133,178,共5页
Shaanxi Coal
关键词
矿井提升机
钢丝绳
后备冗余保护
防冲击技术
mine hoist
steel wire rope
backup redundancy protection
impact prevention technology
