爪式矿里跑车防护装置设计与仿真分析

发布时间：2018-04-12 15:04

本文选题：矿车 + 跑车　；参考：《辽宁工程技术大学》2015年硕士论文

【摘要】：矿车是煤矿运输的重要工具之一。由于工作环境恶劣,负载大、使用频率高,牵引机构间存在较大的磨损,使各部件在工作时容易出现失效,经常发生跑车事故。如果出现断绳跑车,很可能出现设备的损坏,运输中断,以及经济损失,严重时还会出现人员的伤亡。为了提升煤矿井下运输的安全性,应根据井下运输的特点设计出一种新型的跑车防护装置。与传统防护装置相比,新型装置应具有动作灵敏、制动时间短、制动可靠等特性。本文基于矿车跑车前后两种状态速度的明显变化,制定出了三种可行的阻车装置方案。并运用模糊综合评判的方法对三种方案的经济性、劳动保护性、可靠性、功能性进行评价,最终确定方案一为最优方案。根据MGC3.3-9型矿车的实际尺寸对方案一进行了系统的设计,计算得到了各部件尺寸通过运用ANSYS Workbench仿真软件,得到了制动爪与枕木瞬态冲击过程中制动爪各危险部位的有效应力与碰撞时间的关系,根据这些关系对制动爪尖进行了优化；得到了制动爪与枕木接触过程中各危险部位所受静应力与接触时间的关系、部件变形量与接触时间的关系,并根据这些曲线和云图对整个制动装置进行了优化。通过运用ADAMS仿真软件,分别得到了矿车发生跑车后车轮转速的变化、制动机构复位弹簧受力、超速感应机构感应弹簧受力、制动爪位移量与跑车时间的关系,通过这些变量关系对装置结构进行了验证与校核。通过以上仿真分析,结果表明,本文所设计机械式阻车装置设计合理、制动时间小于0..4s,具有故障排除后的自复位功能,及即时抓捕功能,能较好的保护发生跑车事故的矿车,对提升煤矿运输的安全性具有重大意义。
[Abstract]:The car is one of the important tools for coal transportation. Due to poor working conditions, large load, high frequency of use, there is a big wear traction mechanism, make the parts easy to appear in the work of failure, frequent car accidents. If the broken rope car is likely to damage the equipment, transportation interruption and economic losses and there will be serious casualties. In order to enhance the safety of coal mine transportation, according to the design characteristics of underground transportation in a protective device. Compared with the traditional protective device, new device should have quick action, short braking time, braking and reliable. The obvious change of two kinds of velocity the mine car and based on the developed three kinds of feasible solutions. The car blocking device and using the method of fuzzy comprehensive evaluation of the economy of the three schemes, labor protection, reliability, function To evaluate the final solution for the optimal solution. According to the actual size of the car type MGC3.3-9 scheme for the system design, calculate the size of the components by using ANSYS Workbench simulation software, the relationship between effective stress and the collision time pawl brake claw and the dangerous areas in the process of transient sleepers according to these relationships, to optimize the brake tip; the dangerous part of the brake claw and the sleeper contact process of the static relationship between the stress and the contact time of the component relation between deformation and contact time, and according to the curves and contours of the whole braking device is optimized. By using ADAMS software, respectively. The change of the wheel speed after tramcar's braking mechanism, reset spring force, speed sensor mechanism induction spring force, and the amount of car brake claw displacement The relationship between these variables through the relationship of device structure is verified and validated. Through simulation analysis, the results show that the designed mechanical vehicle retarding device design is reasonable, the braking time is less than 0..4s, with self reset function after troubleshooting, and instant capture function, can better protect the sport car accident car, which is of great significance to enhance the safety of coal transportation.

【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD553

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