凿岩机自动防卡钎液压控制系统动静态特性分析及改进
发布时间：2018-11-12 09:21
【摘要】：在液压凿岩机进行凿岩作业时,虽然凿岩机具有自动防卡钎功能,但由于存在岩石质地不均、裂隙或熔岩等原因,卡钎事故经常发生。一旦发生卡钎事故,钻头和钎杆将会被卡在孔壁中而无法拔出,只能放弃已经钻进孔内的钎杆和钻头,从而大幅降低凿岩开孔速度和凿岩效率。为提高凿岩机自动防卡钎系统的响应速度和稳定性,降低卡钎率,对其动静态特性进行了分析及改进。主要工作如下:(1)搭建仿真模型。利用AMESim仿真软件对凿岩机防卡钎液压系统进行了建模;根据实际液压元件结构参数及系统工作参数,对模型仿真参数进行了设置;并通过静态试验验证了仿真模型的准确性,为动态特性分析奠定了基础。(2)系统动态特性分析。利用凿岩机自动防卡钎液压系统AMESim仿真模型,对不同工况下的防卡钎阀、推进系统、转钎系统及防卡钎系统动态特性进行了分析。(3)系统动态特性改进。基于仿真模型,探索了影响防卡钎系统动态特性的敏感结构参数;采用多因素正交试验法,分析出了各敏感结构参数对系统动态特性的影响程度,确定了最佳参数组合。(4)实车试验。完成了液压凿岩机实车试验,结果表明,敏感结构参数改进后的防卡钎系统,可有效的提高系统的稳定特性,降低卡钎率。
[Abstract]:Although the drilling machine has the function of preventing the rock drill automatically, the rock drill often occurs because of the uneven texture of the rock, the crack or the lava and so on. Once the drill bit accident occurs, the drill bit and the drill rod will be stuck in the hole wall and cannot be pulled out, so the drill rod and bit already drilled in the hole can only be abandoned, thus greatly reducing the drilling speed and drilling efficiency. In order to improve the response speed and stability of the drill system and reduce the drill bit rate, the dynamic and static characteristics of the drill are analyzed and improved. The main work is as follows: (1) build the simulation model. The hydraulic system of rock drilling machine is modeled by AMESim software, and the simulation parameters are set according to the structure parameters and system working parameters of the actual hydraulic components. The accuracy of the simulation model is verified by static test, which lays a foundation for dynamic characteristic analysis. (2) system dynamic characteristic analysis. Based on the AMESim simulation model of hydraulic system of rock drill, the dynamic characteristics of drill valve, propulsion system, rotary brazing system and anti-drill system under different working conditions are analyzed. (3) the dynamic characteristics of the system are improved. Based on the simulation model, the sensitive structural parameters which affect the dynamic characteristics of the brazing system are explored. By using the method of multi-factor orthogonal test, the influence degree of each sensitive structural parameter on the dynamic characteristic of the system is analyzed, and the best parameter combination is determined. (4) the actual vehicle test. The actual test of hydraulic rock drill has been completed. The results show that the system with improved sensitive structure parameters can effectively improve the stability of the system and reduce the drill bit rate.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU631
本文编号：2326702
[Abstract]:Although the drilling machine has the function of preventing the rock drill automatically, the rock drill often occurs because of the uneven texture of the rock, the crack or the lava and so on. Once the drill bit accident occurs, the drill bit and the drill rod will be stuck in the hole wall and cannot be pulled out, so the drill rod and bit already drilled in the hole can only be abandoned, thus greatly reducing the drilling speed and drilling efficiency. In order to improve the response speed and stability of the drill system and reduce the drill bit rate, the dynamic and static characteristics of the drill are analyzed and improved. The main work is as follows: (1) build the simulation model. The hydraulic system of rock drilling machine is modeled by AMESim software, and the simulation parameters are set according to the structure parameters and system working parameters of the actual hydraulic components. The accuracy of the simulation model is verified by static test, which lays a foundation for dynamic characteristic analysis. (2) system dynamic characteristic analysis. Based on the AMESim simulation model of hydraulic system of rock drill, the dynamic characteristics of drill valve, propulsion system, rotary brazing system and anti-drill system under different working conditions are analyzed. (3) the dynamic characteristics of the system are improved. Based on the simulation model, the sensitive structural parameters which affect the dynamic characteristics of the brazing system are explored. By using the method of multi-factor orthogonal test, the influence degree of each sensitive structural parameter on the dynamic characteristic of the system is analyzed, and the best parameter combination is determined. (4) the actual vehicle test. The actual test of hydraulic rock drill has been completed. The results show that the system with improved sensitive structure parameters can effectively improve the stability of the system and reduce the drill bit rate.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU631
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