大型牙轮钻机钻架设计及仿真分析研究
发布时间：2018-08-04 21:23
【摘要】：牙轮钻机是露天采矿的重要设备,其工作效率直接影响采矿产量。钻架作为牙轮钻机的重要工作装置,主要用于安装加压回转机构、送杆机构和其它辅助机构,保障钻机的正常工作。钻架在工作过程中要承受复杂的载荷,还要承受各种冲击和振动,因此钻架结构需要有足够的弯曲强度、良好的扭转强度和一定的抗疲劳能力。本文结合课题要求,对钻架结构进行了研究,本文的主要研究内容如下:根据钻架的设计要求,通过综合对比不同牙轮钻机钻架的结构,确定了钻架设计方案。根据已有送杆机构和加压提升机构的形式和尺寸,对钻架内部空间进行设计,并装配到钻架上,验证机构是否发生干涉。按照钻架的实际起升情况,对起落机构进行分析计算,确定起升力的大小和起升机构的行程。根据实际钻孔环境,确定了牙轮钻机工作参数。根据设计的钻架结构,对钻架模型进行简化,建立力学和有限元模型。根据钻架的实际工作环境,确定钻架的四种典型工况,对钻架在多工况下进行整体受力分析和静力学有限元分析,分析钻架的变形和应力分布情况,校核钻架的强度和刚度。根据有限元分析结果,确定钻架工作的危险工况,减少设计中的计算量,为后续优化设计提供参考。钻架是重要的工作装置,为进一步分析其动力特性,对钻架进行模态分析计算,得到前十阶频率和固有振型。确定钻架的主要振源,计算振源的频率,检查振源是否引起钻架共振,确定引起钻架振动的频率范围。在振动频率范围内,对钻架进行谐响应振动分析,获得结构的幅频响应曲线和动应力响应规律,分析振动对钻架的影响。为钻机整体设计和钻架结构优化设计提供依据。在静力学分析的基础上,对钻架卡钻过程进行分析,对钻架卡钻过程中的受力情况进行了研究,得到钻架的瞬态响应结果。根据卡钻冲击的计算结果,校核钻架的强度和刚度,分析钻架的动力响应规律。将瞬态动力学分析结果与静力学结果进行对比分析。确定钻架工作状态下的动载荷系数,为后续优化设计提供参考。
[Abstract]:Rotary drill is an important equipment in open-pit mining, and its working efficiency directly affects mining output. As an important working device of rotary drilling rig, drill frame is mainly used to install pressurized rotary mechanism, rod feeding mechanism and other auxiliary mechanisms to ensure the normal operation of drilling rig. The drill frame has to bear complicated load and all kinds of shock and vibration in the working process, so the structure of drill frame should have enough bending strength, good torsional strength and certain anti-fatigue ability. The main contents of this paper are as follows: according to the design requirements of drilling frame, the design scheme of drilling frame is determined by comparing the structure of drilling frame of different wheel drilling machine. According to the form and size of the rod feeding mechanism and the pressure lifting mechanism, the internal space of the drill frame is designed and assembled on the drill frame to verify the interference of the mechanism. According to the actual lifting of the drill frame, the lifting mechanism is analyzed and calculated to determine the lifting force and the stroke of the lifting mechanism. According to the actual drilling environment, the working parameters of the rotary drill are determined. According to the designed drill frame structure, the drilling frame model is simplified and the mechanics and finite element models are established. According to the actual working environment of the drill frame, four typical working conditions of the drill frame are determined. The integral force analysis and static finite element analysis of the drill frame under multiple working conditions are carried out, the deformation and stress distribution of the drill frame are analyzed, and the strength and stiffness of the drill frame are checked. According to the results of finite element analysis, the dangerous working conditions of drilling frame are determined, and the calculation amount in design is reduced, which provides a reference for further optimization design. The drill frame is an important working device. In order to further analyze its dynamic characteristics, the first ten frequencies and natural modes of the drill frame are obtained by modal analysis and calculation. The main vibration source of the drill frame is determined, the frequency of the vibration source is calculated, and the frequency range of the vibration source is determined by checking whether the vibration source causes the vibration of the drill frame. In the range of vibration frequency, the harmonic response of the drill frame is analyzed, the amplitude frequency response curve and the dynamic stress response law of the structure are obtained, and the influence of vibration on the drill frame is analyzed. It provides the basis for the whole design of drilling rig and the optimum design of drilling frame structure. On the basis of static analysis, the drilling process of drill frame is analyzed, and the stress of drill frame is studied, and the transient response of drill frame is obtained. The strength and stiffness of the drill frame are checked and the dynamic response law of the drill frame is analyzed according to the calculation results. The results of transient dynamics analysis are compared with those of statics. The dynamic load coefficient under the working state of the drill frame is determined to provide a reference for the subsequent optimization design.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD422.1
本文编号：2165196
[Abstract]:Rotary drill is an important equipment in open-pit mining, and its working efficiency directly affects mining output. As an important working device of rotary drilling rig, drill frame is mainly used to install pressurized rotary mechanism, rod feeding mechanism and other auxiliary mechanisms to ensure the normal operation of drilling rig. The drill frame has to bear complicated load and all kinds of shock and vibration in the working process, so the structure of drill frame should have enough bending strength, good torsional strength and certain anti-fatigue ability. The main contents of this paper are as follows: according to the design requirements of drilling frame, the design scheme of drilling frame is determined by comparing the structure of drilling frame of different wheel drilling machine. According to the form and size of the rod feeding mechanism and the pressure lifting mechanism, the internal space of the drill frame is designed and assembled on the drill frame to verify the interference of the mechanism. According to the actual lifting of the drill frame, the lifting mechanism is analyzed and calculated to determine the lifting force and the stroke of the lifting mechanism. According to the actual drilling environment, the working parameters of the rotary drill are determined. According to the designed drill frame structure, the drilling frame model is simplified and the mechanics and finite element models are established. According to the actual working environment of the drill frame, four typical working conditions of the drill frame are determined. The integral force analysis and static finite element analysis of the drill frame under multiple working conditions are carried out, the deformation and stress distribution of the drill frame are analyzed, and the strength and stiffness of the drill frame are checked. According to the results of finite element analysis, the dangerous working conditions of drilling frame are determined, and the calculation amount in design is reduced, which provides a reference for further optimization design. The drill frame is an important working device. In order to further analyze its dynamic characteristics, the first ten frequencies and natural modes of the drill frame are obtained by modal analysis and calculation. The main vibration source of the drill frame is determined, the frequency of the vibration source is calculated, and the frequency range of the vibration source is determined by checking whether the vibration source causes the vibration of the drill frame. In the range of vibration frequency, the harmonic response of the drill frame is analyzed, the amplitude frequency response curve and the dynamic stress response law of the structure are obtained, and the influence of vibration on the drill frame is analyzed. It provides the basis for the whole design of drilling rig and the optimum design of drilling frame structure. On the basis of static analysis, the drilling process of drill frame is analyzed, and the stress of drill frame is studied, and the transient response of drill frame is obtained. The strength and stiffness of the drill frame are checked and the dynamic response law of the drill frame is analyzed according to the calculation results. The results of transient dynamics analysis are compared with those of statics. The dynamic load coefficient under the working state of the drill frame is determined to provide a reference for the subsequent optimization design.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD422.1
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