矿用手持静力液压平衡式钻机的设计

发布时间：2018-03-21 15:29

本文选题：矿用钻机　切入点：静力平衡液压马达　出处：《安徽理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：由于矿用手持钻机用于煤矿井下及周围介质中有甲烷、煤尘等爆炸性混合气体的环境中,从安全角度考虑,煤电钻存在安全隐患;风煤钻钻孔能力小,且体积大,噪声大,工作产生灰尘大,工作环境恶劣,人工操作风煤钻较为困难。针对以上问题,本论文设计了一种新型手持式矿用钻机设备,该设备以静力平衡液压马达作为动力源,使用行星齿轮轮系增大转速,利用钻头的切割性能进行煤岩石的钻孔。本文对钻机进行主体结构设计及尺寸计算,并设计钻机的整体液压回路,合理布置马达和行星轮系的结构;对马达的主要零件参数进行设计计算,选择行星齿轮的配齿数以及变位系数,校核齿轮接触疲劳强度以及弯曲疲劳强度。对静力平衡液压马达的部分重要零件进行受力以及运动分析,并计算分析马达的流量特性,对曲轴的0初始角度时的受力进行分析,并校核此时曲轴的强度,由于曲轴最主要受到周期旋转的弯矩的作用,所以主要是疲劳强度的校核;对活塞的位移、速度、加速度进行分析,对钻机整体的机械效率进行了计算。建立钻机液压回路,利用液压回路的流量关系使用可压缩流体连续方程推导出流量数学关系,同时对钻机输出端使用扭矩平衡建立数学关系,使用拉氏变换求解液压回路传递函数以及钻机扭矩传递函数。借助Matlab中的Simulink模块建立仿真模型,研究静力平衡液压马达的扭矩特性。用三维建模软件SolidWorks建立钻机的三维模型,使用Ansys中的workbench模块对曲轴零件进行网格划分,并完成曲轴的模态分析,研究曲轴的低阶固有频率,以及振型。防止液压马达曲轴传动发生共振导致疲劳破坏。
[Abstract]:Because the hand-held drilling rig is used in the coal mine and the surrounding medium where there are explosive mixed gases such as methane, coal dust and other explosive gases, from the safety point of view, the coal electric drill has a hidden danger of safety, and the air coal drill has a small drilling capacity, a large volume and a large noise. In order to solve the above problems, a new type of hand-held mining rig equipment is designed, which uses static balancing hydraulic motor as power source. The planetary gear train is used to increase the rotational speed, and the cutting performance of the bit is used to drill the coal and rock. In this paper, the main structure design and size calculation of the drilling rig are carried out, and the integral hydraulic circuit of the drill is designed. Reasonable arrangement of the motor and planetary gear train, design and calculation of the main parts parameters of the motor, selection of the number of teeth of the planetary gear and modification coefficient, Check the contact fatigue strength and bending fatigue strength of gears. Analyze the force and motion of some important parts of the static balancing hydraulic motor, calculate and analyze the flow characteristics of the motor, and analyze the force of the crankshaft at the initial angle of 0. And check the strength of the crankshaft at this time, because the crankshaft is mainly affected by the bending moment of periodic rotation, so it is mainly the checking of fatigue strength; the displacement, velocity and acceleration of the piston are analyzed. The mechanical efficiency of the whole drilling rig is calculated. The hydraulic loop of drilling rig is established, and the mathematical relationship of flow rate is derived by using the compressible fluid continuous equation by using the flow relationship of the hydraulic circuit. At the same time, the mathematical relation of torque balance is established for the output end of drilling rig, and Laplace transform is used to solve the hydraulic circuit transfer function and the torque transfer function of drilling rig. The simulation model is established with the help of Simulink module in Matlab. The torque characteristic of static balancing hydraulic motor is studied. The 3D model of drilling rig is established by SolidWorks, and the crankshaft parts are meshed by workbench module in Ansys. The modal analysis of crankshaft is completed, and the low order natural frequency of crankshaft is studied. And vibration mode. Prevent hydraulic motor crankshaft drive from resonance leading to fatigue damage.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD421

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