Simulation Analysis on Impact Characteristics of Swing Torsional Punching Tool
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摘要: 针对现有液动式、回转式扭冲工具存在的不足，提出一种集成于螺杆马达的摆动扭冲工具，利用转子公转驱动摆锤实现周期性扭转冲击。对冲击模块进行运动分析与冲击特性仿真，得到了接触刚度、偏心距、转子转速、头数对转子反扭矩与冲击模块输出扭矩峰值的影响规律。引入冲击扭矩峰值波动率和平均冲击扭矩峰值来评价转子所受反扭矩大小与冲击模块输出扭矩峰值平稳性。结果表明：影响参数取优解时，作用在转子上的反扭矩小；冲击模块输出扭矩峰值平稳，有效辅助破岩冲击力矩大。Abstract: Aiming at the shortcomings of the existing hydraulic and rotary torsion tools, a swinging and twisting tool integrated in the screw motor is proposed to realize the cyclic torsional impact by the revolution of the motor rotor. The motion analysis and impact characteristics of the tool impact module are simulated, and the influences of contact stiffness, eccentricity, rotor speed, number of screw heads on rotor counter-torque and peak value of output-assisted rock breaking impact are obtained. The peak value of the impact torque and the peak value of the average impact torque are introduced to evaluate the magnitude of the reverse torque received by the rotor and the peak stability of the impact assembly output assisted rock breaking torque. The results show that the peak value of the impact torque and the peak value of the average impact torque are smaller at the contact point between the rotor and the pendulum. The counter-torque of the rotor is smaller, which helps to improve the life of the rotor. The peak of the impact torque is at the contact between the pendulum and the loose-leaf ring. The smaller the rate and the larger the average impact torque peak, the smoother the peak output torque of the impact assembly and effective rock breaking impact torque becomes larger.
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Key words:
- swing torsional punching /
- impact characteristics /
- peak value /
- output torque /
- stiffness
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表 1 三维模型参数
参数名称 数值及单位 转子半径R 39 mm 椭圆长半径a 47 mm 椭圆长半径b 45 mm 摆锤泊松比μ1 0.295 摆锤弹性模量E1 2.09×105 N/mm2 活页环泊松比μ2 0.28 活页环弹性模量E2 2.12×105 N/mm2 转子泊松比μ3 0.286 转子弹性模量E3 2.13×105 N/mm2 
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表 2 冲击力矩峰值影响参数初始值
参数名称 数值及单位 接触刚度K1 7.0×105 N/mm 接触刚度K2 1.0×105 N/mm 转子偏心距e 6 mm 转速n 150 r/min 头数N 5
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表 3 改变K1, C1、C2处冲击扭矩峰值波动率
K1/(N·mm-1) W1 W2 1.0×104 5.52 2.92 5.0×104 8.88 3.25 1.0×105 12.38 4.37 7.0×105 7.25 2.44
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表 4 改变K2时, C1、C2处冲击扭矩峰值波动率
K2/(N·mm-1) W1 W2 1.0×104 5.52 2.92 2.0×104 8.88 3.25 5.0×104 12.38 4.37 1.0×105 7.25 2.44
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表 6 不同e值时C2的Ta2与W2
e/mm Ta2/(N·mm) W2 6 321.53 0.03 6.5 722.42 0.01 7 78.04 18.13 7.5 7.5 20.67 8 33.13 49.06
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表 7 不同ng时C1、C2的Ta与W
e/mm ng/(r·min-1) Ta1/(N·m) W1 Ta2/(N·m) W2 6 600 52.98 1.36 417.60 0.02 750 19.04 3.18 321.53 0.03 900 18.03 6.70 314.46 2.98 1 200 15.96 8.75 0 / 6.5 600 15.10 2.28 248.73 3.15 750 69.34 2.63 722.42 0.01 900 43.04 7.62 470.96 2.95 1 200 34.38 8.45 0 /
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