Simulation and Experimental Study of Clearance Joint Considering Wear Effect
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摘要: 利用Archard磨损模型计算含间隙机构中的轴磨损,并获得磨损轮廓。利用ADAMS软件建模仿真,研究了磨损间隙对系统动力学特征的影响。随着磨损间隙的变化,轴孔中心之间的加速度响应幅值呈逐渐增加趋势,高幅振动位置随磨损间隙的增加发生一定规律性的变化,即磨损程度与系统振动的振幅和振动时间密切相关。最后通过自制的含间隙曲柄滑块试验装置验证了以上结论。
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关键词:
- 含间隙机构 /
- 轴磨损 /
- 规则间隙与磨损间隙 /
- ADAMS /
- 含间隙曲柄滑块试验装置
Abstract: The Archard wear model was used to calculate the journal wear in the mechanism with clearance, and the wear profile of joint was obtained. The dynamic changes caused by the irregular wear clearance caused by journal wear were studied by ADAMS dynamic simulation software. With the change of wear clearance, the response amplitude of acceleration between the center of journal and bearing shows a trend of increasing gradually, and the position of high vibration amplitude changes regularly with the increase of wear clearance, that is, the wear degree is closely related to the amplitude and time of system vibration. Finally, the above conclusions are verified by a self-made experimental device with clearance slider-crank. -
表 1 机构参数表
参数名及单位 数值 曲柄长度l1/mm 80 连杆长度l2/mm 260 孔半径R/mm 10 轴初始半经r/mm 9.9 初始间隙c0/mm 0.1 曲柄转速n/(r·min-1) 215 泊松比 0.269 杨氏模量/GPa 210 载荷F/N 200 表 2 不同磨损周期下轴的磨损数据表
磨损周期 轴最大磨损深度/mm 轴累计最大磨损深度/mm 1 0.195752 0.195752 2 0.195983 0.391735 3 0.195718 0.587453 4 0.195871 0.783325 表 3 试验仪器参数表
仪器名称 参数名称 参数值 东华DH5902动态数据采集仪 数字通道 32 最大取样频率/kHz 100 示指误差 < 0.5% 信号输入模式 IEPE PCB 356A16加速度传感器 量程/g ±50 响应频率/kHz 0.3~6 灵敏度/(mV.g-1) 100 横向灵敏度 < 5% -
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