Development of a Design System for a Low Vibration Gearing

低振动齿轮设计系统的开发

基本信息

批准号：
03402028
负责人：
UMEZAWA Kiyohiko
金额：
$ 17.73万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

If a machine is designed to be weighed lighter, it would make greater vibration which makes environmental pollution. Therefore, it is necessary to know the vibration system in detail for further effort to noise and vibration elimination at the designing stage. This investigation is concerned to the elimination of vibration of a helical gearing system by means of experimental observation and numerical calculation. Results are summarized as follows ;When the helix angle is turned to opposite the vibration behavior changes especially in the transversal vibration of the gear. This suggests that we must consider the elastic characteristics of bearing and a gear box for precise understanding. The mode of vibration of gears and shafts have been identified by the use of a laser Doppler velocimetry which can recognize the transversal vibration of a gear shaft at a certain frequency. It has become clear that the vibratory motion of the gear is not necessarily directed along the line of action. It produces circular or elliptic orbit depending upon the frequency. The gear system should be expressed by a multi degree of freedom model including slip action normal to the line of action.Vibration of a gear pair was modeled as a one-degree-of freedom-system and analyzed under the existence of tooth surface deviation at a moderately light load. This has been realized by a consideration of elastic behavior of surface-to-surface contact. In addition, the other analysis in terms of the transfer matrix method was applied to a gear and elastic shaft system condisering excitation force due to meshing. This analysis proved to be an effective method to identify the basic characteristics of the vibration of the gear system.

如果将机器设计为重量更轻，则会产生更大的振动，从而造成环境污染。因此，有必要详细了解振动系统，以进一步努力在设计阶段消除噪声和振动。这项研究涉及通过实验观察和数值计算消除螺旋齿轮系统的振动。结果总结如下；当螺旋角转向相反的振动行为变化时，尤其是在齿轮的横向振动中。这表明我们必须考虑轴承的弹性特征和齿轮盒，以进行精确理解。通过使用激光多普勒速度测定法可以识别齿轮和轴的振动方式，该激光多普勒速度计可以识别以一定频率识别齿轮轴的横向振动。很明显，齿轮的振动运动不一定沿着动作线引导。根据频率，它会产生圆形或椭圆轨道。齿轮系统应通过多个自由度模型表示，包括摩擦行动正常的滑动动作。齿轮对的振动被建模为一级自由系统，并在适度轻载荷以牙齿表面偏差存在下进行分析。通过考虑地表到表面接触的弹性行为，已经实现了这一点。此外，还将其他分析用于转移矩阵方法，将其用于齿轮和弹性轴系统纵容激发力。事实证明，该分析是确定齿轮系统振动的基本特征的有效方法。