基于热分析的齿轮传递误差的计算和共振可靠性分析

发布时间：2018-06-28 14:22

本文选题：齿轮 + 热分析　；参考：《东北大学》2012年硕士论文

【摘要】：齿轮是机械传动系统中的重要组成部分,具有传动比精确,工作可靠、效率高,使用功率、速度范围广等突出优点,在现代工业进程中有着举足轻重的地位,广泛应用于汽车、航空航天、冶金、制药、化工等行业。然而,齿轮在内、外激励的共同作用下不可避免地会发生振动,产生噪声,影响其寿命和可靠性。随着齿轮转速和载荷的增加,齿轮的振动也会越来越严重。工程实际中,齿轮的许多破坏都和振动有关,其中共振产生的破坏尤其严重。温度的变化会引起齿轮热变形,造成齿形偏差,在齿形偏差和弹性变形等因素的作用下,齿轮系统会产生传递误差,传递误差是齿轮振动的主要激励源之一。同时,齿轮温度的变化会引起材料性能发生变化,进而会引起固有频率的变化,另外,齿轮内部由不均匀的温度场形成的热应力也会对其固有频率产生影响,从而会对齿轮的共振可靠性产生影响。因此,基于热分析的齿轮传递误差的计算和共振可靠性分析更加接近实际工作情况,是有意义的。本文以直齿圆柱齿轮为研究对象,利用大型通用有限元分析软件ANSYS11.0进行上述分析,主要内容分为四个部分：第一部分根据移动热源的方法,对齿轮旋转过程中的瞬态温度场进行了仿真；第二部分基于齿轮的本体温度场,对齿轮的热变形进行了分析,计算了齿轮的非渐开线误差,讨论了热变形对齿轮振动的影响,重点进行了考虑热变形时齿轮传递误差的计算；第三部分在考虑温度场的前提下进行齿轮模态分析,分析了温度场对齿轮模态的影响；第四部分在考虑温度场的前提下进行了齿轮共振可靠性和可靠性灵敏度的分析。
[Abstract]:Gear is an important part of mechanical transmission system. It has many outstanding advantages such as accurate transmission ratio, reliable work, high efficiency, wide range of power and speed. It has a pivotal position in modern industrial process and is widely used in automobiles. Aerospace, metallurgy, pharmaceutical, chemical and other industries. However, the vibration and noise will inevitably occur under the combined action of the external excitation and the gear, which will affect the life and reliability of the gear. With the increase of gear speed and load, gear vibration will become more and more serious. In engineering practice, many failures of gears are related to vibration, especially those caused by resonance. The change of temperature will cause the gear thermal deformation and cause the tooth shape deviation. Under the action of tooth shape deviation and elastic deformation, the transmission error of gear system will be produced, which is one of the main excitation sources of gear vibration. At the same time, the change of the temperature of the gear will cause the change of the material properties and then the change of the natural frequency. In addition, the thermal stress formed by the non-uniform temperature field in the gear will also have an effect on the inherent frequency of the gear. This will affect the resonance reliability of the gear. Therefore, the calculation of gear transmission error and resonance reliability analysis based on thermal analysis are closer to the actual working conditions and are meaningful. In this paper, the spur gear is taken as the research object, and the above analysis is carried out by using ANSYS11.0. The main contents are divided into four parts: the first part is based on the method of moving heat source. The transient temperature field during gear rotation is simulated. In the second part, based on the temperature field of gear, the thermal deformation of gear is analyzed, the non-involute error of gear is calculated, and the influence of thermal deformation on gear vibration is discussed. In the third part, the gear modal analysis is carried out under the premise of considering the temperature field, and the influence of the temperature field on the gear modal is analyzed. In the fourth part, the resonance reliability and reliability sensitivity of gears are analyzed considering the temperature field.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

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