内容介绍
本文档由会员 wanli1988go 发布
齿轮传动是机械设备中最常见的传动方式,现代机械对齿轮传动的要求日益提高,即要求齿轮能在高速、重载、特殊介质等恶劣环境条件下工作,又要求齿轮装置具有较高的平稳性、高可靠性和结构紧凑等良好的工作性能,由此使得齿轮发生故障的因素越来越多,而齿轮异常又是诱发机器故障的重要因素。因此,齿轮故障诊断技术的应用研究是非常重要的。
齿轮由于制造、操作、维护以及齿轮材料、热处理、运行状态等因素不同,产生异常的形式也不同,齿轮常见的故障形式有如下几种:
1、齿的断裂
齿的断裂分疲劳断裂和过负荷断裂。疲劳断裂是齿轮重复受载后由于应力集中产生的。当齿轮副进入啮合状态时,最危险的瞬间是接触点位于齿轮的顶部,此时在齿根部产生的弯曲应力为最大,存在较严重的应力集中,当载荷超过设计值,或者齿轮在周期性交变载荷作用下,经过一定的载荷循环后,齿的根部有可能产生裂纹。齿轮继续工作,裂纹向根部纵深发展,当裂纹削弱的根部不腀@惺芡淝ακ保菥头⑸狭选Ⅻbr> Machinery and equipment in the gear transmission is the most common transmission mode,and the increasing demand gear of the modern machinery .The gear is not only required in high-speed, heavy, special media, and work in other harsh environmental conditions, but also required a high stable , high reliability and compact structure, good performance, so arouse more and more factors of failure. The gear fault is an important factor in inducing mechanical fault.Therefore, the gear fault diagnosis technology research is very important.
Gear because of different factors such as manufacturing, operation, maintenance and gear material, heat treatment,running state and so on , will produce different of abnormal forms.The common faults in gear have the following categories: