【作者】 章易程；

【导师】 田红旗；

【作者基本信息】 中南大学 ， 载运工具运用工程， 2011， 博士

【摘要】 为了实现齿轮传动的绿色制造、提高齿轮的传动性能,本文针对齿轮传动的乏油现象,在乏油工况、乏油机理、乏油磨损、改善乏油的供油方法及其载运齿轮传动工程应用等方面进行了摩擦学研究。论文主要创新工作如下：(1)基于齿轮的啮合过程分析了表征齿轮副工况的两个基本要素——相对运动与载荷。为便于研究齿轮传动设计参数对两理论齿廓相对运动的影响,推导了采用传动比、理论啮合线长度与曲率半径表示的相对滑动率的计算公式；通过随机函数模拟齿轮的制造误差,采用弹簧模型建立了考虑制造误差的啮合刚度与齿间载荷分配率的计算方法。以SS8机车齿轮为例的计算表明：综合误差使得双齿轮副啮合刚度大小在无误差值的啮合刚度值下方波动,但不会超过单齿轮副的啮合刚度值；综合误差使得齿间载荷分配率沿着无制造误差的载荷分配率曲线而上下波动。(2)从供需关系入手进行了齿轮副乏油的研究,提出了齿轮副的乏油机理：接触区有效供油量不足实际的需求量将导致乏油；并进一步提出了有效供应量是受齿轮的自供油能力与外设供油能力影响的判据。首先,基于弹流润滑理论与散热原理分别推导了齿轮传动的润滑供油需求量与冷却需求量的计算公式；然后,从载荷与速度两方面出发研究了齿轮基本参数对齿轮自供油能力的影响；最后,基于供油效率研究了供油方位与齿轮的设计结构等对外设供油能力的影响,为高速、重载下改善齿轮乏油传动提供了有效的措施。(3)针对现有磨损计算的理论依据不充分的问题,提出了高副摩擦功原理的磨损计算模型,该模型从能量的角度高度概括地反映了滑动高副摩擦磨损的规律,理论依据可靠,且计算简单实用,适应于高副摩擦磨损的动态仿真分析；并开发了使用方便、计算全面、结果可靠的齿廓磨损仿真软件,以SS8型机车牵引齿轮为例进行了仿真计算与分析,提出了齿轮耐磨设计与维护的相关措施。(4)针对高速、重载立式齿轮传动在传统润滑供油方法下容易造成供油量不足而导致乏油的情况,提出了具有自主知识产权的齿轮径向自吸流体润滑方法,并以螺杆泵为供油动力源进行了供油能力的理论分析以及实验研究,计算表明：螺杆泵工作容积主要受齿轮转速与齿轮载荷的限制,冷却散热对螺杆泵工作容积的影响与转速无关,螺杆泵工作容积应该按啮合线上最大供油量进行设计；通过实验验证了供油不足将导致乏油的理论分析。本文具有明显的理论价值、实用价值,对于基于绿色制造的齿轮摩擦学设计具有明显的指导意义。更多还原

【Abstract】 In order to advance the green manufacturing of gear transmission and improve the transmission performances of gear, a series studies on gear working condition, starved-oil mechanism, wear, oil supply and engineering application of gear in transportation tool are carried in this paper against the starved-oil phenomenon of gear transmission.(1) To describe the working condition of gear pair, two basic factors, i.e. relative motion and load, are analyzed based on the gear engagement process. The relative sliding ratio expression, which is described by trasmission ratio, theoretical action line length and curvature radius, is developed for a convenient research on the influences of gear design parameters on the relative motion of two theoretical tooth profiles. Also, the manufacturing error of gear is simulated by means of a random function and the computation methods of the tooth engagement stiffness and the ratio of load distribution between theeth are both established based on a spring model after considering the manufacturing error. Taking SS8 locomotive gear as an example, the relative computation results show that the double tooth engagement stiffness value of the gear with comprhensive manufacturing error fluctuates between double tooth eagagement stiffness value and single tooth engagement stiffness value of the gear without comprhensive manufacturing error while the ratio of load distribution between teeth also fluctuates along that value of gear without comprhensive manufacturing error.(2) After the study on starved-oil phenomenon of gear pair is completed based on supply-demand relationship, starved-oil mechanism of gear pair is suggested that the starved-oil phenomenon will happen when the effective oil supply quantity is less than practical demend quantity; furtherly, it is pointed that the effective oil supply quantity is decided by the gear self-oil-supply ability and peripheral-oil-supply ability. Firstly, the computation expressions of the lubrication oil supply quantity and cooling oil supply quantity are both deduced respectively based on elastic dynamic lubrication theory and cooling principle. The influences of gear basic parameters are studied on the gear self-oil-supply ability are discussed respectively from two different aspects of load and speed. The influences of gear sturucture and relative location on peripheral-oil-supply ability are also discussed based on the supply efficiency. Some relative effective approaches are provided against starved-oil phenomenon of high speed gear or heavy load gear.(3) A computation model of higher pair friction work principle is suggested against the insufficient theoretical evidence usually used for current wear computation. That model can very resumptively express the friction wear law of sliding higher pair from the point of the energy view, and is suitable to the dynamic friction wear simulation of higher pair because of reliable theory evidence, simplification and practicality. A mathematical simulation software of tooth profile wear with convenience, overall factors and reliable results is developed. The wear of SS8 locomotive traction gear is computated and analyzed as an example. As a result, some measures relevant to the maintenance and design against gear wear are suggested.(4) A method of gear radial self-inhall liquid lubrication with self-owned intellectual property rights is introduced for the upright gear transmission with high speed and heavy load which is prone to starved-oil lubrication due to insufficient oil supply quantity under traditional oil supply mode. Some theoretical and experiment researches on oil supply of gear by means of screw pump, which is taken as an impetus, is made. It indicates after computating that the working cubage of screw pump is confined to both rotating speed and load while the influence of cooling on the working cubage has nothing to do with the rotating speed, and the working cubage should be designed according to maximum oil supply quantity along the action line of gear transmission, also the theory, the insufficient oil supply quantity will result in the starved oil state, is verified by experiment.Therefore, this paper manifests obvious theoritical value, practical value, and distinct guiding significance for tribology design of gear tansmission based on green manufacturing.更多还原