共查询到20条相似文献,搜索用时 109 毫秒
1.
传动轴振动和噪声的原因主要是万向节严重磨损、传动轴弯曲或扭转变形、传动轴不平衡或连接部件松动、变速器输出轴花键齿磨损严重、中间支承齿轮磨损或中间支承松动。排除方法是,首先检查万向节磨损情况,对于普通十字轴万向节,如果磨损严重应更换十字轴 相似文献
2.
万向节十字轴作为是汽车传动设备上的一个零部件,对整个传动系统都起着至关重要的作用。当车辆自身负荷变化后,尤其是当车辆在路况不好时行驶会产生较强的跳动及颠簸等因素,这些情况均会引起变速器输出轴与驱动桥主减速器输入轴之间的夹角和距离发生变化,而万向节十字轴则解决了这个以变应变的问题。同时也正是由于万向节十字轴的这种核心作用致使其极易产生裂纹、剥落、甚至断裂等失效情况,从而降低了其自身的疲劳寿命。本文就万向节十字轴失效情况展开讨论并针对影响其疲劳寿命的因素进行简单分析,同时也为相关从业人员提供一些参考。 相似文献
3.
4.
5.
6.
7.
万向节十字轴应用新车型验证时发生早期失效,利用有限元分析软件对该万向节十字轴进行分析优化设计,实现提高其性能的同时,大大缩短了设计开发周期,节约了重复试验的周期与成本. 相似文献
8.
重载十字轴式万向节是轧钢机主传动系统的核心部件,一旦重载十字轴式万向节出现问题,会使整个主传动系统受到影响,会使轧钢机不能正常生产,对企业造成经济损失。所以,对轧钢机主传动系统中的重载十字轴式万向节的技术研究非常重要。本文主要对十字轴式万向节的关键技术进行重点的阐述,对万向节的运动学以及结构进行分析。 相似文献
9.
10.
分别对单、双十字轴式万向节进行了运动分析,确定了转向系统输出轴产生转矩波动的影响因素.针对某车型转向系统的双万向节传动,利用RecurDyn软件建立了双十字轴式万向节的参数化模型,将各个可以变动的变量和坐标参数化并设定为设计变量,结合空间双万向节传动的等速条件,以输出轴的转矩波动达到最小为目标进行优化设计.最终获得了最... 相似文献
11.
Jian-Wei Lu Gong-Cheng Wang Hao Chen Alexander F. Vakakis Lawrence A. Bergman 《Journal of Mechanical Science and Technology》2013,27(11):3201-3205
Cross shaft type universal joint is widely used in ground vehicles to transfer torque between two intersecting axes, and its transmission feature can make a great contribution to NVH performance of the vehicle. We looked at the assembling clearance at cross shaft neck, and presented a dynamic model of cross shaft type universal joint with clearance at cross shaft neck. Two-state model is applied to describe the contact force between the cross shaft and driving joint fork based on Hertz theorem, and lumped mass method is applied to build up the dynamic model of the universal joint. Based on this model, numerical analysis is carried out to discuss the transmission feature of the universal joint with clearance at cross shaft neck, and the influence of clearance on the dynamic behavior of the system is evaluated with numerical results based on time history, power spectrum, and phase portrait. The method and conclusions presented are helpful to improvement of the transmission feature of cross shaft type universal joint. 相似文献
12.
双万向传动中间轴在传动过程中,伴有速度波动,为减少速度波动引起的动载荷影响,设计时要在传递转矩一定的情况下,使中间轴质量最轻。讨论了中间轴设计过程中的模糊因素,建立了以截面积最小的模糊优化设计模型,运用模糊理论和方法获得最优解。 相似文献
13.
十字万向轴对于螺杆钻具的扭矩与转速传递具有重要作用,然而十字万向轴的运动磨损使得传递效率大大降低。为探究十字万向轴啮合面的运动规律与防磨合金块的磨损规律,建立十字万向轴多体运动和合金块体积磨损量计算的联合仿真物理模型;依据赫兹接触理论和Archard磨损理论对仿真模型的接触边界条件进行设定,对磨损条件进行定义,研究共轭运动副啮合面之间的运动规律与接触力的变化规律;以多体运动仿真求解所得啮合面的运动路径和接触力峰值作为防磨合金块磨损分析的边界条件,研究不同结构形态对防磨合金块体积磨损量的影响规律。结果表明:当运动啮合稳定后,啮合面会产生沿着切向与轴向的合成方向做往复滑动摩擦运动,接触力呈现周期性波动规律;接触面不同结构形态与关键结构参数对合金块的磨损量有显著影响,采用凹双斜面结构可有效提升合金块的耐磨性。该研究可以为十字万向轴的结构优化设计及耐磨性的提高提供参考。 相似文献
14.
文章介绍了客车的发展对变速器提出了更高的要求,应用短行程同步器技术可以较好地满足这些要求。详细介绍了短行程同步器的结构特点和工作原理。对短行程同步器的设计要求,设计过程以及设计中的具体参数选择进行了说明。短行程同步器作为变速器的一种新技术,会逐渐受到客车公司和用户的青睐。 相似文献
15.
万向节两传动轴转角关系的三元复数推证方法 总被引:1,自引:0,他引:1
将平面二元复数的概念延伸、推广至三维复空间,以矢量为原型,以球坐标为依据,重申了三元复数模型的重要性.以此为数学工具,建立了三元复数的矢量运算规则.针对万向联轴节两传动轴转角关系式的推演,尝试了三元复数方法的使用.在此过程中,提供了一种新型的推证万向节两传动轴转角关系的有效方法. 相似文献
16.
Dynamics of universal joints, its failures and some propositions for practically improving its performance and life expectancy 总被引:1,自引:0,他引:1
Farzad Vesali Mohammad Ali Rezvani Mohammad Kashfi 《Journal of Mechanical Science and Technology》2012,26(8):2439-2449
A universal joint also known as universal coupling, U joint, Cardan joint, Hardy-Spicer joint, or Hooke??s joint is a joint or coupling in a rigid rod that allows the rod to ??bend?? in any direction, and is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft. The Cardan joint suffers from one major problem: even when the input drive shaft rotates at a constant speed, the output drive shaft rotates at a variable speed, thus causing vibration and wear. The variation in the speed of the driven shaft depends on the configuration of the joint. Such configuration can be specified by three variables. The universal (Cardan) joints are associated with power transmission systems. They are commonly used when there needs to be angular deviations in the rotating shafts. It is the purpose of this research to study the dynamics of the universal joints and to propose some practical methods for improving their performance. The task is performed by initially deriving the motion equations associated to the universal joints. That is followed by elaborating on the oscillatory behavior in the rotational speed and the torque that transmits through the intermediary shaft. The forces in the joint bearings are calculated by using an analytical method that is also supported by the numerical modeling. Such models are also used in order to calculate the rhythm and the amount of the excess loads on the joint. This is suggested as a systematic procedure in the search for the causes of the failures in these popular bearings. With the same purpose in mind some defected bearings with deformed sections were selected for the laboratory examinations. By analyzing the loading behavior and the surface conditions of the defected bearings and by comparison with the known fatigue theories attempts are made in order to dig into the causes for the failures in these joints and their bearing surfaces. With the aim of improving the performance and the life expectancy of these popular elements of the machineries, some practical recommendations are also suggested. 相似文献
17.
同步器压簧在锁环式同步器的工作过程中起着极其重要的作用,压簧的刚度和工作长度设计是影响同步器工作的两个重要方面,刚度对同步器预锁止十分重要,工作长度设计与同步器的结构布置和形式有关。着重分析压簧的刚度对同步器锁止可靠性的影响,通过理论分析、变速器总成台架试验和整车道路运行试验详细而深入地阐明同步器压簧设计的重要性,具有重要的参考价值。 相似文献
18.
19.
针对某型车用万向节十字轴轴承出现温升异常的现象,对其产生的原因进行了分析,并对轴承进行了优化设计,使轴承温升满足了设计要求。 相似文献
20.
张静 《机械工程与自动化》2012,(6):186-188
介绍了机械式变速器同步器的工作原理,列出了同步器的构成要素,并详细阐述了同步器同步时间及同步器锁止条件的计算分析;给出了商用车同步器同步时间的判定标准,为同步器的设计工作提供了依据。 相似文献