共查询到19条相似文献,搜索用时 93 毫秒
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介绍了利用共振解调、转速跟踪主动诊断技术识别轴承保持架故障的优越性。通过对保持架破损的机理分析,找出其疲劳断裂的原因,并提出了治理建议。 相似文献
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2017年局内发生多起HXD2B型机车电机传动端轴承保持架断裂故障,由于JK11430走行部车载监测装置数据中无预报警信息、日常入库时电机轴承无法检查,给机车走行部带来安全隐患。通过对JK11430走行部车载监测装置数据进行了分析,梳理出了在无预报警信息情况下如何通过数据卡控电机轴承保持架故障。 相似文献
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多孔含油保持架常见故障分析 总被引:2,自引:2,他引:0
多孔含油保持架是70年代发展起来的新型保持架,已广泛应用在各种高精度陀螺马达轴承中。在使用过程中也出现了由于保持架故障而导致轴承失效的情况,本文进行了归纳整理,并给出了保持架故障的原因、表现形式及解决办法。多孔保持架最常见的故障原因大致可以分为保持架设计不合理、保持架材料性能不合格、保持架加工精度不够、轴承制造缺陷以及润滑、使用不当等方面,详见图1。图11 保持架的运转不稳定保持架运转不稳定的表现形式主要是,轴承进入高速运转后,就出现有规律的高频振动或低频振动,通常把高频振动称为啸叫,其振动频率… 相似文献
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某型发动机装配工艺采用直接敲击方式将涡轮轴装入转子连接轴,轴承内圈和滚子上产生了多处预损伤,最终导致保持架断裂。通过设计工装,改进装配工艺,后续发动机装配后没有再出现类似故障,建议后续其他轴承装配过程中注重温升对轴承安装影响及设计工装,尽可能减少人为因素影响。 相似文献
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高速角接触球轴承中,球与保持架的碰撞会导致球与滚道的冲击滑动,从而引起滚道划伤和轴承早期失效。为探究球与保持架的冲击碰撞导致的瞬时滑动,以某高速角接触球轴承为研究对象,通过对联合载荷下角接触球轴承的动力学仿真,分析了变速工况及保持架结构参数对球与保持架的冲击碰撞、球与滚道的冲击滑动以及零件磨损率的影响。结果发现,加减速及恒定转速下,球与保持架的运动呈现周期性变化;由于球进入和离开径向载荷区域时公转角速度的变化,球与保持架碰撞并导致球相对内、外圈滚道发生冲击滑动;为适应球公转角速度的变化,适当增大兜孔间隙,可以减小球与保持架兜孔碰撞力的大小和频率,从而减小球与滚道的冲击滑动以及保持架的磨损率。 相似文献
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深沟球轴承浪形保持架,按新参数设计存在夹球问题。采用松铆钉结构,调整兜曲率Rc取值,解决夹球问题,提高回转灵活性。 相似文献
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ABSTRACTThis article presents both experimental and analytical investigations on the dynamic behavior of the cage in a ball bearing. For the experimental investigation, a wireless sensor telemeter system was designed and developed to monitor the cage motions. The sensor, which was integrated on the bearing cage, is composed of a commercially available capacitor–inductor (LC) circuit. The LC circuit on the rotating cage was coupled to a transceiver that was stationary and positioned in close proximity to the cage. In order to achieve the objective of the analytical investigation, the explicit finite element method (EFEM) was used to simulate the bearing cage. The EFEM cage model was then combined with the dynamic bearing model to simulate the cage motion during operation. The results from the experimental measurement using the telemeter were then compared with the analytical modeling. The developed telemeter demonstrated the capability of the cage telemeter in detecting various bearing frequencies. These include the cage frequency, shaft frequency, and ball pass frequency on the outer race (BPFO), which was introduced by creating a spall on the bearing outer race. Compared to standard accelerometers that are commonly used to measure vibrations on the bearing housing, the cage telemeter has shown advantages in sensing cage motions and detecting bearing defects regardless of the location of the damage. Analytical simulation using the EFEM cage model correlated well with the experimental results and provided more insight into the bearing cage dynamics. 相似文献
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Pradeep K. Gupta 《摩擦学汇刊》2013,56(3):393-400
Dynamic performance simulations of a high-load, high-speed ball bearing for turbine-engine applications are considered using the available Dynamics of Rolling Element Bearings (DREB) computer program. It is shown that the key element in the bearing design is the traction behavior at the ball/race interface for the prescribed materials. With a given traction model, the geometry of the bearing may be designed to ensure acceptable ball/cage collision forces and to ensure the general stability of the cage. 相似文献
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本文在总结高速球轴承运动学、动力学研究的基础上,指出C.R.Meeks的保持架六自由度动力学分析模型是一种经济有效的球轴承分析模型。 相似文献
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研制新型结构轴承保持架是解决目前微型灵敏轴承摩擦力矩大的关键之一。完成了具有独特的自锁球结构的微型灵敏球轴承新型结构金属实体保持架的设计,阐述了其加工工艺、关键技术、检测手段及轴承装配方法,这种结构保持架的研制在微型灵敏轴承减摩研究方面具有重要意义。 相似文献