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用AutoCAD实现了机床主传动系统的三维实体造型,用VisualC 、VisualLISP等工具完成了主轴箱轴承、齿轮、轴等部位在运行中出现故障时的立体动画,经实时振动信号检测,以及信号处理(统计处理、频谱分析、小波分析等)后提取出故障特征,再经人工神经网络、模糊决策及专家系统等手段进行决策,判定故障部位和程度,并可在微机上直观地看到主轴箱在运行过程中,各故障具体部位及损伤程度的虚拟现实情况。 相似文献
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介绍了采煤机运行过程中其机械系统和液压系统常出现的主要故障,以及容易发生故障的主要部位,分析了故障的快速判断方法和检修方法,主要包括铁谱分析法、温度监测法、人工智能诊断法。 相似文献
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柴油机产生故障后,会出现一些异常现象,在现场可以采用下述应急措施对这些异常现象进行分析诊断,查找出故障的原因和部位,避免故障扩展。 相似文献
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1台某型号柴油机出现严重倒气现象,对此我们进行了排查。在找出故障部位的基础上,分析故障原因,并采取了改进措施。1.查找故障部位首先,测量机油加注口倒气时的排气压力为2.54kPa。其次,检查机油油位、冷却液液位正常,查看该机所用机油、柴油滤清器均使用正规厂商产品。再次,检查空气滤清器完好,进气道无漏气现象.且没有灰尘。 相似文献
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针对轴流涡轮风机在运行中多次出现自动跳停机的故障,进行振动频谱分析,找到了故障部位和原因,用于指导检修,避免了一起设备事故。同时总结出该风机滚动轴承损坏的特征和规律。 相似文献
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介绍了虚拟现实技术在齿轮箱故障诊断中的应用,用AutoCAD完成了齿轮箱的三维实体造型。用VisualC ,VisualLISP等工具完成了齿轮箱轴承,齿轮,轴等部位在运行中出现故障时的立体动画,经传感器实时检测机床的振动信号,并对这些信号进行频谱分析。小波分析等。可提取出故障特征。再用人工神经网络,模糊决策及专家系统等手段进行决策。判定故障部位和程度。可在微机上直观地观察到在运行过程中,齿轮箱各故障具体部位及损伤程度的虚拟现实情况。 相似文献
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大型轴流压缩机焊接机壳的动态特性分析 总被引:1,自引:1,他引:0
根据轴流压缩机的运行特性及工况条件,用有限元法对大型轴流压缩机焊接机壳进行了动态特性分析,获得了机壳的各阶固有频率和振型,明确了焊接机壳的薄弱环节.通过热稳态及瞬态动力学有限元分析,得到了焊接机壳的温度、应力和变形分布云图,以及危险区域的瞬态应力和变形曲线.提出了焊接机壳的改进方案,通过分析比较取得了改进参数,并验证了其合理性. 相似文献
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In this paper are presented the blade vibration characteristics at the starting conditions of the low pressure multistage
axial compressor of heavy-duty 100 MW gas turbine. Vibration data have been collected through strain gauges during aerodynamic
tests of the model compressor. The influences of operating modes at the starting conditions are investigated upon the compressor
blade vibrations. The exciting mechanisms and features of blade vibrations are investigated at the surge, rotating stall,
and buffeting flutter. The influences of operating modes upon blade dynamic stresses are investigated for the first and second
stages. It is shown that a high dynamic stress peak of 120 MPa can occur in the first stage blades due to resonances with
stall cell excitations or with inlet strut wake excitations at the stalled conditions. 相似文献
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为了定量描述涡旋压缩机的运行状态,应用信息熵理论,建立了一种基于时域的奇异谱熵、频域的功率谱熵、时 频域小波能量谱熵和小波空间特征谱熵的振动信号分析方法,并作为综合评价涡旋压缩机振动状态的定量特征指标。实现了在恒转速条件下涡旋盘固有频率的识别,定量分析了动涡盘轴向振动、径向柔性机构及轻微液击等对压缩机的影响。揭示了变转速条件下涡旋盘3种周期激变的运动形式及信息熵随着压缩机转速变化的规律。研究结果为涡旋压缩机故障诊断提供了基础数据。 相似文献
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Time-dependent vibration frequency reliability analysis of blade vibration of compressor wheel of turbocharger for vehicle application 总被引:1,自引:0,他引:1
Blade vibration failure is one of the main failure modes of compressor wheel of turbocharger for vehicle application. The existing models for evaluating the reliability of blade vibration of compressor wheel are static, and can not reflect the relationship between the reliability of compressor wheel with blade vibration failure mode and the life parameter. For the blade vibration failure mode of compressor wheel of turbocharger, the reliability evaluation method is studied. Taking a compressor wheel of turbocharger for vehicle application as an example, the blade vibration characteristics and how they change with the operating parameters of turbocharger are analyzed. The failure criterion for blade vibration mode of compressor wheel is built with the Campbell diagram, and taking the effect of the dispersity of blade natural vibration frequency and randomness of turbocharger operating speed into account, time-dependent reliability models of compressor wheel with blade vibration failure mode are derived, which embody the parameters of blade natural vibration frequency, turbocharger operating speed, the blade number of compressor wheel, life index and minimum number of resonance, etc. Finally, the rule governing the reliability and failure rate of compressor wheel and the method for determining the reliable life of compressor with blade vibration is presented. A method is proposed to evaluate the reliability of compressor wheel with blade vibration failure mode time-dependently. 相似文献
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催化裂化能量回收装置主风机组运行状态分析 总被引:3,自引:0,他引:3
讨论了如何运用在线式烟气轮机状态监测及故障诊断系统监测诊断主风机组的运行状态,以实例分析了机组的故障原因。得出了不仅要看振动是否超标,而且要观察变化,尤其是相位的改变等结论。 相似文献
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