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湘钢热电厂3^#风机带负荷运行过程中,汽轮机和风机轴先后发生不稳定振动且振幅持续增大的现象。从振动特征结合振动机理分析,找出异常振动的主要原冈分别是:2^#轴承附近油档发生动静碰磨和风机3^#轴振动测量传感器故障。通过调整油档间隙和更换轴振动测量传感器,消除了机组异常振动现象机组可以正常运行。 相似文献
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许渝萍 《冶金设备管理与维修》2009,(1):9-11
通过对重钢1号1.8万m^3制氧机组2号氧压机传动系统的振动监测,运用振动理论,采用振动频域分析方法,对振动信息进行时域和频谱分析,初步确定了传动系统异常振动的原因,为设备检修提供了科学依据。 相似文献
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通过振动分析仪对炉辊轴承座进行振动监测,分析振动特征,利用频谱分析找出炉辊振动异常的原因,避免突发事故发生,确保设备的安全运行。 相似文献
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25t抓斗桥式起重机的异常振动严重影响着作业安全,降低生产作业效率,增加了作业成本,机械故障率急剧上升。针对异常振动出现后抓斗桥式起重机各部故障现象,对引起异常振动的原因进行了分析,寻找产生异常振动的根源,以及相应的处理措施。 相似文献
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通过对烧结风机运行状态的监测,建立其异常振动的波形和频谱特征,探讨了振动故障诊断的原则和方法,为风机安全经济运行提供保障。 相似文献
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曾新华 《Canadian Metallurgical Quarterly》2011,28(8)
通过对凝结水泵异常振动现象的观察与分析,找出了凝结水泵异常振动的原因,结合现场设备特点,采取一定手段和措施,解决了凝结水泵异常振动这一故障,确保了生产系统的稳定顺行。 相似文献
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氧气压缩机突然发生振动异常,为了保证安全生产,通过S8000在线状态监测系统对振动数据进行分析,及时判断故障原因和趋势,确定故障的检修时机,保证了设备运行的安全性。 相似文献
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MJ Griffin 《Canadian Metallurgical Quarterly》1998,55(5):340-348
OBJECTIVES: A method of evaluating the effectiveness of gloves in reducing the hazards of hand-transmitted vibration is proposed. METHOD: The glove isolation effectiveness was calculated from: (a) the measured transmissibility of a glove, (b) the vibration spectrum on the handle of a specific tool (or class of tools), and (c) the frequency weighting indicating the degree to which different frequencies of vibration cause injury. With previously reported tool vibration spectra and glove transmissibilities (from 10-1000 Hz), the method was used to test 10 gloves with 20 different powered tools. RESULTS: The frequency weighting for hand-transmitted vibration advocated in British standard 6842 (1987) and international standard 5349 (1986) greatly influences the apparent isolation effectiveness of gloves. With the frequency weighting, the gloves had little effect on the transmission of vibration to the hand from most of the tools. Only for two or three tools (those dominated by high frequency vibration) did any glove provide useful attenuation. Without the frequency weighting, some gloves showed useful attenuation of the vibration on most powered tools. CONCLUSIONS: In view of the uncertain effect of the vibration frequency in the causation of disorders from hand-transmitted vibration, it is provisionally suggested that the wearing of a glove by the user of a particular vibratory tool could be encouraged if the glove reduces the transmission of vibration when it is evaluated without the frequency weighting and does not increase the vibration when it is evaluated with the frequency weighting. A current international standard for the measurement and evaluation of the vibration transmitted by gloves can classify a glove as an antivibration glove when it provides no useful attenuation of vibration, whereas a glove providing useful attenuation of vibration on a specific tool can fail the test. 相似文献
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轧钢机主传动系统轴向振动固有频率分析 总被引:2,自引:0,他引:2
介绍了一类轧钢机主传动系统轴向振动固有频率的计算方法,计算结果与实测吻合。在与扭振固有频率的对比分析基础上,得出不会发生两种固有振动谐振的结论 相似文献
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为我国在矿用振动筛机械系统的振动理论、结构动强度、减振降噪措施、动力学参数计算及实验测定等方面的研究概况,提出了对矿用振动筛研究与发展趋向的看法. 相似文献
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介绍了首钢京唐公司制氧站膨胀机振动监测系统。结合硬件构成分析了原有振动监测系统缺陷,针对缺陷提出振动监测系统改造方案,对改造后的振动监测系统的优势进行了总结。 相似文献