共查询到19条相似文献,搜索用时 187 毫秒
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针对6314 ZZz轴承在运行过程中出现异常声的现象,对轴承进行了拆套检查和寿命校核计算,分析得出润滑脂失效是造成异常声的原因,润滑脂的选用应根据实际工况确定. 相似文献
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润滑因素与滚动轴承失效的关系研究 总被引:1,自引:0,他引:1
为分析润滑因素与滚动轴承失效之间的关系,通过对滚动轴承失效形式的统计,分析各种失效形式与润滑之间的相互作用机制;采用实验方法从轴承本身和润滑脂方面分析滚动轴承的失效机制;阐述润滑因素对滚动轴承寿命的影响。研究结果表明:表面磨损是滚动轴承失效的主要表现形式;润滑脂润滑性能达不到要求是导致滚动轴承达不到额定寿命的主要原因;滚动轴承失效通常伴随着润滑脂的润滑性能下降、油膜压力和厚度的分布发生变化,而润滑脂的这种变化会促使滚动轴承失效的加剧,轴承寿命缩短。 相似文献
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为了探究风力发电机组主轴承用润滑脂的寿命变化趋势,首先分析了影响润滑脂寿命的主要因素,然后从现有的润滑脂寿命计算经验公式或试验数据图表中选取了适合的公式,并利用Komatsuzalki等人的研究结果得出了计算风力发电机组主轴承用润滑脂寿命的方法;基于该方法MATLAB Simulink中建立的风力发电机组主轴承润滑脂寿命预测仿真模型。最后,通过从系统逻辑和模型预测的结果两方面对仿真模型进行验证。结果表明,润滑脂寿命预测模型的仿真结果与实际情况在逻辑上完全相吻合,预测结果与实际情况接近。 相似文献
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TCP表面处理技术的延寿机理 总被引:4,自引:3,他引:1
为了提高陀螺马达球轴承的精度寿命,针对其润滑系统的失效形式,对轴承进行TCP表面改性技术处理,从而有效地提高了轴承润滑系统的静态和动态可靠性,延长了轴承的寿命。 相似文献
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在对国产汽车水泵轴承用脂调研的基础上,选用3类典型轴承用润滑脂进行高温耐久性寿命、抗水能力、防锈性及与尼龙材料相容等性能的评价试验和分析,考察了汽车水泵轴承用润滑脂选择的基本要求、相关技术指标及试验方法。对比分析认为,聚脲脂是一种效果理想的可作为汽车水泵轴承用的润滑脂品种。 相似文献
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叶片增温、增湿过程中,加料筒内蒸汽处于过饱和状态,为了使筒内蒸汽压力保持相对平衡,应用排潮风机进行排潮。雾化蒸汽及冷凝水渗入风机叶轮轴承、电机(转子)轴承,使得其润滑脂溶解流失,加剧轴承磨损,轴承寿命严重降低,造成排潮风机传动系统故障频发。将传动系统由直接传动(A传动)改为分级传动(C传动),可有效降低设备故障率。 相似文献
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低速重载滚动轴承的状态监测 总被引:1,自引:0,他引:1
炼钢厂连铸机大包回转台轴承是典型的大型低速重载回转设备,由于常规的振动传感器很难拾取如此低频的信号致使振动分析无法进行,因此利用润滑脂的光谱和铁谱分析方法对其进行状态监测。在此研究过程中,开发出新的润滑脂专用溶剂。研究结果表明,利用润滑脂的光谱和铁谱分析技术来评价该类型低速重载轴承磨损状态是可行的,1#连铸机大包回转台轴承的使用寿命延长到了14年。 相似文献
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Grease is degraded during use in rolling element bearings and as a result the lubrication performance can deteriorate. Under severe conditions this can result in lubrication failure and, thus, the grease life will effectively limit the bearing life. At present there is a lack of detailed information regarding the changes that occur in the grease and the way in which this degradation affects lubrication performance and failure. This paper reports an initial study into grease degradation in bearings. The aim of the work was to characterize the changes that occur to the chemical and physical properties during use. A series of bearing tests using the modified DIN 51 806 test designated R2F(M) have been carried out using two greases: additized and non-additized. The tests have been run for different temperature and speed conditions for up to 300 hours. The aim was to examine the grease during normal running rather than after failure. At the end of the tests the bearings were dismantled and grease taken from different parts of the bearing for infrared spectroscopic analysis. This technique can characterize the degree of oxidation or degradation of the grease both in the bulk sample and from thin grease layers remaining on the bearing surfaces. The analysis has shown that the condition of the grease varies depending on the distribution within the bearing. The lubricant remaining in the cage pocket region was heavily degraded and contained very little thickener. The grease on the seals contained different amounts of thickener depending on the seal position. The lubricant remaining on the inner raceway surface was predominately base oil although there was some thickener present. These results are discussed in the light of proposed bearing lubrication mechanisms. 相似文献
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6201-2RZ轴承装在某型电机上使用至38小时发生抱死,经对轴承故障特征的理化分析,发现轴承在工作时承受了过大的轴向力,钢球的工作轨迹偏离正常位置使钢球的接触载荷增大,形成恶性循环,使润滑脂失效,造成轴承卡死,保持架断裂。 相似文献
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In this article, the mechanical aging behavior of lubricating greases with a fibrous structure is studied by aging fresh samples at controlled shear rates and temperatures in an in-house-made Couette aging machine. The rheological properties of fresh and aged samples were evaluated in a plate–plate rheometer. In the absence of oxygen, no chemical reactions occurred. The results showed that shear degradation is accelerated by increasing the temperature. This thermal effect can be described by an Arrhenius law. A grease aging master curve was created to describe the influence of shear and temperature on the mechanical aging of fibrous structured grease. Next, the model was validated using a conventional grease worker test. Finally, the model was applied to full ball bearings using an R0F?+?bearing test rig. The master curve forms an important contribution to the development of grease life models. 相似文献