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本设计针对注脂机设计的技术难点,讨论分析了现有轴承注脂工艺及设备的特点和不足,提出了三点式定量注脂的工艺方案,制订了相应的注脂工艺,设计开发了新型轴承注脂设备。该三点式定量注脂机分别在2个大端面部位和中隔圈部位进行注脂,每次的注脂量定量准确而且可调。该注脂机采用PLC智能控制系统控制,运用伺服驱动系统注脂,使用涡轮流量计作为注脂量的计量工具。伺服电机系统精度为1mm,注脂量的精度为5g。各位置的注脂量直接在流量显示屏中显示出来,而且注脂量准确,分布均匀,操控简单,生产效率高。与原有的一次注油方式相比,可避免轴承在运行过程中因油膜破坏造成的转动不灵活现象的发生。 相似文献
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密封轴承定量注脂机及工装设计 总被引:1,自引:0,他引:1
介绍了密封轴承定量注脂机的工作原理及关键部件注脂计量缸的结构原理和注脂头的结构设计.该注脂机实现了注脂自动化,注脂计量精确,注脂后的轴承清洁干净。 相似文献
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采用手动注脂方式无法确定深沟球轴承具体的注脂部位和注脂量,容易造成润滑脂的污染及加注润滑脂的过量或不足,影响轴承外观质量及使用寿命。为了解决这一问题,设计制造了注脂模具,对深沟球轴承注脂方式进行了改进。 相似文献
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铁路货车滚动轴承检修时,须对滚动轴承重新注油脂。现依据铁路货车滚动轴承检修技术标准要求,研制了滚动轴承双注脂头注脂机,满足了不同型号轴承需注不同油脂量及不同型号油脂的要求。该轴承双注脂头注脂机以压缩空气为动力,采用PLC控制,具有自动化程度高、注脂量控制精度高等优点。完全达到铁路货车滚动轴承检修技术标准要求。 相似文献
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分析闭式深沟球轴承采用YG-3型轴承注脂压盖机进行加注锂基脂时存在的注脂后沟道内部不能形成有效油膜的原因,对辅助工装中注脂装置和挡料板结构进行了改进。 相似文献
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目前 ,国内密封轴承加注润滑脂除少部分引进自动线以外 ,大部分为手工操作 ,而自动线占用资金多 ,手工加脂不均匀且不整洁 ,基于这种情况 ,我公司自行研制了注脂机。该机主要用于密封轴承润滑脂的定量注入 ,具有体积小、重量轻、结构简单和操作方便等特点。注脂量无级可调 ,注脂均匀 ,性能非常稳定。该注脂机的喷脂嘴安装在喷脂座上 ,而喷脂嘴座直接安装在分脂阀体上 ,这样注脂缸压出的高压润滑脂通过分脂阀及喷脂嘴座上很短的油道直接流入喷脂嘴 ,克服了润滑脂的“爬行”现象 (由于润滑脂的粘性较大 ,其阻尼也很大 ,管道越长 ,其爬行越严重… 相似文献
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磁性润滑脂密封在运转过程中的温升对其使用寿命影响较大.针对这一问题,设计一种多级磁性润滑脂密封实验装置,通过实验研究密封介质压力、磁性润滑脂注入量、密封间隙及转速对磁性润滑脂密封温升的影响,分析不同转速下密封的功率损耗.结果表明:磁性润滑脂的径向截面形状以及剪切速率是温升的主要影响因素;在保证密封承压能力的前提下,适当减少磁性润滑脂注入量,增大密封间隙,可以减少磁性润滑脂的发热量;磁性润滑脂密封的功率损耗随转速升高而增大,且比理论计算结果大,因此在密封系统设计时应予以充分考虑. 相似文献
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Chih-Ling Lin 《摩擦学汇刊》2013,56(4):667-687
AbstractAged mineral-oil-based, lithium-hydroxystearate-thickened grease was collected from used axle spherical roller bearings, which were used for urban commuter trains. Three types of aged grease were categorized based on the total distance that the bearing had traveled, as early life (<0.05 million km [M.km]), medium (0.3–0.6 M.km), and heavily used (1.82 and 2.0 M.km). The microstructure of degraded grease from 20 bearings was characterized in this project using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Base oil of each grease sample was released by a centrifugation method and the oxidation of bled oil was measured by infrared analysis. A notable change in grease microstructure was observed by AFM and SEM. The thickener morphology changed from an entangled helical fibril structure to particle-like nanofragments. The variation in thickener microstructure was observed in the early life grease, which suggested grease can experience an inconsistent aging process in the real-life bearings. Overall, 70.5?±?1.37?wt% base oil bled from the fresh grease, 68.2?±?0.73?wt% from the early life grease, 58.1?±?2.33?wt% from the medium used grease, and 60.0?±?6.35?wt% from the heavily used grease. The results suggest that the densely packed microstructure observed in the aged grease affects the capability of base oil bleeding from the grease. The retardation of base oil flow due to degraded grease may result in the lubricating ability of grease becoming compromised and hence result in an increased wear rate of the bearings. 相似文献
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为改善轧钢机轴承用润滑脂的性能,采用不同质量分数的石墨烯对润滑脂进行了改性,测定各润滑脂样品的锥入度和滴点,使用四球摩擦试验机研究石墨烯对润滑脂摩擦学性能的影响,使用扫描电子显微镜、白光干涉仪和拉曼光谱仪等分析石墨烯在润滑脂中的减摩抗磨机制。结果表明:石墨烯作为添加剂能提高润滑脂的滴点和改善润滑脂的极压性能以及减摩抗磨性能。当石墨烯质量分数为0.2%时,对润滑脂极压性能的提升效果最好,表现为烧结负荷和综合磨损值最大,较基础脂分别提高了29.0%和24.0%;当石墨烯质量分数为0.3%时,对润滑脂减摩抗磨性能的提升效果最好,摩擦因数和磨斑直径较基础脂润滑时分别下降了22.4%和13.0%,磨损体积减少了43.0%,且最大无卡咬负荷提高了21.2%。石墨烯在摩擦过程中,吸附在摩擦表面,形成保护薄膜阻止了摩擦副材料的直接接触,减少了磨损,同时提高了润滑脂的承载能力。 相似文献
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Water is one of the most common contaminants in grease lubrication. There are numerous applications where bearings are susceptible to water ingresses such as in the steel, food, and pulp and paper industries. A grease can absorb water to different degrees depending upon the type of grease. The ability of a grease to either absorb or reject water can influence the service life of rolling bearings. Two parameters that determine the performance of a grease at very low temperature are the yield stress and startup torque. Water was found to influence the yield stress and startup torque depending on the operating temperature, grease type, and percentage water in the grease. 相似文献