油气润滑系统的设计与计算

润滑系统是机械设备中不可缺少的组成部分,根据润滑部位、润滑方式以及润滑管路的高低长短来选择正确的润滑方式,有稀油润滑、脂润滑以及油气润滑等,介绍了比较新颖的油气润滑方式的原理、管路设计以及典型润滑点的油量计算、参数选择。     

油气润滑在热轧矫直机上的使用

新余钢铁公司中板厂十一辊矫直机是１９９４年随四辊轧机同期建设的。其工作辊轴承和支撑辊轴承的润滑,原设计采用的是集中干油润滑,在工作过程中因为工作辊,支承辊及其轴承长期处于高温条件下,且受大量冷却水及氧化铁皮等影响,易使干油管道内的油脂在高温下碳化堵塞,轴承难以得到有效的润滑而造成早期损坏卡死。支承辊轴承损坏卡死后,因支承辊轴承不转而在工作辊表面切磨出环行槽筋,既降低了工作效率,更影响钢板的表面质量。１９９４年９月至１９９７年６月,该矫直机因工作辊及支承辊轴承碎裂而导致其辊系有效使用寿命极短,每年…     

滚动轴承的油气润滑

一般滚动轴承都采用脂润滑，但速度比较高或对冷却有特殊要求的则要采用油润滑。     

油气润滑技术的应用及系统设计

着重阐述油气润滑的原理、特点及油气润滑系统设计的基本要素     

一种新型润滑系统—油气润滑系统

随着自动化程度不断提高,润滑技术也同样由简单到复杂,不断地更新发展,从手动润滑到自动润滑;从散点润滑到集中润滑系统。而且,随着对润滑要求越来越高,润滑系统也在不断改进和完善,以满足不同的要求。目前,国内的集中润滑系统分为稀油润滑系统、干油润滑系统、、油雾润滑系统,在马钢高速线材厂从德国西马克公司引进的高速线材轧机的润滑设备中,我们首次遇到了油一气润滑系统:它是比油雾润滑更加优越的一种新型的润滑系统,具有油雾润滑的优点而又避免了油雾润滑的一些不足。 1.油—气润滑系统的工作原理     

油气润滑设备润滑油站的设计

论文针对油气润滑设备设计了一种新的滑油站的结构,采用Fluent对油箱进行了温度场仿真,分析了其加热性能。结果表明,该润滑油站能够满足大型油气润滑设备的使用需求,降低了油气润滑设备的成本,减少了能源的浪费。     

高速滚动轴承油气润滑试验研究

对高速滚动轴承7006C进行了油气润滑试验研究。测试了油气润滑供油量、润滑油粘度、油气压力和转速对被试轴承温升的影响,确定了高速滚动轴承合理的油气润滑参数。试验表明：随着供油量增大,轴承温度呈现由大变小,再由小变大的渐进变化;随着粘度指数的增大,轴承温升同样呈现由大到小,再由小到大的变化过程;在本试验装置额定的油气压力范围内,随着油气压力增加,轴承温升呈单调下降趋势;随着转速的升高,轴承温升相应地增加。     

YQA－5油气润滑器

油气润滑是一种新的润滑技术，它具有比油雾润滑更好的润滑效果和更高的可靠性而得到迅速发展。介绍了ＹＱＡ－５油气润滑器及应用于高速主轴轴承的润滑效果，并与油雾润滑效果以及进口同类产品的润滑效果进行了比较。     

滚动轴承油气润滑及喷油润滑温度场对比研究

分析滚动轴承内部生热机制,计算不同转速下油气润滑和喷油润滑的轴承滚道表面对流换热系数;应用Workbench流场分析模块,建立滚动轴承流体域几何模型,对不同转速下滚动轴承油气润滑和喷油润滑时轴承腔热流耦合温度场进行仿真分析。结果表明,当轴承转速较低时,油气润滑和喷油润滑时轴承腔最高温度基本相同,但油气润滑条件下轴承腔的整体温度远远低于喷油润滑方式;当轴承转速较高时,油气润滑条件下的轴承腔最高温度要远远低于喷油润滑条件下的轴承腔最高温度,从而验证了高速工况下油气润滑的优越性。     

干油集中润滑系统常见故障及维护措施

以流出式干油集中润滑系统为例,分析常见故障,从产生原因入手,提出日常维护措施。     

往复压缩机注油系统不正常的故障分析与处理

对往复压缩机注油系统在工作中可能出现的各类故障进行分析总结,并对各类故障提出了解决办法。     

润滑系统在大型机组中的应用

润滑系统在各类机械转动设备中起着非常重要的作用,在设备的保养及维护中,都对润滑的各种参数及控制有详细的说明及应用。主要是对炼油装置大型机组的润滑系统中的主要仪表控制系统进行论述说明,从仪表方面了解润滑系统在机组中的重要作用。     

Surfactant dithiophosphates lubricating oil additives

Abstract

This paper presents a research on the tribological properties and the action mechanisms of surfactant lubricating oil additives, polyalkoxy glycol ammonium salts and O,O,S-triesters of polyalkoxy glycol dithiophosphoric acid. To understand the physicochemical properties of surfactants, polyalkoxy glycol dithiophosphoric acid behaviour both in solution and at metal surfaces are identified and discussed. The STM adsorption on steel surface, four-ball and ball disc tests of friction of water, synthetic and mineral oil solutions studies of these additives are presented. Friction and wear properties are dependent on tribological parameters, chemical structure of the additives and their surface active behaviour in tribological systems. The relationships are presented on the example of additives with different molecular structures and masses.     

新型发动机滑油系统故障预防与分析

主要介绍新型飞机的滑油系统，并结合该型飞机实际工作情况，对滑油系统所产生的故障进行综合分析，提出了一些具体的解决措施。     

8MN快锻压机润滑系统的设计与应用

利用递进式分油器对快锻压机定点、定量、定时供油润滑，有效地解决了设备的平面运动副磨损问题。     

The lubricating properties of used engine oil

The lubricating properties of oil samples from four cars using either leaded or unleaded gasolene were examined using a cross-pin-type lubricant tester and a JIS four-ball tester. The zinc dialkyldithiophosphate (ZnDTP) content in the oil samples was determined by thin layer chromatography (TLC). The wear scar diameter increased with running distance up to 2000 km. At running distances above 2000 km, the wear scar diameter decreased for oil from cars using unleaded gasolene but increased for oil from cars using leaded gasolene. The load-carrying capacity also varied depending on the type of fuel used. The TLC spot characteristic of ZnDTP disappeared after running distances of 3000 km with both fuels. However, another spot, characteristic of lead dialkyldithiophosphate (PbDTP), appeared below the ZnDTP spot for oil from cars using leaded gasolene. These results indicate that the differences in the lubricating properties of oils from cars using leaded and unleaded gasolene are due to the formation of PbDTP.     

The unacceptable face of lubricating oil additives

In order to extend the range of application of mineral lubricating oils, lubricant technologists attempt to enhance inherent oil properties by incorporating small amounts of additives. While there is little doubt that they succeed in their primary objective, additives by their very nature tend to be more reactive than the oils in which they are incorporated and there is always the risk of unexpected side effects in their use. This paper gives examples from industrial machines where lubricating oil additives have been responsible for serious lubrication problems and concludes that additives should only be used in situations where they are essential: full consideration should be given to possible harmful side effects     

固体润滑剂的应用展望

介绍固体润滑剂在工业轴承中的应用状况、以悬浮形式、以油膏剂形式和作自润滑材料等的应用状况;指出当前纳米固体润滑剂的应用和固体润滑剂用于微电子机械系统的润滑、电子计算机磁头和空问机械润滑的自组装膜的制备是固体润滑剂应用研究人员探索的方向。