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研究了冷冻机油对R314a旋转式冰箱压缩机性能的影响。对比实验表明,国产的冷冻机油能够满足制冷剂替代对冷冻机油特性的要求。 相似文献
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冷冻机油对压缩式制冷系统的影响及选择 总被引:5,自引:1,他引:4
分析了冷冻机对压缩式制冷系统的作用和影响,介绍了制冷系统对冷冻机油的质量要求,国产冷冻机油的品种标准及选择冷冻机油的方法。 相似文献
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制冷压缩机运行过程中,在一定压力与温度条件下,制冷剂将部分或全部溶解到冷冻机油中,冷冻机油与制冷剂混合状态下的抗磨性能极大地依赖于制冷剂与冷冻机油的"相溶性"特征。建立一种评定冷冻机油与制冷剂混合状态下抗磨损性能的试验方法,通过环块试验确定与制冷剂共存的冷冻机油抗磨性能评定的最佳工艺参数。试验效果评估及重复性验证结果表明,提出的评定方法对不同类型冷冻机油及不同合成油与矿物油的抗磨损性能具有较好的区分性,可用于冷冻机油产品的筛选和新产品的研发。 相似文献
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陈铁飞 《机械工人(冷加工)》1994,(7):21-24
本组产品包括空气压缩机油,真空泵汕、冷冻机油和气体(指除空气和制冷剂以外的气体)压缩机油。各品种划分的依据如下: (1)空气压缩机油根据空压机类型,载荷(排气压力、排气腽度、银压力比等)和油的组成。 (2)真空泵油按泵的类型、真空状态和有无腐蚀性气体。 (3)冷冻机油根据蒸发器工作温度,制冷剂和冷冻机类型以及油的组成。 相似文献
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冷冻机油主要指标及其简易识别检验方法 总被引:3,自引:0,他引:3
冷冻机油主要指标及其简易识别检验方法王明泉冷冻机油是制冷压缩机的血液、它的质量优劣直接影响机器的寿命和工作效率。必须按标号准确的选择冷冻机油和鉴别各项主要指标是否合格。一些用户只有两台制冷机或冷藏柜。对冷冻机油没有检测能力.因此采用一种简而易行的方法... 相似文献
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纳米ZnO粒子对航空润滑油性能的影响 总被引:2,自引:0,他引:2
利用机械共混手段,将ZnO纳米粒子加入到航空润滑油中,用自制磨损实验机考察了其对润滑油抗磨性能的影响。结果表明:ZnO纳米粒子能显著提高润滑油的抗磨性能。 相似文献
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利用质谱技术对多个I类油(溶剂精制基础油)和II类油(加氢基础油)组成进行分析,通过四球机、SRV摩擦磨损试验机对不同基础油组成与油品抗磨性能之间的关系进行了研究.经过大量试验后,对试验结果进行统计和归纳,建立了基础油组成与油品抗磨性能的线性模型.结果表明:随基础油中链烷烃与少环环烷烃含量增加,油品抗磨性能有变差的趋势;随芳烃含量及基础油100 ℃黏度的增加,油品抗磨性能有变好趋势. 相似文献
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The change in the lubrication properties of vehicle engine oils with driving distance was studied by using a cross-pin type of lubricant tester and a Fourier transform IR spectrometer. The effect of the thermal decomposition of zinc dialkyldithiophosphates (ZnDTPs) on their antiwear property was also examined. The amount of the ZnDTP in engine oil decreased and the amounts of the decomposition products increased with increasing running distance but a good antiwear property was still observed. After 60 h of heating at 135°C, the ZnDTP in sample oils had decomposed into a precipitate and the antiwear property of the oil had deteriorated. With sample oils containing ZnDTP and a detergent or a dispersant, the decomposition products dissolved in the oil and the antiwear property was maintained even after 80 h of heating. The results suggest that the decomposition products of ZnDTPs have a good antiwear property and that the good antiwear property of the used engine oils was retained because of the solubilization of decomposition products into the oil with the aid of a dispersant or a detergent. 相似文献
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Yuan-Ching Lin Tsang-Hung Kan Jiun-Nan Chen Jr-Chiun Tsai Yong-Yuan Ku Ko-Wei Lin 《摩擦学汇刊》2013,56(6):997-1010
In this study, petrodiesel (D100) and different concentrations of commercial biodiesels (B100, B50, B5) were blended with a commercial engine oil at a fixed volume ratio of 1:9 to investigate the tribological effect of the biodiesels on the antiwear performance of the engine oil. The antiwear performance of the blended oils was evaluated using a Plint TE77 reciprocating ball-on-flat tribometer at room temperature and 150°C. Results show that the antiwear performance of the engine oil blended with petrodiesel is worse than that of the other blended oils with biodiesels at both temperatures. At room temperature, the physical adsorption and local hydrodynamic effects of the blended oils dominate the tribological behavior; at 150°C, the biodiesel seems to promote the growth of a reaction film with the antiwear additives in engine oil and enhance the growth rate of chemical films. However, an excess concentration of biodiesels causes tribochemical wear, thus reducing antiwear performance. 相似文献
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硫化异丁烯与ZDDP复配对菜籽油摩擦学性能的影响 总被引:1,自引:0,他引:1
以菜籽油为基础油,选择硫化异丁烯(T321)为极压添加剂、ZDDP为抗氧抗腐剂,采用均匀试验方法设计试验方案,并测定在不同添加剂含量下的pB值(最大无卡咬负荷)和WSD值(磨斑直径),利用逐步回归法和扫描电子显微镜(SEM)分析了基础油和添加剂之间的配伍性及其对菜籽油摩擦学性能的影响。结果表明:当硫化异丁烯的含量低时会降低菜籽油的承载能力,当含量高时可提高菜籽油的承载能力,ZDDP无论在低含量还是高含量均可提高菜籽油的承载能力。ZDDP对菜籽油抗磨性能的作用大于硫化异丁烯。 相似文献
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按高压泵的磨损情况来评定油品质量是抗磨液压油研究的重要内容之一,本文通过建立的试验泵模拟试验方法,对抗磨液夺油试验用高压泵的磨损情况深入研究,此项研究不仅为我国抗磨液压油品质量的评定提供了重要的分析依据,同时也为高压泵摩擦材料的合理选择,磨损机理的分析研究奠定了基础。 相似文献