Development and Estimation of New Lubricant for Alternative Refrigerant

聚乙烯醇聚乙烯醇（PVE）是一种新型制冷剂替代润滑剂。研究了PVE的摩擦磨损特性。通过对PVE的摩擦磨损性能、与HFC的溶解度、抗毛细管限制性能、压缩机耐久性等方面与聚脂POE和聚烷基乙二醇pa2进行比较，证实PVE是一种优良的润滑剂。边界膜有吸附膜和固化膜两种类型。PVE固化膜比POE和PAG吸附膜表现出更高的承载能力。此外，对POE基本无效的脂肪酸等添加剂改善了与pve的摩擦磨损特性。溶解的HFC134a降低了润滑油粘度，使其磨损特性变差。随着HFC134a的溶解度与润滑油平均分子量之比的增加，粘度降低幅度减小。使用极性润滑剂POE和PAG时，Al-Si合金与合金钢之间发生了粘附，并促进了Al-Si合金向钢的转移。在HFC134a中，氟化物在Al -Si合金表面形成，氟化物具有防止磨损的能力。

Polyvinylether PVE has been developed as a new lubricant for alternative refrigerant. The friction and wear characteristics of PVE were studied.1.PVE was confirmed to be an excellent lubricant on estimating the friction and wear performance, solubility with HFC, resistance of capillary tube restriction, and compressor durability compared with polyolester POE and Polyalkyleneglycol PAG.2.There are two types of boundary film, adsorbed film and solidified film. The solidified film of PVE exhibited the higher load carrying ability than the adsorbed film of POE and PAG.Furthermore, additives such as fatty acids largely ineffective with POE improved the friction and wear characteristics with PVE.3.The decrease in lubricant viscosity by dissolved HFC134a made the wear characteristics worse. The viscosity reduction decreased with an increase in the ratio of solubility of HFC134a to the mean molecular weight of lubricant.4.With polar lubricants POE and PAG adhesion between Al-Si alloy and mated steel occurred, and transfer of the Al-Si alloy to the steel was promoted. In HFC134a fluorides were formed on Al -Si alloy surfaces The fluorides had an ability to prevent wear.