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Friction and Wear Characteristics of Lubricants and Additives in Alternative Refrigerant Atmosphere

替代制冷剂气氛中润滑剂和添加剂的摩擦磨损特性

基本信息

批准号：
05650146
负责人：
YAMAMOTO Yuji
金额：
$ 1.54万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

Friction and wear characteristics in an alternative refrigerant HFC134a were investigated using a ball-on-plate type machine. Lubricants used were polyalkylene glycol (PAG) and polyol ester (PEO) , which have excellent mutual solubility with HFC134a and paraffin base oil P150 with poor mutual solubility. Additives were arly-type phosphate ester TCP,alkyl-type phosphate ester TOP,and organomolybdenum compound MoDTC.The results obtained are as follows.1. HFC134a formed fluoride on rubbing surfaces, which improved the friction and wear characteristics.2. In general, PAG showed good wear performance compared with POE and P150. POE,however, exhibited excellent frictional performance with a low friction coefficient below the transition temperature of about 150ﾟC.The friction coefficient with PAG was as high as 0.1 in a low temperature range, and gradually increased at high temperatures.3. TCP improved friction and wear performance as a result of forming iron phosphate with PAG and P150. Since POE with high adsorption ability, however, prevent the adsorption of TCP onto rubbing surface, the addition of TCP was ineffective. TOP with high reactivity and poor adsorption ability scarcely enhanced tribological performance of the oils. MoDTC significantly improved the friction and wear performance of all oils used as a result of the formation of MoS2.4. By observing the oil film behavior using optical interferometry, It was found that the oil film thickness with PAG and POE gradually reduced with time as HFC134a dissolved into the oils. The reduction in oil film brought about the breakdown of the oil film leading to an increase in friction and wear. The boundary and extreme lubrication ability of oils is considered to be most important.

使用球盘式机器研究了替代制冷剂 HFC134a 的摩擦和磨损特性。所用润滑剂为聚亚烷基二醇（PAG）和多元醇酯（PEO），它们与互溶性较差的HFC134a和石蜡基础油P150具有良好的互溶性。添加剂为芳基型磷酸酯TCP、烷基型磷酸酯TOP、有机钼化合物MoDTC。所得结果如下： 1． HFC134a在摩擦表面形成氟化物，改善了摩擦磨损特性。2．总体而言，与POE和P150相比，PAG表现出良好的耐磨性能。而POE则表现出优异的摩擦性能，在150℃左右的转变温度以下具有较低的摩擦系数。与PAG的摩擦系数在低温范围内高达0.1，在高温下逐渐增大。3． TCP 通过与 PAG 和 P150 形成磷酸铁来改善摩擦和磨损性能。然而，由于POE具有高吸附能力，阻碍了TCP在摩擦表面的吸附，因此添加TCP是无效的。 TOP反应活性高，吸附能力差，对油品的摩擦学性能几乎没有提高。 MoDTC 由于形成 MoS2.4 而显着改善了所有使用的油品的摩擦和磨损性能。通过光学干涉法观察油膜行为，发现随着HFC134a溶解到油中，PAG和POE的油膜厚度随着时间逐渐减小。油膜减少导致油膜破裂，导致摩擦和磨损增加。油的边界和极限润滑能力被认为是最重要的。