适用于R290 聚醚酯型冷冻机油的合成及性能研究

根据冷冻机运行实际工况,合成了一种油溶性聚醚酯,按照润滑油基础性能检测的国家标准对合成聚醚酯的基本理化性能进行检测。自制润滑油—冷媒在线粘度测试系统,并测定了季戊四醇酯、聚醚酯在不同丙烷(R290)蒸气压力下润滑油—冷媒混合体系的液相部分粘度。使用自制密封管对聚醚酯、季戊四醇酯及聚醚的热氧化安定性与金属腐蚀情况进行考察,结果表明聚醚酯综合性能优于参比油品。采用四球摩擦磨损试验机对该聚醚酯的摩擦学性能进行考察,结合压缩机台架实验结果表明聚醚酯的磨损量较矿物油、季戊四醇酯更低,使用聚醚酯作为丙烷制冷压缩机润滑油时能量转换率较矿物油提高1.7%。

Polyether Ester as Refrigeration Lubricant for R290: Synthesis and Performance

An oil-soluble polyether ester was synthesized according to the actual working conditions of the refrigerator, and the basic physical and chemical properties of synthetic esters were detected by national standards. To obtain the viscosity of pentaerythritol esters and polyether esters under various pressure of propane (R290), a laboratory-made lubricants-refrigerant online viscosity measurement system has been employed to measure the viscosity of the liquid fraction. Stability under practical conditions was tested by a sealed tube. It shows that the overall performance of polyether ester is better than the reference oil. Properties of the tribology have been tested by the four-ball wear tester. The results show that the wear amount of the polyether ester is less than the mineral oil and polyol esters, and polyether esters have better viscosity characteristics. The cooling efficiency is increased by 1.7% compared to mineral oil in the propane refrigeration system.