Tribological Property of Alternative Refrigerant R134a in Practical condition

替代制冷剂 R134a 实际条件下的摩擦学特性

• 批准号: 08650171
• 负责人: NAKAMURA Takashi
• 金额: $ 1.28万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650171/
• 关键词: Tribology; Alternative refrigerant; Friction test; Reacted products; Lubricant; Additive; Surface treatment; 新冷媒; 潤滑剤; 表面コーティング

Alternative refrigerant R134a has been used for refrigerator, because CFC-12 destroys ozonosphere. Many tribological trouble came into existence when CFC-12 was exchanged for the alternative refrigerant. Countermeasures, for example, surface treatment, lubricant additives, were taken for trouble, and some problems are still unsolved. It is necessary to measure tibological properties of the alternative refrigerant in a practical condition.In the research for fiscal 1996, a pin-on-ring tribo-tester, which can reproduce a practical condition, was constructed, and preliminary tests were carried out for CFC-12 and HFC-134a. The disk surface is severely worn in the HFC-134a envioronment, especially starved lubricant condition. Surface analyzes show that chlorine in CFC-12 acts as a extreme pressure additive when a contacting point is left in a severe friction condition.In the research for fiscal 1997, effects of refrigerant oils, additives and surface treatment on the tribological property were studied in the starved libricant condition. Mineral oil and synthetic oil (PAG) were tested as the refrigeration oil. Experimental results showed that low affinity of the synthetic oil with a metal surface led the starved lubricant condition. tricresylphosphate (TCP) acted as an extreme pressure additive on behalf of the chlorine of CHC-12. Sn coating was effctive as the surface treatment, and it protect seizure for a long term in the starved lubricant condition. But this effect fell in a condition where the environment included oxygen.

由于CFC-12破坏臭氧层，冰箱采用了替代制冷剂R134 a。在用CFC-12替换替代制冷剂的过程中，出现了许多摩擦学问题。虽然采取了表面处理、润滑油添加剂等对策，但仍有一些问题没有解决。在1996财政年度的研究中，建造了一个能够再现实际情况的销-环摩擦试验机，并对CFC-12和HFC-134 a进行了初步试验。在HFC-134 a环境中，尤其是在缺油条件下，轮盘表面磨损严重。表面分析表明，CFC-12中的氯在接触点处于严重摩擦条件时起极压添加剂的作用，在1997年度的研究中，研究了冷冻油、添加剂和表面处理对贫润滑剂条件下摩擦学性能的影响。对矿物油和合成油（PAG）作为冷冻机油进行了试验。实验结果表明，合成油与金属表面的亲合力较低，导致了贫润滑状态。磷酸三甲苯酯（TCP）作为极压添加剂代表CHC-12的氯。锡镀层作为表面处理是有效的，在缺油条件下能长期防止咬死。但这种效果在环境包括氧气的条件下下降。

项目成果

中村 隆: "代替冷媒環境下での境界摩擦特性と軟質被覆の効果" トライボロジー会議予稿集 東京 1998-5. (1998)

Takashi Nakamura：“替代制冷剂环境下软涂层的边界摩擦特性和效果”摩擦学会议论文集东京 1998-5（1998）。

Takashi Nakamura, Tomio Matsubara, Fumihiro Itoigawa, Michiya Futamura: "Boundary Lubrication Property in Alternative Refrigerant Environment and Soft Coating effect" Proceeding of Tribology Conf.in Tokyo, May. (1998)

Takashi Nakamura、Tomio Matsubara、Fumihiro Itoikawa、Michiya Futamura：“替代制冷剂环境中的边界润滑特性和软涂层效果”，东京摩擦学会议论文集，5 月。

中村 隆: "代替冷媒環境下での境界摩擦特性と軟質被覆の効果" トライボロジー会議予稿集,東京,1998-5. (1998)

Takashi Nakamura：“替代制冷剂环境下软涂层的边界摩擦特性和影响”摩擦学会议论文集，东京，1998-5（1998）。