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.

替代制冷剂 R134a 已用于冰箱，因为 CFC-12 会破坏臭氧层。当 CFC-12 更换为替代制冷剂时，出现了许多摩擦学问题。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。有必要在实际条件下测量替代制冷剂的摩擦学特性。在 1996 财年的研究中，建造了可以再现实际条件的销环摩擦测试仪，并进行了初步测试CFC-12 和 HFC-134a。在HFC-134a环境下，特别是在缺乏润滑剂的情况下，磁盘表面磨损严重。表面分析表明，当接触点处于严重摩擦条件下时，CFC-12 中的氯起到极压添加剂的作用。在 1997 财年的研究中，研究了冷冻机油、添加剂和表面处理对摩擦性能的影响。饥饿的释放条件。测试了矿物油和合成油（PAG）作为冷冻油。实验结果表明，合成油与金属表面的低亲和力导致了润滑不足的情况。磷酸三甲苯酯（TCP）代表CHC-12的氯作为极压添加剂。锡涂层作为表面处理是有效的，并且它可以在缺乏润滑剂的条件下长期防止卡住。但当环境中含有氧气时，这种效果就会减弱。

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）。