Mayank Singhal, Rajesh Kumar, R. S. Walia, Sanjay Kumar Pandey
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引用次数: 0
Abstract
The Stirling cryocoolers are widely used in the military and aerospace fields due to advantages such as high efficiency and compact structure. The pistons of these coolers with very small clearances operate at high speed and without lubrication. Piston failure in the coolers has often affected the operational life of the cooler. The objective of the study was to find a solution to piston failure by providing a surface coat to the pistons, carrying out their tribological evaluation, and analyse cooler thermal performance to identify the better of two coatings for field applications. In the present experimental study, a Stirling cooler developed with a cooling capacity of 0.5 W @80 K with Helium as the working fluid was integrated with surface-coated pistons and tested for its mechanical and thermal performance. On testing, DLC coating exhibits better wear resistance than TiN coating and therefore is a more suitable coating for cryocooler pistons. The present study clearly shows that DLC-coated pistons reduce power consumption and increase the number of operational hours of miniature Stirling cryocoolers.
斯特林低温冷却器具有效率高、结构紧凑等优点,被广泛应用于军事和航空航天领域。这些冷却器的活塞间隙非常小,可在无润滑的情况下高速运转。冷却器活塞的故障往往会影响冷却器的使用寿命。这项研究的目的是通过为活塞提供表面涂层、对其进行摩擦学评估以及分析冷却器的热性能来找到解决活塞故障的方法,从而确定两种涂层中哪一种更适合现场应用。在本实验研究中,开发了一种斯特林冷却器,冷却能力为 0.5 W @ 80 K,工作流体为氦气,该冷却器与表面涂层活塞集成,并对其机械和热性能进行了测试。经测试,DLC 涂层比 TiN 涂层具有更好的耐磨性,因此更适合用于低温冷却器活塞。本研究清楚地表明,DLC 涂层活塞可降低微型斯特林低温冷却器的功耗并增加其工作小时数。
期刊介绍:
MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology.
The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.