斯特林制冷机无油润滑间隙密封的设计与研究

传统的制冷机回热器常使用接触式滑动密封,存在磨损,限制了制冷机的使用寿命.间隙密封的应用则可以避免这些问题.斯特林制冷机的密封关键在于气缸与活塞的间隙密封,能否有效地将其密封直接影响了斯特林制冷机的性能与可靠性.斯特林制冷机回热器采用间隙密封,这种密封方式不仅可以达到密封的目的,同时可以消除因密封面接触而产生的磨损,以及因此而产生的磨损污染.但是,由于间隙内气体的泄漏,引起了冷量的损失,使制冷量减少.因此在间隙密封的设计中要合理设计间隙的大小以及间隙的偏心度,以确保密封的有效性及其使用寿命.

The Stirling Refrigerator non -Lubricated Seal Gaps Design and Research

Its working life is limited because the sliding bearing seal is used and the friction exists in the regenerator of traditional Stirling cooler. The key of Stirling refrigerator seal is cylinder and piston clearance seal, the ability to effectively seal directly affect the performance and reliability of the Stirling refrigerator. The method of clearance seal can achieve the effect of the seal between the regenerator and cylinder wall while eliminating contact between them in the regenerator of Stirling refrigerator. Thus it eliminates wear and another source of wear in the refrigerator of Stirling refrigerator. But, the result of the gas leakage of clearance seal caused the leakage losses and the reduction of the cooling power. It must be reasonable to design the size of the gap and the gap eccentricity that ensure the effectiveness of sealing and to ensure the refrigerator＇s long life.