公开(公告)号：US5822994A

公开(公告)日：1998-10-20

申请号：US795972

申请日：1997-02-05

申请人： Daniel James Belk ,  Thomas S. Donahoe ,  Arthur R. Nelson ,  Gary W. Van Court

发明人： Daniel James Belk ,  Thomas S. Donahoe ,  Arthur R. Nelson ,  Gary W. Van Court

IPC分类号： F02G1/00 ,  F02G1/053 ,  F25B9/14 ,  F25B9/00

CPC分类号： F02G1/00 ,  F02G1/0535 ,  F25B9/14 ,  F25B2309/001

摘要： This invention provides a low friction linear clearance seal for use in closed cycle cryogenic coolers. The clearance seal comprises a cylinder, a piston mounted within the cylinder for reciprocating movement and a self lubricating polymer liner bonded to the piston which forms an effective seal around the piston. The clearance seal improves the sealing capability between the piston and the cylinder and reduces heat generated by the motion of the piston along the cylinder wall. The clearance seal also improves the performance and reliability of the cryogenic cooler.

摘要翻译： 本发明提供一种用于封闭循环低温冷却器的低摩擦线性间隙密封。 间隙密封件包括气缸，安装在气缸内用于往复运动的活塞和结合到活塞的自润滑聚合物衬套，其形成围绕活塞的有效密封。 间隙密封改善了活塞和气缸之间的密封能力，并减少了活塞沿气缸壁运动产生的热量。 间隙密封件还提高了低温冷却器的性能和可靠性。