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    CRYOGENIC COOLER WITH MECHANICALLY-FLEXIBLE THERMAL INTERFACE
    1.
    发明公开
    CRYOGENIC COOLER WITH MECHANICALLY-FLEXIBLE THERMAL INTERFACE 有权
    有机械柔性热连接低温冷却器

    公开(公告)号：EP0986724A1

    公开(公告)日：2000-03-22

    申请号：EP99915249.9

    申请日：1999-04-01

    申请人： Raytheon Company

    发明人： ROSS, Bradley, A. ,  THOMPSON, Robert, M.

    IPC分类号： F25D19/00 ,  F25B9/14

    CPC分类号： G01J5/061 ,  F25B9/14 ,  F25D19/006

    摘要： A cryogenic cooler and a dewar assembly including a cooled surface (30); a cooling surface (20) for removing thermal energy from said cooled surface (30); and an adapter (40) disposed between said cooling surface and the cooled surface for conducting thermal energy therebetween. A first fluid is disposed between the cooled surface (30) and the adapter (40) for conducting thermal energy from the cooled surface to the adapter. A second fluid is disposed between the cooling surface (20) and the adapter (40) for conducting thermal energy from the adapter to the cooling surface whereby the cooling surface remains free to move axially relative to the adapter (40) at a temperature of the cooling surface at which the first fluid is susceptible to freezing. This allows for movement of the cold finger relative to the dewar and adapter, due to differential thermal coefficients of expansion or support structure motion, without adversely affecting the communication of thermal energy from the load. In the illustrative embodiment, the cooler is a Stirling cycle cooler, the first fluid is thermal grease and the second fluid is nitrogen. The cooling surface (20) is a cylindrical cold finger of the Stirling cycle cooler and the cooled surface (30) is an inner wall of a dewar assembly. The dewar is in thermal contact with a load. The adapter is disposed between the inner wall (29) of the dewar and the cold finger. The adapter (40) has an end cap (42) and a cylindrical housing (44) extending therefrom. The housing (44) extends at least partially along a longitudinal axis of the cold finger (20). An insulator is disposed about the cold finger and the adapter housing. A spring (52) is disposed between a proximal end of the insulator (50) and a base of the cold finger (20) to maintain a distal end of the insulator (50) in contact with the adapter and the adapter (40) in contact with the dewar.

    LOW WEAR PISTON SLEEVE
    3.
    发明公开
    LOW WEAR PISTON SLEEVE 审中-公开
    具有低磨损活塞盖

    公开(公告)号：EP1893897A1

    公开(公告)日：2008-03-05

    申请号：EP06816576.0

    申请日：2006-10-10

    申请人： Raytheon Company

    发明人： ROSS, Bradley, A. ,  BREST, Michael, L. ,  RAJAN, Sunder, S.

    IPC分类号： F16J10/04 ,  F25B9/14

    CPC分类号： F04B15/08 ,  F04B39/0005 ,  F04B39/126 ,  F05C2225/04 ,  F05C2225/12 ,  F05C2251/14 ,  F05C2253/18 ,  F16J10/04 ,  F25B9/14

    摘要： Provided is a low friction, self-lubricating sleeve (104) for use with a reciprocating piston (102) in the compressor (100) and/or the expander subsystem of a cryogenic cooler or other compressor type system. The sleeve is bonded to an outer surface of the piston, thereby positioning the sleeve between the piston and an inner wall (110) of a piston cylinder (106) . The sleeve is manufactured using a polyetheretherketone base material, as well as varying percentages of carbon and/or polytetraf luoroethylene fillers. The sleeve may include a dry lubricant such as graphite or molybdenum disulfide, and may extend for all or part of the length of the piston. The sleeve demonstrates negligible wear over thousands of hours of use in the cryogenic cooler, thereby minimizing system gas blow-back and maximizing system efficiency/performance .

    CRYOGENIC COOLER WITH MECHANICALLY-FLEXIBLE THERMAL INTERFACE
    5.
    发明授权
    CRYOGENIC COOLER WITH MECHANICALLY-FLEXIBLE THERMAL INTERFACE 有权
    有机械柔性热连接低温冷却器

    公开(公告)号：EP0986724B1

    公开(公告)日：2002-11-20

    申请号：EP99915249.9

    申请日：1999-04-01

    申请人： Raytheon Company

    发明人： ROSS, Bradley, A. ,  THOMPSON, Robert, M.

    IPC分类号： F25D19/00 ,  F25B9/14

    CPC分类号： G01J5/061 ,  F25B9/14 ,  F25D19/006

    摘要： A cryogenic cooler and a dewar assembly including a cooled surface (30); a cooling surface (20) for removing thermal energy from said cooled surface (30); and an adapter (40) disposed between said cooling surface and the cooled surface for conducting thermal energy therebetween. A first fluid is disposed between the cooled surface (30) and the adapter (40) for conducting thermal energy from the cooled surface to the adapter. A second fluid is disposed between the cooling surface (20) and the adapter (40) for conducting thermal energy from the adapter to the cooling surface whereby the cooling surface remains free to move axially relative to the adapter (40) at a temperature of the cooling surface at which the first fluid is susceptible to freezing. This allows for movement of the cold finger relative to the dewar and adapter, due to differential thermal coefficients of expansion or support structure motion, without adversely affecting the communication of thermal energy from the load. In the illustrative embodiment, the cooler is a Stirling cycle cooler, the first fluid is thermal grease and the second fluid is nitrogen. The cooling surface (20) is a cylindrical cold finger of the Stirling cycle cooler and the cooled surface (30) is an inner wall of a dewar assembly. The dewar is in thermal contact with a load. The adapter is disposed between the inner wall (29) of the dewar and the cold finger. The adapter (40) has an end cap (42) and a cylindrical housing (44) extending therefrom. The housing (44) extends at least partially along a longitudinal axis of the cold finger (20). An insulator is disposed about the cold finger and the adapter housing. A spring (52) is disposed between a proximal end of the insulator (50) and a base of the cold finger (20) to maintain a distal end of the insulator (50) in contact with the adapter and the adapter (40) in contact with the dewar.