公开(公告)号：US20170241434A1

公开(公告)日：2017-08-24

申请号：US15046568

申请日：2016-02-18

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Thomas VEITCH ,  Tibor URAC ,  Tyler RICHARDSON

IPC: F04D29/52 ,  F04D29/28

CPC classification number: F04D29/526 ,  F01D25/162 ,  F01D25/24 ,  F01D25/243 ,  F04D29/284 ,  F04D29/644 ,  Y10T403/7062 ,  Y10T403/7067 ,  Y10T403/7069

Abstract: A gas turbine engine casing apparatus includes annular first and second annular cases connected by a spigot joint. The spigot joint includes an annular projection of the first annular case fitted into an annular recess of the second annular case. A plurality of circumferentially spaced apart scallops are formed on one of surfaces of the annular projection or of the annular recess, and are located in selective circumferential locations adjacent respective enhanced stiff areas of the first and second annular cases.

公开(公告)号：US20160290506A1

公开(公告)日：2016-10-06

申请号：US14673937

申请日：2015-03-31

Applicant: PRATT & WHITNEY CANADA CORP.

Inventor： Tibor URAC ,  Bernard CHOW

IPC: F16J9/06

CPC classification number: F16J9/06 ,  F16J9/12 ,  F16J15/3208 ,  F16J15/56

Abstract: A cylindrical seal apparatus according to one embodiment includes a split spring ring and a split seal ring supported in a groove for example defined in a piston. The split spring ring in a tensioning condition presses against a tapered annular inner surface of the split seal ring to create a radial pre-load and an axial pre-load to the slit seal ring to establish a primary sealing contact between the seal ring and a cylinder, and a second sealing condition between the seal ring and a lower-pressure side of the groove, before the working fluid pressure is built up.

Abstract translation: 根据一个实施例的圆柱形密封装置包括裂缝弹簧环和支撑在例如在活塞中限定的凹槽中的分裂密封环。 在张紧状态下的裂缝弹簧环压靠在分离密封环的锥形环形内表面上，以产生向狭缝密封环的径向预载荷和轴向预载荷，以在密封环和密封环之间建立主密封接触 在工作流体压力建立之前，密封环和槽的低压侧之间的第二密封状态。