| 摘要 |
1,202,020. Thermal regenerators. FORD MOTOR CO. Ltd. 8 Aug., 1969 [29 Aug., 1968], No. 39800/69. Heading F4K. A ceramic, axial-flow, rotatable matrix core 22 in a thermal regenerator has around its periphery an elastomeric pad 24 which transmits driving torque to the core from driving means extending around and contacting the pad. The preferred driving means as shown is a metal ring gear 28, 30, driven by a pinion 32. Alternatively a friction drive may be used. The pad 24 may be made of a foamed silicon rubber and is ieldable in both axial and radial directions to absorb thermally induced stresses between the core and driving member. The pad may be cast in position or may comprise an extruded strip, grooved on one or both faces and stretched around the core, the ring gear being fitted so as to compress the pad. The regenerator is intended for use with a gas turbine engine and, as shown, the rotary core is mounted in a stationary housing consisting of a ceramic inner portion 12 and a metal outer portion 10, 42. The turbine exhaust gases flow to the matrix via a passage 17 and exhaust through a space 46 to atmosphere. Air to be heated passes to the matrix via a passage 13 which extends completely around the core so providing a cool environment for the pad and ring gear. The heated air leaves the matrix through a passage 16. The matrix seals comprise a D-shaped seal 38 in rubbing contact with the matrix end face. The seal 38 may be of metal with a wearing surface (unspecified) on its underside suitable for use on ceramics. A metal foil seal 40 is welded to the top inner edge of seal 38. At the underside of the matrix is a solid ceramic rubbing seal 18. The seal is restrained from circular movement by ribs 20 thereon fitting into corresponding slots in the housing portion 12; or the seal 18 may be integral with the housing portion 12. |
