Abstract: A seal comprising a bellows and a shielding plate. The bellows extending from an interior wall of a housing and surrounding a fluid flow passage urges a shoe into sealing contact with an end face of a wheel type heat accumulator. The shielding plate inside the bellows protects the bellows from thermal variations.

Abstract: A heat accumulating member for a rotary heat-accumulation type heat exchanger of a gas turbine engine, in which a flat sheet and a corrugated sheet are wound around a hub rotatably mounted in the heat exchanger. The flat sheet has a thickness of about 2.5 times that of the corrugated sheet whereby deformation of the heat accumulating member due to gas pressure and high temperature of gases is prevented.

Abstract: A disc type matrix is constructed by spirally winding as a unit a flat sheet metal strip and a longitudinally corrugated sheet metal strip. The outermost layer of the matrix is formed with the flat sheet metal strip and has, on the circumferential surface thereof, a plurality of recesses for receiving coupling members which are arranged to couple the matrix and a driving ring gear member.

Abstract: A sealing member for a rotary heat-accumulator type heat exchanger for a gas turbine engine, in which a hollow cover having a plurality of holes is provided between a sliding plate and a shield panel of a heat accumulator. Low-temperature, high pressure air is forced to flow through the holes of the cover into high-temperature air side of the heat accumulator, whereby portions of the sealing member are effectively cooled.

Abstract: A seal assembly for providing seal between an end face of a cylindrical and rotatable heat-transferring member and an opposite surface of a stationary member of the heat exchanger, having a loop-shaped and cross-sectionally rectangular seal member of a heat-resistant and rigid material, a loop-shaped groove formed in the surface of the stationary member to loosely receive the seal member, a loop-shaped back-up member of a resilient material tightly received in the bottom of the groove such that the seal member is sandwiched with a compressive force between the back-up member and the end face of the heat-transferring member, and a loop-shaped auxiliary seal member of a resilient material arranged to provide seal between the outer surface of the seal member and the outer wall of the groove and press the seal member against the inner wall of the groove.

Abstract: A seal assembly comprising a seal member which is placed on an end face of a cylindrical and rotatable heat-transferring member by the support of connecting pins secured to a housing member of the heat exchanger, a support plate fixedly placed on a surface of the housing member opposite to and spaced from the end face of the heat-transferring member, and a resilient shield plate which is not joined with the seal member but is fixed at one end to the support plate to extend obliquely such that an acute angle is formed between the support plate and one side of the shield plate to be exposed to a fluid of a higher pressure, until its free end comes into contact with the seal member.

Abstract: A seal assembly comprising a seal element mounted on an interior wall of a casing having a porous carbon sealing face, and urging means to urge the seal element into sealing engagement with an adjacent end of a rotary heat accumulator rotatable within the casing.