Rotary storage heat exchanger structure

Claim 1

A seal for heat exchanger structure for multi-shaft motor vehicle gas turbines which includes in combination: housing means with inner first and second passage means for respectively conveying working air to a combustion chamber and conveying exhaust gases through said heat exchanger to a gas turbine, rotary storage heat exchanger means including rotatable disc-shaped storage body means with flow passage means extending substantially parallel to the axis of rotation of said storage body means for respectively passing hot exhaust gases and cooler compressed working air therethrough, said flow passage means communicating with said first and second passage means, said first and second passage means including housing web means separating said first and second passage means from each other, nozzle gap means provided along the extended plane of said housing web means and arranged within said housing means in spaced relationship to said storage body means, said nozzle gap means being connectable to a source of sealing compressed barrier air, said storage body means being located relative to said housing web means and said flow passage means so as to have play therebetween, guiding wall means associated with said storage body means and having a nose directed toward the same but in spaced relationship thereto, for deviating barrier air passing through said heat exchanger means into that one of said first and second passage means intended for conveying working air, said nose being located on that side which is adjacent the passage means for the exhaust gas.