Heat transmission roll and a method and an apparatus for manufacturing such a roll

A roll type laminated heat exchanger structure having a longitudinally extending rotational axis defining a plurality of longitudinally extending, substantially uninterrupted flow channels comprising a first corrugated member having alternately disposed, longitudinally extending crests and valleys defining longitudinally extending gaps therebetween, said crests and said valleys each being formed with a plurality of transversely aligned surface discontinuities therein formed by deformations of the material thereof, and a second corrugated member engaged with one side of said first member and having a plurality of transversely extending surface discontinuities adapted to interlock with transversely aligned surface discontinuities in the peaks of said first member when received on the upper side thereof to interlock said first and said second members together.

A heat exchanger comprising two metal webs arranged in superposed relationship and wound about a core, a first of said webs being formed with corrugations extending in the crosswise web direction, said corrugations forming axially extending channels throughout said heat exchanger, said heat exchanger forming, in its operational condition, a rotating wheel wherein the exchange of heat is obtained by rotating the wheel between flows of fluid of different temperatures so that said fluid flows exchange heat with the walls of said channels, said two webs being joined together through mutual frictional abutment, said second web being highly tensioned in its lengthwise direction, whereby the two webs will be pressed hard together, said second web being attached at its outer end relative to the rest of the wheel, said second web having a wavy configuration with said waves extending in the lengthwise web direction, said waves pressing into the ridges and depressions of the corrugations formed in said first web for interlocking said webs together.

An improved method of manufacturing rolls consisting of two superposed webs of material wound about a core sleeve having a longitudinal axis about which the roll rotates in use, comprising rotatably driving said core sleeve, winding onto said sleeve said two superposed webs of material, the first one of said webs formed with transverse ridges defining substantially unrestricted flow channels extending parallel to the longitudinal axis of said core sleeve and the second one of said webs formed with lengthwise ribs, the improved method comprising the steps of forming transversely aligned sets of surface discontinuities on said ridges in said first web at the ridge tops as well as the ridge bases, said discontinuities having a pitch matching that of said ribs formed in said second web, and guiding at least one of said webs to securely position said ribs in engagement with said discontinuities for mechanically interlocking said webs.

A method of manufacturing heat exchanging wheels comprising the steps of corrugating a web of material, forming respective outwardly extending projections in the crests of at least one side of the corrugated web and extending transversely to the corrugations at a height of less than the depth of the corrugations, corrugating a second web of material, winding the corrugated webs onto a core which defines the axis of rotation of the heat exchanger wheel, applying a pressure upon the first of the webs during said winding in the radial direction of the wheel sufficient to press the projections formed in the first web into matching recesses formed in the other web for interlocking the webs together.

An apparatus for manufacture of a heat-exchanger roll, said apparatus comprising a first station for profile rolling a first web of material, said first station including means for corrugating the first web to impart crosswise ridges and grooves to the first web, the ridge crests and groove bottoms provided, respectively, with protrusions, a second station for forming lengthwise ribs in the second web, and a winding-on station for winding the two webs onto one another about a core in superposed relationship and means for pressing the two webs together and to exert a retarding action thereon in order to impart a longitudinal tension in the webs when they are wound into the roll in the winding-on station.