Thermo roll for paper machine, has annular groove arranged on end surfaces of end pieces and shell for receiving composite-structured elastic metal seal to prevent leaking of heat-transfer medium from flow channels

摘要

The roll has a shell (20) fastened between two end pieces (2), where flow channels (3, 4, 21, 22) are arranged in the shell to convey a heat-transfer medium. Annular grooves (30, 30.1) are arranged onto an end piece end surface (2') and a shell end surface (20') for receiving a composite-structured elastic metal seal (40) to prevent leaking of the heat-transfer medium from the flow channels. The seal is provided with a metal outer shell (42) around a flexible and reversible coil spring (41), which is opened from inside the seal.