Deflection roller with mechanical stop

Abstract

A roller ( ) for the pressure treatment of fabric webs includes a hollow cylinder ( ), rotatable about its axis A and bearing the working roller periphery ( ). A non-rotatable crosshead ( ) extends through the hollow cylinder ( ) along its length, leaving all around a distance with respect to the inner circumference ( ) of the hollow cylinder ( ). The cylinder ( ) is supported at the ends on external support pieces. A support device ( ) is arranged on the crosshead ( ) and acts radially in the active plane (W) of the roller ( ) against the inner circumference ( ) of the hollow cylinder ( ). The support device transmits from the crosshead ( ) to the hollow cylinder ( ) the forces that are necessary for creating the line forces exerted by the roller ( ). Provided laterally on the crosshead ( ) is a hydrostatic support element ( ) acting radially perpendicular to the active plane (W) of the roller ( ) against the inner circumference ( ) of the hollow cylinder ( ). The hydrostatic support element ( ) is hydraulically extendable against the inner circumference ( ) of the hollow cylinder ( ) and has on the exterior side an arrangement of hydrostatic bearing pockets ( ) that are open towards the inner circumference ( ) of the hollow cylinder ( ). The bearing pocket arrangement ( ) of the lateral support element ( ) can be acted upon in a throttle-free manner by a hydraulic fluid quantity that is constant over time. For the lateral support element ( ), a mechanical limit stop ( ) is provided for limiting the lateral extension motion.