Hydrostatic roll for use in calenders

Details Hydrostatic roll for use in calenders Hydrostatic roll for use in calenders

1991-09-20

1993-05-04

Gorski, Joseph M.

Roll or roller

With antideflection means

Rotatable relative to supporting shaft

492 5, 492 46, B21B 3132, B21B 1302

Patent

active

052069788

ABSTRACT:
A roll for use in a calender or a like machine has a carrier which is surrounded by a flexible cylindrical shell. One or more hydrostatic displacing units are installed between the carrier and the shell to deform, when necessary, one or more selected portions of the shell. Each displacing unit has a bearing element with an external surface which is closely adjacent the internal surface of the shell and has one or more pockets for reception of a heated pressurized hydraulic fluid. Each bearing element has a second surface which faces away from the external surface, and the respective displacing unit further comprises one or more plenum chambers adjacent the second surface of the bearing element. The pocket or pockets of the bearing element receive heated fluid from a first source, and the plenum chamber or chambers of the bearing element receive compressed oil or another hydraulic fluid from a second source which can include one or more parts of the first source or vice versa. Each plenum chamber can discharge a stream of oil by way of a flow restrictor to thus prevent stagnation and/or overheating of compressed oil therein. The thus discharged oil can be returned to the source of compressed oil.

REFERENCES:
patent: 4373238 (1983-02-01), Guttinger
patent: 4394793 (1983-07-01), Pav et al.
patent: 4625637 (1986-12-01), Pav
patent: 4757584 (1988-07-01), Pav
patent: 4903517 (1990-02-01), Van Haag
patent: 4955120 (1990-09-01), Brendel et al.
patent: 5033176 (1991-07-01), Schiel
patent: 5101544 (1992-04-01), Kubik

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