Roll or roller – With antideflection means – Rotatable relative to supporting shaft
Patent
1992-09-23
1994-02-15
Eley, Timothy V.
Roll or roller
With antideflection means
Rotatable relative to supporting shaft
492 10, 492 20, B30B 304, B21B 1302
Patent
active
052862453
ABSTRACT:
A flexure compensated roll comprising a rotatable roll shell around a longitudinally extending support therethrough. A longitudinally extending press shoe supported on the support. A piston movably supported on the support above a sealed pressure space. The piston has a saddle toward the interior of the roll casing. The shoe has a middle pressure chamber fluid connected with the pressure space of the piston. The shoe also has rows of hydrostatic pockets on both circumferential sides of the middle chamber. These are supplied by narrowed choke passages with hydraulic fluid. The supply of hydraulic fluid to the hydrostatic pockets bypasses the piston pressure space and/or the middle chamber and is from a pressure source to the hydrostatic pockets without pressure regulation. A regulating valve controls the force between the longitudinal support and the casing of the roll by setting the pressure in the middle chamber and by setting the pressure in the piston pressure space. Details of the particular pressure regulation valve are also disclosed. The saddle at the top of the piston is swivelable about a swivel joint to adapt to the interior of the roll casing as it flexes. The hydraulically effective pressing area of the shoe is larger than the hydraulically effective area of the piston in the pressure space. A spring and/or an initial pressurization region in the pressure space initially raises the piston and shoe toward the interior of the roll casing.
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Eley Timothy V.
J.M. Voith & GmbH
LandOfFree
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