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US 4,048,701 AGranted
Deflection compensating roll
AssigneeEscher Wyss Limited
InventorIgnazio Marchioro
Life of this patent
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AssigneeEscher Wyss Limited
InventorIgnazio Marchioro
Estimating the term…
A deflection compensating roll is disclosed which comprises a support beam, a roll shell rotatably mounted about and defining with said beam an intermediate space therebetween and at least one hydrostatic support element engaged between the beam and the shell for exerting a force against the interior of the shell. The surface of the support element facing the interior of the shell is provided with a plurality of recesses which are supplied with fluid so that a hydrostatic fluid cushion is formed between the face of the support element and the interior of the roll shell. The beam has a longitudinally extending chamber and means for sealing a first region of the chamber which communicates with the fluid receiving recesses from a second region of the chamber which communicates with the intermediate space between the beam and the shell. The first and second regions of the chamber respectively define a conduit for supplying fluid to the support element and a conduit for discharging fluid flowing into the intermediate space from the recesses. The sealing means may include a tubular member disposed in the chamber with the end portions thereof being in fluid-tight engagement with the wall of the chamber. In this arrangement, the annular space between the outer surface of the tubular member and the wall of the chamber communicates with the intermediate space between the beam and the shell and serves as the conduit for discharge of the fluid, while the interior of the tube communicates with the recesses in the support element and serves as the conduit for supplying fluid thereto. A device such as a scoop ring disposed in the intermediate space may be provided for feeding fluid from the intermediate space to the annular space between the tubular member and the wall of the chamber.
A deflection compensating roll which comprises a stationary support beam, a roll shell rotatably mounted about and defining with said beam an intermediate space therebetween, and at least one hydrostatic support element engaged between said beam and said shell for exerting a force against the interior of said shell, the end portion of each support element facing the interior of said shell having at least one fluid receiving recess formed therein and communicating with said intermediate space, said beam having an internal longitudinally extending chamber and means for sealing a first region of said chamber from a second region thereof, said first region of said chamber communicating with each fluid receiving recess and defining a conduit for supplying pressure fluid thereto, said second region of said chamber communicating with said intermediate space and defining a conduit for discharging from said intermediate space fluid flowing thereto from said recess.
A deflection compensating roll which comprises a support beam, a roll shell rotatably mounted about and defining with said beam an intermediate space therebetween, and at least one hydrostatic support element movably mounted in a cavity formed in said beam for exerting a force against the inner surface of said shell, the end portion of said support element facing the interior of said shell having a plurality of fluid receiving recesses formed therein which communicate with said intermediate space, each of said recesses being connected with said cavity by a throttling passage extending through said support element, said beam having a longitudinally extending bore, a duct for connecting said cavity with said bore, a tubular member disposed in said bore, the outer surface of said tubular member and the wall of said bore defining an annular space therebetween, and means for sealing said annular space from the remaining portion of said bore, the interior of said tubular member being in communication with said duct and defining a conduit for supplying pressure fluid to said cavity, said annular space being connected with said intermediate space by an additional duct formed in said beam and defining a conduit for discharging from said intermediate space fluid flowing thereto from said recesses.
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
By fluid pressure: with a plurality of supports along the length of the roll mantle, e.g. hydraulic jacks
Common details of rotary presses or machines: cylinders
With deflection compensation means acting between the roller shell and its supporting member: the means using fluid pressure
Rolls, drums, discs, or the like ; Bearings or mountings therefor: bearings
Term ended 20 Sep 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to a deflection compensating press roll.
2. Description of the Prior Art
Other objects, features and advantages of the invention will be apparent from the following description thereof with reference to the accompanying drawings, in which:
FIG. 1 is a sectional view of a deflection compensating roll according to the invention;
FIG. 2 is a sectional view taking along line II--II of FIG. 1;
Referring now to the drawings, FIG. 1 shows a deflection compensating roll of the type described in U.S. Pat. Nos. 3,802,044 and 3,885,283. The roll comprises a stationary beam 1 supported in spherical bearings 2 mounted in a frame 3 and secured against rotation by a pin 4. A cylindrical roll shell 5 is rotatably mounted about the support beam 1 and is pressed by hydrostatic support elements 6 against a co-acting roll 7, which is also mounted in the frame 3 by bearings (not shown).
The hydrostatic support elements 6 may preferably be of the construction described in U.S. Pat. No. 3,802,044, and are in the form of pistons seated in seal-tight relationship in bores or cylinders 8 formed in the beam 1. The support elements 6 are guidably displaceable in a substantially radial direction with respect to the axis of the roll and are also tiltable in the associated cylinders 8. The running or bearing surfaces of the support elements 6 facing the inner surface 10 of the roll shell 5 are provided with hydrostatic fluid pockets 11 which are connected to the associated cylinders 8 by throttle bores 12.
As shown in FIGS. 1 and 3, a guide ring 13 is rotatably mounted within each end of the roll shell 5. The guide rings 13 may be of the type described in U.S. Pat. No. 3,885,283 which have elongated apertures 14 with flat parallel guide surfaces 15 which are in sliding engagement with mating parallel guide surfaces 16 on the support beam 1. The elongated apertures 14 of the guide rings 13 permit the roll shell 5 to move laterally with respect to the beam 1 in the plane of the hydrostatic support elements 6 and hence the axes of the bores 8.