Bearings – Rotary bearing – Plain bearing
Reexamination Certificate
1999-06-02
2001-09-11
Lorence, Richard M. (Department: 3681)
Bearings
Rotary bearing
Plain bearing
C384S026000, C384S042000, C198S806000
Reexamination Certificate
active
06287008
ABSTRACT:
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates to a device for adjusting one of the bearing blocks of a roller in a roller group for supporting and moving an endless moved web, such as the traveling screen or conveyor belt in a papermaking plant. The bearing block is disposed on a slide which is adjustable along at least one guide rail and which can be adjusted relative to a carrying structure in the conveying direction of the roller section by an actuating device. As a result, the angular position of the roller mounted in the bearing block is variable relative to the conveying direction of the roller section.
In plants in which an endless moved web is guided via a multiplicity of mutually adjacent rollers, such as, for example, in a papermaking plant using a traveling screen which is guided via a multiplicity of successive rollers, there is the requirement that the direction of movement of the band coincides exactly with the conveying direction of the roller section. By contrast, insofar as the direction of movement of the band deviates from the conveying direction of the roller section due to irregularities in the band or rollers or for other reasons, with the result that the direction of movement of the band forms an acute angle with the conveying direction of the roller section, this not only leads to inadmissible loads on the band, but, moreover, the band may creep laterally out of the roller section, thus causing operating faults.
It has been known in the art, for monitoring the direction of movement of the band which is guided via a roller section, to provide a measuring means, by which inadmissible deviations of the direction of movement of the band from the conveying direction of the roller section are detected. In response to the monitoring it is possible to take corrective mn in order to correct the direction of movement of the band. Correction is possible, in this case, due to the fact that the angular position of one or a plurality of the rollers of the roller section is varied slightly.
The orientation of a roller of the roller section can be varied by adjusting one of the two bearing blocks in the conveying direction of the roller section. For that purpose, a piston/cylinder assembly is arranged below the bearing block. The cylinder is thereby rigidly fastened in the structure of the plant below the bearing block and, furthermore, the bearing block is carried by the piston which can be adjusted in the conveying direction of the roller section within the cylinder. By the displacement of the piston, the angular orientation of the roller carried by the bearing block relative to the conveying direction of the roller section can be adjusted, with the result that the direction of movement of the band can be influenced.
The prior art system is disadvantageous, however, in that the forces absorbed by the bearing block are transmitted via the piston to the cylinder, thus causing a high load to be exerted on the seals between the piston and the cylinder. Moreover, the prior art device is disadvantageous in that the piston/cylinder assembly is located below the associated bearing block. Access to the piston/cylinder assembly for maintenance or repair is difficult.
European published patent application EP 733 736 A2 discloses a device that avoids this disadvantage by providing, on the slide, a carriage which is provided with running rollers and which can be moved relative to the carrying structure by a further actuator. Even though that prior art device is advantageous relative to the previously known art, it nevertheless has the disadvantage that it must be dismantled completely if the running rollers or other components are damaged or broken, so that the damaged or inoperative components can be removed and replaced with new components.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention to provide a device for adjusting a bearing block of a roller in a roller group, which overcomes the above-mentioned disadvantages of the heretofore-known devices and methods of this general type and which avoids components, such as running rollers, which are at risk of breakage or are susceptible to faults, and in which the components exposed to wear due to the actuating movements are easily accessible and can be exchanged, without the entire device having to be dismantled.
With the foregoing and other objects in view there is provided, in accordance with the invention, a device for adjusting a bearing block of a roller supporting an endless web traveling along a conveying direction, such as, for instance, a traveling screen, a conveyor belt, or the like in a papermaking plant. The device comprises:
a carrying structure, such as a stationary machine frame, and at least one guide rail (or a plurality of mutually spaced-apart, parallel guide rails) mounted to the carrying structure;
a slide connected to and adjustable along the guide rail;
a bearing block disposed on the slide;
an adjusting actuator for adjusting the slide along the guide rail for displacing the slide relative to the carrying structure in a conveying direction; and
a sliding element of a highly slideable material releasably fastened on the slide and arranged between the slide and the guide rail.
By adjusting the bearing block of a lateral roller bearing, the orientation of the rotational axis of the roller is adjusted relative to the conveying direction of a web supported on the roller.
In accordance with an added feature of the invention, a fastening element is releasably fastened to the slide for fixing a position of the sliding element.
In accordance with an additional feature of the invention, the guide rail is a cylindrical rod, and the sliding element is a sleeve.
In accordance with another feature of the invention, the sliding element is a slotted sleeve.
In accordance with a further feature of the invention, the sliding element is a multipart sliding element, for instance a two-part sliding element.
In accordance with again an added feature of the invention, the sliding element is formed with a profiling on its outer peripheral surface and its inner peripheral surface.
In accordance with again an additional feature of the invention, the profiling comprises ribs extending in an actuating direction, i.e. parallel to the guide rail.
In accordance with a concomitant feature of the invention, the sliding element is formed with an annular rib on its outer peripheral surface, and the slide is formed with a corresponding annular groove adapted to receive the annular rib.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a device for adjusting one of the bearing blocks of a roller in a roller group, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
REFERENCES:
patent: 2602708 (1952-07-01), Wheildon, Jr.
patent: 3043062 (1962-07-01), Wettstein
patent: 3333513 (1967-08-01), Wettstein
patent: 3921793 (1975-11-01), Hutchinson et al.
patent: 4518205 (1985-05-01), Heathe
patent: 4544061 (1985-10-01), Crandall
patent: 5033869 (1991-07-01), Kingston et al.
patent: 5054608 (1991-10-01), Bryant
patent: 5699898 (1997-12-01), Bartelmuss et al.
patent: 5749659 (1998-05-01), Nisley
patent: 5758545 (1998-06-01), Fevre et al.
patent: 5887982 (1999-03-01), Wilcher
patent: 5896979 (1999-04-01), Hokari et al.
patent: 0733736A2 (1996-09-01), None
Bartelmuss Heinz
Bartelmuss Klaus
Greenberg Laurence A.
Lerner Herbert L.
Lorence Richard M.
Pang Roger
Stemer Werner H.
LandOfFree
Device for adjusting a bearing block of a roller in a roller... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for adjusting a bearing block of a roller in a roller..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for adjusting a bearing block of a roller in a roller... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2487819