US3144905A

US3144905A - Roll construction

Info

Publication number: US3144905A
Application number: US69372A
Authority: US
Inventors: Albert William
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-11-15
Filing date: 1960-11-15
Publication date: 1964-08-18
Anticipated expiration: 1981-08-18

Description

Aug. 18, 1964 w, ALBERT 3,144,905

ROLL CONSTRUCTION 3 Sheets-Sheet 1 Filed Nov. 15, 1960 wozgm m\ INVENTOR WILLIAM ALBERT BY Q'N ATTORN Y Aug. 18, 1964 F iled Nov. 15, 1960 w. ALBERT 3,144,905

ROLL CONSTRUCTION 3 Sheets-Sheet 3 em -2|s 2IO INVENTOR 224 WILLIAM ALBERT ATTORNEY United States Patent 3,144,995 BULL CONSTRUCTION William Albert, 395 W. Evans St, Middlesex, NJ. Filed Nov. 15, 1969, Ser. No. 69,372 6 Claims. (Cl. 165-89) This invention relates to a new and improved roll construction and, in particular, to a roll provided with a resiliently mounted and removable roll surface and to such a roll wherein a heat exchange medium may be directed adjacent the undersurface of the resiliently mounted roll surface for heating or cooling same.

It is a particular object to provide a new and improved roll having a resiliently mounted removable roll surface which may be provided with means for directing dual streams of a heat exchange medium in countercurrent direction adjacent the undersurface of the resiliently mount-' ed roll surface.

A further object of the invention is to provide such a roll having particular utility in the production of plastic films, paper, asphalt shingles, asbestos cement shingles, and products where surface contour or finish of a product is dependent on the outside diameters of cylinders or rolls.

A further object is to provide such a roll which is simple in construction, relatively inexpensive to manufacture and is provided with a roll surface which may be readily removed for repair, reconditioning, or interchanged with other roll surfaces.

A further object of the invention is to provide such a roll at considerable reduction in cost and time of construction and is adapted to maintain down time caused by damage to the outside diameter of the roll at a minimum.

These objects are fully accomplished by a roll comprising a shaft having ends adapted for rotatably mounting the shaft, a first rigid sleeve, a circular plate member rigidly connecting each end of the first sleeve to the shaft, a second rigid sleeve having an inside diameter greater than the outside diameter of the first sleeve and adapted to be telescopically received over the first sleeve, expansible tubing received between the outer cylindrical surface of the first sleeve and the inner cylindrical surface of the second sleeve, and means for expanding the expandible tubing whereby the second sleeve rotates with the first sleeve; and to such a roll construction including means for directing a heat exchange medium through and/or about the expansible tubing.

Other objects and advantages of the present invention will be more apparent to those skilled in the art from the following detailed description of the invention when considered in conjunction with the illustrative embodiments thereof wherein:

FIG. 1 is a longitudinal sectional view of one form of the improved roll construction of the present invention;

FIG. 2 is a sectional view substantially on line 22 of FIG. 1;

FIG. 3 is a sectional view substantially on line 3-3 of the roll shown in FIG. 1;

FIG. 4 is a fragmentary longitudinal sectional View of a further form of roll constructed in accordance with the teachings of the present invention and adapted for countercurrent flow of a heat exchange medium about the inner surface of the outer roll sleeve;

FIG. 5 is a section substantially on line 55 of the device shown in FIG. 4; and

FIG. 6 is an enlarged fragmentary sectional view of a further form of means for conducting dual streams of a heat exchange medium to the ends of the roll shaft.

Referring to the drawings and in particular to FIGS. 1, 2 and 3 thereof, ltl generally designates a roll constructed in accordance with the invention. The roll is provided with a central shaft 12 having ends 14 and 16 adapted to be received in conventional bearing means for rotational mounting of the shaft.

The roll 10 includes a first cylindrical sleeve 18 preferably constructed' of a rigid material such as rolled steel. The first sleeve 18 is rigidly mounted to the shaft 12 by a pair of circular spaced

steel plates

20 and 22 adjacent one end of the first sleeve 18 and identical plates 20' and 22' adjacent the opposite end. The

plates

20, 22, 20' and 22' may be welded to the shaft and the inner surface of the sleeve 18.

End 14 of the shaft 12 is provided with an axial bore 24 which bore intersects a plurality of radial bores 26. The opposite end 16 of the shaft 12 is provided with an axial bore 24' and a plurality of radial bores 26 similar to the axial and

radial bores

24 and 26 at end 14 of the shaft 12. The radial bores 26 open into the space be tween the pair of

circular plates

20 and 22 while the radial bores 26 open into the space between the circular plates 20' and 22'.

The first sleeve 18 is provided with a plurality of open-f ings generally designated 28 adjacent end 14 of shaft 12 which openings are positioned between the pair of

plates

26 and 22, while similar openings 28' are provided in the sleeve 18 between plates 20 and 22' at end 16 of the assembly. t

In order to provide for a pressure balance between the inner surface of the first sleeve 18 and the atmosphere, one or both of the ends of the roll may be provided with a pressure equalizing tube 33 which tube, as more clearly illustrated in FIG. 1 of the drawings, passes through and is secured about aligned bores in the pair of

end plates

20 and 22.

The outer cylindrical surface of the sleeve 18 is provided with a pair of generally

circular grooves

30 and 30 and a continuous helical groove 32 connecting the. pair of grooves 30 and 30'. The size of the grooves 3030' and the helical groove 32 are such that a portion of the surface of expansible tubing generally designated 34 may be received therein. The expansible tubing 34 has a pair of generally circular ends 36 and 36' adapted to be received in grooves 30 and 30' respectively and a center section generally designated 38 adapted to be received in the helical groove 32 and to connect the pair of the generally circular ends 36 and 36'.

The expansible tubing may be constructed of wrapped braided metal, rubber, rubber-cored braided metal, plastic, or combinations thereof and the form of the tubing 34 would to some extent depend upon the pressure required in the tube and Whether a heating or cooling heat exchange medium is to be passed therethrough or thereabout.

In the form of the invention illustrated in FIGS. 1 through 3 of the drawings, end 40 of generally circular tube portion 36 has connection to a valved coupling 42 through a short pipe section 44. The opposite end 36 of the tube is similarly connected to a valved coupling 42'. The free end of the valved outlet coupling 42 is provided with a short threaded adapter 46 while a similar threaded adapter 46' is provided at the opposite end of the roll. The threaded

adapters

46 and 46 receive conventional connectors whereby pressure fluid may be conducted into the expansible tubing 34 as to be more fully described hereinafter.

The roll assembly also includes a second cylindrical shell 48. The cylindrical shell 48 has an inside diameter greater than the outside diameter of the first cylindrical shell 18 and the cylindrical shell 48 is adapted to be telescopically received over the first cylindrical shell 18 and the expansible tubing 34. The outer cylindrical surface 50 of the second shell 48 comprises the roll surface. The particular form of the surface 50 is dependent on the ultimate use of the improved roll. For example, where the roll is to provide a smooth calendered surface on paper, plastic and the like, the outer surface would be accurately machined anl preferably provided with an electroplated coat of chromium.

It will also be appreciated that the roll surface 50 may have a design configuration thereon where the roll is to impart a design on the surface of the material being processed.

Adjacent the ends of sleeve 48, the inner surface 52 of the sleeve is provided with a generally circular groove 54 adjacent end 14 of the

shaft

12 and 54 adjacent the other end.

Grooves

54 and 54 correspond to and cooperate with grooves and 30 in the outer surface of the cylindrical sleeve 18, and are adapted to receive a portion of the generally

circular ends

36 and 36 of the expansible tubing 34.

It will also be apparent that where desired a generally helical groove could be provided in the inner surface of the outer sleeve 48 corresponding to the helical groove 32 in the outer surface of the sleeve 18. However, it has been found that very satisfactory results are provided where only the generally circular grooves 54 and 54' are provided on the inner surface of the second sleeve 48.

In operation of the roll shown in FIGS. 1 through 3 of the drawings, the shaft ends 14 and 16 are mounted for rotation in conventional bearing means carried by the processing machine. The second sleeve 48 is mounted to rotate with the first sleeve 18 and the shaft 12 by expanding the expansible tubing 34. In general, a medium sized roll will require about 150 lbs. per square inch pressure in the tubing 34 to adequately mount the sleeve 48 to the sleeve 18. The pressure is directed to the tubing 34 through one of the valve couplings 42 from a convenient source of gas or liquid pressure fluid, such as a standard high pressure nitrogen or carbon dioxide cylinder, and then the appropriate valve 42 or 42' is closed and thepressure cylinder or source of pressure fluid is disconnected from the threaded outlet 46 or 46'.

Where a heat exchange medium is to be circulated about the helical expansible tubing 34 from one end 14 to the opposite end 16 of the roll, the extended ends of the shaft 12 are connected by swivel couplings to a source of cooling medium whereby the cooling medium is directed, for example, through axial bore 24, radial bores 26, openings 28 in sleeve 18 about the helically arranged expansible tubing 34, out openings 28, radially bores 26' and axial bore 24' to a further swivel connection.

The distance between the volutes of the helically arranged expansible tubing may be varied to support greater or lesser weights and can be varied to permit greater or lesser volumes of heat exchange medium to circulate between the inner surface of the outer shell 48 and the outer surface of the inner shell 18.

Where it is necessary to remove the outer shell 48 for replacement, repair, cleaning and the like, the pressure maintained in the expansible tubing 34 is released through one of the valved couplings 42 or 42', thereby collapsing the tube and permitting the ready removal of the outer sleeve 48.

Where it is desired to maintain the temperature of the outer surface of the second sleeve of the roll substantially uniform, it has been found that it is desirable to pass a heat exchange medium in one direction about the helically arranged expansible tubing 34 and in the opposite direction through the tubing 34. In such a construction, the heat exchange medium passing through the expansible tubing is passed through under pressure whereby the heat exchange medium provides the source of pressure for maintaining the outer shell 48 in operating relationship to the shaft 12 in addition to the means for maintaining the surface of the roll at a substantially uniform temperature.

One form of the present invention adapted for countercurrent travel of the heat exchange medium is illustrated in FIGS. 4 and 5. Referring to these drawings, the roll generally designated includes a shaft 112 having extended ends 114 and 116 adapted to be rotatably received in conventional bearings. The shaft 112 supports a first cylindrical sleeve 118 on pairs of

spaced plates

128, 122 and 120' and 122 adjacent ends 114 and 116 of the roll shaft 112.

The roll also includes a second or outer cylindrical shell 148 which is telescopically received in spaced relation over the first shell 118 as described in reference to the form of the invention shown in FIGS. 1 through 3 of the drawings. Expansible tubing 134 provided with the generally circular ends 136 and 136' is connected by conduit means and 160' to generally

radial bores

162 and 164 adjacent ends 114 and 116 of shaft 112. It will be particularly noted that radial bore 164 has a lesser diameter than radial bore 162. Radial bore 162 communicates with a generally longitudinal bore 166 provided in shaft end 114 while generally radial bore 164 communicates with a generally longitudinal bore 166'.

The space between the helically arranged expansible tubing 134 communicates with axial bore 124 and adjacent end 114 and a similar bore 124 adjacent end 116 of shaft 112 through generally radial bores 126 and 126' and openings 128 and 128' respectively. Each end of the shaft mounts a swivel joint generally designated 168 adjacent end 114 and 168 adjacent end 116. The swivel joints 168 and 168' are adapted to provide two fluid conducting passages in unbroken communication during relative rotation of the parts of the swivel joints.

Swivel joints 168 and 168 are identical in form and include a stationary element 170 rotatably mounted to the rotatable element 172. The rotating element 172 is rotatably mounted to the rotating element 170 of the swivel joint 168 by conventional thrust bearing means generally indicated at 187. Rotatable element 172 is provided with a flange portion 174 which is secured to the end of shaft 114 by bolts or the like 176'. The rotatable element 172 has an axial opening which threadedly receives a bushing 176 which mates with the bore 124 in the shaft 114.

The rotatable element 172 also is provided with a bore receiving a bushing 180 which bushing is adapted to be received in the bore 166 in the shaft 114. Bushing 176 communicates with an axial bore 182 provided in the stationary portion 170 of the swivel joint. The bore 182 in the stationary portion of the swivel joint is connected by a conduit 184 to a source of heat exchange medium. In this form of the invention, the conduit 184 is the return conduit for the heating medium flowing about the helical path between the volutes of the expansible tubing 134 as shown by the directional arrows.

The stationary section 170 of the swivel joint 168 is provided with an annular chamber 186 which annular chamber communicates with a pipe or conduit 188 connected to a source of heat exchange fluid under pressure. The annular chamber 186 communicates with the annular space 190 between cylindrical wall 192 of the rotating section 180 of the joint and stationary wall portion 194 of the stationary element of the swivel joint. The annular space 190 communicates with the bushing 180 whereby the heat exchange medium under pressure flows through bore 166, radial bore 162, flexible conduit 160, to and through the expansible tubing 134.

At end 116 of the improved roll the heat exchange medium flowing through the tubing is exhausted from the shaft via the coupling 168 and specifically through pipe 200 which communicates with annular space 202 which in turn communicates with the bushing 204.

As hereinbefore set forth conduit 164 in end 116 of the shaft 112 is of a smaller diameter than the corresponding radial bore 162 in end 114 of shaft 112. The constricted bore 164 cooperating with the source of pressurized heat exchange liquid pressurizes the expansible tubes 134 maintaining the second sleeve 148 in substantially fixed relation to the inner sleeve 118.

It will be particularly noted that with a portion of the heat exchange liquid flowing in the direction of the directional arrows through the expansible tubing and another portion of the heat exchange liquid flowing about the helically arranged flexible tubes 134 and in the opposite direction to the flow of the medium through the tubes that very uniform temperature control of the surface of the outer cylindrical member 148 is obtainable.

In this form of the invention as in the form of the invention shown in FIGS. 1 through 3, a tube 208 extending between and through at least a pair of the

circular plates

120 and 122 maintains the pressure within the roll at substantially ambient pressure.

Referring to FIG. 6 of the drawings, a modified swivel joint adapted to provide two fluid conducting paths or passages in unbroken communication with the rotating shaft of the roll is illustrated. This form of the swivel joint for the improved roll has particular advantage where the roll is not adapted for high-speed operation and antifriction bearing means for the swivel joint are not required.

Referring specifically to FIG. 6, 210 designates a shaft for a roll such as shown in FIG. 4 of the drawings, which shaft is provided with a conduit 212 for directing a cooling medium about the space between the helically arranged flexible conduits of the roll. The shaft 210 is provided with a further conduit 214 which is adapted to direct a heat exchange medium under pressure to and through the expansible tubings.

Each end of the shaft 210 may be conveniently provided with a bearing plate 216, which bearing plate is provided with

bores

218 and 220 adapted to communicate with the

conduits

212 and 214 respectively.

The said extended end of the shaft 210 rotatably receives a fixed block 222 which is provided with a large bore 224 adapted to snugly receive the end of the shaft 210 and the fixed block 222 is maintained in operating relationship to the end of the shaft 210 by a conventional snap-ring arrangement 226. The fixed block 222 has an axial bore 228 which axial bore communicates with the opening 218 in the bearing plate 216 and conventional conduit means generally indicated at 230 is threadedly received in the bore 228.

The fixed block 222 is also provided with a bore 232 which bore threadedly receives a conventional conduit 234 connected to a source of heat exchange liquid under pressure. The inner end 236 of bore 232 communicates with an annular chamber 238 whereby continuous communication is maintained between the bore 232 in the fixed block 222 and the opening 220 in the rotating shaft 210.

As previously described with reference to FIG. 4, the other end of the roll shaft would be provided with a substantially identical fixed block for directing heat exchange medium about the helically arranged expansible tubings and to and from the tubing.

While plural forms of the improved roll constructlon have been specifically illustrated in the drawings and described in the foregoing specification, it will be apparent to those skilled in the art that various modifications may be made in the form and shape of the structures without departing from the scope of the appended claims.

I claim:

1. A roll construction comprising a shaft having ends adapted for rotational mounting of said shaft, a first rigid sleeve, means for rotating said first rigid sleeve upon rotation of said shaft, said means comprising first circular plate means rigidly connecting each end of the first sleeve to said shaft, a second rigid sleeve having an inside diameter greater than the outside diameter of said first sleeve and adapted to be telescopically received over said first sleeve, means for rotating said second sleeve upon rotation of said shaft, said means for rotating said second sleeve consisting solely of expansible tubing received between the outer cylindrical surface of said first sleeve and the inner surface of said second sleeve, and means for expanding said expansible tubing whereby said second sleeve rotates with said first sleeve and each rotates with said shaft, said expansible tubing being positioned in a helical array across the outer surface of said first sleeve and in contact with the inner surface of said second sleeve.

2. The invention defined in claim 1 including means for directing a heat exchange medium about the volutes of the helically arranged tubing.

3. The invention defined in claim 1 including means for directing a heat exchange medium under pressure through said expansible tubing.

4. The invention defined in claim 1 including means for directing a heat exchange medium about the volutes of the helically arranged tubing, and means for directing a heat exchange medium under pressure through said helically arranged expansible tubing.

5. A roll comprising a shaft having ends adapted for rotatably mounting said shaft, a first rigid metallic sleeve, a pair of spaced circular plate members rigidly connecting each end of said first sleeve to said shaft, said first sleeve having a generally circular groove in the outer surface thereof adjacent the ends of the sleeve and a generally helical groove connecting said generally circular grooves, a second rigid metallic sleeve having an inside diameter greater than the outside diameter of said first sleeve and adapted to be telescopically received over said first sleeve, a pair of generally circular grooves on the inner surface of said second sleeve and corresponding to the generally circular grooves in said first sleeve, expansible tubing received between the outer cylindrical surface of said first sleeve and the inner cylindrical surface of said second sleeve in said generally cylindrical end grooves and said helical groove, means for expanding said expansible tubing whereby said second sleeve rotates with said first sleeve, an axial bore in each end of said shaft, radial bores in said shaft communicating with each of said axial bores, said radial bores being positioned between each of said pairs of circular plates securing said first sleeve to said shaft, and openings in said first sleeve to permit the flow of a heat exchange medium through said axial bores, said radial bores, said openings in said first sleeve, and about the expansible tubings received in the generally helically arranged grooves.

6. The invention defined in claim 5 wherein the means for expanding said expansible tubing includes means for directing a heat exchange medium under pressure through said expansible tubing.

References Cited in the file of this patent UNITED STATES PATENTS 1,583,333 Bigum May 4, 1926 2,062,321 Levin Dec. 1, 1936 2,141,645 Fawick Dec. 27, 1938 2,250,325 Barnes July 22, 1941 2,388,003 McCullough Oct. 30, 1945 2,425,599 Cox Aug. 12, 1947 2,725,218 Cuming Nov. 29, 1955 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 144,905 August 18, 1964 William Albert It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

In the heading to the printed specification, line 3, for "William Albert, 305 W. Evans -St. Middlesex, N. J." read William Albert, Middlesex, N. J. (305 W. Evans St. Florence, Sn (L) Signed and sealed this 22nd day of December 1964.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD A], BRENNER Attesting Officer Y Commissioner of Patents