CA2234274A1 - Apparatus for moving a belt, in particular for moving a conveyor belt, in a system for dewatering a web of material - Google Patents
Apparatus for moving a belt, in particular for moving a conveyor belt, in a system for dewatering a web of material Download PDFInfo
- Publication number
- CA2234274A1 CA2234274A1 CA 2234274 CA2234274A CA2234274A1 CA 2234274 A1 CA2234274 A1 CA 2234274A1 CA 2234274 CA2234274 CA 2234274 CA 2234274 A CA2234274 A CA 2234274A CA 2234274 A1 CA2234274 A1 CA 2234274A1
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- CA
- Canada
- Prior art keywords
- belt
- bearings
- adjusting
- electric motor
- deflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/005—Wire-tensioning devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/36—Guiding mechanisms
- D21F1/365—Guiding mechanisms for controlling the lateral position of the screen
Landscapes
- Structure Of Belt Conveyors (AREA)
- Drives For Endless Conveyors (AREA)
- Paper (AREA)
- Filtration Of Liquid (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Advancing Webs (AREA)
Abstract
An apparatus for moving a belt, in particular for moving a conveyor belt in a system for dewatering a web of material, such as a screen belt or a felt belt. The apparatus has a plurality of support rollers and deflection rollers, by way of which the endless belt is deflected to form a closed loop. A
device is provided for adjusting at least one of the deflection rollers in the longitudinal direction of the belt, whereby the tension of the belt can be set, and a device for controlling the direction of motion of the belt. Each bearing of the deflection roller which is adjustable in the longitudinal direction of the belt is assigned its own control device, by which the two bearings of the deflection roller are adjustable to different extents or in different directions, as a result of which the direction of motion of the belt is also controllable by means of the deflection roller. (Fig.I)
device is provided for adjusting at least one of the deflection rollers in the longitudinal direction of the belt, whereby the tension of the belt can be set, and a device for controlling the direction of motion of the belt. Each bearing of the deflection roller which is adjustable in the longitudinal direction of the belt is assigned its own control device, by which the two bearings of the deflection roller are adjustable to different extents or in different directions, as a result of which the direction of motion of the belt is also controllable by means of the deflection roller. (Fig.I)
Description
APPARATU5 FOR MOVING ~ BE~T, IN PARTICULAR FOR MO~I~G A
CONVEYOR BELT, IN A SYSTEM FOR DEWATERI~G A WEB OF MATERIAL
~ Background of the Invention:
Field of the In~ention:
The in~ention pertains to an apparatus ~or moving a belt, in particul~r an apparatus for moving a con~eyor bel~ in ~ system for dewaterin~ a web of ma~erial, such ~s a belt or a felt belt; the ~ppara~us has a plurality of support rollers and deflection rollers, ~y way of which the endless belt can be moved to revolve, a device for adjusting at least one of the deflection rollers in the travel direction of the belt, 15 whereby the tension of the belt can ~e set, and a device for controlling the dlrection of motion of the belt.
In rç3lated prlor art ~pparat~lses, at least one of the deflection rollers is supported so that lt can be a~justed an~
flxed in the longitudinal direction of the belt. By adjusting ~h~ deflection rolle~, the belt can be tensed in ~ccordance with the specific technical requirements.
In tho~e prior art ~ppar~tu~e~, at least ~n~ o~ th~ support 25 rollers for the belt, disposed between the deflection rollers, is also adjust~ble in its position relatit~e to the direction o~ motion o~ tlle belt. Thls i:3 dor~e by ~etting (~nd flxing in - - . CA 02234274 1998-04-08 the ~3et pos ~ tion) one of the t~o bearings of the support roller in the diret;:tion of motion of the belt. As a result, the orientation of the rotary shaft of that support roller relative to the dir~ction of motion of the belt is varlable.
5 Due to the ~act that the belt line of contact between the belt and the support roller is parallel to the shaft o~ the support roller, and the ~elt is oriented perpendicul~r to the shaft of the suppor~ roller, the direction of motion of the 3~elt can be regulated by this p~ovision. As a result, guidahce of the 10 belt is a~sured ov~r all the ~upport ~ollers and deflection rollers in a way tha~ meets th~ specific t~chnical requireme~ts.
Summary of the Inven~ion:
lS It is a~cordin~ly an ob~ect of the invention to provide an apparatus for moving a belt, in particular a con~eyor belt in a sys~em for ~ryi~g a material web, which improved relative to ~he pri or art ~evices ~nd methods of this general type and which i~ structu~ally ~ nplified without thereby impairing its ~0 operability .
The basic premise o~ the invention is the recognition that the direction of motion of the belt is controllable not only ~y means o~ the angular po;~ition of the suppor~ rollers but also 25 by the an~ular position of the de~lection rollers.
. . CA 02234274 1998-04-08 .,~., With the ~oregoing and other objects in view there i~
provided, in accordance with the invention, an apparatus fo~
moving an endless ~elt, compr~si~g:
a plurality of rotatably s~pported support rollers and deflec~on rollers;
an endless belt, such as a screen belt or ~elt belt, traveling o~ the support rollers and about the deflection rollexs along a longitudinal direction;
t~o ~earings rota~ably supporting the one deflection ro~ler 0 and being movably suppor~ed in the longitudinal direction of the belt; and a control device connected to the bearings for ~ndependently shifting the bearings in the longit~di~al d~rection of the belt and ~or adju~ting the one deflection rc~ller and sett~ ng a 5 tension of the belt and co~trollin~ a direction of motion of the belt.
In othèr words, t~e objects of the invention ~re satisfied in that each bearing o~ the deflection roller is ~djustable in 2Q the longitudinal direction of the ~elt, and each is assigned its o~n control device, by which 'che ~wo bearings of the deflection roller are adjustable to different extents or in different directions. The direction of motion of the belt is thus controllable by means of ~he deflection roller.
. CA 02234274 1998-04-08 In accordance with an added feature ~f the inventlon, the control device comprises two separate control de~ices each operatively associated with a respecti~e one o~ the bearings, and the separate control deyicas adj usting the beari~gs to ~ ~ m~tually different extents and in ~utually different directions.
In accordance with an additional feature of the inven~ion, two adjusting spindle~ are respectively connected to the two bearings of ~he deflection roller, ~hereby a rotati~n of t~e spindle ca~ses a shift of the respective be~ring ~ n the longitudinal direction.
I~ accordance with another feature of the invention, a ~e~el 15. gear connects each o~ the adjusting spindles to a power ou~put shaft for rotating the spindles~
In accordance with again an added feature of the invention,ian electric m~tor is ~onnected to each of the adjusting spindles ~0 for rotating the adjusting spindles, ~nd a control circuit is co~nec~ed to and selecti~ely drives the electric motors at mutually differen~ speeds and in m~tually different directions.
Xn accordance with again an additional feature of the invention, an electric motor and a drive shaft connect to the tw~ ~dj~sting spindles vi~ a respective power takeoff, and ~
:~ . CA 02234274 1998-04-08 control gear (e.g. superposition gear) i~ dlspose~ between th~
power ta~eo~fs of the adjusti~g spindles.
In accordance with agai~ another feat~re of the invention, - s there are provi~ed hydra~lic control devices connected to the two bearings for selectively and independently adjRsting the bearings.
In accordance with again a further feature of the invention, the control dev~ce comprises two toothed belt drives each connected to a respective bearing, and an electric motor driving the toothed belt drives~
In accordance wit~ yet another feature of the inv~ntion, two independent electric motors are provided each driving a respective one of the toothed belt drives.
In accordance ~ith a con~omitant featu~e o~ the invention, the elec~ric motor is a single electric motor drivin~ the two belt drives, and including a drive shaf~ connected to the toothed ~elt ~rives ~t respective power takeo~s, and a control gear (superposition gear) i~ disposed between the po~er ta~eoffs of the two toothed belt drives.
25 Other f eatures whi~h are considered as chara~eristic for the inven~ion are ~et forth in the appended ~laims.
~ CA 02234274 1998-04-08 .
Although the in~entlon is illustrated and described hereln as embodied in an apparatus for ~oving a belt, in particu~ar for moving a co~veyor ~elt, in a system for dewateri~g a web of material, it is nevertheles~ ~ot intended to be limited to the details shown, since various modifications and structural ~ changes may be made therein witho~t departing from ~he spirit of ~he invention and within the scope and range of equivzlents o~ the claims.
The ~on~truction 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 dra~ings.
~rief Description of the ~rawings:
Fig. 1 is a partly bro'~erl away, partial pl2n view of ~ left-hand Qnd of ~ first embodiment of the invention;
Fig. la is a partly ~roken away, partial side elevational view thereo~;
Fig. 2 is a p~rtly broken away, partial plan vlew of a left-hand end of ~ sccond embodin~ent of tho invention;
Fig. 2a is ~ partly ~roken a~ay, par~ial side e' evational view thereo~, :: - CA 02234274 l998-04-08 Fig. 3 is a diagrammatic and partial plan ~iew o~ a left-hand end of a third embodiment of the invention;
Fi~. 3a is a partly broken ~way, partial side elevational view ~ thereof;
Fig. 4 is partial plan vie~ of a left-hand en~ of ~ rourth embodiment of the invention; and Fig. 4a is a partly broken away, partial side elevational view thereof Description of the Preferred Embodimen~:
1~ Referring now to the figures of the ~rawing in detail and first, particularly, to Figs. l and la thereof, there is seen a portion of an apparatus in a ~ystem for dewatering a web of material, such as a web of paper, with a deflectio~ rollex l on its left~hand end, over whioh a screen belt 2 is ~ulded that wraps around the deflection roller 1 o~er approximately 180~. The belt 2 is ~uided over a plurality o~ support rollers 10 as its upper run moves a~ong the direction of ~otion A.
second de~l~ction roller is located on the right-hand end o~
the screen belt apparatus aro~nc~ which th~ soreen belt 2 also wraps o~er an angle of about 180~. Sin~e such a screen belt apparatus is known from the prior art, for ins~ance in a system for paper production, ~he suppor~ rollers lo are only schemat~cally indicated in phantom and ~ne rlght-hand deflection roller is not ~hown in the drawing~
One guide device 3 and 4 each for respecti~e be~ring blocks 31 S and 41 is located on the t~o sides o~ the screen belt 2. The two ends 13 and 1~ of ~he rotary shaft 11 of the deflection roller 1 are supported in the bearing bloc~s 31 and 41, respectively. The bearing bloc~s 31 and 41 a~e formed with bores 32 and 42, through which g~ide rods 33 and 43 pass. The guide rods 33 and 43 are aligned in the longitudihal direction of ~he screen belt apparatus. The two bearing blocks 31 and 41 are also zssigned two contro~ devices 5 and ~, by means of which t~e bearing blocks ~1 and 41 are adjustable in di~ferent directions and to differer~t extents in the direc~ion of motion 15 of the scrçen belt ~.
In Flg. la, a ~irst position of the bearing block 31 is shown ln solid lines, ancl two other positions of the bearing block 31 are shown in dashed lines.
~0 The s~reen belt 2 is tensed to suit the technical requiremen~s by displacing the two bearing blocks 31 and 41 in the direction of motion A o~ the upper rlln of the sc~een ~elt 2 or counter to the direction of motion A. In ~his case ~tensin~
of the belt), t~e two blocks 31 and ~1 are moved to t~e sa~e extent, If, on the other hand, the two bea~ing blocks 31 and 41 are shifted in ~ifferent directions and to different --. . CA 02234274 1998-04-08 extents, a c~ange in the angular orientation of the de~lection roller 1 i3 brought about, whereby a control of the direction of motion o~ the screen belt 2 i~ also effe~ted ~y the deflection rollex 1.
- In the exemplary embodiment of Fig. 1 and la, the control devices 5 and ~ assigned to the two bearing blocks 31 and 41 comprise an electric motor Sl and a ~ear 52. An adjusting spindle ~5 is slaved to the power ta~eoff sh~ft 53 of the gea~
a 52 via a bevel gear 54. The adjusting spindle 55 p~sses through a nut thread 34 located in the bearing block 31. The power ta~eoff shaft 53 is al~o guided on a superposition gear 62, which is controlled by a seco~d electric motor ~1. The power takeoff shaft 63 of the supe~position gear 62 i~ ~oupled lS via a second bevel gear 64 to a second adjusting spindle 6St which passes through a nut thread 44 dispose~ in the bearing block 41. By rotation o~ the adjusting spindle 65, the bearing block 41 is di~placea~le i~ the dire~tion parallel ~o the ~creen belt 2.
The mode of operation of ~hi~ appa~atus is as follow~:
~hen ~he power takeoff shaft 63 of the gea~ 52 is rotated by means of the ele~tric motor 51, ~hen via the adjus~ing spindle 2~ S5 the bearing block 31 is displaced along the guide rod 33.
The shaft 63 is also driven ~ia the ~uperpositio~ ge~r 62 by the power takeoff shaft 53 of the gear 52, and wit~ that ~ aft . . . CA 02234274 1998-04-08 the adjusting gpindle 65 assigned to the be~ring block 41 is rot~ted via the bevel gear 64. As a re~ult, the ~earing block 41 is ~lso displaced along the guide rod 43.
If there is no change in the rotational spee~s of the power ~akeoff shafts S3 and 63 because of the superposition gear 62, then the adjusting spindles 55 and 65 are rotated a~ the ~ame speed, and as a result the t~o bearing blocks 31 and 41 ~re displaced to the same extent~ The result is therefore solely 0 a tensing of the screen belt 2. Conversely, if the superposi~lon gear 62 is controlled by means of the second electric ~otor 61 in such a way that the power takeoff sha~
63 is rotated at a dif~erent ~peed from the power takeoff ~haf~ 53, then the ~djusting spin~les S5 and ~5 are rotated at different speeds and as a result the two bearing block~ 31 and 41 are displaced to dif~erent extents. This changes the angular orientation of the deflection roller 1, and as ~
resuLt the direction of motion of the belt 2 is controlled.
20 By ~uitable control of the two electric motors 51 and 61, it ls thus po~3ible to effec~ either a tensing of the screen belt 2 or a change in the angular orientation of th~ deflection roller 1 in order to control the direction of motion of the screen belt, or to attain ~oth a tensing of the screen bel~ 2 and a change in the angula~ position of the deflection roller 1 in or~er to regulate the dlrection o~ motion of the screen belt 2.
CA oi234274 1998-04-08 The exemplary embodiment of ~igs. 2 and ~a differs from the exe~pl~ry embodiment ~f Figs. 1 and la only in th~t gear wheels 55 and 66 are located on the power t~keoff shafts 53 S and ~3, and toot~ed belts 57 and 67 coupled to the bearing ~ blocks 31 and 41 are placed on the ge~r wheels. On their end, the toothed belts 57 and 67 are placed ovex deflectio~ wheels 35 and 45.
1~ It is immediately eviden~ from the figures that a rotation of the gear wheels 55 ~nd 66 causes the toothed bel~s 57 and 67 to move and, as a resu~t, the bearing blocks 31 and 41 are displaced along the gui~e rods 33 and 43.
The exemplary embodiment of Figs. 3 and 3a differs f~om the exe~plary em~odiment of Figs. 1 and la in that a hydraulic control device 1 is provided to adjust the two ~eari~g block~
31 and 41. The control device 7 includes two adjusting cylinders 71 and 73, assigned to ~he two bearing blocks 31 and 41, respecti~ely. The cylinders are acted upon with a pressure medium from a pump 75 vi~ control sli~es 76, 77, 78, 79. Various adjustmen~s of ~he slidln~ valves result in the pistons 72 and 74, ~nd thus the bearing blocks 31 ~nd 41, ~o be adjus~ed. A central control unit 70 controls the pump 7 and the control slides 76-79.
- . CA 02234274 1998-04-08 The bearing blocks 31 and ~1 can thereby be dlsplaced to the sa~e extent or to different extents and i~ ~ifferent directions. The screen belt 2 is thus selectively tensed and/or its direction of motion is adjusted.
s ~ The exemplary embodiment of Figs. 4 and 4a differ~ from the exemplary embodiment of Figs. 1 and la in that each of the adjusting spindles 55 and 65 is assigned a respective ele~tric motor 81 and 82. The two electric motors 81 and 82 are controlled by a co~trol unit 80 in such a way that the direction and speed of rot~tion of the adjusting spindles 55 and 6~ are arbitrary. The bearing blocks 31 ~nd 41 may thus be displaced in the same or opposite directions, and to the same or a different extent. In other ~ords, the screen belt 2 may be tensed and/or the direction of mQtion of the belt 2 may be varied electronicallyJelec~rically.
lt is essential in ~1 the exemplary embodiments that the two bearing ~locks of at least o~e def~ection roller of the syste~
are displaceable independently of one another ~oth to di~fexent extents and ~ n different directions By adjusting the deflection roller the screen belt may be both tensed and controlled in its direction of motion. Since no devices are thus nee~ed for ad~usting suppor~ rollers, a definitive simplification o~ the screen belt apparatus is achieved - ~ . - CA 0 2 2 3 4 2 7 4 19 9 8 - 0 4 - 0 8 :
While the embodi~ents described abo~e re~er to the best ~ode embodi~ent with a screen belt, the invention is equ~lly applicable to felt belts.
The a~ove-described de~ice for regulating a belt can also be - contemplated in other apparatuses, in which an endless belt is guided via deflection rollers and support rollers.
CONVEYOR BELT, IN A SYSTEM FOR DEWATERI~G A WEB OF MATERIAL
~ Background of the Invention:
Field of the In~ention:
The in~ention pertains to an apparatus ~or moving a belt, in particul~r an apparatus for moving a con~eyor bel~ in ~ system for dewaterin~ a web of ma~erial, such ~s a belt or a felt belt; the ~ppara~us has a plurality of support rollers and deflection rollers, ~y way of which the endless belt can be moved to revolve, a device for adjusting at least one of the deflection rollers in the travel direction of the belt, 15 whereby the tension of the belt can ~e set, and a device for controlling the dlrection of motion of the belt.
In rç3lated prlor art ~pparat~lses, at least one of the deflection rollers is supported so that lt can be a~justed an~
flxed in the longitudinal direction of the belt. By adjusting ~h~ deflection rolle~, the belt can be tensed in ~ccordance with the specific technical requirements.
In tho~e prior art ~ppar~tu~e~, at least ~n~ o~ th~ support 25 rollers for the belt, disposed between the deflection rollers, is also adjust~ble in its position relatit~e to the direction o~ motion o~ tlle belt. Thls i:3 dor~e by ~etting (~nd flxing in - - . CA 02234274 1998-04-08 the ~3et pos ~ tion) one of the t~o bearings of the support roller in the diret;:tion of motion of the belt. As a result, the orientation of the rotary shaft of that support roller relative to the dir~ction of motion of the belt is varlable.
5 Due to the ~act that the belt line of contact between the belt and the support roller is parallel to the shaft o~ the support roller, and the ~elt is oriented perpendicul~r to the shaft of the suppor~ roller, the direction of motion of the 3~elt can be regulated by this p~ovision. As a result, guidahce of the 10 belt is a~sured ov~r all the ~upport ~ollers and deflection rollers in a way tha~ meets th~ specific t~chnical requireme~ts.
Summary of the Inven~ion:
lS It is a~cordin~ly an ob~ect of the invention to provide an apparatus for moving a belt, in particular a con~eyor belt in a sys~em for ~ryi~g a material web, which improved relative to ~he pri or art ~evices ~nd methods of this general type and which i~ structu~ally ~ nplified without thereby impairing its ~0 operability .
The basic premise o~ the invention is the recognition that the direction of motion of the belt is controllable not only ~y means o~ the angular po;~ition of the suppor~ rollers but also 25 by the an~ular position of the de~lection rollers.
. . CA 02234274 1998-04-08 .,~., With the ~oregoing and other objects in view there i~
provided, in accordance with the invention, an apparatus fo~
moving an endless ~elt, compr~si~g:
a plurality of rotatably s~pported support rollers and deflec~on rollers;
an endless belt, such as a screen belt or ~elt belt, traveling o~ the support rollers and about the deflection rollexs along a longitudinal direction;
t~o ~earings rota~ably supporting the one deflection ro~ler 0 and being movably suppor~ed in the longitudinal direction of the belt; and a control device connected to the bearings for ~ndependently shifting the bearings in the longit~di~al d~rection of the belt and ~or adju~ting the one deflection rc~ller and sett~ ng a 5 tension of the belt and co~trollin~ a direction of motion of the belt.
In othèr words, t~e objects of the invention ~re satisfied in that each bearing o~ the deflection roller is ~djustable in 2Q the longitudinal direction of the ~elt, and each is assigned its o~n control device, by which 'che ~wo bearings of the deflection roller are adjustable to different extents or in different directions. The direction of motion of the belt is thus controllable by means of ~he deflection roller.
. CA 02234274 1998-04-08 In accordance with an added feature ~f the inventlon, the control device comprises two separate control de~ices each operatively associated with a respecti~e one o~ the bearings, and the separate control deyicas adj usting the beari~gs to ~ ~ m~tually different extents and in ~utually different directions.
In accordance with an additional feature of the inven~ion, two adjusting spindle~ are respectively connected to the two bearings of ~he deflection roller, ~hereby a rotati~n of t~e spindle ca~ses a shift of the respective be~ring ~ n the longitudinal direction.
I~ accordance with another feature of the invention, a ~e~el 15. gear connects each o~ the adjusting spindles to a power ou~put shaft for rotating the spindles~
In accordance with again an added feature of the invention,ian electric m~tor is ~onnected to each of the adjusting spindles ~0 for rotating the adjusting spindles, ~nd a control circuit is co~nec~ed to and selecti~ely drives the electric motors at mutually differen~ speeds and in m~tually different directions.
Xn accordance with again an additional feature of the invention, an electric motor and a drive shaft connect to the tw~ ~dj~sting spindles vi~ a respective power takeoff, and ~
:~ . CA 02234274 1998-04-08 control gear (e.g. superposition gear) i~ dlspose~ between th~
power ta~eo~fs of the adjusti~g spindles.
In accordance with agai~ another feat~re of the invention, - s there are provi~ed hydra~lic control devices connected to the two bearings for selectively and independently adjRsting the bearings.
In accordance with again a further feature of the invention, the control dev~ce comprises two toothed belt drives each connected to a respective bearing, and an electric motor driving the toothed belt drives~
In accordance wit~ yet another feature of the inv~ntion, two independent electric motors are provided each driving a respective one of the toothed belt drives.
In accordance ~ith a con~omitant featu~e o~ the invention, the elec~ric motor is a single electric motor drivin~ the two belt drives, and including a drive shaf~ connected to the toothed ~elt ~rives ~t respective power takeo~s, and a control gear (superposition gear) i~ disposed between the po~er ta~eoffs of the two toothed belt drives.
25 Other f eatures whi~h are considered as chara~eristic for the inven~ion are ~et forth in the appended ~laims.
~ CA 02234274 1998-04-08 .
Although the in~entlon is illustrated and described hereln as embodied in an apparatus for ~oving a belt, in particu~ar for moving a co~veyor ~elt, in a system for dewateri~g a web of material, it is nevertheles~ ~ot intended to be limited to the details shown, since various modifications and structural ~ changes may be made therein witho~t departing from ~he spirit of ~he invention and within the scope and range of equivzlents o~ the claims.
The ~on~truction 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 dra~ings.
~rief Description of the ~rawings:
Fig. 1 is a partly bro'~erl away, partial pl2n view of ~ left-hand Qnd of ~ first embodiment of the invention;
Fig. la is a partly ~roken away, partial side elevational view thereo~;
Fig. 2 is a p~rtly broken away, partial plan vlew of a left-hand end of ~ sccond embodin~ent of tho invention;
Fig. 2a is ~ partly ~roken a~ay, par~ial side e' evational view thereo~, :: - CA 02234274 l998-04-08 Fig. 3 is a diagrammatic and partial plan ~iew o~ a left-hand end of a third embodiment of the invention;
Fi~. 3a is a partly broken ~way, partial side elevational view ~ thereof;
Fig. 4 is partial plan vie~ of a left-hand en~ of ~ rourth embodiment of the invention; and Fig. 4a is a partly broken away, partial side elevational view thereof Description of the Preferred Embodimen~:
1~ Referring now to the figures of the ~rawing in detail and first, particularly, to Figs. l and la thereof, there is seen a portion of an apparatus in a ~ystem for dewatering a web of material, such as a web of paper, with a deflectio~ rollex l on its left~hand end, over whioh a screen belt 2 is ~ulded that wraps around the deflection roller 1 o~er approximately 180~. The belt 2 is ~uided over a plurality o~ support rollers 10 as its upper run moves a~ong the direction of ~otion A.
second de~l~ction roller is located on the right-hand end o~
the screen belt apparatus aro~nc~ which th~ soreen belt 2 also wraps o~er an angle of about 180~. Sin~e such a screen belt apparatus is known from the prior art, for ins~ance in a system for paper production, ~he suppor~ rollers lo are only schemat~cally indicated in phantom and ~ne rlght-hand deflection roller is not ~hown in the drawing~
One guide device 3 and 4 each for respecti~e be~ring blocks 31 S and 41 is located on the t~o sides o~ the screen belt 2. The two ends 13 and 1~ of ~he rotary shaft 11 of the deflection roller 1 are supported in the bearing bloc~s 31 and 41, respectively. The bearing bloc~s 31 and 41 a~e formed with bores 32 and 42, through which g~ide rods 33 and 43 pass. The guide rods 33 and 43 are aligned in the longitudihal direction of ~he screen belt apparatus. The two bearing blocks 31 and 41 are also zssigned two contro~ devices 5 and ~, by means of which t~e bearing blocks ~1 and 41 are adjustable in di~ferent directions and to differer~t extents in the direc~ion of motion 15 of the scrçen belt ~.
In Flg. la, a ~irst position of the bearing block 31 is shown ln solid lines, ancl two other positions of the bearing block 31 are shown in dashed lines.
~0 The s~reen belt 2 is tensed to suit the technical requiremen~s by displacing the two bearing blocks 31 and 41 in the direction of motion A o~ the upper rlln of the sc~een ~elt 2 or counter to the direction of motion A. In ~his case ~tensin~
of the belt), t~e two blocks 31 and ~1 are moved to t~e sa~e extent, If, on the other hand, the two bea~ing blocks 31 and 41 are shifted in ~ifferent directions and to different --. . CA 02234274 1998-04-08 extents, a c~ange in the angular orientation of the de~lection roller 1 i3 brought about, whereby a control of the direction of motion o~ the screen belt 2 i~ also effe~ted ~y the deflection rollex 1.
- In the exemplary embodiment of Fig. 1 and la, the control devices 5 and ~ assigned to the two bearing blocks 31 and 41 comprise an electric motor Sl and a ~ear 52. An adjusting spindle ~5 is slaved to the power ta~eoff sh~ft 53 of the gea~
a 52 via a bevel gear 54. The adjusting spindle 55 p~sses through a nut thread 34 located in the bearing block 31. The power ta~eoff shaft 53 is al~o guided on a superposition gear 62, which is controlled by a seco~d electric motor ~1. The power takeoff shaft 63 of the supe~position gear 62 i~ ~oupled lS via a second bevel gear 64 to a second adjusting spindle 6St which passes through a nut thread 44 dispose~ in the bearing block 41. By rotation o~ the adjusting spindle 65, the bearing block 41 is di~placea~le i~ the dire~tion parallel ~o the ~creen belt 2.
The mode of operation of ~hi~ appa~atus is as follow~:
~hen ~he power takeoff shaft 63 of the gea~ 52 is rotated by means of the ele~tric motor 51, ~hen via the adjus~ing spindle 2~ S5 the bearing block 31 is displaced along the guide rod 33.
The shaft 63 is also driven ~ia the ~uperpositio~ ge~r 62 by the power takeoff shaft 53 of the gear 52, and wit~ that ~ aft . . . CA 02234274 1998-04-08 the adjusting gpindle 65 assigned to the be~ring block 41 is rot~ted via the bevel gear 64. As a re~ult, the ~earing block 41 is ~lso displaced along the guide rod 43.
If there is no change in the rotational spee~s of the power ~akeoff shafts S3 and 63 because of the superposition gear 62, then the adjusting spindles 55 and 65 are rotated a~ the ~ame speed, and as a result the t~o bearing blocks 31 and 41 ~re displaced to the same extent~ The result is therefore solely 0 a tensing of the screen belt 2. Conversely, if the superposi~lon gear 62 is controlled by means of the second electric ~otor 61 in such a way that the power takeoff sha~
63 is rotated at a dif~erent ~peed from the power takeoff ~haf~ 53, then the ~djusting spin~les S5 and ~5 are rotated at different speeds and as a result the two bearing block~ 31 and 41 are displaced to dif~erent extents. This changes the angular orientation of the deflection roller 1, and as ~
resuLt the direction of motion of the belt 2 is controlled.
20 By ~uitable control of the two electric motors 51 and 61, it ls thus po~3ible to effec~ either a tensing of the screen belt 2 or a change in the angular orientation of th~ deflection roller 1 in order to control the direction of motion of the screen belt, or to attain ~oth a tensing of the screen bel~ 2 and a change in the angula~ position of the deflection roller 1 in or~er to regulate the dlrection o~ motion of the screen belt 2.
CA oi234274 1998-04-08 The exemplary embodiment of ~igs. 2 and ~a differs from the exe~pl~ry embodiment ~f Figs. 1 and la only in th~t gear wheels 55 and 66 are located on the power t~keoff shafts 53 S and ~3, and toot~ed belts 57 and 67 coupled to the bearing ~ blocks 31 and 41 are placed on the ge~r wheels. On their end, the toothed belts 57 and 67 are placed ovex deflectio~ wheels 35 and 45.
1~ It is immediately eviden~ from the figures that a rotation of the gear wheels 55 ~nd 66 causes the toothed bel~s 57 and 67 to move and, as a resu~t, the bearing blocks 31 and 41 are displaced along the gui~e rods 33 and 43.
The exemplary embodiment of Figs. 3 and 3a differs f~om the exe~plary em~odiment of Figs. 1 and la in that a hydraulic control device 1 is provided to adjust the two ~eari~g block~
31 and 41. The control device 7 includes two adjusting cylinders 71 and 73, assigned to ~he two bearing blocks 31 and 41, respecti~ely. The cylinders are acted upon with a pressure medium from a pump 75 vi~ control sli~es 76, 77, 78, 79. Various adjustmen~s of ~he slidln~ valves result in the pistons 72 and 74, ~nd thus the bearing blocks 31 ~nd 41, ~o be adjus~ed. A central control unit 70 controls the pump 7 and the control slides 76-79.
- . CA 02234274 1998-04-08 The bearing blocks 31 and ~1 can thereby be dlsplaced to the sa~e extent or to different extents and i~ ~ifferent directions. The screen belt 2 is thus selectively tensed and/or its direction of motion is adjusted.
s ~ The exemplary embodiment of Figs. 4 and 4a differ~ from the exemplary embodiment of Figs. 1 and la in that each of the adjusting spindles 55 and 65 is assigned a respective ele~tric motor 81 and 82. The two electric motors 81 and 82 are controlled by a co~trol unit 80 in such a way that the direction and speed of rot~tion of the adjusting spindles 55 and 6~ are arbitrary. The bearing blocks 31 ~nd 41 may thus be displaced in the same or opposite directions, and to the same or a different extent. In other ~ords, the screen belt 2 may be tensed and/or the direction of mQtion of the belt 2 may be varied electronicallyJelec~rically.
lt is essential in ~1 the exemplary embodiments that the two bearing ~locks of at least o~e def~ection roller of the syste~
are displaceable independently of one another ~oth to di~fexent extents and ~ n different directions By adjusting the deflection roller the screen belt may be both tensed and controlled in its direction of motion. Since no devices are thus nee~ed for ad~usting suppor~ rollers, a definitive simplification o~ the screen belt apparatus is achieved - ~ . - CA 0 2 2 3 4 2 7 4 19 9 8 - 0 4 - 0 8 :
While the embodi~ents described abo~e re~er to the best ~ode embodi~ent with a screen belt, the invention is equ~lly applicable to felt belts.
The a~ove-described de~ice for regulating a belt can also be - contemplated in other apparatuses, in which an endless belt is guided via deflection rollers and support rollers.
Claims (14)
1. An apparatus for moving an endless belt, comprising:
a plurality of rotatably supported support rollers and deflection rollers;
an endless belt traveling on said support rollers and about said deflection rollers along a longitudinal direction:
two bearings rotatably supporting said one deflection roller and being movably supported in the longitudinal direction of said belt; and control device connected to said bearings for independently shifting said bearings in the longitudinal direction of said belt and for adjusting said one deflection roller and setting a tension of said belt and controlling a direction of motion of said belt.
a plurality of rotatably supported support rollers and deflection rollers;
an endless belt traveling on said support rollers and about said deflection rollers along a longitudinal direction:
two bearings rotatably supporting said one deflection roller and being movably supported in the longitudinal direction of said belt; and control device connected to said bearings for independently shifting said bearings in the longitudinal direction of said belt and for adjusting said one deflection roller and setting a tension of said belt and controlling a direction of motion of said belt.
2. The apparatus according to claim 1, wherein said control device comprises two separate control devices each operatively associated with a respective one of said bearings, and said separate control devices adjusting said bearings to mutually different extents and in mutually different directions.
3. The apparatus according to claim 1, wherein said endless belt is a screen belt in a system for dewatering a web of material.
4. The apparatus according to claim 1, wherein said endless belt is a felt belt in a system for dewatering 2 web of material.
5. The apparatus according to claim 1, which further comprises two adjusting spindles respectively connected to said two bearings of said deflection roller, whereby a rotation of said spindle causes a shift of the respective said bearing along the longitudinal direction.
6. The apparatus according to claim 5, which further comprises a bevel gear connected to each of said adjust
7. The apparatus according to claim 5, which further comprises an electric motor connected to each of said adjusting spindles for rotating said adjusting spindles, and a control circuit connected to and selectively driving said electric motors at mutually different speeds and in mutually different directions.
8 The apparatus according to claim 5, which further comprises an electric motor and a drive shaft connected to said two adjusting spindles via a respective power takeoff, and a control gear disposed between the power takeoffs of said adjusting spindles.
9. The apparatus according to claim 8, wherein said control gear is a superposition gear.
10. The apparatus according to claim 1, which further comprises hydraulic control devices connected to said two bearings for selectively and independently adjusting said bearings.
11. The apparatus according to claim 1, wherein said control device comprises two toothed belt drives each connected to a respective said bearing, and an electric motor driving said toothed belt drives.
12. The apparatus according to claim 11, wherein said electric motor is one of two independent electric motors each driving a respective one of said toothed belt drives.
13. The apparatus according to claim 11, wherein said electric motor is a single electric motor driving said two belt drives, and including a drive shaft connected to said toothed belt drives at respective power takeoffs, and a control gear disposed between the power takeoffs of said two toothed belt drives.
14. The apparatus according to claim 13, wherein said control gear is a superposition gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT60997 | 1997-04-09 | ||
| ATA609/97 | 1997-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2234274A1 true CA2234274A1 (en) | 1998-10-09 |
Family
ID=3495124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2234274 Abandoned CA2234274A1 (en) | 1997-04-09 | 1998-04-08 | Apparatus for moving a belt, in particular for moving a conveyor belt, in a system for dewatering a web of material |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0870870A3 (en) |
| JP (1) | JPH10297731A (en) |
| BR (1) | BR9800975A (en) |
| CA (1) | CA2234274A1 (en) |
| NO (1) | NO981649L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009127888A2 (en) | 2008-04-14 | 2009-10-22 | Kodak Graphic Communications Canada Company | Roller alignment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100385631B1 (en) * | 2000-10-16 | 2003-05-27 | 주식회사 조선일보사 | Automatic device for preparing paper rolls |
| CN100371529C (en) | 2002-01-29 | 2008-02-27 | 梅特索纸业有限公司 | Processing device and method of operating the device for processing a coated or uncoated fibrous web |
| DE102006024032A1 (en) * | 2006-05-23 | 2007-11-29 | Voith Patent Gmbh | Arrangement for band regulation |
| KR100673292B1 (en) * | 2006-09-12 | 2007-01-24 | (주) 해송엔지니어링 | Appratus for alignment of belt conveyorswerving |
| EP2377787B1 (en) * | 2010-04-16 | 2013-03-20 | Joseph Vögele AG | Conveyer belt device |
| CN106005948A (en) * | 2016-06-27 | 2016-10-12 | 芜湖市海联机械设备有限公司 | Bucket elevator upper portion structure with deviation preventing function |
| CN107503216A (en) * | 2017-09-30 | 2017-12-22 | 枣庄市恒宇纸业有限公司 | A kind of papermaking equipment wet end automatic takeup |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4173904A (en) * | 1975-09-03 | 1979-11-13 | S.P.A. Luigi Rizzi & C. | Apparatus for automatically centering an endless band trained over two rolls |
| DE2540923B2 (en) * | 1975-09-13 | 1978-01-12 | EMA-Dörries GmbH, Elektronik-Maschinen-Apparatebau, 5190 Stolberg | DEVICE FOR REGULATING THE TENSION OF AN ENDLESS FELT OR SCREEN IN PAPER MACHINES |
| DE4439889C1 (en) * | 1994-11-08 | 1996-08-14 | Erhardt & Leimer Gmbh | Continuous belt tension control, giving constant draw tension value at edges |
-
1997
- 1997-12-23 EP EP97890257A patent/EP0870870A3/en not_active Withdrawn
-
1998
- 1998-03-03 JP JP5092298A patent/JPH10297731A/en active Pending
- 1998-03-26 BR BR9800975-3A patent/BR9800975A/en not_active Application Discontinuation
- 1998-04-08 NO NO981649A patent/NO981649L/en not_active Application Discontinuation
- 1998-04-08 CA CA 2234274 patent/CA2234274A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009127888A2 (en) | 2008-04-14 | 2009-10-22 | Kodak Graphic Communications Canada Company | Roller alignment |
| EP2265524A2 (en) * | 2008-04-14 | 2010-12-29 | Kodak Graphic Communications Canada Company | Roller alignment |
| EP2265524A4 (en) * | 2008-04-14 | 2013-12-18 | Kodak Graphic Comm Canada Co | Roller alignment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10297731A (en) | 1998-11-10 |
| NO981649D0 (en) | 1998-04-08 |
| NO981649L (en) | 1998-10-12 |
| EP0870870A3 (en) | 1999-06-09 |
| BR9800975A (en) | 1999-09-28 |
| EP0870870A2 (en) | 1998-10-14 |
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