EP3597301B1 - Milling device - Google Patents
Milling device Download PDFInfo
- Publication number
- EP3597301B1 EP3597301B1 EP19184071.9A EP19184071A EP3597301B1 EP 3597301 B1 EP3597301 B1 EP 3597301B1 EP 19184071 A EP19184071 A EP 19184071A EP 3597301 B1 EP3597301 B1 EP 3597301B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- rotation
- bearing
- roller
- axis
- 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.)
- Active
Links
- 238000003801 milling Methods 0.000 title claims description 29
- 239000000314 lubricant Substances 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 description 52
- 230000005540 biological transmission Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000036316 preload Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 244000029687 Wikstroemia indica Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/06—Crushing or disintegrating by roller mills with two or more rollers specially adapted for milling grain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
- B02C4/38—Adjusting, applying pressure to, or controlling the distance between, milling members in grain mills
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/015—Arrangements for indicating the position of a controlling member
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
- G05G1/10—Details, e.g. of discs, knobs, wheels or handles
Definitions
- the present invention is concerned with grinding devices.
- Various types of grinding devices are used for a large number of industrial applications with which particulate grist is ground. These include, for example, milling roller mills, malt grist mills, feed mills and coffee grinders.
- Such grinding devices contain one or more sets of rollers, each with at least two rollers.
- the rollers can be held by a respective bearing body.
- a grinding gap is formed between the rollers and can be adjusted in many roller packs, for example by the bearing bodies being adjustable relative to one another.
- the known roll packs are essentially constructed according to the same principle: By means of a mechanical, pneumatic or electromechanical drive, the width of the grinding gap is reduced, ie "engaged", by shifting the movably mounted roll to an operating gap.
- the operating gap can then be further adapted during operation, for example manually or by motor.
- Devices for regulating the contact pressure of grinding rollers are disclosed. These devices contain adjustable springs that allow the grinding rollers to evade when hard foreign bodies pass through them.
- Roll stacks have a certain rigidity, which can be characterized by the dependence of the radial force acting between the rolls and the width of the grinding gap. This rigidity is made up of the rigidity of the rollers, the roller bearings and the remaining components of the roller set. In the engaged state, the positions of the rollers are therefore dependent on the forces prevailing in the grinding gap. Mainly the radial forces lead to a widening of the grinding gap.
- a roller set which contains a first roller, which is held by at least one first bearing body, and a second roller, which is held by at least one second bearing body.
- the first bearing body and the second bearing body are adjustable relative to one another in such a way that a grinding gap formed between the first roller and the second roller can be adjusted.
- the second bearing body can be pivotably supported on the first bearing body.
- the first bearing body and the second bearing body can be prestressed against one another by means of a clamping device in such a way that the first roller and the second roller are pressed towards each other.
- the first bearing body has at least one first stop body with a first stop surface and the second bearing body has at least one second stop body with a second stop surface, wherein the stop surfaces are designed and arranged or can be arranged on the bearing bodies such that contact of the stop surfaces counteracts contact of the rollers.
- counteraction does not necessarily mean that contact between the rollers is completely prevented; Such contact is also permitted within the scope of the present invention for very small predetermined grinding gap widths.
- the first stop body can be rotated about a first axis of rotation.
- the first stop surface is formed by a circumferential surface of the first stop body which is eccentric with respect to the first axis of rotation, specifically in such a way that the rotational position of the first stop body determines the minimum width of the grinding gap.
- the circumferential surface of the first stop body is referred to as eccentric here and below if it is not rotationally symmetrical with respect to the first axis of rotation, i.e. if it is caused by a rotation of the first stop body about the first axis of rotation by at least an angle greater than 0 ° and less than 360 ° is not converted into itself.
- the properties of the ground material can be set precisely, for example the starch damage, the water absorption and, above all, the particle size distribution of flour (especially if the gap occupancy and thus the splitting force varies due to a fluctuation in the mass flow supplied to the grinding device).
- the prestressing force prevailing by the clamping device between the stop bodies should be greater than the maximum expected force between the stop bodies, which results from the forces prevailing in the grinding gap.
- the tensioning device can be part of the roll assembly. However, it is preferred if the tensioning device is part of a machine stand of the grinding device and the roller set has a coupling device for releasable coupling with the tensioning device. This facilitates the assembly and disassembly of the roller pack. This coupling enables the clamping device of the machine stand to preload the bearing bodies of the roll assembly.
- the coupling device can be arranged on one of the bearing bodies.
- the circumferential surface of the first stop body can be cylindrical with respect to the first axis of rotation.
- the circumferential surface can for example have the shape of a spiral, at least in sections.
- a spiral is understood to mean that the distance between the circumferential surface and the first axis of rotation increases or decreases as a function of the angle.
- the spiral is preferably an Archimedean spiral, in which the distance depends linearly on the angle.
- the second stop body can be rotated about a second axis of rotation parallel to the first axis of rotation and the second stop surface by one relative to the second Axis of rotation rotationally symmetrical circumferential surface of the second stop body is formed. Because when the first stop body is rotated in order to adjust the width of the grinding gap, the peripheral surfaces of the two stop bodies can roll against one another, which results in significantly less friction and consequently the adjustment is made easier. This is important in the context of the present invention, since the stop bodies are preferably pressed against one another with a high preload.
- first axis of rotation of the first stop body and / or the second axis of rotation of the second stop body is arranged to be displaceable, in particular in a direction perpendicular to the first axis of rotation. While rotating the first stop body causes a fine adjustment of the grinding gap, a rough adjustment of the grinding gap can be achieved by moving at least one of the stop bodies.
- the roll package has a handwheel which can be rotated about a handwheel axis of rotation and which is coupled to the first stop body via a handwheel transmission in such a way that turning the handwheel causes the first stop body to rotate.
- a transmission can be selected in such a way that a comparatively small torque on the handwheel is translated into a large torque on the first stop body.
- the handwheel drive should preferably have the highest possible efficiency.
- a small gear backlash is also advantageous in order to enable the most precise possible position display on the handwheel and the most precise possible position of the first stop body. All of this is important in the context of the present invention, since the stop bodies are preferably pressed against one another with a high pretension.
- the handwheel transmission has several transmission inputs, in particular a first transmission input for the Handwheel and a second gear input for motorized adjustability.
- the method for operating a roller set as described above includes a step in which the first bearing body and the second bearing body are pretensioned against one another by means of the clamping device in such a way that the first roller and the second roller are pressed towards one another.
- the method can include a further step in which the first stop body is rotated about a first axis of rotation in order to set the minimum width of the grinding gap.
- the roller set has a force measuring device which contains a first sensor for determining a first force with which the first bearing body and the second bearing body are preloaded against one another, as well as a second sensor for determining a second force between the first stop body and the second stop body acts.
- One or both sensors can be force sensors for the direct determination of the forces.
- at least one of the two sensors can also be designed for indirect determination of the forces, for example as a pressure sensor with which a pressure prevailing in a cylinder (in particular in a bellows cylinder explained below) can be determined, from which the associated force can then be determined can.
- the force acting between the rollers can be calculated from the two forces determined directly or indirectly by the sensors.
- the first sensor can for example be integrated in the clamping device.
- the second sensor can for example be arranged on the second stop body.
- the method for determining the radial force acting between the rollers of such a package includes a step in which the force acting between the rollers is calculated from the forces determined by means of the sensors.
- position indicators are used in the prior art. If the operating gap is set as required, the position of the handwheel is referenced by turning the position indicator. In this way, if the grinding gap is to be adjusted, the basic state can be found again in a simple manner.
- the position indicator is received in the handwheel and, in the prior art, clamped by a radial adjusting screw and thus secured against twisting or slipping out. Another variant is axial clamping to the rear.
- a roller set for a grinding device which contains a first roller and a second roller as well as a handwheel rotatable about a handwheel axis of rotation, by means of which a grinding gap formed between the first roller and the second roller can be adjusted.
- it can be a set of rolls as described above.
- the roller package has a position indicator for displaying a position of the handwheel and the position indicator contains a position indicator housing and a display element which is movable along the handwheel axis of rotation relative to the position indicator housing and which is pretensioned or can be preloaded against the position indicator housing by means of a position indicator spring in the direction of the handwheel axis of rotation that it is secured in a holding position by contact with the position indicator housing against rotation about the handwheel axis of rotation and can only be rotated about the handwheel axis of rotation when the bias caused by the position indicator spring is overcome.
- the display element In order to be able to rotate the display element during referencing, it only has to be pressed by hand against the pre-tension and can then be rotated.
- the display element and the position display housing have contact surfaces which allow a form fit in the holding position. In this way, the disruptive influences of vibrations can be particularly effectively suppressed during the grinding operation. Alternatively or in addition to the form fit, there can also be a force fit in the holding position.
- the roll package can have an integrated roller device with at least one roller, which is arranged or can be arranged on the roll package in such a way that the roll package with the at least one roller can be placed on a horizontal base and moved thereon.
- rollers in roller bearings of the bearing bodies require the use of lubricants whose uncontrolled escape from the bearings should be prevented.
- sealing systems that are robust against over-lubrication or against harsh installation conditions, but which cannot completely prevent the lubricants from escaping.
- a bearing cover of the roller bearing supporting the roller stub can have on its inside a guide channel for lubricant which runs around the roller stub and which is connected to an outlet opening through which lubricant can escape from the guide channel.
- a collecting device for collecting the lubricant for example a collecting container, can be arranged below the outlet opening.
- the rollers are often cambered. However, if uniform grinding work cannot be achieved over the entire length of the roller, the crowning can be adjusted.
- the rollers i.e. tilting the roller axes
- the first roller is held by two first bearing bodies
- the second roller is held by two second bearing bodies and the first bearing bodies can be adjusted independently of one another and / or the second bearing bodies can be adjusted independently of one another.
- this can be achieved in that the second bearing body is pivotably supported on the first bearing body via a pivot bolt and the pivot bolt is adjustable relative to the first bearing body, for example in the vertical direction.
- the first bearing body has a wedge which is designed and arranged in such a way that a displacement of the wedge in a first direction relative to the first bearing body causes a displacement of the pivot pin in a second direction different from the first direction relative to the first bearing body causes.
- the second bearing body can also be adjustable relative to the first bearing body with the aid of an eccentric.
- the roller set furthermore contains a transmission which comprises a bearing housing in which an input shaft, a first output shaft and a second output shaft are received, the input shaft and the first output shaft perpendicular to one another and the first output shaft and the second output shaft to one another are arranged in parallel, the input shaft and the first output shaft are in operative connection with one another via a pair of bevel gears, the first output shaft and the second output shaft are operatively connected to one another via a torque transmission arrangement, the first output shaft is coupled to the first roller and the second output shaft is coupled to the second roller.
- a transmission which comprises a bearing housing in which an input shaft, a first output shaft and a second output shaft are received, the input shaft and the first output shaft perpendicular to one another and the first output shaft and the second output shaft to one another are arranged in parallel, the input shaft and the first output shaft are in operative connection with one another via a pair of bevel gears, the first output shaft and the second output shaft are operatively connected to one another via a torque transmission
- a Mahlungsvorrich device for example a milling roller mill with the features of claim 1 is provided.
- the grinding device contains a machine stand and at least one set of rollers which is or can be used in the machine stand. This results in the advantages already explained above for the roller set for the grinding device.
- the machine frame has a clamping device and the roll set has a coupling device for releasable coupling with the clamping device. This is because this facilitates the assembly and disassembly of the roller set.
- the tensioning device can have a cylinder, which is preferably designed as a bellows cylinder. It is particularly preferred if the bellows cylinder is coupled to a vent valve.
- the tensioning device can furthermore have at least one pretensioned spring, in particular connected in series with the cylinder.
- the pretensioned spring can be a well-known disk spring package.
- the tensioning device can contain a tie rod, a tie rod pivotably mounted at a first end of the tie rod, a tie rod partially received in the tie sleeve and pretensioned by means of a spring, and the cylinder which is coupled to a second end of the tie rod.
- the tie rod can be coupled to a coupling device of the roller set arranged on the second bearing body. In the assembled state of the roller set, the tie rod can be supported in a support point located between its ends on the bearing body. By activating the cylinder, the second end of the tie rod can be pressed against the first bearing body and supported thereon, whereby the total torque acting on the roller set can be reduced.
- the tie rod can be swiveled around the support point and thus pull on the tension bushing and on the tie rod. In this way, the first bearing body and the second bearing body can be preloaded against one another in such a way that the first roller and the second roller are pressed towards one another.
- rollers of a grinding device have to be replaced, for example for inspection purposes.
- the rollers can be removed one after the other, or the entire package can be removed.
- the rollers can be accommodated on the grinding surfaces, on the bearing bodies or on the roller stubs. In the first variant, it is raised by hydraulic lifting tables and then rolled out. When it is received on the bearing bodies, rollers are first mounted, and then the roller set is raised by lowering the rollers and then rolled out on the rollers. Chain hoists can be used to lift them for hanging on the roller stubs and the chain hoists can then be moved in rails. A horizontal mounting on the roller stubs is also possible by attaching rollers to them and moving them in rails.
- the document EP 1 201 308 A1 disclosed a roller set according to the preamble of claim 1.
- the roller set has integrated rollers which can be set down by means of an eccentric so that the roller set can be raised.
- rollers must first be installed or at least adjusted in a preparatory step for rolling out.
- lifting of the roller pack is in accordance with EP 1 201 308 A1 quite laborious.
- the roller set has an integrated roller device with at least one roller which is arranged or can be arranged on the roller set in such a way that the roller set with the at least one roller is on a horizontal base can be placed and moved on it.
- the machine stand has at least one rail on which the at least one roller of the roll set can be moved during the assembly and / or disassembly of the roll set.
- the roller set has at least one contact surface, and the machine frame has at least one counter-contact surface.
- the contact surface and the mating contact surface are matched to one another and to the at least one rail in such a way that the at least one roller of the roller set does not rest on the rail in a mounting position of the roller set due to a form fit between the contact surface and the mating contact surface.
- the package is not raised during dismantling, but rather is lowered onto the rollers.
- the rollers of the roller pack do not rest on the rail in the assembly position, which protects the rollers.
- the Figures 1 and 2 show a roll pack 10 for a milling roll mill in a side view.
- the roll package 10 contains a first roll 11, which is held by two first bearing bodies 13, and a second roll 12, which is held by two second bearing bodies 14.
- the second bearing bodies 14 are pivotably supported on the first bearing bodies 13 via pivot pins 57.
- the one in the Figures 3a to 3c Milling roller chair 70 shown has a machine stand 71 and two roller packs 10 arranged one above the other and thus in a space-saving manner.
- Each roller pack 10 can be driven by means of a gear 43 which comprises a bearing housing 44 in which an input shaft (not shown here), a first output shaft 46 and a second Output shaft 47 are added.
- the input shaft and the first output shaft 46 are perpendicular to one another, and the first output shaft 46 and the second output shaft 47 are arranged parallel to one another.
- the input shaft and the first output shaft 46 are operatively connected to one another via a pair of bevel gears, which cannot be seen here, and the first output shaft 46 and the second output shaft 47 are via a torque transmission arrangement, which is also not shown in operative connection with one another.
- the first output shaft is coupled to the first roller 11, and the second output shaft 47 to the second roller 12.
- the gear 43 allows the second roller 12 to be movably supported.
- the first bearing body 13 also has a first stop body 17, rotatable about a first axis of rotation A1, with a first stop surface 18. This is formed by a circumferential surface 18 of the first stop body 17 which is eccentric with respect to the first axis of rotation A1.
- the second bearing body 14 has a second stop body 19, rotatable about a second rotation axis A2 parallel to the first rotation axis A1, with a second stop surface 20. This is formed by a circumferential surface 20 of the second stop body 19 that is rotationally symmetrical with respect to the second rotation axis A2.
- the two stop surfaces 18, 20 are designed and arranged on the bearing bodies 13, 14 such that contact of the stop surfaces 18, 20 counteracts contact of the rollers 11, 12, as will be explained below.
- Figure 1 shows a disengaged position of the roller set 10, in which the stop surfaces 18, 20 are not in contact with one another.
- a clamping device 16 which is part of the machine frame 71 and is only partially shown here, the first bearing body 13 and the second bearing body 14 can be adjusted relative to one another in such a way that a grinding gap formed between the first roller 11 and the second roller 12 can be adjusted.
- the tensioning device 16 contains a tie rod 51, a tie rod 52 pivotably mounted on an upper end 67 of the tie rod 51 via a joint 54, a tie rod 52 partially received in the tie bush 55 and preloaded by means of a plate spring assembly 41, and a bellows cylinder 40 which is connected to a lower End of 68 des Tie rod 51 is coupled and only in Figure 4 is shown.
- the tie rod 52 is coupled to the second bearing body 14 by a coupling direction 66 arranged on the second bearing body 14.
- the tie rod 51 is supported in a support point 75 on the first bearing body 13 as long as the roller set 10 is installed.
- Figure 4 shows a side view of a milling roller frame 70 with the roller set 10.
- the storage via the bellows cylinder 40 causes overload protection.
- the bellows cylinder is coupled to a sufficiently dimensioned vent valve so that the pressure in the bellows cylinder can be quickly reduced by opening the vent valve. Without opening the vent valve, there would also be an increase in force, which, however, would be much smaller than if only one set of springs were present.
- the first axis of rotation A1 of the first stop body 17 and the second axis of rotation A2 of the second stop body 19 are arranged displaceably, namely in a direction perpendicular to the axes of rotation A1, A2.
- the roller set 10 also has a handwheel 21 which can be rotated about a handwheel axis of rotation H.
- the handwheel 21 is via an in Figure 5
- the handwheel mechanism 22 shown is coupled to the first stop body 17. It is designed in such a way that turning the handwheel 21 causes the first stop body 17 to turn. As a result, a comparatively small torque on the handwheel 21 can be translated into a large torque on the first stop body 17.
- the handwheel gear 22 has a high degree of efficiency and a small gear backlash for the purposes mentioned above.
- the roller set 10 also has a in detail in Figure 6 Position indicator 26 shown for displaying a position of the handwheel 21.
- the position indicator 26 contains a position indicator housing 27 and a display element 28 which is movable along the handwheel axis of rotation H relative to the position indicator housing 27.
- the display element 28 is by means of at least one position indicator spring 29 in the direction of the handwheel axis of rotation H against the position indicator housing 27 is preloaded or preloaded so that it can only be rotated about the handwheel axis of rotation H when the preload caused by the position indicator spring 29 is overcome. This is done by positive locking elements 53 on display element 28 and on position display housing 27.
- the roller set 10 comprises a force measuring device, which contains a first force sensor 24 and a second force sensor 25.
- the first force sensor 24 is integrated in the clamping device 16, namely in the area of the joint 54 formed between the tie rod 51 and the tie rod 52; the second force sensor 25 is located on the second stop body 19 (see Figure 7 ).
- a first force can be determined with the first sensor 24, with which the first bearing body 13 and the second bearing body 14 are preloaded against each other, and with the second sensor 25 a second force can be determined, which between the first stop body 17 and the second Stop body 19 acts.
- the force acting between the rollers 11, 12 can be calculated from these forces.
- FIG 8 it is shown in detail how the second bearing bodies 14 are pivotably supported on the first bearing bodies 13 via pivot pins 57.
- the first bearing bodies 13 each contain a wedge 39 through which an adjusting screw 56 is guided.
- Turning the adjusting screw 56 causes a displacement of the wedge 39 in a horizontal first direction R1 and thus a displacement of the pivot pin 57 and the second bearing body 14 in a second direction R2 vertical to the first direction R1.
- the second bearing bodies 14 can be individually adjusted relative to the first bearing bodies 13, which enables the roller axes to be tilted.
- FIGS. 9 and 10 show in detail a roller bearing 58 and its seal.
- a roller stub 33 of the second roller 12 is supported by an inner ring 59, a plurality of roller bodies 60 and an outer ring 61.
- In the axial direction thereof there is an inner bearing cover 62 and an outer bearing cover 63, which have grooves 64 running around the roller stub 33 on their inner sides 34 for seals (not shown here) and guide channels 35 for lubricants.
- the guide channel 35 of the outer bearing cover 63 is connected to an outlet opening 36 through which lubricant can exit from the guide channel 35 of the outer bearing cover 63.
- a collecting device 37 for collecting the lubricant which is designed in the form of a trough 37.
- a connecting bore not shown, between the interior space and the guide channel 35 in order to prevent over-greasing and thus excess grease can escape through this connecting bore.
- the roll package 10 has an integrated rolling device 30 with rollers 31.
- the rollers 31 are arranged on the roller set 10 in such a way that the roller set 10 with the rollers 31 can be placed on a horizontal base (not shown here) and can be moved thereon.
- the machine stand 71 of the milling roller frame 70 according to FIG Figure 12 Rails 72 on which the rollers 31 of the roller set 10 can be moved during the assembly and / or disassembly of the roller set 10.
- the roll package 10 also has front contact surfaces 76 (see Figure 8 ) and rear contact surfaces 42, and the machine frame 71 has corresponding counter-contact surfaces 73.
- the contact surfaces 42, 76 and the counter-contact surface 73 are coordinated with one another and with the rails 72 in such a way that the rollers 31 in a mounting position of the roller set 10 due to a form fit between of the contact surface 42, 76 and the mating contact surface 73 do not rest on the rail 72.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Crushing And Grinding (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Disintegrating Or Milling (AREA)
Description
Die vorliegende Erfindung befasst sich mit Vermahlungsvorrichtungen. Für eine Vielzahl industrieller Anwendungen werden verschiedenartige Vermahlungsvorrichtungen eingesetzt, mit denen partikelförmiges Mahlgut vermahlen wird. Hierzu gehören beispielsweise Müllereiwalzenstühle, Malzschrotmühlen, Futtermühlen und Kaffeemühlen. Derartige Vermahlungsvorrichtungen enthalten ein oder mehrere Walzenpakete mit jeweils mindestens zwei Walzen. Die Walzen können von einem jeweiligen Lagerkörper gehalten werden. Zwischen den Walzen ist ein Mahlspalt gebildet, der in vielen Walzenpaketen verstellbar ist, beispielsweise indem die Lagerkörper relativ zueinander verstellbar sind.
Die bekannten Walzenpakete sind im Wesentlichen nach dem gleichen Prinzip aufgebaut: Durch einen mechanischen, pneumatischen oder elektromechanischen Antrieb wird die Breite des Mahlspalts durch Verschieben der beweglich gelagerten Walze auf einen Betriebsspalt verkleinert, d. h. "eingerückt". Der Betriebsspalt kann dann im Betrieb weiter angepasst werden, beispielsweise manuell oder motorisch.
In den Dokumenten
Walzenpakete haben eine gewisse Steifigkeit, die durch die Abhängigkeit der zwischen den Walzen wirkenden radialen Kraft und der Breite des Mahlspalts charakterisiert werden kann. Diese Steifigkeit setzt sich zusammen aus den Steifigkeiten der Walzen, der Wälzlager und der restlichen Komponenten des Walzenpakets. Im eingerückten Zustand sind die Positionen der Walzen somit abhängig von den im Mahlspalt herrschenden Kräften. Hauptsächlich die radialen Kräfte führen zu einer Verbreiterung des Mahlspalts. Solange die Kräfte konstant sind, kann dies im Betrieb korrigiert werden und hat dann keinen negativen Einfluss.
Bei Mahlgut, das sich nur schwierig zwischen die Walzen einziehen lässt, sind die Kräfte im Mahlspalt jedoch sehr variabel. Passiert das Mahlgut den Mahlspalt, werden die Walzen auseinandergedrückt. Wird kurzzeitig kein Mahlgut eingezogen, berühren sich die Walzen. Bei einer solchen Situation hat die Spaltsteifigkeit einen grossen Einfluss auf das Verhalten und die Eigenschaften des Mahlguts.The present invention is concerned with grinding devices. Various types of grinding devices are used for a large number of industrial applications with which particulate grist is ground. These include, for example, milling roller mills, malt grist mills, feed mills and coffee grinders. Such grinding devices contain one or more sets of rollers, each with at least two rollers. The rollers can be held by a respective bearing body. A grinding gap is formed between the rollers and can be adjusted in many roller packs, for example by the bearing bodies being adjustable relative to one another.
The known roll packs are essentially constructed according to the same principle: By means of a mechanical, pneumatic or electromechanical drive, the width of the grinding gap is reduced, ie "engaged", by shifting the movably mounted roll to an operating gap. The operating gap can then be further adapted during operation, for example manually or by motor.
In the documents
Roll stacks have a certain rigidity, which can be characterized by the dependence of the radial force acting between the rolls and the width of the grinding gap. This rigidity is made up of the rigidity of the rollers, the roller bearings and the remaining components of the roller set. In the engaged state, the positions of the rollers are therefore dependent on the forces prevailing in the grinding gap. Mainly the radial forces lead to a widening of the grinding gap. As long as the forces are constant, this can be corrected during operation and then has no negative influence.
In the case of grinding stock that is difficult to pull in between the rollers, the forces in the grinding gap are very variable. If the grist passes the grinding gap, the rollers are pushed apart. If no regrind is drawn in for a short time, the rollers touch. In such a situation, the stiffness of the gap has a major influence on the behavior and properties of the regrind.
Es wird hier ein Walzenpaket beschrieben, das eine erste Walze, welche von mindestens einem ersten Lagerkörper gehalten wird, und eine zweite Walze, welche von mindestens einem zweiten Lagerkörper gehalten wird, enthält. Der erste Lagerkörper und der zweite Lagerkörper sind derart relativ zueinander verstellbar, dass ein zwischen der ersten Walze und der zweiten Walze gebildeter Mahlspalt verstellbar ist. Beispielsweise kann der zweite Lagerkörper schwenkbar am ersten Lagerkörper abgestützt sein. Der erste Lagerkörper und der zweite Lagerkörper sind mittels einer Spanneinrichtung derart gegeneinander vorspannbar, dass die erste Walze und die zweite Walze aufeinander zu gedrückt werden.A roller set is described here which contains a first roller, which is held by at least one first bearing body, and a second roller, which is held by at least one second bearing body. The first bearing body and the second bearing body are adjustable relative to one another in such a way that a grinding gap formed between the first roller and the second roller can be adjusted. For example, the second bearing body can be pivotably supported on the first bearing body. The first bearing body and the second bearing body can be prestressed against one another by means of a clamping device in such a way that the first roller and the second roller are pressed towards each other.
Es ist vorgesehen, dass der erste Lagerkörper mindestens einen ersten Anschlagkörper mit einer ersten Anschlagfläche aufweist und der zweite Lagerkörper mindestens einen zweiten Anschlagkörper mit einer zweiten Anschlagfläche aufweist, wobei die Anschlagflächen derart ausgebildet und an den Lagerkörpern angeordnet oder anordenbar sind, dass ein Kontakt der Anschlagflächen einem Kontakt der Walzen entgegenwirkt. Unter einem Entgegenwirken wird hier und im Folgenden nicht zwangsläufig verstanden, dass ein Kontakt der Walzen vollständig verhindert wird; ein solcher Kontakt ist bei sehr kleinen vorgegebenen Mahlspaltbreiten auch im Rahmen der vorliegenden Erfindung erlaubt.
Weiterhin ist der erste Anschlagkörper um eine erste Drehachse rotierbar. Die erste Anschlagfläche ist durch eine bezüglich der ersten Drehachse exzentrische Umfangsfläche des ersten Anschlagkörpers gebildet, und zwar derart, dass die Drehposition des ersten Anschlagkörpers die minimale Breite des Mahlspalts bestimmt. Die Umfangsfläche des ersten Anschlagkörpers wird hier und im Folgenden als exzentrisch bezeichnet, wenn sie bezüglich der ersten Drehachse nicht rotationssymmetrisch ist, also wenn sie durch eine Drehung des ersten Anschlagkörpers um die erste Drehachse um mindestens einen Winkel, der grösser als 0° und kleiner als 360° ist, nicht in sich selbst überführt wird.It is provided that the first bearing body has at least one first stop body with a first stop surface and the second bearing body has at least one second stop body with a second stop surface, wherein the stop surfaces are designed and arranged or can be arranged on the bearing bodies such that contact of the stop surfaces counteracts contact of the rollers. Here and in the following, counteraction does not necessarily mean that contact between the rollers is completely prevented; Such contact is also permitted within the scope of the present invention for very small predetermined grinding gap widths.
Furthermore, the first stop body can be rotated about a first axis of rotation. The first stop surface is formed by a circumferential surface of the first stop body which is eccentric with respect to the first axis of rotation, specifically in such a way that the rotational position of the first stop body determines the minimum width of the grinding gap. The circumferential surface of the first stop body is referred to as eccentric here and below if it is not rotationally symmetrical with respect to the first axis of rotation, i.e. if it is caused by a rotation of the first stop body about the first axis of rotation by at least an angle greater than 0 ° and less than 360 ° is not converted into itself.
Variiert bei einem o.g. Walzenpaket die im Mahlspalt herrschende Kraft, so ändert sich lediglich die Vorspannkraft zwischen den Lagerkörpern, nicht aber deren relative Position. Die einzige Nachgiebigkeit bezüglich des Mahlspalts ergibt sich also aus den Walzen und Lagern. Durch ein Drehen des ersten Anschlagkörpers können die Eigenschaften des gemahlenen Mahlguts präzise eingestellt werden, wie beispielsweise die Stärkebeschädigung, die Wasseraufnahme und vor allem die Partikelgrössenverteilung von Mehl (besonders wenn aufgrund einer Schwankung des der Vermahlungsvorrichtung zugeführten Massenstroms die Spaltbelegung und somit die Spaltkraft variiert).If the force prevailing in the grinding gap varies with the above-mentioned roller set, only the pretensioning force between the bearing bodies changes, but not their relative position. The only flexibility with regard to the grinding gap therefore results from the rollers and bearings. By rotating the first stop body, the properties of the ground material can be set precisely, for example the starch damage, the water absorption and, above all, the particle size distribution of flour (especially if the gap occupancy and thus the splitting force varies due to a fluctuation in the mass flow supplied to the grinding device).
Um zu verhindern, dass die Anschlagkörper ausser Kontakt geraten und damit die Breite des Mahlspalts zu gross wird, sollte die von der Spanneinrichtung zwischen den Anschlagkörpern herrschende Vorspannkraft grösser sein als die maximal erwartete Kraft zwischen den Anschlagkörpern, die von den im Mahlspalt herrschenden Kräften herrührt.In order to prevent the stop bodies from getting out of contact and thus the width of the grinding gap becoming too large, the prestressing force prevailing by the clamping device between the stop bodies should be greater than the maximum expected force between the stop bodies, which results from the forces prevailing in the grinding gap.
Die Spanneinrichtung kann Bestandteil des Walzenpakets sein. Allerdings ist es bevorzugt, wenn die Spanneinrichtung Bestandteil eines Maschinenständers der Vermahlungsvorrichtung ist und das Walzenpaket eine Kopplungseinrichtung zur lösbaren Kopplung mit der Spanneinrichtung aufweist. Dies erleichtert die Montage und Demontage des Walzenpakets. Durch diese Kopplung kann die Spanneinrichtung des Maschinenständers die Vorspannung der Lagerkörper des Walzenpakets bewirken. Die Kopplungseinrichtung kann an einem der Lagerkörper angeordnet sein.The tensioning device can be part of the roll assembly. However, it is preferred if the tensioning device is part of a machine stand of the grinding device and the roller set has a coupling device for releasable coupling with the tensioning device. This facilitates the assembly and disassembly of the roller pack. This coupling enables the clamping device of the machine stand to preload the bearing bodies of the roll assembly. The coupling device can be arranged on one of the bearing bodies.
Die Umfangsfläche des ersten Anschlagkörpers kann bezüglich der ersten Drehachse zylinderförmig sein. In Umfangsrichtung bezüglich der ersten Drehachse kann die Umfangsfläche beispielsweise zumindest abschnittsweise die Form einer Spirale aufweisen. Unter einer Spirale wird verstanden, dass der Abstand der Umfangsfläche von der ersten Drehachse in Abhängigkeit vom Winkel grösser oder kleiner wird. Die Spirale ist bevorzugt eine archimedische Spirale, bei der der Abstand linear vom Winkel abhängt.The circumferential surface of the first stop body can be cylindrical with respect to the first axis of rotation. In the circumferential direction with respect to the first axis of rotation, the circumferential surface can for example have the shape of a spiral, at least in sections. A spiral is understood to mean that the distance between the circumferential surface and the first axis of rotation increases or decreases as a function of the angle. The spiral is preferably an Archimedean spiral, in which the distance depends linearly on the angle.
Es ist vorteilhaft, wenn der zweite Anschlagkörper um eine zur ersten Drehachse parallele zweite Drehachse rotierbar ist und die zweite Anschlagfläche durch eine bezüglich der zweiten Drehachse rotationssymmetrische Umfangsfläche des zweiten Anschlagkörpers gebildet ist. Denn wenn der erste Anschlagkörper gedreht wird, um die Breite des Mahlspalts zu verstellen, können die Umfangsflächen der beiden Anschlagkörper aneinander abrollen, wodurch eine deutlich geringere Reibung entsteht und folglich die Verstellung erleichtert wird. Dies ist im Rahmen der vorliegenden Erfindung von Bedeutung, da die Anschlagkörper bevorzugt mit einer hohen Vorspannung gegeneinander gedrückt werden.It is advantageous if the second stop body can be rotated about a second axis of rotation parallel to the first axis of rotation and the second stop surface by one relative to the second Axis of rotation rotationally symmetrical circumferential surface of the second stop body is formed. Because when the first stop body is rotated in order to adjust the width of the grinding gap, the peripheral surfaces of the two stop bodies can roll against one another, which results in significantly less friction and consequently the adjustment is made easier. This is important in the context of the present invention, since the stop bodies are preferably pressed against one another with a high preload.
Ferner ist es zweckmässig, wenn die erste Drehachse des ersten Anschlagkörpers und/oder die zweite Drehachse des zweiten Anschlagkörpers verschiebbar angeordnet ist, insbesondere in einer zur ersten Drehachse senkrechten Richtung. Während ein Drehen des ersten Anschlagkörpers eine Feinverstellung des Mahlspalts bewirkt, kann durch ein Verschieben mindestens eines der Anschlagkörper eine Grobverstellung des Mahlspalts erreicht werden.Furthermore, it is expedient if the first axis of rotation of the first stop body and / or the second axis of rotation of the second stop body is arranged to be displaceable, in particular in a direction perpendicular to the first axis of rotation. While rotating the first stop body causes a fine adjustment of the grinding gap, a rough adjustment of the grinding gap can be achieved by moving at least one of the stop bodies.
Die Feinverstellung wird nochmals erleichtert, wenn das Walzenpaket ein um eine Handraddrehachse drehbares Handrad aufweist, welches über ein Handradgetriebe derart mit dem ersten Anschlagkörper gekoppelt ist, dass ein Drehen des Handrads ein Drehen des ersten Anschlagkörpers bewirkt. Auf an sich bekannte Weise kann ein Getriebe derart gewählt werden, dass ein vergleichsweise kleines Drehmoment am Handrad zu einem grossen Drehmoment am ersten Anschlagkörper übersetzt wird. Bevorzugt sollte das Handradgetriebe einen möglichst hohen Wirkungsgrad haben. Ebenfalls von Vorteil ist ein kleines Getriebespiel, um eine möglichst genaue Positionsanzeige am Handrad und eine möglichst genaue Stellung des ersten Anschlagkörpers zu ermöglichen. All dies ist im Rahmen der vorliegenden Erfindung von Bedeutung, da die Anschlagkörper bevorzugt mit einer hohen Vorspannung gegeneinander gedrückt werden. Ausserdem ist es bevorzugt, wenn das Handradgetriebe mehrere Getriebeeingänge aufweist, insbesondere einen ersten Getriebeeingang für das Handrad und einen zweiten Getriebeeingang für eine motorische Verstellbarkeit.The fine adjustment is made even easier if the roll package has a handwheel which can be rotated about a handwheel axis of rotation and which is coupled to the first stop body via a handwheel transmission in such a way that turning the handwheel causes the first stop body to rotate. In a manner known per se, a transmission can be selected in such a way that a comparatively small torque on the handwheel is translated into a large torque on the first stop body. The handwheel drive should preferably have the highest possible efficiency. A small gear backlash is also advantageous in order to enable the most precise possible position display on the handwheel and the most precise possible position of the first stop body. All of this is important in the context of the present invention, since the stop bodies are preferably pressed against one another with a high pretension. In addition, it is preferred if the handwheel transmission has several transmission inputs, in particular a first transmission input for the Handwheel and a second gear input for motorized adjustability.
Das Verfahren zum Betreiben eines wie oben beschriebenen Walzenpakets enthält einen Schritt, in dem der erste Lagerkörper und der zweite Lagerkörper mittels der Spanneinrichtung derart gegeneinander vorspannt werden, dass die erste Walze und die zweite Walze aufeinander zu gedrückt werden.
Um die minimale Breite des Mahlspalts einzustellen, kann das Verfahren einen weiteren Schritt enthalten, in dem der erste Anschlagkörper um eine erste Drehachse rotiert wird, um die minimale Breite des Mahlspalts einzustellen.
Des Weiteren ist es sinnvoll, wenn das Walzenpaket eine Kräftemesseinrichtung aufweist, die einen ersten Sensor zur Bestimmung einer ersten Kraft enthält, mit der der erste Lagerkörper und der zweite Lagerkörper gegeneinander vorgespannt sind, sowie einen zweiten Sensor zur Bestimmung einer zweiten Kraft, die zwischen dem ersten Anschlagkörper und dem zweiten Anschlagkörper wirkt. Bei einem oder beiden Sensoren kann es sich um Kraftsensoren zur direkten Bestimmung der Kräfte handeln. Alternativ kann aber auch mindestens einer der beiden Sensoren zur indirekten Bestimmung der Kräfte ausgebildet sein, beispielsweise als Drucksensor, mit dem ein in einem Zylinder (insbesondere in einem weiter unten erläuterten Balgzylinder) herrschender Druck bestimmt werden kann, aus dem dann die zugehörige Kraft ermittelt werden kann. Aus den beiden von den Sensoren direkt oder indirekt bestimmten Kräften kann die zwischen den Walzen wirkende Kraft berechnet werden.
Der erste Sensor kann beispielsweise in der Spanneinrichtung integriert sein. Der zweite Sensor kann beispielsweise am zweiten Anschlagkörper angeordnet sein.The method for operating a roller set as described above includes a step in which the first bearing body and the second bearing body are pretensioned against one another by means of the clamping device in such a way that the first roller and the second roller are pressed towards one another.
In order to set the minimum width of the grinding gap, the method can include a further step in which the first stop body is rotated about a first axis of rotation in order to set the minimum width of the grinding gap.
Furthermore, it makes sense if the roller set has a force measuring device which contains a first sensor for determining a first force with which the first bearing body and the second bearing body are preloaded against one another, as well as a second sensor for determining a second force between the first stop body and the second stop body acts. One or both sensors can be force sensors for the direct determination of the forces. Alternatively, at least one of the two sensors can also be designed for indirect determination of the forces, for example as a pressure sensor with which a pressure prevailing in a cylinder (in particular in a bellows cylinder explained below) can be determined, from which the associated force can then be determined can. The force acting between the rollers can be calculated from the two forces determined directly or indirectly by the sensors.
The first sensor can for example be integrated in the clamping device. The second sensor can for example be arranged on the second stop body.
Das Verfahren zur Bestimmung der zwischen den Walzen eines solchen Pakets wirkenden radialen Kraft enthält einen Schritt, in dem die zwischen den Walzen wirkende Kraft aus den mittels der Sensoren bestimmten Kräften berechnet wird.
Um auf möglichst einfache Weise (ohne elektronische Elemente wie Spaltsensoren oder Encoder) die Stellung eines wie oben bereits erwähnten Handrads anzuzeigen, werden im Stand der Technik Positionsanzeigen eingesetzt. Ist der Betriebsspalt wie gewünscht eingestellt, wird die Stellung des Handrads durch Drehen der Positionsanzeige referenziert. Damit kann bei erforderlicher Anpassung des Mahlspalts der Grundzustand auf einfache Weise wiedergefunden werden. Die Positionsanzeige wird im Handrad aufgenommen und im Stand der Technik durch eine radiale Stellschraube geklemmt und so gegen ein Verdrehen oder Herausrutschen gesichert. Eine andere Variante ist das axiale Spannen nach hinten. Die beim Mahlbetrieb entstehenden Vibrationen können die Positionsanzeige jedoch erheblich beinträchtigen.
Ölgefüllte Positionsanzeigen sind diesbezüglich zwar robuster; jedoch ist die Klemmung der Positionsanzeige damit noch kritischer: zu schwach verspannt löst sich die Positionsanzeige, zu stark verspannt kann sie zu Bruch gehen. Es wurde bereits versucht, dieses Problem mit Spezialschrauben auszuräumen. Allerdings kann eine solche Spezialschraube abhandenkommen. Wird sie durch eine gewöhnliche Schraube ersetzt, kann es zu Leckagen kommen. Ebenfalls nachteilig ist, dass für die Referenzierung ein Werkzeug nötig ist und dass die Schrauben klein und oft schlecht zugänglich sind.The method for determining the radial force acting between the rollers of such a package includes a step in which the force acting between the rollers is calculated from the forces determined by means of the sensors.
In order to display the position of a handwheel as already mentioned above in the simplest possible way (without electronic elements such as gap sensors or encoders), position indicators are used in the prior art. If the operating gap is set as required, the position of the handwheel is referenced by turning the position indicator. In this way, if the grinding gap is to be adjusted, the basic state can be found again in a simple manner. The position indicator is received in the handwheel and, in the prior art, clamped by a radial adjusting screw and thus secured against twisting or slipping out. Another variant is axial clamping to the rear. However, the vibrations that occur during milling operations can significantly impair the position indicator.
Oil-filled position indicators are more robust in this regard; However, the clamping of the position indicator is even more critical: if the position indicator is too weakly tensioned, it loosens, and if it is too tightly tensioned, it can break. Attempts have already been made to overcome this problem with special screws. However, such a special screw can get lost. If it is replaced with an ordinary screw, leakage can occur. Another disadvantage is that a tool is required for referencing and that the screws are small and often difficult to access.
Es ist vorteilhaft, diese Nachteile zu beseitigen und insbesondere ein Walzenpaket mit einer Positionsanzeige bereitzustellen, die den beim Mahlen auftretenden Vibrationen standhalten kann und die leicht eingestellt werden kann.It is advantageous to eliminate these disadvantages and, in particular, to provide a roller set with a position indicator that shows the during grinding can withstand occurring vibrations and which can be easily adjusted.
Dafür wird ein Walzenpaket für eine Vermahlungsvorrichtung vorgeschlagen, welches eine erste Walze und eine zweite Walze sowie ein um eine Handraddrehachse drehbares Handrad enthält, mittels dessen ein zwischen der ersten Walze und der zweiten Walze gebildeter Mahlspalt einstellbar ist. Beispielsweise kann es sich um ein wie oben beschriebenes Walzenpaket handeln. Erfindungsgemäss ist vorgesehen, dass das Walzenpaket eine Positionsanzeige zum Anzeigen einer Position des Handrads aufweist und die Positionsanzeige ein Positionsanzeigengehäuse und ein entlang der Handraddrehachse relativ zum Positionsanzeigengehäuse bewegliches Anzeigeelement enthält, welches mittels einer Positionsanzeigenfeder derart in Richtung der Handraddrehachse gegen das Positionsanzeigengehäuse vorgespannt oder vorspannbar ist, dass es in einer Halteposition durch Kontakt mit dem Positionsanzeigengehäuse gegen ein Verdrehen um die Handraddrehachse gesichert ist und nur bei Überwindung der durch die Positionsanzeigenfeder bewirkten Vorspannung um die Handraddrehachse drehbar ist.
Um das Anzeigeelement beim Referenzieren drehen zu können, muss es lediglich von Hand entgegen der Vorspannung gedrückt werden und kann anschliessend gedreht werden. Hierdurch erübrigen sich die oben erwähnten Schrauben und Werkzeuge. Ausserdem können die störenden Einflüsse von Vibrationen während des Mahlbetriebs wirkungsvoll unterbunden werden.
In einer möglichen Ausführungsform weisen das Anzeigeelement und das Positionsanzeigengehäuse Kontaktflächen auf, die in der Halteposition einen Formschluss erlauben. Hierdurch können die störenden Einflüsse von Vibrationen während des Mahlbetriebs besonders wirkungsvoll unterdrückt werden. Alternativ oder zusätzlich zum Formschluss kann in der Halteposition aber auch ein Kraftschluss vorliegen.For this purpose, a roller set for a grinding device is proposed which contains a first roller and a second roller as well as a handwheel rotatable about a handwheel axis of rotation, by means of which a grinding gap formed between the first roller and the second roller can be adjusted. For example, it can be a set of rolls as described above. According to the invention it is provided that the roller package has a position indicator for displaying a position of the handwheel and the position indicator contains a position indicator housing and a display element which is movable along the handwheel axis of rotation relative to the position indicator housing and which is pretensioned or can be preloaded against the position indicator housing by means of a position indicator spring in the direction of the handwheel axis of rotation that it is secured in a holding position by contact with the position indicator housing against rotation about the handwheel axis of rotation and can only be rotated about the handwheel axis of rotation when the bias caused by the position indicator spring is overcome.
In order to be able to rotate the display element during referencing, it only has to be pressed by hand against the pre-tension and can then be rotated. This eliminates the need for the screws and tools mentioned above. In addition, the disruptive influences of vibrations during the grinding operation can be effectively prevented.
In one possible embodiment, the display element and the position display housing have contact surfaces which allow a form fit in the holding position. In this way, the disruptive influences of vibrations can be particularly effectively suppressed during the grinding operation. Alternatively or in addition to the form fit, there can also be a force fit in the holding position.
Beispielsweise zu Revisionszwecken ist es gelegentlich erforderlich, eine oder mehrere Walzen einer Vermahlungsvorrichtung auszutauschen. Zu diesem Zweck kann das Walzenpaket eine integrierte Rolleinrichtung mit mindestens einer Rolle aufweisen, die derart am Walzenpaket angeordnet oder anordenbar ist, dass das Walzenpaket mit der mindestens einen Rolle auf eine horizontalen Unterlage auflegbar und darauf verfahrbar ist.For example, for inspection purposes, it is occasionally necessary to replace one or more rollers of a grinding device. For this purpose, the roll package can have an integrated roller device with at least one roller, which is arranged or can be arranged on the roll package in such a way that the roll package with the at least one roller can be placed on a horizontal base and moved thereon.
Die Lagerung der Walzen in Wälzlagern der Lagerkörper erfordert den Einsatz von Schmierstoffen, deren unkontrollierter Austritt aus den Lagern verhindert werden sollte. Es existieren Dichtungssysteme, die zwar robust gegen Überschmieren oder gegen raue Montagebedingungen sind, die aber einen Austritt der Schmierstoffe nicht vollständig verhindern können.The storage of the rollers in roller bearings of the bearing bodies requires the use of lubricants whose uncontrolled escape from the bearings should be prevented. There are sealing systems that are robust against over-lubrication or against harsh installation conditions, but which cannot completely prevent the lubricants from escaping.
Um einen kontrollierten Austritt der Schmierstoffe zu ermöglichen, kann ein Lagerdeckel des den Walzenstummel lagernden Wälzlagers an seiner Innenseite eine den Walzenstummel umlaufende Führungsrinne für Schmiermittel aufweisen, die mit einer Auslassöffnung verbunden ist, durch welche Schmiermittel aus der Führungsrinne austreten kann. Unterhalb der Auslassöffnung kann eine Sammeleinrichtung für das Sammeln des Schmiermittels angeordnet sein, beispielsweise einen Auffangbehälter. Das gezielte Auffangen des ausgetretenem Schmierstoffs erlaubt einen robusten Dichtungsaufbau, der kostengünstig und montagefreundlich ist, keine Gefahr bei Überschmierung birgt und zugleich ein hygienisches Betreiben der Vermahlungsvorrichtung ermöglicht.In order to enable a controlled discharge of the lubricants, a bearing cover of the roller bearing supporting the roller stub can have on its inside a guide channel for lubricant which runs around the roller stub and which is connected to an outlet opening through which lubricant can escape from the guide channel. A collecting device for collecting the lubricant, for example a collecting container, can be arranged below the outlet opening. The targeted collection of the leaked lubricant allows a robust seal structure that is inexpensive and easy to assemble, poses no risk of over-lubrication and at the same time enables hygienic operation of the grinding device.
Um eine homogene Vermahlung über die gesamte Länge der Walzen zu erreichen, werden die Walzen oftmals bombiert. Kann dennoch keine uniforme Mahlarbeit über die gesamte Walzenlänge erreicht werden, kann die Bombierung angepasst werden. Durch Schränken der Walzen, also ein Verkippen der Walzenachsen, ergibt sich zusätzlich zur Spaltverstellung eine Stellgrösse, um die Vermahlung über die Walzenlänge zu beeinflussen und eine gleichmässigere Vermahlung zu erreichen. Hierzu kann vorgesehen sein, dass die erste Walze von zwei ersten Lagerkörpern gehalten wird, die zweite Walze von zwei zweiten Lagerkörpern gehalten wird und die ersten Lagerkörper unabhängig voneinander verstellbar sind und/oder die zweiten Lagerkörper unabhängig voneinander verstellbar sind.
In einer möglichen Ausführungsform kann dies dadurch erreicht werden, dass der zweite Lagerkörper über einen Schwenkbolzen schwenkbar am ersten Lagerkörper abgestützt ist und der Schwenkbolzen relativ zum ersten Lagerkörper verstellbar ist, zum Beispiel in vertikaler Richtung. Dies kann etwa dadurch bewerkstelligt werden, dass der erste Lagerkörper einen Keil aufweist, welcher derart ausgebildet und angeordnet ist, dass eine Verschiebung des Keils in einer ersten Richtung relativ zum ersten Lagerkörper eine Verschiebung des Schwenkbolzens in einer von der ersten Richtung verschiedenen zweiten Richtung relativ zum ersten Lagerkörper bewirkt. Alternativ dazu kann der zweite Lagerkörper aber auch mit Hilfe eines Exzenters relativ zum ersten Lagerkörper verstellbar sein.In order to achieve homogeneous grinding over the entire length of the rollers, the rollers are often cambered. However, if uniform grinding work cannot be achieved over the entire length of the roller, the crowning can be adjusted. By setting the rollers, i.e. tilting the roller axes, In addition to the gap adjustment, there is also a control variable to influence the grinding over the length of the roller and to achieve a more even grinding. For this purpose it can be provided that the first roller is held by two first bearing bodies, the second roller is held by two second bearing bodies and the first bearing bodies can be adjusted independently of one another and / or the second bearing bodies can be adjusted independently of one another.
In one possible embodiment, this can be achieved in that the second bearing body is pivotably supported on the first bearing body via a pivot bolt and the pivot bolt is adjustable relative to the first bearing body, for example in the vertical direction. This can be achieved, for example, in that the first bearing body has a wedge which is designed and arranged in such a way that a displacement of the wedge in a first direction relative to the first bearing body causes a displacement of the pivot pin in a second direction different from the first direction relative to the first bearing body causes. Alternatively, the second bearing body can also be adjustable relative to the first bearing body with the aid of an eccentric.
Die o.g. Walzenpakete sind besonders vorteilhaft im Zusammenhang mit einem wie in der internationalen Patentanmeldung
Gemäß der Erfindung ist eine Vermahlungsvorrich tung, beispielsweise ein Müllereiwalzenstuhl mit den Merkmalen des Anspruchs 1 vorgesehen. Die Vermahlungsvorrichtung enthält einen Maschinenständer und mindestens ein Walzenpaket, das im Maschinenständer eingesetzt oder einsetzbar ist. Hierdurch ergeben sich für die Vermahlungsvorrichtung die bereits oben für das Walzenpaket erläuterten Vorteile.
Wie bereits oben erläutert wurde, ist es zweckmässig, wenn der Maschinenständer eine Spanneinrichtung aufweist und das Walzenpaket eine Kopplungseinrichtung zur lösbaren Kopplung mit der Spanneinrichtung aufweist. Dies erleichtert nämlich die Montage und Demontage des Walzenpakets.
Zum Erzeugen der Vorspannung kann die Spanneinrichtung einen Zylinder aufweisen, der bevorzugt als Balgzylinder ausgeführt ist. Besonders bevorzugt ist es, wenn der Balgzylinder mit einem Entlüftungsventil gekoppelt ist. Hierdurch kann im Überlastfall (beispielsweise beim Eindringen eines Fremdkörpers in den Mahlspalt) eine Entlastung erreicht werden, indem der im Balgzylinder herrschende Druck durch Öffnen des Entlüftungsventils abgebaut wird. Für eine schnelle Entlastung sollte das Entlüftungsventils entsprechend dimensioniert sein.
Zur Vergrösserung der Mahlspalterweiterung im Überlastfall kann die Spanneinrichtung ferner mindestens eine vorgespannte und insbesondere mit dem Zylinder in Reihe geschaltete Feder aufweisen. Die vorgespannte Feder kann etwa ein an sich bekanntes Tellerfederpaket sein.According to the invention, a Mahlungsvorrich device, for example a milling roller mill with the features of claim 1 is provided. The grinding device contains a machine stand and at least one set of rollers which is or can be used in the machine stand. This results in the advantages already explained above for the roller set for the grinding device.
As has already been explained above, it is expedient if the machine frame has a clamping device and the roll set has a coupling device for releasable coupling with the clamping device. This is because this facilitates the assembly and disassembly of the roller set.
To generate the pretension, the tensioning device can have a cylinder, which is preferably designed as a bellows cylinder. It is particularly preferred if the bellows cylinder is coupled to a vent valve. In this way, in the event of an overload (for example when a foreign body penetrates the grinding gap), relief can be achieved by reducing the pressure in the bellows cylinder by opening the vent valve. The vent valve should be dimensioned accordingly for quick relief.
To enlarge the grinding gap enlargement in the event of an overload, the tensioning device can furthermore have at least one pretensioned spring, in particular connected in series with the cylinder. The pretensioned spring can be a well-known disk spring package.
Die Spanneinrichtung kann einen Zuganker, eine an einem ersten Ende des Zugankers schwenkbar gelagerte Zugbuchse, eine in der Zugbuchse teilweise aufgenommene und mittels einer Feder vorgespannte Zugstange sowie den Zylinder enthalten, der mit einem zweiten Ende des Zugankers gekoppelt ist. Die Zugstange kann mit einer am zweiten Lagerkörper angeordnete Kopplungseinrichtung des Walzenpakets koppelbar sein. Der Zuganker kann sich im montierten Zustand des Walzenpakets in einem zwischen seinen Enden befindlichen Abstützpunkt am Lagerkörper abstützen. Durch Aktivieren des Zylinders kann das zweite Ende des Zugankers gegen den ersten Lagerkörper gedrückt und daran abgestützt werden, wodurch das auf das Walzenpaket einwirkende Gesamtdrehmoment reduziert werden kann. Der Zuganker kann um den Abstützpunkt geschwenkt werden und damit an der Zugbuchse und an der Zugstange ziehen. Auf diese Weise können der erste Lagerkörper und der zweite Lagerkörper derart gegeneinander vorgespannt werden, dass die erste Walze und die zweite Walze aufeinander zu gedrückt werden.The tensioning device can contain a tie rod, a tie rod pivotably mounted at a first end of the tie rod, a tie rod partially received in the tie sleeve and pretensioned by means of a spring, and the cylinder which is coupled to a second end of the tie rod. The tie rod can be coupled to a coupling device of the roller set arranged on the second bearing body. In the assembled state of the roller set, the tie rod can be supported in a support point located between its ends on the bearing body. By activating the cylinder, the second end of the tie rod can be pressed against the first bearing body and supported thereon, whereby the total torque acting on the roller set can be reduced. The tie rod can be swiveled around the support point and thus pull on the tension bushing and on the tie rod. In this way, the first bearing body and the second bearing body can be preloaded against one another in such a way that the first roller and the second roller are pressed towards one another.
Es wurde bereits erwähnt, dass beispielsweise zu Revisionszwecken eine oder mehrere Walzen einer Vermahlungsvorrichtung ausgetauscht werden müssen. Die Walzen können nacheinander entnommen werden, oder es kann das gesamte Paket entnommen werden. Die Walzen können an den Mahlflächen, an den Lagerkörpern oder an den Walzenstummeln aufgenommen werden. In der ersten Variante erfolgt ein Anheben durch hydraulische Hubtische und anschliessendes Herausrollen. Bei Aufnahme an den Lagerkörpern werden zunächst Rollen montiert, und anschliessend wird das Walzenpaket durch Herunterstellen der Rollen angehoben und dann auf den Rollen herausgerollt. Zur hängenden Aufnahme an den Walzenstummeln können diese mit Kettenzügen angehoben werden und die Kettenzüge können dann in Schienen verschoben werden. Auch eine liegende Aufnahme an den Walzenstummeln ist möglich, indem Rollen daran befestigt werden und in Schienen verschoben werden. Das Dokument
All diese Methoden weisen jedoch Nachteile auf. Beispielsweise müssen für das Ausrollen in einem Vorbereitungsschritt zunächst die Rollen montiert oder zumindest verstellt werden. Zudem ist das Anheben des Walzenpakets gemäss
Gemäß der Erfindung werden diese Nachteile ausgeräumt durch eine Vermahlungsvorrichtung mit den Merkmalen des Anspruchs 1. Das Walzenpaket weist eine integrierte Rolleinrichtung mit mindestens einer Rolle auf, die derart am Walzenpaket angeordnet oder anordenbar ist, dass das Walzenpaket mit der mindestens einen Rolle auf eine horizontalen Unterlage auflegbar und darauf verfahrbar ist. Weiterhin weist der Maschinenständer mindestens eine Schiene auf, auf der die mindestens eine Rolle des Walzenpakets während der Montage und/oder der Demontage des Walzenpakets verfahrbar ist. Ferner weist das Walzenpaket mindestens eine Kontaktfläche auf, und der Maschinenständer weist mindestens eine Gegenkontaktfläche auf. Die Kontaktfläche und die Gegenkontaktfläche sind derart aufeinander und auf die mindestens eine Schiene abgestimmt, dass die mindestens eine Rolle des Walzenpakets in einer Montageposition des Walzenpakets aufgrund eines Formschlusses zwischen der Kontaktfläche und der Gegenkontaktfläche nicht auf der Schiene aufliegt.
Durch diese erfindungsgemässe Ausbildung wird das Paket bei der Demontage nicht angehoben, sondern auf die Rollen abgesenkt. Zudem liegen die Rollen des Walzenpakets in der Montageposition nicht auf der Schiene auf, was die Rollen schont.According to the invention, these disadvantages are eliminated by a grinding device with the features of claim 1. The roller set has an integrated roller device with at least one roller which is arranged or can be arranged on the roller set in such a way that the roller set with the at least one roller is on a horizontal base can be placed and moved on it. Furthermore, the machine stand has at least one rail on which the at least one roller of the roll set can be moved during the assembly and / or disassembly of the roll set. Furthermore, the roller set has at least one contact surface, and the machine frame has at least one counter-contact surface. The contact surface and the mating contact surface are matched to one another and to the at least one rail in such a way that the at least one roller of the roller set does not rest on the rail in a mounting position of the roller set due to a form fit between the contact surface and the mating contact surface.
With this design according to the invention, the package is not raised during dismantling, but rather is lowered onto the rollers. In addition, the rollers of the roller pack do not rest on the rail in the assembly position, which protects the rollers.
Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels und mehrere Zeichnungen erläutert. Dabei zeigen
- Figur 1:
- ein erfindungsgemässes Walzenpaket in einer ausgerückten Stellung mit einem Teil einer Spanneinrichtung;
- Figur 2:
- das erfindungsgemässe Walzenpaket in einer eingerückten Stellung mit dem Teil der Spanneinrichtung;
- Figur 3a:
- einen erfindungsgemässen Müllereiwalzenstuhl mit zwei erfindungsgemässen Walzenpaketen in einer perspektivischen Ansicht;
- Figur 3b:
- den erfindungsgemässen Müllereiwalzenstuhl in einer Seitenansicht;
- Figur 3c:
- den erfindungsgemässen Müllereiwalzenstuhl in einer Draufsicht;
- Figur 4:
- einen erfindungsgemässen Müllereiwalzenstuhl mit einem erfindungsgemässen Walzenpaket in einer Seitenansicht;
- Figur 5:
- eine Detailansicht eines Handrads und eines Handradgetriebes zur Feineinstellung der Spaltbreite;
- Figur 6:
- eine Detailansicht einer Positionsanzeige zum Anzeigen einer Position des Handrads;
- Figur 7:
- eine Detailansicht zweier Kraftsensoren zur Bestimmung der zwischen den Walzen wirkenden Kraft;
- Figur 8:
- eine Detailansicht des Walzenpakets zur Verstellung der Lagerkörper;
- Figur 9:
- eine Schnittansicht durch ein Wälzlager des Walzenpakets;
- Figur 10:
- eine perspektivische Ansicht des Walzenpakets mit einer Auffangwanne für Schmiermittel;
- Figur 11:
- eine Detailansicht einer Rolleinrichtung des Walzenpakets mit Rollen und Kontaktflächen;
- Figur 12:
- eine Detailansicht des Maschinenständers mit Schienen und Gegenkontaktflächen.
- Figure 1:
- a roll package according to the invention in a disengaged position with part of a tensioning device;
- Figure 2:
- the roll package according to the invention in an engaged position with the part of the tensioning device;
- Figure 3a:
- a milling roller mill according to the invention with two roller packs according to the invention in a perspective view;
- Figure 3b:
- the milling roller mill according to the invention in a side view;
- Figure 3c:
- the milling roller mill according to the invention in a plan view;
- Figure 4:
- a milling roller mill according to the invention with a roller pack according to the invention in a side view;
- Figure 5:
- a detailed view of a handwheel and a handwheel gear for fine adjustment of the gap width;
- Figure 6:
- a detailed view of a position indicator for displaying a position of the handwheel;
- Figure 7:
- a detailed view of two force sensors for determining the force acting between the rollers;
- Figure 8:
- a detailed view of the roller set for adjusting the bearing body;
- Figure 9:
- a sectional view through a roller bearing of the roller pack;
- Figure 10:
- a perspective view of the roller set with a collecting tray for lubricant;
- Figure 11:
- a detailed view of a rolling device of the roller pack with rollers and contact surfaces;
- Figure 12:
- a detailed view of the machine stand with rails and mating contact surfaces.
Die
Der in den
Der erste Lagerkörper 13 verfügt weiterhin über einen ersten, um eine erste Drehachse A1 rotierbaren Anschlagkörper 17 mit einer ersten Anschlagfläche 18. Diese ist durch eine bezüglich der ersten Drehachse A1 exzentrische Umfangsfläche 18 des ersten Anschlagkörpers 17 gebildet. Der zweite Lagerkörper 14 verfügt über einen zweiten, um eine zur ersten Drehachse A1 parallele zweite Drehachse A2 rotierbaren Anschlagkörper 19 mit einer zweiten Anschlagfläche 20. Diese ist durch eine bezüglich der zweiten Drehachse A2 rotationssymmetrische Umfangsfläche 20 des zweiten Anschlagkörpers 19 gebildet. Die beiden Anschlagflächen 18, 20 sind derart ausgebildet und an den Lagerkörpern 13, 14 angeordnet, dass ein Kontakt der Anschlagflächen 18, 20 einem Kontakt der Walzen 11, 12 entgegenwirkt, wie nachfolgend erläutert wird.The
In
Die Lagerung über die Balgzylinder 40 bewirkt eine Überlastsicherung. Um im Überlastfall (beispielsweise beim Eindringen eines Fremdkörpers in den Mahlspalt) eine sofortige Entlastung zu ermöglichen, ist der Balgzylinder mit einem ausreichend dimensionierten Entlüftungsventil gekoppelt, um den im Balgzylinder herrschenden Druck durch Öffnen des Entlüftungsventils schnell abbauen zu können. Ohne Öffnen des Entlüftungsventils ergäbe sich auch ein Kraftanstieg, der aber wesentlich kleiner wäre, als wenn nur ein Federpaket vorhanden wäre.The storage via the
Die in
Um die Breite des Mahlspalts grob einstellen zu können, sind die erste Drehachse A1 des ersten Anschlagkörpers 17 und die zweite Drehachse A2 des zweiten Anschlagkörpers 19 verschiebbar angeordnet, und zwar in einer zu den Drehachsen A1, A2 senkrechten Richtung.In order to be able to roughly set the width of the grinding gap, the first axis of rotation A1 of the
Das Walzenpaket 10 weist weiterhin zur Feineinstellung der Breite des Mahlspalts ein um eine Handraddrehachse H drehbares Handrad 21 auf. Das Handrad 21 ist über ein in
Das Walzenpaket 10 verfügt weiterhin über eine im Detail in
Zur Bestimmung der zwischen den Walzen 11, 12 herrschenden radialen Kräfte umfasst das Walzenpaket 10 eine Kräftemesseinrichtung, die einen ersten Kraftsensor 24 und einen zweiten Kraftsensor 25 enthält. Der erste Kraftsensor 24 ist in der Spanneinrichtung 16 integriert, nämlich im Bereich des zwischen dem Zuganker 51 und der Zugstange 52 gebildeten Gelenks 54; der zweite Kraftsensor 25 befindet sich am zweiten Anschlagkörper 19 (siehe
In
Die
Wie
Claims (13)
- Milling apparatus (70), in particular a mill roll frame (70), comprising a machine stand (71) and at least one roll assembly (10) with a first roll (11) and a second roll (12) that is or can be inserted in the machine stand (71),
wherein the roll assembly has an integrated rolling device (30) having at least one roller (31) which is or can be arranged on the roll assembly (10) in such a way that the roll assembly can be placed onto a horizontal base and moved thereon by means of the at least one roller (31), wherein
the machine stand (71) has at least one rail (72) on which the at least one roller (31) of the roll assembly (10) is movable during mounting and/or demounting of the roll assembly (10), the roll assembly (10) has at least one contact surface (42, 76) and the machine stand (71) has at least one counter-contact surface (73), characterized in that the contact surface (42, 76) and the counter-contact surface (73) are tailored to one another and to the at least one rail (72) in such a way that, in a mounted position of the roll assembly (10), by virtue of at least one form-fitting engagement between the at least one contact surface (42, 76) and the at least one counter-contact surface (73), the at least one roller (31) of the roll assembly (10) does not lie on the rail (72) . - Milling apparatus (70) according to Claim 1,
wherein the first roll (11) is held by at least one first bearing body (13), and the second roll (12) is held by at least one second bearing body (14),
wherein the first bearing body (13) and the second bearing body (14) are adjustable relative to one another in such a way that a milling gap formed between the first roll (11) and the second roll (12) is adjustable,
wherein the first bearing body (13) and the second bearing body (14) can be pretensioned with respect to one another by means of a tensioning device (16) in such a way that the first roll (11) and the second roll (12) are pressed towards one another,
wherein- the first bearing body (13) has at least one first abutment body (17) with a first abutment surface (18), and the second bearing body (14) has at least one second abutment body (19) with a second abutment surface (20),- the abutment surfaces (18, 20) are formed and are or can be arranged on the bearing bodies (13, 14) in such a way that a contact of the abutment surfaces (18, 20) counteracts a contact of the rolls (11, 12),- the first abutment body (17) is rotatable about a first axis of rotation (A1), and the first abutment surface (18) is formed by a circumferential surface (18) of the first abutment body (17) that is eccentric with respect to the first axis of rotation (A1), with the result that the rotational position of the first abutment body (17) determines the minimum width of the milling gap. - Milling apparatus (70) according to Claim 2,
wherein the second abutment body (19) is rotatable about a second axis of rotation (A2) which is parallel to the first axis of rotation (A1), and the second abutment surface (20) is formed by a circumferential surface (20) of the second abutment body (19) that is rotationally symmetrical with respect to the second axis of rotation (A2). - Milling apparatus (70) according to either of Claims 2 and 3,
wherein the first axis of rotation (A1) of the first abutment body (17) and/or the second axis of rotation (A2) of the second abutment body (19) are/is arranged displaceably, in particular in a direction perpendicular to the first axis of rotation (A1). - Milling apparatus (70) according to one of Claims 2 to 4, wherein the roll assembly (10) has a handwheel (21) which can be rotated about a handwheel axis of rotation (H) and which is coupled via a handwheel gear mechanism (22) to the first abutment body (17) in such a way that a rotation of the handwheel (21) causes a rotation of the first abutment body (17).
- Milling apparatus (70) according to one of the Claims 2 to 5,
wherein the roll assembly (10) has a force-measuring device which comprises:- a first sensor (24) for directly or indirectly determining a first force with which the first bearing body (13) and the second bearing body (14) are pretensioned with respect to one another;- a second sensor (25) for directly or indirectly determining a second force with acts between the first abutment body (17) and the second abutment body (19). - Milling apparatus (70) according to one of the preceding claims, wherein the roll assembly (10) comprises a handwheel (21) which is rotatable about a handwheel axis of rotation (H) and by means of which a milling gap formed between the first roll (11) and the second roll (12) can be set, wherein the roll assembly (10) has a position indicator (26) for indicating a position of the handwheel (21), and the position indicator (26) comprises a position indicator housing (27) and an indicator element (28) which is movable along the handwheel axis of rotation (H) relative to the position indicator housing (27) and which is or can be pretensioned by means of a position indicator spring (29) in the direction of the handwheel axis of rotation (H) with respect to the position indicator housing (27) in such a way that it can be rotated about the handwheel axis of rotation (H) only upon overcoming the pretensioning brought about by the position indicator spring (29).
- Milling apparatus (70) according to Claim 7, wherein the roll assembly (10) has an integrated rolling device (30) having at least one roller (31) which is or can be arranged on the roll assembly (10) in such a way that the roll assembly (10) can be placed onto a horizontal base and moved thereon by means of the at least one roller (31) .
- Milling apparatus (70) according to Claim 7 or 8, wherein at least one of the bearing bodies (13, 14) has a rolling bearing (58) which supports a roll stub (33) of one of the rolls (11, 12), wherein a bearing cover (63) of the rolling bearing (58) has on its inner side (34) a guide channel (35) for lubricant that extends around the roll stub (33) and is connected to an outlet opening (36) through which lubricant can exit the guide channel (35).
- Milling apparatus (70) according to one of the Claims 7 to 9, wherein the first roll (11) is held by two first bearing bodies (13), the second roll (12) is held by two second bearing bodies (14), and the first bearing bodies (13) are adjustable independently of one another and/or the second bearing bodies (14) are adjustable independently of one another.
- Milling apparatus (70) according to one of the preceding claims, wherein the machine stand (71) has a tensioning device (16), and the roll assembly (10) has a coupling device (66) which is arranged in particular on the second bearing body (14) and intended for releasably coupling the roll assembly (10) to the tensioning device (16).
- Milling apparatus (70) according to Claim 11, wherein the tensioning device (16) has a cylinder (40), in particular a bellows cylinder (40).
- Milling apparatus (70) according to Claim 11 or 12, wherein the tensioning device (16) has at least one pretensioned spring (41) which is in particular connected in series with the cylinder (40) .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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ES19184071T ES2831502T3 (en) | 2018-05-28 | 2018-05-28 | Crushing device |
EP19184071.9A EP3597301B1 (en) | 2018-05-28 | 2018-05-28 | Milling device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18174570.4A EP3575001B3 (en) | 2018-05-28 | 2018-05-28 | Roller packages for milling devices, milling devices and method |
EP19184071.9A EP3597301B1 (en) | 2018-05-28 | 2018-05-28 | Milling device |
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EP18174570.4A Division-Into EP3575001B3 (en) | 2018-05-28 | 2018-05-28 | Roller packages for milling devices, milling devices and method |
EP18174570.4A Division EP3575001B3 (en) | 2018-05-28 | 2018-05-28 | Roller packages for milling devices, milling devices and method |
Publications (2)
Publication Number | Publication Date |
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EP3597301A1 EP3597301A1 (en) | 2020-01-22 |
EP3597301B1 true EP3597301B1 (en) | 2020-10-07 |
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EP19184069.3A Active EP3597300B1 (en) | 2018-05-28 | 2018-05-28 | Rolling packets for milling devices, milling devices and method |
EP19184071.9A Active EP3597301B1 (en) | 2018-05-28 | 2018-05-28 | Milling device |
EP18174570.4A Active EP3575001B3 (en) | 2018-05-28 | 2018-05-28 | Roller packages for milling devices, milling devices and method |
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EP19184069.3A Active EP3597300B1 (en) | 2018-05-28 | 2018-05-28 | Rolling packets for milling devices, milling devices and method |
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US (3) | US11266993B2 (en) |
EP (3) | EP3597300B1 (en) |
JP (3) | JP6974634B2 (en) |
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CN (3) | CN112423888B (en) |
AU (3) | AU2019275986B2 (en) |
BR (1) | BR112020023619B1 (en) |
CA (3) | CA3189974A1 (en) |
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ES2829098T7 (en) * | 2018-05-28 | 2023-01-16 | Buehler Ag | Roll packs for crushing devices, crushing devices and method |
CN111729723A (en) * | 2020-07-02 | 2020-10-02 | 江西金穗丰糖业有限公司 | A raw materials processingequipment for maltose preparation |
CN112169969B (en) * | 2020-08-06 | 2021-10-22 | 宁化县腾丰香料厂 | Double-layer type crushing device for production of biomass pellet fuel raw materials |
EP4000734A1 (en) | 2020-11-20 | 2022-05-25 | Bühler AG | Roller mill with improved product collection |
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