EP3256258A1 - Entraînement de broyeur vertical - Google Patents
Entraînement de broyeur verticalInfo
- Publication number
- EP3256258A1 EP3256258A1 EP16703490.9A EP16703490A EP3256258A1 EP 3256258 A1 EP3256258 A1 EP 3256258A1 EP 16703490 A EP16703490 A EP 16703490A EP 3256258 A1 EP3256258 A1 EP 3256258A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- axis
- pinion
- output shaft
- drive unit
- 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.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 51
- 238000010168 coupling process Methods 0.000 claims abstract description 51
- 238000005859 coupling reaction Methods 0.000 claims abstract description 51
- 238000005096 rolling process Methods 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/006—Ring or disc drive gear arrangement
Definitions
- the present invention relates to a drive device for a vertical roller mill, Vertical Roller Mill type (VRM). More specifically, the invention relates to a drive device of the type comprising: a main housing; an output ring gear, fixed or adapted to be fixed on a rotary grinding table of the vertical roller mill, said output ring gear being rotatable relative to the main support, about a first vertical axis; at least one drive pinion meshing or able to mesh with the output ring gear, the or each drive pinion being rotatable about a second axis; and at least one drive unit, each drive unit being adapted to drive a drive gear in rotation, the or each drive unit comprising a motor and an output shaft, the output shaft being movable in rotation around a third axis.
- VRM Vertical Roller Mill type
- VRM mills are used in the cement industry to grind clinker, coal and also for the preparation of raw materials.
- a mill comprising a drive device of the aforementioned type is described in particular in document US7926754.
- the present invention aims to provide a device ensuring optimum positioning of the drive pinion or gears with respect to the output ring gear, without requiring fastidious adjustments in the positioning of the drive unit associated with said pinion.
- the device must be economical in terms of its manufacture and maintenance.
- the subject of the invention is a drive device of the aforementioned type, in which: the drive device comprises for each drive pinion a secondary casing fixed to the main casing, so that the first and second axes are fixedly positioned relative to each other; and the or each driving gear is connected to the output shaft of the drive unit associated with this drive gear by a coupling device such as the second and third axes. are substantially aligned, said coupling device having at least one degree of freedom allowing misalignment between the second and third axes when transmitting rotation of the output shaft to the drive gear.
- the drive device comprises one or more of the following characteristics, taken separately or according to all the possible technical combinations:
- the coupling device allows a maximum radial misalignment between the second axis and the third axis of at least 0.1 mm, and preferably at least 0.5 mm or at least 1 mm, during the transmitting rotation of the output shaft (36) to the drive sprocket; and / or the coupling device allows a maximum angular misalignment between the second axis and the third axis of at least 0.1 °, and preferably at least 0.5 ° mm or at least 1 °, when transmitting rotation of the output shaft to the drive sprocket;
- the or each drive unit comprises: a single motor; and a number of output trees greater than or equal to one and less than or equal to two;
- At least one of the one or more drive units is adapted to drive a single drive gear in rotation, said drive unit comprising a single output shaft rotatable about the third axis;
- At least one of the one or more drive units is adapted to drive in rotation exactly two drive gears, said drive unit comprising exactly two output shafts rotatable respectively about the third axis and a fourth axis; parallel to said third axis;
- the coupling device is provided with means for measuring a torsion torque between the output shaft of the drive unit and the drive pinion;
- the coupling device is provided with breaking means in case of application of a torsion torque greater than a predetermined threshold
- the coupling device comprises a disengaging system for reversibly disengaging the drive gear and the output shaft of the drive unit;
- the drive device comprises a plurality of drive gears and a drive unit for each of the drive gears, said drive gears and drive units being distributed angularly around the first axis;
- the motor of the drive unit is a rotary motor of vertical axis, or in which the motor of the drive unit is a rotary motor of horizontal axis.
- the coupling device is provided with means for adjusting its torsional rigidity.
- the invention also relates to a vertical roller mill, comprising a grinding table and grinding rollers able to roll on the table, said grinder comprising a drive device as defined above, the ring gear of output of said drive device being attached to the grinding table.
- FIG. 1 shows a schematic sectional view of a drive device according to a first embodiment of the invention
- FIG. 2 is a diagrammatic sectional view of a driving device according to a second embodiment of the invention
- Figure 3 shows a schematic perspective view of a driving device according to a third embodiment of the invention.
- the driving device 10 of Figure 1, the driving device 1 10 of Figure 2 and the driving device 210 of Figure 3 are part of a vertical roller mill (not shown) comprising a table grinding and mill rollers.
- the rollers are able to roll on the table to crush material to be milled, such as clinker, coal or ore, as described in US7926754.
- the driving device 10, 1 10 comprises a main casing 12 preferably placed on and fixed to a housing support 13.
- the main casing 12 defines a first vertical axis 14.
- the main housing 12 preferably has a shape of revolution relative to the first axis 14.
- the housing support 13 comprises for example a cylindrical wall and a base plate, or amounts.
- the housing support 13 is placed on a base 15, for example the floor of a room receiving the vertical roller mill.
- the main housing 12 serves to support a rotary plate 16, fixed to the grinding table of the vertical roller mill.
- the turntable 16 is rotatable about the first axis 14 relative to the main housing 12.
- the drive device 10, 1 10, 210 also comprises a ring gear 18, integral with the turntable 16.
- the ring gear 18 is external toothing as shown in Figures 1, 2 and 3.
- the ring gear is internally toothing.
- the ring gear 18 is spur or helical.
- the driving device 10, 1 10, 210 also comprises a driving pinion 20, 220.
- the driving pinion 20, 220 is fixed on a pinion shaft 21, 221.
- the driving gear 20, 220 is fixed on a pinion shaft 21, 221 without any degree of freedom, nor in rotation.
- the pinion 20, 220 is not freely mounted in tilting on the pinion shaft 21, 221.
- the or each drive gear 20, 220 is adapted to mesh with the ring gear 18.
- the device 10, 1 10, 210 comprises a plurality of drive gears, in particular a first drive pinion 20 and a second pinion gear. 220, as shown in FIG. 3.
- the drive device 10, 1 10, 210 comprises between two and twelve drive gears 20, 220.
- the drive gears 20, 220 are distributed angularly. in a regular manner around the output ring gear 18.
- the ring gear 18 and the turntable 16 are mounted fixed relative to the main casing 12 in directions radial with respect to the first axis 14. In other words, especially during operation, the ring gear 18 and the output rotating plate 16 are prevented from moving radially relative to the axis 14. Similarly, the ring gear 18 and the turntable 16 are fixed in rotation about two axes of rotation extending perpendicularly to each other. other and perpendicular to the first axis. In other words, especially during operation, the ring gear 18 and the turntable 16 are prevented from tilting about a center of rotation disposed on the first axis 14. The only degree of freedom of the ring gear of output 18 and the turntable 16 is rotated about the first axis 14.
- the drive pinion 20, 220, or each drive gear 20, 220 is housed in a single secondary housing, or housing 22, 122.
- the or each drive gear 20, 220 is rotatable in its housing secondary 22, 122 relative to a second axis 24, 224.
- the secondary housing is not shown in Figure 3.
- the driving gear 20, 220 is fixedly housed in the secondary casing 22, 122, guided solely by means of bearings, without the need to adjust its radial position with respect to its axis of rotation 24.
- the drive pinion 20, 220, or each drive gear 20, 220 is fixedly mounted relative to the secondary casing 22, 122 in directions radial with respect to the second axis 24, 224. In other words, in particular during the In operation, the drive gear 20, 220, or each drive gear 20, 220, is prevented from moving radially relative to the second axis 24, 224.
- the drive gear 20, 220, or each drive pinion 20, 220 is fixed in rotation about two axes of rotation extending perpendicularly to each other and perpendicular to the second axis 24, 224.
- the drive gear 20, 220, or each drive pinion 20, 220 is prevented from tilting about a center of rotation disposed on the second axis 24, 224.
- the only degree of freedom of the drive pinion 20, 220, or of each drive gear 20, 220 relative to the associated secondary casing 22, 122 is thus rotated about the second axis 24.
- the secondary housing 22, 122 is integral with the main housing 12.
- the second axis 24, 224 of rotation of the drive gear 20 is fixedly positioned relative to the first axis 14 of rotation of the ring gear 18.
- the secondary housing 22 of the drive device 10 is removably attached to the main housing 12, so that it can be disassembled.
- the secondary housing 122 of the drive device 1 10 is permanently attached to the main housing 12, or the secondary housing 122 is integral with the main housing 12.
- the housing secondary 22 may be permanently attached to the main housing 12, and the secondary housing 122 of the driver 1 10 may be removably attached to the main housing 12.
- the drive pinion 20, 220, or each drive pinion 20, 220, is associated with a drive unit 26, 226 able to rotate said drive pinion.
- the drive unit 26, 226 is fixed to the base 15.
- the drive unit 26, 226 comprises a rotary motor 28 having a motor shaft 29.
- the axis of rotation 30 of the motor shaft 29 is vertical, parallel to the second axis 24 of rotation of the drive gear 20.
- the axis of rotation 130 of the motor shaft 29 is horizontal, perpendicular to the second axis 24, 224 of rotation of the drive sprocket 20, 220.
- the drive unit 26, 226 comprises a gearbox 32, 132, 232.
- the gearbox 32, 132, 232 comprises an input shaft 34, at least one output shaft 36 and a gearbox housing 37.
- the gear units 32 and 132 of FIGS. 1 and 2 comprise a single input shaft 34 and a single output shaft 36.
- the gear unit 232 of FIG. 3 comprises a single input shaft 34, a first output shaft 36 and a second output shaft 236.
- the input shaft 34 and the output shaft or shafts 36, 236 are rotatably mounted on the gear housing.
- the input shaft 34 and the output shaft or shafts 36, 236 have no other degree of freedom with respect to the gear housing 37, especially during operation.
- the input shaft 34 is connected to the motor shaft 29 by a first coupling 38, without the intermediary of a reduction stage.
- the input shaft 34 of the reducer 32 is arranged vertically. In the embodiments of Figure 2, the input shaft 34 of the gearbox 132, 232 is disposed horizontally.
- the input shaft 34 is oriented upwards and the motor 28 is positioned above the gearbox 32. In a variant, the input shaft is oriented downwards and the motor is positioned below the speed reducer.
- the shaft or the first output shaft 36 of the speed reducer 32, 132, 232 is disposed along a third vertical axis 40 of rotation.
- the drive pinion 20, and more particularly the pinion shaft 21, is connected to the output shaft 36 by a second coupling 42.
- This second coupling 42 transmits a rotation of the output shaft 36 to the shaft pinion 21 and thus the drive gear 20.
- the output shaft 36 is connected to the pinion shaft 21 by the second coupling 42 without the intermediary of a reduction stage.
- the output shaft 36 is positioned under the drive pinion 20.
- the second coupling 42 is configured such that the second axis 24 and the third axis 40 are substantially aligned.
- the second coupling 42 has at least one degree of freedom allowing a radial and / or angular misalignment between the second axis 24 and the third axis 40 during rotation.
- the maximum radial misalignment between the second axis 24 and the third axis 40 accepted by the second coupling 42, during the transmission of the rotation of the output shaft 36 to the drive pinion 20, is at least 0.1 mm, more preferably at least 0.5 mm, more preferably at least 1 mm.
- the maximum angular misalignment between the second axis 24 and the third axis 40 accepted by the second coupling 42, during the transmission of the rotation of the output shaft 36 to the drive pinion 20, is at least 0.1 °, more preferably at least 0.5 °, still more preferably at least 1 °.
- a coupling which can be used as a second coupling 42 and which permits the misalignment required by the device 10, 1 10 is known as such from the state of the art.
- This is for example a universal joint type coupling, a spring coupling, a gear coupling or an elastic coupling comprising springs or a rubber portion.
- the second coupling 42 is provided with means for adjusting its torsional stiffness.
- the second coupling 42 is for example a coupling, in particular with teeth, equipped with a first torsion shaft whose torsional stiffness is less important than the torsional stiffness of the pinion shaft 21 and the output shaft.
- the dynamic behavior of the connection between the output shaft 36 and the pinion shaft 21 is influenced by the torsion shaft.
- first torsion shaft can be exchanged by a second torsion shaft whose torsional stiffness is different from that of the first torsion shaft.
- the section and the length of each torsion shaft are selected and adjusted to change its stiffness.
- the second coupling 42 is capable of breaking when a torque greater than a predetermined threshold is applied, between the output shaft 36 and the pinion shaft 21 or the drive pinion 20.
- the second coupling 42 is equipped with means for measuring the torsional torque between the shaft 36 and the driving pinion 20.
- These torsional torque measuring means comprise, for example, strain gauges.
- the second coupling 42 is equipped with a disengaging system.
- the drive pinion 20 can be reversibly decoupled from the output shaft 36.
- the second drive pinion 220 is disposed adjacent to the first drive pinion 20 around the output ring gear 18.
- the second output shaft 236 of the speed reducer 232 is disposed in a fourth vertical axis 240 of rotation parallel to the third axis 40.
- the second drive gear 220, and more particularly its pinion shaft 221 is connected to the second output shaft 236 by a third coupling 242, without the intermediary of a reduction stage.
- the second output shaft 236 is positioned under the second drive gear 220.
- the above description concerning the second coupling 42 also applies to the third coupling 242.
- the second and third couplings 42, 242 of the device 210 are substantially identical.
- the drive unit 26 as shown in FIGS. 1 and 2 is designed to drive a single driving pinion 20 in rotation with the aid of its motor 28.
- the drive unit 226 as shown in FIG. 3 is provided for rotating exactly two drive gears 20, 220 with its single motor 28.
- the drive device comprises at least one drive unit 26 associated with a single drive gear 20, as well as at least one drive unit 226 associated with a pair of drive gears. 20, 220.
- the drive pinion 20, 220 or each drive gear 20, 220 meshes with the ring gear 18, and the second pin 24, 224 is positioned relative to the first axis 14 so that the meshing stresses are located below a certain threshold.
- the housing 22 is fixed to the housing 12, for example by screwing.
- the drive pinion 20 is installed in the housing 122 integral with the housing 12.
- the drive unit 26, 226 or each drive unit 26, 226 is positioned relative to the main housing 12.
- the main housing 12 and the drive unit 26, 226 are fixed to the foundation 15, in positions defined with respect to each other, so as to minimize the constraints of transmission of the movements between the motor 28 and the ring gear 18.
- the shaft or each output shaft 36, 236 of the or each drive unit 26, 226 is connected to the drive pinion 20 or to each drive pinion 20, 220 associated, by means of a second or third coupling 42, 242 as previously described.
- the degree of freedom of the second or third coupling 42, 242 make it possible to compensate for an uncertainty in the alignment of the axis 24, 224 of the drive pinion 20, 220 and the axis 40, 240 of the shaft 36, 236, during the installation of the main housing 12 and the drive unit 26, 226 on the base 15.
- the degree of freedom of the second or third coupling 42, 242 also make it possible to manufacture the housing of the drive pinion 20 in the secondary housing or the housing of the output shaft 36 in the gearbox card 37 with significant tolerances, without this leads to the generation of constraints.
- the second or third coupling 42, 242 is then adjusted with respect to its dynamic behavior, replacing the first torsion shaft with a second torsion shaft.
- the motor (s) 28 are operated, which rotates the output shaft 36 of the or each drive unit 26.
- the shaft 36 rotates the drive pinion 20.
- Said pinion drive 20 or each drive gear 20 meshes with the ring gear 18, driving said ring gear 18, and the turntable 16, in rotation along the first axis 14.
- the various motors 28 can be put into operation one after the other in order to progressively increase the power supplied to the drive. ring gear 18 at the start.
- a second disengageable coupling 42 also facilitates maintenance operations on the drive pinion 20 and / or on the drive unit 26.
- the second coupling 42 is provided with means for adjusting its torsional stiffness, it is possible to adjust its stiffness to modify the torsion modes depending on the kinematic chain, the motor and the mill. These modifications can be made upstream of the manufacture or after the commissioning of the equipment.
- the second coupling 42 is capable of breaking when a torque greater than a predetermined threshold is applied, the second coupling 42 acts as a "fuse" while avoiding the breakage of another part, more expensive or less easy to change.
- a drive device according to a not shown embodiment comprises a removable gear housing 22 and a drive unit 26 with a motor 130 horizontal axis.
- An operating method similar to that described above applies to the device 210 of FIG.
- the second or third coupling 42, 242 takes up the misalignment between the drive pinion 20, 220 and the output shaft 36, 236.
- the assembly and manufacture of the gearbox 32, 132 can therefore take place with large tolerances.
- a large number of drive gears 20, 220 can be mounted on the main housing 12 at a predetermined position, without requiring fastidious adjustments of the position of the drive units 26, 226 associated with each of the gears.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Gear Transmission (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1551071A FR3032359B1 (fr) | 2015-02-10 | 2015-02-10 | Entrainement de broyeur vertical |
PCT/EP2016/052248 WO2016128269A1 (fr) | 2015-02-10 | 2016-02-03 | Entraînement de broyeur vertical |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3256258A1 true EP3256258A1 (fr) | 2017-12-20 |
EP3256258B1 EP3256258B1 (fr) | 2022-06-22 |
Family
ID=52779935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16703490.9A Active EP3256258B1 (fr) | 2015-02-10 | 2016-02-03 | Entraînement de broyeur vertical |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3256258B1 (fr) |
DK (1) | DK3256258T3 (fr) |
FR (1) | FR3032359B1 (fr) |
WO (1) | WO2016128269A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2687045A (en) * | 1952-02-18 | 1954-08-24 | Falk Corp | Power transmission |
US4210291A (en) * | 1978-07-10 | 1980-07-01 | Erste Osterreichische Zahnraderfabrick Rudolf Kienast Gesellschaft m.b.H. | Roller mill |
DE102006050205B4 (de) | 2006-10-25 | 2013-03-21 | Gebr. Pfeiffer Ag | Sicherheitssystem für Wälzmühlen |
DE102007017755A1 (de) * | 2007-04-16 | 2008-10-23 | Loesche Gmbh | Drehzahlvariables Mühlengetriebe |
CN105377438B (zh) * | 2013-07-08 | 2019-05-07 | Fl史密斯公司 | 重型驱动装置和粉碎机 |
-
2015
- 2015-02-10 FR FR1551071A patent/FR3032359B1/fr active Active
-
2016
- 2016-02-03 DK DK16703490.9T patent/DK3256258T3/da active
- 2016-02-03 WO PCT/EP2016/052248 patent/WO2016128269A1/fr active Application Filing
- 2016-02-03 EP EP16703490.9A patent/EP3256258B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3032359A1 (fr) | 2016-08-12 |
WO2016128269A1 (fr) | 2016-08-18 |
EP3256258B1 (fr) | 2022-06-22 |
DK3256258T3 (da) | 2022-07-04 |
FR3032359B1 (fr) | 2017-03-31 |
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