WO2014206416A1 - High speed roller press - Google Patents
High speed roller press Download PDFInfo
- Publication number
- WO2014206416A1 WO2014206416A1 PCT/DK2014/050185 DK2014050185W WO2014206416A1 WO 2014206416 A1 WO2014206416 A1 WO 2014206416A1 DK 2014050185 W DK2014050185 W DK 2014050185W WO 2014206416 A1 WO2014206416 A1 WO 2014206416A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- high speed
- roller press
- torsional vibration
- speed roller
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
- B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
-
- 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
- B02C4/28—Details
Definitions
- the present invention relates to a high speed roller press comprising two oppositely rotating rollers, each comprising a roller shaft, and which are driven by means of a drive system.
- High speed roller presses are known inter alia from international patent application No. WO 92/00141 .
- the drive system of a high speed roller press may comprise two motors which drive separate rollers, either directly or via separate gear units.
- it may comprise one motor used either for driving one roller directly or for driving one or both rollers via a gear unit.
- the drive system often includes a safety coupling. For variability of the roller gap width, power to one or both rollers may be transmitted through a cardan shaft.
- the operation of high speed roller presses may entail operational problems manifested by torsional vibrations of the rollers. This may result in substantial torque variations in the drive system and, as a consequence hereof, overloading of the gear unit or cut-out of the safety coupling or main motor. This tendency seems to increase with an increase in the roller peripheral velocity, and, therefore, it is often a limiting factor for the roller peripheral velocity with which a high speed roller press can be operated. Further, this tendency seems to increase with fineness of the ground material and the force applied for pressing the rollers against each other. Thus, several operating parameters seem limiting in enhancing the capacity of a high speed roller press without causing damaging vibrations.
- a high speed roller press which can be driven within a broader range of the operating parameters, such as the roller peripheral velocity, material fineness, pressing force etc. without generating any undesirable torsional vibrations in the drive system.
- This is achieved by means of a high speed roller press of the kind mentioned in the introduction, and being characterized in that it comprises a torsional vibration reducing element, which is connected to the roller shaft. It will thus be possible to operate the high speed roller press with an increased production capacity either by increasing the roller peripheral velocity or the applied pressing force or both without entailing damaging torsional vibrations. This is due to the fact that the torsional vibrations, which are generated during operation of the high speed roller press, are reduced.
- the torsional vibration reducing element may be constituted of any suitable element, which reduces the torsional vibrations.
- the torsional vibration reducing element is a torsional vibration damper, preferably a viscous vibration damper.
- the high speed roller press may advantageously comprise a torsional vibration reducing element for each roller shaft.
- the torsional vibration reducing element may in principle be connected to the roller shaft anywhere over its length, however it is preferred that it is connected to the roller shaft where the vibration amplitude is biggest. Tests have indicated that the vibration amplitude is biggest close to the roller, and it is therefore preferred that the torsional vibration reducing element is connected to the roller shaft adjacent to the roller.
- the high speed roller press according to the invention can be utilized in connection with grinding of particulate material, such as cement raw materials, cement clinker and similar materials.
- the roller shafts are supported by bearings arranged on both sides of the rollers and the at least one torsional vibration- reducing element is arranged between the rollers and the bearings adjacent to the roller such that the damping is done between the bearing and the roller. In this way it is possible to arrange the torsional vibration-reducing element right next to the roller.
- the roller shafts are supported by bearings arranged on both sides of the rollers and wherein the at least one torsional vibration-reducing element is arranged in close fit with at least one of the bearings adjacent to the roller. Arranging the torsional vibration-reducing element in close fit with one of the bearings provides a very compact design where the dampening o occurs as close to the roller as possible.
- a high speed roller press comprising two rollers 1 and 2, each having a roller shaft 3, 4 and being supported by bearings 5.
- One or both rollers are via each their roller shaft 3, 4 connected to a drive system, not shown, which typically comprises a motor and possibly a gear unit and a safety coupling.
- the high speed roller press comprises a 5 torsional vibration reducing element 6, which is connected to the roller shaft 3. In this way the torsional vibrations, which are generated during operation of the high speed roller press, are reduced.
- the torsional vibration reducing element 6 is a viscous o torsional vibration damper, which is placed in close vicinity to the respective roller 1 .
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
High speed roller press comprising two oppositely rotating rollers (1, 2) each comprising a roller shaft (3, 4), and which are driven by means of a drive system. The high speed roller press comprises a torsional vibration reducing element (6) which is connected to the roller shaft (3, 4).
Description
High speed roller press
The present invention relates to a high speed roller press comprising two oppositely rotating rollers, each comprising a roller shaft, and which are driven by means of a drive system.
High speed roller presses are known inter alia from international patent application No. WO 92/00141 . There are many different configuration options for the drive system of a high speed roller press. In one embodiment it may comprise two motors which drive separate rollers, either directly or via separate gear units. In a second embodiment it may comprise one motor used either for driving one roller directly or for driving one or both rollers via a gear unit. Also the drive system often includes a safety coupling. For variability of the roller gap width, power to one or both rollers may be transmitted through a cardan shaft.
Sometimes, the operation of high speed roller presses may entail operational problems manifested by torsional vibrations of the rollers. This may result in substantial torque variations in the drive system and, as a consequence hereof, overloading of the gear unit or cut-out of the safety coupling or main motor. This tendency seems to increase with an increase in the roller peripheral velocity, and, therefore, it is often a limiting factor for the roller peripheral velocity with which a high speed roller press can be operated. Further, this tendency seems to increase with fineness of the ground material and the force applied for pressing the rollers against each other. Thus, several operating parameters seem limiting in enhancing the capacity of a high speed roller press without causing damaging vibrations.
Therefore, it is the objective of the present invention to provide a high speed roller press which can be driven within a broader range of the operating parameters, such as the roller peripheral velocity, material fineness, pressing force etc. without generating any undesirable torsional vibrations in the drive system.
This is achieved by means of a high speed roller press of the kind mentioned in the introduction, and being characterized in that it comprises a torsional vibration reducing element, which is connected to the roller shaft. It will thus be possible to operate the high speed roller press with an increased production capacity either by increasing the roller peripheral velocity or the applied pressing force or both without entailing damaging torsional vibrations. This is due to the fact that the torsional vibrations, which are generated during operation of the high speed roller press, are reduced.
In principle, the torsional vibration reducing element may be constituted of any suitable element, which reduces the torsional vibrations. However, it is preferred that the torsional vibration reducing element is a torsional vibration damper, preferably a viscous vibration damper.
In situations where both rollers of the high speed roller press are directly driven via each their roller shaft, the high speed roller press may advantageously comprise a torsional vibration reducing element for each roller shaft. The torsional vibration reducing element may in principle be connected to the roller shaft anywhere over its length, however it is preferred that it is connected to the roller shaft where the vibration amplitude is biggest. Tests have indicated that the vibration amplitude is biggest close to the roller, and it is therefore preferred that the torsional vibration reducing element is connected to the roller shaft adjacent to the roller.
The high speed roller press according to the invention can be utilized in connection with grinding of particulate material, such as cement raw materials, cement clinker and similar materials.
In an embodiment of the invention, the roller shafts are supported by bearings arranged on both sides of the rollers and the at least one torsional vibration- reducing element is arranged between the rollers and the bearings adjacent to the
roller such that the damping is done between the bearing and the roller. In this way it is possible to arrange the torsional vibration-reducing element right next to the roller.
5 In another embodiment of the invention, the roller shafts are supported by bearings arranged on both sides of the rollers and wherein the at least one torsional vibration-reducing element is arranged in close fit with at least one of the bearings adjacent to the roller. Arranging the torsional vibration-reducing element in close fit with one of the bearings provides a very compact design where the dampening o occurs as close to the roller as possible.
The invention will now be explained in further details with reference to the drawing, being diagrammatical, and with its only figure showing a top view of a high speed roller press.
5
In the figure is seen a high speed roller press comprising two rollers 1 and 2, each having a roller shaft 3, 4 and being supported by bearings 5. One or both rollers are via each their roller shaft 3, 4 connected to a drive system, not shown, which typically comprises a motor and possibly a gear unit and a safety coupling.
0
Thus, in order to be able to operate the high speed roller press with an increased production capacity either by increasing the roller peripheral velocity or the applied pressing force or both without entailing damaging torsional vibrations, it is suggested according to the invention the high speed roller press comprises a 5 torsional vibration reducing element 6, which is connected to the roller shaft 3. In this way the torsional vibrations, which are generated during operation of the high speed roller press, are reduced.
In the shown embodiment, the torsional vibration reducing element 6 is a viscous o torsional vibration damper, which is placed in close vicinity to the respective roller 1 .
Claims
1. A high speed roller press comprising two rotating rollers (1 , 2) arranged opposite each other and said rotating rollers (1 ,2) comprising roller shafts (3, 4) having a
5 longitudinal extension in an axial direction, said high speed roller press furthermore comprising at least one torsional vibration reducing element (6) connected to at least one of the roller shafts (3, 4) in a position adjacent to the rotating rollers (1 , 2) in the axial direction preferably in a position adjacent to the rotating rollers (1 , 2) where a vibration amplitude of the roller shafts (3, 4) is0 biggest.
2. A high speed roller press according to claim 1 characterized in that the torsional vibration reducing element (6) is a torsional vibration damper, preferably a viscous vibration damper.
5
3. A high speed roller press according to claim 1 , characterized in that the high speed roller press comprises a torsional vibration reducing element (6) for each roller shaft (3, 4). 0 4. A high speed roller press according to claim 1 , characterized in that the torsional vibration-reducing element (6) is connected to the roller shaft (3,
4) adjacent to the roller (1 , 2).
5. A high speed roller press according to claim 1 , characterized in that the roller 5 shafts (3, 4) are supported by bearings (5) arranged on both sides of the rollers and wherein the at least one torsional vibration-reducing element (6) is arranged between the rollers (1 , 2) and the bearings (5) adjacent to the roller (1 , 2).
6. A high speed roller press according to claim 1 , characterized in that the roller o shafts (3, 4) are supported by bearings (5) arranged on both sides of the rollers and wherein the at least one torsional vibration-reducing element (6) is arranged in close fit with at least one of the bearings (5) adjacent to the roller (1 , 2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201370345 | 2013-06-24 | ||
| DKPA201370345 | 2013-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014206416A1 true WO2014206416A1 (en) | 2014-12-31 |
Family
ID=51022711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DK2014/050185 WO2014206416A1 (en) | 2013-06-24 | 2014-06-24 | High speed roller press |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2014206416A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013741A (en) * | 2019-12-26 | 2020-04-17 | 涡阳县晟丰新型建材有限公司 | Roller for fly ash brick wheel mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086340A1 (en) * | 2001-04-19 | 2002-10-31 | Erno Keskinen | Apparatus for controlling vibration of rotating rolls |
| WO2003000424A1 (en) * | 2001-06-22 | 2003-01-03 | F.L. Smidth A/S | Roller mill for grinding of particulate material |
| US20100225121A1 (en) * | 2009-02-11 | 2010-09-09 | Converteam Technology Ltd. | Rotating Electrical Machines |
| US20110272512A1 (en) * | 2009-01-30 | 2011-11-10 | Flsmidth A/S | Roller Mill |
-
2014
- 2014-06-24 WO PCT/DK2014/050185 patent/WO2014206416A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086340A1 (en) * | 2001-04-19 | 2002-10-31 | Erno Keskinen | Apparatus for controlling vibration of rotating rolls |
| WO2003000424A1 (en) * | 2001-06-22 | 2003-01-03 | F.L. Smidth A/S | Roller mill for grinding of particulate material |
| US20110272512A1 (en) * | 2009-01-30 | 2011-11-10 | Flsmidth A/S | Roller Mill |
| US20100225121A1 (en) * | 2009-02-11 | 2010-09-09 | Converteam Technology Ltd. | Rotating Electrical Machines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111013741A (en) * | 2019-12-26 | 2020-04-17 | 涡阳县晟丰新型建材有限公司 | Roller for fly ash brick wheel mill |
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