CA1111675A - Device for protecting rolling-mill bearings from overloading - Google Patents
Device for protecting rolling-mill bearings from overloadingInfo
- Publication number
- CA1111675A CA1111675A CA331,527A CA331527A CA1111675A CA 1111675 A CA1111675 A CA 1111675A CA 331527 A CA331527 A CA 331527A CA 1111675 A CA1111675 A CA 1111675A
- Authority
- CA
- Canada
- Prior art keywords
- piston
- roll
- bearing housing
- cylinder unit
- bearing
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
- B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
Abstract
ABSTRACT OF THE DISCLOSURE
A device for protecting rolling-mill bearings from overloading, especially roller-briquette-presses having a driven and an idler roll, the improvement comprising adaptation of one of the two bearing housings to yield axially in the frame of the machine.
A device for protecting rolling-mill bearings from overloading, especially roller-briquette-presses having a driven and an idler roll, the improvement comprising adaptation of one of the two bearing housings to yield axially in the frame of the machine.
Description
--`\
The invention relates to a device for protecting rolling-mill or the like bearin~s from overloading. Especially roller-briquette-presses having a driven and a idler roll.
It is known that the rolls in rolling mills, especially roller-briquette-presses, are subjected during operation to con-siderable thermal stressing, leading to changes in the length of the roll. These thrust forces, acting in the axial direction of the rolls must be absorbed by the roll-bearings, and must be compensated for by movement of the outer rings in the bearing housing. The resulting additional load on the bearings frequently reduces the life thereof by up to about 50%. Furthermore, the high bearing loads, occurring more particularly during the operation of roller-briquette-presses, make it necessary to use self-aligning bearings with undivided cages which, as compared with roll-bearings with divided cage-housings, are less able to withstand axial thrust.
~- It is the purpose of the present invention to provide a device which reliably eliminates overloading of rolling-mill bearings by axial thrust forces arising while the rolls are in operation. This purpose is achieved in that one of the two bearing housings of the roll is adapted to yield in the axial direction. As a result of this axial yielding o-f one of the two bearing housings, it is possible to compensate for all axial thrust forces, arising while the rolling-mill is in operation, by movement of the bearing housing in the fxame of the rnachine.
This substantially increases the life of the bearing.
According to one configuration of the invention, the bearing housing of the idler-roll, which is adapted to yie'd axially, is connected to the piston-rod of a single-acting hydraulic piston-cylinder unit. Movement of the beariny housing in the .
- axial direction of the roll may be very simply compensated for, by the said single-acting piston-cylinder unit, by setting the piston-rod and piston at a slight angle to the cylinder. At the sarne time, the hydraulic piston-cylinder unit may take over and measure the pressure of the idler roll against the driven roll.
According to another configuration of the invention, the bearing housing is adapted to move axially in a support. In the case of the idlex roll, this support is connected to a double-acting piston-cylinder unit. This is a very advantageous way of mounting the bearing housing hydrostatically in the support, thus allowing it to move axially without friction. Furthermore, the double-acting piston-cylinder unit may be used very advantage-ously to adjust, and maintain constant, both the width of the gapbetween the pressure rolls and the pressure of the idler roll against the driven roll.
In accordance with one aspect of the present invention, there is provided an apParatuS for protectiny bearinqs in rolling mills, rnore particularly in roller-briquette-presses, from overloading, the said apparatus comprising a driven and an idler roll, and at least one of the bearing-housings thereof being arranged to yield in the axial direction, characterized in that at least the bearing housing which ~ields in the axial direction is equipped with self-aligning bearings and cornrnunicates with a hydraulic piston cylinder unit, the piston thereof being fitted with a seal permitting deflection of the piston rod at an angle to the longitudinal axis of the piston.
Further details, characteristics and advantages of the invention may be gathered from the ex~nples of embodirnent des-cribed hereinafter in greater detail, in conjunction with the drawings attached hereto. The invention is therefore illustrated by way of exarnple in the accornpanying drawings wherein:
Figure 1 is a side elevation of a roller-briquette-press havlng a single-acting hydraulic piston-cylinder unit arranyed at the bearing housing of the idler roll, according to the invention;
The invention relates to a device for protecting rolling-mill or the like bearin~s from overloading. Especially roller-briquette-presses having a driven and a idler roll.
It is known that the rolls in rolling mills, especially roller-briquette-presses, are subjected during operation to con-siderable thermal stressing, leading to changes in the length of the roll. These thrust forces, acting in the axial direction of the rolls must be absorbed by the roll-bearings, and must be compensated for by movement of the outer rings in the bearing housing. The resulting additional load on the bearings frequently reduces the life thereof by up to about 50%. Furthermore, the high bearing loads, occurring more particularly during the operation of roller-briquette-presses, make it necessary to use self-aligning bearings with undivided cages which, as compared with roll-bearings with divided cage-housings, are less able to withstand axial thrust.
~- It is the purpose of the present invention to provide a device which reliably eliminates overloading of rolling-mill bearings by axial thrust forces arising while the rolls are in operation. This purpose is achieved in that one of the two bearing housings of the roll is adapted to yield in the axial direction. As a result of this axial yielding o-f one of the two bearing housings, it is possible to compensate for all axial thrust forces, arising while the rolling-mill is in operation, by movement of the bearing housing in the fxame of the rnachine.
This substantially increases the life of the bearing.
According to one configuration of the invention, the bearing housing of the idler-roll, which is adapted to yie'd axially, is connected to the piston-rod of a single-acting hydraulic piston-cylinder unit. Movement of the beariny housing in the .
- axial direction of the roll may be very simply compensated for, by the said single-acting piston-cylinder unit, by setting the piston-rod and piston at a slight angle to the cylinder. At the sarne time, the hydraulic piston-cylinder unit may take over and measure the pressure of the idler roll against the driven roll.
According to another configuration of the invention, the bearing housing is adapted to move axially in a support. In the case of the idlex roll, this support is connected to a double-acting piston-cylinder unit. This is a very advantageous way of mounting the bearing housing hydrostatically in the support, thus allowing it to move axially without friction. Furthermore, the double-acting piston-cylinder unit may be used very advantage-ously to adjust, and maintain constant, both the width of the gapbetween the pressure rolls and the pressure of the idler roll against the driven roll.
In accordance with one aspect of the present invention, there is provided an apParatuS for protectiny bearinqs in rolling mills, rnore particularly in roller-briquette-presses, from overloading, the said apparatus comprising a driven and an idler roll, and at least one of the bearing-housings thereof being arranged to yield in the axial direction, characterized in that at least the bearing housing which ~ields in the axial direction is equipped with self-aligning bearings and cornrnunicates with a hydraulic piston cylinder unit, the piston thereof being fitted with a seal permitting deflection of the piston rod at an angle to the longitudinal axis of the piston.
Further details, characteristics and advantages of the invention may be gathered from the ex~nples of embodirnent des-cribed hereinafter in greater detail, in conjunction with the drawings attached hereto. The invention is therefore illustrated by way of exarnple in the accornpanying drawings wherein:
Figure 1 is a side elevation of a roller-briquette-press havlng a single-acting hydraulic piston-cylinder unit arranyed at the bearing housing of the idler roll, according to the invention;
-2-Figure 2 is a plan view of the bearing housing with the single-acting piston-cylinder unit, partly in section, Figure 3 is a side elevation of a rolling mill, with a double-acting plston-cyl.inder unit engaging with the idler-roll bearing support.
As shown in Figure 1, the roller-briquette-press com-prises a driven roll 1 and an idler roll 2. Sha~ts 3, 4, arr-anged at the ends of rolls 1, 2 are mounted, as shown in Figure 2, in self-aligning roller bearings 5 arranged, in turn, in bearing housings 6, 7. According to the invention, one of these bearing housings is displaceable axially in machine-frame 8. Bearing housing 7, associated with idler roll 2, is connected to piston-'' , ~.
,~1 -2a-.
- \
rod 9 of a single-acting hydraulic piston-cylinder unit 10.
Piston 11 of this unit is fitted with a special seal which very advantageously allows piston-rod 9, engaging with bearing housing 7 to deflect through a specific angle c~ .
In the event of changes in the length of the roll, as a result of heating during operation, this very advantageously allows the bearing housing to move away, thus avoiding additional axial loads on self-aligning roller bearings 5. The seal on piston 11, together with the cylinder of piston-cylinder unit 10, acts as a kind of articulation, allowing piston-rod 9, with bearing housing 7, to deflect through an angle ~ , without any leakage occurring in the said hydraulic unit. Self-aligning roller bearing 5 also acts as an articulation permitting angular movement of shaft 4 in relation to bearing housing 7. In short, this is a highly advantageous manner of absorbing the changes in length, and axial thrust associated therewith, produced, while the roller-briquette-press is in operation, by heating of the roll and/or shaft.
Bearing housing 6, which has no piston-cylinder unit, may also be provided with a mounting adapted to yield in the axial direction, the said mounting being in the form of an articula-tion or appropriate resilient material. In this way, the bearings of the rolling mills, and especially those of roller-briquette-presses, are reliably protected, according to the invention, from one-sided loading or overloading, the life of the said bearings being thus substantially extended~ At the same time, piston-~ylinder unit 10 may be used, very advantageously, as a means for pressing idler roll 2 against driven roll 1.
Moreover, as shown in ~'igure 3, bearing housings 12, 13 for rolls 14, 15 may also be adapted, very advantageously, to move axially in supports 16, 17. Supports 16, arranged at each end of driven roll 14, are secured to machine frame 1~, whereas supports 17 for idler roll 15 are adapted to slide in machine-frame 18 toward~ driven roll 14. The sliding axial guidance of bearing houses 12, 13 in supports 16, 17 allow the roller bearings and bearing housings to move very easily in the axial direction, whenever axial thrusts occur in opera~ion. In this case, an almos~ frictionless hydrostatic mounting of bearing housings 12, 13 in supports 16, 17 is an advantage.
Adjustment of the width of the gap between the rolls, and of the necessary roll-pressure, is achieved by means of a double-acting piston-cylinder unit 19, piston-rod 20 of which engages with support 17. The arrangement illustrated in Figure 3 of bearing housings 12, 13 in supports 16, 17 reliably protects roll-bearings 14, 15 from over-loading, thus providing a sub-stantial increase in bearing life in comparison with hitherto-lcnown arrangements. In addition to this, the use of a double-acting piston-cylinder unit permits different pressures on eac~
side of the piston to be set and kept constant. In this way, the inherent radial frequencies of the crusher rolls, arising, for example, in a smooth-roll cr~sher, may be very advantageously increased, thus protecting the pressure surface from uneven wear (corrugations). This also improves, very advantageously, the damping action of the cylinder of the double-acting piston-cylinder ùnit.
As shown in Figure 1, the roller-briquette-press com-prises a driven roll 1 and an idler roll 2. Sha~ts 3, 4, arr-anged at the ends of rolls 1, 2 are mounted, as shown in Figure 2, in self-aligning roller bearings 5 arranged, in turn, in bearing housings 6, 7. According to the invention, one of these bearing housings is displaceable axially in machine-frame 8. Bearing housing 7, associated with idler roll 2, is connected to piston-'' , ~.
,~1 -2a-.
- \
rod 9 of a single-acting hydraulic piston-cylinder unit 10.
Piston 11 of this unit is fitted with a special seal which very advantageously allows piston-rod 9, engaging with bearing housing 7 to deflect through a specific angle c~ .
In the event of changes in the length of the roll, as a result of heating during operation, this very advantageously allows the bearing housing to move away, thus avoiding additional axial loads on self-aligning roller bearings 5. The seal on piston 11, together with the cylinder of piston-cylinder unit 10, acts as a kind of articulation, allowing piston-rod 9, with bearing housing 7, to deflect through an angle ~ , without any leakage occurring in the said hydraulic unit. Self-aligning roller bearing 5 also acts as an articulation permitting angular movement of shaft 4 in relation to bearing housing 7. In short, this is a highly advantageous manner of absorbing the changes in length, and axial thrust associated therewith, produced, while the roller-briquette-press is in operation, by heating of the roll and/or shaft.
Bearing housing 6, which has no piston-cylinder unit, may also be provided with a mounting adapted to yield in the axial direction, the said mounting being in the form of an articula-tion or appropriate resilient material. In this way, the bearings of the rolling mills, and especially those of roller-briquette-presses, are reliably protected, according to the invention, from one-sided loading or overloading, the life of the said bearings being thus substantially extended~ At the same time, piston-~ylinder unit 10 may be used, very advantageously, as a means for pressing idler roll 2 against driven roll 1.
Moreover, as shown in ~'igure 3, bearing housings 12, 13 for rolls 14, 15 may also be adapted, very advantageously, to move axially in supports 16, 17. Supports 16, arranged at each end of driven roll 14, are secured to machine frame 1~, whereas supports 17 for idler roll 15 are adapted to slide in machine-frame 18 toward~ driven roll 14. The sliding axial guidance of bearing houses 12, 13 in supports 16, 17 allow the roller bearings and bearing housings to move very easily in the axial direction, whenever axial thrusts occur in opera~ion. In this case, an almos~ frictionless hydrostatic mounting of bearing housings 12, 13 in supports 16, 17 is an advantage.
Adjustment of the width of the gap between the rolls, and of the necessary roll-pressure, is achieved by means of a double-acting piston-cylinder unit 19, piston-rod 20 of which engages with support 17. The arrangement illustrated in Figure 3 of bearing housings 12, 13 in supports 16, 17 reliably protects roll-bearings 14, 15 from over-loading, thus providing a sub-stantial increase in bearing life in comparison with hitherto-lcnown arrangements. In addition to this, the use of a double-acting piston-cylinder unit permits different pressures on eac~
side of the piston to be set and kept constant. In this way, the inherent radial frequencies of the crusher rolls, arising, for example, in a smooth-roll cr~sher, may be very advantageously increased, thus protecting the pressure surface from uneven wear (corrugations). This also improves, very advantageously, the damping action of the cylinder of the double-acting piston-cylinder ùnit.
Claims (3)
1. An apparatus for protecting bearings in rolling mills, more particularly in roller-briquette-presses, from overloading, the said apparatus comprising a driven and an idler roll, and at least one of the bearing-housings thereof being arranged to yield in the axial direction, characterized in that at least the bearing housing which yields in the axial direction is equipped with self-aligning bearings and com-municates with a hydraulic piston cylinder unit, the piston thereof being fitted with a seal permitting deflection of the piston rod at an angle to the longitudinal axis of the piston.
2. An apparatus according to claim 1, characterized in that the bearing housing of the idler roll communicates with the piston rod of a single acting hydraulic piston cylinder unit.
3. An apparatus according to claim 2, characterized in that the bearing housing of the idler roll communicates with the piston rod of a double acting hydraulic piston cylinder unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2831249.4 | 1978-07-15 | ||
| DE19782831249 DE2831249A1 (en) | 1978-07-15 | 1978-07-15 | Briquette press roller bearing thrust protector - has loose roller with flexible thrust bearing connected to hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111675A true CA1111675A (en) | 1981-11-03 |
Family
ID=6044543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA331,527A Expired CA1111675A (en) | 1978-07-15 | 1979-07-10 | Device for protecting rolling-mill bearings from overloading |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1111675A (en) |
| DD (1) | DD145127A5 (en) |
| DE (1) | DE2831249A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3635885A1 (en) * | 1986-10-22 | 1988-05-05 | Kloeckner Humboldt Deutz Ag | Rolling mill, especially a roller press |
| DK175920B1 (en) * | 1990-10-08 | 2005-06-27 | Deutz Ag | Roller bearing in a two-roller rolling apparatus |
| DE4034822C2 (en) * | 1990-10-08 | 1999-02-25 | Deutz Ag | Roller bearing of a two-roller machine |
| DE4234481A1 (en) * | 1992-10-13 | 1994-04-14 | Krupp Polysius Ag | Roller mill for crashing brittle material with - has two high pressure rollers and machine frame has two swivelable clamping frames at both roller sides with tensile anchors |
| DE102010038197B4 (en) * | 2010-10-14 | 2012-08-30 | Thyssenkrupp Polysius Ag | Roller mill for shredding brittle regrind |
| CN106564212B (en) * | 2016-11-15 | 2019-01-01 | 长沙新气象自动化技术有限公司 | Fluorite pellet processes drying integral machine |
| CN106553374A (en) * | 2016-11-15 | 2017-04-05 | 长沙新气象自动化技术有限公司 | A kind of pressure adaptive ball press |
-
1978
- 1978-07-15 DE DE19782831249 patent/DE2831249A1/en not_active Withdrawn
-
1979
- 1979-07-10 CA CA331,527A patent/CA1111675A/en not_active Expired
- 1979-07-12 DD DD21429579A patent/DD145127A5/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DD145127A5 (en) | 1980-11-19 |
| DE2831249A1 (en) | 1980-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |