Claims
- 1. A roll arrangement comprising:
a deflection controlled roll; a counter roll, said counter roll and said deflection controlled roll being arranged to form at least one nip; said deflection controlled roll comprising a rotating roll jacket, a carrier axially passing through said roll jacket, and support elements arranged between said roll jacket and said carrier; and a plurality of said support elements, located at a nip side of said deflection controlled roll, being structured and controllable so that at least some of said plurality of support elements assume a position retracted from said roll jacket during a start-up operation of said deflection controlled roll.
- 2. The roll arrangement in accordance with claim 1, wherein the start-up operation occurs with an open nip.
- 3. The roll arrangement in accordance with claim 1, wherein said deflection controlled roll comprises a self-adjusting deflection controlled roll, and said carrier comprises a rotationally fixed carrier.
- 4. The roll arrangement in accordance with claim 1, further comprising a vibration damped auxiliary drive associated with at least said deflection controlled roll.
- 5. The roll arrangement in accordance with claim 4, wherein said vibration damped auxiliary drive comprises a belt drive.
- 6. The roll arrangement in accordance with claim 1, wherein a majority of said plurality of support elements at said nip side assumes a position retracted from said roll jacket during the start-up operation.
- 7. The roll arrangement in accordance with claim 1, wherein all of said plurality of support elements at said nip side assume a position retracted from said roll jacket during the start-up operation.
- 8. The roll arrangement in accordance with claim 1, wherein said at least some support elements, which assume said retracted position from said roll jacket during the start-up operation, are positionable to contact said roll jacket upon said deflection controlled roll reaching an operating speed.
- 9. The roll arrangement in accordance with claim 1, wherein said plurality of support elements, which assume said retracted position from said roll jacket during the start-up operation, are positionable to contact said roll jacket upon a closing of said nip.
- 10. The roll arrangement in accordance with claim 1, wherein said plurality of support elements are structured and arranged to be resiliently loaded in said retracted position.
- 11. The roll arrangement in accordance with claim 10, further comprising conical springs, such that each of said plurality of support elements are structured and arranged to be loaded into said retracted positions by said conical springs.
- 12. The roll arrangement in accordance with claim 11, wherein said conical springs are formed to assume an at least substantially flat spiral shape in a loaded state.
- 13. The roll arrangement in accordance with claim 1, further comprising a spring structured and arranged to load one of said plurality of support elements into said retracted position, wherein said spring is arranged inside said one support element.
- 14. The roll arrangement in accordance with claim 13, further comprising a bolt that is fixed to said carrier and is arranged to extend into said one support element, said bolt comprising an abutment positioned on a free end of said bolt, wherein said spring is supported at said abutment.
- 15. The roll arrangement in accordance with claim 1, wherein an oil temperature control device arranged to control an oil temperature in such a manner that the oil temperature during the start-up operation is higher than after the start-up operation.
- 16. The roll arrangement in accordance with claim 1, wherein an oil flow device arranged to change a volume flow of oil depending on whether or not said deflection controlled roll is in the start-up operation.
- 17. The roll arrangement in accordance with claim 1, further comprising a pressure loading device arranged to move said plurality of support elements into contact with said roll jacket.
- 18. The roll arrangement in accordance with claim 17, wherein said at least some support elements are pressure free during the start-up operation.
- 19. The roll arrangement in accordance with claim 17, wherein said plurality of support elements are pressure free during the start-up operation.
- 20. The roll arrangement in accordance with claim 1, structured and arranged to form a multi-roll calender.
- 21. A deflection controlled roll comprising:
a rotating roll jacket; a carrier arranged to axially pass through said roll jacket; support elements arranged between said roll jacket and said carrier, wherein said support elements are least partly resiliently loaded into a position retracted from said roll jacket.
- 22. The deflection controlled roll in accordance with claim 21, structured and arranged to form a roll arrangement.
- 23. The deflection controlled roll in accordance with claim 21, said deflection controlled roll being arranged as a self-adjusting deflection controlled roll.
- 24. The deflection controlled roll in accordance with claim 21, further comprising conical springs arranged to load each of said support elements into said retracted position.
- 25. The deflection controlled roll in accordance with claim 24, wherein said conical springs are structured to assume an at least substantially flat spiral shape in a loaded state.
- 26. The roll arrangement in accordance with claim 21, further comprising a spring structured and arranged to load one of said plurality of support elements into said retracted position, wherein said spring is arranged inside said one support element.
- 27. The roll arrangement in accordance with claim 26, further comprising a bolt that is fixed to said carrier and is arranged to extend into said one support element, said bolt comprising an abutment positioned on a free end of said bolt, wherein said spring is supported at said abutment.
- 28. The roll arrangement in accordance with claim 21, further comprising springs structured and arranged to load each of said plurality of support elements into said retracted positions, wherein said springs are arranged inside each support element.
- 29. The roll arrangement in accordance with claim 28, further comprising bolts that are fixed to said carrier and are arranged to extend into each support element, said bolts comprising abutments positioned on free ends of said bolts, wherein said springs are supported at said abutments.
- 30. A process of operating a roll arrangement that includes a deflection controlled roll and a counter roll arranged to form at least one nip, said process comprising:
positioning support elements of the deflection controlled roll arranged at a nip side of the deflection controlled roll in a position retracted from a roll jacket of the deflection controlled roll; and accelerating the deflection controlled roll to an operating speed.
- 31. The process in accordance with claim 30, further comprising maintaining the nip in an open position during the accelerating of the deflection controlled roll to operating speed.
- 32. The process in accordance with claim 30, further comprising closing the nip upon attaining operating speed of the deflection controlled roll.
- 33. The process in accordance with claim 30, further comprising moving the support elements from the retracted position into contact with the roll jacket upon attaining operating speed of the deflection roll.
- 34. The process in accordance with claim 30, further comprising moving the support elements from the retracted position into contact with the roll jacket, whereby the nip is closed.
- 35. The process in accordance with claim 30, further comprising driving at least the deflection controlled roll with a vibration damped auxiliary drive.
- 36. The process in accordance with claim 35, wherein the vibration damped auxiliary drive comprises a belt drive.
Priority Claims (1)
Number |
Date |
Country |
Kind |
102 10 357.7 |
Mar 2002 |
DE |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority under 35 U.S.C. §119 of German Patent Application No. 102 10 357.7, filed Mar. 8, 2002, the disclosure of which is expressly incorporated by reference herein in its entirety.