Deflection controlled roll

Abstract

Deflection controlled roll that includes a rotating roll jacket, a rotationally fixed yoke arranged to axially pass through the roll jacket, and at least one hydrostatic support element arranged on the yoke to exert a supporting force on an inner side of the roll jacket. The at least one hydrostatic support element includes a pressure space, a hydrostatic pocket, and at least one restrictor or capillary coupled to the at least one hydrostatic pocket. The pressure space is structured and arranged to receive pressure fluid to charge the at least one hydrostatic support element, and the at least one restrictor or capillary is structured and arranged to convey pressure fluid to the at least one hydrostatic pocket. The pressure space and the at least one hydrostatic pocket are structured and arranged to be separately supplied with pressure fluid.

1 . A deflection controlled roll comprising: 
 a rotating roll jacket;    a rotationally fixed yoke arranged to axially pass through said roll jacket;    at least one hydrostatic support element is arranged on said yoke to exert a supporting force on an inner side of said roll jacket;    said at least one hydrostatic support element comprising a pressure space, a hydrostatic pocket, and at least one pre-restrictor coupled to said at least one hydrostatic pocket;    said pressure space is structured and arranged to receive pressure fluid to charge said at least one hydrostatic support element; and    said at least one pre-restrictor being structured and arranged to convey pressure fluid at a constant fluid pressure to said at least one hydrostatic pocket.    
   
   
       2 . The deflection controlled roll in accordance with  claim 1 , wherein said at least one hydrostatic support element comprises a piston in cylinder unit.  
   
   
       3 . The deflection controlled roll in accordance with  claim 1 , wherein said pre-restrictor is located within said at least one hydrostatic support element.  
   
   
       4 . The deflection controlled roll in accordance with  claim 1 , wherein an end of said pre-restrictor remote from said at least one hydrostatic pocket is coupled to a passage separate from said pressure space.  
   
   
       5 . The deflection controlled roll in accordance with  claim 4 , wherein said passage is structured and arranged to conducting pressure fluid at a constant pressure.  
   
   
       6 . The deflection controlled roll in accordance with  claim 1 , wherein said at least one hydrostatic pocket comprises a plurality of hydrostatic pockets and each of said plurality of hydrostatic pockets is coupled to a pre-restrictor to be charged with a constant fluid pressure.  
   
   
       7 . The deflection controlled roll in accordance with  claim 1 , wherein said at least one hydrostatic support element comprises a plurality of support elements arranged in series on said yoke in a direction of a roll axis.  
   
   
       8 . The deflection controlled roll in accordance with  claim 7 , wherein said at least one hydrostatic pocket of each of said plurality of support elements are supplied with pressure fluid at a constant fluid pressure separately from said pressure space.  
   
   
       9 . The deflection controlled roll in accordance with  claim 1 , wherein said pressure fluid supplied to said at least one hydrostatic pocket is pressure oil.  
   
   
       10 . A process of operating a deflection controlled roll that includes a rotating roll jacket, a rotationally fixed yoke arranged to axially pass through said roll jacket, and at least one hydrostatic support element is arranged on said yoke to exert a supporting force on an inner side of the roll jacket, the at least one hydrostatic support element including a pressure space, a hydrostatic pocket, and at least one pre-restrictor coupled to the at least one hydrostatic pocket, said process comprising: 
 supplying a pressure fluid to the pressure space to charge the at least one hydrostatic support element; and    supplying a pressure fluid at a constant fluid pressure to the at least one hydrostatic pocket through the at least one pre-restrictor.    
   
   
       11 . The process in accordance with  claim 10 , wherein the pressure fluid to the at least one pre-restrictor is supplied separately from the pressure fluid to the pressure space.  
   
   
       12 . A deflection controlled roll comprising: 
 a rotating roll jacket;    a rotationally fixed yoke arranged to axially pass through said roll jacket;    a plurality of hydrostatic support elements arranged on said yoke and exerting a supporting force on an inner side of said roll jacket;    each hydrostatic support element comprising a piston, a pressure space arranged beneath the piston, hydrostatic pockets arranged on an upper end of the piston, and at least one pre-restrictor arranged within the piston and coupled to one of said hydrostatic pockets;    each pressure space being structured and arranged to receive a first volume of pressure fluid; and    each at least one pre-restrictor being structured and arranged to convey a second volume of pressure fluid at a constant fluid pressure to the one of said hydrostatic pockets,    wherein the first volume and the second volume are supplied separately.    
   
   
       13 . The deflection controlled roll in accordance with  claim 12 , wherein said plurality of hydrostatic support elements are arranged in series on said yoke in a direction of a roll axis.  
   
   
       14 . The deflection controlled roll in accordance with  claim 12 , wherein said pressure fluid supplied to said hydrostatic pockets is pressure oil.  
   
   
       15 . A process of operating the deflection controlled roll of  claim 12 , said process comprising: 
 supplying the first volume of pressure fluid to the pressure spaces to charge the hydrostatic support elements; and    supplying the second volume of pressure fluid separately from the first volume and at a constant fluid pressure to the hydrostatic pockets via each at least one pre-restrictors.