Constructive design and arrangement of a dissipator for suppressing vibrations in a roll stand

Abstract

A dissipator includes a hydraulic inductor, a hydraulic resistor and a hydraulic capacitor for damping vibrations in a roll stand for producing flat metal rolled material. The dissipator has an intermediate piece with a first hydraulic interface for directly hydraulically-mechanically linking to an adjusting cylinder of the roll stand. Via a second hydraulic interface, a valve block with a control valve for the adjusting cylinder can be directly hydraulically-mechanically linked to the dissipator. The intermediate piece can be formed as a rigid block, to which the hydraulic resistor and the hydraulic capacitor are detachably fluidically connected. The hydraulic inductor is introduced into the block, preferably in the form of a tubular cavity and fluidically connected to the first and second hydraulic interfaces.

1 - 9 . (canceled) 
     
     
         10 . A dissipator for damping vibrations in a roll stand for producing flat metallic rolled material, comprising:
 a hydraulic inductor;   a hydraulic resistor; and   a hydraulic capacitor;   wherein the dissipator has a frequency-dependent damping effect that is tuned to a characteristic vibration frequency of the roll stand;   wherein the dissipator has an intermediate piece configured to be fluidically arranged between an adjusting cylinder of the roll stand and a valve block having a control valve assigned to the adjusting cylinder;   wherein the intermediate piece has a first hydraulic interface for direct hydraulic-mechanical linking of the dissipator to the adjusting cylinder; and   wherein the intermediate piece has a second hydraulic interface for hydraulic linking of the valve block to the dissipator.   
     
     
         11 . The dissipator as claimed in  claim 10 , wherein the second hydraulic interface provides direct hydraulic-mechanical linking of the valve block to the dissipator. 
     
     
         12 . The dissipator as claimed in  claim 10 , wherein the hydraulic resistor comprises an adjustable valve. 
     
     
         13 . The dissipator as claimed in  claim 10 , wherein:
 the dissipator has a design frequency in a range of 70 Hz to 130 Hz;   the hydraulic resistor comprises a valve having a maximum flow rate of 300 liters per minute and a maximum differential pressure of 5 bar;   the hydraulic inductor comprises a tubular cavity with a length of 600 mm to 800 mm and a largest diameter of 50 mm to 65 mm; and   the hydraulic capacitor comprises a pressure vessel having a maximum pressure of 300 bar with a hydraulic volume of 10 to 20 liters.   
     
     
         14 . The dissipator as claimed in  claim 13 , wherein the hydraulic capacitor further comprises:
 a further pressure vessel directly hydraulically-mechanically linked to the hydraulic capacitor; and   a clampable adjusting device configured to set a further hydraulic volume of the further pressure vessel to a value between 0% and 30% of the hydraulic volume of the pressure vessel.   
     
     
         15 . The dissipator as claimed in  claim 10 , wherein:
 the intermediate piece comprises a rigid block, the hydraulic resistor and the hydraulic capacitor being detachably fluidically connected to the rigid block;   the hydraulic inductor is fluidically connected to the hydraulic resistor or to the hydraulic capacitor so that the hydraulic inductor, the hydraulic resistor, and the hydraulic capacitor are fluidically coupled to one another in series; and   the hydraulic inductor is made in the intermediate piece as a tubular cavity and is fluidically connected to the first and second hydraulic interfaces.   
     
     
         16 . The dissipator as claimed in  claim 15 , wherein the hydraulic resistor is a cartridge valve configured to deflect a conducted flow of hydraulic liquid at a right angle and to connect the hydraulic inductor fluidically to the hydraulic capacitor. 
     
     
         17 . The dissipator as claimed in  claim 16 , wherein the cartridge valve comprises an infinitely variable proportional valve with a controllable opening position between 0 and 100% of a maximum opening position and is configured to report the set opening position. 
     
     
         18 . The dissipator as claimed in  claim 15 , wherein the dissipator comprises a cover cap mechanically detachable from the intermediate piece, the cover cap configured to delimit the hydraulic inductor at one end.