Sliding ring for a radial piston pump, and device for the installation thereof

Abstract

The sliding ring ( 1 ) for a radial piston pump has an inner ring ( 2 ) and a coaxial outer ring ( 3 ) between which a spring/damping element ( 5 ) is arranged. The spring/damping element ( 5 ) is in one piece and comprises on both sides an annular rim bead ( 8 ). The rim beads rest at the side rim of the inner ring ( 2 ) against the latter's outer circumference and at the rim of the outer ring ( 3 ) against the latter's inner circumference. Provided between the rim beads ( 8 ) is a connecting structure ( 9 ) that is constituted, for example, by at least one further damping ring ( 10 ) that is connected via webs ( 11 ) to the rim beads ( 8 ). By way of a corresponding configuration of the spring/damping element ( 5 ), chambers ( 32 ) into which a liquid can be introduced can additionally be formed between the inner ring ( 2 ) and outer ring ( 3 ) so that the stiffness of the sliding ring ( 1 ) can be variably configured.

1 . A sliding ring ( 1 ) for a radial piston pump, having an inner ring ( 2 ) and a coaxial outer ring ( 3 ) between which a spring/damping element ( 5 ) is arranged, wherein the spring/damping element ( 5 ) is in one piece and comprises on both sides a respective annular rim bead ( 8 ) that rests at the side rim of the inner ring ( 2 ) against the latter's outer circumference and at the rim of the outer ring ( 3 ) against the latter's inner circumference; and a connecting structure ( 9 ) is provided between the rim beads ( 8 ).  
     
     
         2 . The sliding ring as defined in  claim 1 , wherein the connecting structure ( 9 ) comprises at least one further bead ( 10 ), resting against the outer circumference of the inner ring ( 2 ) and the inner circumference of the outer ring ( 3 ), that is connected to the rim beads ( 8 ).  
     
     
         3 . The sliding ring as defined in  claim 1  or  2 , wherein the sliding ring ( 1 ) is substantially an arrangement made up of multiple parallel beads ( 8 , 10 ) located next to one another and connected to one another.  
     
     
         4 . The sliding ring as defined in one of the foregoing claims, wherein the beads ( 8 , 10 ) are connected to one another by webs ( 11 ).  
     
     
         5 . The sliding ring as defined in  claim 4 , wherein the webs ( 11 ) extend substantially along the entire lateral circumference of the beads ( 8 , 10 ).  
     
     
         6 . The sliding ring as defined in  claim 4 , wherein the webs ( 11 ) extend along only a portion of the lateral circumference of the beads ( 8 , 10 ).  
     
     
         7 . The sliding ring as defined in one of claims  4  through  6 , wherein the webs ( 11 ) are configured as preset breaking points that break during operation of the sliding ring.  
     
     
         8 . The sliding ring as defined in one of the foregoing claims, wherein the beads ( 8 , 10 ) are damping rings having a circular cross section.  
     
     
         9 . The sliding ring as defined in one of claims  1  through  7 , wherein the beads ( 8 , 10 ) comprise a basic body and sealing lips, continuous therewith, that rest against the outer ring ( 3 ) and/or inner ring ( 2 ).  
     
     
         10 . The sliding ring as defined in  claim 1 , wherein the rim beads ( 8 ) rest in liquid-tight fashion against the inner ring ( 2 ) and outer ring ( 3 ), and are connected to one another via transverse webs ( 31 ) that rest against the inner ring ( 2 ) and/or outer ring ( 3 ), so that along the outer circumference of the spring/damping element ( 5 ) between the rim beads ( 8 ), a plurality of chambers ( 32 ) separated by the transverse webs ( 31 ) are created between the inner ring ( 2 ) and outer ring ( 3 ).  
     
     
         11 . The damping ring as defined in  claim 10 , wherein the chambers ( 32 ) each have at least one inflow opening ( 33 , 38 ) for a liquid; and at least one of said inflow openings ( 33 ) is provided in the circumferential wall of the inner ring ( 2 ).  
     
     
         12 . The damping ring as defined in  claim 10  or  11 , wherein the transverse webs ( 31 ) are equipped with passthrough openings ( 38 ) so that each two adjacent chambers ( 32 ) are thereby connected.  
     
     
         13 . The sliding ring as defined in  claim 11  or  12 , wherein the inflow openings ( 33 ) in the wall of the inner ring ( 2 ) can be connected to a liquid source.  
     
     
         14 . The sliding ring as defined in one of claims  10  through  13 , wherein the transverse webs ( 31 ) are configured as bulkheads that are arranged on the inner ring ( 2 ) and/or outer ring ( 3 ).  
     
     
         15 . The sliding ring as defined in one of claims  10  through  14 , wherein the transverse webs can be retracted into and/or extended out of the inner ring ( 2 ) and/or outer ring ( 3 ).  
     
     
         16 . A device for placing an annular spring/damping element onto an inner ring ( 2 ) of a sliding ring, the inner ring having on its side rims circumferential shoulders ( 4 ) that hold the spring/damping element ( 5 ) in place, characterized by the following features: 
 a cylindrical tube ( 22 ) that has an outside diameter approximately corresponding to that of the inner ring ( 2 ) and onto which the spring/damping element ( 5 ) can be slid;    an installation taper ( 23 ) that is continuous with the cylindrical tube ( 22 ), widens conically, and can be placed onto a shoulder ( 4 ) of the inner ring ( 2 );    a separate pusher tube ( 25 ) that can be slid flush onto the cylindrical tube ( 22 ) and that at the end facing toward the cylindrical tube ( 22 ) has a plurality of slots in the longitudinal direction over at least a portion of its length over the entire circumference, thus creating a plurality of leaves ( 27 ), separated by slots ( 26 ), that can be elastically deflected and each have at their front, free end a radially outwardly directed flange ( 28 ) that can be brought into contact against the spring/damping element ( 5 ) slid onto the cylindrical tube ( 22 ) and with which the spring/damping element ( 5 ) can be slid, while spreading the leaves ( 27 ), over the conical installation taper ( 23 ) onto the circumference of the inner ring ( 2 ).    
     
     
         17 . The device as defined in  claim 16 , wherein the diameter of the cylindrical tube ( 22 ) is smaller than that of the inner ring ( 2 ).  
     
     
         18 . The device as defined in  claim 16  or  17 , wherein the pusher tube ( 25 ) is equipped, at its end opposite the flange ( 28 ), with a handle ( 29 ).