Sealing ring for a piston pump

Abstract

A sealing ring is configured to dynamically seal a pistol in a piston pump. The piston is guided in a piston housing or in a guide ring. The sealing ring is arranged on an outer circumference of the piston. The outer circumference of the piston forms a running surface. The sealing ring has an outer circumferential surface with at least one circumferential groove. The sealing ring also has an inner circumferential surface with at least one circumferential sealing When the sealing ring is in an installed state, limbs of the at least one sealing lip each form a defined angle with the running surface. The defined angles are formed, starting from an initial angle, by deforming the sealing ring during installation. The sealing ring is twisted about a center of its profile during the installation.

1 . A sealing ring for dynamically sealing a piston of a piston pump, comprising:
 an annular basic body having an outer circumferential surface with at least one encircling groove and having an inner circumferential surface with at least one encircling sealing lip,
 wherein the at least one encircling sealing lip has limbs, 
 wherein, when the sealing ring is in an installed state, the limbs each enclose a defined angle with a running surface of an outer circumference of the piston, and 
 wherein the defined angles are formed, starting from initial angles,  by deformation of the sealing ring during installation. 
   
     
     
         2 . The sealing ring as claimed in  claim 1 , wherein the sealing ring is configured to be distorted about a center point of a profile during fitting. 
     
     
         3 . The sealing ring as claimed in  claim 1 , wherein the profile of the sealing ring is distorted between 19° and 22°. 
     
     
         4 . The sealing ring as claimed in  claim 1 , wherein:
 the inner circumferential surface further includes two encircling grooves configured to form two lips, and   the sealing lip is formed between the two lips.   
     
     
         5 . The sealing ring as claimed in  claim 4 , wherein the sealing lip protrudes over the lips in a radial direction. 
     
     
         6 . The sealing ring as claimed in  claim 4 , wherein the sealing lip has a radius between 0.1 and 0.4 mm. 
     
     
         7 . A piston pump comprising:
 a piston guided in one of a piston housing and a guide ring; and   a sealing ring configured to dynamically seal the piston, the sealing ring including:
 an annular basic body having an outer circumferential surface with at least one encircling groove and having an inner circumferential surface with at least one encircling sealing lip,
 wherein the at least one encircling sealing lip has limbs, 
 wherein when the sealing ring is in an installed state, the limbs each enclose a defined angle with a running surface of an outer circumference of the piston, and 
 wherein the limbs have initial angles, and the defined angles are formed by deformation of the sealing ring during installation. 
 
   
     
     
         8 . The piston pump as claimed in  claim 7 , wherein the sealing ring is arranged via at least three contact surfaces in a groove running between two components of the piston pump. 
     
     
         9 . The piston pump as claimed in  claim 7 , wherein:
 the sealing ring has a first limb and a second limb,   the first limb is configured to be acted upon axially with a higher pressure, and   the second limb is configured to be acted upon axially with a lower pressure.   
     
     
         10 . The piston pump as claimed in  claim 7 , wherein:
 a first defined angle between the first limb and a running surface of the piston is between 16° and 18°, and   a second defined angle between the second limb and the running surface of the piston is between 59° and 61°.