Hydraulic Toothed Wheel Machine

Abstract

A toothed wheel machine including a housing for receiving two meshing toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. Hydraulic mechanical forces are generated during the operation of the toothed wheel machine, an axial force component of the forces acting on each toothed wheel in the same axial direction. In order to counteract said axial force component, a pressure field is provided between at least one axial surface of one of the toothed wheels in the direction of the action of the axial force component, and the bearing body adjacent to the at least one axial surface.

1 . A toothed wheel machine having a housing for accommodating two intermeshing toothed wheels, which are supported in a sliding manner axially by axial surfaces between bearing bodies accommodated in the housing and radially by respective bearing shafts accommodated in the bearing bodies, in which an axial force component of a force resulting from hydraulic and mechanical forces arising during operation of the toothed wheel machine acts on each toothed wheel in the same axial direction, wherein at least one pressure field is provided between at least one axial surface of a toothed wheel, said axial surface lying in the direction of action of the axial force component, and the bearing body adjoining the at least one axial surface. 
     
     
         2 . The toothed wheel machine as claimed in  claim 1 , wherein the toothed wheels are helically toothed. 
     
     
         3 . The toothed wheel machine as claimed in  claim 1  , wherein a pressure field is provided between those axial surfaces of the toothed wheels which lie in the direction of action of the axial force component and that sliding surface of the bearing body which lies opposite the axial surfaces. 
     
     
         4 . The toothed wheel machine as claimed in  claim 3 , wherein the pressure fields have different effective areas in the axial direction of the toothed wheels. 
     
     
         5 . The toothed wheel machine as claimed in  claim 2 , wherein the pressure fields are designed as pressure pockets. 
     
     
         6 . The toothed wheel machine as claimed in  claim 5 , wherein the pressure pockets are introduced as pressure grooves into the sliding surfaces of the bearing body lying in the direction of action of the axial force component. 
     
     
         7 . The toothed wheel machine as claimed in  claim 6 , wherein the sliding surface of the bearing body lying in the direction of action of the axial force component has introduced into it a first pressure groove, running concentrically around a first bearing eye, and a second pressure groove, spanning a partial circle around a second bearing eye. 
     
     
         8 . The toothed wheel machine as claimed in  claim 7 , wherein the pressure grooves are in pressure-medium communication with the high pressure of the toothed wheel machine via connection grooves. 
     
     
         9 . The toothed wheel machine as claimed in  claim 5 , wherein the pressure pockets are introduced into those axial surfaces of the toothed wheels which lie in the direction of action of the axial force component. 
     
     
         10 . The toothed wheel machine as claimed in  claim 9 , wherein the pressure pockets are formed around and along a portion of the circumference of the respective bearing shafts of the toothed wheels. 
     
     
         11 . The toothed wheel machine as claimed in  claim 9 , wherein the pressure pockets are formed so as to run around the respective bearing shafts of the toothed wheels. 
     
     
         12 . The toothed wheel machine as claimed in  claim 11 , wherein at least one pressure pocket is enlarged by tooth pocket sections introduced into tooth end faces of the teeth of toothed wheel. 
     
     
         13 . The toothed wheel machine as claimed in  claim 10 , wherein the pressure pockets are supplied with pressure oil via the adjoining bearing body.