Hydraulic device including a face plate

Abstract

The invention is related to a hydraulic device comprising a housing including pipe ports, a rotor ( 14 ) having rotor chambers ( 9 ) which are formed by a cylinder ( 11 ) and a piston ( 12 ) which rotate about a first axis of rotation (m 1 ) and a second axis of rotation (m 2 ). Both axes of rotation extend within a common plane and intersect each other. A face plate ( 4 ) including a face plate centre line which coincides with the second axis of rotation (ml) has two or more face plate ports ( 3 ) which are each communicating with a pipe port for communicating the pipe port with the rotor chambers ( 9 ). An adjustment device adjusts the mutual positions of the face plate ( 4 ) and the common plane. Corresponding to the invention a face plate bearing ( 30, 32 ) between the face plate ( 4 ) and the housing has at least two axes of rotation which intersect the face plate centre line preferably perpendicularly and upon rotating the face plate ( 4 ) the common plane rotates with respect to the housing.

1 . A hydraulic device comprising:
 a housing,   two or more pipe ports in the housing,   a rotor including a plurality of rotor chambers which are each formed by a cylinder and a piston which rotate about a first axis of rotation and a second axis of rotation, respectively, wherein both axes of rotation extend in a common plane and intersect each other by an acute angle such that upon rotating the rotor the volume of the rotor chambers changes,   a face plate including a face plate centre line which coincides with the second axis of rotation, wherein the face plate comprises two or more face plate ports which each connect with a pipe port in the housing for connecting the pipe port with the rotor chambers,   an adjustment device for adjusting the mutual positions of the face plate and the common plane, and   wherein a face plate bearing, between the face plate and the housing, has at least two axes of rotation which intersect the face plate centre line, and   wherein upon rotating the face plate the common plane rotates with respect to the housing.   
     
     
         2 . The hydraulic device according to  claim 1 , wherein two axes of rotation of the face plate bearing intersect the face plate centre line in the intersection point of the first axis of rotation and the second axis of rotation. 
     
     
         3 . The hydraulic device according to  claim 1 , wherein the face plate bearing comprises a spherical surface of the face plate and a concave surface of the housing, in which the spherical surface can rotate. 
     
     
         4 . The hydraulic device according to  claim 1 , wherein the face plate bearing comprises cylindrical bearings having non-parallel axes of rotation. 
     
     
         5 . The hydraulic device according to  claim 1 , wherein the housing is provided with a limiting edge which limits rotation of the face plate with respect to the housing. 
     
     
         6 . The hydraulic device according to  claim 3 , wherein the face plate and the housing are provided with meshing teeth. 
     
     
         7 . The hydraulic device according to  claim 3 , wherein support cylinders are provided between the housing and the face plate and wherein via a channel the support cylinder(s) communicates with the face plate port which is located diametrically opposite to the support cylinder(s). 
     
     
         8 . The hydraulic device according to  claim 7 , wherein the face plate port has a connection opening at the side of the spherical surface and wherein the face plate around the connection opening has a sealing ridge which seals against the concave surface of the housing. 
     
     
         9 . The hydraulic device according to  claim 7 , wherein each support cylinder is supported by a support surface of the housing wherein the support surface forms a part of a cylinder of which the centre line intersects the axis of rotation perpendicularly. 
     
     
         10 . The hydraulic device according to  claim 8 , wherein the projection of the connection opening on a plane perpendicular to the face plate centre line has the same surface area and centre of gravity at the same location as the projection of the face plate port on the plane perpendicular to the face plate centre line and wherein the projection of the connection opening on a plane through the face plate centre line and extending perpendicular to a line through the centre of gravity of the surface of the connection opening and the face plate centre line has the same surface area and centre of gravity in the same location as the projection of the contact surfaces of the support cylinder(s) with the housing on the plane. 
     
     
         11 . The hydraulic device according to  claim 3 , wherein the face plate port is provided with ridges such that the largest dimension of a channel through the face plate is smaller than three times the width of the face plate port. 
     
     
         12 . The hydraulic device according to  claim 1 , wherein the at least two axes of rotation of the face plate bearing intersect the face plate centre line perpendicularly. 
     
     
         13 . The hydraulic device according to  claim 2 , wherein the face plate bearing comprises a spherical surface of the face plate and a concave surface of the housing, in which the spherical surface can rotate. 
     
     
         14 . The hydraulic device according to  claim 2 , wherein the face plate bearing comprises cylindrical bearings having non-parallel axes of rotation. 
     
     
         15 . The hydraulic device according to  claim 8 , wherein each support cylinder is supported by a support surface of the housing wherein the support surface forms a part of a cylinder of which the centre line intersects the axis of rotation perpendicularly. 
     
     
         16 . The hydraulic device according to  claim 9 , wherein the projection of the connection opening on a plane perpendicular to the face plate centre line has the same surface area and centre of gravity at the same location as the projection of the face plate port on the plane perpendicular to the face plate centre line and wherein the projection of the connection opening on a plane through the face plate centre line and extending perpendicular to a line through the centre of gravity of the surface of the connection opening and the face plate centre line has the same surface area and centre of gravity in the same location as the projection of the contact surfaces of the support cylinder(s) with the housing on the plane.