Hydraulic machine
View Patent ↗A hydraulic machine has a gear wheel ( 2 ) with outwardly extending teeth and a gear ring ( 4 ) with inwardly extending teeth formed by rollers each of which is supported in a pocket ( 8 ) in the gear ring, and pressurized spaces are formed between the gear wheel and the inwardly extending teeth. To keep the wear of the machine small each pocket ( 8 ) has at least two different radii (R 1 , R 2 , Rn) whereby a radius (R 2 , Rn) at a smaller displacement from the edge ( 12 ) of the pocket is larger than a radius (R 1 ) at a larger displacement from the same edge ( 12 ) of the pocket ( 8 ).
1. A hydraulic machine with a gear wheel having outwardly extending teeth and a gear ring having inwardly extending teeth,
wherein the inwardly extending teeth are formed by rollers each of which is supported in a pocket in the gear ring,
wherein the gear wheel forms pressure chambers with the inwardly extending teeth,
wherein each pocket has at least two different radii, whereby a radius having a smaller spacing to an edge of the pocket is larger than a radius having a larger spacing from the same edge of the pocket, and
wherein the radii proceed from different axes.
2. The hydraulic machine according to claim 1 , wherein the axes lie on a circular line.
3. The hydraulic machine according to claim 1 , wherein the pocket with respect to its middle plane in a circumferential direction has two mirror symmetrical identical halves.
4. The hydraulic machine according to claim 1 , wherein a middle circumferential section α of the pocket has a constant radius.
5. The hydraulic machine according to claim 4 , wherein the middle circumferential section α has an extent in the range of ±30° to 60°.
6. A hydraulic machine with a gear wheel having outwardly extending teeth and a gear ring having inwardly extending teeth,
wherein the inwardly extending teeth are formed by rollers each of which is supported in a pocket in the gear ring,
wherein the gear wheel forms pressure chambers with the inwardly extending teeth,
wherein each pocket has at least two different radii, whereby a radius having a smaller spacing to an edge of the pocket is larger than a radius having a larger spacing from the same edge of the pocket, and
wherein a radius in the middle of the pocket corresponds to a radius of the roller.
7. A hydraulic machine with a gear wheel having outwardly extending teeth and a gear ring having inwardly extending teeth,
wherein the inwardly extending teeth are formed by rollers each of which is supported in a pocket in the gear ring,
wherein the gear wheel forms pressure chambers with the inwardly extending teeth,
wherein each pocket has at least two different radii, whereby a radius having a smaller spacing to an edge of the pocket is larger than a radius having a larger spacing from the same edge of the pocket, and
wherein the pocket at each of its edges is connected to a planar surface.
8. The hydraulic machine according to claim 7 , wherein an inner boundary of the planar surface lies on a first radial ray proceeding from the axis of the largest radius, which radial ray encloses a first angle γ in a range of 1° to 6° with a second radial ray standing perpendicular to a third radial ray which divides the pocket into halves.
9. The hydraulic machine according to claim 7 , wherein the planar surface encloses a second angle δ in the range of 1° to 6° with a plane which divides the pocket into halves.
10. The hydraulic machine according to claim 9 wherein the first angle γ and the second angle δ are of the same size.