Gear pump for compressible liquids or fluids
Disclosed is a gear pump including a pumping chamber in which a first shaft and a second shaft are rotated about their respective axes, each of the first and second shafts supporting at least one hydraulic-pumping element that hydraulically pumps a fluid in the pumping chamber, the at least one hydraulic-pumping element of each of the first and second shafts being positioned in the pumping chamber and each having at least one first radial projection. In the pumping chamber, each of the first and second shafts further supports at least one mechanical drive pinion that rotates each of the first and second shafts, each mechanical drive pinion having second radial projections. The at least one mechanical drive pinion is separate from the at least one hydraulic-pumping element, and the number of the at least one first radial projection and of the second radial projections is different.
1. A gear pump comprising:
a pumping chamber in which a first shaft and a second shaft are driven in rotation about the respective axis thereof, each of the first and second shafts bearing at least one hydraulic pumping element providing the hydraulic pumping of a fluid in the pumping chamber, said at least one hydraulic pumping element of each of said first and second shafts being positioned in said pumping chamber and each having at least one first radial projection, in the pumping chamber, each of said first and second shafts bearing at least one mechanical drive pinion configured to mechanically drive in rotation each of said first and second shafts, each mechanical drive pinion having second radial projections; and
an angular adjustment means for angular adjusting of the position of the at least one hydraulic pumping element with respect to the at least one mechanical drive pinion about the respective axis of the first and second shafts,
wherein, on each of said first and second shafts, said at least one mechanical drive pinion is distinct from said at least one hydraulic pumping element,
wherein said at least one first radial projection and said second radial projections differ in number, and
an assembly formed by said at least one mechanical drive pinion and said at least one hydraulic pumping element of said first and second shafts constitutes the gearing of the pump.
2. The gear pump according to claim 1 , wherein said at least one hydraulic pumping element of each shaft is made from at least one gear wheel with lobes, the lobes constituting first projections for the hydraulic pumping element.
3. The gear pump according to claim 2 , wherein said at least one first projection has a first radial height,
wherein the second projections have a second radial height, and
wherein said first radial height is greater than said second radial height.
4. The gear pump according to claim 2 , wherein each of the first and second shafts bears a mechanical drive pinion positioned between two hydraulic pumping elements.
5. The gear pump according to claim 2 , wherein each of the first and second shafts bears a hydraulic pumping element positioned between two mechanical drive pinions.
6. The gear pump according to claim 2 , wherein each of the first and second shafts bears a hydraulic pumping element and a mechanical drive pinion.
7. The gear pump according to claim 2 , wherein said at least one hydraulic pumping element and said at least one mechanical drive pinion of each shaft are made in a single piece.
8. The gear pump according to claim 1 , wherein said at least one first projection has a first radial height,
wherein the second projections have a second radial height, and
wherein said first radial height is greater than said second radial height.
9. The gear pump according to claim 8 , wherein each of the first and second shafts bears a mechanical drive pinion positioned between two hydraulic pumping elements.
10. The gear pump according to claim 8 , wherein each of the first and second shafts bears a hydraulic pumping element positioned between two mechanical drive pinions.
11. The gear pump according to claim 8 , wherein each of the first and second shafts bears a hydraulic pumping element and a mechanical drive pinion.
12. The gear pump according to claim 8 , wherein said at least one hydraulic pumping element and said at least one mechanical drive pinion of each shaft are made in a single piece.
13. The gear pump according to claim 1 , wherein each of the first and second shafts bears a mechanical drive pinion positioned between two hydraulic pumping elements.
14. The gear pump according to claim 13 , wherein said at least one hydraulic pumping element and said at least one mechanical drive pinion of each shaft are made in a single piece.
15. The gear pump according to claim 1 , wherein each of the first and second shafts bears a hydraulic pumping element positioned between two mechanical drive pinions.
16. The gear ar pump according to claim 1 , wherein each of the first and second shafts bears a hydraulic pumping element and a mechanical drive pinion.
17. The gear pump according to claim 1 , wherein said at least one hydraulic pumping element and said at least one mechanical drive pinion of each shaft are made in a single piece.
18. The gear pump according to claim 1 , wherein, on each of the first and second shafts, said at least one mechanical drive pinion is fixed to said at least one hydraulic pumping element.
19. The gear pump according to claim 1 , wherein, for each of said first and second shafts, said at least one hydraulic pumping element and said at least one mechanical drive pinion are made from different materials.