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US 10,451,059 B2Granted
Pump for conveying a fluid, in particular for conveying an exhaust gas cleaning additive
AssigneeContinental Automotive GmbH
InventorsJan Hodgson, Yves Kopp, Georges Maguin
Life of this patent
Estimating the term…
Abstract
A pump for conveying a fluid includes a pump housing, an eccentric, a deformable element arranged in a pump gap between the inner circumferential surface of the pump housing, and an outer surface of the eccentric, such that a conveying channel is formed from an inlet to an outlet. A stationary seal is provided between the outlet and the inlet and prevents a backflow of the fluid from the outlet back to the inlet. The inner circumferential surface of the pump housing has a recess in the region of the stationary seal, and the deformable element is tensioned fluid-tight at the inner circumference surface in the region of the recess using a pin.
Claims9
A pump (1) for delivering a liquid, comprising:
- a pump housing (2) having at least one inlet (3), at least one outlet (4), and an inner circumferential face (13) forming a cylindrical basic form (14);
- a drive shaft (32) defining a geometric axis (23) and axial direction (24) of the pump (1);
- an eccentric (5) arranged within the pump housing (2), the eccentric (5) being movable relative to the pump housing (2) about the geometric axis (23), the eccentric (5) having an outer face (6);
- a deformable element (7) arranged in a pump gap (11) between the inner circumferential face (13) of the pump housing (2) and the outer face (6) of the eccentric (5);
- a delivery duct (8) extending from the at least one inlet (3) to the at least one outlet (4) by the deformable element (7) and by the inner circumferential face (13) of the pump housing (2);
- a static seal (25) arranged between the at least one outlet (4) and the at least one inlet (3), the static seal (25) being configured to prevent a backflow of the liquid from the at least one outlet (4) back to the at least one inlet (3);
- and
- centering rings (22) arranged at both sides of the eccentric (5), wherein the deformable element (7) is pressed by the centering rings (22) against the inner circumferential face (13) of the pump housing (2) in each case, such that in each said case one annular contact seal (20) is formed,
- wherein the deformable element (7) is pressed against the pump housing (2) along at least one section of the delivery duct (8) by the outer face (6) of the eccentric (5) such that at least one displaceable seal (9) of the delivery duct (8) and at least one closed pump volume (10) are formed in the delivery duct (8), the at least one displaceable seal (9) and the at least one closed pump volume (10) being displaceable along the delivery duct (8) from the at least one inlet (3) to the at least one outlet (4) by an eccentric movement of the eccentric (5) for the delivery of the liquid, and
- wherein the inner circumferential face (13) of the pump housing (2) has a recess (26) in a region of the static seal (25), and the deformable element (7) is braced in fluid-tight fashion against the inner circumferential face (13) in a region of the recess (26) by a pin (27), the pin (27) being configured to fix the centering rings (22) in the region of the static seal (25).
7 more elements
A pump (1) for delivering a liquid, comprising:
- a pump housing (2) having at least one inlet (3), at least one outlet (4), and an inner circumferential face (13) forming a cylindrical basic form (14);
- a drive shaft (32) defining a geometric axis (23) and axial direction (24) of the pump (1);
- an eccentric (5) arranged within the pump housing (2), the eccentric (5) being movable relative to the pump housing (2) about the geometric axis (23), the eccentric (5) having an outer face (6);
- a deformable element (7) arranged in a pump gap (11) between the inner circumferential face (13) of the pump housing (2) and the outer face (6) of the eccentric (5);
- a delivery duct (8) extending from the at least one inlet (3) to the at least one outlet (4) by the deformable element (7) and by the inner circumferential face (13) of the pump housing (2);
- and
- a static seal (25) arranged between the at least one outlet (4) and the at least one inlet (3), the static seal (25) being configured to prevent a backflow of the liquid from the at least one outlet (4) back to the at least one inlet (3),
- wherein the deformable element (7) is pressed against the pump housing (2) along at least one section of the delivery duct (8) by the outer face (6) of the eccentric (5) such that at least one displaceable seal (9) of the delivery duct (8) and at least one closed pump volume (10) are formed in the delivery duct (8), the at least one displaceable seal (9) and the at least one closed pump volume (10) being displaceable along the delivery duct (8) from the at least one inlet (3) to the at least one outlet (4) by an eccentric movement of the eccentric (5) for the delivery of the liquid,
- wherein the inner circumferential face (13) of the pump housing (2) has a recess (26) in a region of the static seal (25), and the deformable element (7) is braced in fluid-tight fashion against the inner circumferential face (13) in a region of the recess (26) by a pin (27),
- wherein, with respect to both sides of the eccentric (5) in the axial direction (24), the deformable element (7) is arranged between the inner circumferential face (13) and centering rings (22) arranged at the both sides of the eccentric (5), wherein the deformable element (7) is pressed by the centering rings (22) against the inner circumferential face (13) of the pump housing (2) in each case, such that in each said case one annular contact seal (21) is formed,
- wherein the centering rings (22) arranged at the both sides of the eccentric (5) have, in the region of the static seal (25), a protuberance (28) projecting into the recess (26) of the inner circumferential face (13) of the pump housing (2), and wherein the pin (27) is configured to fix the centering rings (22) in the region of the static seal (25).
8 more elements
Dependencies are inferred from the claim text.