Mixer and mixing device for an exhaust system
AssigneeEberspächer Exhaust Technology GmbH & Co. KG
InventorsJürgen Kobe, Felix Hackländer, David Binder, Frank Berkemer
Life of this patent
Estimating the term…
Abstract
A mixer (19), for an exhaust system (7) for mixing and/or evaporating a liquid (13) in an exhaust gas flow (8), especially for an SCR system (9), includes a plurality of guide blades (21) arranged in a star-shaped pattern. Simplified manufacturability of the mixer (19) is achieved if the guide blades (21) are connected each with a centrally arranged core (23) radially on the inside and if the guide blades (21). The guide blades (21) and the core (23) are formed by an integral cast part (24).
Claims21
A mixer for an exhaust system for at least one of mixing and evaporating a liquid in an exhaust gas flow, for an SCR system, the mixer comprising:
- a centrally arranged core;
- a plurality of guide blades, the guide blades each having a leading edge and a discharge edge and being connected, at a radially inner side, with the centrally arranged core and extending radially outward from the centrally arranged core for thereby providing a star-shaped pattern, wherein at least one of the guide blades has said discharge edge at an end area bent, at an angle in relation to an area of the respective guide blade adjoining the end area in an upstream direction towards the leading edge of the at least one of the guide blades such that the end area has a smaller pitch angle than the area adjoining the end area in the upstream direction;
- further comprising an incoming flow-side ring connected with all guide blades at leading edges thereof.
A mixing device for an exhaust system, the mixing device comprising:
- an exhaust pipe comprising an inner wall defining a radially extending cross section through which an exhaust gas flow can flow;
- a mixer comprising:
- a centrally arranged core;
- a plurality of guide blades,
- the guide blades each having a leading edge and a discharge edge and being connected, at a radially inner side, with the centrally arranged core and extending radially outward from the centrally arranged core for thereby providing a star-shaped pattern, wherein at least one of the guide blades has said discharge edge at an end area bent, at an angle in relation to an area of the respective guide blade adjoining the end area in an upstream direction towards the leading edge of the at least one of the guide blades such that the end area has a smaller pitch angle than the area adjoining the end area in the upstream direction;
- further comprising an incoming flow-side ring connected with all guide blades at leading edges thereof;
- a separate retainer, with which the mixer is fastened to the exhaust pipe.
A mixer for an exhaust system for at least one of mixing and evaporating a liquid in an exhaust gas flow, for an SCR system, the mixer comprising:
- a centrally arranged core comprising a longitudinal axis;
- a plurality of guide blades, each of the guide blades having a leading edge and a discharge edge, each of the guide blades being connected, at a radially inner side, with the centrally arranged core and each of the guide blades extending radially outward from the centrally arranged core with respect to the longitudinal axis to define a star pattern of the plurality of guide blades, wherein the guide blades are integrally connected to the core to define a one-piece guide blades and core structure, wherein at least one of the guide blades comprises an end area and a blade area, the blade area being directly adjacent to the end area, the discharge end being located at the end area, the discharge end being bent at an angle relative to the blade area, the blade area extending in a direction upstream of the discharge end, with respect to the exhaust gas flow, towards the leading edge of the at least one of the guide blades, the end area having an end area pitch angle, the blade area having a blade area pitch angle, the end area pitch angle being less than the blade area pitch angle;
- further comprising an incoming flow-side ring connected with all guide blades at leading edges thereof.
Dependencies are inferred from the claim text.