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US 2003/0188940 A1Published application
Hydrodynamic brake
AssigneeScania CV AB
InventorsHans Jonsson, Johnny Arne, Torger Hagen, Anders Kjell
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AssigneeScania CV AB
InventorsHans Jonsson, Johnny Arne, Torger Hagen, Anders Kjell
Estimating the term…
The present invention relates to a hydrodynamic brake, which comprises a stator (1) and a rotor (2). The stator (1) and the rotor (2) are provided coaxially in relation to each other such the annular recesses (5, 10) of the stator (1) and the rotor (2) form a toroid-shaped space. A first medium is arranged to be supplied to said toroid-shaped space for providing a brake action during rotation of the rotor (2). The hydrodynamic brake comprises, with advantage, at least one injection member (16, 17), which is arranged to supply a second medium to the toroid-shaped space for reducing the circulation of air in the toroid-shaped space during time periods, when no brake action is desired. The second medium is supplied, at least one location, to the toroid-shaped space with a pressure and in a direction, which at least partly is directed towards the principal flow direction (a) of the circulating air.
Hydrodynamic brake comprising a stator (1) and a rotor (2) which each comprises a body having an annular recess (5, 10) and a plurality of vanes (8, 13) provided in the respective recesses (5, 10) of the stator (1) and the rotor (2), wherein the stator (1) and the rotor (2) are provided coaxially in relation to each other in such a way that the annular recesses (5, 10) of the stator (1) and the rotor (2) form a toroid-shaped space, a first medium arranged to be supplied to said toroid-shaped space for providing a brake action during rotation of the rotor (2), and means arranged to supply a second medium to the toroid-shaped space during time periods, when no brake action is desired, for reducing the circulation of air in the toroid-shaped space, characterised in that said means is arranged to supply the second medium, at at least one location, to the toroid-shaped space with a pressure and in a direction which at least partly is directed towards the principal flow direction of the circulating air (a).
Hydrodynamic brake according to any one of the preceding claims, characterised in that said means comprises at least one injection member (16, 17) which is arranged to inject the second medium into the toroid-shaped space.
Dependencies are inferred from the claim text.