AIR FEED DEVICE FOR A FUEL CELL

摘要

An air feed device (1) for a fuel cell, having a shaft (2); a compressor wheel (4) fastened to one of the ends (5, 20) of the shaft (2), a bearing arrangement (6, 7, 8) arranged in a bearing housing (9) for mounting the shaft (2), and an electric motor (10) for driving the shaft (2), which electric motor is arranged in the bearing housing (9). The shaft (2) has two shaft bearing portions (11, 12) and a magnet portion (13) arranged between the shaft bearing portions (11, 12), forming the rotor of the electric motor (10). The shaft bearing portions (11, 12) and the magnet portion (13) are centered relative to one another by means of a centering arrangement (12A, 13F) which engages on an outer edge (A), the shaft bearing portions (11, 12) and the magnet portion (13) bearing in each case axially against one another.

主权项

1. An air feed device (1) for a fuel cell, having
a shaft (2); a compressor wheel (4) which is arranged in a compressor housing (3) and which is fastened to one end (5) of the ends (5, 20) of the shaft (2), a bearing arrangement (6, 7, 8) which is arranged in a bearing housing (9) for mounting the shaft (2), and an electric motor (10) for driving the shaft (2), which electric motor is arranged in the bearing housing (9), wherein the shaft (2) has two shaft bearing portions (11, 12), which are formed as separate components, and has a magnet portion (13), which is arranged between the shaft bearing portions (11, 12), forms a separate component and forms the rotor of the electric motor (10), the shaft bearing portions (11, 12) and the magnet portion (13) being braced against one another, and wherein the shaft bearing portions (11, 12) and the magnet portion (13) are centered relative to one another by means of a centering arrangement (12A, 13F) which engages on an outer edge (A), the shaft bearing portions (11, 12) and the magnet portion (13) bearing in each case axially against one another.