05-01-2012 дата публикации
Номер: US20120003093A1
Turbochargers operate at extremely high speed, so balance of the rotating core is of the utmost importance to turbocharger life. A special frusto-conical, or frusto-spherical, centering geometry is added to the interface of the compressor nut and the nose of the compressor wheel to aid in keeping the wheel, nut, and stub-shaft centered on the turbocharger axis to reduce the degree of core unbalance. 1. A rotating assembly , comprising:{'b': 52', '56, 'a shaft () with a turbine end and a threaded compressor end (),'}{'b': '51', 'a turbine wheel () rigidly connected to the turbine end of the shaft,'}{'b': '30', 'a compressor nut (), and'}{'b': 21', '22', '30, 'a compressor wheel with a nose end () and a hub end (), and held in position on the compressor end of the shaft by the clamp load from the compressor nut () threaded onto said threaded end of the shaft,'}wherein said rotating assembly rotates about a centerline, and{'b': 34', '36', '37', '38', '39', '92', '95', '96', '99', '94', '93', '98', '97', '100', '101, 'wherein the nut (, , , , ) and the compressor wheel nose end face are provided with complementary engaging surfaces (, ; , ; , ; , ; , ) such that tightening of the nut against the compressor wheel urges the compressor wheel into a predefined position relative to the nut.'}292959897. The rotating assembly as in claim 1 , wherein at least a part of the complementary engaging surfaces ( claim 1 , ; claim 1 , ) are frusto-spherical surfaces.392959493100101. The rotating assembly as in claim 1 , wherein at least a part of the complementary engaging surfaces ( claim 1 , ; claim 1 , ; claim 1 , ) are frusto-conical surfaces.492959897. The rotating assembly as in claim 1 , wherein the complementary engaging surfaces ( claim 1 , ; claim 1 , ) are frusto-spherical surfaces.592959493100101. The rotating assembly as in claim 1 , wherein the complementary engaging surfaces ( claim 1 , ; claim 1 , ; claim 1 , ) are frusto-conical surfaces.69599949810092969397101. The ...
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