초록 ▼

A bearing support of the rotor of an exhaust gas turbocharger with two inwardly disposed roller bearings in which, to assure a long length of life of the bearing, the roller members of the bearings are pressed constantly against their races so that they roll off along the same in a defined manner an

A bearing support of the rotor of an exhaust gas turbocharger with two inwardly disposed roller bearings in which, to assure a long length of life of the bearing, the roller members of the bearings are pressed constantly against their races so that they roll off along the same in a defined manner and no wear occurs as a result of sliding or load changes. The abutment forces which act at the bearings are produced by one or several pneumatic cylinders whose pressure spaces are preferably in connection with a gas space of the compressor. As the magnitude of the charging pressure of the compressor is dependent on the rotational speed, the abutment forces are also variable with the rotational speed. The piston surfaces of the pressure cylinders are so matched that at low rotational speeds as low as possible a bearing friction loss results whereas the abutment forces are still sufficiently high to assure a damage-free bearing operation. As a result of the charging pressure rising with increasing rotational speeds, the necessary considerably higher abutment forces are also available at higher rotational speeds.

대표청구항 ▼

A bearing support of a shaft of an exhaust gas turbocharger in two roller bearing means arranged between its compressor and turbine, and in which the roller bearing means include bearing ring means forming race means, comprising axially acting elastic means pressing the race means of the bearing rin

A bearing support of a shaft of an exhaust gas turbocharger in two roller bearing means arranged between its compressor and turbine, and in which the roller bearing means include bearing ring means forming race means, comprising axially acting elastic means pressing the race means of the bearing ring means which cooperate in a given roller bearing means and are axially displaceable relative to one another, against the roller members of the roller bearing means including pneumatic cylinder means operatively connected with the axially displaceable bearing ring means, the pneumatic cylinder means being provided with a pressure space operatively connected with a gas space of one of compressor or turbine to provide bearing preload as a function of the pressure of the compressor or turbine.