| 摘要 |
A bearing unit comprises a radially outer stationary race ( 1 ) and a pair of radially inner rotatable half-races ( 2 a , 2 b). Au intermediate annular chamber ( 8 ) is defined between the outer race ( 1 ) and the inner half-races ( 2 a , 2 b) The intermediate chamber communicates with the outside through first air passages ( 5 ) formed in the outer race ( 1 ) and with the inside of the bearing unit through second radial air passages ( 6 ) defined between the inner half-races ( 2 a , 2 b). An intermediate annular member ( 10 ) is axially interposed between the inner half-races ( 2 a , 2 b) and defines the second passages ( 6 ). |
