| 摘要 |
<p>PURPOSE:To smoothly turn a valve shaft with a small leakage amount of exhaust gas from the valve shaft. CONSTITUTION:A valve 5 is connected to an arm 6 by a shaft 7. A base end of the arm 6 is welded to one end of a valve shaft 8. A bearing 9 is fixed to a turbine housing 2 to provide a step difference in the internal periphery in a lower end part of this bearing, and between a shoulder 9b of this bearing and an end surface 6c of the arm 6, a seal ring 13 of small diameter and a seal ring 14 of large diameter are arranged by each two sheets in an axial line direction to be overlapped together with each other. Both the seal rings 13, 14 are made of ceramics.</p> |
