| 摘要 |
<p>A variable geometry turbine has a housing 5 for receipt of the turbine wheel 4. A gas flow control mechanism in the housing upstream of said turbine wheel 4 is operable to control gas flow through a gas flow inlet passage 13. The control mechanism has a movable nozzle ring 14 or shroud plate 15 for varying the size of the gas flow inlet passage 13. A transmission mechanism for connection between an actuator and the control mechanism converts movement applied by the actuator into movement of the shroud plate 15 or nozzle ring 14. The transmission mechanism comprises a yoke 22 having a shaft 23 that is rotatably supported by at least one support 24, 25 on the inside of the housing. The yoke 22 defines arms 26 that extend outwardly of the shaft 23 and which engage with the shroud or nozzle ring. There is provided at least one recess 36, 37 defined in an inside surface of the housing, the recess 36, 37 extending away from the at least one support 24, 25 and away from the shaft rotation axis and configured to allow passage of an end 26a, 26b of the yoke shaft 23 along it during insertion of the yoke 22 into the housing 5.</p> |
