| 摘要 |
An oxidizer control device for controlling the amount of oxidizer passing into a combustion chamber of a gas turbine engine. The device has first and second diaphragm assemblies located adjacent to each other at a front portion of the chamber. The first diaphragm assembly has a first, generally annular member with a plurality of circumferentially spaced apart vanes, adjacent vanes forming first oxidizer passageways therebetween, the first passageways opening through a periphery of the first member, and a second generally annular member extending around the periphery of the first member, the second member having a plurality of circumferentially spaced apart first orifices equal in number to the number of first passageways and being fixedly attached to the engine structure. The second diaphragm assembly has a third generally annular member with a plurality of circumferentially spaced apart vanes, adjacent vanes forming second oxidizer passageways therebetween, the second passageways opening through a periphery of the third member, which is fixedly attached to the engine structure and a fourth generally annular member extending around the periphery of the third member, the fourth member having a plurality of circumferentially spaced apart second orifices equal in number to the number of second passageways. An actuator is connected to the first and fourth members of each pair of assemblies so as to simultaneously rotate the first member relative to the second member, and the fourth member relative to the third member, such relative movement opening or closing the first and second oxidizer passageways.
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