| 摘要 |
A valve arrangement for varying a cross-sectional flow area of hot gases, particularly the fuel-rich gases of a ramjet engine, comprising, a housing, a valve seat defining an intake opening for the hot gases in the housing, a conduit in the housing connected to the valve seat for supplying hot gases to the intake opening and a valve body which is slidably mounted in the housing and movable toward and away from the valve seat to vary the flow area of the hot gases. The valve body is driven by a worm mechanism having at least one spur gear directly connected to the valve body through pins which extend through inclined or helical slots in the valve body so that, rotation of the gear causes rotation and linear movement of the valve body.
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