Three-channel axisymmetric adjustable air inlet channel of wide-area combined engine

The utility model discloses a three-channel axisymmetric adjustable air inlet channel of a wide-area combined engine, which mainly comprises a partial movable lip cover molded surface, a partial movable central cone, a fixed splitter plate component and a valve switch to form a turbojet channel, a fan channel and a stamping channel. Under the low Mach number (Ma0-2), a fan channel is opened, and a stamping channel is closed; under the high Mach number (Ma > 2), a fan channel is closed, and a stamping channel is opened; and the turbojet channel is always in an open state in all Mach number ranges. Along with the increase of the Mach number of the incoming flow, the front half part of the central cone horizontally moves forwards to ensure a high flow coefficient in a wide range, shock wave sealing is realized when the flow is more than Ma2, and the flow coefficient of an air inlet channel is kept at 1.0; the lip cover is linked with the central cone to ensure that the contraction ratio of the inner and outer cu