Blade gap seal device having a control function

The present invention has a blade gap seal device control function, a rotor mounted on the periphery of the stator, includes an upstream ring, the blade assembly, the downstream ring and control ring; blade ring assembly is mounted between the upstream and the downstream ring; downstream control loop adjacent ring. The present invention is applicable to a variety of rotating machinery, especially for aviation engines, gas turbines and other equipment, enables quick response to the device status and adjust the seal gap, but also allows the sealing device and the rotor rubbing short without affecting the sealing performance, so that AP will work in a more economical state operation.