Method for adjusting the play in a high-lift system of an aircraft
A method for adjusting play in a high-lift system of an aircraft with several flaps, moved by a drive unit with the aid of driving stations connected to a driveshaft, includes disengaging the mechanical connections between the driveshaft and the driving stations in the first position, displacing the individual drive levers by mechanically driving a gear input of the associated rotary actuator such that the individual drive levers come into mechanical contact with a stop in a second position, spaced apart from the first position, and are pretensioned by a certain torque, rotationally fixing the gear inputs of the rotary actuators, adapting the length of connecting links between the respective drive levers and a support arm carrying the associated flap such that a position of the associated flap corresponding to the position of the stop is reached, and reconnecting the driving stations to the driveshaft pretensioned to have no play.
1. A method for adjusting the play in a high-lift system of an aircraft, wherein the high-lift system comprises a drive unit, a driveshaft that is connected to the drive unit and several driving stations that are distributed along and mechanically connected to the driveshaft and respectively comprise a rotary actuator with a housing and a drive lever mounted therein, wherein said drive lever extends radially from a rotational axis of the rotary actuator and is coupled to a pivotably mounted flap by a connecting link, and wherein the respective drive levers are moved by rotating the driveshaft with the aid of the drive unit and the flaps are thereby displaced between a retracted and an extended position, the method comprising:
displacing the driving stations into a first position;
disengaging the mechanical connections between the driveshaft and the driving stations in the first position;
displacing the individual drive levers in the direction of an extended position by mechanically driving a gear input of the associated rotary actuator such that the individual drive levers come into mechanical contact with a stop in a second position, which is spaced apart from the first position in the extending direction;
rotationally fixing the gear inputs of the rotary actuators;
adapting the length of the connecting links in such a way that a position of the associated flap corresponding to the position of the stop is reached; and
reconnecting the driving stations to the driveshaft.
2. The method of claim 1 ,
further comprising the arrangement of removable stops on the individual housings in the second position, and
the removal of all stops after adapting the length of the connecting links and producing the connection.
3. The method of claim 1 ,
wherein the stop is an end stop and the second position corresponds to a completely extended position.
4. The method of claim 2 ,
wherein the second position is a 0°-position.
5. The method of claim 1 , wherein the displacement of the individual drive levers includes the arrangement of a rotary device with ratchet mechanism on the gear input of the rotary actuator.
6. The method of claim 1 , wherein the high-lift system comprises dropped-hinge kinematics.