Kinematic decoupling of axisymmetric vector nozzle adjustment mechanism with moving pair

Abstract

The invention discloses an exercise-decoupling axial-symmetry thrust vectoring nozzle adjusting mechanism with sliding pairs. The exercise-decoupling axial-symmetry thrust vectoring nozzle adjusting mechanism with the sliding pair comprises a static platform, a moving platform and a six-branch parallel mechanism with three degree of freedom. The six-branch parallel mechanism is formed by connection from the axial-symmetry thrust vectoring nozzle adjusting mechanism to the static platform and the moving platform; the axial-symmetry thrust vectoring nozzle adjusting mechanism comprises three driving branches and three driven branches. A first driven branch and a second driven branch respectively comprise a universal pair, a lower revolute pair and an upper revolute pair connected sequentially in series. A third driven branch comprises a sliding pair, a revolute pair and a universal pair sequentially connected in series. A fourth driving branch, a fifth driving branch and a sixth driving branch respectively comprise an upper spherical hinge pair, a sliding pair and a lower spherical hinge pair. With the exercise-decoupling axial-symmetry thrust vectoring nozzle adjusting mechanism with the sliding pair, pure rotating output of the adjustable ring can be realized, the adjustable ring is not driven by a shaft to rotate when rotating around the shaft, so that the exercise-decoupling axial-symmetry thrust vectoring nozzle adjusting mechanism has the advantages of good exercise-decoupling performance, easy control and the like; the exercise-decoupling axial-symmetry thrust vectoring nozzle adjusting mechanism has less spherical hinge pairs, so that production cost and mounting difficulty are reduced.

Description

technical field [0001] The invention relates to a device in the field of aero-engine technology, in particular to an axisymmetric vector nozzle adjustment mechanism with motion decoupling and a moving pair. Background technique [0002] Axisymmetric thrust vectoring technology is one of the key technologies of modern advanced fighter jets. It is characterized by manipulating the aircraft by changing the direction of the airflow of the engine tail nozzle to provide additional moments for yaw and pitch while achieving horizontal propulsion. The introduction has fully brought into play and improved the stealth, maneuverability, agility, short take-off and landing capability and supersonic cruise of fighter jets. Achieving thrust vectoring requires a corresponding thrust vectoring device, among which the Axial-Symmetric Vectoring Exhaust Nozzle (AVEN), which can rotate 360 ​​degrees, represents the development direction of engine exhaust system design and research. In the vecto...

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Problems solved by technology

However, for this type of mechanism, it cannot realize the pure rotation output of the adjustment ring, that is, when it rotates around a certain axis, it will inevitably produce accompanying movement, so its coupling is strong, the motion solution is more complicated, and the control is also more complicated; Many S pairs that are difficult to process make the manufacturing cost increase

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