Novel axial-symmetry convergence and expansion spray pipe using single actuation system

Abstract

The invention provides a novel axial-symmetry convergence and expansion spray pipe using a single actuation system. The novel axial-symmetry convergence and expansion spray pipe mainly comprises a cylinder body (1), an actuation cylinder (2), a pull rod (4), a convergence adjustment plate (5), an expansion adjustment plate (6), a support (7), an outer cover (8), an expansion sealing plate (9), a thin-wall rotational flow center body (10), a support (11) and a convergence sealing plate (12). The cylinder body (1) serves as a supporting component of the whole spray pipe. The actuation cylinder (2), the pull rod (4) and the convergence adjustment plate (5) serve as a throat area adjustment mechanism and also drive the expansion adjustment plate (6) to move, so that an outlet area changes according to a fixed rule. The thin-wall rotational flow center body (10) is used for shielding a front-end component. The novel axial-symmetry convergence and expansion spray pipe has the advantages that adjustment of the throat area and the outlet area is realized through the single actuation system, the spray pipe is good in invisibility on the premise that the adjustment range of the throat area is not affected, and the spray pipe is simple in structure and high in reliability.

Description

technical field [0001] The invention belongs to the field of aero-engine nozzles, and relates to a novel single-action system axisymmetric retractable nozzle, and is also applicable to the field of engine nozzles in need. Background technique [0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric retractable nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability. At the same time, the outlet area of ​​the traditional axisymmetric retractable nozzle is adjusted individually or by air pressure balance. The axially symmetrical retractable nozzle whose outlet area is individually adjusted needs to add an independent actuation system, resulting in increased weight and control rules. Complicated, but the outlet area of ​​the axisymmetric shrinking and expanding nozzle adjusted by the air pressure balance is greatly affected by the aerodynamic load and is basically uncontrollable. The traditi...

AI Technical Summary

Problems solved by technology

[0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric retractable nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability

At the same time, the outlet area of ​​the traditional axisymmetric retractable nozzle is adjusted individually or by air pressure balance. The axially symmetrical retractable nozzle whose outlet area is individually adjusted needs to add an independent actuation system, resulting in increased weight and control rules. Complicated, but the outlet area of ​​the axisymmetric shrinking and expanding nozzle adjusted by the air pressure balance is greatly affected by the aerodynamic load and is basically uncontrollable

The traditional plug-type axisymmetric retractable nozzle only adds a closed center body in the center of the nozzle, but due to the large cross-sectional area of ​​the closed center body, it seriously affects the adjustment range of the throat area of ​​the nozzle, which affects the engine. working point

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