Limiting method for mechanical area limit of double-ring control axisymmetric convergent-divergent nozzle
A double-loop control, axisymmetric technology, applied in the direction of machines/engines, jet propulsion devices, etc., to avoid extrusion damage, improve reliability and engine safety
Active Publication Date: 2022-02-08
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
For this reason, it is necessary to design a method for limiting the mechanical area limit of the axisymmetric retractable nozzle suitable for double-loop control, so as to avoid the risk of extrusion damage to the movement mechanism of the nozzle expansion section due to the abnormal operation of the hydraulic actuation system, and to improve the nozzle. Structural reliability and engine safety
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[0025] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...
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The invention belongs to the field of aero-engine nozzles, and relates to a limiting method for the mechanical area limit of a double-ring control axisymmetric convergent-divergent nozzle. The method comprises the steps that: an adjusting ring limiting piece is arranged on the inner wall face of an outlet area adjusting ring of the nozzle, the front end of the outlet area adjusting ring is connected with an A9 hydraulic actuator cylinder A, a maximum area limiting piece is arranged at the front end of the outer wall face of a throat area adjusting ring, and a minimum area limiting piece is arranged at the rear end of the outer wall face of the throat area adjusting ring; when the throat diameter D8 and the outlet diameter D9 of the nozzle are minimum, the adjusting ring limiting piece on the outlet area adjusting ring and the minimum area limiting piece on the throat area adjusting ring act, so that the A9 hydraulic actuator cylinder A stops stretching out, and the outlet area adjusting ring is prevented from continuing to move; and when the throat diameter D8 and the outlet diameter D9 of the nozzle are maximum, the adjusting ring limiting piece on the outlet area adjusting ring and the maximum area limiting piece on the throat area adjusting ring act, so that the A9 hydraulic actuator cylinder A stops retracting, and the outlet area adjusting ring is prevented from continuing to move.
Description
technical field [0001] The application belongs to the field of aero-engine nozzles, and in particular relates to a method for limiting the mechanical area limit of a double-loop control axisymmetric contraction and expansion nozzle. Background technique [0002] As a typical nozzle form of aero-engine, the axisymmetric nozzle whose throat and outlet area can be actively adjusted is favored by aero-engine designers all over the world because of its good aerodynamic performance. With the development of aero-engine technology, the thrust required by the engine is increasing. As an important factor in the performance of aero-engines, the adjustment range of the nozzle throat and outlet area is becoming wider and wider. The nozzle throat and outlet area are controlled by hydraulic pressure. For the cylinder drive, due to the complex control logic of the hydraulic actuator, there are abnormal risks such as overshooting, which will lead to failures such as breakage or cracks in the...
Claims
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IPC IPC(8): F02K1/15
CPCF02K1/15
Inventor 徐速赵春生
Owner AECC SHENYANG ENGINE RES INST