Duct switching mechanism for three-duct intermediate case of variable-cycle aero-engine
A technology of aero-engine and conversion mechanism, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of heavy burden, low efficiency, and motion deviation of the engine control system
Active Publication Date: 2022-05-03
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0004]
1) It is a multi-actuator direct-push structure. In order to obtain a larger driving force, it is necessary to design a large number of actuators, which has a large weight and a large burden on the engine control system, and the drive between each actuator There is a difference in force, and when synchronously driven, the internal friction is large and the efficiency is low;
[0005]
2) Through the axial movement of the linkage ring, multiple pull rods on the linkage ring drive each duct switching valve to move. The linkage ring and the casing are constrained by friction pairs, and there is a gap between them, which is prone to occur when the linkage ring moves axially. Motion deviation, resulting in poor synchronization of each duct conversion valve, and even stuck
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[0056] In order to make the technical solution of the present application and its advantages clearer, the technical solution of the present application will be further clearly and completely described in detail below in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only part of the application Examples are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, and other relevant parts can refer to the general design. In the case of no conflict, the embodiments in the application and the technologies in the embodiments Features can be combined with each other to obtain new embodiments.
[0057]In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the application shall have the usual meanings unde...
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The invention relates to a variable-cycle aero-engine three-duct intermediate case duct switching mechanism, which is characterized in that actuating cylinders arranged outside an outer case drive actuating arms to swing and drive a driving shaft to rotate so as to drive rocker arms connected with the driving shaft to swing and drive a linkage ring to move in the circumferential direction and the axial direction of an intermediate case, so that each rocker arm swings; and each connecting rod is driven to act, so that the duct conversion valve plate rotates towards a closing position or an opening position around the hinged part of the duct conversion valve plate and the middle casing, and the flow of the inner duct and the outer duct is distributed and adjusted.
Description
technical field [0001] The application belongs to the technical field of design of a three-duct intermediary case duct conversion mechanism for a variable-cycle aero-engine, and specifically relates to a three-duct intermediary case duct conversion mechanism for a variable-cycle aero-engine. Background technique [0002] Most of the intermediate casings of variable cycle aero-engines are double-ducted casings, including the inner duct and the outer duct. Adapt to different flight states of the aircraft, so that the aero-engine can maintain better performance. [0003] In order to obtain a more flexible pneumatic adjustment capability, a third duct is added on the basis of the double duct of the intermediate case, which is a three-duct case. For the three-duct intermediary case, the current double-duct case is directly used The duct conversion mechanism has the following defects in this technical solution: [0004] 1) It is a multi-actuator direct-push structure. In order t...
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IPC IPC(8): F02K3/04F02K3/077F01D25/24
CPCF02K3/04F02K3/077F01D25/24Y02T10/12
Inventor 阎深李天豪张弛
Owner AECC SHENYANG ENGINE RES INST