Rotary thrust vectoring nozzle for short-distance vertical take-off and landing engine

A technology of vertical take-off and landing and thrust vectoring, applied in the aviation field, can solve the problem of increasing the difficulty of nozzle design, and achieve the effect of scientific nozzle profile design, complete mechanical structure, and guaranteed accuracy

Inactive Publication Date: 2014-07-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These special combat technical indicators have greatly increased the design difficulty of this type of nozzle

Method used

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  • Rotary thrust vectoring nozzle for short-distance vertical take-off and landing engine
  • Rotary thrust vectoring nozzle for short-distance vertical take-off and landing engine
  • Rotary thrust vectoring nozzle for short-distance vertical take-off and landing engine

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Experimental program
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Effect test

Embodiment approach

[0020] Specific implementation: Relying on the jetcat small turbojet engine test bench, the size of each section of the rotary thrust vectoring nozzle is designed with reference to the jetcat original nozzle size design, and the bearings are standard deep groove ball bearings. The rotating cylinder of the first section of the nozzle adopts the law of uniform speed control, and the rotation range is 0-95°. From this, the maximum deflection vector angle of the nozzle is α=95°, and β=90-α / 4=66.25°. Due to the non-linear rotation angle law between the three sections of the barrel, the second and third sections of the nozzle adopt the variable speed control law.

[0021] figure 2 Among them, start the first, second and third motors 12, 14, 16 simultaneously, the first motor 12 drives the first driving gear 13 to rotate, and the first transmission gear 4 meshes with the first driving gear 13, because the first transmission gear 4 and the first driving gear 13 are in mesh with each ...

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Abstract

The invention discloses a rotary thrust vectoring nozzle for a short-distance vertical take-off and landing engine. By the adoption of the rotary thrust vectoring nozzle for the short-distance vertical take-off and landing engine, mode conversion between a cruising state and a short-distance vertical take-off and landing state, according to the cruising state, a spray pipe is located at a horizontal position, and according to the short-distance vertical take-off and landing state, the spray pipe is in a vertical position or deviates downwards by other angles can be completed accurately and efficiently. Profile design and structural design are conducted on the rotary spray pipe based on the vector requirements of the engine used by a vertical take-off and landing aircraft, parts can be replaced, the structure is simple, and machining is convenient. A gear transmission scheme that three spray pipe sections are driven respectively is adopted, and the nonlinear variation tendency between the deflection angle of the first spray pipe section and the deflection angle of the second spray pipe section can be achieved easily; a bearing type transitional connection structure is adopted, abrasion between two cylinder sections which move relatively can be reduced, and thus the spray pipe can operate more quickly and more efficiently.

Description

[0001] The invention belongs to the aviation field, and is particularly suitable for the thrust vectoring nozzle used for a short-distance vertical take-off and landing aircraft engine, the experimental verification of a small-scale short-distance vertical take-off and landing aircraft, and other aviation fields. Background technique: [0002] The British "Harrier" fighter was born and played a huge role on the battlefield, which made the fighter with short vertical take-off and landing capability receive continuous attention from various military powers. At present, in addition to the "Harrier" fighter, typical fighters with short-distance vertical take-off and landing functions include the Yak141 of the former Soviet Union and the F35B of the United States. The innovative design of the -35B short-range vertical take-off and landing fighter and its potential future military use and deterrence have injected new vitality into the development of this technology. It can be said th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/78
Inventor 刘帅王占学程稳周莉孙啸林
Owner NORTHWESTERN POLYTECHNICAL UNIV
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