阅读说明：本技术 一种波纹管结构的机械式矢量喷管 (A kind of mechanical vector spray of bellows structure ) 是由 孟钰博 史经纬 王占学 周莉 张晓博 林志富 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种波纹管结构的机械式矢量喷管,属于航空发动机领域；包括等值段、波纹管段、收敛段、拉杆、定位片,等值段入口为高温涡轮出口面,等值段出口与波纹管段入口连接,波纹管段出口与收敛段入口连接,拉杆一端与波纹管段连接,等值段与收敛段通过定位片连接,等值段、波纹管段、收敛段管壁均有夹缝通道。应用本发明技术方案的机械矢量喷管结构,通过对拉杆施力使密封的波纹管段弯曲,能够保证喷管具有很高的推力矢量性能,解决了现有技术中机械矢量喷管存在漏气损失的问题；通过在管壁内的夹缝通道通入冷却气体降低壁面温度,能够保证喷管的高隐身性能。(The invention discloses a kind of mechanical vector sprays of bellows structure, belong to aero-engine field；Including equivalent section, bellows piece, converging portion, pull rod, locating plate, equivalent section entrance is high-temperature turbine exit face, equivalent section outlet is connect with bellows piece entrance, bellows piece outlet is connect with converging portion entrance, pull rod one end is connect with bellows piece, equivalent section is connect with converging portion by locating plate, and equivalent section, bellows piece, converging portion tube wall have crack channel.It can guarantee that jet pipe has very high thrust vectoring performance by being bent the bellows piece of sealing pull rod force using the mechanical vector spray structure of technical solution of the present invention, solve the problems, such as that there are air losses for mechanical vector spray in the prior art；Being passed through cooling gas by the crack channel in tube wall reduces wall surface temperature, can guarantee the high Stealth Fighter of jet pipe.)

1. a kind of mechanical vector spray of bellows structure, it is characterised in that: including equivalent section, bellows piece, converging portion, drawing Bar and positioning device；The equivalence section is isometrical cylindrical structure, and outlet end is provided with ring flange；The bellows piece is flexibility Bellows structure, radial section are circle, and both ends are isometrical with the equivalent section and are provided with ring flange；The converging portion is The outlet of conical tube structure, arrival end and bellows piece is isometrical and is provided with ring flange, and outlet end diameter is less than arrival end Diameter；The equivalence section, bellows piece pass sequentially through ring flange with converging portion and are fixedly connected, and tube wall is double-layer structure, In Crack channel is formed between double-layer tube wall, the crack channel of the equivalence section, bellows piece and converging portion is sequentially communicated；It is described etc. The ring flange for being worth section and converging portion is hinged by the positioning device；

One end of two pull rods is hinged with the lower edges ball of bellows piece outlet(discharge) flange disk respectively, and the other end is certainly By holding；By the free end applied force to the pull rod, the bending state of the bellows piece is adjusted, jet pipe is further realized and pushes away Force vector variation.

2. the mechanical vector spray of bellows structure according to claim 1, it is characterised in that: the positioning device is by four A locating plate is symmetrical arranged forms two-by-two, is installed on the periphery of the bellows piece；One end of two locating plates is symmetrically fixed on It is described equivalence section outlet(discharge) flange disk opposite edge, one end of another two locating plate be symmetrically fixed on the converging portion as The opposite edge of mouth ring flange；It is fixed on the other end of two locating plates of equivalent section outlet(discharge) flange disk respectively and is fixed on receipts The other end for holding back two locating plates of section inlet flange disk is hinged.

3. the mechanical vector spray of bellows structure according to claim 2, it is characterised in that: four locating plates two Two be one group, hinged by positioning pin between every group of two locating plates.

4. the mechanical vector spray of bellows structure according to claim 1, it is characterised in that: the outlet of the equivalence section Between ring flange and the inlet flange disk of the bellows piece, the outlet(discharge) flange disk of the bellows piece and entering for the converging portion It is bolted between mouth ring flange.

5. the mechanical vector spray of bellows structure according to claim 1, it is characterised in that: the equivalence section, ripple It is fixed between pipeline section and the double-layer tube wall of converging portion by spaced stiffening plate.

Technical field

The invention belongs to aero-engine fields, and in particular to a kind of mechanical vector spray of bellows structure.

Background technique

With the continuous improvement of modern Aviation military technology, the living environment of opportunity of combat is worsening.In order in all kinds of skies It gets the mastery in war, improve survival rate, more stringent requirements are proposed to aeroplane performance, and therefore Thrust Vectoring Technology also becomes must not One of the key technology that can lack.Aircraft can not only greatly improve mobility and agility using Thrust Vectoring Technology, can be with The stealth capabilities for reducing infra-red radiation, improving aircraft, to be obviously improved air combat efficiency and survival ability.Thrust-vectoring Nozzle one As can be divided into mechanical and two kinds of pneumatic type, fluidic vectoring nozzle is still in conceptual phase at present, and mechanical thrust vectoring sprays Pipe has been transferred to the engineer application stage.

A kind of dual vector nozzle throat area control mechanism of patent of invention 201811536610.8 and dual vector jet pipe, Use mechanical vector spray wall surface leakproofness it is poor, air loss causes nozzle performance to decline, and the actuating system used compared with For complexity, jet pipe weight is caused to rise, engine thrust-weight ratio decline.

Summary of the invention

Technical problems to be solved:

In order to avoid the shortcomings of the prior art, the present invention proposes a kind of mechanical vector spray of bellows structure, Using the flexible deformable of bellows and the feature of good airproof performance, to solve mechanical vector spray wall surface sealing in the prior art Poor, effort formation complexity the problem of property.

The technical scheme is that a kind of mechanical vector spray of bellows structure, it is characterised in that: including equivalence Section, bellows piece, converging portion, pull rod and positioning device；The equivalence section is isometrical cylindrical structure, and outlet end is provided with flange Disk；The bellows piece is flexible bellow structure, and radial section is circle, and both ends are isometrical with the equivalent section and are respectively provided with There is ring flange；The converging portion is conical tube structure, and the outlet of arrival end and bellows piece is isometrical and is provided with ring flange, Outlet end diameter is less than arrival end diameter；The equivalence section, bellows piece pass sequentially through ring flange with converging portion and are fixedly connected, Tube wall is double-layer structure, and crack channel, the crack of the equivalence section, bellows piece and converging portion are formed between double-layer tube wall Channel is sequentially communicated；The ring flange of the equivalence section and converging portion is hinged by the positioning device；

One end of two pull rods is hinged with the lower edges ball of bellows piece outlet(discharge) flange disk respectively, and the other end is equal For free end；By the free end applied force to the pull rod, the bending state of the bellows piece is adjusted, further realizes spray The variation of pipe thrust vectoring.

It forms, pacifies a further technical solution of the present invention is: the positioning device is symmetrical arranged two-by-two by four locating plates Periphery loaded on the bellows piece；One end of two locating plates is symmetrically fixed on the opposite of the outlet(discharge) flange disk of the equivalent section Edge, one end of another two locating plate be symmetrically fixed on the converging portion as mouth ring flange opposite edge；It is fixed on The other end of two locating plates of equivalent section outlet(discharge) flange disk respectively and is fixed on two locating plates of converging portion inlet flange disk The other end it is hinged.

A further technical solution of the present invention is: four locating plates are one group two-by-two, every group of two locating plates it Between by positioning pin it is hinged.

A further technical solution of the present invention is: the outlet(discharge) flange disk of the equivalence section and the entrance method of the bellows piece It is bolted between blue disk, between the outlet(discharge) flange disk of the bellows piece and the inlet flange disk of the converging portion.

A further technical solution of the present invention is: leading between the equivalence section, bellows piece and the double-layer tube wall of converging portion The stiffening plate of super-interval setting is fixed.

Beneficial effect

The beneficial effects of the present invention are: using the mechanical vector spray of the bellows structure of technical solution of the present invention, Flexible deformable feature based on bellows can be realized the variation of nozzle thrust vector, bellows wall surface by pull rod applied force Good airproof performance, there is no mechanical vector sprays in the prior art there are problems that air loss on jet pipe wall surface；And gas It can be realized jet pipe wall cooling by the crack channel in jet pipe wall surface, further decrease infrared intensity, enhance stealthy Performance；Jet pipe actuating system structure is simple, light weight, can guarantee higher thrust ratio；Difficult point of the invention is, by bellows Structure is combined with aero-engine nozzle structure, to realize the thrust vectoring performance of jet pipe.

Jet pipe is in horizontality under normal circumstances, and Thrust vector angle zero, when pull rod is by external force, jet pipe becomes being bent State, Thrust vector angle increase, and maximum angle is related with bellows piece length, when bellows piece length long enough, thrust arrow Angulation can be greater than 90 degree.

Detailed description of the invention

Fig. 1 is optional a kind of structural representation of the mechanical vector spray of bellows structure according to embodiments of the present invention Figure；

Fig. 2 is optional a kind of side of the mechanical vector spray horizontality of bellows structure according to embodiments of the present invention View；

Fig. 3 is optional a kind of side of the mechanical vector spray angle state of bellows structure according to embodiments of the present invention View；

Fig. 4 is a kind of the vertical of optional mechanical vector spray horizontality of bellows structure according to embodiments of the present invention To sectional view；

Fig. 5 is optional a kind of wave of the mechanical vector spray angle state of bellows structure according to embodiments of the present invention Line pipeline section partial enlarged view；

Description of symbols: 1, equivalent section；2, bellows piece；3, converging portion；4, pull rod；5, locating plate；6, positioning pin；7, Equivalent section outlet(discharge) flange disk；8, bellows piece inlet flange disk；9, bellows piece outlet(discharge) flange disk；10, converging portion section entrance method Blue disk；11, bolt；12, nut；13, upper connecting rod；14, lower pull rod；15, pull rod connector；16, equivalent section crack channel；17, Bellows piece bellows；18, converging portion crack channel.

Specific embodiment

The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to be used to explain the present invention, and cannot understand For limitation of the present invention.

In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", etc. refer to The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplifies Description, rather than the device or element of indication or suggestion meaning must have a particular orientation, constructed and grasped with specific orientation Make, therefore is not considered as limiting the invention.

The mechanical vector spray of bellows structure according to an embodiment of the present invention, as shown in Figure 1, comprising: equivalent section 1, Bellows piece 2, converging portion 3, pull rod 4, locating plate 5, positioning pin 6, equivalent 1 entrance of section are high-temperature turbine exit face, and equivalent section 1 goes out Mouth is connect with 2 entrance of bellows piece, and the outlet of bellows piece 2 is connect with 3 entrance of converging portion, and 4 one end of pull rod and bellows piece 2 connect It connects, the other end is free, and equivalent section 1 is hinged by locating plate 5 with converging portion 3, and two locating plates 5 in one group pass through positioning pin 6 Hingedly.

Using the mechanical vector spray of the bellows structure of technical solution of the present invention, the flexible deformable based on bellows Feature can be realized the variation of nozzle thrust vector by 4 applied force of pull rod, and existing skill is not present in bellows wall surface good airproof performance In art there is air loss in mechanical vector spray on jet pipe wall surface, and cooling gas passes through the crack in jet pipe wall surface Channel can be realized jet pipe wall cooling, further decrease infrared intensity, enhance Stealth Fighter.

Specifically, the entrance of equivalent section 1 is circular cross-section, and equivalent section 1 is area and the constant straight tube of shape, equivalent section There is flange plate structure in 1 outlet.

2 cross sectional shape of bellows piece is circle, and tube wall is deformable flexible bellows structure, and 2 entrance of bellows piece goes out Mouth has a flange plate structure, and there are two the pull rod connector 15 that position is symmetrical above and below, bellowss on bellows piece outlet(discharge) flange disk 9 Section inlet flange disk 8 is connect with equivalent section outlet(discharge) flange disk 7 by 11 nut 12 of bolt, ripple tube inlet circular cross-section and equivalence Section outlet circular cross-section docking.

Converging portion 3 is circular section shape, the convergent straight tube of area, and 3 entrance of converging portion has flange plate structure, and converging portion enters Mouth ring flange 10 is connect with bellows piece outlet(discharge) flange disk 9 by 11 nut 12 of bolt, 3 entrance circular cross-section of converging portion and ripple Pipeline section 2 exports circular cross-section docking.

Pull rod 4 is divided into upper connecting rod 13 and lower pull rod 14 according to position, and for 4 free end of pull rod for applying external force, pull rod 4 is another End is connect with the pull rod connector 15 on bellows piece outlet(discharge) flange disk 9.

Four pieces locating plate 5 two are one group, and two locating plates 5 and 10 two sides of converging portion inlet flange disk pass through 11 spiral shell of bolt Mother 12 connects, and another two locating plate 5 is connect with equivalent 7 two sides of section outlet(discharge) flange disk by 11 nut 12 of bolt, two side positions pair The locating plate 5 answered is connected by positioning pin 6.

As shown in Fig. 2, jet pipe is in horizontality, Thrust vector angle zero when pull rod 4 is not by external force.

As shown in figure 3, when upper connecting rod 13 by thrust, lower pull rod 14 by pulling force when, jet pipe is in bending state, thrust vectoring Angle is increased clockwise by zero, and maximum angle is related with 2 length of bellows piece, and maximum angle is 60 degree in example, when bellows piece 2 When length long enough, Thrust vector angle can be greater than 90 degree, and jet pipe wall surface blocks turbine high-temperature wall surface under bending state, reduce red External radiation intensity enhances Stealth Fighter.

As shown in figure 4, equivalent section 1, bellows piece 2, converging portion 3 are double-layer tube wall structure, formed between double-layer tube wall Crack channel, 16 entrance of equivalent section crack channel are passed through cooling gas, the outlet of equivalent section crack channel 16 and bellows piece crack The docking of 17 entrance of channel, the outlet of bellows piece crack channel 17 are docked with 18 entrance of converging portion crack channel, and converging portion crack is logical The outlet of road 18 sprays cooling gas, and the cooling gas and mainstream gas of ejection blend, and shortens wake flame length, cooling gas is in crack It flows in channel, is dropped at a temperature of jet pipe wall surface, reduce the infra-red radiation of jet pipe wake flame and wall surface, enhance Stealth Fighter.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.