CN103912386B - A kind of synchronous ring mechanism of variable cycle engine mode switching valve - Google Patents
A kind of synchronous ring mechanism of variable cycle engine mode switching valve Download PDFInfo
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Abstract
The present invention relates to the synchronous ring mechanism of a kind of variable cycle engine mode switching valve, patten transformation valve system, for changing engine behavior to adapt to different flying conditions, belongs to the high-performance gas turbogenerator technical field in aeronautical and space technology.Mode switching valve is positioned at outside electromotor and contains import, and it includes outer casing leading portion, outer casing back segment, valve sheet, ring of obturaging, connecting rod, synchronous ring, front envelope mechanism of qi casket, rear envelope mechanism of qi casket, synchronous ring guide rail, pressurized strut, synchronous ring guide groove etc..Present invention is generally directed to synchronous ring therein carry out, synchronous ring is along electromotor axially-movable under the promotion of pressurized strut, and its motion matches with outer casing leading portion.The invention provides synchronous ring structure scheme four kinds different, all can realize its motor function.
Description
Technical field
The present invention relates to the synchronous ring mechanism of a kind of variable cycle engine mode switching valve, synchronous ring can drive other parts to move along the axially-movable of electromotor, thus changing engine behavior to adapt to different flying conditions, belong to the high-performance gas turbogenerator technical field in aeronautical and space technology.
Background technology
Variable cycle engine is a kind of propulsion system with outstanding combination property, it is in the supersonic performance of turbojet engine and the subsonic speed performance synthesis of fanjet to electromotor, compare with traditional little Bypass Ratio Turbofan Engine, variable cycle engine, when completing more difficult hybrid task, performance demonstrates huge potentiality.
Modern typical variable cycle jet engine adjustable mechanism mainly includes three parts: mode switching valve, front duct ejector and rear culvert channel injector.Wherein mode switching valve is positioned at outer culvert import, plays the effect opening and closing by-pass air duct together with rear culvert channel injector；After front duct ejector is arranged in main duct core driving fan, before high-pressure compressor, it is possible to part intension air-flow injection again is entered outer culvert, plays the effect improving inlet fan surge margin；Rear culvert channel injector is outer after being positioned at turbine contains exit, both can play together with mode switching valve and regulate the outer effect containing flow, participate in afterbunring, play the effect of blender in the core air-flow also can discharged by outer culvert airflow injection to turbine.
It can thus be appreciated that mode switching valve is one of critical piece of variable cycle engine, mode switching valve is made up of outer casing leading portion, outer casing back segment, valve sheet, ring of obturaging, connecting rod, synchronous ring, front envelope mechanism of qi casket, rear envelope mechanism of qi casket, synchronous ring guide rail, pressurized strut, synchronous ring guide groove etc..Its operation principle is that pressurized strut drives synchronous ring axially-movable, and synchronous ring drives some valve sheets motion circumferentially, and then changes bypass ratio, it is achieved the change circulatory function of electromotor.
In mode switching valve, synchronous ring is the critical component in structure, synchronous ring subjects the power of pressurized strut outside, it is connected to several connecting rods interior, and then it being connected to valve sheet, synchronous ring entirety also to coordinate with outer casing, along electromotor axially-movable, therefore, the structural design of synchronous ring is particularly critical.
US Patent No. Patent5048286 proposed the mechanism of a kind of mode switching valve in 1991.In the structure shown here, synchronous ring is arranged on outside casing, and the motion mode of synchronous ring is for circumferentially rotating, and then drivening rod motion, and connecting rod drives valve sheet to rotate, thus realizing regulatory function.This structure can ensure that the synchronicity of link motion so that the uniform force of connecting rod and valve sheet, but its shortcoming is Impact direction complexity, and design difficulty is big.
Summary of the invention
Present invention solves the technical problem that and be: overcome the deficiencies in the prior art, it is provided that the synchronous ring mechanism in a kind of variable cycle engine mode switching valve, change the shortcoming that existing structure frictional force is big, improve its performance.
The technical solution of the present invention is: the synchronous ring mechanism of a kind of variable cycle engine mode switching valve, including synchronous ring, synchronous ring guide rail and several synchronous ring guide grooves；Synchronous ring is be installed on the annulus that cross section is I-shaped outside outer casing leading portion, and synchronous ring internal circumferential arranges several synchronous ring guide grooves, and synchronous ring guide groove coordinates installation with synchronous ring guide rail, thus ensureing that synchronous ring is along engine axis direction slide anteroposterior.Synchronous ring design includes roller type, line ball-type, column ball-type, linear bearing are directly embedded into four kinds of structures of formula.
The scroll wheel structure of described synchronous ring, including: roller type synchronous ring guide groove, outer casing roller raceway, axle, bearing, bearing protecting jacket, back-up ring, screw.Axle is fixed on roller type synchronous ring guide groove by screw, every axle is provided with bearing and is positioned by back-up ring, and outer race only can roll in casing roller raceway outside.Circumferentially displaced in order to limits synchronization ring, it is surrounded by protection set outside outer race, in order to protect outer race in rolling process.
The line ball-type structure of described synchronous ring, including: line ball-type synchronous ring guide groove, line ball road, ball retainer, backing plate, ball, bolt, nut.By screw bolt and nut, ball retainer and backing plate are fixed in line ball-type synchronous ring guide groove；Ball is arranged on ball retainer and backing plate matches in the ring raceway formed；Ball moves in line ball road.
The column ball-type structure of described synchronous ring, including: column ball-type synchronous ring guide groove, column ball road, one side ball rack, two-sided ball rack, ball, bolt, nut.By screw bolt and nut, one side ball rack and two-sided ball rack are fixed in column ball-type synchronous ring guide groove；Ball is arranged on adjacent two ball racks and matches in the ring raceway formed；Ball moves in column ball road.
The linear bearing of described synchronous ring is directly embedded into formula synchronous ring structure, including: bearing guide groove, finished product linear bearing, bearing cap, bearing guide, screw.Finished product linear bearing is arranged in bearing guide groove and by bearing cap and screw location；Bearing guide is arranged on outer casing leading portion.Linear bearing outer ring and bearing guide groove interference fit, linear bearing ball moves on bearing guide.
Present invention advantage compared with prior art is in that:
(1) the synchronous ring guide rail that the present invention is directed on four guide grooves of synchronous ring internal circumferential layout and casing carries out multi-scheme design, all valve sheet synchronous axial system can be made in the course of the work, changing the shortcoming that existing structure frictional force is big, stability and reliability is higher.
(2) rolling friction that motion is roller of the synchronous ring of scroll wheel structure in the present invention, frictional force is less.Process easy for installation simultaneously.
(3) rolling friction that motion is ball of line ball-type synchronous ring in the present invention, on the less synchronous ring cross section of frictional force, only ball is arranged in distribution one, and structural thickness is less, it is possible to adapt to less installing space.
(4) rolling friction that motion is ball of column ball-type synchronous ring in the present invention, frictional force is less；Structure is easy to process, it is possible to by one side ball rack and two-sided ball rack separate machined, is combined installing.
(5) cathetus bearing of the present invention is directly embedded into the rolling friction that motion is ball of formula synchronous ring, and frictional force is less；Linear bearing is finished product structure, easy for installation.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram (cross section, connecting rod place) of mode switching valve；
Fig. 2 is mode switching valve partial 3 d figure；
Fig. 3 is roller type synchronous ring assembling schematic diagram；
Fig. 4 is that roller type synchronizes annulate shaft schematic diagram, and wherein (a) is the plane graph of axle, and (b) is graphics；
Fig. 5 is the schematic diagram of the bearing with protection set；
Fig. 6 is line ball-type synchronous ring assembling schematic diagram；
Fig. 7 is line ball-type synchronous ring ball retainer schematic diagram, and wherein (a) is to maintain the plane graph of frame, and (b) is graphics；
Fig. 8 is line ball-type synchronous ring backing plate schematic diagram, and wherein (a) is the plane graph of backing plate, and (b) is graphics；
Fig. 9 is column ball-type synchronous ring assembling schematic diagram；
Figure 10 is column ball-type synchronous ring one side ball rack schematic diagram, and wherein (a) is the plane graph of one side ball rack, and (b) is graphics；
Figure 11 is the two-sided ball rack schematic diagram of column ball-type synchronous ring, and wherein (a) is the front view of two-sided ball rack, and (b) is top view, and (c) is graphics；
Figure 12 is that linear bearing is directly embedded into formula synchronous ring two dimension installation diagram；
Figure 13 is that linear bearing is directly embedded into formula synchronous ring partial 3 d figure；
In figure, numerical reference illustrates as follows:
1. outer casing leading portion；2. outer casing back segment；3. valve sheet；4. obturage ring；5. connecting rod；6. synchronous ring；7. before, seal mechanism of qi casket；8. after, seal mechanism of qi casket；9. synchronous ring guide rail；10. pressurized strut；11. synchronous ring guide groove；
A-1. roller type synchronous ring guide groove；A-2. outer casing roller raceway；A-3. axle；A-4. bearing；A-5. bearing protecting jacket；A-6. back-up ring；A-7. screw.B-1. line ball-type synchronous ring guide groove；B-2. line ball road；B-3 ball retainer；B-4 backing plate；B-5 ball；B-6 bolt；B-7 nut.C-1. column ball-type synchronous ring guide groove；C-2 column ball road；C-3. one side ball rack；C-4. two-sided ball rack；C-5. ball；C-6. bolt；C-7 nut.D-1. bearing guide groove；D-2. finished product linear bearing；D-3. bearing cap；D-4. bearing guide；D-5. screw.
Detailed description of the invention
Present invention is generally directed to the synchronous ring mechanism of existing variable cycle engine mode switching valve and carry out multi-scheme design, the structure of present mode switching valve and synchronous ring location be as shown in Figure 1, 2: mode switching valve is positioned at outside electromotor and contains import, it by: outer casing leading portion 1, outer casing back segment 2, valve sheet 3, ring 4 of obturaging, connecting rod 5, synchronous ring 6, front envelope mechanism of qi casket 7, rear envelope mechanism of qi casket 8, synchronous ring guide rail 9, pressurized strut 10, synchronous ring guide groove 11 etc. form.
The way of realization of overall structure function is: pressurized strut 10 is arranged on outer casing back segment 2, by Precise Control of Oil pressure, make pressurized strut slide bar movable in pressurized strut, and then drive synchronous ring 6 to move, the athletic meeting of synchronous ring 6 drives the motion with its hinged connecting rod 5, and then drives the valve sheet 3 with rod hinge connection to move, and valve sheet 3 will rotate with casing hinged place around it, when turning to corresponding position, it is achieved the opening and closing of by-pass air duct.Front envelope mechanism of qi casket 7, the rear design sealing mechanism of qi casket 8 are to ensure that outer culvert air-flow does not leak.
Synchronous ring 6 is overlap the annulus that cross section is I-shaped outside casing leading portion 1 outside, synchronous ring internal circumferential arranges 4 synchronous ring guide grooves 11, on outer casing leading portion 1, design has synchronous ring guide rail 9 simultaneously, during installation, synchronous ring 6 is overlapped outside on casing leading portion 1, synchronous ring guide groove 11 and synchronous ring guide rail 9 is made to coordinate, thus ensureing that synchronous ring can along synchronous ring guide rail slide anteroposterior.
The synchronous ring guide rail 9 that the present invention is directed on four synchronous ring guide grooves 11 of synchronous ring internal circumferential layout and casing carries out multi-scheme design.Change the shortcoming that existing structure frictional force is big, improve its performance.Four kinds of organization plans are roller type synchronous ring respectively, line ball-type synchronous ring, and column ball-type synchronous ring, linear bearing is directly embedded into formula synchronous ring.
1. the synchronous ring of scroll wheel structure:
It is the installation diagram of roller type synchronous ring as shown in Figure 3: roller type synchronous ring is made up of synchronous ring 6, roller type synchronous ring guide groove a-1, outer casing roller raceway a-2, axle a-3, bearing a-4, bearing protecting jacket a-5, back-up ring a-6, screw a-7.Roller bodies in the present invention is bearing a-3.
The annexation of each part of this structure is: axle a-3 is fixed on roller type synchronous ring guide groove a-1 by screw a-7, every axle is provided with bearing a-4 and is positioned by back-up ring a-6, and bearing outer ring only can roll in casing roller raceway a-2 outside.Circumferentially displaced in order to limits synchronization ring, it is surrounded by bearing protecting jacket a-5 outside bearing outer ring, in order to protect bearing outer ring in rolling process.
Two groups of roller devices of accommodated side-by-side in each roller type synchronous ring guide groove a-1.One group of roller devices includes one with axle a-3, two bearing a-4, two bearing protecting jacket a-5, two back-up ring a-6, two screw a-7.
The way of realization of overall structure function is: pressurized strut 10 promotes synchronous ring 6 axially-movable, and bearing a-4 outer ring rotates around axle a-3, and coordinates with outer casing roller raceway a-2, and then realizes the synchronous ring axially-movable along casing.
Described synchronous ring 6 main body is annulus part, and its cross section is I-shaped, and synchronous ring inner circumferential is uniformly distributed some roller type synchronous ring guide groove a-1, designs the geometry of guide groove according to the cooperation of axle and guide groove.
Described outer casing roller raceway a-2, determines the size of raceway, thus realizing the cooperation of bearing and raceway according to the size of bearing a-4.
It is that in axle a-3: Fig. 4, a figure is the plane graph of axle as shown in Figure 4；B figure is the graphics of axle.The intermediate portion cross-section of axle is circular, and the cross section of two end portions is regular hexagon.On middle circular shaft part, design has the shaft shoulder, positions for bearing；Design has groove, is used for laying back-up ring, thus limiting the axially-movable of bearing.Axle two end portions is positive six prisms, and the guide groove on three faces of six prisms and synchronous ring coordinates, and positions thus countershaft, limits it and rotates；Meanwhile, on a face of six prisms, design has screwed hole, it is possible to axle a-3 and synchronous ring 6 are fastened by screw a-7.
Be bearing a-4 and bearing protecting jacket a-5: bearing a-4 as shown in Figure 5 it is deep groove ball bearing, selects the model of bearing according to the size of synchronous ring upper rail.The inner ring of bearing a-4 and axle a-3 tight fit, positioned bearing a-4 by the shaft shoulder and back-up ring a-6.Described bearing protecting jacket a-5 is annulus part, designs the size of bearing protecting jacket according to the size of bearing a-4.For protecting bearing outer ring in rolling process.
Described back-up ring a-6 is circlip for shaft, selects the model of back-up ring according to the size of bearing.Back-up ring a-5 is arranged on axle a-3, the axially-movable of restriction bearing a-4.
Described screw a-7 is fluting tapered end holding screw, selects big footpath and the length of screw according to the size of axle head six prismatic surface.Screw is used for fastener shaft and synchronous ring.
2. the synchronous ring of line ball-type structure:
It is the installation diagram of line ball-type synchronous ring as shown in Figure 6: line ball-type synchronous ring is made up of synchronous ring 6, line ball-type synchronous ring guide groove b-1, line ball road b-2, ball retainer b-3, backing plate b-4, ball b-5, bolt b-6, nut b-7.
The annexation of each part of this structure is: be fixed in line ball-type synchronous ring guide groove b-1 by ball retainer b-3 and backing plate b-4 by bolt b-6 and nut b-7；Ball is arranged on ball retainer and backing plate matches in the ring raceway formed；Ball moves in line ball road.
Each line ball-type synchronous ring guide groove b-1 is distributed a ball retainer b-3, a backing plate b-4, and with bolt b-6 and nut b-7, synchronous ring 6 and ball retainer b-3, backing plate b-4 is coupled together.Being dispersed with ball in circulating line between ball retainer and backing plate, wherein have two row balls can expose a part, the line ball road b-2 on the part ball exposed and outer casing coordinates.
The way of realization of overall structure function is: pressurized strut 10 promotes synchronous ring 6 axially-movable, by ball b-5 rolling on line ball road b-2, realizes the synchronous ring axially-movable relative to casing.
Described synchronous ring 6 is annulus part, and its cross section is I-shaped, and synchronous ring inner circumferential is uniformly distributed some line ball-type synchronous ring guide groove b-1, designs the size of guide groove according to the size of ball retainer b-3 and backing plate b-4.Meanwhile, on guide groove, design has screwed hole, is used for and bolt b-6 coordinates.
Described line ball road b-2, determines the size of raceway according to the size of ball b-5, thus realizing the cooperation of ball and raceway.
It is the plane graph that in ball retainer b-3: Fig. 7, a figure is to maintain frame as shown in Figure 7；B figure is to maintain the graphics of frame.Ball retainer b-3 main body is cuboid, is designed with the line annular rolling ball track that left and right two circle is symmetrical；On retainer, design has screwed hole, is used for and bolt b-6 coordinates；Retainer lower surface design has the counterbore of circle, is used for installing nut b-6 so that nut does not expose the lower surface of retainer.
It is that in backing plate b-4: Fig. 8, a figure is the plane graph of backing plate as shown in Figure 8；B figure is the graphics of backing plate.The main body of backing plate is cuboid, and its basic size is identical with ball retainer b-3.Being designed with the annular rolling ball track that left and right two circle is symmetrical, when ball retainer b-3 and backing plate b-4 coordinates time, the annular rolling ball track on retainer and the annular rolling ball track on backing plate just cooperatively form two the symmetrical complete circulating lines in left and right.Backing plate is similarly designed with screwed hole, is used for and bolt b-6 coordinates.
Described ball b-5 is the moving person of this structure, in uniform two circulating lines being distributed in ball retainer b-3 and backing plate b-4 of ball, in the process of synchronous ring 6 motion, plays and rolls the effect reducing friction.
Described bolt b-6 is hexagon-headed bolt, is used for connecting synchronous ring 6, ball retainer b-3 and backing plate b-4.Its size and size are determined by the size of ball retainer and backing plate.
Described nut b-7 is hexagon thin nut, and nut is arranged in the counterbore of ball retainer lower surface, and matches with bolt b-6.
3. the synchronous ring of column ball-type structure:
It is the installation diagram of column ball-type synchronous ring as shown in Figure 9: column ball-type synchronous ring is made up of synchronous ring 6, column ball-type synchronous ring guide groove c-1, column ball road c-2, one side ball rack c-3, two-sided ball rack c-4, ball c-5, bolt c-6, nut c-7.
The annexation of each part of this structure is: be fixed in column ball-type synchronous ring guide groove c-1 by one side ball rack c-3 and two-sided ball rack c-4 by bolt c-6 and nut c-7；Ball c-5 is arranged on adjacent two ball racks and matches in the ring raceway formed；Ball moves on column ball road c-2.
Each column ball-type synchronous ring guide groove c-1 is distributed two two-sided ball rack c-4, two one side ball rack c-3, by two bolt c-6 and two nut c-7, ball rack and synchronous ring 6 is connected.Laying ball c-5 in the ring raceway that adjacent two ball racks are formed, have a line ball and expose a part, the column ball road c-2 on the part ball exposed and casing matches.
The way of realization of overall structure function is: pressurized strut 10 promotes synchronous ring 6 axially-movable, by ball c-5 rolling on column ball road c-2, realizes the synchronous ring axially-movable relative to casing.
Described synchronous ring 6 is annulus part, and its cross section is I-shaped, and synchronous ring inner circumferential is uniformly distributed some column ball-type synchronous ring guide groove c-1.Meanwhile, in synchronous ring, design has screwed hole, is used for and bolt c-6 coordinates.
Described column ball road c-2, determines the size of raceway, thus realizing the cooperation of ball and raceway according to the distance of the size of ball c-5 and adjacent two row balls.
Being that in one side ball rack c-3: Figure 10, a figure is the plane graph of one side ball rack as shown in Figure 10, b is the graphics of one side ball rack.The main body of one side ball rack c-3 is cuboid, and its basic size is determined by the guide groove in synchronous ring.It is designed with string annular rolling ball track.The hole of the middle part open loop shape of one side ball rack, chamfering is done in corner, is provided to alleviate weight.On ball rack, design has screwed hole, is used for and bolt c-6 coordinates；Around screwed hole design have boss, the material around boss by mill off in order to alleviate weight.
Being that in two-sided ball rack c-4: Figure 11, a figure is the front view of two-sided ball rack as shown in figure 11, b figure is top view, and c figure is graphics.The main body of two-sided ball rack c-4 is cuboid, its basic size is identical with one side ball rack c-3, the annular rolling ball track of column is all designed on the two sides, left and right of two-sided ball rack, when the ball rack of two-sided ball rack and the right and left matches, the annular rolling ball track on two ball racks just cooperatively forms a complete circulating line.Two-sided ball rack is similarly designed with screwed hole, is used for and bolt c-6 coordinates；The hole of same open loop shape in the middle part of it, chamfering is done in corner, designs boss around screwed hole, and the material around boss is removed, and is used for alleviating weight.
Described ball c-5 is the moving person of this structure, and ball c-5 is uniform to be distributed in the ring raceway that two retainers are formed, and in the process of synchronous ring 6 motion, plays and rolls the effect reducing friction.
Described bolt c-6 is hexagon-headed bolt, is used for connecting synchronous ring 6, one side ball rack c-3, two-sided ball rack c-4.Its size and size are determined by the size of column ball-type synchronous ring guide groove c-1.
Described nut c-7 is hexagon thin nut, coordinates with bolt c-6.
4. linear bearing is directly embedded into the synchronous ring of formula structure:
It is the linear bearing installation diagram that is directly embedded into formula synchronous ring as shown in Figure 12,13: linear bearing is directly embedded into formula synchronous ring and is made up of synchronous ring 6, bearing guide groove d-1, finished product linear bearing d-2, bearing cap d-3, bearing guide d-4, screw d-5.
The annexation of each part of this structure is: finished product linear bearing d-2 is arranged in bearing guide groove d-1 and by bearing cap d-3 and screw d-5 location；Bearing guide d-4 is arranged on outer casing leading portion 1.The outer ring of finished product linear bearing d-2 and bearing guide groove d-1 interference fit, linear bearing ball moves on bearing guide.
Linear bearing is directly embedded in formula synchronous ring in everywhere bearing guide groove d-1 axially distributed two finished product linear bearing d-2, a bearing cap d-3, four screw d-5, a bearing guide d-4.
The way of realization of overall structure function is: pressurized strut 10 promotes synchronous ring 6 axially-movable, and the bearing guide groove d-1 interference fit on the outer ring of finished product linear bearing d-2 and synchronous ring 6 is moved together；The motion on bearing guide d-4 of the linear bearing ball is relied on to realize the synchronous ring axially-movable along casing.
Described linear bearing d-2 is finished product structure.Being incorporated in synchronous ring structure by finished product linear bearing, in synchronous ring, design has bearing guide groove d-1, is arranged on bearing guide groove d-1 by finished product linear bearing d-2, and bearing guide d-4 is arranged on casing.Bearing cap d-3 and screw d-5 is used for the axially-movable of straight limit bearing.
Non-elaborated part of the present invention belongs to techniques well known.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here cannot all of embodiment be given exhaustive.Every belong to apparent change that technical scheme extended out or the variation row still in protection scope of the present invention.
Claims (1)
1. the synchronous ring mechanism of a variable cycle engine mode switching valve, it is characterised in that: include synchronous ring (6), synchronous ring guide rail (9) and several synchronous ring guide grooves (11)；Synchronous ring (6) is overlap the annulus that cross section is I-shaped of casing leading portion (1) outside outside, synchronous ring (6) internal circumferential arranges several synchronous ring guide grooves (11), several synchronous ring guide grooves (11) are enclosed within synchronous ring guide rail (9) when installing, thus ensureing that synchronous ring (6) edge is installed on synchronous ring guide rail (9) slide anteroposterior of outer casing leading portion (1)；
Described synchronous ring (6) is scroll wheel structure, including: roller type synchronous ring guide groove (a-1), outer casing roller raceway (a-2), axle (a-3), bearing (a-4), bearing protecting jacket (a-5), back-up ring (a-6), screw (a-7)；2 axles (a-3) are arranged on roller type synchronous ring guide groove (a-1), and every axle (a-3) above installs 2 bearings (a-4) and 2 back-up rings (a-6)；Bearing (a-4) is installed bearing protecting jacket (a-5) be used for protecting outer race；Fastener shaft (a-3) is carried out, the upper motion of the outer ring of bearing (a-4) casing roller raceway (a-2) outside by 2 screws (a-7)；
Or described synchronous ring (6) is line ball-type structure, including: line ball-type synchronous ring guide groove (b-1), line ball road (b-2), ball retainer (b-3), backing plate (b-4), ball (b-5), bolt (b-6), nut (b-7)；Ball (b-5) is arranged on ball retainer (b-3) and backing plate (b-4) matches in the ring raceway formed；In line ball-type synchronous ring guide groove (b-1), ball retainer (b-3), backing plate (b-4) and synchronous ring (6) being coupled together with 4 bolts (b-6) and 4 nuts (b-7), ball (b-5) is in the upper motion of line ball road (b-2)；
Or described synchronous ring (6) is column ball-type structure, including: column ball-type synchronous ring guide groove (c-1), column ball road (c-2), one side ball rack (c-3), two-sided ball rack (c-4), ball (c-5), bolt (c-6), nut (c-7)；Ball (c-5) is arranged on adjacent two ball racks and matches in the ring raceway formed；In column ball-type synchronous ring guide groove (c-1), circumferentially distributed 2 one side ball racks (c-3), 2 two-sided ball racks (c-4), couple together one side ball rack (c-3), two-sided ball rack (c-4) and synchronous ring (6) with 2 bolts (c-6) and 2 nuts (c-7)；Ball (c-5) is in the upper motion of column ball road (c-2)；
Or described synchronous ring (6) is directly embedded into formula structure for linear bearing, including: bearing guide groove (d-1), finished product linear bearing (d-2), bearing cap (d-3), bearing guide (d-4) and screw (d-5)；Axially distributed 2 finished product linear bearings (d-2), linear bearing outer ring and bearing guide groove interference fit in everywhere bearing guide groove (d-1), 4 screws (d-5) are used for fastening bearing cap (d-3)；Bearing guide (d-4) is arranged on outer casing leading portion (1).
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| CN105484898A (en) * | 2015-12-25 | 2016-04-13 | 中国航空工业集团公司沈阳发动机设计研究所 | Mode switching device of variable cycle engine |
| CN111219265A (en) * | 2020-02-14 | 2020-06-02 | 中国航发沈阳发动机研究所 | Variable cycle engine mode control mechanism and intermediate casing structure with same |
| CN111207005A (en) * | 2020-02-14 | 2020-05-29 | 中国航发沈阳发动机研究所 | Variable cycle engine mode control mechanism and intermediate casing structure with same |
| CN114165816B (en) * | 2022-02-09 | 2022-06-03 | 中国航发四川燃气涡轮研究院 | Engine hydraulic actuator cylinder mounting device |
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| US5136840A (en) * | 1982-09-30 | 1992-08-11 | General Electric Company | Gas turbine engine actuation system |
| US6901739B2 (en) * | 2003-10-07 | 2005-06-07 | General Electric Company | Gas turbine engine with variable pressure ratio fan system |
| CN101709679B (en) * | 2009-12-18 | 2013-06-05 | 北京航空航天大学 | Adjustable rear culvert channel injector in mode switching mechanism of variable cycle engine |
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