CN103925115B - The peaceful dynamic formula front duct ejector of pull rod shaft in a kind of variable cycle engine adjusting mechanism - Google Patents
The peaceful dynamic formula front duct ejector of pull rod shaft in a kind of variable cycle engine adjusting mechanism Download PDFInfo
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Abstract
The peaceful dynamic formula front duct ejector of pull rod shaft in a kind of variable cycle engine adjusting mechanism, comprise 4 cover driving mechanism and valve bodies, often overlap driving mechanism and comprise hydraulic actuator, connecting rod, two row ball bearing, two row ball bearing bearing cap, T-shaped rotating shaft, stick roller bearing, valve body pull bar and spherical plain bearing rod end, linear bearing and linear bearing U-shaped frame respectively.The present invention flows to the Flow area of by-pass air duct after can changing core drive fan level exactly according to the requirement of pneumatic design, coordinate other adjusting mechanisms jointly to change the recurrent state of variable cycle engine, take into account high maintainability, high reliability simultaneously, life-span is long, the advantage of good economy performance.
Description
Technical field
The present invention relates to the peaceful dynamic formula front duct ejector of pull rod shaft in a kind of variable cycle engine adjusting mechanism, for changing engine behavior to adapt to different flying conditions, belonging to the high-performance gas turbogenerator technical field in aerospace engineering.
Background technique
Variable cycle engine is a kind of propulsion system with outstanding combination property.Variable cycle engine refers to the gas turbine engine that can be realized different thermodynamic cycle on same motor by the change of the geometrical shape of some parts of motor, size or position.
From motor theory: the supersonic performance of turbojet engine is good, and specific thrust is large, and during high Mach flight, oil consumption rate is relatively low; Turbofan engine then has good subsonic speed performance, and during low mach flight, oil consumption rate is relatively low, but specific thrust is less.Typical two duct variable cycle engine schemes synthesis turbojet engine circulation and turbofan engine circulation advantage, can according to the difference of flying condition, regulated by the geometry of multiple parts and reasonably change bypass ratio thus make motor between single duct turbojet or the different mode of operation of two duct turbofan two kinds, carry out the change of recurrent state, reach the object having different performances under different flight state.So compare with turbofan engine with traditional turbojet engine, between whirlpool spray and turbofan, the variable cycle engine of recurrent state conversion can have optimal performance in broader operating range.
The adjusting mechanism of typical case's variable cycle engine mainly comprises mode switching valve, front duct ejector, rear culvert channel injector.Wherein, front duct ejector is between core drive fan level and core engine, by-pass air duct, its effect is the Flow area by changing between core drive fan level to by-pass air duct, coordinates other controlling mechanisms to complete the process of variable cycle engine change thermodynamic cycle.
External variable cycle engine design is started in 20 century 70s, has developed the validator realizing this change recycle scheme at present.And domestic variable cycle engine is designed this century and just starts to carry out, be also in the conceptual phase becoming circulation theory.
US Patent No. 4175384 discloses a kind of front duct ejector structure, its by the actuator that is built in core drive fan casing along engine shaft to promote valve body realize valve can the change of state of a control.Actuator's structural type of this patent formula is simple, does device and is placed in core drive fan casing, save space, simultaneously only need in by-pass air duct insertion portion hydraulic tubing, do not affect the aeroperformance of by-pass air duct to a certain extent.But actuator is built in maintenance and the installation that can affect mechanism in core drive fan casing by the scheme that this patent provides, thus can affect Economy to a great extent.
US Patent No. 4068471 discloses a kind of front duct ejector structure, and it provides power by the actuator being built in core drive fan casing, by providing the mode of effective torque to make valve sheet rotate around immovable point, realizes the change of Flow area.The structural type that this patent formula uses is comparatively simple, only can use the effect of mechanism's implementation pattern changing valve and front duct ejector two adjustable mode switching mechanisms.But only can control accurately at two extreme positions in theory, control accurately mechanism's intermediateness is more difficult, obturaging design between valve sheet is also a problem of scheme, and pressurized strut is simultaneously built in core drive fan casing and also there is maintenance and the problem of installing therefore generally speaking concept feasible is not high.
Chinese patent 200920277530-X discloses a kind of front duct ejector structure, its use be placed in by-pass air duct do device along engine shaft to the thin-walled valve body being forced through design, realizing valve can the change of state of a control, changes Flow area.This patent formula uses first injection, the valve body device of rear flat fire thin-walled cartridge type, Gas Mixing in Cross flow can be made comparatively mild, have higher pneumatic efficiency; Whole mechanism structure is simple simultaneously, and number of parts is few, lightweight, and reliability is high.But the program arranges more parts in air-flow path, particularly translation centrum occupies a larger part for by-pass air duct, produces certain influence to the aeroperformance of by-pass air duct, adopts fulcrum thin-walled valve body rearward to occur vibration problem simultaneously.
To sum up, there is some deficiency following in prior art: (1) maintenance existing problems, cost is higher.Be mainly reflected in and be placed in runner by pressurized strut or in core drive fan casing, more difficult realization is installed in practical situations both, and once mechanisms fail, needs the large-scale dismounting carrying out motor, add cost during maintenance.(2) pneumatic efficiency of motor prototype is affected.The front duct ejector mechanism be mainly reflected in above-mentioned patent directly adopts thin-walled valve body to block air-flow path or more mechanism is directly placed in the middle of runner, and Shangdi have impact on pneumatic efficiency largely.(3) design making valve body (sheet) stable operation is not carried out.Be mainly reflected in and do not design connection between valve body (sheet) and core drive fan casing or bridging arrangement, change the axial position opening and closing angle of simple moment transmission change valve sheet (or by) of valve body only by the simple axial motion of pressurized strut.(4) more difficult realization accurately regulates.Be mainly reflected in and adopt valve sheet opening and closing cannot accurate given Flow area and aeroperformance, adopt first injection, easily there is vibration in the valve body form of rear flat fire, affects the aeroperformance calculated.
Summary of the invention
The problem that technology of the present invention solves is: the maintenance cost overcoming prior art patent is high, affect the pneumatic efficiency of motor prototype, and be difficult to the shortcoming worked efficiently steady in a long-term, the mechanism scheme of the front duct ejector in a kind of variable cycle engine adjusting mechanism is provided, the Flow area of by-pass air duct is flowed to after can changing core drive fan level exactly according to the requirement of pneumatic design, other adjusting mechanisms are coordinated jointly to change the recurrent state of variable cycle engine, taken into account high maintainability simultaneously, high reliability, life-span is long, the advantage of good economy performance.
Technical solution of the present invention is: the peaceful dynamic formula front duct ejector of the pull rod shaft in a kind of variable cycle engine adjusting mechanism, comprise 4 cover driving mechanism and valve bodies, often overlap driving mechanism and comprise hydraulic actuator, connecting rod, two row ball bearing, two row ball bearing bearing cap, T-shaped rotating shaft, stick roller bearing, valve body pull bar and spherical plain bearing rod end, linear bearing and linear bearing U-shaped frame respectively; Described hydraulic actuator comprises pressurized strut cylindrical shell and pressurized strut rod member; Pressurized strut cylindrical shell realizes fixing between itself and outer casing by pressurized strut cylindrical shell joint shaft bearing and the first tightening nut, allows pressurized strut cylindrical shell to have certain oscillating motion simultaneously; Pressurized strut rod member one end is connected with pressurized strut cylindrical shell, and the other end is connected with the lug of connecting rod with pressurized strut spherical plain bearing rod end by the first hinging pin shaft; The other end of connecting rod is closely connected with the cylindrical body of interior six prism fitting surfaces and the outer six prism ligands of T-shaped rotating shaft, this end of T-shaped rotating shaft simultaneously is also matched by T-shaped rotating shaft second cylindrical body with two row ball bearing, and the radial location of connecting rod and two row ball bearing is realized by sleeve, two row ball bearing is installed in the hollow cylinder on two row ball bearing bearing cap by circlip; Two row ball bearing bearing cap is then secured by bolts on the square installation base on outer casing; One end that the middle part of T-shaped rotating shaft is stretched out connects one end of valve body pull bar and spherical plain bearing rod end by the second hinging pin shaft, the other end of valve body pull bar and spherical plain bearing rod end connects the cylindrical body boss on valve body, and fastening by tightening nut; The other end of T-shaped rotating shaft is matched with stick roller bearing by T-shaped rotating shaft first cylindrical body; Stick roller bearing is fixed on the stick roller bearing installation base of core drive fan casing by the second circlip; Linear bearing is connected with the male cooperation on linear bearing U-shaped frame by groove, linear bearing U-shaped frame then by being connected with valve body with the cooperation of linear bearing mounting blocks, simultaneously linear axis bolster in along engine shaft to linear bearing support on.Linear bearing and associated components thereof rotate for retraining valve body circumference, reduce valve body along the frictional force in motor axial movement simultaneously, enable valve body stably along motor axial motion.
Described 4 cover driving mechanisms are uniform along outer casing circumference, eachly stagger 90 °.
Described outer casing is thin-wall barrel, has different diameters along engine shaft to different positions; Thin-wall barrel is processed with cylindrical body boss, pressurized strut cylindrical shell joint shaft bearing is fixed on the cylindrical body boss on outer casing, cylindrical body boss is processed with screw thread, first tightening nut fastening pressurized strut cylindrical shell joint shaft bearing can be passed through, this design allows pressurized strut cylindrical shell can do the oscillating motion of several angle around the central axis of cylindrical body boss, ensure that the feasibility of mechanism, avoid the issuable mount stress of pressurized strut cylindrical shell simultaneously; Casing needs the anchor ring of installation two row ball bearing circumferentially has circular hole equably outside simultaneously, and be processed with the square installation base matched with two row ball bearing bearing cap, square installation base is processed with everywhere uniform bolt hole is as location fastener hole simultaneously, and circular hole and square installation base are in order to install two row ball bearing and two row ball bearing bearing cap.
Described core drive fan casing is thin-wall barrel, and different stage positions has different diameters, the cylndrical surface that it coordinates with the part of valve body front end is processed with groove in order to install elastic seal ring; Position corresponding with square installation base on outer casing is in the circumferential processed with stick roller bearing installation base, the shape of stick roller bearing installation base and two row ball bearing bearing cap is similar, also with convex shoulder and circlip mounting groove, convex shoulder installs stick roller bearing in order to coordinate the second circlip; Oblique cylindrical shell near groove is processed with the first square boss, boss is processed with and the first square boss first through hole of linear bearing support assorted and the first square boss second through hole of matching with linear bearing rack ventilating hole; The mounting edge of core drive fan casing is processed with the second square boss, and the second square boss is processed with the second square boss through hole, in order to match with the through hole on linear bearing support installing limit.
Described connecting rod is an intermediate section cross section is the straight rod member of rectangle, straight rod member one end is connected with the cylindrical body with interior six prism fitting surfaces, the other end is then connected with the lug that can be connected pressurized strut rod member spherical plain bearing rod end by the first hinging pin shaft, lug is two structures that bottom is rectangular, head has semi-cylindrical hill, and in the middle part of two semi-cylindrical hills, have the through hole be positioned on same axis, for being fixedly connected with of the first hinging pin shaft.
Described T-shaped rotating shaft is a global shape is T-shaped transmission part, main body is hollow cylindrical body, and hollow cylindrical body two ends are respectively the outer six prism ligands and T-shaped rotating shaft first cylindrical body coordinated with stick roller bearing and T-shaped rotating shaft first shaft shoulder that coordinate with connecting rod; Intermediate portion is designed with near the one end be connected with connecting rod T-shaped rotating shaft second cylindrical body and T-shaped rotating shaft second shaft shoulder that coordinate with two row ball bearing; Intermediate portion draws near one end of coordinating with stick roller bearing the straight rod member that cross section is rectangle, the end of rod member be also a shape as the lug of connecting rod one end, in order to connect valve body pull bar spherical plain bearing rod end and the second hinging pin shaft.
Described two row ball bearing bearing cap is a main body is the bearing-mounted parts of hollow cylinder, and the hollow cylinder at center is with convex shoulder and circlip mounting groove, and convex shoulder can coordinate with the first circlip and sleeve stablizes two row ball bearing; And be processed with the square stage body of uniform bolt hole everywhere at hollow cylinder peripheral, thus can be fastened by bolts with square installation base on outer casing.
Described valve body is a thin-walled cylindrical workpiece through cutting, is the non-domain structure of part; Valve body has circumference equally distributed 4 to the fluting coordinated with linear bearing U-shaped frame, and be processed with at equally distributed circumferential 4 places the cylindrical body boss be connected with valve body pull bar and spherical plain bearing rod end, cylindrical body boss is processed with screw thread, can the second tightening nut fastening valve body pull bar spherical plain bearing rod end be passed through; Valve body front end reduces aerodynamic loss by fillet process; Simultaneously valve body only retains the cell body part that the upper 4 place's cylindrical body projection sections of circumference and valve body coordinate with linear bearing U-shaped frame and cuts, and the obstruction conditions that other positions in the circumferential meet runner in guarantee cuts, to alleviate the weight of valve body.
Described linear bearing is standard piece, and outer shroud is processed with the groove with linear bearing U-shaped frame male cooperation, in order to location.
Described linear bearing U-shaped frame is the connected element of the similar letter U of sectional shape, is processed with the projection with linear bearing groove fit, in order to location; Wall has through hole and matches with the through hole on linear bearing mounting blocks, in order to bolt, nut check.
Described linear bearing support is a body length rod member, through hole is processed with at two ends, two ends through hole coordinates in order to position with the first square boss first through hole that core fans drive casing is processed and linear bearing support installing limit third through-hole respectively, and with bolt, nut check.
Described linear bearing support installing limit is a connected element being processed with three place's through holes, three place's through holes---linear bearing support installing limit first through hole, linear bearing support installing limit second through hole and linear bearing support installing limit third through-hole match with the through hole on the second square boss through hole, linear bearing support on core fans drive casing and linear bearing support respectively, and coordinate location with two places before bolt, nut check.
Described elastic seal ring is a graphite seal circle having opening, can be arranged in the groove on core drive fan casing, and realize the internal surface that its external annular surface is close to valve body, can as the fulcrum of valve body along motor axial motion while playing sealing effect.
Described linear bearing mounting blocks is the connected element of a likeness in form cuboid, and an arc surface on it coordinates with valve body, be processed with on relative two sides with on linear bearing U-shaped frame open two through holes that hole coordinates, and fastening with bolt and nut.
The advantage that the present invention compared with prior art has is as follows:
(1) maintenance that had of the present invention.Being mainly manifested in and hydraulic actuator is placed on outer casing, the maintenance task such as the replacing of pressurized strut rod member, the cleaning oil pollution of pressurized strut cylindrical shell can be carried out when not dismantling outer casing.
(2) working stability that had of the present invention.Be mainly manifested in and promote valve body by parallel four cover pushing mechanisms, when a set of mechanism goes wrong wherein, other mechanisms still can realize the function of front duct ejector.Adopt two row ball bearing and stick roller bearing to support T-shaped rotating shaft simultaneously, ensure that T-shaped rotating shaft not stable rotation prejudicially; Adopt linear bearing to connect the linear bearing support that valve body and core drive fan casing support, define the movement locus of valve body, achieve valve body reposefully along motor axial motion, reduce the surface friction drag of valve body simultaneously; Adopt many places joint shaft bearing only in mechanism, to introduce isolated degree of freedom, when can avoid installing, occur larger mount stress, even if can make can stably move under the prerequisite having several angle between component simultaneously; The incompatible transmitting force of six prism close-fittings and moment is have employed between connecting rod and rotating shaft, simple and reliable for structure; , not easily there is valve body vibration problem in direct employing throttle type valve body.
(3) the present invention reduces the impact of mechanism on the pneumatic efficiency of motor prototype to a great extent.Be mainly manifested in and only have a part of parts of small volume to be placed in the middle of runner, decrease the pressure loss of air-flow; Fillet process is carried out to valve body front end, has made air-flow streamline comparatively mild, reduce aerodynamic loss when air-flow flows through; Employ elastic seal ring, reduce the gas flow through from intension and pass back into by-pass air duct by the space of valve body and core drive fan casing, improve pneumatic efficiency.
(4) contemplated by the invention mechanism and problem is affected on the weight of motor.Be mainly reflected in and part cutting has been carried out to valve body, realizing under it blocks the prerequisite of the function of runner, reducing its weight (calculating shows to reduce the valve weight of about 30%) largely; The body cylindrical body partial design of rotating shaft is become hollow structure, and in guarantee, it reduces its weight while normally working.
Accompanying drawing explanation
Fig. 1 is the local two dimension front view of adjustable front duct ejector of the present invention;
Fig. 1 a is the local two dimension front view zoomed-in view 1 of adjustable front duct ejector of the present invention;
Fig. 1 b is the local two dimension front view zoomed-in view 2 of adjustable front duct ejector of the present invention;
Fig. 2 is the local two dimension plan view of adjustable front duct ejector of the present invention;
Fig. 3 is the local two dimension right elevation of adjustable front duct ejector of the present invention;
Fig. 4 is the partial structurtes schematic diagram of the outer casing of the present invention;
Fig. 5 is the partial structurtes schematic diagram of core drive fan casing of the present invention;
Fig. 6 is the structural representation of pressurized strut cylindrical shell of the present invention;
Fig. 7 is the structural representation of pressurized strut rod member of the present invention;
Fig. 8 is the structural representation of hinging pin shaft of the present invention;
Fig. 9 is the structural representation of connecting rod of the present invention;
Figure 10 is the structural representation of two row ball bearing of the present invention;
Figure 11 is the structural representation of two row ball bearing bearing cap of the present invention;
Figure 12 is the structural representation of the T-shaped rotating shaft of the present invention;
Figure 13 is the structural representation of stick roller bearing of the present invention;
Figure 14 is the structural representation of valve body pull bar of the present invention and spherical plain bearing rod end;
Figure 15 is the structural representation of valve body of the present invention;
Figure 16 is the structural representation of linear bearing of the present invention;
Figure 17 is the structural representation of linear bearing U-shaped frame of the present invention;
Figure 18 is the structural representation of linear bearing support of the present invention;
Figure 19 is the structural representation of linear bearing mounting edge of the present invention;
Figure 20 is the structural representation of linear bearing mounting blocks of the present invention.
In figure, symbol description is as follows:
1. outer casing, 1-1. cylindrical body boss, 1-2. square installation base, 2. the first tightening nut, 3. pressurized strut cylindrical shell, 3-1. pressurized strut cylindrical shell joint shaft bearing, 4. pressurized strut rod member, 4-1. pressurized strut rod member spherical plain bearing rod end, 5. the first hinging pin shaft, 6. connecting rod, 6-1. straight rod member, 6-2. is with the cylindrical body of interior six prism fitting surfaces, 6-3. lug, 7. the first circlip, 8. sleeve, 9. two row ball bearing, 10. two row ball bearing bearing cap, 10-1. hollow cylinder, 10-2. square stage body, 10-3. convex shoulder, 10-4 first circlip mounting groove, the rotating shaft of 11.T font, 11-1. hollow cylinder, the outer six prism ligands of 11-2., 11-3.T font rotating shaft first cylindrical body, 11-4.T font rotating shaft first shaft shoulder, 11-5.T font rotating shaft second cylindrical body, 11-6.T font rotating shaft second shaft shoulder, 11-7. straight rod member, 11-8. lug, 12. stick roller bearings, 13. valve body pull bar and spherical plain bearing rod ends, 13-1. connecting cylinder body, 13-2. valve body pull bar spherical plain bearing rod end, 14. valve bodies, 14-1. cylindrical body boss, the fluting that 14-2. coordinates with linear bearing U-shaped frame, 15. core drive fan casings, 15-1. installs the groove of elastic seal ring, 15-2. stick roller bearing installation base, 15-3. the first square boss, 15-4. first square boss first through hole, 15-5. first square boss second through hole, 15-6. the second square boss, 15-7. second square boss through hole, 16. linear bearings, the groove of 16-1. and linear bearing U-shaped frame male cooperation, 17. linear bearing U-shaped framves, the projection of 17-1. and linear bearing groove fit, 17-2. through hole, 18. linear bearing support 18-1. through holes, 19. linear bearing support installing limits, 19-1. linear bearing support installing limit first through hole, 19-2. linear bearing support installing limit second through hole, 19-3. linear bearing support installing limit third through-hole, 20. bolts, 21. elastic seal rings, 22. linear bearing mounting blocks, 22-1. through hole, 23. second hinging pin shafts, 24. second tightening nuts, 25. second circlips.
Embodiment
The Placement of the front duct ejector in the present invention is as follows:
As Fig. 1, Fig. 2, shown in Fig. 3, pressurized strut cylindrical shell 3 is connected to outer casing 1 by pressurized strut cylindrical shell joint shaft bearing 3-1, and it is fastening by the first tightening nut 2, match with pressurized strut cylindrical shell 3 in one end of pressurized strut rod member 4, the other end is connected with the lug 6-3 of connecting rod 6 with pressurized strut spherical plain bearing rod end 4-1 by the first hinging pin shaft 5, the other end of connecting rod 6 is then connected with the outer six prism ligand 11-2 of T-shaped rotating shaft 11 by interior six prism fitting surfaces, T-shaped rotating shaft 11 is stablized by two row ball bearing 9 and stick roller bearing 12, and be connected by the second hinging pin shaft 23 one end with valve body pull bar and spherical plain bearing rod end 13 at its lug 11-8 place, the other end of valve body pull bar and spherical plain bearing rod end 13 is connected on cylindrical body boss 14-1 that valve body 14 welds by the second tightening nut 24, two row ball bearing 9 is retrained everywhere by the convex shoulder 10-3 of the first circlip 7, T-shaped rotating shaft second shaft shoulder 11-6, two row ball bearing lid and sleeve 8 and is arranged in two row ball bearing bearing cap 10, and two row ball bearing bearing cap 10 is fastened by bolts outside on casing 1, stick roller bearing 12 is arranged in the installation stick roller bearing hollow cylinder boss 15-2 of processing on core drive fan casing 15 by the convex shoulder in the stick roller bearing installation base 15-2 on the second circlip 25, T-shaped rotating shaft first shaft shoulder 11-4 and core drive fan casing, linear bearing 16 is coordinated with the protruding 17-1 on linear bearing U-shaped frame 17 by groove 16-1 and is connected, linear bearing U-shaped frame 17 is after passing the fluting 14-2 on valve body 14, pass through coordinating of processed through hole 17-2 and the through hole 22-1 that linear bearing mounting blocks 22 is processed, fastening with bolt and nut, realize the connection between valve body 14, linear bearing 16, linear bearing U-shaped frame 17 and linear bearing mounting blocks 22, linear bearing 16 frame in along engine shaft to linear bearing support 18 on, linear bearing support 18 through the first square boss first through hole 15-4 on linear bearing support installing limit third through-hole 19-3 and core drive fan casing 15 along engine shaft on core drive fan casing 15, and coordinate with the first square boss second through hole 15-5 on linear bearing support installing limit second through hole 19-2 and core drive fan casing 15 respectively with two place through hole 18-1, carry out fastening with bolt and nut, linear bearing support installing limit 19 is coordinated with the second square boss through hole 15-7 on core drive fan casing 15 by linear bearing support installing limit first through hole 19-1, and is fastened by bolts on core drive fan casing 15.Elastic seal ring 21 is arranged in the groove 15-1 on core drive fan casing 15, and is coordinated with valve body 14 by external annular surface.Valve body 14 by linear bearing 16 everywhere and associated components thereof and elastic packing back-up ring 20 liang place engine shaft to fulcrum frame on core drive fan casing 15.
The embodiment of the front duct ejector in the present invention is as follows:
The present invention is poor by chamber, the front and back oil pressure changing the cylindrical shell of pressurized strut everywhere 3 be arranged in outside outer casing 1 simultaneously, and make four cover driving mechanisms drive valve body, the specific works process of often overlapping driving mechanism is as described below simultaneously.The change of chamber, the front and back oil pressure difference of pressurized strut cylindrical shell 3 makes pressurized strut rod member 4 start, and drivening rod 6 rotates around the center line of outer six prisms of T-shaped rotating shaft 11; Connecting rod 6 coordinates the T-shaped rotating shaft 11 of drive to rotate by six prisms; T-shaped rotating shaft 11 is with moving valve pull bar and spherical plain bearing rod end 13 to move; Valve body pull bar and spherical plain bearing rod end 13 draw valve body 14 and move, under the circumference constraint that valve body 14 is formed jointly at linear bearing 16 and associated components thereof, along motor axial motion.Whole mechanism, according to pneumatic requirement, inputs equal power by pressurized strut everywhere simultaneously, and final mobile valve changes Flow area, thus changes engine operational cycle parameter, reaches the regulation and control object making variable cycle engine enter different thermodynamic cycle states.
As shown in Figure 4, outer casing 1 is thin-wall barrel, different diameters is had to different positions along engine shaft, the anchor ring that casing 1 need install two row ball bearing outside circumferentially has the 4 isodiametric circular holes in place equably, and be processed with the 4 place square installation base 1-2 matched with two row ball bearing bearing cap 10, each boss has the location fastener hole of 4 bolts hole as two row ball bearing bearing cap 10,4 place's circular holes and square protrusions are in order to install two row ball bearing 9 and two row ball bearing bearing cap 10 simultaneously.Outside casing 1 in order to pressurized strut cylindrical shell 3 is installed anchor ring on circumference be processed with 4 place cylindrical body boss 1-1 equably, in order to install pressurized strut cylindrical shell joint shaft bearing 2, and on cylindrical body boss 1-1, be processed with screw thread, in order to connect the first tightening nut 2 of fastening pressurized strut.This design allows pressurized strut cylindrical shell 3 can do the oscillating motion of several angle around the central axis of cylindrical body boss 1-1, ensure that the feasibility of mechanism, avoids the issuable mount stress of pressurized strut cylindrical shell 3 simultaneously.
As shown in Figure 5, core drive fan casing 15 is thin-wall barrel, and different stage positions has different diameters, the cylndrical surface that it coordinates with the part of valve body 14 front end is processed with groove 15-1 in order to install elastic seal ring 21; Stick roller bearing installation base 15-2 is processed with in the position corresponding with square installation base 1-2 on outer casing 1, the shape of stick roller bearing installation base 15-2 and two row ball bearing bearing cap 10 is similar, also with convex shoulder and circlip mounting groove, convex shoulder installs stick roller bearing 12 in order to coordinate the second circlip 25; Oblique cylindrical shell near groove 15-1 is processed with the first square boss 15-3, boss is processed with the first square boss first through hole 15-4 coordinated with linear bearing support 18 and the first square boss second through hole 15-5 matched with linear bearing rack ventilating hole 18-1; The mounting edge of core drive fan casing 15 is processed with the second square boss 15-6, and the second square boss 15-6 is processed with the second square boss through hole 15-7, in order to match with the through hole 19-1 on linear bearing support installing limit, and adopts bolt and nut fastening.
Hydraulic actuator used in the present invention is aeroengine hydraulic actuator, and it forms primarily of pressurized strut cylindrical shell 3 and pressurized strut rod member 4.As shown in Figure 6, its pressurized strut cylindrical shell 3 is designed with former and later two oil pocket, by providing different oil pressure to ante-chamber and back cavity, pressurized strut rod member 4 is done.Pressurized strut cylindrical shell 3 is connected with pressurized strut cylindrical shell joint shaft bearing 3-1, fastening thus to realize between hydraulic actuator and outer casing 1 fixing by the first tightening nut 2 couples of pressurized strut cylindrical shell joint shaft bearing 3-1.Achieve pressurized strut cylindrical shell 3 to rotate around pressurized strut cylindrical shell joint shaft bearing 3-1 simultaneously, ensure that body function realization, avoid occurring larger mount stress thus the functional realiey affecting sleeve mechanism.As shown in Figure 7, pressurized strut rod member 4 is the different cylindrical body rod member of diverse location radius, and in order to transmit the power that before and after pressurized strut, oil pocket pressure reduction provides, its rod end is connected with pressurized strut rod member spherical plain bearing rod end 4-1; The material of pressurized strut rod member spherical plain bearing rod end 4-1 is structural carbon steel, and it bears the constant load in direction, can bear the thrust load that either direction is less than or equal to 0.2 times of radial load while bearing radial load.Its wear-resisting property is good, and friction factor is little, long service life.Pressurized strut rod member spherical plain bearing rod end 4-1 and the first hinging pin shaft 5 ensure that pressurized strut rod member 4 is connected with connecting rod 6 is stable and rotates around this point, avoid occurring larger stress when mounted.
As shown in Figure 8, the first hinging pin shaft 5 and the second hinging pin shaft 23 are the A type bearing pin in GB/T882-2008 standard.The effect of the first hinging pin shaft 5 is connected pressurized strut rod member 4 and connecting rod 6 by the through hole on connecting rod 6 lug 6-3 with pressurized strut rod member spherical plain bearing rod end 4-1, the effect of the second hinging pin shaft 23 to be connected T-shaped rotating shaft 11 and valve body pull bar and spherical plain bearing rod end 13 with valve body pull bar spherical plain bearing rod end 13-2 by the through hole on the lug 11-8 of T-shaped rotating shaft 11, fastening by the connection of two place's hinging pin shafts and spherical plain bearing rod end, two groups of driving links stably can rotate around the center line of hinging pin shaft.
As shown in Figure 9, the straight rod member 6-1 of connecting rod 6 to be an intermediate section cross section be rectangle, one end is connected with the cylindrical body 6-2 with interior six prism fitting surfaces, the other end is then connected with the lug 6-3 that can connect pressurized strut rod member spherical plain bearing rod end 4-1 and the first hinging pin shaft 5, lug 6-3 is two structures that bottom is rectangular, head has semi-cylindrical hill, and in the middle part of two semi-cylindrical hills, have the through hole be positioned on same axis, affixed for the first hinging pin shaft 5.
As shown in Figure 10, two row ball bearing 9 adopts base steel without oil supply self oiling bearing, is installed in two row ball bearing bearing cap 10, matches with T-shaped rotating shaft second cylindrical body 11-5.Its effect ensures that T-shaped rotating shaft 11 rotation axis when rotating stressed keeps stable.
As shown in figure 11, the bearing-mounted parts of two row ball bearing bearing cap 10 to be main bodys be hollow cylinder 10-1, the hollow cylinder 10-1 at center can coordinate with the first circlip 7 and sleeve 8 with convex shoulder 10-3 and circlip mounting groove 10-4, convex shoulder 10-3 and stablizes two row ball bearing 9; And 10-1 outside is welded with the square stage body 10-2 being processed with uniform bolt hole everywhere in cylindrical body, thus can be fastened by bolts with square installation base 1-2 on outer casing 1.
As shown in figure 12, T-shaped rotating shaft 11 is global shapes is T-shaped transmission part, main body is hollow cylindrical body 11-1, and hollow cylindrical body 11-1 two ends are respectively the outer six prism ligand 11-2 coordinated with the connecting rod 6 and T-shaped rotating shaft first cylindrical body 11-3 coordinated with stick roller bearing 12 and T-shaped rotating shaft first shaft shoulder 11-4; Intermediate portion is designed with near the one end be connected with connecting rod 6 the T-shaped rotating shaft second cylindrical body 11-5 and T-shaped rotating shaft second shaft shoulder 11-6 that coordinate with two row ball bearing 9; Intermediate portion draws near the one end coordinated with stick roller bearing 12 the straight rod member 11-7 that cross section is rectangle, is also the lug 11-8 of a shape as connecting rod 6 one end, in order to connect valve body pull bar spherical plain bearing rod end 13-2 and the second hinging pin shaft 23 at the end of rod member.T-shaped rotating shaft 11 under the drive of connecting rod 6, transmit force and moment thus by one end of being connected with valve body pull bar and spherical plain bearing rod end 13 drive the valve body 14 in runner along engine shaft to move.
As shown in figure 13, stick roller bearing 12 adopts base steel without oil supply self oiling bearing, be installed in the stick roller bearing installation base 15-2 on core drive fan casing 15, two row ball bearing 9 can be coordinated to ensure, and T-shaped rotating shaft 11 rotation axis when rotating stressed keeps stable.
As shown in figure 14, valve body pull bar and spherical plain bearing rod end 13 are that in the middle of one, part is connecting cylinder body 13-1, and two ends are processed with the force-transmitting member of spherical plain bearing rod end 13-2.Its effect connects T-shaped rotating shaft 11 and valve body 14.
As shown in figure 15, valve body 14 is the thin-walled cylindrical workpieces through cutting, is the non-domain structure of part; Valve body 14 is processed with circumference equally distributed 4 and coordinates cell body 14-2 to linear bearing U-shaped frame 17, and be processed with the 2 sections of cylindrical body boss 14-1 be connected with valve body pull bar and spherical plain bearing rod end 13 everywhere circumference is equally distributed, cylindrical body boss 14-1 is processed with screw thread, can the second tightening nut 24 fastening valve body pull bar spherical plain bearing rod end 13-2 be passed through; Valve body 14 front end reduces aerodynamic loss by fillet process; Simultaneously valve body only retains the cell body 14-2 that the upper 4 place cylindrical body boss 14-1 parts of circumference and valve body 14 coordinate with linear bearing U-shaped frame 17 and partly cuts, and other positions are in the circumferential ensureing that the obstruction conditions meeting runner cuts, to alleviate valve body 14 weight.The effect of valve body 14 is the requirements blocking to meet pneumatic design carrying out motor runner, is the critical component realizing front duct ejector effect.
As shown in figure 16, described linear bearing 16 is standard piece, and outer shroud is processed with the groove 16-1 that 17-1 protruding with linear bearing U-shaped frame coordinates, in order to location.Linear bearing 16 frame on linear bearing support 18, and is connected with valve body 14 by the parts such as linear bearing U-shaped frame 17 and linear bearing mounting blocks 22, ensure that valve body 14 can stably along engine shaft to moving.
As shown in figure 17, described linear bearing U-shaped frame 17 is the similar U-shaped connected element of sectional shape, is processed with the protruding 17-1 coordinated with linear bearing groove 16-1, in order to location; Wall has through hole 17-2 and matches with the through hole 22-1 on linear bearing mounting blocks 22, in order to bolt, nut check.Linear bearing U-shaped frame 17 achieves linear bearing 16 and the connection of valve body 14, achieves the feasibility of mechanism.
As shown in figure 18, described linear bearing support 18 is a body length rod member, through hole 18-1 is processed with at two ends, two ends through hole coordinates in order to position with the first square boss first through hole 15-5 that core fans drive casing is processed and linear bearing support installing limit third through-hole 19-3 respectively, and with bolt, nut check.Linear bearing support 18 on core drive fan casing 15, is the motion guide rail of linear bearing 16 and valve body 14 along engine shaft to frame.
As shown in figure 19, described linear bearing support installing limit 19 is a connected element being processed with three place's through holes, three place's through holes---linear bearing support installing limit first through hole 19-1, linear bearing support installing limit second through hole 19-2 and linear bearing support installing limit third through-hole 19-3 matches with the through hole 18-1 on the second square boss through hole 15-6, linear bearing support 18 on core fans drive casing 15 and linear bearing support 18 respectively, and coordinates location with two places before bolt, nut check.Linear bearing support installing limit 19 realizes the critical component that linear bearing support 18 is connected with core drive fan casing 15.
As shown in figure 20, described linear bearing mounting blocks 22 is the connected element of a likeness in form cuboid, an arc surface on it coordinates with valve body 14, be processed with on relative two sides with on linear bearing U-shaped frame 17 open two through hole 22-1 that hole 17-2 coordinates, and fastening with bolt and nut.Linear bearing mounting blocks 22 achieves linear bearing 16, connection between linear bearing U-shaped frame 17 and valve body 14.
Wherein, uniform 4 of hydraulic actuator circumference, staggers 90 °; Joint shaft bearing has 16 everywhere; Uniform 4 of connecting rod 6 circumference, staggers 90 °; T-shaped uniform 4 of rotating shaft 11 circumference, staggers 90 °; Two row ball bearing 9 and stick roller bearing 11 circumference uniform 4 respectively, stagger 90 °.
Non-elaborated part of the present invention belongs to techniques well known.
The above; be only part embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those skilled in the art are in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (8)
1. the peaceful dynamic formula front duct ejector of pull rod shaft in a variable cycle engine adjusting mechanism, it is characterized in that: comprise 4 cover driving mechanisms and valve body (14), often overlap driving mechanism and comprise hydraulic actuator, connecting rod (6), two row ball bearing (9), two row ball bearing bearing cap (10), T-shaped rotating shaft (11), stick roller bearing (12), valve body pull bar and spherical plain bearing rod end (13), linear bearing (16) and linear bearing U-shaped frame (17) respectively, described hydraulic actuator comprises pressurized strut cylindrical shell (3) and pressurized strut rod member (4), pressurized strut cylindrical shell (3) realizes fixing between itself and outer casing (1) by pressurized strut cylindrical shell joint shaft bearing (3-1) and the first tightening nut (2), allows pressurized strut cylindrical shell (3) to have certain oscillating motion simultaneously, pressurized strut rod member (4) one end is connected with pressurized strut cylindrical shell (3), and the other end pressurized strut spherical plain bearing rod end (4-1) is connected with the lug (6-3) of connecting rod (6) by the first hinging pin shaft (5), the other end of connecting rod (6) with interior six prism fitting surfaces cylindrical body (6-2) and T-shaped rotating shaft (11) outward six prism ligands (11-2) be closely connected, T-shaped rotating shaft (11) this end is also matched by T-shaped rotating shaft second cylindrical body (11-5) with two row ball bearing (9) simultaneously, and the radial location of connecting rod (6) and two row ball bearing (9) is realized by sleeve (8), two row ball bearing (9) is installed in the hollow cylinder (10-1) on two row ball bearing bearing cap (10) by circlip (7), two row ball bearing bearing cap (10) is then secured by bolts on the square installation base (1-2) on outer casing (1), one end that the middle part of T-shaped rotating shaft (11) is stretched out connects one end of valve body pull bar and spherical plain bearing rod end (13) by the second hinging pin shaft (23), the other end of valve body pull bar and spherical plain bearing rod end (13) connects the cylindrical body boss (14-1) on valve body (14), and fastening by the second tightening nut (24), the other end of T-shaped rotating shaft (11) is matched with stick roller bearing (12) by T-shaped rotating shaft first cylindrical body (11-3), stick roller bearing (12) is fixed on the stick roller bearing installation base (15-2) of core drive fan casing (15) by the second circlip (25), linear bearing (16) to be coordinated with the projection (17-1) on linear bearing U-shaped frame (17) by groove (16-1) and is connected, linear bearing U-shaped frame (17) then by being connected with valve body (14) with the cooperation of linear bearing mounting blocks (22), simultaneously linear bearing (16) frame in along engine shaft to linear bearing support (18) on, linear bearing (16) and associated components thereof rotate for retraining valve body (14) circumference, reduce valve body (14) along the frictional force in motor axial movement simultaneously, make valve body (14) can stably along motor axial motion.
2. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, is characterized in that: described 4 cover driving mechanisms are uniform along outer casing (1) circumference, eachly stagger 90 °.
3. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, is characterized in that: described outer casing (1) is thin-wall barrel, has different diameters along engine shaft to different positions, thin-wall barrel is processed with cylindrical body boss (1-1), pressurized strut cylindrical shell joint shaft bearing (3-1) is fixed on the cylindrical body boss (1-1) on outer casing (1), cylindrical body boss (1-1) is processed with screw thread, first tightening nut (2) fastening pressurized strut cylindrical shell joint shaft bearing (3-1) can be passed through, this design allows pressurized strut cylindrical shell (3) can do the oscillating motion of several angle around the central axis of cylindrical body boss (1-1), ensure that the feasibility of mechanism, avoid pressurized strut cylindrical shell (3) issuable mount stress simultaneously, casing (1) needs the anchor ring of installation two row ball bearing (9) circumferentially has circular hole equably outside simultaneously, and be processed with the square installation base (1-2) matched with two row ball bearing bearing cap (10), square installation base (1-2) is processed with everywhere uniform bolt hole is as location fastener hole simultaneously, and circular hole and square installation base (1-2) are in order to install two row ball bearing (9) and two row ball bearing bearing cap (10).
4. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, it is characterized in that: described core drive fan casing (15) is thin-wall barrel, different stage positions has different diameters, the cylndrical surface that core drive fan casing (15) coordinates with the part of valve body (14) front end is processed with groove (15-1), in order to install elastic seal ring (21); The position that square installation base (1-2) upper with outer casing (1) is corresponding is in the circumferential processed with stick roller bearing installation base (15-2), stick roller bearing installation base (15-2) is similar with the shape of two row ball bearing bearing cap (10), also with convex shoulder and circlip mounting groove, convex shoulder installs stick roller bearing (12) in order to coordinate the second circlip (25); Oblique cylindrical shell near groove (15-1) is processed with the first square boss (15-3), described first square boss is processed with the first square boss first through hole (15-4) coordinated with linear bearing support (18) and the first square boss second through hole (15-5) matched with linear bearing rack ventilating hole (18-1); The mounting edge of core drive fan casing (15) is processed with the second square boss (15-6), second square boss (15-6) is processed with the second square boss through hole (15-7), in order to match with the through hole (19-1) on linear bearing support installing limit.
5. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, it is characterized in that: the straight rod member (6-1) of described connecting rod (6) to be an intermediate section cross section be rectangle, straight rod member (6-1) one end is connected with the cylindrical body (6-2) with interior six prism fitting surfaces, the other end is then connected with the lug (6-3) that can be connected pressurized strut spherical plain bearing rod end (4-1) by the first hinging pin shaft (5), lug (6-3) is that two bottoms are rectangular, head has the structure of semi-cylindrical hill, and in the middle part of two semi-cylindrical hills, have the through hole be positioned on same axis, for being fixedly connected with of the first hinging pin shaft (5).
6. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, it is characterized in that: described T-shaped rotating shaft (11) is a global shape is T-shaped transmission part, main body is hollow cylindrical body (11-1), and hollow cylindrical body (11-1) two ends are respectively the outer six prism ligands (11-2) coordinated with connecting rod (6) and T-shaped rotating shaft first cylindrical body (11-3) coordinated with stick roller bearing (12) and T-shaped rotating shaft first shaft shoulder (11-4); Intermediate portion is designed with near the one end be connected with connecting rod (6) T-shaped rotating shaft second cylindrical body (11-5) and T-shaped rotating shaft second shaft shoulder (11-6) that coordinate with two row ball bearing (9); Intermediate portion draws near the one end coordinated with stick roller bearing (12) straight rod member (11-7) that cross section is rectangle, also be the lug (11-8) of a shape as connecting rod (6) one end at the end of rod member, in order to connect valve body pull bar spherical plain bearing rod end (13-2) and the second hinging pin shaft (23).
7. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, it is characterized in that: the bearing-mounted parts of described two row ball bearing bearing cap (10) to be a main body be hollow cylinder (10-1), the hollow cylinder (10-1) at center is with convex shoulder (10-3) and circlip mounting groove (10-4), and convex shoulder (10-3) can coordinate with the first circlip (7) and sleeve (8) stablizes two row ball bearing (9); And have the square stage body (10-2) of uniform bolt hole everywhere in hollow cylinder (10-1) external process, thus can be fastened by bolts with the upper square installation base (1-2) of outer casing (1).
8. the peaceful dynamic formula front duct ejector of pull rod shaft in variable cycle engine adjusting mechanism according to claim 1, is characterized in that: described valve body (14) is a thin-walled cylindrical workpiece through cutting, is the non-domain structure of part; Valve body (14) has circumference equally distributed 4 to the cell body (14-2) coordinated with linear bearing U-shaped frame (17), and the cylindrical body boss (14-1) be connected with valve body pull bar and spherical plain bearing rod end (13) is processed with at equally distributed circumferential 4 places, cylindrical body boss (14-1) is processed with screw thread, can the second tightening nut (24) fastening valve body pull bar spherical plain bearing rod end (13-2) be passed through; Valve body (14) front end reduces aerodynamic loss by fillet process; Cell body (14-2) part that upper 4 places' cylindrical body boss (14-1) parts of valve body (14) only reservation circumference and valve body (14) coordinate with linear bearing U-shaped frame (17) is simultaneously cut, and other positions are in the circumferential cut, to alleviate the weight of valve body (14) under guarantee meets the obstruction conditions of runner.
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| CN201410168707.3A CN103925115B (en) | 2014-04-24 | 2014-04-24 | The peaceful dynamic formula front duct ejector of pull rod shaft in a kind of variable cycle engine adjusting mechanism |
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| CN108561243B (en) * | 2017-12-27 | 2020-06-09 | 中国航发四川燃气涡轮研究院 | Driving structure for adjusting area of culvert |
| CN109611237B (en) * | 2018-11-30 | 2020-05-22 | 北京航空航天大学 | Memory alloy driven front duct ejector of variable cycle engine adjustable mechanism |
| CN109973243B (en) * | 2019-04-04 | 2021-09-03 | 中国航发沈阳发动机研究所 | Variable cycle engine ejector valve driving mechanism |
| CN113401342B (en) * | 2021-06-28 | 2023-07-25 | 深圳悟空飞行器有限公司 | Ducted fan wing |
| CN114810416B (en) * | 2022-06-27 | 2022-09-23 | 中国航发四川燃气涡轮研究院 | Zigzag variable cycle engine adjustable front duct ejector structure |
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Inventor after: Shen Xiuli Inventor after: Zhao Xin Inventor after: Chen Yuzhu Inventor after: Mao Jianxing Inventor after: Fan Jiang Inventor after: Li Jiao Inventor before: Shen Xiuli Inventor before: Chen Yuzhu Inventor before: Mao Jianxing Inventor before: Fan Jiang Inventor before: Li Jiao |
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Effective date of registration: 20170808 Address after: 100191 Haidian District, Xueyuan Road, No. 37, Co-patentee after: AECC SHENYANG ENGINE Research Institute Patentee after: BEIHANG University Address before: 100191 Haidian District, Xueyuan Road, No. 37, Patentee before: Beihang University |
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