CN103925115A - Pull rod bearing translation-type front duct ejector in variable cycle engine adjustable mechanism - Google Patents
Pull rod bearing translation-type front duct ejector in variable cycle engine adjustable mechanism Download PDFInfo
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Abstract
A pull rod bearing translation-type front duct ejector in a variable cycle engine adjustable mechanism comprises four drive mechanisms and a valve body, wherein each drive mechanism comprises a hydraulic actuation barrel, a connection rod, a double-row rolling ball bearing, a double-row rolling ball bearing cover, a T-shaped rotary shaft, a rolling-rod bearing, a valve body pull rod, a rod end knuckle bearing, a linear bearing and a linear bearing U-shaped frame. The area of a flow channel which is behind a core drive fan stage and extends in the direction of an outer duct can be accurately changed according to requirements of pneumatic design, the cycle state of a variable cycle engine is changed due to the fact that the variable cycle engine adjustable mechanism is matched with other adjustable mechanisms, and the ejector has the advantages of high maintenance performance, high reliability, long service life and good economical 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, belong 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 on same motor the gas turbine engine that can realize different thermodynamic cycles by the change of geometrical shape, size or the position of some parts of motor.
From motor theory: the supersonic performance of turbojet engine is good, and specific thrust is large, and when high Mach flight, oil consumption rate is relatively low; Turbofan engine has good subsonic speed performance, and when 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 be according to the difference of flying condition, make motor between single duct turbojet or two kinds of different mode of operations of two duct turbofan formulas, carry out the change of recurrent state thereby reasonably change bypass ratio by regulating for how much of multiple parts, reach the object that has 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 pattern changing 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 process that changes thermodynamic cycle by changing core drive fan level to the Flow area between by-pass air duct, coordinating other controlling mechanisms to complete variable cycle engine.
External variable cycle engine design is started in 20 century 70s, has developed the validator of realizing this change recycle scheme at present.And domestic variable cycle engine is designed this century and just starts to carry out, also in becoming the conceptual phase of circulation theory.
US Patent No. 4175384 discloses a kind of front duct ejector structure, and its actuator by being built in core drive fan casing realizes to promoting valve body the variation that valve can state of a control along engine shaft.Actuator's structural type of this patent scheme is simple, does device and is placed in core drive fan casing, has saved space, simultaneously only need be in by-pass air duct insertion portion hydraulic tubing, do not affect to a certain extent the aeroperformance of by-pass air duct.But the scheme that this patent provides is built in actuator in core drive fan casing and can affects maintenance and the installation of mechanism, thereby can affect to a great extent Economy.
US Patent No. 4068471 discloses a kind of front duct ejector structure, and it provides power by the actuator that is built in core drive fan casing, by providing the mode of effective torque that valve sheet is rotated around immovable point, realizes the variation of Flow area.The structural type that this patent scheme is used is comparatively simple, can only use the effect of a winding machine pattern changing valve and two adjustable mode switching mechanisms of front duct ejector.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, therefore simultaneously pressurized strut is built in the problem that also exists maintenance in core drive fan casing and install, generally speaking scheme feasibility is not high.
Chinese patent 200920277530-X discloses a kind of front duct ejector structure, and what its use was placed in by-pass air duct does device along engine shaft to the thin-walled valve body promoting through design, realizes the variation that valve can state of a control, changes Flow area.This patent scheme is used first injection, and the valve body device of rear flat fire thin-walled cartridge type can make Gas Mixing in Cross flow comparatively mild, has higher pneumatic efficiency; Whole mechanism structure is simple simultaneously, and number of parts is few, lightweight, and reliability is high.But this scheme is arranged more parts in air-flow path, particularly translation centrum has occupied a larger part for by-pass air duct, and the aeroperformance of by-pass air duct is produced to certain influence, and vibration problem may appear in the thin-walled valve body after simultaneously adopting fulcrum to lean on.
To sum up, there is following some deficiency in prior art: (1) maintenance existing problems, cost is higher.Be mainly reflected in pressurized strut is placed in runner or core drive fan casing in, under actual conditions, more difficult realization is installed, once and mechanism break down, when maintenance, need to carry out the large-scale dismounting of motor, increased cost.(2) affect the pneumatic efficiency of motor prototype.The front duct ejector mechanism being 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 has affected pneumatic efficiency largely.(3) make the design of valve body (sheet) stable operation.Be mainly reflected in and do not design being connected or bridging arrangement between valve body (sheet) and core drive fan casing, only change the axial position (or by opening and closing angle of simple moment transmission change valve sheet) of valve body by the simple axial motion of pressurized strut.(4) more difficult realization accurately regulates.Be mainly reflected in and adopt the 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, the aeroperformance that impact is calculated.
Summary of the invention
The problem that technology of the present invention solves is: the maintenance cost that overcomes prior art patent is high, affect the pneumatic efficiency of motor prototype, and be difficult to shortcoming of working 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, can change exactly the Flow area that flows to by-pass air duct after core drive fan level according to the requirement of pneumatic design, coordinate other adjusting mechanisms 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 pull rod shaft in a kind of variable cycle engine adjusting mechanism, comprise 4 cover driving mechanism and valve bodies, every cover driving mechanism comprises respectively hydraulic actuator, connecting rod, two row ball bearing, two row ball bearing bearing cap, the rotating shaft of T font, stick roller bearing, valve body pull bar and spherical plain bearing rod end, linear bearing and linear bearing U-shaped frame; Described hydraulic actuator comprises pressurized strut cylindrical shell and pressurized strut rod member; Pressurized strut cylindrical shell is realized 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 cylindrical body and the outer six prism ligands of T font rotating shaft of interior six prism fitting surfaces, this end of T font rotating shaft simultaneously also matches by T font rotating shaft the second cylindrical body with two row ball bearing, and realized the radial location of connecting rod and two row ball bearing 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 secured by bolts on the square installation base on outer casing; One end that stretch out at the middle part of T font rotating shaft 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 font rotating shaft matches with stick roller bearing by T font rotating shaft the first cylindrical body; Stick roller bearing is fixed on by the second circlip on the stick roller bearing installation base of core drive fan casing; Linear bearing is coordinated and is connected with projection on linear bearing U-shaped frame by groove, and linear bearing U-shaped frame is by being connected with valve body with the cooperation of linear bearing mounting blocks, while linear axis bolster in along engine shaft to linear bearing support on.Linear bearing and associated components thereof are used for retraining valve body and circumferentially rotate, and reduce the frictional force of valve body in along engine shaft to movement process simultaneously, make the valve body can be stably along motor axial motion.
Described 4 cover driving mechanisms are circumferentially uniform along outer casing, eachly stagger 90 °.
Described outer casing is thin-wall barrel, has different diameters along engine shaft to different positions; On thin-wall barrel, be processed with cylindrical body boss, pressurized strut cylindrical shell joint shaft bearing is fixed on the cylindrical body boss on outer casing, on cylindrical body boss, be processed with screw thread, can pass through the fastening pressurized strut cylindrical shell of the first tightening nut joint shaft bearing, this design allows pressurized strut cylindrical shell can do around the central axis of cylindrical body boss the oscillating motion of several angle, guarantee the feasibility of mechanism, avoided the issuable installation stress of pressurized strut cylindrical shell simultaneously; Simultaneously casing need to be installed on the anchor ring of two row ball bearing along circumferentially having equably circular hole outside, and be processed with the square installation base matching with two row ball bearing bearing cap, on square installation base, be processed with that uniform bolt hole is as location fastener hole everywhere, circular hole and square installation base are in order to install two row ball bearing and two row ball bearing bearing cap simultaneously.
Described core drive fan casing is thin-wall barrel, and different stage positions has different diameters, on the cylndrical surface coordinating, is processed with groove in order to elastic seal ring to be installed at it with the part of valve body front end; Upwards the position corresponding with square installation base on outer casing be processed with stick roller bearing installation base in week, 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 is in order to coordinate the second circlip that stick roller bearing is installed; Being processed with the first square boss near on the oblique cylindrical shell of groove, on boss, be processed with and first square boss the first through hole of linear bearing support assorted and first square boss the second through hole matching with linear bearing rack ventilating hole; On the mounting edge of core drive fan casing, be processed with the second square boss, 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 mounting edge.
Described connecting rod is a straight rod member that intermediate section cross section is rectangle, straight rod member one end is connected with the cylindrical body with interior six prism fitting surfaces, the other end is connected with the lug that can connect by the first hinging pin shaft pressurized strut rod member spherical plain bearing rod end, lug is two structures that bottom is rectangular, head has semi-cylindrical hill, and have at two semi-cylindrical hill middle parts the through hole being positioned on same axis, for being fixedly connected with of the first hinging pin shaft.
The rotating shaft of described T font is a transmission part that global shape is T font, main body is hollow cylindrical body, and hollow cylindrical body two ends are respectively the outer six prism ligands that coordinate with connecting rod and T font rotating shaft the first cylindrical body coordinating with stick roller bearing and T font rotating shaft first shaft shoulder; Intermediate portion is designed with near the one end being connected with connecting rod T font rotating shaft the second cylindrical body and T font rotating shaft second shaft shoulder that coordinate with two row ball bearing; Intermediate portion draws near the one end coordinating with stick roller bearing the straight rod member that cross section is rectangle, is also that a shape is 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 at the end of rod member.
Described two row ball bearing bearing cap is the bearing assembly that a main body is hollow cylinder, and the hollow cylinder at center is with convex shoulder and circlip mounting groove, and convex shoulder can coordinate and stablize two row ball bearing with the first circlip and sleeve; And be processed with the square stage body of uniform bolt hole everywhere at hollow cylinder peripheral, thereby can pass through bolton 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; On valve body, have circumferentially equally distributed 4 pairs of flutings that coordinate with linear bearing U-shaped frame, and be processed with at equally distributed circumferential 4 places the cylindrical body boss being connected with valve body pull bar and spherical plain bearing rod end, on cylindrical body boss, be processed with screw thread, can pass through the fastening valve body pull bar of the second tightening nut spherical plain bearing rod end; Valve body front end has reduced aerodynamic loss by fillet processing; Simultaneously valve body only retain week upwards 4 place's cylindrical body projection sections and valve body cut with the cell body part that linear bearing U-shaped frame coordinates, and week the condition of blocking that met runner in guarantee of other positions upwards cut, to alleviate the weight of valve body.
Described linear bearing is standard piece, and outer shroud is processed with the groove coordinating with linear bearing U-shaped frame projection, 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 and the projection of 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, be processed with through hole at two ends, two ends through hole is respectively in order to position and to coordinate with first square boss the first through hole of processing on core fans drive casing and linear bearing support mounting edge third through-hole, and with bolt, nut check.
Described linear bearing support mounting edge is one to be processed with the connected element of three place's through holes, three place's through holes---linear bearing support mounting edge the first through hole, linear bearing support mounting edge the second through hole and linear bearing support mounting edge third through-hole match with through hole and linear bearing support on the second square boss through hole, linear bearing support on core fans drive casing respectively, and coordinate and locate with bolt, front two places of nut check.
Described elastic seal ring is one to have the graphite seal circle of opening, can be arranged in the groove on core drive fan casing, and realize the internal surface that its outer ring surface is close to valve body, in playing sealing effect, can serve as the fulcrum of valve body along motor axial motion.
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, is processed with two through holes that coordinate with the hole of opening on linear bearing U-shaped frame on relative two sides, and fastening with bolt and nut.
The advantage that the present invention compared with prior art has is as follows:
(1) maintenance that the present invention has had.Be mainly manifested in hydraulic actuator is placed on to outer casing, can in the situation that not dismantling outer casing, carry out the maintenance task such as replacing, the cleaning oil pollution of pressurized strut cylindrical shell of pressurized strut rod member.
(2) working stability that the present invention has had.Be mainly manifested in by parallel quadruplet pushing mechanism and promote valve body, in the situation that a set of mechanism goes wrong therein, other mechanisms still can realize the function of front duct ejector.Adopt two row ball bearing and stick roller bearing to support the rotating shaft of T font simultaneously, ensured not stable rotation prejudicially of T font rotating shaft; Adopt linear bearing to connect the linear bearing support supporting on valve body and core drive fan casing, define the movement locus of valve body, realized valve body reposefully along motor axial motion, reduced the surface friction drag of valve body motion simultaneously; Adopt many places joint shaft bearing only in mechanism, to introduce isolated degree of freedom, can avoid installing time, occur larger installation stress, even if can make can stably move under the prerequisite that has several angle between member simultaneously; Between connecting rod and rotating shaft, adopt the incompatible transmission force and moment of six prism close-fittings, simple and reliable for structure; Directly adopt throttle type valve body, be difficult for occurring valve body vibration problem.
(3) the present invention has reduced the impact of the pneumatic efficiency of mechanism on 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, reduced the pressure loss of air-flow; Valve body front end is carried out to fillet processing, made air-flow streamline comparatively mild, reduced the out-of-date aerodynamic loss of air flow stream; Use elastic seal ring, reduced the gas flowing through from intension and pass back into by-pass air duct by the space of valve body and core drive fan casing, improved pneumatic efficiency.
(4) the present invention has considered the problem that affects of the weight of mechanism on motor.Be mainly reflected in valve body has been carried out to part cutting, under the prerequisite that realizes its function of blocking runner, reduced largely its weight (calculating shows to reduce the valve weight of 30% left and right); The body cylindrical body partial design of rotating shaft is become to hollow structure, in ensureing its normal work, reduce its weight.
Brief description of the drawings
Fig. 1 is the part two dimension front view of adjustable front duct ejector of the present invention;
Fig. 1 a is the part two dimension front view zoomed-in view 1 of adjustable front duct ejector of the present invention;
Fig. 1 b is the part two dimension front view zoomed-in view 2 of adjustable front duct ejector of the present invention;
Fig. 2 is the part two dimension plan view of adjustable front duct ejector of the present invention;
Fig. 3 is the part 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 T font of the present invention rotating shaft;
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 the 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 the first cylindrical body, 11-4.T font rotating shaft first shaft shoulder, 11-5.T font rotating shaft the 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 the first through hole, 15-5. first square boss the second through hole, 15-6. the second square boss, 15-6. the second square boss through hole, 16. linear bearings, the groove that 16-1. coordinates with linear bearing U-shaped frame projection, 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 mounting edges, 19-1. linear bearing support mounting edge the first through hole, 19-2. linear bearing support mounting edge the second through hole, 19-3. linear bearing support mounting edge 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 in outer casing 1 by pressurized strut cylindrical shell joint shaft bearing 3-1, and fastening by the first tightening nut 2, one end of pressurized strut rod member 4 with and pressurized strut cylindrical shell 3 match, 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 connected with the outer six prism ligand 11-2 of T font rotating shaft 11 by interior six prism fitting surfaces, 11 of T font rotating shafts are stable by two row ball bearing 9 and stick roller bearing 12, and be connected with one end of valve body pull bar and spherical plain bearing rod end 13 by the second hinging pin shaft 23 at its lug 11-5 place, the other end of valve body pull bar and spherical plain bearing rod end 13 is connected to by the second tightening nut 24 on the cylindrical body boss 14-1 welding on valve body 14, two row ball bearing 9 is retrained and is arranged in two row ball bearing bearing cap 10 everywhere by convex shoulder 10-3 and the sleeve 8 of the first circlip 7, T font rotating shaft the second shaft shoulder 11-6, two row ball bearing lid, and 10 of two row ball bearing bearing caps are by bolton 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 font rotating shaft the first shaft shoulder 11-4 and core drive fan casing, linear bearing 16 is coordinated and is connected with the protruding 17-1 on linear bearing U-shaped frame 17 by groove 16-1, linear bearing U-shaped frame 17 is after the fluting 14-2 through on valve body 14, pass through coordinating of processed through hole 17-2 and the through hole 22-1 processing on linear bearing mounting blocks 22, 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, 16 of linear bearings in along engine shaft to linear bearing support 18 on, linear bearing support 18 through first square boss the first through hole 15-4 on linear bearing support mounting edge third through-hole 19-3 and core drive fan casing 15 along engine shaft on core drive fan casing 15, and coordinate with first square boss the second through hole 15-5 on linear bearing support mounting edge the second through hole 19-2 and core drive fan casing 15 respectively with the two through hole 18-1 of place, carry out fastening with bolt and nut, linear bearing support mounting edge 19 coordinates with the second square boss through hole 15-7 on core drive fan casing 15 by linear bearing support mounting edge the first through hole 19-1, and by bolton on core drive fan casing 15.Elastic seal ring 20 is arranged in the groove 15-1 on core drive fan casing 15, and coordinates with valve body 14 by outer ring surface.Valve body 14 by 20 liang of linear bearing 16 and associated components thereof and elastic packing back-up rings everywhere locate 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:
Chamber, the front and back oil pressure that the present invention is arranged in the cylindrical shell of pressurized strut everywhere 3 outside outer casing 1 by change is simultaneously poor, makes quadruplet driving mechanism drive valve body simultaneously, and the specific works process of every cover driving mechanism is as described below.Chamber, the front and back poor change of oil pressure of pressurized strut cylindrical shell 3 makes 4 starts of pressurized strut rod member, and drivening rod 6 rotates around the center line of outer six prisms of T font rotating shaft 11; Connecting rod 6 is coordinated and is driven T font rotating shaft 11 to rotate by six prisms; T font 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, and valve body 14 is under linear bearing 16 and the common circumferential constraint forming of 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, thereby changes engine operational cycle parameter, reaches the regulation and control object that makes variable cycle engine enter different thermodynamic cycle states.
As shown in Figure 4, outer casing 1 is thin-wall barrel, there is different diameters along engine shaft to different positions, on the anchor ring of casing 1 need installation two row ball bearing, edge circumferentially has the 4 isodiametric circular holes in place equably outside, and be processed with the 4 places squares installation base 1-2 that match with two row ball bearing bearing cap 10, on each boss, have the location fastener hole of 4 bolts hole as two row ball bearing bearing cap 10,4 place's circular holes and square boss are in order to install two row ball bearing 9 and two row ball bearing bearing cap 10 simultaneously.Casing 1 is circumferentially processed with the 4 cylindrical body boss 1-1 of place equably in order to install on the anchor ring of pressurized strut cylindrical shell 3 outside, in order to pressurized strut cylindrical shell joint shaft bearing 2 to be installed, and be processed with screw thread on cylindrical body boss 1-1, in order to connect the first tightening nut 2 of fastening pressurized strut.This design permission pressurized strut cylindrical shell 3 can do around the central axis of cylindrical body boss 1-1 the oscillating motion of several angle, has guaranteed the feasibility of mechanism, has avoided the issuable installation 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, on the cylndrical surface coordinating, is processed with groove 15-1 in order to elastic seal ring 21 to be installed at it with the part of valve body 14 front ends; Be processed with stick roller bearing installation base 15-2 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 is in order to coordinate the second circlip 25 that stick roller bearing 12 is installed; Being processed with the first square boss 15-3 near on the oblique cylindrical shell of groove 15-1, on boss, be processed with first square boss the first through hole 15-4 coordinating with linear bearing support 18 and first square boss the second through hole 15-5 matching with linear bearing rack ventilating hole 18-1; On the mounting edge of core drive fan casing 15, be processed with the second square boss 15-6, 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 mounting edge, and adopts bolt and nut fastening.
Hydraulic actuator used in the present invention is aeroengine hydraulic actuator, and it is mainly made up 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 provide different oil pressure that pressurized strut rod member 4 is done to ante-chamber and back cavity.Pressurized strut cylindrical shell 3 is connected with pressurized strut cylindrical shell joint shaft bearing 3-1, thereby realizes fixing between hydraulic actuator and outer casing 1 by the first tightening nut 2 to pressurized strut cylindrical shell joint shaft bearing 3-1 is fastening.Realized pressurized strut cylindrical shell 3 simultaneously and rotated around pressurized strut cylindrical shell joint shaft bearing 3-1, guaranteed body function realization, thereby avoid occurring that larger installation stress affect the function realization of sleeve mechanism.As shown in Figure 7, pressurized strut rod member 4 is the different cylindrical body rod member of diverse location radius, the power providing in order to transmit pressurized strut front and back oil pocket pressure reduction, and 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 of direction, in bearing radial load, can bear the thrust load that either direction is less than or equal to 0.2 times of 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 pressurized strut rod member 4 and connecting rod 6 is stable is connected and around this some rotation, avoids occurring when mounted larger stress.
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 to be 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 is to be connected T font rotating shaft 11 and valve body pull bar and spherical plain bearing rod end 13 by the through hole on the lug 11-8 of T font rotating shaft 11 with valve body pull bar spherical plain bearing rod end 13-2, connection by two place's hinging pin shafts and spherical plain bearing rod end is fastening, and two groups of driving links can stably rotate around the center line of hinging pin shaft.
As shown in Figure 9, connecting rod 6 is the straight rod member 6-1 that an intermediate section cross section is rectangle, one end is connected with the cylindrical body 6-2 with interior six prism fitting surfaces, the other end is 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 have at two semi-cylindrical hills middle part the through hole 6-4 being 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, and the second cylindrical body 11-5 matches with the rotating shaft of T font.Its effect is to ensure that T font rotating shaft 11 rotation axis in the time that rotation is stressed keeps stable.
As shown in figure 11, two row ball bearing bearing cap 10 is bearing assemblys that a main body is 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 and stablize two row ball bearing 9 with the first circlip 7 and sleeve 8; And 10-1 outside is welded with the square stage body 10-2 that is processed with uniform bolt hole everywhere in cylindrical body, thereby can pass through bolton with square installation base 1-2 on outer casing 1.
As shown in figure 12, T font rotating shaft 11 is the transmission paries that global shape is T font, 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 that coordinate with connecting rod 6 and T font rotating shaft the first cylindrical body 11-3 coordinating with stick roller bearing 12 and T font rotating shaft the first shaft shoulder 11-4; Intermediate portion is designed with near the one end being connected with connecting rod 6 T font rotating shaft the second cylindrical body 11-5 and T font rotating shaft the second shaft shoulder 11-6 that coordinate with two row ball bearing 9; Intermediate portion draws near the one end coordinating with stick roller bearing 12 the straight rod member 11-7 that cross section is rectangle, is also that a shape is as the lug 11-8 of 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.Thereby the rotating shaft 11 of T font under the drive of connecting rod 6, transmit force and moment by be connected with one end of valve body pull bar and spherical plain bearing rod end 13 drive 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, can coordinate two row ball bearing 9 to ensure that T font rotating shaft 11 rotation axis in the time that rotation is 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 is to connect T font 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; On valve body 14, be processed with circumferential equally distributed 4 pairs and coordinate cell body 14-2 with linear bearing U-shaped frame 17, and at the circumferential equally distributed 2 sections of cylindrical body boss 14-1 that are connected with valve body pull bar and spherical plain bearing rod end 13 that are processed with everywhere, on cylindrical body boss 14-1, be processed with screw thread, can pass through the fastening valve body pull bar of the second tightening nut 24 spherical plain bearing rod end 13-2; Valve body 14 front ends have reduced aerodynamic loss by fillet processing; The cell body 14-2 part that valve body only retains all upwards 4 cylindrical body boss 14-1 of place partly and valve body 14 coordinates with linear bearing U-shaped frame 17 is simultaneously cut, and week other positions upwards ensureing that the condition of blocking that has met runner cuts, to alleviate valve body 14 weight.The effect of valve body 14 is requirements of blocking to meet pneumatic design of carrying out motor runner, is the critical component of 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 coordinating with linear bearing U-shaped frame projection 17-1, in order to location.16 of linear bearings, on linear bearing support 18, and are connected with valve body 14 by parts such as linear bearing U-shaped frame 17 and linear bearing mounting blocks 22, have ensured that valve body 14 can be 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 coordinating 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 has been realized being connected of linear bearing 16 and valve body 14, has realized the feasibility of mechanism.
As shown in figure 18, described linear bearing support 18 is a body length rod member, be processed with through hole 18-1 at two ends, two ends through hole is respectively in order to position and to coordinate with first square boss the first through hole 15-5 processing on core fans drive casing and linear bearing support mounting edge third through-hole 19-3, 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 mounting edge 19 is one to be processed with the connected element of three place's through holes, three place's through holes---linear bearing support mounting edge the first through hole 19-1, linear bearing support mounting edge the second through hole 19-2 and linear bearing support mounting edge third through-hole 19-3 match with through hole 18-1 and linear bearing support 18 on the second square boss through hole 15-6, linear bearing support 18 on core fans drive casing 15 respectively, and coordinate and locate with bolt, front two places of nut check.Linear bearing support mounting edge 19 is to realize 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, is processed with two through hole 22-1 that coordinate with the hole 17-2 that opens on linear bearing U-shaped frame 17 on relative two sides, and fastening with bolt and nut.Linear bearing mounting blocks 22 has been realized being connected between linear bearing 16, linear bearing U-shaped frame 17 and valve body 14.
Wherein, circumferentially uniform 4 of hydraulic actuators, stagger 90 °; Joint shaft bearing has 16 everywhere; Circumferentially uniform 4, connecting rod 6, staggers 90 °; Circumferentially uniform 4 of T font rotating shafts 11, stagger 90 °; Circumferential uniform 4 respectively of two row ball bearing 9 and stick roller bearing 11, 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 to this, in the technical scope that any those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in 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), every cover driving mechanism comprises respectively hydraulic actuator, connecting rod (6), two row ball bearing (9), two row ball bearing bearing cap (10), T font 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), described hydraulic actuator comprises pressurized strut cylindrical shell (3) and pressurized strut rod member (4), pressurized strut cylindrical shell (3) is realized fixing between itself and outer casing (1) by pressurized strut cylindrical shell joint shaft bearing (3-2) 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) is closely connected with the outer six prism ligands (11-2) of T font rotating shaft (11) with the cylindrical body (6-2) of interior six prism fitting surfaces, this end of T font rotating shaft (11) simultaneously also matches by T font rotating shaft the second cylindrical body (11-5) with two row ball bearing (9), and realized the radial location of connecting rod (6) and two row ball bearing (9) 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 secured by bolts on the square installation base on outer casing (1) (1-2), one end that stretch out at the middle part of T font rotating shaft (11) 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 tightening nut (2), the other end of T font rotating shaft (11) matches with stick roller bearing (12) by T font rotating shaft the first cylindrical body (11-3), stick roller bearing (12) is fixed on by the second circlip (25) on the stick roller bearing installation base (15-2) of core drive fan casing (15), linear bearing (16) is coordinated and is connected with the projection (17-1) on linear bearing U-shaped frame (17) by groove (16-1), linear bearing U-shaped frame (17) is 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 are used for retraining valve body (14) and circumferentially rotate, reduce the frictional force of valve body (14) in along engine shaft to movement process simultaneously, make the valve body (14) can be 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 circumferentially uniform along outer casing (1), 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, on thin-wall barrel, be processed with cylindrical body boss (1-1), pressurized strut cylindrical shell joint shaft bearing (3-2) is fixed on the cylindrical body boss (1-1) on outer casing (1), on cylindrical body boss (1-1), be processed with screw thread, can pass through the first tightening nut (2) fastening pressurized strut cylindrical shell joint shaft bearing (3-2), this design allows pressurized strut cylindrical shell (3) can do around the central axis of cylindrical body boss (1-1) oscillating motion of several angle, guarantee the feasibility of mechanism, avoided the issuable installation stress of pressurized strut cylindrical shell (3) simultaneously, simultaneously casing (1) need to be installed on the anchor ring of two row ball bearing (9) along circumferentially having equably circular hole outside, and be processed with the square installation base (1-2) matching with two row ball bearing bearing cap (10), on square installation base (1-2), be processed with that uniform bolt hole is as location fastener hole everywhere, 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) simultaneously.
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, is processed with groove (15-1) in order to elastic seal ring (21) to be installed at it near on the cylndrical surface coordinating with the part of valve body (14) front end; Upwards go up the corresponding position of square installation base (1-2) with outer casing (1) in week and be 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 is in order to coordinate the second circlip (25) that stick roller bearing (12) is installed; Be processed with the first square boss (15-3) near on the oblique cylindrical shell of groove (15-1), on boss, be processed with first square boss the first through hole (15-4) coordinating with linear bearing support (18) and first square boss the second through hole (15-5) matching with linear bearing rack ventilating hole (18-1); On the mounting edge of core drive fan casing (15), be processed with the second square boss (15-6), 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 mounting edge.
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: described connecting rod (6) is the straight rod member (6-1) that an intermediate section cross section is 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 connected with the lug (6-3) that can connect by the first hinging pin shaft (5) pressurized strut rod member spherical plain bearing rod end (4-1), lug (6-3) is that two bottoms are rectangular, head has the structure of semi-cylindrical hill, and have at two semi-cylindrical hill middle parts the through hole (6-4) being 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 font rotating shaft (11) is a transmission part that global shape is T font, 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) that coordinate with connecting rod (6) and T font rotating shaft the first cylindrical body (11-3) and T font rotating shaft first shaft shoulder (11-4) coordinating with stick roller bearing (12); Intermediate portion is designed with near the one end being connected with connecting rod (6) T font rotating shaft the second cylindrical body (11-5) and T font rotating shaft second shaft shoulder (11-6) that coordinate with two row ball bearing (9); Intermediate portion is drawn the straight rod member that cross section is rectangle (11-7) near the one end coordinating with stick roller bearing (12), also be that a shape is as the lug (11-8) of 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.
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: described two row ball bearing bearing cap (10) is that a main body is the bearing assembly of 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 and stablize two row ball bearing (9) with the first circlip (7) and sleeve (8); And (10-1) external process has the square stage body (10-2) of uniform bolt hole everywhere in hollow cylinder, thereby can pass through bolton 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; On valve body (14), have circumferentially equally distributed 4 pairs of flutings (14-2) that coordinate with linear bearing U-shaped frame (17), and be processed with the cylindrical body boss (14-1) being connected with valve body pull bar and spherical plain bearing rod end (13) at equally distributed circumferential 4 places, on cylindrical body boss (14-1), be processed with screw thread, can pass through the second tightening nut (24) fastening valve body pull bar spherical plain bearing rod end (13-2); Valve body (14) front end has reduced aerodynamic loss by fillet processing; The cell body (14-2) that simultaneously valve body (14) only retains week upwards 4 place's cylindrical body boss (14-1) parts and valve body (14) coordinate with linear bearing U-shaped frame (17) partly cuts, and week other positions upwards ensureing that the condition of blocking that has met runner cuts, to alleviate the weight of valve body (14).
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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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| CN113401342A (en) * | 2021-06-28 | 2021-09-17 | 深圳悟空飞行器有限公司 | Disc type ducted fan wing |
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| CN114810416A (en) * | 2022-06-27 | 2022-07-29 | 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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