CN104129498A - Rotor wing control mechanism for coaxial helicopter - Google Patents
Rotor wing control mechanism for coaxial helicopter Download PDFInfo
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- CN104129498A CN104129498A CN201410353728.2A CN201410353728A CN104129498A CN 104129498 A CN104129498 A CN 104129498A CN 201410353728 A CN201410353728 A CN 201410353728A CN 104129498 A CN104129498 A CN 104129498A
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- rocker arm
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Abstract
The invention discloses a rotor wing control mechanism for a coaxial helicopter. The mechanism comprises an outer shaft, an inner shaft, an inner and outer shaft supporting base, an outer automatic tilting device, an inner automatic tilting device, a middle ring, a third connecting device, a plurality of lower pull rods, a plurality of first connecting devices, a plurality of lower horizontal rods, a plurality of second connecting devices, a plurality of lower rotor wing propeller hubs which are mounted on the propeller hub head of the outer shaft, a plurality of upper rotor wing propeller hubs which are mounted on the propeller hub head of the inner shaft, a plurality of upper rotor wing variable-pitch rocker arms which are connected with the inner ends of the upper rotor wing propeller hubs, and a plurality of lower rotor wing variable-pitch rocker arms which are connected with the inner ends of the lower rotor wing propeller hubs. Lower rotor wing control mechanisms are distributed into a helicopter body fairing and a lower rotor wing fairing, and upper rotor wing control mechanisms are distributed in a rotor wing shaft. Through the adoption of the mutual matching and control of the lower pull rods and long pull rods, the synchronous control of the total distance, the differential action control of the total distance, and the control of the cyclic variable pitch for an upper rotor wing and a lower rotor wing can be realized through all parts.
Description
Technical field
The present invention relates to Flight Vehicle Design technical field, relate in particular to the rotor control mechanism of coaxal helicopter.
Background technology
Steering unit is the important component part of helicopter, and chaufeur must be controlled by maneuvering system the flight of helicopter, keeps or change the state of equilibrium of helicopter.Coaxal helicopter is a kind of rotor class aircraft of upper and lower two pairs around coaxial line contrarotation rotor that have.Because coaxal helicopter has upper and lower two secondary rotors, its rotor control system is more more complicated than pure helicopter.
General single-rotor helicopter propeller hub resistance accounts for 20%～30% of always useless resistance of helicopter, and coaxal helicopter has two propeller hubs, and propeller hub resistance accounts for the more than 50% of total useless resistance.Along with the raising of flying speed, fuselage resistance can further reduce after drag reduction design, and propeller hub resistance accounts for total proportion meeting hindering of giving up and further rises, and hinders very important so reduce propeller hub resistance to reducing always giving up of helicopter.According to current technology, coaxal helicopter rotor control mechanism is in rotor shaft outside, and wind area is large, and is difficult to propeller hub to take drag reduction measure, is difficult to reduce rotor system resistance.Therefore, be necessary to improve the steering unit of coaxal helicopter, to reduce rotor system resistance.
Summary of the invention
The technical matters that the present invention solves: overcome the deficiencies in the prior art, a kind of rotor control mechanism for coaxal helicopter is provided, and steering unit is rationally distributed, compact, manoeuvrable, does not expose, can effectively reduce the useless resistance of coaxal helicopter, improve helicopter performance.
Technical scheme of the present invention is: a kind of rotor control mechanism for coaxal helicopter, is characterized in that: comprise lower link, the first connecting device, sheer pole, the second connecting device that outer shaft, interior axle, interior outer shaft supporting seat, outer auto-bank unit, interior auto-bank unit, adapter ring, the 3rd connecting device and quantity are identical, be installed on outer shaft propeller hub head lower rotor hub, be installed on the upper rotor hub of interior axle propeller hub head, the upper rotor distance-variable rocker arm being connected with upper rotor hub the inner, the lower rotor distance-variable rocker arm being connected with lower rotor hub the inner; The inner hollow of inner shaft, outer shaft, interior axle is sleeved in outer shaft by interior outer shaft supporting base, and interior outer shaft supporting base can ensure when interior axle and outer shaft coaxially rotate backward not bump; Outer auto-bank unit is positioned at the below of outer shaft propeller hub head, and is sleeved on outer shaft, and outer auto-bank unit can tilt and can slide up and down along outer shaft to either direction; Lower link is connected on outer auto-bank unit, and while making to move up and down lower link, outer auto-bank unit can run-off the straight or slided up and down; Interior auto-bank unit is positioned at outer shaft propeller hub head inside, and is sleeved on interior axle, and interior auto-bank unit can tilt and can slide up and down along interior axle to either direction; Outer auto-bank unit is connected by the first connecting device with interior auto-bank unit, makes outer auto-bank unit and interior auto-bank unit synchronously to tilt in the same way or synchronously to slide up and down; The first connecting device is connected with lower rotor distance-variable rocker arm simultaneously, and when making outer auto-bank unit run-off the straight or sliding up and down, lower rotor distance-variable rocker arm correspondingly shakes, and then changes lower rotor pitch; Adapter ring is positioned at the top of auto-bank unit, and is sleeved on interior axle; In the joint of interior axle and adapter ring, on interior axle, be provided with the through hole identical with sheer pole quantity, through-hole aperture is greater than the bar footpath of sheer pole; The second connecting device is positioned at axle inside; Sheer pole middle part is connected on adapter ring; The outer end of sheer pole is connected with interior auto-bank unit, the inner of sheer pole is connected with the lower end of the second connecting device through the through hole arranging on interior axle, the upper end of the second connecting device is connected with upper rotor distance-variable rocker arm, by the cooperation of the first connecting device, sheer pole, adapter ring, the second connecting device, can make outer auto-bank unit, interior auto-bank unit synchronously tilt or slide up and down time, upper rotor distance-variable rocker arm and the shake of lower rotor distance-variable rocker arm synchronous backward, and then the upper and lower rotor pitch of synchronous change; Upper rotor distance-variable rocker arm is connected with the 3rd connecting device simultaneously, by moving up and down the 3rd connecting device, can change separately upper rotor pitch and lower rotor is not exerted an influence; While carrying out synchronous manipulation of the total distance of upper and lower rotor, move up and down all lower links simultaneously, outer auto-bank unit, interior auto-bank unit are synchronously slided up and down, the first connecting device is the lower rotor distance-variable rocker arm of synchronously shake thereupon, thereby change the lower total distance of rotor, the second connecting device is the upper rotor distance-variable rocker arm of synchronous backward shake thereupon, thus the total distance of rotor on synchronous change; While carrying out upper and lower rotor always apart from differential manipulation, move up and down all lower links simultaneously, then move up and down the upper rotor rocking arm of the 3rd connecting device shake, thus always distance and lower rotor pitch of rotor in differential change; While carrying out cyclic pitch control, by adjusting the relative position of each lower link, outer auto-bank unit, interior auto-bank unit are synchronously tilted in the same way, the first connecting device is the lower rotor distance-variable rocker arm of synchronously shake thereupon, thereby change lower feather, the second connecting device is the upper rotor distance-variable rocker arm of synchronous backward shake thereupon, thus feather on synchronous change.
Preferably, outer auto-bank unit, interior auto-bank unit include ball pivot, interior ring, bearing, outer shroud; Inner ring sleeve is contained on ball pivot and can tilts to either direction around ball pivot, and interior ring, outer shroud are connected by bearing; The ball pivot of outer auto-bank unit is sleeved on outer shaft and can slides up and down along outer shaft, and the ball pivot of interior auto-bank unit is sleeved on interior axle and can slides up and down along interior axle; The first toggle is connected between the outer shroud and fuselage of outer auto-bank unit, and the second toggle is connected between the interior ring and outer shaft of outer auto-bank unit; The 3rd toggle is connected between the outer shroud and outer shaft of interior auto-bank unit; The first connecting device comprises middle pull bar, lower link bar; The second connecting device comprises top rod, cross tube, long draw; The 3rd connecting device is long draw, and long draw top is provided with the auricle identical with cross tube quantity; Lower rotor distance-variable rocker arm is provided with auricle and lower auricle, and upper rotor distance-variable rocker arm is provided with auricle; The outer shroud of outer auto-bank unit is connected with lower link; The bottom of outer shaft propeller hub head is provided with the through hole identical with middle pull bar quantity, and middle pull bar is through through hole, and through-hole aperture is greater than middle pull bar bar footpath; The interior ring of outer auto-bank unit is connected with the lower end of middle pull bar, and middle pull bar upper end is connected with the lower auricle of lower rotor distance-variable rocker arm; The lower end of lower link bar is connected with the upper auricle of lower rotor distance-variable rocker arm, and the upper end of lower link bar is connected with the outer shroud of interior auto-bank unit; In interior auto-bank unit, be equipped with the auricle identical with sheer pole quantity, the outer end of sheer pole is connected with the auricle in interior auto-bank unit upper inner ring, the inner of sheer pole is connected with the lower end of top rod through the through hole arranging on interior axle, the upper end of top rod is connected with cross tube middle part, the inner of cross tube is connected with the auricle of long draw, and the outer end of cross tube is connected with the auricle of upper rotor distance-variable rocker arm; On long draw, be installed with position limit device and lower caging device, position limit device, lower caging device are positioned at axle inside.This optimal technical scheme makes mechanical layout of the present invention more rationally, more be convenient to handle, install, safeguard.
Preferably, be connected with the annulus that can dismantle at the second toggle, annulus is anchored on outer shaft.This optimal technical scheme can make the second toggle more firm with being connected of outer shaft, stressed more even.
Preferably, upper rotor hub, on the outside of rotor hub head install rotor fairing; Rotor fairing under installing in the outside of lower rotor hub, lower rotor hub head; Outer auto-bank unit is wrapped in fuselage fairing.This optimal technical scheme is conducive to realize the airflow design of helicopter overall appearance, reduces the useless resistance of complete machine.
Preferably, adapter ring can be dismantled, and adapter ring is provided with the auricle identical with sheer pole quantity, and sheer pole middle part is connected on the auricle of adapter ring.This optimal technical scheme is convenient to the installation and removal of adapter ring, and sheer pole can be moved around adapter ring neatly.
Preferably, interior outer shaft supporting seat comprises bearing seat, bearing, and outer shaft propeller hub head upper end forms a boss, interior outer shaft supporting seat is installed on the boss of outer shaft propeller hub head upper end, the inside of bearing seat is provided with bearing, and interior axle passes the inner ring of bearing, and closely cooperates with the inner ring of bearing.When this optimal technical scheme can make interior outer shaft High Rotation Speed, stability is higher.
Preferably, upper rotor hub, lower rotor hub all comprise propeller hub center piece, bearing, propeller hub housing and securing device, and bearing is installed on propeller hub enclosure interior; Propeller hub center piece outer end forms flange, is sticked in the bearing inner ring of outermost end bearing, for preventing that propeller hub center piece from inwardly sliding; Propeller hub center piece passes bearing inner ring and closely cooperates with bearing inner ring, and securing device is installed on the inner of propeller hub center piece, and bearing and securing device prevent that propeller hub center piece from outwards sliding jointly.This optimal technical scheme is conducive to realize the convenient control of rotor distance-variable rocker arm to rotor.
Preferably, the outer end of upper rotor distance-variable rocker arm, lower rotor distance-variable rocker arm all forms a quadrangular projection, quadrangular projection embeds the inner of propeller hub center piece, quadrangular projection center is provided with cylindrical hole, and screw is fastened on upper rotor hub center piece by upper rotor distance-variable rocker arm respectively, lower rotor distance-variable rocker arm is fastened on lower rotor hub center piece through cylindrical hole.
The present invention compared with prior art beneficial effect is:
(1) in the present invention, rotor control mechanism is positioned at rotor axle completely, lower rotor control mechanism part is positioned at rotor outer shaft, part is positioned at outside rotor shaft, fuselage fairing, make rotor control mechanism without exposing, and by propeller hub fairing is installed, eliminate the disturbance of traditional pitch-change-link to air-flow, and wind area is less, effectively reduce the useless resistance of rotor system in the time of flight, and make the variations in flow between rotor, lower rotor and rotor, fuselage more regular, improve helicopter performance.
(2) arrangement of mechanism of the present invention is reasonable, compact, and manoeuvrable has effectively reduced the shared space of coaxal helicopter steering unit, is convenient to realize the airflow design of helicopter overall appearance, reduces the useless resistance of complete machine.
(3) the present invention can realize being rigidly connected of upper and lower rotor and rotor shaft, and rotor is sensitiveer to control response.
Brief description of the drawings
Fig. 1 a is that the three-dimensional axle that waits of the present invention is surveyed view;
Fig. 1 b is three-dimensional portion cutaway view of the present invention;
Fig. 1 c is the three-dimensional cutaway view of the present invention;
Fig. 1 d is the partial enlarged drawing at A place in Fig. 1 c;
Fig. 1 e is the partial enlarged drawing at B place in Fig. 1 c;
Fig. 2 a is outer auto-bank unit and coupled parts graphics;
Fig. 2 b is outer auto-bank unit and coupled parts cutaway view;
Fig. 3 a is lower rotor hub and distance-variable rocker arm graphics;
Fig. 3 b is lower rotor hub and distance-variable rocker arm cutaway view;
Fig. 4 is lower rotor distance-variable rocker arm and cylinder lever connecting rod graphics;
Fig. 5 a is interior auto-bank unit and coupled parts graphics;
Fig. 5 b is interior auto-bank unit and coupled parts cutaway view;
Fig. 6 is adapter ring and sheer pole, top rod graphics;
Fig. 7 is upper rotor distance-variable rocker arm and long draw, cross bar, pull bar graphics;
Fig. 8 is outer shaft and interior axle graphics;
Fig. 9 a is interior outer shaft supporting seat graphics;
Fig. 9 b is interior outer shaft supporting seat cutaway view.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Fig. 1 a, Fig. 1 b, Fig. 1 c: the rotor blade up and down of coaxal helicopter is four.Corresponding steering unit comprises outer shaft 10, interior axle 3, interior outer shaft supporting seat 5, outer auto-bank unit 12, interior auto-bank unit 8, adapter ring 7, and three lower links 23, four middle pull bars 21, four lower link bars 19, four sheer poles 39, four top rods 17, four cross tubes 15, a long draw 24, position limit device 16, lower caging device, lower rotor hub 6, upper rotor hub 2, the upper rotary wing changing being connected with upper rotor hub the inner is apart from Rocker arm 4, the lower rotor distance-variable rocker arm 20 being connected with lower rotor hub the inner, the first toggle 22, the second toggle 11, the 3rd toggle 9.Wherein, lower link 23, middle pull bar 21, lower link bar 19, sheer pole 39, the two ends of top rod 17 are rod end bearing, the outer end of cross tube 15, the first toggle 22, the second toggle 11, the 3rd toggle 9 are rod end bearing with auto-bank unit coupling end, each pull bar, toggle are connected with each other by rod end bearing, or be connected with miscellaneous part, each pull bar, toggle can be rotated to either direction along rod end bearing.Outer shaft 10 and interior axle 3 are arranged on main speed reduction box, interior outer shaft supporting seat 5 is arranged on outer shaft 10 tops, outer auto-bank unit 12 is arranged on outer shaft 10, interior auto-bank unit 8 is arranged on interior axle 3, be positioned at outer shaft 10 propeller hub head inside, adapter ring 7 is arranged on interior axle 3, be positioned at above auto-bank unit 8, upper rotor hub 2 and lower rotor hub 6 are arranged on respectively on the propeller hub head of the interior axle 3 of rotor and outer shaft 10, upper rotor control parts are arranged on interior axle inside, upper rotor hub 2, upper rotor hub head and lower rotor hub 6, propeller hub fairing 13 is all equipped with in the outside of lower rotor hub head, 18, lower rotor hub fairing 18 do not affect its with outer shaft 10 rotation situation under with the transition of fuselage fairing stream line pattern, can effectively reduce flight resistance.
As shown in Fig. 2 a, Fig. 2 b: outer auto-bank unit 12 is made up of ball pivot 29, the collar 30, interior ring 31, bearing 33, outer shroud 34 and end ring 32,35.Ball pivot 29 is sleeved on outer shaft 10, and can slide up and down along outer shaft 10; Remaining part is with the synchronous up-and-down movement of ball pivot 29, and can be around ball pivot 29, tilt to either direction taking outer shaft axis as axis of symmetry.Outer shroud 34 is connected with lower link 23, and the first toggle 22 is connected between outer shroud 34 and fuselage, makes outer shroud 34 keep not turning.Second toggle 11 one end are connected on interior ring 31, and the other end is connected with an annulus, and annulus is made up of two semicircular ring splicings of detouchable, stitching portion is provided with auricle, by using bolted auricle, annulus is anchored on outer shaft, thereby makes interior ring 31 synchronize rotation with outer shaft 10.
As shown in Figure 3 a, 3 b: lower rotor hub 6 and upper rotor hub 2 quantity are four, and structure is identical, form by back-up ring, propeller hub housing 27 and securing device 28 between propeller hub center piece 25, some bearings 26 and bearing.Propeller hub center piece 25 outer ends are connected with rotor blade 1, and inner and lower rotor distance-variable rocker arm 20 is connected.Rotor hub housing 27 is arranged on propeller hub head, and propeller hub center piece 25 is arranged in propeller hub housing 27.Between bearing, back-up ring is between some bearings 26 and on the inner ring of gear at bearing, to reduce the usage quantity of bearing and can prevent bearing left and right play.Between the bearing 26 in propeller hub housing 27 and bearing, back-up ring and securing device 28 outwards jointly prevent propeller hub center piece 25 or inwardly slide, and propeller hub center piece 25 can freely rotate around displacement axis.The inner of propeller hub housing is protruded and is formed discoid propeller hub attachment face, is along the circumferential direction provided with some tapped bore, for being connected with propeller hub head on propeller hub attachment face.
As shown in Fig. 1 b, Fig. 1 c, Fig. 4,5a, Fig. 5 b: interior auto-bank unit 8 is identical with outer auto-bank unit 12 structures, formed by ball pivot 40, the collar 45, interior ring 41, bearing 44, outer shroud 43 and end ring 42,46.Ball pivot 40 is sleeved on interior axle 3 and can slides up and down along interior axle, remaining part with the synchronous up-and-down movement of ball pivot 40 also can be around ball pivot 40, tilt to either direction taking interior axle axis as axis of symmetry.Outer shroud 43 is connected with one end of toggle 9, and the other end of toggle 9 is connected with outer shaft 10 by bolt, to make outer shroud 43 keep synchronizeing rotation with outer shaft 10.Interior ring 41 is connected with the outer end of sheer pole 39.The lower end of middle pull bar 21 is connected with the interior ring 31 of outer auto-bank unit 12, the through hole that the upper end of middle pull bar 21 arranges through outer shaft propeller hub head bottom is connected with the lower auricle arranging on lower rotor distance-variable rocker arm 20, the lower end of lower link bar 19 is connected with the upper auricle arranging on lower rotor distance-variable rocker arm 20, and the upper end of lower link bar 19 is connected with the outer shroud 43 of interior auto-bank unit 8.Lower rotor distance-variable rocker arm 20 is fixedly connected with propeller hub center piece 25.The outer end of lower rotor distance-variable rocker arm 20 all forms a quadrangular projection, quadrangular projection embeds the inner of propeller hub center piece, quadrangular projection center is provided with cylindrical hole, and screw is fastened on lower rotor distance-variable rocker arm 20 on lower rotor hub center piece through cylindrical hole.Middle pull bar 21 up-and-down movements, can drive lower rotor distance-variable rocker arm 20 to rotate around displacement line of centers, realize the variation of blade 1 pitch.20 motions of lower rotor distance-variable rocker arm drive lower link bar 19 up-and-down movements, and the motion of lower link bar 19 drives again the motion of interior auto-bank unit outer shroud 43, and then drive whole interior auto-bank unit 8 to synchronize up-and-down movement or inclination with outer auto-bank unit 12.
As shown in Fig. 6, Fig. 8: adapter ring 7 is sleeved on interior axle 3, interior axle 3 is provided with four square through holes at suit place.Adapter ring is made up of two semicircular ring splicings of detouchable, and stitching portion is provided with auricle, can, by using bolted auricle, adapter ring 7 is anchored on interior axle 3.Sheer pole 39 middle parts are connected on the auricle of adapter ring 7, and the outer end of sheer pole 39 is connected with interior ring 41, and the inner square through hole passing on interior axle 3 is connected with the lower end of top rod 17.The motion of the interior ring 41 of interior auto-bank unit 8 drives sheer pole 39 to rotate around adapter ring 7 ring walls, and then drives top rod 17 up-and-down movements.
As shown in Figure 7: the middle part of cross tube 15 is connected with the upper end of top rod 17.The upper end of long draw arranges four pairs of auricles, and the inner of cross tube 15 is connected with the auricle that the upper end of long draw 24 arranges.The outer end of cross tube 15 is connected apart from Rocker arm 4 with upper rotary wing changing.Upper rotary wing changing is fixedly connected with upper rotor hub center piece apart from Rocker arm 4, and is connected with the outer end of cross tube 15.Upper rotary wing changing all forms a quadrangular projection apart from the outer end of Rocker arm 4, quadrangular projection embeds the inner of propeller hub center piece, quadrangular projection center is provided with cylindrical hole, and screw is fastened on upper rotor hub center piece through cylindrical hole by upper rotor distance-variable rocker arm.The up-and-down movement of top rod 17 drives upper rotary wing changing to rotate around displacement line of centers apart from Rocker arm 4, realizes the variation of blade pitch.Long draw 24 up-and-down movements can change the total distance of upper rotor, and then change the total apart from poor of upper and lower rotor, realize the course of helicopter and control.In addition, as shown in Figure 1 b, be installed with and be criss cross position limit device 16 and lower caging device on long draw 24, upper and lower spacing device is positioned at axle 3, for increasing the rigidity of long draw 24, prevents that long draw 24 from rocking.Wherein, position limit device 16 is positioned at rotary wing changing apart from Rocker arm 4 below, adapter ring 7 tops; Lower caging device is between interior auto-bank unit 8, outer auto-bank unit 12.Also can optionally increase some inhibiting device.
As shown in Figure 8: the propeller hub head of outer shaft 10 and interior axle 3 has respectively four propeller hub attachment faces, and in the middle of each propeller hub attachment face, be provided with through hole, be evenly arranged some tapped bore around cylindrical hole periphery, tapped bore on tapped bore and propeller hub attachment face on propeller hub head attachment face matches, for being connected of outer shaft propeller hub head and lower rotor hub 6, and being connected of interior axle propeller hub head and upper rotor hub 2.Outer shaft 10 and interior axle 3 be reverse constant speed rotation around axle center.
As shown in Figure 9: interior outer shaft supporting seat 5 is made up of bearing seat 36, bearing 37 and end ring 38.Bearing seat 36 is arranged on outer shaft 10, and bearing 37 is arranged in bearing seat 36 and with end ring 38 and fixes, and bearing 37 coordinates with interior axle 3.Bearing seat 36 rotates with outer shaft 10.Interior outer shaft supporting seat 5 ensures that outer shaft 10 and interior axle 3 do not bump when rotated.
While carrying out upper and lower rotor always apart from synchronous manipulation, move up and down all lower links 23 simultaneously, outer auto-bank unit 12 is slided up and down, middle pull bar 21 is thereupon synchronous shakes lower rotor distance-variable rocker arm 20, thereby changes the lower total distance of rotor; The shake of lower rotor distance-variable rocker arm 20 drives lower link bar 19 synchronously to move up and down, thereby interior auto-bank unit 8 is synchronously slided up and down; Sliding up and down of interior auto-bank unit 8, by sheer pole 39 transmissions, to top rod 17, top rod transmission is to cross tube 15, and final cross tube 15 transmissions give upper rotary wing changing apart from Rocker arm 4, thus the total distance of rotor on synchronous change.
While carrying out upper and lower rotor always apart from differential manipulation, move up and down all lower links 23 simultaneously, then move up and down the upper rotor rocking arm of long draw 24 shake, thus always distance and lower rotor pitch of rotor in differential change.
While carrying out cyclic pitch control, relative position by adjusting each lower link 23 is (as a lower link moves downward, two other lower link upward movement), outer auto-bank unit 12, interior auto-bank unit 8 are synchronously tilted in the same way, middle pull bar 21 is the lower rotor distance-variable rocker arm 20 of synchronous shake thereupon, thereby change lower feather, lower rotor distance-variable rocker arm 20 is by the transmission successively of lower link bar 19, sheer pole 39, top rod 17, cross tube 15, make rotary wing changing apart from the shake of Rocker arm 4 synchronous backward, thus feather on synchronous change.
Wherein, lower link 23 can be designed to more than three as required.For the manipulation of the coaxal helicopter of other quantity blades, correspondingly change upper rotary wing changing in the present embodiment quantity apart from Rocker arm 4, lower rotor distance-variable rocker arm 20 and middle pull bar 21, lower link bar 19, sheer pole 39, top rod 17, cross tube 15.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (8)
1. the rotor control mechanism for coaxal helicopter, it is characterized in that: comprise outer shaft (10), interior axle (3), interior outer shaft supporting seat (5), outer auto-bank unit (12), interior auto-bank unit (8), adapter ring (7), the 3rd connecting device, and some lower links (23), some the first connecting devices, some sheer poles (39), some the second connecting devices, some lower rotor hubs (6) that are installed on outer shaft propeller hub head, some upper rotor hubs (2) that are installed on interior axle propeller hub head, the upper rotor distance-variable rocker arm (4) that some and upper rotor hub (2) the inner is connected, the lower rotor distance-variable rocker arm (20) that some and lower rotor hub (6) the inner is connected,
The inner hollow of described interior axle (3), outer shaft (10), interior axle (3) is sleeved in outer shaft (10) by interior outer shaft supporting base (5), and described interior outer shaft supporting base (5) can ensure when described interior axle (3) and outer shaft (10) coaxially rotate backward not bump;
Described outer auto-bank unit (12) is positioned at the below of described outer shaft propeller hub head, and it is upper to be sleeved on described outer shaft (10), and described outer auto-bank unit (12) can tilt and can slide up and down along outer shaft to either direction; It is upper that described lower link (23) is connected to described outer auto-bank unit (12), and while making to move up and down lower link (23), described outer auto-bank unit (12) can run-off the straight or slided up and down;
Described interior auto-bank unit (8) is positioned at described outer shaft propeller hub head inside, and it is upper to be sleeved on described interior axle (3), and described interior auto-bank unit (8) can tilt and can slide up and down along interior axle (3) to either direction; Described outer auto-bank unit (12) is connected by described the first connecting device with interior auto-bank unit (8), makes outer auto-bank unit (12) and interior auto-bank unit (8) synchronously to tilt in the same way or synchronously to slide up and down;
Described the first connecting device is connected with described lower rotor distance-variable rocker arm (20) simultaneously, when making (12) run-off the straight of outer auto-bank unit or sliding up and down, described lower rotor distance-variable rocker arm (20) correspondingly shakes, and then changes lower rotor pitch;
Described adapter ring (7) is positioned at the top of described auto-bank unit (8), and is sleeved on described interior axle (3), joint at interior axle (3) with adapter ring (7), is provided with the through hole identical with described sheer pole (39) quantity on interior axle (3), through-hole aperture is greater than the bar footpath of described sheer pole (39), described the second connecting device is positioned at described axle (3) inside, described sheer pole (39) middle part is connected on described adapter ring (7), the outer end of described sheer pole (39) is connected with interior auto-bank unit (8), the inner of described sheer pole (39) is connected with the lower end of described the second connecting device through the upper through hole arranging of described interior axle (3), the upper end of described the second connecting device is connected with described upper rotor distance-variable rocker arm (4), by described the first connecting device, sheer pole (39), adapter ring (7), the cooperation of the second connecting device, can make outer auto-bank unit (12), when interior auto-bank unit (8) synchronously tilts or slides up and down, described upper rotor distance-variable rocker arm (4) and the shake of lower rotor distance-variable rocker arm (20) synchronous backward, and then on synchronous change, lower rotor pitch, described upper rotor distance-variable rocker arm (4) is connected with described the 3rd connecting device simultaneously, by moving up and down the 3rd connecting device, can change separately upper rotor pitch and lower rotor is not exerted an influence,
While carrying out synchronous manipulation of the total distance of upper and lower rotor, move up and down all lower links simultaneously, outer auto-bank unit (12), interior auto-bank unit (8) are synchronously slided up and down, the first connecting device is the lower rotor distance-variable rocker arm (20) of synchronously shake thereupon, thereby change the lower total distance of rotor, the second connecting device is the upper rotor distance-variable rocker arm (4) of synchronous backward shake thereupon, thus the total distance of rotor on synchronous change; While carrying out upper and lower rotor always apart from differential manipulation, move up and down all lower links simultaneously, then move up and down the upper rotor rocking arm (4) of the 3rd connecting device shake, thus always distance and lower rotor pitch of rotor in differential change; While carrying out cyclic pitch control, by adjusting the relative position of each lower link, outer auto-bank unit (12), interior auto-bank unit (8) are synchronously tilted in the same way, the first connecting device is the lower rotor distance-variable rocker arm (20) of synchronously shake thereupon, thereby change lower feather, the second connecting device is the upper rotor distance-variable rocker arm (4) of synchronous backward shake thereupon, thus feather on synchronous change.
2. the rotor control mechanism for coaxal helicopter according to claim 1, is characterized in that:
Described outer auto-bank unit (12), interior auto-bank unit (8) include ball pivot (29), interior ring (31), bearing (33), outer shroud (34); Described interior ring (31) is sleeved on ball pivot (29) above and can tilts to either direction around ball pivot (29), and interior ring (31), outer shroud (34) are connected by bearing (33); The ball pivot (29) of described outer auto-bank unit is sleeved on described outer shaft (10) above and can slides up and down along described outer shaft (10), and the ball pivot (40) of described interior auto-bank unit (8) is sleeved on described interior axle (3) above and can slides up and down along described interior axle (3); The first toggle (22) is connected between the outer shroud (34) and fuselage of described outer auto-bank unit (12), and the second toggle (11) is connected between the interior ring (31) and outer shaft (10) of described outer auto-bank unit (12); The 3rd toggle (9) is connected between the outer shroud (43) and described outer shaft (10) of described interior auto-bank unit (8);
Described the first connecting device comprises middle pull bar (21), lower link bar (19); Described the second connecting device comprises top rod (17), cross tube (15), long draw (24); Described the 3rd connecting device is long draw (24), and described long draw (24) top is provided with the auricle identical with cross tube (15) quantity; Described lower rotor distance-variable rocker arm (20) is provided with auricle and lower auricle, and described upper rotor distance-variable rocker arm (4) is provided with auricle;
The outer shroud (34) of described outer auto-bank unit (12) is connected with described lower link (23), the bottom of described outer shaft propeller hub head is provided with the through hole identical with described middle pull bar (21) quantity, and described middle pull bar (21) is through described through hole, and described through-hole aperture is greater than middle pull bar (21) bar footpath, the interior ring (31) of described outer auto-bank unit (12) is connected with the lower end of described middle pull bar (21), and described middle pull bar (21) upper end is connected with the lower auricle of described lower rotor distance-variable rocker arm (20), the lower end of described lower link bar (19) is connected with the upper auricle of described lower rotor distance-variable rocker arm (20), and the upper end of described lower link bar (19) is connected with the outer shroud (43) of described interior auto-bank unit (8), the interior ring (41) of described interior auto-bank unit (8) is provided with the auricle identical with described sheer pole (39) quantity, the outer end of described sheer pole (39) is connected with the auricle in described interior auto-bank unit (8) upper inner ring (41), the inner of described sheer pole (39) is connected with the lower end of described top rod (17) through the upper through hole arranging of described interior axle (3), the upper end of described top rod (17) is connected with described cross tube (15) middle part, the inner of described cross tube (15) is connected with the auricle of described long draw (24), the outer end of described cross tube (15) is connected with the auricle of described upper rotor distance-variable rocker arm (4),
On described long draw (24), be installed with position limit device (16) and lower caging device, described position limit device, lower caging device are positioned at axle (3) inside.
3. the rotor control mechanism for coaxal helicopter according to claim 2, is characterized in that: described the second toggle (11) is connected with the annulus that can dismantle, and described annulus is anchored on outer shaft (10).
4. the rotor control mechanism for coaxal helicopter according to claim 1, is characterized in that: rotor fairing is installed in the outside at upper rotor hub (2), upper rotor hub head; Rotor fairing under outside installation outside lower rotor hub (6), lower rotor hub head; Described outer auto-bank unit (12) is wrapped in fuselage fairing.
5. according to the arbitrary described rotor control mechanism for coaxal helicopter of claim 1～4, it is characterized in that: described adapter ring (7) can be dismantled, described adapter ring (7) is provided with the auricle identical with described sheer pole (39) quantity, and described sheer pole (39) middle part is connected on the auricle of described adapter ring (7).
6. according to the arbitrary described rotor control mechanism for coaxal helicopter of claim 1～4, it is characterized in that: described interior outer shaft supporting seat (3) comprises bearing seat (36), bearing (37), described outer shaft propeller hub head upper end forms a boss, described interior outer shaft supporting seat (5) is installed on the boss of described outer shaft propeller hub head upper end, the inside of described bearing seat is provided with described bearing (37), described interior axle (3) passes the inner ring of described bearing (37), and closely cooperates with the inner ring of bearing (37).
7. according to the arbitrary described rotor control mechanism for coaxal helicopter of claim 1～4, it is characterized in that: described upper rotor hub (2), lower rotor hub (6) all comprise propeller hub center piece (25), bearing (26), propeller hub housing (27) and securing device (28); Described bearing is installed on described propeller hub enclosure interior; Described propeller hub center piece outer end forms flange, is sticked in the bearing inner ring of outermost end bearing, for preventing that propeller hub center piece (25) from inwardly sliding; Described propeller hub center piece passes described bearing inner ring and closely cooperates with bearing inner ring, and described securing device is installed on the inner of described propeller hub center piece, and described bearing and described securing device prevent that propeller hub center piece (25) from outwards sliding jointly.
8. the rotor control mechanism for coaxal helicopter according to claim 7, it is characterized in that: the outer end of described upper rotor distance-variable rocker arm (4), lower rotor distance-variable rocker arm (20) all forms a quadrangular projection, described quadrangular projection embeds the inner of described propeller hub center piece (25), described quadrangular projection center is provided with cylindrical hole, and screw is fastened on upper rotor hub center piece by upper rotor distance-variable rocker arm (4) respectively, lower rotor distance-variable rocker arm (20) is fastened on lower rotor hub center piece through cylindrical hole.
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| CN201410353728.2A CN104129498B (en) | 2014-07-23 | 2014-07-23 | A kind of rotor control mechanism for coaxal helicopter |
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| CN201410353728.2A CN104129498B (en) | 2014-07-23 | 2014-07-23 | A kind of rotor control mechanism for coaxal helicopter |
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| CN104691752A (en) * | 2015-03-05 | 2015-06-10 | 葛讯 | Coaxial high-speed direct-driven helicopter and flight control mode thereof |
| CN105882955A (en) * | 2014-11-20 | 2016-08-24 | 北京万户空天科技有限公司 | Coaxial and equidirectional multi-rotor-wing helicopter |
| CN106697280A (en) * | 2017-01-24 | 2017-05-24 | 重庆通用航空产业集团有限公司 | Automatic helicopter inclinator |
| CN106741928A (en) * | 2015-11-24 | 2017-05-31 | 中国直升机设计研究所 | A kind of depopulated helicopter exempts from guide-roller type auto-bank unit |
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| CN110576969B (en) * | 2019-09-17 | 2022-04-19 | 燕山大学 | Coaxial forward and reverse rotor wing parallel driving device of helicopter |
| CN111268119A (en) * | 2020-02-17 | 2020-06-12 | 上海申嘉航空科技有限公司 | Helicopter rotor pitch rod, helicopter automatic tilter and helicopter |
| CN113772118A (en) * | 2021-09-03 | 2021-12-10 | 南京航空航天大学 | Method for operating rotor mechanism of coaxial rigid double-rotor test bed |
| CN113942640A (en) * | 2021-10-09 | 2022-01-18 | 中国直升机设计研究所 | Interior control rotor support piece structure |
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| CN114162338A (en) * | 2021-11-04 | 2022-03-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Coaxial contra-rotating propeller transmission system capable of independently changing pitch |
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