CN108945426B - Automatic inclinator suitable for various propeller hub configurations - Google Patents
Automatic inclinator suitable for various propeller hub configurations Download PDFInfo
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- CN108945426B CN108945426B CN201810677403.8A CN201810677403A CN108945426B CN 108945426 B CN108945426 B CN 108945426B CN 201810677403 A CN201810677403 A CN 201810677403A CN 108945426 B CN108945426 B CN 108945426B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
- B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
- B64C27/59—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical
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Abstract
The invention provides an automatic inclinator suitable for various propeller hub configurations, which comprises a fixed ring assembly, a movable ring assembly, a spherical hinge assembly, a variable-pitch pull rod assembly, a torque arm assembly and a guide barrel, wherein a rotor shaft is rotatably arranged in the guide barrel, the fixed ring assembly is sleeved outside the guide barrel and is connected with the guide barrel through the spherical hinge assembly, the fixed ring assembly extends to form an annular step along the axial direction of the guide barrel, the movable ring assembly is rotatably sleeved outside the step, the movable ring assembly is circumferentially provided with a plurality of fork lugs, one end of the torque arm assembly is selectively connected with the fork lugs, the other end of the torque arm assembly is connected with a propeller hub, one end of the variable-pitch pull rod assembly is selectively connected with the fork lugs, and the other end of the variable-pitch pull rod assembly is connected with a support arm of the propeller hub. The automatic inclinator of the ring form of ear-moving of many forks structure design ingenious, only need to change the mounting position of variable pitch tie rod and torsion arm antitorque arm and just can satisfy the propeller hub configuration that the multi-angle was arranged.
Description
Technical Field
The invention belongs to the technical field of rotor systems, and particularly relates to an automatic tilter suitable for various hub configurations.
Background
The automatic inclinator of the helicopter is a key component of a helicopter rotor system and a control system, and comprises a fixed ring component, a movable ring component, a large spherical hinge component, a variable-pitch pull rod component, a torsion arm anti-torsion arm component and the like. The automatic inclinator mainly realizes the total pitch control of the rotor wing by fixing a guide cylinder at the upper end of the main reducer to slide up and down, and realizes the periodic pitch control of the rotor wing by tilting around the spherical hinge assembly. The operation of the rotor wing (including total distance and periodic variable distance operation) from the steering engine is transmitted to the movable ring through the fixed ring and the large bearing, then transmitted to the variable distance pull rod and finally transmitted to the main hub support arm, so that the operation of the rotor wing is realized. The conventional automatic tillers and the hubs are in one-to-one correspondence, namely, when the configuration of the hubs is changed, the automatic tillers need to be redesigned to meet the new hubs, and a large amount of workload is brought to design and manufacture.
Disclosure of Invention
In order to solve the above problems, the present invention provides an automatic tilter suitable for various propeller hub configurations, comprising a fixed ring assembly, a movable ring assembly, a spherical hinge assembly, a variable-pitch pull rod assembly, a torque arm assembly and a guide barrel, wherein a rotor shaft is rotatably arranged in the guide barrel, a first propeller hub and a second propeller hub are fixedly arranged at one end extending out of the guide barrel, the fixed ring assembly is sleeved outside the guide barrel and connected with the guide barrel through the spherical hinge assembly, the fixed ring assembly extends in the axial direction of the guide barrel to form an annular step, the movable ring assembly is sleeved outside the step and connected with the fixed ring assembly through a four-contact bearing, the movable ring assembly is circumferentially provided with a plurality of fork lugs, one end of the torque arm assembly is selectively connected with the fork lugs, the other end of the torque arm assembly is connected with the first propeller hub, and one end of the variable-pitch pull rod assembly is selectively connected with the fork lugs, the other end is connected to the arm of the first hub or the second hub.
Preferably, the guide cylinder further comprises a flat key, a first groove is axially arranged on the outer wall of the guide cylinder, a second groove corresponding to the first groove is arranged on the spherical hinge assembly, and the flat key can be adaptively accommodated in a space defined by the first groove and the second groove.
Preferably, the guide cylinder outer wall is provided with a strip-shaped bulge along the axial direction, the spherical hinge assembly is provided with a groove corresponding to the strip-shaped bulge, and the strip-shaped bulge can be accommodated in the groove in an adaptive manner.
Preferably, the fork ears comprise 8-12 fork ears which are uniformly distributed on the circumferential direction of the movable ring assembly.
Preferably, the number of the fork ears is 10.
Preferably, the torque arm assembly includes first and second arms hingedly connected to each other, the first arm being hingedly connected to the yoke and the second arm being hingedly connected to the first hub.
Preferably, the torsion arm assembly comprises two pieces of torsion arm which are respectively connected to the fork lugs at symmetrical positions of the rotating ring assembly.
The multi-fork ear-moving ring type automatic inclinator is ingenious in structural design, and the hub configurations of 30 degrees, 45 degrees, 60 degrees and 90 degrees can be met only by changing the installation positions of the variable pitch pull rod and the torsion arm torsion preventing arm.
When model design or pre-research is carried out, in order to select a proper hub configuration, a comparison test of the configurations of hubs with various configurations is required, the multi-fork ear-moving ring type automatic inclinator can meet the requirements of the hubs with various configuration parameters, the number of designed and manufactured automatic inclinators is reduced, and the manufacturing cost is saved; when the configurations of different hubs are exchanged, the automatic inclinator in the multi-fork ear-moving ring form only needs to change the installation positions of the variable-pitch pull rod assembly and the torsion arm assembly without changing the automatic inclinator, so that the changing time and the labor intensity of workers are reduced; the conventional automatic inclinator contains an anti-torsion arm assembly, the novel automatic inclinator is not provided with the anti-torsion arm assembly, the fixed ring is prevented from rotating by designing a flat key and a rotating shaft, so that the function of the anti-torsion arm is realized, and the design method reduces the number of the parts of the whole automatic inclinator and reduces the manufacturing and processing cost.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of an automatic tilter according to the present invention suitable for use with a variety of hub configurations.
Fig. 2 is a schematic structural diagram of the rotating ring assembly shown in fig. 1 according to the embodiment of the present invention.
Figure 3 is a view of the hub mounting with the arms at 30 of the embodiment of figure 1 of the present invention.
FIG. 4 is a view of the hub mounting with the arms at 45 of the embodiment of FIG. 1 of the present invention.
Detailed Description
The invention is further explained below by means of specific examples.
To overcome the disadvantage that the conventional automatic tilter can only meet one hub configuration, a novel automatic tilter in the form of a multi-fork ear-moving ring is invented, and the novel automatic tilter can adapt to various hub configurations.
Referring to fig. 1, the automatic recliner mainly comprises a fixed ring assembly 1, a movable ring assembly 2, a large spherical hinge assembly 3, a variable-pitch pull rod assembly 4, a torsion arm assembly 5, a flat key 6 functioning as an anti-torsion arm, and a guide sleeve 7. The rotating ring assembly is a key component of the present invention. The movable ring assembly 2 has 8-12 fork lugs 21, as shown in fig. 2, the number of the fork lugs of the movable ring is determined according to actual conditions, and different fork lugs are combined with each other to obtain fork lug combinations arranged at various angles (30 degrees, 45 degrees, 60 degrees and 90 degrees).
Taking a 10-fork ear-ring automatic tilter as an example, it is given how the automatic tilter realizes a scissors hub arranged at 30 °, 45 ° and 60 °: assuming that the automatic tilter rotates counterclockwise in the viewing direction, the first fork lug rotates clockwise from the positive direction of the x-axis in fig. 2 to the tenth fork lug (not shown in the figure), wherein the first fork lug rotates rightwards along the x-axis, the fourth fork lug moves upwards along the y-axis, the sixth fork lug moves leftwards along the x-axis, and the ninth fork lug moves downwards along the y-axis, so that it can be understood that the first fork lug to the fourth fork lug are spaced at 30 degrees, the fourth fork lug to the sixth fork lug are spaced at 45 degrees, the sixth fork lug to the ninth fork lug are spaced at 30 degrees, the ninth fork lug to the first fork lug are spaced at 45 degrees, and the hubs can be combined into various arrangements based on the spacing degrees between the fork lugs.
As shown in fig. 3, the scissors hubs with arms arranged at 30 °: the first fork ear and the fifth fork ear are connected with a torque arm assembly, the third fork ear, the fourth fork ear, the eighth fork ear and the ninth fork ear are provided with a variable-pitch pull rod assembly, the other ends of the variable-pitch pull rods at the fourth fork ear and the ninth fork ear are connected with a low-position hub support arm, the third fork ear is connected with the variable-pitch pull rod at the eighth fork ear is connected with a high-position hub support arm, 8 in the figure 3 is a high-position hub, namely a first hub, and 9 is a low-position hub, namely a second hub.
Scissors hub with arms arranged at 60 °: the installation is similar to the paddle hub of the scissors arranged at 30 degrees, the first fork lug and the fifth fork lug are connected with the torque arm assembly, the second fork lug, the fourth fork lug, the seventh fork lug and the ninth fork lug are selected to be connected with the variable-pitch pull rod assembly, and the other ends of the variable-pitch pull rods at the fourth fork lug and the ninth fork lug are connected with the low-position paddle hub supporting arm.
As shown in fig. 4, the scissors hubs with arms arranged at 45 °: because aerodynamic influence, low-order propeller hub support arm must advance, and the installation position of torsion arm need be changed when this propeller hub arranges, and the installation scheme is: the four fork ears and the nine fork ears are provided with a torque arm assembly, the first fork ear, the fifth fork ear, the sixth fork ear and the tenth fork ear are provided with variable-pitch pull rods, and the other ends of the variable-pitch pull rods at the four fork ears and the nine fork ears are connected with a low-position hub supporting arm.
The invention has the advantages that when the height of the high-low position propeller hub support arm is changed, the length of the variable-pitch pull rod can be changed; a hub with arms arranged at 90 may be suitable.
The multi-fork ear-moving ring type automatic inclinator is ingenious in structural design, and the hub configurations of 30 degrees, 45 degrees, 60 degrees and 90 degrees can be met only by changing the installation positions of the variable pitch pull rod and the torsion arm torsion preventing arm.
Claims (6)
1. The automatic inclinator is characterized by comprising a fixed ring component (1), a movable ring component (2), a spherical hinge component (3), a variable-pitch pull rod component (4), a torque arm component (5) and a guide barrel (7), wherein a rotor shaft is rotatably arranged in the guide barrel, a first propeller hub and a second propeller hub are fixedly arranged at one end extending out of the guide barrel (7), the fixed ring component (1) is sleeved outside the guide barrel and is connected with the guide barrel (7) through the spherical hinge component (3), the fixed ring component (1) extends along the axial direction of the guide barrel to form an annular step, the movable ring component (2) is sleeved outside the step and is connected with the fixed ring component (1) through a four-contact bearing, the movable ring component (2) is circumferentially provided with a plurality of fork lugs, and one end of the torque arm component (5) is selectively connected with the fork lugs, the other end of the variable-pitch pull rod assembly (4) is connected with the first hub, one end of the variable-pitch pull rod assembly is selectively connected with the fork lug, and the other end of the variable-pitch pull rod assembly is connected to a support arm of the first hub or the second hub;
the number of the fork ears is 8-12, and the hubs are combined into a plurality of arrangement modes by arranging the fork ears at intervals of 30 degrees, 45 degrees, 60 degrees or 90 degrees and changing the installation positions of the variable pitch pull rod and the torsion arm torsion preventing arm.
2. The automatic recliner for multiple hub configurations as claimed in claim 1 further comprising a flat key (6), wherein a first groove is axially disposed on an outer wall of the guide sleeve (7), and a second groove corresponding to the first groove is disposed on the ball joint assembly (3), wherein the flat key is adapted to be received in a space defined by the first groove and the second groove.
3. The automatic inclinator suitable for various hub configurations of claim 1, characterized in that the guide tube (7) is provided with a strip-shaped protrusion along the axial direction on the outer wall, the spherical hinge assembly (3) is provided with a groove corresponding to the strip-shaped protrusion, and the strip-shaped protrusion can be accommodated in the groove.
4. The automatic recliner of claim 1 wherein the number of fork ears is 10.
5. Automatic tilter adapted for multiple hub configurations, according to claim 1, characterized in that said torque arm assembly (5) comprises a first arm and a second arm hinged to each other, said first arm being hinged on said fork ear and said second arm being hinged on said first hub.
6. Automatic tilter adapted for multiple hub configurations as claimed in claim 1, wherein said torque arm assembly (5) comprises two, respectively connected to fork ears at symmetrical positions of the rotating ring assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810677403.8A CN108945426B (en) | 2018-06-27 | 2018-06-27 | Automatic inclinator suitable for various propeller hub configurations |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810677403.8A CN108945426B (en) | 2018-06-27 | 2018-06-27 | Automatic inclinator suitable for various propeller hub configurations |
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| CN108945426A CN108945426A (en) | 2018-12-07 |
| CN108945426B true CN108945426B (en) | 2021-12-03 |
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| CN201810677403.8A Active CN108945426B (en) | 2018-06-27 | 2018-06-27 | Automatic inclinator suitable for various propeller hub configurations |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525645B (en) * | 2019-08-30 | 2023-12-22 | 南京航天国器智能装备有限公司 | Unmanned aerial vehicle torque arm rotor mechanism |
| CN110697038A (en) * | 2019-11-07 | 2020-01-17 | 南京国器智能装备有限公司 | Variable-pitch control mechanism of unmanned helicopter |
| CN111392031B (en) * | 2020-02-24 | 2022-05-06 | 深圳联合飞机科技有限公司 | Rotor wing pitch changing device |
| CN112173099A (en) * | 2020-11-26 | 2021-01-05 | 尚良仲毅(沈阳)高新科技有限公司 | Pitch changing device for unmanned aerial vehicle, pitch changing control method and unmanned aerial vehicle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8979495B2 (en) * | 2009-12-21 | 2015-03-17 | Sikorsky Aircraft Corporation | Control system and method for rotor assembly |
| ITRM20110563A1 (en) * | 2011-10-27 | 2013-04-28 | K4A S R L | "HOMOCINETIC CARDANIC JOINT FOR HELICOPTER ROTORS" |
| US10005549B2 (en) * | 2014-06-26 | 2018-06-26 | Rs Helikopter Gmbh | Coaxial lifting system |
| CN104908976A (en) * | 2015-05-19 | 2015-09-16 | 北京航空航天大学 | Simple rotor mechanism of coaxial dual-rotor helicopter test stand |
| CN106741920B (en) * | 2015-11-24 | 2019-05-07 | 中国直升机设计研究所 | A kind of interior auto-bank unit manipulated of axis |
| CN206031773U (en) * | 2016-08-23 | 2017-03-22 | 湖南省库塔科技有限公司 | Helicopter and rotor device thereof |
| CN206417198U (en) * | 2017-01-13 | 2017-08-18 | 重庆星环航空科技有限公司 | Rotor head and pitch driven torus phase localizer mounting bracket integral structure |
| CN107651183A (en) * | 2017-05-02 | 2018-02-02 | 北京深远世宁科技有限公司 | Unmanned plane drive shaft, unmanned machine actuating device and unmanned plane |
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