CN110562447B - Coaxial reverse dual-rotor transmission device - Google Patents
Coaxial reverse dual-rotor transmission device Download PDFInfo
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- CN110562447B CN110562447B CN201910879275.XA CN201910879275A CN110562447B CN 110562447 B CN110562447 B CN 110562447B CN 201910879275 A CN201910879275 A CN 201910879275A CN 110562447 B CN110562447 B CN 110562447B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/08—Helicopters with two or more rotors
- B64C27/10—Helicopters with two or more rotors arranged coaxially
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/12—Rotor drives
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Abstract
The invention discloses a coaxial reverse rotation dual-rotor transmission device which comprises an output unit and a plurality of input power shunting units, wherein the output unit comprises a first output shaft and a second output shaft, the first output shaft is sleeved on the second output shaft, the first output shaft is rotatably connected with the second output shaft through a supporting bearing, the bottom end of the first output shaft is fixedly connected with an outer gear ring, the bottom end of the second output shaft is fixedly connected with an inner gear ring, the diameter of the outer gear ring is smaller than that of the inner gear ring, the input power shunting units are arranged between the outer gear ring and the inner gear ring, and each input power shunting unit can realize power shunting and two-stage speed reduction. The coaxial reverse rotation dual-rotor transmission device has the advantages of large transmission ratio and high reliability.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to a coaxial reverse dual-rotor transmission device.
Background
A typical configuration for a coaxial twin-rotor helicopter main reducer drive system is "bevel gear reversing-parallel-planetary drive output". The input of the engine to the output of the main rotor wing generally consists of 3-5 stages of gear transmission, and in most cases, planetary transmission is used as the last stage, and two-stage planetary transmission or compound planetary transmission is adopted. For a multi-stage transmission system containing planetary gear transmission, the allowable range of the transmission ratio of the planetary gear transmission is limited by two aspects of structure and strength; meanwhile, the excessive transmission ratio lowers the transmission efficiency of the planetary reducer and is not beneficial to reducing the weight of the whole transmission system. Therefore, in order to meet the requirements of power-weight ratio, transmission efficiency and reliability of the helicopter transmission system and reduce the weight and the volume of the transmission system as much as possible, the transmission ratio of the planetary gear transmission in the active helicopter transmission system is relatively small, generally about 3-5.
For a coaxial dual-rotor transmission system, in order to meet the requirements of an upper rotor and a lower rotor which rotate around the same axis and have opposite directions, a transmission mode combining star-shaped gear transmission and a differential gear train is adopted. Although a power splitting mode is also adopted, the transmission is small due to the problems of structural strength, efficiency and the like of the planetary gear transmission; meanwhile, the planet wheel has revolution and rotation, so the structure is complex, the service working condition of the support bearing is complex, and the bearing is easy to damage.
Disclosure of Invention
The invention aims to provide a coaxial reverse rotation dual-rotor transmission device, which is used for solving the problems in the prior art and improving the transmission ratio and the reliability of a coaxial dual-rotor transmission system.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a coaxial reverse rotation dual-rotor transmission device which comprises an output unit and a plurality of input power shunting units, wherein the output unit comprises a first output shaft and a second output shaft, the first output shaft is sleeved on the second output shaft and is rotationally connected with the second output shaft through a supporting bearing, the bottom end of the first output shaft is fixedly connected with an outer gear ring, the bottom end of the second output shaft is fixedly connected with an inner gear ring, the diameter of the outer gear ring is smaller than that of the inner gear ring, and the input power shunting units are arranged between the outer gear ring and the inner gear ring;
each input power splitting unit comprises an input shaft, a first gear shaft, a second gear shaft, a third gear shaft, a fourth gear shaft and a fifth gear shaft, wherein a first bevel gear is fixedly arranged on the input shaft, a second bevel gear, a first gear and a second gear are fixedly arranged on the first gear shaft, a fourth gear and a sixth gear are fixedly arranged on the second gear shaft, a third gear and a fifth gear are fixedly arranged on the third gear shaft, a seventh gear and a ninth gear are fixedly arranged on the fourth gear shaft, an eighth gear and a tenth gear are fixedly arranged on the fifth gear shaft, the first bevel gear is meshed with the second bevel gear, the third gear and the fourth gear are respectively meshed with the first gear, the fifth gear and the sixth gear are respectively meshed with the outer gear ring, the seventh gear and the eighth gear are respectively meshed with the second gear, the ninth gear and the tenth gear are respectively engaged with the ring gear.
Preferably, the number of the input power splitting units is 1-3.
Preferably, the input shaft is horizontal, and the first output shaft, the second output shaft, the first gear shaft, the second gear shaft, the third gear shaft, the fourth gear shaft, and the fifth gear shaft are vertical.
Preferably, a gap is formed between the first output shaft and the second output shaft, the first output shaft is a ring column, and the top end of the second output shaft is higher than the top end of the first output shaft.
Preferably, the bottom end of the first gear shaft, the bottom end of the second gear shaft, the bottom end of the third gear shaft, the bottom end of the fourth gear shaft and the bottom end of the fifth gear shaft are respectively rotatably connected with a box body of the gear box through bearings.
Preferably, the first bevel gear and the second bevel gear are arc gears, the first gear, the second gear, the third gear, the fourth gear, the seventh gear and the eighth gear are spur gears, and the fifth gear, the sixth gear, the outer gear ring, the ninth gear, the tenth gear and the inner gear ring are herringbone gears or cylindrical gears.
Preferably, the input power splitting units are uniformly distributed, and a space is provided between two adjacent input power splitting units.
Preferably, the diameter of the second bevel gear is larger than that of the first bevel gear, the diameter of the third gear is equal to that of the fourth gear and larger than that of the first gear, the diameter of the fifth gear is equal to that of the sixth gear, the diameter of the seventh gear is equal to that of the eighth gear and larger than that of the second gear, and the diameter of the ninth gear is equal to that of the tenth gear.
Compared with the prior art, the coaxial reverse dual-rotor transmission device has the following technical effects:
the coaxial reverse rotation dual-rotor transmission device has the advantages of large transmission ratio and high reliability. According to the coaxial reverse rotation dual-rotor transmission device, two times of power splitting are realized at one time through the triple gear shaft, so that on one hand, the load of a branch transmission system is reduced, the gear structure limited by the bearing capacity is reduced, and the weight is reduced; on the other hand, the triple gear shaft is adopted to realize twice power splitting, the number of parts is reduced, the quality is reduced, the compactness of part distribution is improved, and the axial and radial sizes are reduced. Meanwhile, three-stage reduction transmission is multi-branch fixed shaft transmission, and the transmission ratio is large, so that the volume and the weight of the whole transmission system can be effectively reduced, and the reliability and the stability of the system are improved. In addition, the whole system is arranged in a layered mode in the axial direction, the inner gear ring and the outer gear ring are located on the lower layer, the power split stage is located on the middle layer, and the bevel gear is located on the upper layer, so that the design of the gear box and the fixation of a shaft system between layers are facilitated; because the same-stage twice power split transmission is adopted and the transmission system completely adopts a simple ordinary gear train, the technical realization is easy. The coaxial reverse rotation dual-rotor transmission device is suitable for being widely applied to the fields of medium and heavy helicopter transmission systems, ship transmission systems and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a first embodiment of a coaxial contra-rotating dual rotor transmission according to the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the coaxial contra-rotating dual rotor transmission of the present invention;
FIG. 3 is a first schematic structural view of a third embodiment of a coaxial contra-rotating dual-rotor transmission according to the present invention;
FIG. 4 is a second schematic structural view of a third embodiment of a coaxial contra-rotating dual-rotor transmission according to the present invention;
wherein: 1-input shaft, 2-first bevel gear, 3-first gear shaft, 4-second bevel gear, 5-first gear, 6-second gear, 7-third gear, 8-fourth gear, 9-fifth gear, 10-sixth gear, 11-external gear ring, 12-first output shaft, 13-seventh gear, 14-eighth gear, 15-ninth gear, 16-tenth gear, 17-internal gear ring, 18-second output shaft, 19-second gear shaft, 20-third gear shaft, 21-fourth gear shaft, 22-fifth gear shaft, 23-input power split unit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a coaxial reverse rotation dual-rotor transmission device, which is used for solving the problems in the prior art and improving the transmission ratio and the reliability of a coaxial dual-rotor transmission system.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1: the coaxial reverse rotation dual-rotor transmission device comprises an output unit and an input power splitting unit 23, wherein the output unit comprises a first output shaft 12 and a second output shaft 18, the first output shaft 12 is sleeved on the second output shaft 18, the first output shaft 12 is rotatably connected with the second output shaft 18 through a support bearing, a gap is formed between the first output shaft 12 and the second output shaft 18, the first output shaft 12 is a ring column, and the top end of the second output shaft 18 is higher than the top end of the first output shaft 12; the bottom end of the first output shaft 12 is fixedly connected with an outer gear ring 11, the bottom end of the second output shaft 18 is fixedly connected with an inner gear ring 17, the diameter of the outer gear ring 11 is smaller than that of the inner gear ring 17, and the input power splitting unit 23 is arranged between the outer gear ring 11 and the inner gear ring 17.
Each input power splitting unit 23 comprises an input shaft 1, a first gear shaft 3, a second gear shaft 19, a third gear shaft 20, a fourth gear shaft 21 and a fifth gear shaft 22, wherein a first bevel gear 2 is fixedly arranged on the input shaft 1, a second bevel gear 4, a first gear 5 and a second gear 6 are fixedly arranged on the first gear shaft 3, a fourth gear 8 and a sixth gear 10 are fixedly arranged on the second gear shaft 19, a third gear 7 and a fifth gear 9 are fixedly arranged on the third gear shaft 20, a seventh gear 13 and a ninth gear 15 are fixedly arranged on the fourth gear shaft 21, an eighth gear 14 and a tenth gear 16 are fixedly arranged on the fifth gear shaft 22, the first bevel gear 2 is meshed with the second bevel gear 4, the third gear 7 and the fourth gear 8 are respectively meshed with the first gear 5, the fifth gear 9 and the sixth gear 10 are respectively meshed with the outer gear ring 11, the seventh gear 13 and the eighth gear 14 are respectively meshed with the second gear 6, the ninth gear 15 and the tenth gear 16 are respectively engaged with the ring gear 17. The diameter of the second bevel gear 4 is larger than that of the first bevel gear 2, the diameters of the third gear 7 and the fourth gear 8 are equal and larger than that of the first gear 5, the diameters of the fifth gear 9 and the sixth gear 10 are equal, the diameters of the seventh gear 13 and the eighth gear 14 are equal and larger than that of the second gear 6, and the diameters of the ninth gear 15 and the tenth gear 16 are equal.
In the coaxial-reversing dual-rotor transmission device of the embodiment, the input shaft 1 is horizontal, and the first output shaft 12, the second output shaft 18, the first gear shaft 3, the second gear shaft 19, the third gear shaft 20, the fourth gear shaft 21 and the fifth gear shaft 22 are vertical; the bottom end of the first gear shaft 3, the bottom end of the second gear shaft 19, the bottom end of the third gear shaft 20, the bottom end of the fourth gear shaft 21 and the bottom end of the fifth gear shaft 22 are respectively and rotatably connected with the box body of the gear box through bearings. The first bevel gear 2 and the second bevel gear 4 are arc gears, the first gear 5, the second gear 6, the third gear 7, the fourth gear 8, the seventh gear 13 and the eighth gear 14 are straight gears, the fifth gear 9, the sixth gear 10, the outer gear ring 11, the ninth gear 15, the tenth gear 16 and the inner gear ring 17 are herringbone gears or cylindrical gears, and in the embodiment, herringbone gears are set.
When the coaxial contrarotation dual-rotor transmission works, the first bevel gear 2 is meshed with the second bevel gear 4 to realize the change of the transmission direction and the first-stage speed reduction; the second bevel gear 4, the first gear 5 and the second gear 6 are fixed on the first gear shaft 3, so the gear is called a triple shaft; the first gear 5 is simultaneously meshed with the third gear 7 and the fourth gear 8, which is called primary power splitting, and the second gear 6 is simultaneously meshed with the seventh gear 13 and the eighth gear 14, which is called secondary power splitting, so that power splitting and second-stage speed reduction of two times of same stage are realized; on the primary power splitting branch, a fifth gear 9 and a sixth gear 10 are respectively fixed on a double-coupling shaft together with a third gear 7 and a fourth gear 8, the double-coupling shaft is called a primary double-coupling shaft, and the fifth gear 9 and the sixth gear 10 are respectively meshed with an outer gear ring 11, so that power confluence is realized, the power confluence is output to a first output shaft 12, and third-stage speed reduction is realized; on the secondary power splitting branch, a ninth gear 15 and a tenth gear 16 are respectively fixed on a double coupling shaft together with a seventh gear 13 and an eighth gear 14, which are called secondary double coupling shafts, and the ninth gear 15 and the tenth gear 16 are respectively meshed with an inner gear ring 17, so that power confluence is realized, the power is output to a second output shaft 18, and third-stage speed reduction is realized; through the above power transmission, the coaxial rotation of the output shaft is finally realized, and the rotation direction is opposite.
Example two
As shown in fig. 2, the present embodiment provides a coaxial contra-rotating dual-rotor transmission device, and on the basis of the first embodiment, the coaxial contra-rotating dual-rotor transmission device of the present embodiment further has the following features:
the coaxial counter-rotating dual-rotor transmission device of the embodiment comprises two input power splitting units 23 which are uniformly distributed, and can realize coaxial counter-rotating dual-rotor transmission with two inputs.
EXAMPLE III
As shown in fig. 3 and 4, the present embodiment provides a coaxial contra-rotating dual-rotor transmission device, which has the following features on the basis of the first embodiment:
the coaxial reverse rotation dual-rotor transmission device of the embodiment comprises three input power splitting units 23 which are uniformly distributed, and can realize coaxial reverse rotation dual-rotor transmission with three inputs.
In the description of the present invention, it should be noted that the terms "top", "bottom", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A coaxial contrarotation dual-rotor transmission device is characterized in that: the power split device comprises an output unit and a plurality of input power split units, wherein the output unit comprises a first output shaft and a second output shaft, the first output shaft is sleeved on the second output shaft and is rotatably connected with the second output shaft through a supporting bearing, an outer gear ring is fixedly connected to the bottom end of the first output shaft, an inner gear ring is fixedly connected to the bottom end of the second output shaft, the diameter of the outer gear ring is smaller than that of the inner gear ring, and the input power split unit is arranged between the outer gear ring and the inner gear ring;
each input power splitting unit comprises an input shaft, a first gear shaft, a second gear shaft, a third gear shaft, a fourth gear shaft and a fifth gear shaft, wherein a first bevel gear is fixedly arranged on the input shaft, a second bevel gear, a first gear and a second gear are fixedly arranged on the first gear shaft, a fourth gear and a sixth gear are fixedly arranged on the second gear shaft, a third gear and a fifth gear are fixedly arranged on the third gear shaft, a seventh gear and a ninth gear are fixedly arranged on the fourth gear shaft, an eighth gear and a tenth gear are fixedly arranged on the fifth gear shaft, the first bevel gear is meshed with the second bevel gear, the third gear and the fourth gear are respectively meshed with the first gear, the fifth gear and the sixth gear are respectively meshed with the outer gear ring, the seventh gear and the eighth gear are respectively meshed with the second gear, the ninth gear and the tenth gear are respectively engaged with the ring gear.
2. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the number of the input power shunting units is 1-3.
3. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the input shaft is horizontal, and the first output shaft, the second output shaft, the first gear shaft, the second gear shaft, the third gear shaft, the fourth gear shaft and the fifth gear shaft are vertical.
4. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the first output shaft and the second output shaft are spaced, the first output shaft is a ring column, and the top end of the second output shaft is higher than that of the first output shaft.
5. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the bottom end of the first gear shaft, the bottom end of the second gear shaft, the bottom end of the third gear shaft, the bottom end of the fourth gear shaft and the bottom end of the fifth gear shaft are respectively and rotatably connected with a box body of the gear box through bearings.
6. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the first bevel gear and the second bevel gear are arc gears, the first gear, the second gear, the third gear, the fourth gear, the seventh gear and the eighth gear are straight gears, and the fifth gear, the sixth gear, the outer gear ring, the ninth gear, the tenth gear and the inner gear ring are herringbone gears.
7. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the input power shunting units are uniformly distributed, and an interval is arranged between every two adjacent input power shunting units.
8. The co-axial counter-rotating dual-rotor transmission of claim 1, wherein: the diameter of the second bevel gear is larger than that of the first bevel gear, the diameter of the third gear is equal to that of the fourth gear and larger than that of the first gear, the diameter of the fifth gear is equal to that of the sixth gear, the diameter of the seventh gear is equal to that of the eighth gear and larger than that of the second gear, and the diameter of the ninth gear is equal to that of the tenth gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910879275.XA CN110562447B (en) | 2019-09-18 | 2019-09-18 | Coaxial reverse dual-rotor transmission device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879275.XA CN110562447B (en) | 2019-09-18 | 2019-09-18 | Coaxial reverse dual-rotor transmission device |
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| CN110562447A CN110562447A (en) | 2019-12-13 |
| CN110562447B true CN110562447B (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU214644U1 (en) * | 2022-09-12 | 2022-11-08 | Сергей Александрович Мосиенко | UNMANNED HELICOPTER TRANSMISSION |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268114B (en) * | 2020-02-27 | 2024-03-01 | 西安工业大学 | Bevel gear coaxial counter-rotating double-rotor transmission mechanism |
| CN111268115B (en) * | 2020-02-27 | 2024-02-27 | 西安工业大学 | Face gear configuration coaxial double-rotor speed-changing transmission mechanism |
| CN112078786B (en) * | 2020-10-10 | 2024-07-23 | 珠海市双捷科技有限公司 | Dual rotor system and coaxial helicopter |
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| CN110562447A (en) | 2019-12-13 |
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