CN112357076B - Coaxial dual-rotor helicopter transmission device with cylindrical gear shunt - Google Patents
Coaxial dual-rotor helicopter transmission device with cylindrical gear shunt Download PDFInfo
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- CN112357076B CN112357076B CN202010855877.4A CN202010855877A CN112357076B CN 112357076 B CN112357076 B CN 112357076B CN 202010855877 A CN202010855877 A CN 202010855877A CN 112357076 B CN112357076 B CN 112357076B
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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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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
- F16H37/065—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with a plurality of driving or driven shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02091—Measures for reducing weight of gearbox
Abstract
A cylindrical gear shunt coaxial dual-rotor helicopter transmission device. Relates to the field of coaxial dual-rotor helicopter transmission system configurations. The coaxial dual-rotor helicopter transmission device with the cylindrical gear shunt has the advantages of small size, compact structure, reasonable spatial layout and the like while solving the problems of unbalanced load, small transmission ratio of the last stage and the like in the power transmission process. The bevel gear power converging transmission unit, the cylindrical gear power splitting transmission unit, the cylindrical gear power converging transmission unit and the output unit are included; the converging-diverging gear shaft and the inner rotor shaft and the outer rotor shaft in the output unit are coaxial. The invention has high maturity of the whole technology, simple structure and high reliability, lightens the weight and the volume of the transmission system and meets the requirement of large power-weight ratio.
Description
Technical Field
The invention relates to the field of coaxial dual-rotor helicopter transmission system configurations, in particular to a cylindrical gear shunt coaxial dual-rotor helicopter transmission device, which is a coaxial reverse dual-rotor helicopter transmission system configuration with bevel gear power confluence and capable of completing power shunt deceleration through a cylindrical gear and realizing coaxial reverse rotation.
Background
The traditional single-rotor helicopter mostly adopts the layout of a single rotor with a tail rotor, has more configurations, only uses the tail rotor to balance the torque generated by the rotor, does not generate forward thrust, and cannot meet the increasing speed requirement of the helicopter. Compared with a single-rotor helicopter, the coaxial dual-rotor helicopter has the advantages that the upper rotor and the lower rotor rotate in the same speed and the opposite direction, the torque can be automatically offset, the balance is achieved, the rotating speed is accurately controlled, and the transmission system is more complex.
At present, the coaxial dual-rotor helicopter transmission system is mainly in a Sikorsky dual-rotor coaxial configuration and a closed differential gear train coaxial configuration designed by the Russian Schaft design office. The Sikorsky twin-rotor coaxial configuration is mostly shown as a Chinese invention patent with the application number of 201910879275.X named as a coaxial reverse twin-rotor transmission device published by the State administration in 12, 13 and 2019, and is characterized in that the last stage is a cylindrical gear transmission mechanism capable of realizing a large transmission ratio, but in the power transmission process of the configuration, a plurality of first gear shafts are positioned on one side of the axial center of the coaxial rotors, so that the problem of unbalanced load usually exists in the power transmission process, and a main speed reducer is large in size and unreasonable in structural arrangement. Most of the closed differential gear train coaxial configurations designed by Russian Schaft Burkh are shown in the Chinese patent invention entitled "a coaxial twin-rotor helicopter main reducer and a helicopter" published by the State administration at 6/19/2020 and having application number "202010194138.5", and the last stage of such configurations generally adopts a closed differential gear train, and the configurations are widely applied to the served twin-rotor helicopters such as Ka-28 and Ka-50. However, the transmission of the planetary gear is limited by the problems of structural strength, transmission efficiency and the like, and the transmission is small; meanwhile, the planet wheel has revolution and rotation, the structure is complex compared with a fixed-axis wheel train, the service working condition of the supporting bearing is complex, the bearing is easy to damage, and the problems of difficulty in matching teeth, high manufacturing and mounting precision and the like exist at the same time. Therefore, it is desirable to conceive of a coaxial twin-rotor configuration that is simple in construction and capable of delivering relatively high power.
Disclosure of Invention
Aiming at the problems, the invention provides the coaxial dual-rotor helicopter transmission device with the cylindrical gear shunt, which can have the advantages of small volume, compact structure, reasonable spatial layout and the like while solving the problems of unbalanced load, small transmission ratio of the last stage and the like in the power transmission process. The transmission of each stage adopts ordinary gear train transmission, so that the technical maturity is high, the structure is simple, and the reliability is high; the third stage adopts power split transmission, and the transmission ratio of the last stage is larger, so that the weight and the volume of a transmission system are reduced, and the requirement of large power-weight ratio is met.
The technical scheme of the invention is as follows: the bevel gear power converging transmission unit, the cylindrical gear power splitting transmission unit, the cylindrical gear power converging transmission unit and the output unit are included;
the bevel gear power converging transmission unit comprises a first-stage reversing bevel gear pair and a second-stage power converging bevel gear pair;
the first stage reversing bevel gear pair is provided with at least two driving bevel gears which are connected with the engine; the second-stage power converging bevel gear pair is provided with at least two driving bevel gears and one driven bevel gear, the driving bevel gears in the second-stage power converging bevel gear pair correspond to the driven bevel gears in the first-stage reversing bevel gear pair one by one and are positioned on the same wheel shaft, and all the driving bevel gears in the second-stage power converging bevel gear pair are meshed with the driven bevel gears simultaneously;
the cylindrical gear power splitting transmission unit comprises a third-stage power splitting cylindrical gear pair;
the third-stage power splitting cylindrical gear pair is internally provided with a driving gear and at least three driven gears, the driving gear in the third-stage power splitting cylindrical gear pair and the driven bevel gear in the second-stage power converging bevel gear pair are positioned on the same wheel shaft, and all the driven gears in the third-stage power splitting cylindrical gear pair are simultaneously meshed with the driving gear;
the cylindrical gear power converging transmission unit comprises a fourth-stage internal meshing power converging cylindrical gear pair and a fourth-stage external meshing power converging cylindrical gear pair;
the fourth-stage internal meshing power converging cylindrical gear pair is provided with at least three driving gears and an internal gear 21, the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair correspond to the driven gears in the third-stage power splitting cylindrical gear pair one by one and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair are meshed with the internal gear 21 at the same time;
the fourth-stage external meshing power converging cylindrical gear pair is provided with at least three driving gears and an external gear 22, the driving gears in the fourth-stage external meshing power converging cylindrical gear pair and the driven gears in the third-stage power splitting cylindrical gear pair are in one-to-one correspondence and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage external meshing power converging cylindrical gear pair are meshed with the external gear 22 at the same time;
the output unit comprises an outer rotor shaft 24 fixedly connected with the inner gear 21 and an inner rotor shaft 25 fixedly connected with the outer gear 22, and the four parts of the inner gear 21, the outer gear 22, the outer rotor shaft 24 and the inner rotor shaft 25 have the same axle center;
a driven bevel gear in the second-stage power converging bevel gear pair, a driving gear in the third-stage power splitting cylindrical gear pair and wheel shafts at the same position of the driven bevel gear and the driving gear form a converging-diverging gear shaft; the converging-diverging gear shaft and the inner rotor shaft 25 and the outer rotor shaft 24 in the output unit are coaxial.
The drive bevel gear in the second-stage power converging bevel gear pair, the driven bevel gear in the first-stage reversing bevel gear pair and wheel shafts at the same position of the drive bevel gear and the driven bevel gear form a duplicate gear shaft together, and all the duplicate gear shafts are uniformly arranged along the circumferential direction of the converging-diverging gear shafts.
The driving gear in the fourth-stage internal meshing power converging cylindrical gear pair, the driving gear in the fourth-stage external meshing power converging cylindrical gear pair, the driven gear in the third-stage power splitting cylindrical gear pair and wheel shafts at the same positions of the driving gear, the driving gear and the driven gear form a triple gear shaft together, and all the triple gear shafts are uniformly arranged along the circumferential direction of the converging and splitting gear shafts and are located in an area between the internal gear and the external gear.
The inner gear 21 is fixedly connected to an outer rotor shaft 24 via a conical barrel 23, and the outer gear 22 is located within the conical barrel 23 and is fixedly connected to an inner rotor shaft 25.
The first stage reversing bevel gear pair and the second stage power converging bevel gear pair are both spiral bevel gears, the third stage power splitting cylindrical gear pair is a straight-tooth cylindrical gear, the fourth stage internal meshing power converging cylindrical gear pair is a herringbone gear or a straight-tooth cylindrical gear, and the fourth stage external meshing power converging cylindrical gear pair is a herringbone gear or a straight-tooth cylindrical gear.
The transmission ratios of the first-stage reversing bevel gear pair, the second-stage power converging bevel gear pair, the third-stage power splitting cylindrical gear pair, the fourth-stage internal meshing power converging cylindrical gear pair and the fourth-stage external meshing power converging cylindrical gear pair are all larger than 1.
The transmission ratio of the fourth-stage internal meshing power converging cylindrical gear pair is the same as that of the fourth-stage external meshing power converging cylindrical gear pair.
The invention has the beneficial effects that:
the transmission system of the invention adopts fixed-axis gear train transmission, and is easy to realize technically, the first stage of the invention is bevel gear transmission, the change of the transmission direction is realized, the arrangement mode of an engine is well considered, the second stage power converging bevel gear pair is combined by bevel gears, the space utilization rate is improved, meanwhile, the main reducer device is longitudinally arranged, the external outline is more regular, the design of a modular structure is facilitated, the internal space of the main reducer box body is well utilized, and the volume and the mass of the main reducer box body are reduced. The transmission system configuration of the invention can be widely applied to the fields of medium and heavy helicopter transmission systems, ship transmission systems and the like
The third stage of the invention adopts cylindrical gear power split transmission, and because the driving gear is a central gear, a plurality of driven gears can be uniformly distributed, the load of each branch of the transmission system is effectively reduced, and meanwhile, the transmission of each branch has certain symmetry and is not easy to carry eccentrically, and the complexity of the structural design of the gear system is effectively reduced.
The invention realizes shunt transmission at the fourth stage, realizes internal engagement and external engagement through the triple gear respectively, thereby driving the inner rotor shaft and the outer rotor shaft to coaxially and reversely rotate, has simple structure, reduces the number of parts, effectively reduces the volume and the quality of a gear system, and improves the stability and the reliability of the system through uniform layout.
The size of the inner gear is not limited by the space requirement of the engine, so that the overall size of the transmission device can be reduced to a great extent, and the spatial layout of the transmission device is more reasonable and more convenient.
The invention integrally solves the problems of unbalanced load, smaller transmission ratio of the last stage and the like in the power transmission process, has the advantages of small volume, compact structure, reasonable spatial layout and the like, has high technical maturity, simple structure and high reliability, reduces the weight and the volume of a transmission system, and meets the requirement of large power-to-weight ratio.
Drawings
Figure 1 is a transmission diagram of the scheme,
figure 2 is a schematic structural diagram of the present invention,
FIG. 3 is a second structural schematic diagram of the present disclosure;
in the drawing, 1 is a first bevel gear, 2 is a second bevel gear, 3 is a third bevel gear, 4 is a fourth bevel gear, 5 is a fifth bevel gear, 6 is a sixth bevel gear, 7 is a seventh bevel gear, 8 is an eighth bevel gear, 9 is a ninth bevel gear, 10 is a tenth bevel gear, 11 is a first cylindrical gear, 12 is a second cylindrical gear, 13 is a third cylindrical gear, 14 is a fourth cylindrical gear, 15 is a fifth cylindrical gear, 16 is a sixth cylindrical gear, 17 is a seventh cylindrical gear, 18 is an eighth cylindrical gear, 19 is a ninth cylindrical gear, 20 is a tenth cylindrical gear, 21 is an internal gear, 22 is an external gear, 23 is a conical cylinder member, 24 is an external rotor shaft, 25 is an internal rotor shaft, 26 is a first triple gear shaft, 27 is a second triple gear shaft, and 28 is a third triple gear shaft.
Detailed Description
In order to clearly explain the technical features of the present patent, the following detailed description of the present patent is provided in conjunction with the accompanying drawings.
The invention is shown in figures 1-3, and comprises a bevel gear power confluence transmission unit, a cylindrical gear power shunt transmission unit, a cylindrical gear power confluence transmission unit and an output unit which all adopt an ordinary gear train; the power of an engine is input to the converging-diverging gear shaft through the bevel gear power converging transmission unit, the power of the converging-diverging gear shaft is split and decelerated through the cylindrical gear power diverging transmission unit, the split power is converged through the cylindrical gear power converging transmission unit, and the power is output to an inner rotor shaft and an outer rotor shaft in the output unit;
the bevel gear power converging transmission unit comprises a first-stage reversing bevel gear pair and a second-stage power converging bevel gear pair;
the first stage reversing bevel gear pair is provided with at least two driving bevel gears which are connected with the engine; the second-stage power converging bevel gear pair is provided with at least two driving bevel gears and one driven bevel gear, the driving bevel gears in the second-stage power converging bevel gear pair correspond to the driven bevel gears in the first-stage reversing bevel gear pair one by one and are positioned on the same wheel shaft, and all the driving bevel gears in the second-stage power converging bevel gear pair are meshed with the driven bevel gears simultaneously;
the cylindrical gear power splitting transmission unit comprises a third-stage power splitting cylindrical gear pair;
the third-stage power splitting cylindrical gear pair is internally provided with a driving gear and at least three driven gears, the driving gear in the third-stage power splitting cylindrical gear pair and the driven bevel gear in the second-stage power converging bevel gear pair are positioned on the same wheel shaft, and all the driven gears in the third-stage power splitting cylindrical gear pair are simultaneously meshed with the driving gear;
the cylindrical gear power converging transmission unit comprises a fourth-stage internal meshing power converging cylindrical gear pair and a fourth-stage external meshing power converging cylindrical gear pair;
the fourth-stage internal meshing power converging cylindrical gear pair is provided with at least three driving gears and an internal gear 21, the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair correspond to the driven gears in the third-stage power splitting cylindrical gear pair one by one and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair are meshed with the internal gear 21 at the same time;
the fourth-stage external meshing power converging cylindrical gear pair is provided with at least three driving gears and an external gear 22, the driving gears in the fourth-stage external meshing power converging cylindrical gear pair and the driven gears in the third-stage power splitting cylindrical gear pair are in one-to-one correspondence and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage external meshing power converging cylindrical gear pair are meshed with the external gear 22 at the same time;
the output unit comprises an outer rotor shaft 24 fixedly connected with the inner gear 21 and an inner rotor shaft 25 fixedly connected with the outer gear 22, and the four parts of the inner gear 21, the outer gear 22, the outer rotor shaft 24 and the inner rotor shaft 25 have the same axle center; the inner rotor shaft 25 is connected with a plurality of upper rotors, the outer rotor shaft 24 is connected with a plurality of lower rotors, the outer rotor shaft 24 is sleeved outside the inner rotor shaft 25 and keeps the same axle center, so that a coaxial double-rotor structure is formed;
a driven bevel gear in the second-stage power converging bevel gear pair, a driving gear in the third-stage power splitting cylindrical gear pair and wheel shafts at the same position of the driven bevel gear and the driving gear form a converging-diverging gear shaft; the converging-diverging gear shaft and the inner rotor shaft 25 and the outer rotor shaft 24 in the output unit are coaxial.
Therefore, after the power of the engine is input, the power can be uniformly and balancedly converged and decelerated to the converging and diverging gear shafts through the bevel gear power converging transmission unit, then uniformly and balancedly shunted and decelerated to each cylindrical gear power diverging transmission unit through the converging and diverging gear shafts, finally the shunted power is uniformly and balancedly converged and decelerated to the output unit through the cylindrical gear power converging transmission unit, and the power is output to the inner rotor wing and the outer rotor wing of the helicopter through the output unit.
The scheme has the following outstanding characteristics in the power transmission process:
firstly, compared with the traditional Sikorsky double-rotor coaxial configuration, the structure is influenced by the distance between the engines, a plurality of first gear shafts are necessarily kept at a certain distance, and thus, an inner gear finally connected with an outer rotor shaft needs a larger structural size to meet the distance requirement of the engines; in the scheme, the power is firstly converged towards one converging-diverging gear shaft and then transmitted to the inner gear through other parts, so that the size of the inner gear is not limited by the requirement of the distance of the engine any more, and the integral volume of the transmission device can be reduced to a great extent, so that the space layout is more reasonable and more convenient.
And secondly, because the converging-diverging gear shaft and the inner rotor shaft and the outer rotor shaft in the output unit are coaxial, and all driving bevel gears in the second-stage power converging bevel gear pair and all driven gears in the third-stage power diverging cylindrical gear pair are uniformly arranged along the circumferential direction of the converging-diverging gear shaft, the problem of unbalanced load can be solved to the greatest extent in the power transmission process, and stable, uniform and balanced power transmission is realized.
Thirdly, because the bevel gear power confluence transmission unit, the cylindrical gear power diversion transmission unit, the cylindrical gear power confluence transmission unit and the output unit in the present case all adopt a dead axle gear train, and the last stage of dead axle transmission is realized through the fourth stage internal meshing power confluence cylindrical gear pair and the fourth stage external meshing power confluence cylindrical gear pair, therefore, the problem that the last stage of transmission caused by planetary gear transmission is small can be effectively solved, and the planetary gear transmission device has the advantages of large transmission ratio, compact structure and the like.
The drive bevel gear in the second-stage power converging bevel gear pair, the driven bevel gear in the first-stage reversing bevel gear pair and wheel shafts at the same position of the drive bevel gear and the driven bevel gear form a duplicate gear shaft together, and all the duplicate gear shafts are uniformly arranged along the circumferential direction of the converging-diverging gear shafts.
The driving gear in the fourth-stage internal meshing power converging cylindrical gear pair, the driving gear in the fourth-stage external meshing power converging cylindrical gear pair, the driven gear in the third-stage power splitting cylindrical gear pair and wheel shafts at the same positions of the driving gear, the driving gear and the driven gear form a triple gear shaft together, and all the triple gear shafts are uniformly arranged along the circumferential direction of the converging and splitting gear shafts and are located in an area between the internal gear and the external gear.
The inner gear 21 is fixedly connected to an outer rotor shaft 24 via a conical barrel 23, and the outer gear 22 is located within the conical barrel 23 and is fixedly connected to an inner rotor shaft 25. Specifically, an outer rotor shaft of the output unit is in fit connection with the conical barrel part through an inner spline and an outer spline, and the conical barrel part is in fit connection with the inner gear through an inner spline and an outer spline; the inner rotor shaft of the output unit is in fit connection with the outer gear through an inner spline and an outer spline; the inner rotor shaft is positioned in the outer rotor shaft and supported by the intermediate bearing, and the inner rotor shaft and the outer rotor shaft coaxially rotate in opposite directions.
The first stage reversing bevel gear pair and the second stage power converging bevel gear pair are both spiral bevel gears, the third stage power splitting cylindrical gear pair is a straight-tooth cylindrical gear, the fourth stage internal meshing power converging cylindrical gear pair is a herringbone gear or a straight-tooth cylindrical gear, and the fourth stage external meshing power converging cylindrical gear pair is a herringbone gear or a straight-tooth cylindrical gear.
All the double gear shafts, all the triple gear shafts, the converging and diverging gear shafts, the inner rotor shafts and the outer rotor shafts adopt fixed-axis gear trains, namely all the gear shafts are positioned in the main speed reduction box body and are rotatably connected with the main speed reduction box body, and the axes of all the gear shafts cannot generate relative displacement after the assembly is finished.
The transmission ratios of the first-stage reversing bevel gear pair, the second-stage power converging bevel gear pair, the third-stage power splitting cylindrical gear pair, the fourth-stage internal meshing power converging cylindrical gear pair and the fourth-stage external meshing power converging cylindrical gear pair are all larger than 1. Thereby realizing a four-stage dead axle deceleration structure.
The transmission ratio of the fourth-stage internal meshing power converging cylindrical gear pair is the same as that of the fourth-stage external meshing power converging cylindrical gear pair. The opposite rotational directions of the internal gear 21 and the external gear 22 are added, so that the outer rotor shaft 24 fixedly connected to the internal gear 21 and the inner rotor shaft 25 fixedly connected to the external gear 22 perform coaxial reverse rotation at a constant speed.
In the following, three first-stage reversing bevel gear pairs and three triple gear shafts are taken as embodiments of the present disclosure, and are described representatively with reference to fig. 2 to 3:
the first stage reversing bevel gear pair comprises a first bevel gear 1, a third bevel gear 3 and a fifth bevel gear 5 as driving bevel gears, and a second bevel gear 2, a fourth bevel gear 4 and a sixth bevel gear 6 as driven bevel gears.
The first bevel gear 1 is meshed with the second bevel gear 2, the third bevel gear 3 is meshed with the fourth bevel gear 4, and the fifth bevel gear 5 is meshed with the sixth bevel gear 6; the first bevel gear 1, the third bevel gear 3 and the fifth bevel gear 5 are respectively arranged on three power input gear shafts and are connected with an engine of the helicopter through a one-way clutch.
The second stage power converging bevel gear pair includes a seventh bevel gear 7, an eighth bevel gear 8, a ninth bevel gear 9 as a driving bevel gear, and a tenth bevel gear 10 as a driven bevel gear.
The second bevel gear 2 and the ninth bevel gear 9 are positioned on the same duplicate gear shaft, the fourth bevel gear 4 and the eighth bevel gear 8 are positioned on the same duplicate gear shaft, and the sixth bevel gear 6 and the seventh bevel gear 7 are positioned on the same duplicate gear shaft; the seventh bevel gear 7, the eighth bevel gear 8 and the ninth bevel gear 9 are all meshed with the tenth bevel gear 10, and meanwhile, the seventh bevel gear 7, the eighth bevel gear 8 and the ninth bevel gear 9 are uniformly distributed along the circumferential direction of the tenth bevel gear 10 and are not prone to unbalance loading. Like this, through the power confluence, be favorable to realizing the reasonable demand of arranging and promoting power of engine to and follow-up inside other parts's of main reducer evenly arrange, improve space utilization, reduce the volume and the quality of main reducer box.
The third stage power split cylindrical gear pair includes a first cylindrical gear 11 as a driving gear, and a second cylindrical gear 12, a third cylindrical gear 13, and a fourth cylindrical gear 14 as driven gears.
The first cylindrical gear 11 is simultaneously meshed with the second cylindrical gear 12, the third cylindrical gear 13 and the fourth cylindrical gear 14, and meanwhile, the second cylindrical gear 12, the third cylindrical gear 13 and the fourth cylindrical gear 14 are uniformly distributed along the circumferential direction of the first cylindrical gear 11, so that unbalance loading is not easy to occur.
The fourth-stage internal meshing power converging cylindrical gear pair comprises a fifth cylindrical gear 15, a sixth cylindrical gear 16 and a seventh cylindrical gear 17 which are used as driving gears, and an internal gear 21 which is used as a driven gear; the internal gear 21 is connected with the fifth cylindrical gear 15, the sixth cylindrical gear 16 and the seventh cylindrical gear 17 in an internal meshing mode.
The fourth-stage external meshing power confluence cylindrical gear pair comprises an eighth cylindrical gear 18 serving as a driving gear, a ninth cylindrical gear 19, a tenth cylindrical gear 20 and an external gear 22 serving as a driven gear; the external gear 22 is externally engaged with the eighth spur gear 18, the ninth spur gear 19, and the tenth spur gear 20, respectively.
The second cylindrical gear 12, the fifth cylindrical gear 15, the eighth cylindrical gear 18 and the wheel axle at the same position of the third cylindrical gear 13, the sixth cylindrical gear 16, the ninth cylindrical gear 19 and the wheel axle at the same position of the third cylindrical gear 19 form a third triple gear axle 27, and the fourth cylindrical gear 14, the seventh cylindrical gear 17, the tenth cylindrical gear 20 and the wheel axle at the same position of the third cylindrical gear 20 form a third triple gear axle 28.
Therefore, the converging-diverging gear shaft can simultaneously drive the inner gear 21 and the outer gear 22 to rotate through the first triple gear shaft 26, the second triple gear shaft 27 and the third triple gear shaft 28, so that the inner rotor shaft 25 and the outer rotor shaft 24 are driven to coaxially rotate reversely.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
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.
Claims (7)
1. A cylindrical gear shunt coaxial dual-rotor helicopter transmission device is characterized by comprising a bevel gear power confluence transmission unit, a cylindrical gear power shunt transmission unit, a cylindrical gear power confluence transmission unit and an output unit;
the bevel gear power converging transmission unit comprises a first stage reversing bevel gear pair and a second stage power converging bevel gear pair;
the first stage reversing bevel gear pair is provided with at least two driving bevel gears which are connected with the engine; the second-stage power converging bevel gear pair is provided with at least two driving bevel gears and one driven bevel gear, the driving bevel gears in the second-stage power converging bevel gear pair correspond to the driven bevel gears in the first-stage reversing bevel gear pair one by one and are positioned on the same wheel shaft, and all the driving bevel gears in the second-stage power converging bevel gear pair are meshed with the driven bevel gears simultaneously;
the cylindrical gear power splitting transmission unit comprises a third-stage power splitting cylindrical gear pair;
the third-stage power splitting cylindrical gear pair is internally provided with a driving gear and at least three driven gears, the driving gear in the third-stage power splitting cylindrical gear pair and the driven bevel gear in the second-stage power converging bevel gear pair are positioned on the same wheel shaft, and all the driven gears in the third-stage power splitting cylindrical gear pair are simultaneously meshed with the driving gear;
the cylindrical gear power converging transmission unit comprises a fourth-stage internal meshing power converging cylindrical gear pair and a fourth-stage external meshing power converging cylindrical gear pair;
the fourth-stage internal meshing power converging cylindrical gear pair is provided with at least three driving gears and an internal gear (21), the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair correspond to the driven gears in the third-stage power splitting cylindrical gear pair one by one and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage internal meshing power converging cylindrical gear pair are meshed with the internal gear (21) at the same time;
the fourth-stage external meshing power converging cylindrical gear pair is provided with at least three driving gears and an external gear (22), the driving gears in the fourth-stage external meshing power converging cylindrical gear pair and the driven gears in the third-stage power splitting cylindrical gear pair are in one-to-one correspondence and are positioned on the same wheel shaft, and all the driving gears in the fourth-stage external meshing power converging cylindrical gear pair are meshed with the external gear (22) at the same time;
the output unit comprises an outer rotor shaft (24) fixedly connected with an inner gear (21) and an inner rotor shaft (25) fixedly connected with an outer gear (22), and the inner gear (21), the outer gear (22), the outer rotor shaft (24) and the inner rotor shaft (25) are coaxial;
a driven bevel gear in the second-stage power converging bevel gear pair, a driving gear in the third-stage power splitting cylindrical gear pair and wheel shafts at the same position of the driven bevel gear and the driving gear form a converging-diverging gear shaft; the converging-diverging gear shaft and an inner rotor shaft (25) and an outer rotor shaft (24) in the output unit are coaxial.
2. The cylindrical gear shunt coaxial twin rotor helicopter transmission of claim 1 wherein the drive bevel gears of the second stage power converging bevel gear pair, the driven bevel gears of the first stage reversing bevel gear pair and the axles thereof together form a dual gear shaft, all of which are uniformly arranged along the circumference of the converging and diverging gear shafts.
3. The cylindrical gear shunt coaxial twin-rotor helicopter transmission of claim 1 wherein the drive gear of the fourth stage internal meshing power converging cylindrical gear pair, the drive gear of the fourth stage external meshing power converging cylindrical gear pair, the driven gear of the third stage power diverging cylindrical gear pair and the wheel axles at the same location together form a triple gear shaft, and all the triple gear shafts are uniformly arranged along the circumference of the converging-diverging gear shaft and are located in the area between the internal gear and the external gear.
4. A spur-gear shunt coaxial twin rotor helicopter transmission according to claim 1 wherein the inner gear (21) is fixedly connected to the outer rotor shaft (24) by means of a conical barrel (23) and the outer gear (22) is located within the conical barrel (23) and is fixedly connected to the inner rotor shaft (25).
5. The dual coaxial helicopter transmission with spur gear shunt according to claim 1 wherein the first stage reversing bevel gear pair and the second stage power converging bevel gear pair are both spiral bevel gears, the third stage power diverging cylindrical gear pair is a spur gear, the fourth stage internal meshing power converging cylindrical gear pair is a herringbone gear or a spur gear, and the fourth stage external meshing power converging cylindrical gear pair is a herringbone gear or a spur gear.
6. A spur-gear-split coaxial twin-rotor helicopter transmission according to claim 1 wherein the gear ratios of the first stage reversing bevel gear pair, the second stage power splitting bevel gear pair, the third stage power splitting bevel gear pair, the fourth stage internal meshing power converging bevel gear pair and the fourth stage external meshing power converging bevel gear pair are all greater than 1.
7. A spur-gear-split coaxial twin-rotor helicopter transmission according to claim 1 in which the fourth stage internal-meshing power-converging spur gear pair has the same gear ratio as the fourth stage external-meshing power-converging spur gear pair.
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| WO2022260634A1 (en) * | 2021-06-07 | 2022-12-15 | Ali Turan | Differential gearbox with output shafts that are on the same side and rotate in reverse directions |
| CN113483060A (en) * | 2021-07-07 | 2021-10-08 | 重庆大学 | Torque-dividing gear transmission speed reducer for main speed reducer of coaxial helicopter |
| CN114110116A (en) * | 2021-12-02 | 2022-03-01 | 中国农业大学 | Dual-power redundancy driven multi-stage transmission device |
| CN115123950B (en) * | 2022-07-18 | 2024-01-12 | 中科长城海洋信息系统有限公司 | Upright post rotating mechanism and marine upright post winch |
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| CN201116589Y (en) * | 2007-08-06 | 2008-09-17 | 刘淮滨 | Constant speed-differential speed, double-shaft reversal export variable-speed gear |
| CN103968003B (en) * | 2014-05-20 | 2016-08-24 | 西北工业大学 | An a kind of Helicopter Main Reducer point torsion drive mechanism |
| CN107559383A (en) * | 2017-07-18 | 2018-01-09 | 南京航空航天大学 | A kind of coaxial rotor transmission device with power dividing twice |
| CN109707798A (en) * | 2019-01-07 | 2019-05-03 | 南京航空航天大学 | The coaxial rotor transmission device of bevel gear-roller gear power dividing twice |
| CN111268111A (en) * | 2020-02-27 | 2020-06-12 | 西安工业大学 | Bevel gear coaxial contra-rotating dual-rotor transmission device with twice power splitting |
| CN111268112B (en) * | 2020-02-27 | 2024-03-15 | 西安工业大学 | Cone tooth-planetary tooth compound split converging coaxial double-rotor variable speed transmission device |
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