CN114962427B - Structure for realizing multidirectional transmission of engine rotor by double transmission shafts - Google Patents
Structure for realizing multidirectional transmission of engine rotor by double transmission shafts Download PDFInfo
- Publication number
- CN114962427B CN114962427B CN202210761991.XA CN202210761991A CN114962427B CN 114962427 B CN114962427 B CN 114962427B CN 202210761991 A CN202210761991 A CN 202210761991A CN 114962427 B CN114962427 B CN 114962427B
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- shaft
- transmission
- ring
- peripheral surface
- transmission shaft
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Classifications
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/023—Shafts; Axles made of several parts, e.g. by welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/36—Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
A structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft comprises a transmission shaft, a linkage shaft and a connecting shaft; the transmission shaft and the linkage shaft are coaxially arranged, and the linkage shaft is positioned in the transmission shaft; a first connecting ring is arranged in the transmission shaft near the front end, and the transmission shaft is connected with a linkage shaft through the first connecting ring; external splines are respectively arranged at two ends of the outer peripheral surface of the transmission shaft; the connecting shaft is characterized in that a second connecting ring with an L-shaped cross section is arranged on the inner peripheral surface of the connecting shaft, a first internal spline is arranged at the left end of the inner peripheral surface, the second connecting ring is sleeved on the outer peripheral surface of the right end of the connecting shaft, and the first internal spline of the connecting shaft is meshed with the external spline of the right end of the transmission shaft for transmission. In the invention, the transmission shaft, the linkage shaft and the connecting shaft form a double transmission shaft structure, and the three form a loop-shaped connecting structure, so that the linkage of the upper and lower rotating parts and the front and rear rotating parts is realized, and the multi-directional transmission function is completed in a limited space.
Description
Technical Field
The invention relates to the technical field of aeroengines, in particular to a structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft.
Background
The shaft parts of the aeroengine are in a working state of high rotation speed and variable load, the transmission system is an important subsystem for driving the engine and the airplane accessories to work, and is an important bridge for establishing a relation between a rotor structure and the central transmission and the accessories, and the complex working environment has higher requirements on the transmission shaft structure and the assembly design.
The transmission shaft is used for supporting the rotating parts, transmitting torque and motion, and has high precision requirement, and the strength life, the working efficiency, the reliability, the engine space size, the process period, the processing and manufacturing difficulty, the use maintainability and the like are required to be considered in design.
The transmission shaft of present design is single multi-functional axle, realizes connection and power transmission effect on an epaxial, simple structure, but has space and length restriction, and too long rigidity can be poor, and the diameter is too big can reduce work efficiency, is unfavorable for the connection of complicated rotating parts, and can not multidirectional transmission function of turning round.
Disclosure of Invention
The invention mainly aims to provide a structure for realizing multidirectional transmission of an engine rotor by using a double transmission shaft, and aims to solve the technical problem that the conventional transmission shaft cannot realize the multidirectional torque transmission function.
In order to achieve the above purpose, the present invention provides a structure for realizing multidirectional transmission of an engine rotor by using a double transmission shaft, comprising a transmission shaft, a linkage shaft and a connecting shaft; the transmission shaft and the linkage shaft are coaxially arranged, and the linkage shaft is positioned in the transmission shaft; a first connecting ring is arranged in the transmission shaft near the front end, and the transmission shaft is connected with a linkage shaft through the first connecting ring; external splines are respectively arranged at two ends of the outer peripheral surface of the transmission shaft; a second internal spline is arranged on the inner peripheral surface of the left end of the linkage shaft; the connecting shaft is characterized in that a second connecting ring with an L-shaped cross section is arranged on the inner peripheral surface of the connecting shaft, a first internal spline is arranged at the left end of the inner peripheral surface, the second connecting ring is sleeved on the outer peripheral surface of the right end of the connecting shaft, and the first internal spline of the connecting shaft is meshed with the external spline of the right end of the transmission shaft for transmission.
Preferably, a positioning pin hole is arranged in the middle of the connecting shaft.
Preferably, the wall thickness of the front section and the middle section of the connecting shaft is larger than that of the rear section; and a vent hole is arranged at the position of the rear section of the connecting shaft close to the middle section.
Preferably, the inner wall of the middle section of the connecting shaft and the vertical side wall of the second connecting ring are provided with lead grooves.
Preferably, a third sealing ring accommodating groove is formed in the outer peripheral surface of the middle section of the connecting shaft, and a sealing ring is arranged in the third sealing ring accommodating groove.
Preferably, the first connecting ring of the transmission shaft is provided with an oil throwing hole.
Preferably, a snap ring is arranged at the left end position of the outer peripheral surface of the linkage shaft, a threaded hole is arranged on the snap ring, an annular clamping groove is formed in the left side of the snap ring, the first connecting ring is installed in the annular clamping groove, and the first connecting ring is in screw connection with the snap ring.
Preferably, a first sealing ring accommodating groove is formed in the inner peripheral surface of the left end of the linkage shaft; a sealing ring is arranged in the first sealing ring accommodating groove, and the number of the first sealing ring accommodating grooves is two.
Preferably, the outer peripheral surface of the right end of the linkage shaft is provided with two second sealing ring accommodating grooves, and sealing rings are arranged in the two second sealing ring accommodating grooves; the edge of the right end of the linkage shaft is provided with a chamfer.
Preferably, a limiting ring is arranged on the outer peripheral surface of the right end of the linkage shaft, and the second connecting ring abuts against the limiting ring.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
in the invention, the transmission shaft, the linkage shaft and the connecting shaft form a double transmission shaft structure, and the three form a loop-shaped connecting structure, so that the linkage of the upper and lower rotating parts and the front and rear rotating parts is realized, the multidirectional transmission function is completed in a limited space, the length of the transmission shaft is reduced, and the structure is concise, flexible and changeable and has strong expansibility. Specifically, the transmission shaft not only realizes torque transmission, but also plays a role of a series connection shaft and a parallel connection linkage shaft; the connecting shaft realizes the connection and positioning with the rear-end rotating part and simultaneously has the function of connecting with the transmission shaft; the linkage shaft realizes the function of transmitting torque to the lower rotating part.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a transmission shaft according to the present invention;
FIG. 3 is a schematic view of a linkage shaft according to the present invention;
FIG. 4 is a schematic view of a connecting shaft according to the present invention;
fig. 5 is a schematic view of the present invention assembled with a rotating member.
Wherein: 1. a transmission shaft; 2. a linkage shaft; 3. a connecting shaft; 4. an external spline; 5. a first internal spline; 6. a fixing pin hole; 7. a vent hole; 8. chamfering; 9. a second seal ring accommodating groove; 10. a first seal ring accommodating groove; 11. a second internal spline; 12. a threaded hole; 13. an oil throwing hole; 14. a wire slot; 15. a first connection ring; 16. a third seal ring accommodating groove; 17. a second connecting ring; 18. a clasp; 19. a limiting ring; 20. a third seal ring accommodating groove; 21. a first rotating member; 22. a second rotating member; 23. and a third rotating member.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1 to 4, a structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft comprises a transmission shaft 1, a linkage shaft 2 and a connecting shaft 3; the transmission shaft 1 and the linkage shaft 2 are coaxially arranged, and the linkage shaft 2 is positioned in the transmission shaft 1; a first connecting ring 15 is arranged in the transmission shaft 1 near the front end, and the transmission shaft 1 is connected with the linkage shaft 2 through the first connecting ring 15; external splines 4 are respectively arranged at two ends of the outer peripheral surface of the transmission shaft 1; a second internal spline 11 is arranged on the inner peripheral surface of the left end of the linkage shaft 2; the inner peripheral surface of the connecting shaft 3 is provided with a second connecting ring 17 with an L-shaped cross section, the left end of the inner peripheral surface is provided with a first internal spline 5, the second connecting ring 17 is sleeved on the outer peripheral surface of the right end of the linkage shaft 2, and the first internal spline 5 of the connecting shaft 3 is meshed with the external spline 4 of the right end of the transmission shaft 1 for transmission. To increase the surface hardness of the external spline 4, the external spline 4 is nitrided.
The transmission shaft 1 is made of high-quality structural steel for aviation, and is required to have high wear resistance and high fatigue strength. The connecting shaft 3 is made of high-temperature alloy material, and is required to have high temperature resistance, corrosion resistance and good fatigue performance. The universal driving shaft 2 is made of high-quality structural steel for aviation, and is required to have good fatigue performance and strength limit.
As shown in fig. 4 and 5, a positioning pin hole 6 is provided in the middle of the connecting shaft 3. When the third rotating member 23 is mounted on the connecting shaft 3, the third rotating member 23 is connected and positioned with the positioning pin through the positioning pin hole 6, and the positioning pin can limit the rotation of the third rotating member 23, thereby playing a role in transmitting torque.
As shown in fig. 4, the front and middle parts of the connecting shaft 3 are stressed greatly, and the rear ends only play a role in cooperation, so that the wall thickness of the front section and the middle section of the connecting shaft 3 is larger than that of the rear section. A vent hole 7 is arranged at the position close to the middle section of the rear section of the connecting shaft 3. The vent 7 ensures the air cavity and axial force behind the rotating part, and can also realize the additional function of testing the lead. A wire slot 14 is provided on the inner wall of the middle section of the connecting shaft 3 and on the vertical side wall of the second connecting ring 17. The test wire of the upper end rotating part is led to the lower end through the vent hole 7 and the lead groove 14.
As shown in fig. 4, a third seal ring accommodating groove 16 is provided on the outer peripheral surface of the middle section of the connecting shaft 3, and a seal ring is provided in the third seal ring accommodating groove 16. The sealing ring is provided for sealing between the connecting shaft 3 and the third rotating member 23.
As shown in fig. 2 and 5, the oil drain hole 13 is provided in the first connecting ring 15 of the propeller shaft 1. The oil in the right chamber of the first connecting ring 15 is thrown to the left chamber, preventing the right chamber from being excessively lubricated.
As shown in fig. 1 to 3, a collar 18 is provided at the left end of the outer circumferential surface of the universal driving shaft 2, a screw hole 12 is provided in the collar 18, an annular clamping groove is formed at the left side of the collar 18, the first connecting ring 15 is installed in the annular clamping groove, and the first connecting ring 15 is screwed with the collar 18.
As shown in fig. 3 and 5, a first seal ring accommodating groove 10 is provided on the inner peripheral surface of the left end of the universal driving shaft 2; a seal ring is provided in the first seal ring accommodating groove 10, and the number of the first seal ring accommodating grooves 10 is two.
As shown in fig. 3 and 5, the second seal ring accommodating grooves 9 are formed in the outer peripheral surface of the right end of the linkage shaft 2, two seal rings are arranged in the second seal ring accommodating grooves 9, the seal between the linkage shaft 2 and the connecting shaft 3 is realized by using the seal rings, and the probability of two seal rings simultaneously causing problems is far smaller than that of one seal ring, so that the purpose of setting the two seal rings is to reduce the probability of sealing problems and further ensure the sealing effect. The edge of the right end of the linkage shaft 2 is provided with a chamfer 8, a test lead path is protected by the chamfer 8, and the data linkage and measurement are realized by leading the wall surface of the linkage shaft 2 to the front end or the lower end of the second rotating part 22.
As shown in fig. 3 and 5, a stopper ring 19 is provided on the outer peripheral surface of the right end of the linkage shaft 2, and the second connecting ring 17 abuts against the stopper ring 19. By using the stop ring 19, the axial position of the connecting shaft 3 can be positioned.
When the combined transmission device is used, the combined connection of the front rotating part, the rear rotating part, the upper rotating part and the lower rotating part is realized, and the force transmission is carried out, specifically, the first transmission part 21 is matched and transmitted with the external spline 4 on the outer circumferential surface of the left end of the transmission shaft 1, and the second rotating part 22 is matched and transmitted with the second internal spline 11 of the linkage shaft 2; the third rotating member 23 is provided on the outer peripheral surface of the connecting shaft 3. The drive shaft 1 both achieves torque transmission and functions as a series connection shaft 3 and a parallel linkage shaft 2. The connecting shaft 3 is connected with the rear end third rotating part 23 for positioning, and is connected with the transmission shaft 1. The transmission shaft 1, the linkage shaft 2 and the connecting shaft 3 form a loop-shaped connecting structure. Through the sealing ring structure, the oil-gas separation effect between the oil cavity and the air cavity is realized.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The structure for realizing multidirectional transmission of the engine rotor by the double transmission shafts is characterized by comprising a transmission shaft (1), a linkage shaft (2) and a connecting shaft (3);
the transmission shaft (1) and the linkage shaft (2) are coaxially arranged, and the linkage shaft (2) is positioned in the transmission shaft (1); a first connecting ring (15) is arranged in the transmission shaft (1) close to the front end, and the transmission shaft (1) is connected with the linkage shaft (2) through the first connecting ring (15);
external splines (4) are respectively arranged at two ends of the outer peripheral surface of the transmission shaft (1);
a second internal spline (11) is arranged on the inner peripheral surface of the left end of the linkage shaft (2);
the connecting shaft (3) is provided with a second connecting ring (17) with an L-shaped cross section on the inner peripheral surface, the left end of the inner peripheral surface is provided with a first internal spline (5), the second connecting ring (17) is sleeved on the outer peripheral surface of the right end of the connecting shaft (2), and the first internal spline (5) of the connecting shaft (3) is meshed with the external spline (4) of the right end of the transmission shaft (1).
2. A structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft according to claim 1, wherein a positioning pin hole (6) is provided in the middle of the connecting shaft (3).
3. A structure for realizing multidirectional transmission of an engine rotor according to claim 1, wherein the wall thickness of the front section and the middle section of said connecting shaft (3) is greater than the wall thickness of the rear section; and a vent hole (7) is arranged at the position of the rear section of the connecting shaft (3) close to the middle section.
4. A structure for realizing multidirectional transmission of an engine rotor according to claim 3, wherein the guide grooves (14) are provided on the inner wall of the middle section of the connecting shaft (3) and on the vertical side wall of the second connecting ring (17).
5. A structure for realizing multidirectional transmission of an engine rotor according to claim 3, wherein a third seal ring accommodating groove (16) is provided on the outer peripheral surface of the middle section of the connecting shaft (3), and a seal ring is provided in the third seal ring accommodating groove (16).
6. A structure for realizing multidirectional transmission of an engine rotor according to claim 1, wherein an oil drain hole (13) is provided in a first connecting ring (15) of the transmission shaft (1).
7. The structure for realizing multidirectional transmission of an engine rotor according to claim 1, wherein a snap ring (18) is provided at the left end position of the outer circumferential surface of the universal driving shaft (2), a threaded hole (12) is provided on the snap ring (18), an annular clamping groove is formed at the left side of the snap ring (18), the first connecting ring (15) is installed in the annular clamping groove, and the first connecting ring (15) is in screw connection with the snap ring (18).
8. The structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft according to claim 1, wherein a first seal ring accommodating groove (10) is provided on the inner peripheral surface of the left end of the linkage shaft (2); a sealing ring is arranged in the first sealing ring accommodating groove (10), and the number of the first sealing ring accommodating grooves (10) is two.
9. The structure for realizing multidirectional transmission of an engine rotor by a double transmission shaft according to claim 1, wherein second seal ring accommodating grooves (9) are arranged on the outer peripheral surface of the right end of the linkage shaft (2), the number of the second seal ring accommodating grooves (9) is two, and seal rings are arranged in the second seal ring accommodating grooves; the edge of the right end of the linkage shaft (2) is provided with a chamfer (8).
10. A structure for realizing multidirectional transmission of an engine rotor according to claim 1, wherein a stopper ring (19) is provided on the outer peripheral surface of the right end of the universal driving shaft (2), and the second connecting ring (17) abuts against the stopper ring (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761991.XA CN114962427B (en) | 2022-06-30 | 2022-06-30 | Structure for realizing multidirectional transmission of engine rotor by double transmission shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761991.XA CN114962427B (en) | 2022-06-30 | 2022-06-30 | Structure for realizing multidirectional transmission of engine rotor by double transmission shafts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114962427A CN114962427A (en) | 2022-08-30 |
| CN114962427B true CN114962427B (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210761991.XA Active CN114962427B (en) | 2022-06-30 | 2022-06-30 | Structure for realizing multidirectional transmission of engine rotor by double transmission shafts |
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| Country | Link |
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| CN (1) | CN114962427B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282358A (en) * | 1991-05-28 | 1994-02-01 | General Electric Company | Gas turbine engine dual inner central drive shaft |
| CN105745400A (en) * | 2013-11-21 | 2016-07-06 | 斯奈克玛 | Front enclosure which is sealed during the modular dismantling of a turbojet with reduction gear |
| CN111946403A (en) * | 2020-07-31 | 2020-11-17 | 中国航发贵阳发动机设计研究所 | Coupling for connecting aviation rotors |
| DE102020131802A1 (en) * | 2019-12-05 | 2021-06-10 | Rolls-Royce Plc | GEAR-GAS TURBINE ENGINE |
| FR3106160A1 (en) * | 2020-01-13 | 2021-07-16 | Safran Aircraft Engines | Set for a turbomachine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8015798B2 (en) * | 2007-12-13 | 2011-09-13 | United Technologies Corporation | Geared counter-rotating gas turbofan engine |
-
2022
- 2022-06-30 CN CN202210761991.XA patent/CN114962427B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282358A (en) * | 1991-05-28 | 1994-02-01 | General Electric Company | Gas turbine engine dual inner central drive shaft |
| CN105745400A (en) * | 2013-11-21 | 2016-07-06 | 斯奈克玛 | Front enclosure which is sealed during the modular dismantling of a turbojet with reduction gear |
| DE102020131802A1 (en) * | 2019-12-05 | 2021-06-10 | Rolls-Royce Plc | GEAR-GAS TURBINE ENGINE |
| FR3106160A1 (en) * | 2020-01-13 | 2021-07-16 | Safran Aircraft Engines | Set for a turbomachine |
| CN111946403A (en) * | 2020-07-31 | 2020-11-17 | 中国航发贵阳发动机设计研究所 | Coupling for connecting aviation rotors |
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| Publication number | Publication date |
|---|---|
| CN114962427A (en) | 2022-08-30 |
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