CN115899215B - Helical gear - Google Patents
Helical gearInfo
- Publication number
- CN115899215B CN115899215B CN202211433905.9A CN202211433905A CN115899215B CN 115899215 B CN115899215 B CN 115899215B CN 202211433905 A CN202211433905 A CN 202211433905A CN 115899215 B CN115899215 B CN 115899215B
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- China
- Prior art keywords
- rotation axis
- arc segment
- helical gear
- segment
- spoke
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Gears, Cams (AREA)
Abstract
本申请公开了一种斜齿轮，其斜齿轮的辐板部包括第一辐板、第二辐板和若干连接柱；第一辐板和第二辐板沿轴向布设；第一辐板呈圆环形；第二辐板包括本体和连接体，本体呈圆环形，其内缘连接轴连接部；连接体用于连接本体和斜齿部，连接体彼此背离的两个表面在过斜齿轮的转动轴线的截面上形成的两条线段彼此平行且均相对转动轴线倾斜；连接柱轴向延伸并绕转动轴线的周向均布，连接柱用于连接第一辐板和本体彼此相对的两个表面且其位置靠近连接体。上述斜齿轮具有创新构型并在保证满足应力要求的前提下实现了轻量化。
The present application discloses a helical gear, wherein the spoke portion of the helical gear comprises a first spoke, a second spoke and a plurality of connecting columns; the first spoke and the second spoke are arranged axially; the first spoke is in a circular ring shape; the second spoke comprises a body and a connecting body, the body is in a circular ring shape, and its inner edge is connected to the shaft connecting portion; the connecting body is used to connect the body and the helical gear portion, and two lines formed by two surfaces of the connecting body that are opposite to each other on the cross section of the rotating axis of the helical gear are parallel to each other and are both inclined relative to the rotating axis; the connecting columns extend axially and are evenly distributed around the circumference of the rotating axis, and the connecting columns are used to connect the two surfaces of the first spoke and the body that are opposite to each other and are located close to the connecting body. The above-mentioned helical gear has an innovative configuration and is lightweight while ensuring that stress requirements are met.
Description
Technical Field
The present application relates to a helical gear.
Background
The transmission system is one of three key moving parts of the helicopter, is a power transmission part which is indispensable to the power output of a turbine shaft engine, and the performance quality of the transmission system determines the overall performance of the helicopter to a great extent. As a central component of the transmission system, gears/trains have been of interest to researchers. In the aspect of gear design optimization, domestic and foreign scholars develop preliminary researches mainly aiming at the size optimization of the conventional solid-configuration gears, and most of the researches are carried out under the conditions of simple working conditions and single disciplines, and the weight reduction potential of advanced optimization design technology is not fully explored. Particularly, as the transmission system greatly improves the power transmission requirement of the speed reducer, the load borne by the gear is larger and more complex, the self structural size is larger, the weight is heavier, the dynamics problem is more prominent, and the light-weight design requirement under the complex working condition is more urgent.
Disclosure of Invention
The present application has been made to overcome the above-mentioned drawbacks or problems occurring in the prior art, and an object of the present application is to provide a helical gear which has an innovative configuration and can achieve weight saving while satisfying stress requirements.
In order to achieve the above purpose, the following technical scheme is adopted:
The bevel gear comprises a shaft connecting part, a spoke part and a bevel gear part which are connected into a whole from inside to outside in sequence along the radial direction, wherein the spoke part comprises a first spoke, a second spoke and a plurality of connecting posts, the first spoke and the second spoke are distributed along the rotation axis direction of the bevel gear and are closer to the tooth top surface of the bevel gear part, the first spoke is in a circular ring shape, the inner edge of the first spoke is connected with the shaft connecting part, the outer edge of the first spoke is connected with the bevel gear part, the first spoke is provided with two surfaces which are perpendicular to the rotation axis, the second spoke comprises a body and a connecting body which are connected into a whole, the inner edge of the body is connected with the shaft connecting part, the outer edge of the body is connected with the connecting body, the body is provided with two surfaces which are perpendicular to the rotation axis, the connecting body and the bevel gear part are used for connecting the two surfaces which face away from each other, and the two opposite to each other, and the two connecting posts are connected with each other in a circumferential direction, and the two opposite to each other, and the two connecting surfaces are connected with the two opposite to each other, and the two connecting posts are formed in a circumferential direction.
Further, a plurality of first holes are uniformly distributed on the first web around the circumference of the rotation axis, the number of the first holes is the same as that of the connecting columns, the first holes penetrate through two surfaces of the first web in the direction of the rotation axis, and the first holes are opened at the outer edge of the first web.
Further, the projection of the first hole on the projection plane perpendicular to the rotation axis comprises a first straight line segment, a second straight line segment and a first circular arc segment, the first straight line segment and the second straight line segment are connected with the outer edge of the first radial plate and are located on the straight line passing through the projection of the rotation axis on the projection plane, and the first circular arc segment is connected with the first straight line segment and the second straight line segment.
Further, the connector comprises a plurality of connector bodies which are uniformly distributed around the circumference of the rotation axis, the number of the connector bodies is the same as that of the connector columns, and second holes are formed at intervals among the connector bodies.
Further, the projection of the second hole on the projection surface is sequentially composed of a second circular arc section, a third circular arc section, a fourth circular arc section, a third straight line section and a fifth circular arc section, the second circular arc section is connected with the inner edge of the helical tooth portion, the fourth circular arc section is located on the projection of the outer edge of the body, the third circular arc section is connected with the second circular arc section and the fourth circular arc section, the fifth circular arc section is connected with the inner edge of the helical tooth portion, and the third straight line section is connected with the fourth circular arc section and the fifth circular arc section.
Further, the helical gear further comprises a transition portion, the transition portion is connected with the helical gear portion and the first radial plate into a whole and is used for connecting the inner edge of the helical gear portion and the surface of the first radial plate, which is away from the second radial plate, the transition portion is provided with a sixth arc section on the section passing through the rotation axis, and the sixth arc section is bent towards the direction close to the first radial plate.
Further, the number of the connecting posts is 12.
Further, the distance between the two surfaces of the first web is larger than the distance between the two surfaces of the body and the distance between the two surfaces of the connecting body, and the area of the second hole on the projection surface is larger than the area of the first hole on the projection surface.
Further, in the case that the tangential component of the meshing force of the helical gear is less than or equal to 81000N, the axial component of the meshing force of the gear is less than or equal to 23000N, the component of the meshing force of the gear is less than or equal to 53000N, and the rotation speed is less than or equal to 323rpm, if the total mass of the helical gear is less than or equal to 20kg, the yield strength of the material used for the web is greater than or equal to 700Mpa and the density of the material is less than or equal to 7.86g/cm 3, when 113 is less than or equal to 0 is less than or equal to 120 and 176.85 is less than or equal to 1 is less than or equal to 201.4, the following parameters of the helical gear are ：R2≥R1-32.055;R3≤R1-46.4;R4≥173.585;r1≥8;r2≤15;r3≤7.5;r4≤7.5;r5≥1.7;w0≥51.5;W 3 is more than or equal to 8, wherein R 0 is the radius of the inner edge of the spoke plate part, the unit is mm, R 1 is the radius of the outer edge of the spoke plate part, the unit is mm, R 2 is the radius of the outer edge of the body, R 3 is the distance between the circle center of the projection of the connecting column on the projection surface and the rotation axis, the unit is mm, R 4 is the distance between the circle center of the first arc section and the rotation axis, R 1 is the radius of the connecting column on the projection surface, the unit is mm, R 2 is the radius of the first arc section, the unit is mm, R 3 is the radius of the third arc section, the unit is mm, R 4 is the radius of the fifth arc section, the unit is mm, R 5 is the radius of the sixth arc section, the unit is mm, w 3995 is the distance between the surface of the first plate and the surface of the first plate, the unit is the distance between the two surfaces is 96 mm, and the unit is the distance between the two surfaces is 96 mm.
Further, the bevel gear comprises the following parameters of +. 153.33 DEG, +.O 1OO2＝5.35°;∠O1 OA=3.37 DEG, +.OAB=3.37 DEG, +.BOC=17.9 DEG, +.OCG=154.2 DEG, wherein +.A is an angle between an intersection line of a surface of the connecting body on a section passing through the rotation axis and an intersection line of a surface of the body on the section passing through the rotation axis, O 1OO2 is an angle between a circle center of projection of the connecting column on the projection surface and a perpendicular of the rotation axis and a perpendicular of the first circular arc section, and O 1 OA is an angle between an intersection line of a projection of the connecting column on the projection surface and the rotation axis and a perpendicular of the inner edge of the helical section and a perpendicular of the rotation axis, and an angle between an extension line of the third straight section and an intersection line of a line of the helical section and an intersection line of a line of the second circular arc section and an intersection line of the second circular arc section of the helical section and an intersection line of the second circular arc section and an intersection line of the second circular arc section and an outer edge of the helical section and the rotation axis.
Compared with the prior art, the scheme has the following beneficial effects:
The bevel gear related by the application has the advantages that the web part is composed of the first web, the second web and a plurality of connecting columns, the weight is lighter, the stress and deformation requirements are met, and compared with the web in the prior art, the weight is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments, the following brief description of the drawings is provided, in which:
FIG. 1 is a front view of a helical gear in an embodiment;
FIG. 2 is a rear view of the helical gear in the embodiment;
FIG. 3 is an X-X cross-sectional view of FIG. 1;
FIG. 4 is an enlarged partial view of the portion E of FIG. 3;
FIG. 5 is a Y-Y cross-sectional view of FIG. 3;
FIG. 6 is an enlarged partial view of portion F of FIG. 5;
fig. 7 is a partial enlarged view of the portion P of fig. 2;
part of the main reference numerals illustrate:
Helical gear 1, shaft connection 2, web portion 3, helical tooth portion 4, first web 5, second web 6, connection post 7, transition portion 8, body 9, connection sub-body 10, first hole 11, second hole 12.
Detailed Description
In the claims and in the description, unless otherwise defined, the terms "first," "second," or "third," etc., are used for distinguishing between different objects and not for describing a particular sequential order.
In the claims and the specification, unless otherwise defined, the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of description, and do not imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation.
In the claims and specification, unless otherwise defined, the terms "fixedly coupled" and "fixedly connected" are to be construed broadly as any manner of connection without a displacement relationship or relative rotational relationship therebetween, and that is to say include non-detachably fixedly connected, integrally connected, and fixedly connected by other means or elements.
In the claims and specification, unless otherwise defined, the terms "comprising," having, "and variations thereof mean" including but not limited to.
The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1,2 and 3, as shown in the drawings, the helical gear 1 in this embodiment includes, in order from inside to outside in the radial direction, a shaft connecting portion 2, a web portion 3, a helical tooth portion 4 and a transition portion which are integrally connected to each other. The shaft connecting portion 2 and the helical tooth portion 4 belong to the prior art, and the present application is not improved, so that a description thereof will not be repeated.
The web portion 3 includes a first web 5, a second web 6, and a number of connection posts 7.
The first web 5 and the second web 6 are arranged in the direction of the rotational axis O of the helical gear 1 and the first web 5 is closer to the tooth top surface of the helical gear 4.
As shown in fig. 1, the first web 5 has a circular ring shape, the inner edge of which is connected to the shaft connecting portion 2 and the outer edge of which is connected to the bevel gear portion 4, and as shown in fig. 3 and 4, the first web 5 has two surfaces perpendicular to the rotation axis O of the bevel gear 1.
As shown in fig. 5 and 6, in this embodiment, a plurality of first holes 11 are uniformly distributed in the circumferential direction in the first web 5, and the number of the first holes 11 is the same as the number of the connecting posts 7, and is 12. The first hole 11 penetrates both surfaces of the first web 5 in the rotation axis direction, and opens to the outer edge of the first web 5. Specifically, the projection of the first hole 11 on the projection plane perpendicular to the rotation axis includes a first straight line segment KL, a second straight line segment NM, and a first circular arc segment LM, both of which are connected to the outer edge of the first web 5 and both of which are located on a straight line passing through the projection of the rotation axis on the projection plane, the first circular arc segment LM connecting the first straight line segment KL and the second straight line segment NM.
As shown in fig. 2, 3,4 and 7, the second web 6 includes a body 9 and a connecting body integrally connected, the body 9 has a circular ring shape, an inner edge of which is connected to the shaft connecting portion 2, and an outer edge of which is connected to the connecting body. The body 9 has two surfaces perpendicular to the axis of rotation of the helical gear 1. The connecting body is used for connecting the body 9 and the helical gear 4, and two line segments formed on a section passing through the rotation axis of the helical gear 1 on two surfaces of the connecting body facing away from each other are parallel to each other and are inclined relative to the rotation axis of the helical gear 1.
As shown in fig. 2 and 7, in this embodiment, the connector includes a plurality of connector bodies 10 uniformly distributed circumferentially around the rotation axis of the helical gear 1, and the number of the connector bodies 10 is the same as the number of the connector posts 7 and is 12. The space between the connector sub-bodies 10 forms a second hole 12. The projection of the second hole 12 on the projection surface is composed of a second arc segment DH, a third arc segment HI, a fourth arc segment IB, a third straight line segment BJ and a fifth arc segment JK in order. The second arc section DH is connected to the inner edge of the helical tooth portion 4, the fourth arc section IB is located on the projection of the outer edge of the body 9, and the third arc section HI is connected to the second arc section DH and the fourth arc section IB. The fifth arc section KJ is connected with the inner edge of the bevel gear 1, and the third straight line section JB is connected with the fourth arc section IB and the fifth arc section KJ.
As shown in fig. 3 and 4, the connecting posts 7 extend axially, and the number of each connecting post 7 is 12, which are uniformly distributed around the circumferential direction of the rotation axis of the helical gear 1. The connecting post 7 is for connecting the two surfaces of the first web 5 and the body 9 opposite to each other and is located close to the connecting body.
As shown in fig. 4, the transition 8 is integral with the helical tooth 4 and the first web 5 for connecting the inner edge of the helical tooth 4 and the surface of the first web 5 facing away from the second web 6. The transition 8 has, in a section through the axis of rotation, a sixth circular arc section which is curved in a direction approaching the first web 5.
The technical scheme provides an innovative configuration for a person skilled in the art to design the bevel gear web. This configuration achieves a light weight and is able to meet stress requirements as compared to conventional web structures. As a more specific design instruction, with this configuration, when the number of the connection posts 7 may be 12, the distance between the two surfaces of the first web 5 is greater than the distance between the two surfaces of the body 9 and also greater than the distance between the two surfaces of the connection body, and the area of the second hole 12 on the projection plane is greater than the area of the first hole 11 on the projection plane.
As a more specific design guideline, referring to fig. 4, 6 and 7, in the case that the working condition of the helical gear 1 is that the tangential component of the meshing force received is less than or equal to 81000N, the axial component of the meshing force received is less than or equal to 23000N, the component of the meshing force received is less than or equal to 53000N, and the rotation speed is less than or equal to 323rpm, if the total mass of the helical gear 4 is less than or equal to 20kg, the material yield strength used for the web portion 3 is greater than or equal to 700Mpa and the material density is less than or equal to 7.86g/cm 3, when 113 is less than or equal to R 0 is less than or equal to 120 and 176.85 is less than or equal to R 1 is less than or equal to 201.4, the following parameters of the helical gear 1 are ：R2≥R1-32.055;R3＝1-46.4;R4≥173.585;r1≥8;r2≤15;r3≤7.5;r4≤7.5;r5≥1.7;w0≥51.5;W 3 is greater than or equal to 8, wherein R 0 is the radius of the inner edge of the web part 3, the unit is mm, R 1 is the radius of the outer edge of the web part 3, the unit is mm, R 2 is the radius of the outer edge of the body 9, R 3 is the distance between the center of the projection of the connecting column 7 on the projection surface and the rotation axis, the unit is mm, R 4 is the distance between the center of the first arc section LM and the rotation axis, the unit is mm, R 1 is the radius of the connecting column 7 on the projection surface, the unit is mm, R 2 is the radius of the first arc section LM, the unit is mm, R 3 is the radius of the third arc section HI, the unit is mm, R 4 is the radius of the fifth arc section KJ, the unit is mm, R 5 is the radius of the sixth arc section, the unit is mm, w 0 is the distance between the surface of the first web 5 and the first web 5, the unit is the distance between the two surfaces is 96 mm, and the unit is between the two surfaces of the web 5 is 96 mm.
In particular to the embodiment, the bevel gear 1 adopts 9310 steel with the density of 7.86g/cm 3, the yield strength of the material is greater than or equal to 940Mpa, and the input load is the largest, namely, the tangential component of the meshing force is equal to 81000N, the axial component of the meshing force of the gear teeth is equal to 23000N, the radial component of the meshing force of the gear teeth is equal to 53000N, and the rotating speed is equal to 323rpm. R 0 takes 113mm, R 1 takes 201.4mm, R 2 takes 169.345mm, R 3 takes 155mm, w 1 is 10mm, w 2 is 8mm, and w 3 is 8mm.
Other main parameters of the helical gear 1 in the embodiment include oc= 153.33 °, O 1OO2＝5.35°;∠O1 oa=3.37°, oab=3.37°, boc=17.9°, ocg=154.2 °. The angle O 1OO2 is the angle between the perpendicular line from the center of the projection of the connecting column 7 on the projection plane to the rotation axis and the perpendicular line from the center of the first circular arc section LM to the rotation axis, the angle O 1 OA is the angle between the perpendicular line from the center of the projection of the connecting column 7 on the projection plane to the rotation axis and the perpendicular line from the extension line of the third linear section BJ to the inner edge of the helical tooth part 4 and the perpendicular line of the rotation axis, the angle OAB is the angle between the perpendicular line of the third linear section BJ to the inner edge of the helical tooth part 4 and the perpendicular line of the third linear section BJ, the angle BOC is the angle between the perpendicular line of the third linear section BJ to the outer edge of the body 9 and the perpendicular line of the rotation axis, and the angle between the perpendicular line of the extension line of the second circular arc section DH and the outer edge of the body 9 and the angle OCG is the angle between the perpendicular line of the second linear section BJ and the intersection line of the second linear arc section.
If the web portion 3 of the helical gear 1 used in the same environment is solid, the volume thereof is 4.489×10 6mm3, and the mass thereof is 35.287kg. In this embodiment, the helical gear 1 has a volume of 1.331×10 6mm3 and a mass of 10.458kg, and compared with the known web, the helical gear has a smaller volume, a lighter mass, and a reduced mass of 70.363%, thereby achieving a good light weight effect.
The helical gear 1 is subjected to statics analysis, the mesh division size is 2mm, the number of network units is 1044250, the equivalent stress (von-Mises stress) of the web part 3 is 477.46Mpa to 592.09Mpa, and the stress is far smaller than the material yield strength. Thus, reliable operation can be ensured.
The above description and examples are illustrative of the scope of the application and are not to be construed as limiting the scope of the application.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211433905.9A CN115899215B (en) | 2022-11-16 | 2022-11-16 | Helical gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211433905.9A CN115899215B (en) | 2022-11-16 | 2022-11-16 | Helical gear |
Publications (2)
| Publication Number | Publication Date |
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| CN115899215A CN115899215A (en) | 2023-04-04 |
| CN115899215B true CN115899215B (en) | 2025-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211433905.9A Active CN115899215B (en) | 2022-11-16 | 2022-11-16 | Helical gear |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681444B (en) * | 2022-11-16 | 2025-07-22 | 厦门大学 | Bevel gear web |
| CN115681445B (en) * | 2022-11-16 | 2025-07-22 | 厦门大学 | Gear wheel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204805470U (en) * | 2015-06-04 | 2015-11-25 | 中航商用航空发动机有限责任公司 | Gear |
| CN115681444A (en) * | 2022-11-16 | 2023-02-03 | 厦门大学 | Spoke plate of helical gear |
| CN115681445A (en) * | 2022-11-16 | 2023-02-03 | 厦门大学 | Gear wheel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4173053B2 (en) * | 2003-06-02 | 2008-10-29 | 株式会社エンプラス | Injection molding resin gear, injection molding resin sprocket, injection molding resin pulley, injection molding resin roller |
| FR3096081B1 (en) * | 2019-05-15 | 2021-04-23 | Safran Helicopter Engines | Sail turbomachine shaft pinion comprising a reticulated structure |
| CN212028461U (en) * | 2020-04-16 | 2020-11-27 | 南京高速齿轮制造有限公司 | Helical gear and wind power generation gear box |
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- 2022-11-16 CN CN202211433905.9A patent/CN115899215B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204805470U (en) * | 2015-06-04 | 2015-11-25 | 中航商用航空发动机有限责任公司 | Gear |
| CN115681444A (en) * | 2022-11-16 | 2023-02-03 | 厦门大学 | Spoke plate of helical gear |
| CN115681445A (en) * | 2022-11-16 | 2023-02-03 | 厦门大学 | Gear wheel |
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| CN115899215A (en) | 2023-04-04 |
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