CN215794527U - Coaxial contra-rotating double-rotor-wing shafting bearing test mounting structure - Google Patents
Coaxial contra-rotating double-rotor-wing shafting bearing test mounting structure Download PDFInfo
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- CN215794527U CN215794527U CN202122046214.0U CN202122046214U CN215794527U CN 215794527 U CN215794527 U CN 215794527U CN 202122046214 U CN202122046214 U CN 202122046214U CN 215794527 U CN215794527 U CN 215794527U
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Abstract
The utility model provides a coaxial contra-rotating double-rotor shafting bearing test installation structure, which comprises: a hollow outer rotor shaft; the inner rotor shaft is rotatably arranged inside the hollow outer rotor shaft; the lower end of the hollow outer rotor shaft is in transmission connection with the power unit; the lower end of the inner rotor shaft is in transmission connection with the power unit; the lower end of the hollow outer rotor shaft is sequentially provided with a first test bearing and a second test bearing from bottom to top; the lower end of the inner rotor shaft is rotatably connected with the hollow outer rotor shaft through a fourth test bearing; the power unit drives the inner rotor shaft and the hollow outer rotor shaft to rotate, the bearing groups to be tested are installed on the inner rotor shaft and the hollow outer rotor shaft in a matched mode, the bearing groups to be tested are tested synchronously, meanwhile, the stress state of the test bearing is consistent with the stress state of the bearing in actual use by means of the structure, and accuracy of bearing test data is improved.
Description
Technical Field
The utility model relates to the technical field of bearing tests, in particular to a coaxial contra-rotating double-rotor-wing shafting bearing test installation structure.
Background
The coaxial dual-rotor helicopter is characterized in that the coaxial dual-rotor helicopter is provided with an upper rotor and a lower rotor which rotate around the same theoretical axis in a positive and negative direction, because the directions of rotation are opposite, the torques generated by the two rotors are mutually balanced under the flight state with unchanged course, the course control can be realized by generating unbalanced torque through the total distance differential of the upper rotor and the lower rotor, and the coaxial dual-rotor helicopter is not only a lifting surface but also a control surface in the longitudinal direction, the transverse direction and the course in the flight of the helicopter.
Chinese patent CN201910742384.7 discloses a test device for driving a coaxial rotor hub model to contra-rotate, which sequentially comprises a first transmission shaft, a fixed shaft and a second transmission shaft which are coaxially nested with each other from inside to outside, wherein one end of the first transmission shaft is fixedly provided with a first driven wheel, one end of the second transmission shaft is fixedly provided with a second driven wheel, and the driving shaft is fixedly provided with a first driving wheel meshed with the first driven wheel and a second driven wheel meshed with the second driven wheel; the inner shaft, the outer shaft and the support shaft are nested, the gears for driving the inner shaft and the outer shaft are arranged on the same drive shaft, and the small bevel gear for driving the inner shaft and the large bevel gear for driving the outer shaft are arranged in a face-to-face manner, so that the upper rotor wing and the lower rotor wing can rotate reversely; the utility model realizes the contra-rotating support of the coaxial rotors by adopting a simple structure, has simple structural principle, can truly simulate the performance parameters of the dual-rotor helicopter, and can complete the measurement of test parameters in the wind tunnel.
However, the technical scheme adopts bevel gear transmission, so that the problem of multi-stage speed reduction is caused, a loading device is not provided, and the bearing test cannot be completed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a coaxial contra-rotating double-rotor shafting bearing test installation structure.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a coaxial pair of rotor shafting bearing test mounting structure that counter-rotates which characterized in that includes:
a hollow outer rotor shaft;
the inner rotor shaft is rotatably arranged inside the hollow outer rotor shaft; and
the lower end of the hollow outer rotor shaft is in transmission connection with the power unit; the lower end of the inner rotor shaft is in transmission connection with the power unit;
the lower end of the hollow outer rotor shaft is sequentially provided with a first test bearing and a second test bearing from bottom to top; the lower end of the inner rotor shaft is rotatably connected with the hollow outer rotor shaft through a fourth test bearing.
As a modification, the mounting positions of the second test bearing and the fourth test bearing are located in the same horizontal plane.
As an improvement, the power unit includes:
a first driving section;
the first driving gear is sleeved at the lower end of the hollow outer rotor shaft and is in meshing transmission with the first driving part;
a second driving section; and
and the second driving gear is sleeved at the lower end of the inner rotor shaft and is in meshed transmission with the second driving part.
As an improvement, the power unit further comprises:
and the first thrust bearing is arranged between the first driving gear and the second driving gear and is connected with the first driving gear and the second driving gear.
As an improvement, the method also comprises
An upper transition assembly; and
a lower transition assembly;
the upper end of the hollow outer rotor shaft is rotationally connected with the upper transition assembly;
the upper end of the inner rotor shaft is rotatably connected with the upper transition assembly through a third test bearing.
As an improvement, the upper transition assembly comprises:
an upper transition seat;
the bearing block is connected with the upper transition seat; and
the connecting seat, the external diameter face of connecting seat through accompany the examination bearing with the bearing frame rotates and is connected, the upper end of connecting seat internal diameter face with the outer lane of third experimental bearing is connected, the lower extreme of connecting seat internal diameter face with the upper end external diameter face of hollow outer rotor axle is connected.
As an improvement, the lower transition assembly comprises:
a lower transition seat; and
the outer rotor supporting seat, the outer diameter face of outer rotor supporting seat with the transition seat is connected down, the upper end of outer rotor supporting seat inner diameter face is connected with the outer lane of first experimental bearing, the lower extreme of outer rotor supporting seat inner diameter face is connected with the outer lane of the experimental bearing of second.
As an improvement, the power unit synchronously drives the hollow outer rotor shaft and the hollow inner rotor shaft to rotate.
As an improvement, the hollow outer rotor shaft and the inner rotor shaft are arranged in the opposite rotating direction.
As an improvement, the inner rotor shaft is a hollow shaft.
The utility model has the beneficial effects that:
(1) the power unit simultaneously drives the inner rotor shaft and the hollow outer rotor shaft to rotate, and synchronous parameter tests are carried out on the first test bearing, the second test bearing, the third test bearing and the fourth test bearing, wherein the inner rings and the outer rings of the third test bearing and the fourth test bearing rotate;
(2) the bearing testing device utilizes the structure to ensure that the stress state of the tested bearing is consistent with the actual use stress state of the bearing, thereby improving the accuracy of the bearing testing data;
(3) according to the utility model, the driving gear is connected with the rotor shaft through the integrated spline, so that the transmission stability of the rotor shaft is improved, and the test precision and the test data accuracy are improved;
in conclusion, the utility model has the advantages of high test precision, comprehensive test data, capability of simulating parameters under real working conditions and the like.
Drawings
FIG. 1 is a cross-sectional view of the overall construction of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B in accordance with the present invention;
FIG. 5 is a schematic view of the hollow outer rotor shaft according to the present invention;
FIG. 6 is a schematic view of an inner rotor shaft according to the present invention;
fig. 7 is a schematic structural diagram of a first driving gear according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
As shown in fig. 1-2, a coaxial contra-rotating dual-rotor shafting bearing test mounting structure comprises: a shell 1 which is arranged in a hollow way,
a hollow outer rotor shaft 4; the hollow outer rotor shaft 4 is arranged in the shell 1,
the inner rotor shaft 5 is rotatably arranged inside the hollow outer rotor shaft 4; and
the lower end of the hollow outer rotor shaft 4 is in transmission connection with the power unit 6; the lower end of the inner rotor shaft 5 is in transmission connection with the power unit 6; the power unit 6 is connected with the lower part of the shell 1;
the lower end of the hollow outer rotor shaft 4 is sequentially provided with a first test bearing 100 and a second test bearing 200 from bottom to top; the lower end of the inner rotor shaft 5 is rotatably connected with the hollow outer rotor shaft 4 through a fourth test bearing 400;
in the present embodiment, the power unit 6 drives the inner rotor shaft 5 and the hollow outer rotor shaft 4 to rotate, and the synchronous parameter test is performed on the first test bearing 100, the second test bearing 200, the third test bearing 300, and the fourth test bearing 400, where both the inner ring and the outer ring of the third test bearing 300 and the fourth test bearing 400 are subjected to the rotation test.
Preferably, the mounting positions of the second test bearing 200 and the fourth test bearing 400 are located in the same horizontal plane; not only improves the stability of the equipment and enables the collection of test data to be more accurate, but also prolongs the service life of the hollow outer rotor shaft 4 and the hollow inner rotor shaft 5.
As a modification, as shown in fig. 2, the power unit 6 includes:
a first drive section 61;
the first driving gear 62 is sleeved at the lower end of the hollow outer rotor shaft 4, and is in meshing transmission with the first driving part 61;
a second driving section 63; and
and the second driving gear 64 is sleeved at the lower end of the inner rotor shaft 5, and is in meshing transmission with the second driving part 63.
It should be noted that, the first driving part 61 and the second driving part 63 adopt a mode that the variable plunger motor 611 drives the cylindrical gear to transmit, so as to improve the stability of the operation process;
as shown in fig. 5 to 7, the inner diameter of the first driving gear 62 is connected with the outer diameter of the hollow outer rotor shaft 4 through a spline, so as to improve the stability of the hollow outer rotor shaft 4 during the operation process;
the inner diameter of the second driving gear 64 is connected with the outer diameter of the inner rotor shaft 5 through a spline, so that the stability of the inner rotor shaft 5 in the operation process is improved.
Preferably, as shown in fig. 4, the power unit 6 further includes:
and a first thrust bearing 65, wherein the first thrust bearing 65 is arranged between the first driving gear 62 and the second driving gear 64 and is used for connecting the first driving gear 62 and the second driving gear 64.
In the embodiment, the device further comprises an upper transition component 2; and a lower transition assembly 3;
the upper end of the hollow outer rotor shaft 4 is rotationally connected with the upper transition component 2;
the upper end of the inner rotor shaft 5 is rotatably connected with the upper transition assembly 2 through a third test bearing 300.
Preferably, as shown in fig. 3, the upper transition assembly 2 includes:
an upper transition seat 21;
the bearing seat 22 is connected with the upper transition seat 21; and
the outer diameter surface of the connecting seat 23 is rotatably connected with the bearing seat 22 through an accompanying bearing 500, the upper end of the inner diameter surface of the connecting seat 23 is connected with the outer ring of the third test bearing 300, and the lower end of the inner diameter surface of the connecting seat 23 is connected with the outer diameter surface of the upper end of the hollow outer rotor shaft 4;
it should be noted that, a step a211 is arranged on an inner diameter surface of the upper transition seat 21, and an outer diameter of the bearing seat 22 is matched with the step a211 for positioning and mounting the bearing seat 22;
the inner diameter surface of the bearing seat 22 is provided with a step b221 for mounting the test-accompanying bearing 500; the test-accompanying bearing 500 is arranged in the step b221 through a bearing end cover b;
the outer diameter of the connecting seat 23 is provided with a step c231, and the step c231 is matched with the inner ring of the test-accompanying bearing 500, so that the connecting seat 23 is rotatably connected to the bearing seat 22.
Further, as shown in fig. 4, the lower transition assembly 3 includes:
a lower transition seat 31; and
the outer rotor wing supporting seat 32, the outer diameter surface of the outer rotor wing supporting seat 32 is connected with the lower transition seat 31, the upper end of the inner diameter surface of the outer rotor wing supporting seat 32 is connected with the outer ring of the first test bearing 100, and the lower end of the inner diameter surface of the outer rotor wing supporting seat 32 is connected with the outer ring of the second test bearing 200;
it should be noted that, the outer diameter surface of the outer rotor support seat 32 is provided with a step d321 in positioning fit with the lower transition seat 31, and the upper end and the lower end of the inner diameter surface are respectively provided with an installation position corresponding to the test bearing.
Preferably, the power unit 6 drives the hollow outer rotor shaft 4 and the inner rotor shaft 5 to rotate synchronously.
Preferably, the hollow outer rotor shaft 4 is arranged opposite to the rotation direction of the inner rotor shaft 5.
Preferably, the inner rotor shaft 5 is a hollow shaft
The hollow outer rotor shaft 4 and the hollow inner rotor shaft 5 are driven to rotate in opposite directions by synchronous driving, so that the rotating speed of the test bearing is increased, and the power input of the power unit 6 is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a coaxial pair of rotor shafting bearing test mounting structure that counter-rotates which characterized in that includes:
a hollow outer rotor shaft (4);
the inner rotor shaft (5) is rotatably arranged inside the hollow outer rotor shaft (4); and
the lower end of the hollow outer rotor shaft (4) is in transmission connection with the power unit (6); the lower end of the inner rotor shaft (5) is in transmission connection with the power unit (6);
the lower end of the hollow outer rotor shaft (4) is sequentially provided with a first test bearing (100) and a second test bearing (200) from bottom to top; the lower end of the inner rotor shaft (5) is rotatably connected with the hollow outer rotor shaft (4) through a fourth test bearing (400).
2. A coaxial contra-rotating twin rotor shafting bearing test mounting structure according to claim 1, wherein the mounting positions of said second test bearing (200) and said fourth test bearing (400) are located in the same horizontal plane.
3. A coaxial contra-rotating twin rotor shafting bearing test mounting structure according to claim 1, wherein said power unit (6) comprises:
a first drive unit (61);
the first driving gear (62) is sleeved at the lower end of the hollow outer rotor shaft (4) and is in meshed transmission with the first driving part (61);
a second drive unit (63); and
and the second driving gear (64) is sleeved at the lower end of the inner rotor shaft (5) and is in meshed transmission with the second driving part (63).
4. A coaxial contra-rotating twin rotor shafting bearing test mounting structure according to claim 3, wherein said power unit (6) further comprises:
and the first thrust bearing (65), wherein the first thrust bearing (65) is arranged between the first driving gear (62) and the second driving gear (64) and is used for connecting the first driving gear (62) and the second driving gear (64).
5. The coaxial contra-rotating dual-rotor shafting bearing test installation structure according to claim 1, further comprising
An upper transition assembly (2); and
a lower transition assembly (3);
the upper end of the hollow outer rotor shaft (4) is rotatably connected with the upper transition component (2);
the upper end of the inner rotor shaft (5) is rotatably connected with the upper transition assembly (2) through a third test bearing (300).
6. A coaxial contra-rotating twin rotor shafting bearing test mounting structure according to claim 5, wherein said upper transition assembly (2) comprises:
an upper transition seat (21);
the bearing seat (22), the bearing seat (22) is connected with the upper transition seat (21); and
connecting seat (23), the external diameter face of connecting seat (23) through accompany examination bearing (500) with bearing frame (22) rotate and are connected, the upper end of connecting seat (23) internal diameter face with the outer lane of third test bearing (300) is connected, the lower extreme of connecting seat (23) internal diameter face with the upper end external diameter face of hollow outer rotor shaft (4) is connected.
7. A coaxial contra-rotating twin rotor shafting bearing test mounting structure according to claim 6, wherein said lower transition assembly (3) comprises:
a lower transition seat (31); and
outer rotor supporting seat (32), the outer diametral plane of outer rotor supporting seat (32) with transition seat (31) are connected down, the upper end of outer rotor supporting seat (32) inner diametral plane is connected with the outer lane of first experimental bearing (100), the lower extreme of outer rotor supporting seat (32) inner diametral plane is connected with the outer lane of second experimental bearing (200).
8. A coaxial contra-rotating dual rotor shafting bearing test mounting structure according to claim 1, wherein said power unit (6) synchronously drives said hollow outer rotor shaft (4) and said inner rotor shaft (5) to rotate.
9. A coaxial contra-rotating dual rotor shafting bearing test mounting structure according to claim 1, wherein the hollow outer rotor shaft (4) and the inner rotor shaft (5) are arranged with their directions of rotation reversed.
10. A coaxial contra-rotating dual rotor shafting bearing test mounting structure according to claim 1, wherein said inner rotor shaft (5) is a hollow shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122046214.0U CN215794527U (en) | 2021-08-27 | 2021-08-27 | Coaxial contra-rotating double-rotor-wing shafting bearing test mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122046214.0U CN215794527U (en) | 2021-08-27 | 2021-08-27 | Coaxial contra-rotating double-rotor-wing shafting bearing test mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215794527U true CN215794527U (en) | 2022-02-11 |
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ID=80152490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122046214.0U Active CN215794527U (en) | 2021-08-27 | 2021-08-27 | Coaxial contra-rotating double-rotor-wing shafting bearing test mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215794527U (en) |
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2021
- 2021-08-27 CN CN202122046214.0U patent/CN215794527U/en active Active
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