CN216433522U - Eccentric load loading device of pivot - Google Patents
Eccentric load loading device of pivot Download PDFInfo
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- CN216433522U CN216433522U CN202123261862.4U CN202123261862U CN216433522U CN 216433522 U CN216433522 U CN 216433522U CN 202123261862 U CN202123261862 U CN 202123261862U CN 216433522 U CN216433522 U CN 216433522U
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- 238000011068 loading method Methods 0.000 title claims abstract description 85
- 238000012360 testing method Methods 0.000 claims description 8
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- 238000005859 coupling reaction Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The utility model discloses a rotating shaft eccentric load loading device, which comprises a supporting piece, a driving piece, a loading piece and a base, wherein the base supports and connects the supporting piece, the driving piece and the loading piece, the supporting piece comprises at least two groups of bearings which are rotatablely connected with a rotating shaft to be tested, the driving piece is connected with the rotating shaft and drives the rotating shaft to rotate, and the loading piece is at least one electromagnetic loading structure which is arranged along the radial direction of the rotating shaft; the base is provided with a sliding groove which is axially arranged along the rotating shaft, and the bottom parts of the supporting piece and the loading piece are slidably arranged in the sliding groove. The utility model discloses an eccentric load loading device of pivot has simple structure, application of force direction fixed, effectively imitates time-varying eccentric load and can acquire advantages such as accurate vibration characteristic.
Description
Technical Field
The utility model relates to a wind turbine generator system performance test equipment technical field especially relates to a pivot eccentric load loading device.
Background
In recent years, the wind power industry in China is rapidly developed and becomes the world wind power large country. The abnormal phenomenon of unit shafting vibration often appears in the wind turbine generator system in the operation process, and then lead to the fan to shut down and overhaul slightly, then lead to the abnormal damage of fan key spare part seriously, have seriously influenced wind power industry's development. Finding out the vibration mechanism and characteristics of a shafting of the wind turbine generator and improving the safe and stable operation performance of the wind turbine generator becomes a technical bottleneck which is urgently needed to be solved in the wind power industry in China.
The wind turbine generator is large in size and complex in working site environment, and the research on the vibration characteristics of the shafting of the wind turbine generator is not suitable for being developed on the site of a wind power plant. The existing method is to develop a wind turbine shafting vibration performance test device in a laboratory so as to develop related researches. The existing research shows that the abnormal vibration of the shafting of the wind turbine is mostly generated by eccentric load. The existing method for applying the eccentric load of the shafting vibration test bed of the wind turbine generator system is generally to install an eccentric mass block on a shaft, and the method is characterized in that: the mounting position of the eccentric mass block needs to be designed on the shaft; the magnitude of the eccentric load is related to the rotating speed of the shaft, and the eccentric load is difficult to accurately control in the test process; the direction of the eccentric load changes in real time along with the rotation angle of the shaft, and the eccentric load in a constant direction cannot be applied in the rotation process of the shaft; the magnitude of the eccentric load can not be adjusted in real time in the constant-speed rotation working process of the shaft, and the time-varying eccentric load can not be simulated.
In practice, however, when the shafting of the wind turbine generator generates an eccentric load, the size of the shafting of the wind turbine generator has a time-varying characteristic, and the direction of the shafting of the wind turbine generator is often fixed. Therefore, the existing loading method adopting the eccentric mass block is difficult to simulate the actual working condition, is not beneficial to accurately obtaining the vibration characteristic of the shafting, and is difficult to be used for developing the vibration characteristic research of the shafting of the wind turbine generator.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure, application of force direction fixed, effective simulation time-varying eccentric load and can acquire the eccentric load loading device of pivot of accurate vibration characteristic.
In order to solve the technical problem, the utility model provides a technical scheme does:
a rotating shaft eccentric load loading device comprises a supporting piece, a driving piece, a loading piece and a base, wherein the base supports and is connected with the supporting piece, the driving piece and the loading piece, the supporting piece comprises at least two groups of bearings which are rotatably connected with a rotating shaft to be tested, the driving piece is connected with the rotating shaft and drives the rotating shaft to rotate, and the loading piece is at least one electromagnetic loading structure which is arranged along the radial direction of the rotating shaft; the base is provided with a sliding groove which is axially arranged along the rotating shaft, and the bottom parts of the supporting piece and the loading piece are arranged in the sliding groove in a sliding manner.
As a further improvement of the technical scheme:
the bearings are uniformly arranged along the axial direction of the rotating shaft.
The driving piece is connected with the rotating shaft through a coupling.
The electromagnetic loading structure of the loading piece comprises an electromagnet and a power supply, and the power supply supplies power to the electromagnet.
The distance between the output end surface of the loading part and the surface of the rotating shaft is 2-5 mm.
The loading piece comprises a shielding cover, the shielding cover is covered outside the output end of the loading piece, and an opening is formed in the end face, facing the rotating shaft, of the shielding cover.
The rotating shaft eccentric load loading device further comprises a controller used for controlling the voltage output by the power supply to the electromagnet, and the controller is electrically connected with the power supply.
The rotating shaft eccentric load loading device further comprises a controller used for controlling the rotating speed of the output shaft of the driving piece, and the controller is electrically connected with the driving piece.
The sliding groove is a dovetail groove, and the bottoms of the supporting piece and the loading piece are of T-shaped structures matched with the cross section of the sliding groove.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses an eccentric load loading device of pivot, its support piece include at least two sets of bearings for hold in the palm and hold the pivot, guarantee the position stability of pivot gyration in-process, and can not interfere the pivot gyration. The driving piece is connected with the rotating shaft and provides power for the rotation of the rotating shaft in the test process. The loading piece is at least one electromagnetic loading structure arranged along the radial direction of the rotating shaft, and the electromagnetic loading structure can apply eccentric load to the rotating shaft along the radial direction under the condition of not contacting the rotating shaft. The structure does not interfere normal rotation of the rotating shaft, and meanwhile, the eccentric load is applied in the fixed direction, so that the eccentric load can be effectively simulated, the accuracy of a test result is improved, the size and the direction of the applied eccentric load can be accurately controlled through the electromagnetic loading structure, and multi-point eccentric loading can be realized by installing the electromagnetic loading structure at multiple points.
The loading device is characterized in that a sliding groove which is arranged along the axial direction of the rotating shaft is formed in the base, and the bottoms of the supporting piece and the loading piece are arranged in the sliding groove in a sliding mode, so that the supporting point of the supporting piece and the loading point of the loading piece can move along the axial direction of the rotating shaft, the supporting stress position and the eccentric load stress position of the rotating shaft can be conveniently adjusted, the test situation is further enriched through a simple arrangement structure, and the more extensive stress condition of the rotating shaft can be simulated.
Drawings
Fig. 1 and fig. 2 are schematic views of the eccentric load loading device of the rotating shaft of the present invention;
fig. 3 is a schematic cross-sectional view of the eccentric load loading device of the rotating shaft according to the present invention.
Illustration of the drawings: 1. a support member; 11. a bearing; 2. a drive member; 3. a loading member; 31. a shield case; 4. a base; 41. a chute; 5. a rotating shaft; 6. a coupling is provided.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Example (b):
as shown in fig. 1 and fig. 3, the rotating shaft eccentric load loading device of the present embodiment includes a supporting member 1, a driving member 2, a loading member 3, and a base 4, where the base 4 supports and connects the supporting member 1, the driving member 2, and the loading member 3, the supporting member 1 includes at least two sets of bearings 11 rotatably connected to a rotating shaft 5 to be tested, the driving member 2 is connected to and drives the rotating shaft 5 to rotate, and the loading member 3 is at least one electromagnetic loading structure arranged along a radial direction of the rotating shaft 5; the electromagnetic loading structure can apply an eccentric load to the rotating shaft 5 in the radial direction without contacting the rotating shaft 5. The arrangement structure can not interfere the normal rotation of the rotating shaft 5, and meanwhile, an eccentric load is applied in a fixed direction, so that the eccentric load can be effectively simulated, the accuracy of a test result is improved, the size and the direction of the applied eccentric load can be accurately controlled through the electromagnetic loading structure, and the multipoint eccentric loading can be realized by installing the electromagnetic loading structure at multiple points, as shown in fig. 2.
This loading device is equipped with still on base 4 along the 5 axial chutes 41 of arranging of pivot, and the bottom cunning of support piece 1 and loading piece 3 is located in chute 41, therefore support piece 1's strong point and loading piece 3's strong point can be along 5 axial displacement of pivot, conveniently adjusts the support stress position and the eccentric load stress position of pivot 5, has further enriched experimental situation through simple structure that sets up, can simulate more extensive pivot stress condition. The loading device can also arrange the bottom of the driving element 2 to be a structure which is arranged in the sliding groove 41 in a sliding way.
In this embodiment, the sets of bearings 11 are uniformly arranged along the axial direction of the rotating shaft 5 to provide uniform and stable supporting force for the rotating shaft 5.
In this embodiment, the driving member 2 and the rotating shaft 5 are connected through a coupling 6, and the coupling 6 realizes the separable connection of the two, thereby facilitating the arrangement and disassembly of the testing device.
In this embodiment, the electromagnetic loading structure of the loading member 3 includes an electromagnet and a power supply, the power supply supplies power to the electromagnet, an electromagnetic coil of the electromagnet generates magnetic force when receiving power, and an axis of the coil coincides with a radial direction of the rotating shaft 5, so that the coil applies an eccentric load along the radial direction of the rotating shaft 5.
In this embodiment, as shown in fig. 3, the distance between the output end surface of the loading member 3 and the surface of the rotating shaft 5 is 2mm to 5mm, and this distance prevents the gap between the loading member 3 and the rotating shaft 5 from being too large, which leads to the problem of insufficient eccentric load, and also prevents the gap from being too small, which leads to the direct adsorption of the two.
In this embodiment, as shown in fig. 1 and fig. 2, the loading element 3 includes a shielding cover 31, the shielding cover 31 covers the output end of the loading element 3, an opening is formed in the end surface facing the rotating shaft 5, the shielding cover surrounding the output end can effectively reduce the outward magnetic flux leakage of the output end, so as to improve the loading force facing the rotating shaft 5, and the shielding cover 31 may be made of ferromagnetic material with high magnetic permeability.
In this embodiment, the device for loading the eccentric load of the rotating shaft further comprises a controller for controlling the voltage output by the power supply to the electromagnet, the controller is electrically connected with the power supply, and the magnetic force of the electromagnet can be effectively regulated and controlled by adjusting the output voltage of the power supply, so that the size of the eccentric load can be adjusted according to the required time-varying characteristic.
The change rule of the magnetic force F of the electromagnet and the output voltage U of the power supply is as follows:
wherein: f is electromagnetic force (N); mu.s0Is magnetic permeability (4 pi x 10)-7Henry/meter); s0Is the air gap area (mm)2) (ii) a d is the diameter (mm) of the enameled wire; u is a voltage (V); ρ is the resistivity of copper (0.0178. omega. mm)2M); d2 is the outer diameter (mm) of the winding; d1 is the inner diameter (mm) of the winding; δ is the air gap length (mm).
In this embodiment, the controller is electrically connected to the driving member 2 and is further configured to control the rotation speed of the output shaft of the driving member 2. The controller of this embodiment may adopt two control devices that individually control the rotation speed and individually control the output voltage of the power supply, or may adopt the same control device that integrates these two control functions, and such control functions are functions that can be realized by a conventional controller, so that the conventional controller may be selected, and details are not described here.
In this embodiment, the sliding groove 41 is a dovetail groove, and the bottom portions of the supporting member 1 and the loading member 3 are T-shaped structures adapted to the cross section of the sliding groove 41, which can prevent the supporting member 1 and the loading member 3 from directly coming out of the notch of the sliding groove 41.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. For those skilled in the art, the modifications and changes obtained without departing from the technical idea of the present invention should be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a pivot eccentric load loading device which characterized in that: the test device comprises a supporting piece (1), a driving piece (2), a loading piece (3) and a base (4), wherein the base (4) supports and is connected with the supporting piece (1), the driving piece (2) and the loading piece (3), the supporting piece (1) comprises at least two groups of bearings (11) which can be rotatably connected with a rotating shaft (5) to be tested, the driving piece (2) is connected with the rotating shaft (5) and drives the rotating shaft to rotate, and the loading piece (3) is at least one electromagnetic loading structure which is arranged along the radial direction of the rotating shaft (5); the base (4) is provided with a sliding groove (41) which is axially arranged along the rotating shaft (5), and the bottoms of the supporting piece (1) and the loading piece (3) are slidably arranged in the sliding groove (41).
2. The eccentric load loading device of rotating shaft according to claim 1, characterized in that: the bearings (11) are uniformly arranged along the axial direction of the rotating shaft (5).
3. The eccentric load loading device of rotating shaft according to claim 1, characterized in that: the driving piece (2) is connected with the rotating shaft (5) through a coupler (6).
4. The eccentric load loading device of rotating shaft according to claim 1, characterized in that: the electromagnetic loading structure of the loading piece (3) comprises an electromagnet and a power supply, and the power supply supplies power to the electromagnet.
5. The eccentric load loading device of rotating shaft according to claim 1 or 4, characterized in that: the distance between the output end surface of the loading part (3) and the surface of the rotating shaft (5) is 2-5 mm.
6. The eccentric load loading device of rotating shaft according to claim 5, characterized in that: the loading piece (3) comprises a shielding cover (31), the shielding cover (31) covers the output end of the loading piece (3), and an opening is formed in the end face, facing the rotating shaft (5), of the shielding cover.
7. The eccentric load loading device of rotating shaft according to claim 4, characterized in that: the rotating shaft eccentric load loading device further comprises a controller used for controlling the voltage output by the power supply to the electromagnet, and the controller is electrically connected with the power supply.
8. The eccentric load loading device of rotating shaft according to claim 1, wherein: the rotating shaft eccentric load loading device further comprises a controller used for controlling the rotating speed of an output shaft of the driving piece (2), and the controller is electrically connected with the driving piece (2).
9. The eccentric load loading device of rotating shaft according to claim 1, wherein: the sliding groove (41) is a dovetail groove, and the bottoms of the supporting piece (1) and the loading piece (3) are of T-shaped structures matched with the section of the sliding groove (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123261862.4U CN216433522U (en) | 2021-12-23 | 2021-12-23 | Eccentric load loading device of pivot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123261862.4U CN216433522U (en) | 2021-12-23 | 2021-12-23 | Eccentric load loading device of pivot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216433522U true CN216433522U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123261862.4U Active CN216433522U (en) | 2021-12-23 | 2021-12-23 | Eccentric load loading device of pivot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216433522U (en) |
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2021
- 2021-12-23 CN CN202123261862.4U patent/CN216433522U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yiyang Aiyi Information Technology Co.,Ltd. Assignor: HUNAN INSTITUTE OF ENGINEERING Contract record no.: X2023980050675 Denomination of utility model: A device for loading eccentric loads on rotating shafts Granted publication date: 20220503 License type: Common License Record date: 20231213 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yiyang Chuangxing Technology Co.,Ltd. Assignor: HUNAN INSTITUTE OF ENGINEERING Contract record no.: X2023980052753 Denomination of utility model: A device for loading eccentric loads on rotating shafts Granted publication date: 20220503 License type: Common License Record date: 20231219 |