CN219061901U - Main shaft structure of wind generating set - Google Patents
Main shaft structure of wind generating set Download PDFInfo
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- CN219061901U CN219061901U CN202223286493.9U CN202223286493U CN219061901U CN 219061901 U CN219061901 U CN 219061901U CN 202223286493 U CN202223286493 U CN 202223286493U CN 219061901 U CN219061901 U CN 219061901U
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- main shaft
- elliptical arc
- arc section
- shaft shoulder
- shoulder
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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
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a main shaft structure of a wind generating set, which comprises a main shaft head, a main shaft shoulder and a main shaft body which are sequentially connected; the main shaft shoulder is connected with the main shaft body in an elliptical arc transitional manner, an inward concave structure is formed on the end face, facing the main shaft body, of the main shaft shoulder, the inward concave structure comprises a first circular arc section and a second elliptical arc section which are connected with each other, the second elliptical arc section coincides with the elliptical arc, and the long axis of the elliptical arc is enlarged through the second elliptical arc section, so that the joint of the main shaft shoulder and the main shaft body is in smooth transition. Under the condition that the wall thickness of the main shaft is equal, the stress concentration of the transition position of the shaft shoulder can be effectively reduced, and the stress level of the transition position is reduced, so that the weight of the main shaft is reduced, the material cost is reduced, and the aim of reducing the cost is fulfilled.
Description
Technical Field
The utility model relates to the technical field of wind generating sets, in particular to a main shaft structure of a wind generating set.
Background
The main shaft of the wind generating set is used for supporting and transmitting the rotation speed and torque of the wind wheel to the gear box and transmitting bending moment to the main bearing, and is a part for mainly transmitting load of the wind generating set, and the structure of the main shaft is shown in figure 1. The transition arc of the spindle shoulder 01 is generally directly transited by adopting an elliptical arc 02. Because the sectional dimension is suddenly changed, the arc position is a high stress area under the action of external load, and the risk of fatigue fracture is faced in the whole life cycle of the fan. To reduce the stress of the arc position, the traditional mode is to increase the wall thickness of the main shaft and increase the bending modulus, but the outer diameter of the main shaft can not be changed due to the limitation of the inner diameter of the main bearing, and only the inner diameter of the main shaft can be reduced, so that the weight of the main shaft can be obviously increased and the material cost can be increased.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a main shaft structure of a wind generating set, which can effectively reduce stress concentration at a shaft shoulder transition position and reduce the stress level at the transition position under the condition that the main shaft has the same wall thickness, so that the weight of the main shaft is reduced, the material cost is reduced, and the aim of reducing the cost is fulfilled.
The aim of the utility model can be achieved by adopting the following technical scheme:
a main shaft structure of a wind generating set comprises a main shaft head, a main shaft shoulder and a main shaft body which are sequentially connected; the main shaft shoulder is connected with the main shaft body in an elliptical arc transitional manner, an inward concave structure is formed on the end face, facing the main shaft body, of the main shaft shoulder, the inward concave structure comprises a first circular arc section and a second elliptical arc section which are connected with each other, the second elliptical arc section coincides with the elliptical arc, and the long axis of the elliptical arc is enlarged through the second elliptical arc section, so that the joint of the main shaft shoulder and the main shaft body is in smooth transition.
Further, the first circular arc section and the end face of the spindle shaft shoulder adopt circular angle transition.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
according to the utility model, the concave structure is added at the shaft shoulder position, the long axis of the elliptical arc is increased, and under the condition that the wall thickness of the main shaft is equal, the stress concentration at the transition position of the shaft shoulder can be effectively reduced, and the stress level at the transition position is reduced, so that the weight of the main shaft is reduced, the material cost is reduced, and the aim of reducing the cost is fulfilled.
Drawings
Fig. 1 is a schematic structural diagram of a conventional spindle.
Fig. 2 is a schematic perspective view of a spindle according to the present utility model.
Fig. 3 is a cross-sectional view of the spindle of the present utility model.
Fig. 4 is a partial enlarged view at a in fig. 3.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.
As shown in fig. 2 to 4, this embodiment provides a main shaft structure of a wind generating set, including a main shaft head 1, a main shaft shoulder 2 and a main shaft body 3 which are sequentially connected, an elliptical arc 4 transitional connection is adopted between the main shaft shoulder 2 and the main shaft body 3, and a concave structure 5 is formed on the end face of the main shaft shoulder 2 facing the main shaft body 3, the concave structure 5 includes a first circular arc segment 501 and a second circular arc segment 502 which are mutually connected, the second circular arc segment 502 coincides with the elliptical arc 4, and the long axis of the elliptical arc 4 is enlarged through the second circular arc segment 502, so that the joint of the main shaft shoulder 2 and the main shaft body 3 is in gentle transition.
Further, a rounded transition is adopted between the first circular arc section 501 and the end face of the spindle shoulder 2.
The manufacturing process of the main shaft structure of the embodiment is as follows: firstly, a main shaft blank is cast according to the manufacturing implementation mode of the existing main shaft, and then a concave structure is formed through machining.
According to the comparison analysis of the ultimate stress and the fatigue damage of the existing main shaft and the main shaft structure, the ultimate stress of the main shaft structure can be reduced by about 5% and the fatigue damage can be reduced by about 44% under the same load level, and the ultimate and fatigue safety of the main shaft can be effectively improved.
The above description is only of the preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive conception of the present utility model equally within the scope of the disclosure of the present utility model.
Claims (2)
1. A main shaft structure of a wind generating set comprises a main shaft head, a main shaft shoulder and a main shaft body which are sequentially connected; the method is characterized in that: the main shaft shoulder is connected with the main shaft body in an elliptical arc transitional manner, an inward concave structure is formed on the end face, facing the main shaft body, of the main shaft shoulder, the inward concave structure comprises a first circular arc section and a second elliptical arc section which are connected with each other, the second elliptical arc section coincides with the elliptical arc, and the long axis of the elliptical arc is enlarged through the second elliptical arc section, so that the joint of the main shaft shoulder and the main shaft body is in smooth transition.
2. The wind generating set main shaft structure according to claim 1, wherein: and the first circular arc section and the end surface of the spindle shaft shoulder adopt circular angle transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223286493.9U CN219061901U (en) | 2022-12-08 | 2022-12-08 | Main shaft structure of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223286493.9U CN219061901U (en) | 2022-12-08 | 2022-12-08 | Main shaft structure of wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219061901U true CN219061901U (en) | 2023-05-23 |
Family
ID=86344981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223286493.9U Active CN219061901U (en) | 2022-12-08 | 2022-12-08 | Main shaft structure of wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219061901U (en) |
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2022
- 2022-12-08 CN CN202223286493.9U patent/CN219061901U/en active Active
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