CN216774512U - Insulating rotating shaft for motor and wind driven generator - Google Patents
Insulating rotating shaft for motor and wind driven generator Download PDFInfo
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- CN216774512U CN216774512U CN202220492000.8U CN202220492000U CN216774512U CN 216774512 U CN216774512 U CN 216774512U CN 202220492000 U CN202220492000 U CN 202220492000U CN 216774512 U CN216774512 U CN 216774512U
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Abstract
The utility model discloses an insulating rotating shaft for a motor and a wind driven generator, and relates to the technical field of motors. The position through bearing installation in the pivot sets up the circulation that the insulating layer avoided the electric current to this damage that reduces the bearing, its simple structure need not to purchase special insulating bearing, reduce cost, and the pivot body adopts the setting of hollow shaft, and it can reduce the weight of pivot body.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to an insulating rotating shaft for a motor and a wind driven generator.
Background
The wind driven generator is used as power generation equipment taking wind energy as power, can convert the wind energy into electric energy and output the electric energy, and is widely applied under the situation that the country advocates application of environment-friendly green energy energetically. The wind driven generator consists of two basic parts, namely a stator and a rotor, wherein the stator is a fixed part, the rotor rotates around a rotating shaft to form a rotating magnetic field, and the stator winding is cut to generate current for generating electricity. The rotation of the rotating shaft is completed by the support of bearings at two ends of the generator, the bearings are used as important components of the generator, and once the bearings break down, the generator stops working.
The main cause of bearing damage is the electric corrosion phenomenon of shaft current, during the operation of the wind driven generator, the shaft current is generated due to the asymmetry of a magnetic circuit, the high-frequency component of a high-frequency power supply, the zero-sequence component voltage and the like, and the overlarge shaft current is discharged at the bearing ball and the roller to form pits or pits to accelerate the damage of the bearing, so that the bearing fault and the vibration abnormality are caused. In order to solve the problem of electric corrosion of the bearing, a designer adopts a special insulating bearing, namely, insulating layers are plated on the outer ring and the side surface of the bearing to separate the bearing from being electrically connected with a stator, so that the generation of current is prevented, and the damage of the bearing is avoided. However, the price of the special insulating bearing is high, which is about 3 times of that of the common bearing, so the use cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an insulating rotating shaft for a motor and a wind driven generator, which are used for solving the problems in the prior art and reducing the cost.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides an insulating rotating shaft for a motor, which comprises a rotating shaft body, wherein the rotating shaft body is a hollow shaft, a first groove and a second groove are arranged on the outer wall of the rotating shaft body, the first groove and the second groove are respectively used for mounting a first bearing and a second bearing, and insulating layers are arranged at the contact position of the first groove and the first bearing and the contact position of the second groove and the second bearing.
Preferably, the insulating layer is formed by thermally spraying high-purity alumina, teflon or resin-impregnated glass fiber mesh weftless tape.
Preferably, the thickness of the insulating layer is 0.5 mm.
Preferably, first recess includes first step groove and first snap ring groove, first step groove can block one side axial position of first bearing, can the joint be used for blockking in the first snap ring groove the snap ring of first bearing opposite side axial position, first step groove with the snap ring with the position of first bearing contact all is provided with the insulating layer.
The utility model also provides a wind driven generator which comprises a bearing seat, a first bearing, a second bearing, a stator base, a coil group and the insulated rotating shaft for the motor, wherein the first bearing is provided with a first inner ring and a first outer ring, the first inner ring is fixedly sleeved in the first groove, the second bearing is provided with a second inner ring and a second outer ring, the second inner ring is fixedly sleeved in the second groove, the first outer ring and the second outer ring are both fixedly arranged on the bearing seat, the bearing seat is fixedly arranged on the stator base, and the coil group is fixedly arranged on the inner side wall of the stator base.
Preferably, a rotor bracket for cutting the magnetic induction lines is fixedly arranged on the rotating shaft body.
Preferably, a transmission flange is fixedly arranged on the rotating shaft body, and the rotor support is fixedly arranged on the transmission flange.
Preferably, a cooling water jacket is arranged between the inner wall of the stator base and the coil group.
Preferably, an end cover is fixedly arranged at one end, close to the transmission flange, of the stator base, and the end cover can seal an opening of the stator base.
Compared with the prior art, the utility model has the following technical effects:
according to the insulated rotating shaft for the motor, the insulating layer is arranged at the position where the bearing is arranged on the rotating shaft to avoid the circulation of current, so that the damage of the bearing is reduced, the structure is simple, a special insulated bearing is not required to be purchased, the cost is reduced, and the weight of the rotating shaft body can be reduced due to the arrangement of the hollow shaft.
Furthermore, the insulating layer is formed by adopting a mode of thermally spraying high-purity alumina, Teflon or resin-impregnated glass fiber mesh weftless tape, and the processing technology is simple and easy to process and manufacture.
Further, the thickness setting of insulating layer is at 0.5mm, and it can guarantee insulating nature and guarantee certain wearing and tearing and use increase of service life.
Furthermore, the first groove is used for limiting the axial movement of the bearing in a form of a stepped groove and a clamping ring matched with the clamping ring, the structure is simple, and the bearing is convenient to mount and dismount.
The utility model also provides a wind driven generator, which reduces the electric corrosion damage of the bearing by adopting the mode of the insulating rotating shaft for the motor and has low manufacturing cost.
Furthermore, the rotating shaft body is provided with a rotor support used for cutting the magnetic induction lines, and the structure is simple.
Furthermore, the rotor support and the rotating shaft body are connected through a transmission flange, and the transmission connection is stable and reliable.
Furthermore, the cooling water jacket can ensure the timely dissipation of the heat inside the motor, so that the motor can run more stably to generate power.
Furthermore, an end cover is arranged on the stator base, so that foreign matters can be prevented from entering the stator base, and the normal operation of the motor is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an overall structure of an insulated rotating shaft for a motor according to the present invention;
fig. 2 is a schematic view of the overall structure of the wind turbine provided by the present invention.
In the figure: 100-insulating rotating shaft for motor; 200-a wind power generator; 1-a rotating shaft body; 21-a first groove; 211 — first step groove; 212-a first snap ring groove; 22-a first bearing; 31-a second groove; 32-a second bearing; 4-bearing seats; 5-stator frame; 6-coil assembly; 7-a rotor support; 8-a transmission flange; 9-cooling water jacket; 10-end cap.
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.
The utility model aims to provide an insulating rotating shaft for a motor and a wind driven generator, which are used for solving the problems in the prior art and reducing the cost.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The embodiment provides an insulated rotating shaft 100 for a motor, as shown in fig. 1, which includes a rotating shaft body 1, where the rotating shaft body 1 is a hollow shaft, specifically, the material of the rotating shaft body 1 is nodular cast iron, a first groove 21 and a second groove 31 are provided on an outer wall of the rotating shaft body 1, specifically, when the first groove 21 and the second groove 22 are U-shaped grooves, the rotating shaft body 1 may be composed of multiple sections, the rotating shaft bodies 1 of two adjacent sections are connected to form the first groove 21 and the second groove 22, an insulating layer is sprayed in the two grooves, or the first groove 21 and the second groove 22 are U-shaped grooves, and insulating layers are sprayed in the two grooves, the outer diameters of the two grooves after the insulating layers are sprayed are the same as the mounting inner diameter of a bearing, the first groove 21 and the second groove 31 are respectively used for mounting a first bearing 22 and a second bearing 32, specifically, the first bearing 22 is a cylindrical bearing, the second bearing 32 is a ball bearing, and the first groove 21 and the second groove 31 are provided with insulating layers at the contact positions with the first bearing 22 and the second bearing 32 respectively. The position through bearing installation on the pivot sets up the circulation that the insulating layer avoids the electric current to this damage that reduces the bearing, its simple structure need not to purchase special insulating bearing, reduce cost, and the pivot body adopts the setting of hollow shaft, and it can reduce the weight of pivot body.
In the alternative of this embodiment, the insulating layer is preferably formed by thermally spraying high-purity alumina, teflon or a resin-impregnated fiberglass mesh weftless tape. The insulating layer is formed by thermally spraying high-purity alumina, Teflon or resin impregnated glass fiber mesh weftless tape, and the processing technology is simple and easy to process and manufacture.
In an alternative of this embodiment, it is preferable that the thickness of the insulating layer is 0.5mm, and specifically, the thickness of the insulating layer is not limited to 0.5mm, and may be set according to a use requirement. The thickness setting of insulating layer is at 0.5mm, and it can guarantee insulating nature and guarantee certain wearing and tearing and use increase of service life.
In the alternative of this embodiment, it is preferable, as shown in fig. 1, the first groove 21 includes a first step groove 211 and a first snap ring groove 212, the first step groove 211 can block an axial position of one side of the first bearing 22, the snap ring in the first snap ring groove 212 can be clamped to block an axial position of the other side of the first bearing 22, specifically, insulation of the snap ring can be insulation processing technology the same as that of the first groove 21, or insulation material can be used for manufacturing the snap ring, or insulation sticker can be pasted outside the metal snap ring, insulation layers are disposed at positions where the first step groove 211 and the snap ring contact the first bearing 22, specifically, an outer diameter of the first step groove 211 after being sprayed with the insulation layers is the same as an installation inner diameter of the first bearing 22, and the first groove 21 and the second groove 31 are both structures in the same form. The first groove 21 is used for limiting the axial movement of the bearing in a form of a stepped groove and a snap ring matched with the snap ring, and is simple in structure and convenient to mount and dismount.
Example two
The embodiment further provides a wind power generator 200, as shown in fig. 2, which includes a bearing seat 4, a first bearing 22, a second bearing 32, a stator base 5, a coil assembly 6 and an insulating rotating shaft 100 for a motor according to the first embodiment, where the first bearing 22 has a first inner ring and a first outer ring, specifically, the first inner ring is coaxially and rotatably connected with the first outer ring, the first inner ring is fixedly sleeved in the first groove 21, the second bearing 32 has a second inner ring and a second outer ring, specifically, the second inner ring is coaxially and rotatably connected with the second outer ring, the second inner ring is fixedly sleeved in the second groove 31, the first outer ring and the second outer ring are both fixedly disposed on the bearing seat 4, the bearing seat 4 is fixedly disposed on the stator base 5, and the coil assembly 6 is fixedly disposed on an inner side wall of the stator base 5. The electric corrosion damage of the bearing is reduced by adopting the mode of the insulating rotating shaft 100 for the motor, and the manufacturing cost is low.
In an alternative of this embodiment, it is preferable that, as shown in fig. 2, a rotor bracket 7 for cutting the magnetic induction lines is fixedly provided on the rotating shaft body 1. The rotating shaft body 1 is provided with a rotor bracket 7 for cutting magnetic induction lines, and the structure is simple.
In an alternative of this embodiment, it is preferable that, as shown in fig. 2, the rotating shaft body 1 is fixedly provided with a transmission flange 8, and the rotor support 7 is fixedly provided on the transmission flange 8. The rotor bracket 7 is connected with the rotating shaft body 1 through a transmission flange 8, and the transmission connection is stable and reliable.
In an alternative of this embodiment, it is preferable that a cooling water jacket 9 is provided between the inner wall of the stator frame 5 and the coil assembly 6, as shown in fig. 2. The cooling water jacket 9 can ensure the timely dissipation of the heat inside the motor, so that the motor can run more stably to generate power.
In an alternative of this embodiment, it is preferable that, as shown in fig. 2, an end cover 10 is further fixedly disposed at an end of the stator frame 5 close to the transmission flange 8, and the end cover 10 can seal an opening at the end of the stator frame 5. The end cover 10 is arranged on the stator base 5, and can prevent foreign matters from entering the stator base 5, so that the normal operation of the motor is ensured.
The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (9)
1. The utility model provides an insulating pivot for motor which characterized in that: the hollow shaft structure comprises a rotating shaft body, the rotating shaft body is a hollow shaft, a first groove and a second groove are formed in the outer wall of the rotating shaft body, the first groove and the second groove are respectively used for installing a first bearing and a second bearing, the first groove is used for enabling the first bearing to be in contact with the second groove, and the second groove is used for enabling the second bearing to be in contact with the second groove and is provided with an insulating layer.
2. The insulated rotating shaft for a motor according to claim 1, wherein: the insulating layer is formed by thermally spraying high-purity alumina, Teflon or resin-impregnated glass fiber mesh weftless tape.
3. The insulated rotating shaft for a motor according to claim 1, wherein: the thickness of the insulating layer is 0.5 mm.
4. The insulated rotating shaft for a motor according to claim 1, wherein: first recess includes first step groove and first snap ring groove, first step groove can block one side axial position of first bearing, can the joint be used for blockking in the first snap ring groove first bearing opposite side axial position's snap ring, first step groove with the snap ring with the position of first bearing contact all is provided with the insulating layer.
5. A wind power generator characterized by: the motor insulation rotating shaft comprises a bearing seat, a first bearing, a second bearing, a stator base, a coil group and the motor insulation rotating shaft as claimed in any one of claims 1 to 4, wherein the first bearing is provided with a first inner ring and a first outer ring, the first inner ring is fixedly sleeved in the first groove, the second bearing is provided with a second inner ring and a second outer ring, the second inner ring is fixedly sleeved in the second groove, the first outer ring and the second outer ring are fixedly arranged on the bearing seat, the bearing seat is fixedly arranged on the stator base, and the coil group is fixedly arranged on the inner side wall of the stator base.
6. The wind generator of claim 5, wherein: and a rotor bracket for cutting the magnetic induction lines is fixedly arranged on the rotating shaft body.
7. The wind generator of claim 6, wherein: the rotating shaft body is fixedly provided with a transmission flange, and the rotor support is fixedly arranged on the transmission flange.
8. The wind generator of claim 5, wherein: and a cooling water jacket is arranged between the inner wall of the stator base and the coil group.
9. The wind generator of claim 7, wherein: the stator frame is close to transmission flange one end still fixedly is provided with the end cover, the end cover can seal the opening of stator frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220492000.8U CN216774512U (en) | 2022-03-09 | 2022-03-09 | Insulating rotating shaft for motor and wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220492000.8U CN216774512U (en) | 2022-03-09 | 2022-03-09 | Insulating rotating shaft for motor and wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216774512U true CN216774512U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220492000.8U Active CN216774512U (en) | 2022-03-09 | 2022-03-09 | Insulating rotating shaft for motor and wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216774512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000871A1 (en) * | 2022-06-29 | 2024-01-04 | 北京金风科创风电设备有限公司 | Transmission system and wind power generating set |
-
2022
- 2022-03-09 CN CN202220492000.8U patent/CN216774512U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000871A1 (en) * | 2022-06-29 | 2024-01-04 | 北京金风科创风电设备有限公司 | Transmission system and wind power generating set |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Pan Zhigang Inventor after: Yang Yun Inventor after: Yi Hongtuan Inventor before: Pan Zhigang Inventor before: Zhou Zhiqiang Inventor before: Yang Yun Inventor before: Jing Weifeng Inventor before: Zhao Dongchao Inventor before: Pei Xiaomei Inventor before: Yi Hongtuan |