CN210799741U - Self-aligning magnetic suspension bearing system and generator - Google Patents
Self-aligning magnetic suspension bearing system and generator Download PDFInfo
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- CN210799741U CN210799741U CN201921003040.6U CN201921003040U CN210799741U CN 210799741 U CN210799741 U CN 210799741U CN 201921003040 U CN201921003040 U CN 201921003040U CN 210799741 U CN210799741 U CN 210799741U
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Abstract
The utility model relates to a magnetic suspension bearing technical field discloses an aligning magnetic suspension bearing system and generator. The system comprises an active magnetic suspension bearing and a mechanical bearing which are coupled with each other, wherein the active magnetic suspension bearing and the mechanical bearing jointly support a main shaft of a generator, the active magnetic suspension bearing comprises an electromagnet and an armature, the electromagnet is arranged on a fixed shaft, the armature is arranged on a movable shaft, and the electromagnet and the armature are matched to form a bearing magnetic loop and generate electromagnetic force. Therefore, unbalanced magnetic tension can be offset, vibration of the magnetic suspension bearing is reduced, and the service life of the mechanical bearing is prolonged; in addition, the radial offset between the stator and the rotor of the generator can be reduced, the radial gap between the stator and the rotor is reduced, the generating efficiency of the generator is improved, and the generating benefit is increased.
Description
Technical Field
The utility model relates to a magnetic suspension bearing technical field especially relates to an aligning magnetic suspension bearing system and generator.
Background
The wind power generator is an electric power device which converts wind energy into mechanical work, drives a rotor to rotate and finally outputs alternating current. Wind power generators can be classified into a double-fed type and a direct-drive type. Compared with a double-fed wind driven generator, the direct-drive wind driven generator drives the motor and the impeller in a direct connection mode, and traditional components such as a gear box are omitted. The direct-drive wind driven generator has the advantage of using direct drive energy, a gearbox structure in a double-fed wind driven generator system is omitted, the number of transmission parts of the generator is reduced, and the abrasion speed is reduced. Because the gear box is a part which is easy to overload and early damage in the megawatt wind driven generator, the direct-drive wind driven generator without the gear box has the advantages of high efficiency, low noise, long service life, small unit volume, low operation and maintenance cost and the like at low wind speed.
The special bearing of the direct-drive wind driven generator is divided into three types, including a main shaft bearing, a yaw bearing and a variable pitch bearing. At present, mechanical bearings are used for all three types of bearings, and the structural forms of the bearings mainly include a four-point contact ball bearing, a cross roller bearing, a cylindrical roller bearing, a self-aligning roller bearing, a deep groove ball bearing and the like. The wind driven generator requires the bearing to have good sealing performance and lubricating performance, impact resistance, long service life and high reliability, the generator needs to be started in the first-level wind and can track the wind direction change, and therefore the bearing structure needs to be specially designed to ensure low friction and high sensitivity.
However, the existing direct-drive wind driven generator has an inner stator and an outer rotor structure, and the generator rotor is of a cup-shaped structure. Only one side of the generator rotor is connected with the fixed shaft through a mechanical bearing, and the other side of the generator rotor is of a cantilever structure. The structural design has the problem of lower rigidity of the rotor of the generator far away from the supporting end.
In addition, the air gap eccentricity phenomenon of the generator may occur due to machining and assembly errors of the stator and the rotor, bending of a main shaft of the rotor, abrasion of a bearing or unbalance of the rotor. The generator operates under the eccentric trouble, because generator air gap magnetic field asymmetry, the generator can appear unbalanced magnetic pull, can aggravate generating set's noise and vibration, arouse that the iron core and the rotor shaft of generator take place deformation, reduce the life of generator to accelerate bearing wear.
SUMMERY OF THE UTILITY MODEL
The utility model provides a self-aligning magnetic suspension bearing system and generator can solve the technical problem that the air gap is eccentric big between the generator stator and rotor among the prior art.
The utility model provides an aligning magnetic suspension bearing system, wherein, this system includes intercoupling's initiative magnetic suspension bearing and mechanical bearing, initiative magnetic suspension bearing with mechanical bearing supports the generator main shaft jointly, initiative magnetic suspension bearing includes electro-magnet and armature two parts, and the electro-magnet is installed in the dead axle, and armature is installed in the moving axis, the electro-magnet with the armature cooperation forms bearing magnetic circuit and produces the electromagnetic force.
Preferably, the magnetic bearing is arranged at a position of the generator remote from the fixed end.
Preferably, the electromagnet is provided with an electromagnetic coil.
Preferably, the inner ring of the mechanical bearing is fixed on the movable shaft, the outer ring of the mechanical bearing is fixed on the fixed shaft, the movable shaft is connected with the fan blade, and the fixed shaft is connected with the tower barrel.
Preferably, the mechanical bearing is a rolling bearing.
Preferably, the system further comprises a detection device, a controller and a power amplifier, wherein the detection device detects the position of the generator rotor and outputs a position signal to the controller, the controller calculates the current value of the electromagnet according to the position signal and outputs the current value to the power amplifier, and the power amplifier outputs a corresponding current to the electromagnetic coil of the electromagnet according to the current value so as to adjust the electromagnetic force of the electromagnet.
Preferably, the detection device is a position sensor.
Preferably, the maximum electromagnetic force generated by the electromagnet is greater than the maximum unbalanced magnetic pull of the generator.
The utility model also provides a generator, wherein, including foretell aligning magnetic suspension bearing system.
Preferably, the generator is a direct-drive wind generator.
By the technical scheme, the active magnetic suspension bearing and the mechanical bearing can be coupled to jointly support the generator rotor in an auxiliary manner, so that unbalanced magnetic tension can be offset, vibration of the magnetic suspension bearing is reduced, and the service life of the mechanical bearing is prolonged; in addition, the radial offset between the stator and the rotor of the generator can be reduced, the radial gap between the stator and the rotor is reduced, the generating efficiency of the generator is improved, and the generating benefit is increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 shows a schematic view of a self-aligning magnetic suspension bearing system according to an embodiment of the present invention;
fig. 2 shows a bearing magnetic circuit in a magnetic suspension bearing according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 shows a schematic view of a self-aligning magnetic suspension bearing system according to an embodiment of the present invention.
Fig. 2 shows a bearing magnetic circuit in a magnetic suspension bearing according to an embodiment of the present invention.
As shown in fig. 1, the embodiment of the utility model provides a self-aligning magnetic suspension bearing system, wherein, this system can include intercoupling's initiative magnetic suspension bearing 1 and mechanical bearing 2, initiative magnetic suspension bearing 1 with mechanical bearing 2 supports generator 3 main shaft jointly, initiative magnetic suspension bearing 1 includes electro-magnet and armature two parts, and the electro-magnet is installed on dead axle 5 (generator dead axle), and armature is installed on moving axis 4 (generator moving axis), the electro-magnet with the armature cooperation forms bearing magnetic circuit (as shown in fig. 2).
By the technical scheme, the active magnetic suspension bearing and the mechanical bearing can be coupled to jointly support the generator rotor in an auxiliary manner, so that unbalanced magnetic tension can be offset, vibration of the magnetic suspension bearing is reduced, and the service life of the mechanical bearing is prolonged; in addition, the radial offset between the stator and the rotor of the generator can be reduced, the radial gap between the stator and the rotor is reduced, the generating efficiency of the generator is improved, and the generating benefit is increased.
In addition, because the magnetic suspension bearing is not in direct contact with the shaft, the abrasion between metals is avoided, the abrasion and noise caused by the high-speed operation of the generator to the bearing of the generator can be avoided, and the service life of the generator can be prolonged.
According to the utility model relates to an embodiment, magnetic bearing sets up keeping away from stiff end position department of generator.
That is, the magnetic bearing is arranged at a distance from the fixed end of the generator, for example to the right of the generator as shown in fig. 1.
It should be understood by those skilled in the art that the illustration of fig. 1 is merely exemplary and is not intended to limit the present invention.
According to the utility model relates to an embodiment, be provided with solenoid on the electro-magnet.
According to the utility model relates to an embodiment, mechanical bearing's inner circle can be fixed on moving axis 4, mechanical bearing's outer lane can be fixed on dead axle 5, moving axis 4 can be connected with fan blade, dead axle 5 can be connected with a tower section of thick bamboo.
In the embodiment of the present invention, for example, the mechanical bearing may be a rolling bearing.
It should be understood by those skilled in the art that the rolling bearing described above is merely an example, and the present invention is not limited thereto.
According to the utility model relates to an embodiment, this system can also include detection device, controller and power amplifier, wherein, detection device detects the position of generator rotor and exports position signal to the controller, the controller basis position signal calculates the current value of electro-magnet and exports to power amplifier, power amplifier basis current value output corresponds the electric current extremely the solenoid of electro-magnet (that is, can provide the required electric current of production electromagnetic force for the electro-magnet) with the regulation the electromagnetic force size of electro-magnet.
That is, the current in the electromagnet can be adjusted in real time through a feedback control manner to realize the adjustment of the electromagnetic force of the electromagnet.
Wherein, the controller calculates according to position signal the control algorithm of the required current value of electro-magnet production electromagnetic force can be for any suitable algorithm among the prior art, in order not to obscure the utility model discloses, the utility model discloses no longer describe herein.
For example, the controller may be a DSP, an FPGA, or the like, but the present invention is not limited thereto.
According to an embodiment of the present invention, the detection device may be, for example, a position sensor.
According to the utility model relates to an embodiment, the biggest electromagnetic force that the electro-magnet produced is greater than the biggest unbalanced magnetic pull force of generator.
Thereby, it can be better ensured that the magnetic bearing can pull the rotor of the generator back to the equilibrium position.
The utility model also provides a generator, can include above-mentioned embodiment the aligning magnetic suspension bearing system.
The generator is a direct-drive wind driven generator.
In other words, the self-aligning magnetic suspension bearing system according to the above embodiments of the present invention can be applied to a direct-drive wind power generator, for example.
Will in the above embodiment of the utility model the aligning magnetic suspension bearing system be applied to and directly drive type aerogenerator, can reduce the radial offset between the generator stator and rotor, improve aerogenerator's efficiency, reduce magnetic suspension bearing's vibration, prolong generator and mechanical bearing's life.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a self-aligning magnetic suspension bearing system, its characterized in that, this system is including the initiative magnetic suspension bearing (1) and the mechanical bearing (2) of intercoupling, initiative magnetic suspension bearing (1) with mechanical bearing (2) support generator (3) main shaft jointly, initiative magnetic suspension bearing (1) includes electro-magnet and armature two parts, and the electro-magnet is installed on dead axle (5), and armature is installed on moving axis (4), the electro-magnet with armature cooperation forms bearing magnetic circuit and produces the electromagnetic force.
2. System according to claim 1, characterized in that the magnetic bearings are arranged at a position of the generator (3) remote from the fixed end.
3. The system of claim 2, wherein the electromagnet is provided with an electromagnetic coil.
4. The system according to claim 3, characterized in that the inner ring of the mechanical bearing is fixed on a moving shaft (4), the outer ring of the mechanical bearing is fixed on a fixed shaft (5), the moving shaft (4) is connected with the fan blades, and the fixed shaft (5) is connected with the tower.
5. The system of claim 4, wherein the mechanical bearing is a rolling bearing.
6. The system according to any one of claims 1-5, further comprising a detection device, a controller and a power amplifier, wherein the detection device detects the position of the generator rotor and outputs a position signal to the controller, the controller calculates a current value of the electromagnet according to the position signal and outputs the current value to the power amplifier, and the power amplifier outputs a corresponding current to the electromagnetic coil of the electromagnet according to the current value to adjust the electromagnetic force of the electromagnet.
7. The system of claim 6, wherein the detection device is a position sensor.
8. A system according to claim 6, characterized in that the maximum electromagnetic force generated by the electromagnets is larger than the maximum unbalanced magnetic pull of the generator (3).
9. A generator comprising a self-aligning magnetic bearing system according to any one of claims 1 to 8.
10. The generator of claim 9, wherein the generator is a direct drive wind generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921003040.6U CN210799741U (en) | 2019-07-01 | 2019-07-01 | Self-aligning magnetic suspension bearing system and generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921003040.6U CN210799741U (en) | 2019-07-01 | 2019-07-01 | Self-aligning magnetic suspension bearing system and generator |
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| CN210799741U true CN210799741U (en) | 2020-06-19 |
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| CN201921003040.6U Active CN210799741U (en) | 2019-07-01 | 2019-07-01 | Self-aligning magnetic suspension bearing system and generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| WO2022000788A1 (en) * | 2020-06-30 | 2022-01-06 | 苏州苏试试验集团股份有限公司 | Magnetic guide structure of moving coil, vibration table having magnetic guide structure, and adjustment method |
-
2019
- 2019-07-01 CN CN201921003040.6U patent/CN210799741U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177868A (en) * | 2019-07-01 | 2021-01-05 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| CN112177868B (en) * | 2019-07-01 | 2022-04-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Self-aligning magnetic suspension bearing system and generator |
| WO2022000788A1 (en) * | 2020-06-30 | 2022-01-06 | 苏州苏试试验集团股份有限公司 | Magnetic guide structure of moving coil, vibration table having magnetic guide structure, and adjustment method |
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