CN116792431A - Fan hybrid brake disc and fan unit - Google Patents
Fan hybrid brake disc and fan unit Download PDFInfo
- Publication number
- CN116792431A CN116792431A CN202310766151.7A CN202310766151A CN116792431A CN 116792431 A CN116792431 A CN 116792431A CN 202310766151 A CN202310766151 A CN 202310766151A CN 116792431 A CN116792431 A CN 116792431A
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- fan
- eddy current
- braking
- brake disc
- brake
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- 230000005284 excitation Effects 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
- F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Abstract
The application relates to the technical field of fan braking, in particular to a fan hybrid brake disc and a fan unit. A fan hybrid brake rotor comprising: a brake rotor, the brake rotor comprising: an eddy current braking portion of annular structure disposed in a circumferential direction of the brake disc body surface; the eddy current braking parts are suitable for being arranged corresponding to the excitation assembly, take the center of the braking disc body as a center point, and are provided with a plurality of grooves in an equiangular distribution along the circumferential direction; in the use process, the excitation assembly is electrified to generate a magnetic field, the eddy current braking parts cut the magnetic field in rotation to generate vortex-shaped induced currents, and each pair of grooves normalizes the closed path of the induced currents so as to promote braking moment. The application solves the problems that the horizontal edge effect exists and the eddy current braking efficiency is affected in the flat type eddy current braking device, and realizes the function of mixing and braking of fan machinery and eddy current, thereby providing a fan mixing brake disc and a fan unit.
Description
Technical Field
The application relates to the technical field of fan braking, in particular to a fan hybrid brake disc and a fan unit.
Background
Wind energy is used as an important green renewable energy source and plays an important role in achieving the 'double carbon' target and transformation of a low-carbon energy system. Wind power generation is the main utilization mode of wind energy at present, and along with the development of wind power industry and policy requirements, wind power generators tend to develop in large scale. The braking device is one of key components of the wind generating set, and the braking device is mainly used for braking the fan under the emergency conditions of daily maintenance, fault occurrence, overspeed and the like of the fan, and the stable operation of the brake directly influences the safety of the fan.
At present, most of wind turbine generator system mechanical brake devices are hydraulic drive type caliper disc mechanical brake, and most of the mechanical brake devices of large and medium wind turbine generator systems adopt high-speed shaft mechanical brake. However, the mechanical braking mode belongs to contact friction braking, and friction heat and friction mechanical abrasion generated in the braking process of a mechanical brake disc and a brake pad cannot be avoided, so that the braking performance of the brake is reduced or even fails, and the service life of the brake is shortened. Meanwhile, the vibration noise is larger, the mechanical failure rate is higher, and the operation and maintenance quantity is larger. High speed shaft braking also causes problems such as load shock of the gearbox, reduced system stability, etc.
The problem with mechanical braking devices can be solved by using a contactless eddy current brake. At present, the eddy current braking technology is used in the fields of rail transit, heavy-duty vehicles and the like, and is mainly of a linear, axial and radial eddy current braking device, a brake disc or a brake rail is of a flat plate structure, and the flat plate type eddy current braking device has a transverse edge effect to influence braking efficiency.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to overcome the defects that the transverse edge effect exists and the eddy current braking efficiency is affected in the flat-plate type eddy current braking device in the prior art, so that the fan hybrid brake disc and the fan unit are provided.
In order to solve the above problems, the present application provides a hybrid brake disc for a fan, comprising:
a brake rotor, the brake rotor comprising: an eddy current braking portion of annular structure disposed in a circumferential direction of the brake disc body surface; the eddy current braking parts are suitable for being arranged corresponding to the excitation assembly, take the center of the braking disc body as a center point, and are provided with a plurality of grooves in an equiangular distribution along the circumferential direction;
in the use process, the excitation assembly is electrified to generate a magnetic field, the eddy current braking parts cut the magnetic field in rotation to generate vortex-shaped induced currents, and each pair of grooves normalizes the closed path of the induced currents so as to promote braking moment.
Optionally, the vortex braking portion includes magnetic conduction board and current conducting plate, the magnetic conduction board is equipped with a plurality of protruding end of equiangle, the current conducting plate is equipped with a plurality of through-hole that the equiangle set up, through-hole and protruding end one-to-one set up, just the thickness of through-hole is greater than the height of protruding end.
Optionally, the conductive plate is made of non-magnetic metal.
Optionally, the through hole and the protruding end are fan-shaped structures with shapes being matched, and the through hole comprises a fan-shaped conductor and an end conductor.
Optionally, the brake disc body further includes a central connection portion and a mechanical brake portion, the central connection portion is provided with a central hole, and the brake disc is sequentially provided with the central connection portion, the eddy current brake portion and the mechanical brake portion from the central hole to the radial outside.
A fan unit comprises the fan hybrid brake disc.
Optionally, the electric motor further comprises a transmission shaft and an excitation assembly, wherein the brake disc is sleeved on the periphery of the transmission shaft, and a mechanical air gap exists between the excitation assembly and the eddy current braking part.
Optionally, the exciting assembly comprises an exciting iron core and an exciting winding, wherein the exciting iron core comprises a yoke part and an even number of tooth parts; the tooth parts are fixed on the yoke parts, the exciting windings are respectively wound on each tooth part, the yoke parts are arranged at one ends of the tooth parts, which are away from the eddy current braking parts, and a mechanical air gap exists between the tooth parts and the eddy current braking parts.
Optionally, a mechanical caliper is also included, which is adapted to the mechanical brake.
The technical scheme of the application has the following advantages:
1. the application provides a fan hybrid brake disc, which comprises: the brake disc body comprises an eddy current braking part which is arranged on the surface of the brake disc body in the circumferential direction and has an annular structure, wherein the eddy current braking part takes the center of the brake disc body as a center point, and a plurality of grooves are respectively arranged along the circumferential equal angle. In the use, the eddy current braking portion corresponds the setting with the excitation subassembly, produces the magnetic field at the excitation subassembly circular telegram, and eddy current braking portion cuts the magnetic field in order to produce vortex form induced current (also known as "vortex") in the rotation, and the closed path of induced current is normalized to each recess, has solved the problem that the closed path of induced current can't be normalized to the flat-type eddy current braking portion among the prior art. In the braking process, the magnitude of the braking force is determined by the axial component of the air gap magnetic field generated by the exciting part and the eddy current braking part and the radial component of eddy current, and the coupling part of the exciting part and the eddy current braking part in the prior art has not only the radial component of eddy current, but also the tangential component, but the radial component is absent because a closed path of induced current cannot be generated and regulated due to the transverse edge effect, and the path of the induced current is irregular. The eddy current braking part provided by the application is provided with a plurality of grooves, the grooves are distributed along the circumferential equiangular degree of the braking disc body so as to be matched with the exciting part along the radial direction, and induced current with a standard path is generated, so that the radial component of eddy current of the coupling part of the exciting part and the eddy current braking part is favorably improved, the edge effect is reduced, the braking moment is effectively improved, the overall deceleration time of the braking disc body is shortened, and the braking efficiency is improved.
2. The application provides a fan hybrid brake disc, wherein an eddy current braking part comprises a magnetic conduction plate and a conductive plate, the magnetic conduction plate is provided with a plurality of convex ends with equal angles, the conductive plate is provided with a plurality of through holes with equal angles, the through holes are arranged in one-to-one correspondence with the convex ends, the thickness of each through hole is larger than the height of each convex end, the magnetic conduction plate plays a role in supporting and closing a magnetic circuit, and the conductive plate is mainly used for generating eddy currents and providing braking torque. The protruding ends are arranged in one-to-one correspondence with the through holes so that the conductive plates can be clamped into the magnetic conductive plates, and the thickness of the through holes is larger than the height of the protruding ends to form grooves.
3. The fan hybrid brake disc provided by the application has the advantages that the through hole and the protruding end are of the sector structure with the shape being matched, the through hole comprises the sector conductor and the end conductor, the radial component of vortex is mainly in the sector conductor, and the end conductor is used for forming a standard vortex closed path.
4. The application provides a fan hybrid brake disc, which comprises a brake disc body, a central connecting part and a mechanical brake part, wherein the central connecting part is provided with a central hole, and the brake disc is sequentially arranged as the central connecting part, the eddy current brake part and the mechanical brake part from the central hole to the radial outside. The center connecting portion and the center hole are connected with the fan unit, the turbine braking portion is used for turbine braking, the mechanical braking portion is used for mechanical braking, in the using process, an eddy current braking and mechanical braking mixed braking mode is adopted, under non-emergency braking working conditions such as daily maintenance, the rotating speed of an impeller of the fan assembly is firstly slowed down through turbine braking, after the rotating speed is slowed down to a preset value, the eddy current braking is stopped, the mechanical braking is started, mechanical impact and abrasion of the mechanical braking portion, which are suffered by braking when the mechanical braking portion rotates at a high speed, are effectively reduced, and the service life of the fan mixed braking disc is prolonged. Under emergency braking working conditions such as failure or overspeed, the fan is stopped by adopting an eddy current braking and mechanical braking mixed braking mode, so that the impeller is rapidly stopped to rotate, and emergency braking is realized.
5. The fan unit provided by the application has the advantages of any one of the above because the fan mixed brake disk is adopted.
6. The fan unit provided by the application further comprises a transmission shaft and an excitation component, wherein the brake disc is sleeved on the periphery of the transmission shaft, a mechanical air gap is formed between the excitation component and the eddy current braking part, so that the excitation component and the brake disc body are in non-contact, the non-contact braking is realized, and the fan unit has the characteristics of no friction and quick response.
7. The application provides a fan unit, wherein an excitation assembly comprises an excitation iron core and an excitation winding, wherein the excitation iron core comprises a yoke part and even number of tooth parts; the tooth parts are fixed on the yoke parts, the exciting windings are respectively wound on each tooth part, the yoke parts are arranged at one ends of the tooth parts, which are away from the eddy current braking parts, and a mechanical air gap exists between the tooth parts and the eddy current braking parts. In the use process, the directions of current flowing into adjacent windings are opposite, and N-S-N-S magnetic pole arrangement is formed so as to generate a magnetic field.
8. The fan unit provided by the application further comprises a mechanical caliper, and the mechanical caliper is matched with the mechanical braking part to realize mechanical braking.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a blower assembly provided in an embodiment of the present application;
FIG. 2 is a schematic illustration of a hybrid wind turbine brake disc provided in an embodiment of the present application;
FIG. 3 is a schematic illustration of a hybrid wind turbine rotor with conductive plates removed in an embodiment of the present application;
FIG. 4 is a schematic view of a conductive plate provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of a hybrid brake disc and field assembly for a wind turbine provided in an embodiment of the present application;
FIG. 6 is a schematic view of an excitation assembly provided in an embodiment of the present application;
FIG. 7 is a schematic view of a closed path of a conductive plate provided in an embodiment of the present application;
FIG. 8 is a schematic diagram of a hybrid brake disc and field assembly for a wind turbine provided in an embodiment of the present application;
FIG. 9 is a schematic diagram of a hybrid brake disc and field assembly for a wind turbine provided in an embodiment of the present application;
FIG. 10 is a schematic diagram of a hybrid brake disc and field assembly for a wind turbine provided in an embodiment of the present application;
FIG. 11 is a schematic diagram of a hybrid brake disc and field assembly for a wind turbine provided in an embodiment of the present application;
FIG. 12 is a schematic diagram of a closed path of a fan hybrid brake rotor generating turbine provided in an embodiment of the present application.
Reference numerals illustrate: 1. a gear box; 2. a mechanical caliper; 3. a generator; 4. a brake disc body; 5. an excitation assembly; 6. a controller; 7. a mechanical braking part; 8. an eddy current braking unit; 9. a center connection portion; 10. a central bore; 11. a protruding end; 12. a conductive plate; 13. an excitation iron core; 14. a yoke; 15. a tooth portion; 16. exciting winding; 17. an end conductor; 18. a sector conductor; 19. closing the path; 20. radial component.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
One embodiment of a fan hybrid brake rotor as shown in fig. 1-12, comprises: the brake disc body 4, the brake disc body 4 includes center connecting portion 9, vortex braking portion 8 and mechanical braking portion 7, center connecting portion 9 is equipped with central hole 10, the brake disc outwards sets gradually as center connecting portion 9, vortex braking portion 8 and mechanical braking portion 7 in radial from central hole 10, and wherein, the thickness of center connecting portion 9 is less than mechanical braking portion 7 to make vortex braking portion 8 be the inclined plane, the inclined plane design is in order to alleviate the whole weight of hybrid brake disc.
As shown in fig. 2, 3 and 4, an annular eddy current braking part 8 is arranged on the surface of the brake disc body 4 in the circumferential direction, the eddy current braking part 8 takes the center of the brake disc body 4 as a center point, and a plurality of grooves are distributed along the circumferential direction at equal angles. As shown in fig. 3 and 4, the eddy current braking portion 8 includes a magnetic conductive plate and a conductive plate 12, the magnetic conductive plate is provided with a plurality of protruding ends 11 with equal angles, the conductive plate 12 is provided with a plurality of through holes with equal angles, the through holes are arranged in one-to-one correspondence with the protruding ends 11, and the thickness of the through holes is greater than the height of the protruding ends 11. As shown in fig. 3, 4 and 7, the magnetic conductive plate, the central connecting portion 9 and the mechanical braking portion 7 are integrally formed, the through hole of the conductive plate 12 and the protruding end 11 of the magnetic conductive plate are in a fan-shaped structure with shape matching, the through hole comprises a fan-shaped conductor 18 and an end conductor 17, the radial component 20 of eddy current is mainly in the fan-shaped conductor 18, and the end conductor 17 is used for forming a normal eddy current closed path 19. The conductive plate 12 is made of non-magnetically conductive metal, the non-magnetically conductive metal has good electrical conductivity, and the magnetically conductive plate and the mechanical brake 7 are made of cast iron. Specifically, the conductive plate 12 is made of copper.
The fan unit, as shown in fig. 1, comprises an impeller, a transmission shaft, a gear box 1, a brake disc body 4, an excitation assembly 5, a generator 3, a mechanical caliper 2 and a controller 6, wherein the gear box 1, the brake disc body 4 and the excitation assembly 5 are sequentially arranged from the impeller towards the generator 3, a speed sensor is arranged on the brake disc body 4, the brake disc body 4 and the excitation assembly 5 are correspondingly arranged, the mechanical caliper 2 and the mechanical brake part 7 are correspondingly arranged, a mechanical air gap exists, and the controller 6 is respectively in communication connection with the transmission shaft, the gear box 1, the excitation assembly 5, the generator 3, the mechanical caliper 2 and the speed sensor.
As shown in fig. 6, the exciting assembly 5 comprises an exciting iron core 13 and an exciting winding 16, the exciting iron core 13 comprises a yoke part 14 and an even number of tooth parts 15, and the exciting iron core 13 is formed by laminating silicon steel sheets; the teeth 15 are fixed to the yoke 14, the excitation windings 16 are wound around each of the teeth 15, the yoke 14 is provided at one end of the teeth 15 facing away from the eddy current braking portions 8, and a mechanical air gap is provided between the teeth 15 and the eddy current braking portions 8. As shown in fig. 5, the corresponding arrangement of the exciting assembly 5 and the brake disc body 4 is a single-sided fan-shaped arrangement.
The application method of the fan hybrid brake disc comprises the following steps:
1) In the power generation process of the rotation of the impeller, a mode of vortex braking and mechanical braking mixed braking is adopted, and a speed sensor detects the speed of the brake disc body 4 and transmits the speed to the controller 6 in real time;
2) Under non-emergency braking working conditions such as daily maintenance, the rotating speed of an impeller of a fan assembly is slowed down through eddy current braking, a controller 6 controls an excitation assembly 5 to supply current, adjacent windings supply current in opposite directions to form N-S-N-S magnetic pole arrangement, the minimum unit of an excitation part is a pair of magnetic poles formed by 2 windings, an eddy current braking part 8 cuts a magnetic field in rotation to generate eddy-current induction (also called 'eddy'), each pair of grooves standardizes a closed path 19 of the induction current, wherein a sector conductor 18 of a conductive plate 12 is mainly a radial component of the eddy current, and an end conductor 17 is used for forming a standard eddy current closed path 19, so that the radial component of the eddy current of a coupling part of the excitation part and the eddy current braking part 8 is improved, the edge effect is reduced, the braking moment is effectively improved, the integral deceleration time of a brake disc body 4 is shortened, and the braking efficiency is improved; when the speed is reduced to a preset value, stopping eddy current braking, starting mechanical braking, and controlling the mechanical calipers 2 to be in frictional contact with the mechanical braking part 7 at a lower speed by the controller 6, so that mechanical impact and abrasion of the mechanical braking part 7 during high-speed rotation are effectively reduced, and the service life of the fan hybrid brake disc is prolonged;
3) Under emergency braking conditions such as failure or overspeed, the controller 6 simultaneously adopts an eddy current braking and mechanical braking mixed braking mode to stop the fan, so that the impeller can rapidly stop rotating, and emergency braking is realized.
The application provides a fan hybrid brake disc, which has the following advantages: (1) The vortex braking is a non-contact braking mode, and has the characteristics of no friction and quick response; (2) The method of mixing the eddy current braking and the mechanical braking is adopted, so that the requirements on the mechanical braking device of the wind turbine generator can be reduced and the service life of the mechanical braking part 7 can be prolonged while the safe and reliable braking and the braking capacity regulation and control capability are improved; (3) The brake disc body 4 adopts an integrated design, has the functions of eddy current braking and mechanical braking, and maintains the characteristic of simple integral structure of the brake disc body 4; (4) The conducting plate 12 of the brake disc vortex brake part 8 adopts an annular-fan-shaped through hole structure, so that the edge effect can be reduced, and the braking torque and the braking efficiency of the vortex device can be improved.
As an alternative embodiment, the conductive plate 12 may be made of a non-magnetically conductive metal such as aluminum.
As an alternative embodiment, the material of the magnetic conductive plate and the mechanical brake 7 may be steel or the like.
As an alternative embodiment, as shown in fig. 8, 9, 10 and 11, the corresponding arrangement of the exciting assembly 5 and the brake disc body 4 may also be in the form of a symmetrical sector, a bilateral sector, a symmetrical bilateral sector, a disc structure, etc.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present application.
Claims (9)
1. A fan hybrid brake rotor, comprising:
a brake disc body (4), the brake disc body (4) comprising: an eddy current braking portion (8) of annular structure provided in the circumferential direction of the surface of the brake disc body (4); the eddy current braking parts (8) are suitable for being arranged corresponding to the excitation assembly (5), and the eddy current braking parts (8) take the center of the brake disc body (4) as a center point and are provided with a plurality of grooves in a circumferential equiangular distribution;
in use, the exciting assembly (5) is electrified to generate a magnetic field, the eddy current braking parts (8) cut the magnetic field in rotation to generate eddy induced currents, and each pair of grooves normalizes a closed path (19) of the induced currents so as to promote braking moment.
2. The hybrid brake disc of a wind turbine according to claim 1, characterized in that the eddy current braking part (8) comprises a magnetic conductive plate and an electric conductive plate (12), wherein the magnetic conductive plate is provided with a plurality of protruding ends (11) with equal angles, the electric conductive plate (12) is provided with a plurality of through holes arranged with equal angles, the through holes are arranged in one-to-one correspondence with the protruding ends (11), and the thickness of the through holes is larger than the height of the protruding ends (11).
3. The hybrid brake disc of claim 2, wherein the conductive plate (12) is a non-magnetically conductive metallic material.
4. Fan hybrid brake disc according to claim 2, characterized in that the through hole and the protruding end (11) are of a shape-adapted fan-shaped structure, the through hole comprising a fan-shaped conductor (18) and an end conductor (17).
5. Fan hybrid brake disc according to claim 2, characterized in that the brake disc body (4) further comprises a central connection portion (9) and a mechanical brake portion (7), the central connection portion (9) being provided with a central hole (10), the brake disc being arranged radially outwards from the central hole (10) in sequence as a central connection portion (9), an eddy current brake portion (8) and a mechanical brake portion (7).
6. A fan assembly comprising a fan hybrid brake rotor according to any one of claims 1 to 5.
7. The fan unit according to claim 6, further comprising a drive shaft and an excitation assembly (5), wherein the brake disc is arranged around the drive shaft, and wherein a mechanical air gap is present between the excitation assembly (5) and the eddy current brake part (8).
8. The fan assembly according to claim 7, characterized in that the field assembly (5) comprises a field core (13) and a field winding (16), the field core (13) comprising a yoke (14) and an even number of teeth (15); the tooth parts (15) are fixed on the yoke parts (14), the exciting windings (16) are respectively wound on each tooth part (15), the yoke parts (14) are arranged at one ends of the tooth parts (15) which are far away from the eddy current braking parts (8), and a mechanical air gap exists between the tooth parts (15) and the eddy current braking parts (8).
9. Fan unit according to claim 8, further comprising a mechanical caliper (2), said mechanical caliper (2) being adapted to a mechanical brake (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310766151.7A CN116792431A (en) | 2023-06-26 | 2023-06-26 | Fan hybrid brake disc and fan unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310766151.7A CN116792431A (en) | 2023-06-26 | 2023-06-26 | Fan hybrid brake disc and fan unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116792431A true CN116792431A (en) | 2023-09-22 |
Family
ID=88047847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310766151.7A Pending CN116792431A (en) | 2023-06-26 | 2023-06-26 | Fan hybrid brake disc and fan unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116792431A (en) |
-
2023
- 2023-06-26 CN CN202310766151.7A patent/CN116792431A/en active Pending
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