CN117175889B - Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling - Google Patents
Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling Download PDFInfo
- Publication number
- CN117175889B CN117175889B CN202311456081.1A CN202311456081A CN117175889B CN 117175889 B CN117175889 B CN 117175889B CN 202311456081 A CN202311456081 A CN 202311456081A CN 117175889 B CN117175889 B CN 117175889B
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- conductor cylinder
- spring
- spline shaft
- braking torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 38
- 239000004020 conductor Substances 0.000 claims abstract description 84
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 abstract description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 15
- 235000017491 Bambusa tulda Nutrition 0.000 description 15
- 241001330002 Bambuseae Species 0.000 description 15
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 15
- 239000011425 bamboo Substances 0.000 description 15
- 230000017525 heat dissipation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 241000883990 Flabellum Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- -1 neodymium-iron-boron rare earth Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
Classifications
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the technical field of auxiliary braking of heavy-duty vehicles, and relates to a permanent-magnet retarder capable of automatically adjusting braking torque by air cooling, which comprises the following components: the stator comprises a first conductor cylinder and a conductor cylinder bracket fixed to the vehicle, wherein the first conductor cylinder is nested in the conductor cylinder bracket; the transmission shaft comprises an external spline shaft and a spring; the outer spline shaft passes through the first conductor cylinder, a gap capable of accommodating the permanent magnet rotor is reserved between the outer spline shaft and the first conductor cylinder, and the spring is sleeved on the outer spline shaft; the permanent magnet rotor is sleeved on the external spline shaft and can move into the gap along the axial direction of the external spline shaft and resist against the spring. The permanent magnet rotor has the advantages that the depth of the permanent magnet rotor entering the stator can be automatically adjusted according to the braking acceleration of the vehicle and the forward tilting angle of the vehicle body, so that the braking torque can be automatically adjusted.
Description
Technical Field
The invention relates to the technical field of auxiliary braking of heavy-duty vehicles, in particular to a permanent-magnet retarder capable of automatically adjusting braking torque by air cooling.
Background
When a vehicle passes through a mountain region, the condition of remote braking exists, and the traditional braking system can cause the problems of overheating, declining, abrasion, even failure and the like of the braking system due to long-time braking, so that the vehicle has traffic accidents. In the long-distance transportation driving process, frequent stepping on the brake pedal can also increase the fatigue degree of the driver and reduce the driving safety. GB7258 regulations issued by the traffic department in 1997 on technical conditions for safety of motor vehicle operation clearly specify: in order to ensure road safety, trucks and dangerous goods transportation vehicles of more than 12 tons must be forcibly provided with auxiliary braking devices.
The retarder is one of auxiliary braking devices and is mainly applied to vehicles running in mountain areas. Currently, the retarder in the market can be classified into a hydraulic retarder, an electromagnetic retarder, a permanent magnetic retarder and the like. The existing retarder works by mechanical control, namely a manual control device is arranged in a cab, and a corresponding executive element is arranged at the retarder end to realize the control function of the retarder. And the hydraulic retarder controls the oil flowing into the working cavity through the control valve so as to regulate the retarder to output braking torque, correspondingly, more cooling systems, pumps and valves are needed to realize the function of the retarder, the whole machine and the control system have complex structure, difficult installation and poor reliability. The electromagnetic retarder needs an additional power supply system to work normally, is complex in structure, and generates joule heat when the electromagnetic exciting coil generates a magnetic field, so that the heat dissipation difficulty of the system is increased. The existing permanent-magnet retarder usually uses pneumatic, hydraulic or motor as an executing component to realize the adjustment of the braking moment of the retarder, and has the advantages of a large number of components, complex connection structure and low reliability.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides an air-cooled permanent magnet retarder capable of automatically adjusting braking torque, which solves the technical problems that an existing retarder is complex in structure and cannot automatically adjust braking torque.
Technical proposal
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
in a first aspect, the present invention provides a permanent magnet retarder for automatically adjusting a braking torque by air cooling, comprising: the stator comprises a first conductor cylinder and a conductor cylinder bracket fixed to the vehicle, wherein the first conductor cylinder is nested in the conductor cylinder bracket; the transmission shaft comprises an external spline shaft and a spring; the outer spline shaft passes through the first conductor cylinder, a gap capable of accommodating the permanent magnet rotor is reserved between the outer spline shaft and the first conductor cylinder, and the spring is sleeved on the outer spline shaft; the permanent magnet rotor is sleeved on the external spline shaft and can move into the gap along the axial direction of the external spline shaft and resist against the spring.
According to the permanent magnet retarder capable of automatically adjusting braking torque through air cooling, disclosed by the technical scheme of the invention, through improving the transmission shaft of the existing vehicle, the stator and the permanent magnet rotor are sleeved on the transmission shaft, and the permanent magnet rotor can move into the stator along the axial direction of the transmission shaft. When the vehicle generates braking acceleration or the vehicle body tilts forwards, the permanent magnet rotor automatically moves relative to the transmission shaft and stretches into the stator to automatically realize mechanical automatic auxiliary braking. And the permanent magnet rotor can be matched with the spring, and the depth of the permanent magnet rotor entering the stator can be automatically adjusted according to the braking acceleration of the vehicle and the forward tilting angle of the vehicle body, so that the automatic adjustment of the braking torque is realized.
Optionally, the permanent magnet retarder further comprises: a heat radiation fan arranged at one side of the first conductor cylinder; the cooling fan comprises cooling fan blades, a needle bearing and a second conductor cylinder; the needle bearing outer ring is inlaid on the conductor cylinder bracket; the second conductor cylinder is sleeved in the conductor cylinder bracket and is used for fixedly connecting the needle bearing inner ring with the cooling fan blade.
And the permanent magnet retarder in the working process is radiated by the radiating fan. When the permanent magnet rotor stretches into the stator, eddy current is generated between the permanent magnet and the second conductor cylinder, the second conductor cylinder is driven to rotate, and then the second conductor cylinder drives the cooling fan blade to rotate, so that the permanent magnet retarder is cooled. Therefore, parts such as water cooling and heat dissipation are omitted, and the structure is further simplified.
Optionally, the radiator fan blade is cast from brass, and the radiator fan blade length is 50mm. Through restriction to radiator fan blade material and length, guarantee radiator fan's radiating effect under the prerequisite of guaranteeing radiator fan durability.
Optionally, the outer fan blade is arranged corresponding to the outer side wall of the conductor cylinder bracket to radiate heat for the outer side wall of the conductor cylinder bracket; the inner fan blade is arranged corresponding to a gap between the first conductor cylinder and the external spline shaft and dissipates heat in the gap. The outside of conductor section of thick bamboo support is supplied air through outer flabellum, cools down conductor section of thick bamboo support outside, also supplies air to the inside of first conductor section of thick bamboo through interior mountain to cool down the inside of first conductor section of thick bamboo, so that realized need not to set up the cooling system that the structure is complicated, just can realize the heat dissipation cooling of permanent magnetism retarber.
Optionally, heat dissipation fins are arranged on the outer side of the conductor cylinder support along the circumferential direction. Through set up radiating fin in the conductor section of thick bamboo support outside, increase the surface area of conductor section of thick bamboo support to the realization is cooled down the conductor section of thick bamboo support fast through cooling down radiating fin.
Optionally, the permanent magnet rotor comprises an internal spline iron yoke, a permanent magnet and a carbon fiber sheath; the inner spline iron yoke is sleeved on the outer spline shaft; the permanent magnet is embedded in a tooth slot of the internal spline iron yoke; the carbon fiber sheath is sleeved on the outer side of the internal spline iron yoke and used for fixing the permanent magnet on the internal spline iron yoke. The permanent magnet is just embedded into the tooth socket of the internal spline iron yoke so as to be convenient to fix. Further fixing is carried out on the outer side of the inner spline iron yoke through a carbon fiber sheath. Besides the fixing effect, the carbon fiber sheath has light weight and high strength, does not influence the magnetic field, does not generate vortex, and therefore does not increase the temperature rise of the permanent magnet.
Optionally, the permanent magnets are sector rare earth permanent magnets, the permanent magnets are magnetized along the circumferential direction, and the magnetic poles of the adjacent permanent magnets are opposite in direction, so that the magnetism-gathering permanent magnet rotor is formed.
Optionally, the transmission shaft further includes: the permanent magnet rotor stop block and the spring stop block are respectively fixed on the external spline shaft through screws; the permanent magnet stop block is arranged at one side of the permanent magnet far away from the spring; the spring stop block is arranged on one side of the spring far away from the permanent magnet. The permanent magnet and the spring are limited by arranging the permanent magnet stop block and the spring stop block on the transmission shaft, so that the movable range of the permanent magnet and the spring on the transmission shaft is limited.
Optionally, the spring is a compression spring with end portions that are tight and ground flat.
The end portion is ground flat tightly meaning that the half turn spiral is eliminated, making the spring end a nearly closed ring (similar to a round spring washer or key ring on a key chain). The function is to enlarge the contact area between the spring and the end part, so that the spring generates no torsion of the spring axis as much as possible in the working elastic range, the reverse extension line of the acting force direction passes through the center line of the spring, and in addition, a good sliding contact surface is provided for the compression rotation (top surface or low surface) of the spring (one point contact can not slide due to the concentrated pressure, so that the radial diameter of the spring is increased and deformed).
Advantageous effects
The beneficial effects of the invention are as follows: the invention relates to an air-cooled permanent magnet retarder capable of automatically adjusting braking torque, which is directly improved based on a transmission shaft of an existing vehicle and further comprises a stator, a permanent magnet rotor and the like, wherein the stator and the permanent magnet rotor are sleeved on the transmission shaft, and the stator is fixed with a vehicle body. When the vehicle generates braking acceleration or the vehicle body tilts forwards, the permanent magnet rotor automatically moves relative to the transmission shaft and stretches into the stator to automatically realize mechanical automatic auxiliary braking. And the permanent magnet rotor can automatically adjust the depth of entering the stator according to the braking acceleration of the vehicle and the forward tilting angle of the vehicle body so as to realize the automatic adjustment of the braking torque.
In addition, the invention is also provided with a cooling fan aiming at the combined part of the stator and the permanent magnet rotor, and the cooling fan dissipates heat of the permanent magnet retarder in the working process, so that parts such as water cooling and heat dissipation are omitted, and the structure is further simplified.
In summary, compared with the related prior art, the permanent magnet retarder omits components such as a control system and water cooling heat dissipation, greatly simplifies the structure, realizes automatic control of output torque, and improves usability of the permanent magnet retarder.
Drawings
Fig. 1 is a schematic exploded structural view of a permanent magnet retarder with air-cooled automatic braking torque adjustment according to an embodiment of the present invention;
fig. 2 is a side view of a permanent magnet retarder with air-cooled automatic braking torque adjustment according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic structural diagram of a permanent-magnet retarder with air-cooled automatic braking torque adjustment in another retarding state according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a permanent magnet retarder in a retarding state with automatic braking torque adjustment by air cooling according to an embodiment of the present invention.
[ reference numerals description ]
1: permanent magnet rotor stop blocks;
2: a permanent magnet;
3: a carbon fiber sheath;
4: an internally splined iron yoke;
41: an internal spline yoke tooth slot;
5: an external spline shaft;
61: a first conductor barrel;
62: a second conductor barrel;
7: a conductor cylinder bracket;
8: a spring;
9: needle roller bearings;
10: a radiator fan blade;
11: and a spring stop.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1 and 2, the present embodiment provides a permanent-magnet retarder for automatically adjusting braking torque by air cooling, including: the stator includes a first conductor tube 61 and a conductor tube holder 7 fixed to the vehicle, the first conductor tube 61 being nested within the conductor tube holder 7. The transmission shaft comprises an external spline shaft 5 and a spring 8. The external spline shaft 5 passes through the first conductor cylinder 61, a gap capable of containing the permanent magnet rotor is reserved between the external spline shaft 5 and the first conductor cylinder 61, and the spring 8 is sleeved on the external spline shaft 5. The permanent magnet rotor is sleeved on the external spline shaft 5 and can move into the gap along the axial direction of the external spline shaft 5 and resist the spring.
According to the permanent magnet retarder capable of automatically adjusting braking torque through air cooling, disclosed by the technical scheme of the invention, through improving the transmission shaft of the existing vehicle, the stator and the permanent magnet rotor are sleeved on the transmission shaft, and the permanent magnet rotor can move into the stator along the axial direction of the transmission shaft. When the vehicle generates braking acceleration or the vehicle body tilts forwards, the permanent magnet rotor automatically moves relative to the transmission shaft and stretches into the stator to automatically realize mechanical automatic auxiliary braking. And the permanent magnet rotor can be matched with the spring 8, and the depth of the permanent magnet rotor entering the stator can be automatically adjusted according to the braking acceleration of the vehicle and the forward tilting angle of the vehicle body, so that the automatic adjustment of the braking torque is realized. In summary, the permanent-magnet retarder provided in this embodiment changes the conventional arrangement of the control system in the related art, realizes automatic control of braking torque through mutual cooperation of mechanical structures, simplifies the structure, reduces difficulty in production and manufacturing, is simple to install, and improves usability of the device.
The length and the connection mode of the external spline shaft 5 can be modified on the original transmission system. When the modified external spline shaft 5 is not parallel to the car body, a base with a corresponding angle is added at the conductor cylinder bracket 7 for adjustment, so that the axial direction of the base is kept concentric with the axial direction of the permanent magnet rotor.
Further, the material of the first conductor cylinder 61 is industrial pure copper.
Optionally, as shown in fig. 3, the permanent-magnet retarder further includes: the heat radiation fan is provided on one side of the first conductor tube 61. The radiator fan includes a radiator fan blade 10, a needle bearing 9, and a second conductor cylinder 62. The outer ring of the needle bearing 9 is embedded on the conductor cylinder bracket 7. The second conductor cylinder 62 is sleeved in the conductor cylinder bracket 7 and is used for fixedly connecting the inner ring of the needle bearing 9 with the cooling fan blade 10.
And the permanent magnet retarder in the working process is radiated by the radiating fan. When the permanent magnet rotor stretches into the stator, eddy current is generated between the permanent magnet 2 and the second conductor cylinder 62, the second conductor cylinder 62 is driven to rotate, and then the second conductor cylinder 62 drives the cooling fan blade 10 to rotate, so that the permanent magnet retarder is cooled. Therefore, parts such as water cooling and heat dissipation are omitted, and the structure is further simplified.
Alternatively, the radiator fan blade 10 is cast from brass, and the radiator fan blade 10 has a length of 50mm. By limiting the material and the length of the cooling fan blade 10, the cooling effect of the cooling fan is ensured on the premise of ensuring the durability of the cooling fan.
Wherein the fan blade is brass of copper zinc alloy.
Optionally, the fan blade includes an outer blade and an inner blade. The outer fan blades are arranged corresponding to the outer side wall of the conductor cylinder bracket 7 and radiate heat for the household outer side wall of the conductor cylinder 7. The inner fan blades are arranged corresponding to the gap between the first conductor barrel 61 and the external spline shaft 5, and radiate heat to the gap. When the permanent magnet rotor extends into the second conductor cylinder 62, an eddy current is generated between the permanent magnet rotor and the second conductor cylinder 62 to drive the second conductor cylinder 62 to rotate the fan blade. The outside of conductor section of thick bamboo support 7 is supplied air through outer flabellum, cools down conductor section of thick bamboo support 7 outside, also supplies air to the inside of first conductor section of thick bamboo 61 through interior mountain to cool down the inside of first conductor section of thick bamboo 61, so that realized need not to set up the cooling system that the structure is complicated, just can realize the heat dissipation cooling of permanent-magnet retarder.
Optionally, the outside of the conductor cylinder bracket 7 is provided with heat radiating fins in the circumferential direction. Through set up radiating fin in conductor section of thick bamboo support 7 outside, increase the surface area of conductor section of thick bamboo support 7 to the realization is cooled down conductor section of thick bamboo support 7 fast through cooling down radiating fin.
Optionally, screw holes are further formed on the conductor cylinder support 7, and the screw holes are matched with screws to fix the conductor cylinder support 7 on a frame of the vehicle.
Wherein, conductor section of thick bamboo support 7 is connected with the frame of vehicle through 4M 24 screws.
Optionally, the permanent magnet rotor comprises an internally splined iron yoke 4, a permanent magnet 2 and a carbon fiber sheath 3. The internal spline iron yoke 4 is sleeved on the external spline shaft 5. The permanent magnets 2 are embedded in the internally splined yoke tooth slots 41. The carbon fiber sheath 3 is sleeved outside the internal spline iron yoke 4 and used for fixing the permanent magnet 2 on the internal spline iron yoke 4. The permanent magnet 2 is fixed by just fitting the permanent magnet 2 into the internal spline yoke slot 41. Further fixation is performed outside the internally splined yoke 4 by means of a carbon fibre sheath 3. Besides the fixing effect, the carbon fiber sheath 3 has light weight and high strength, does not influence the magnetic field, does not generate vortex, and therefore does not increase the temperature rise of the permanent magnet 2.
Optionally, the permanent magnet 2 is a sector rare earth permanent magnet 2, the permanent magnet 2 is magnetized along the circumferential direction, and the magnetic poles of the adjacent permanent magnets 2 are opposite in direction, so that the magnetism-gathering permanent magnet rotor is formed.
Wherein the permanent magnet 2 is made of neodymium-iron-boron rare earth permanent magnet material.
Optionally, the transmission shaft further comprises: the permanent magnet rotor stop block 1 and the spring stop block 11 are respectively fixed on the external spline shaft 5 through screws. The permanent magnet 2 stop is arranged on one side of the permanent magnet 2 away from the spring 8. The spring stop 11 is arranged on the side of the spring 8 remote from the permanent magnet 2. The permanent magnet 2 and the spring 8 are limited by arranging the permanent magnet 2 stop block and the spring stop block 11 on the transmission shaft, so that the movable range of the permanent magnet 2 and the spring 8 on the transmission shaft is limited.
Screw holes are formed in the permanent magnet rotor stop block 1 and the spring stop block 11, and the permanent magnet rotor stop block 1 and the spring stop block 11 are matched with screws to fix the permanent magnet 2 stop block and the spring stop block 11 on the external spline shaft 5. The stop block is fixed through the mutual matching of the screw and the screw hole, so that the fixing device is firmer and more reliable. Wherein, be provided with two M4 screw holes on permanent magnet rotor dog 1 and the spring dog 11 respectively, during the installation, use interior hexagonal M4 screw to tighten in order to fix the dog.
The positions of the permanent magnet rotor stop block 1 and the spring stop block 11 on the external spline shaft 5 can be adjusted according to the installation angle of the external spline shaft 5 on a vehicle and the working loading of the permanent magnet 2 retarder.
Alternatively, the spring 8 is a compression spring 8 that is end-tightened and ground flat.
The end portions are tightly ground down, meaning that the half turns of the spiral are eliminated, making the end of the spring 8 a nearly closed ring (similar to a round spring 8 washer or key ring on a key chain). The function is to enlarge the contact area between the spring 8 and the end, so that the spring 8 generates no axial torsion of the spring 8 as much as possible in the working elastic range, the reverse extension line of the acting force direction passes through the central line of the spring 8, and in addition, a good sliding contact surface is provided for the compression rotation (top surface or low surface) of the spring 8 (one point contact cannot slide due to the concentrated pressure, so that the radial diameter of the spring 8 is increased and deformed).
The rigidity and the load number of the spring 8 are calculated according to the actual friction coefficient and the mass measuring and calculating result of the permanent magnet rotor. The spring 8 is designed in such a way that when the vehicle is stationary horizontally, the permanent magnet rotor can be pushed out of the first conductor cylinder 61, as shown in fig. 4, and the permanent magnet rotor rotates with the external spline shaft 5 without generating a braking torque. When the vehicle reaches the set braking acceleration, the permanent magnet rotor slides into the first conductor cylinder 61 under the action of the axial force generated by the braking acceleration and the vehicle inclination, and the larger the braking acceleration and the vehicle gradient, the deeper the sliding is, and finally the full load operation state of fig. 5 is reached.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, the present invention should also include such modifications and variations provided that they come within the scope of the following claims and their equivalents.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (8)
1. An air-cooled permanent magnet retarder capable of automatically adjusting braking torque, which is characterized by comprising:
the stator comprises a first conductor cylinder and a conductor cylinder bracket fixed to the vehicle, wherein the first conductor cylinder is nested in the conductor cylinder bracket;
the transmission shaft comprises an external spline shaft and a spring; the outer spline shaft passes through the first conductor cylinder, a gap capable of accommodating the permanent magnet rotor is reserved between the outer spline shaft and the first conductor cylinder, and the spring is sleeved on the outer spline shaft;
the permanent magnet rotor is sleeved on the external spline shaft and can move into the gap along the axial direction of the external spline shaft and resist against the spring;
the permanent magnet retarder further comprises: a heat radiation fan arranged at one side of the first conductor cylinder;
the cooling fan comprises cooling fan blades, a needle bearing and a second conductor cylinder;
the needle bearing outer ring is inlaid on the conductor cylinder bracket;
the second conductor cylinder is sleeved in the conductor cylinder bracket and is used for fixedly connecting the needle bearing inner ring with the cooling fan blade.
2. An air-cooled permanent magnet retarder with automatic braking torque adjustment according to claim 1, wherein the radiator fan blades are cast from brass, and the radiator fan blades are 50mm in length.
3. The air-cooled permanent magnet retarder capable of automatically adjusting braking torque according to claim 2, wherein the fan blades comprise outer blades and inner blades;
the outer fan blades are arranged corresponding to the outer side wall of the conductor cylinder bracket and radiate heat for the outer side wall of the conductor cylinder bracket;
the inner fan blade is arranged corresponding to a gap between the first conductor cylinder and the external spline shaft and dissipates heat in the gap.
4. The permanent magnet retarder capable of automatically adjusting braking torque by air cooling according to claim 1, wherein radiating fins are arranged on the outer side of the conductor cylinder support along the circumferential direction.
5. The permanent magnet retarder capable of automatically adjusting braking torque by air cooling according to claim 1, wherein the permanent magnet rotor comprises an internal spline iron yoke, a permanent magnet and a carbon fiber sheath;
the inner spline iron yoke is sleeved on the outer spline shaft;
the permanent magnet is embedded in a tooth slot of the internal spline iron yoke;
the carbon fiber sheath is sleeved on the outer side of the internal spline iron yoke and used for fixing the permanent magnet on the internal spline iron yoke.
6. The permanent magnet retarder capable of automatically adjusting braking torque by air cooling according to claim 5, wherein the permanent magnets are sector rare earth permanent magnets, the permanent magnets are magnetized along the circumferential direction, and the magnetic pole directions of adjacent permanent magnets are opposite to form a magnetism-gathering permanent magnet rotor.
7. An air-cooled self-regulating braking torque permanent magnet retarder according to claim 1, wherein the drive shaft further comprises: the permanent magnet rotor stop block and the spring stop block are respectively fixed on the external spline shaft through screws;
the permanent magnet stop block is arranged at one side of the permanent magnet far away from the spring;
the spring stop block is arranged on one side of the spring far away from the permanent magnet.
8. An air-cooled permanent magnet retarder with automatic braking torque adjustment according to claim 1, characterized in that the springs are compression springs with tight end portions and ground flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311456081.1A CN117175889B (en) | 2023-11-03 | 2023-11-03 | Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311456081.1A CN117175889B (en) | 2023-11-03 | 2023-11-03 | Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117175889A CN117175889A (en) | 2023-12-05 |
| CN117175889B true CN117175889B (en) | 2024-01-23 |
Family
ID=88941747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311456081.1A Active CN117175889B (en) | 2023-11-03 | 2023-11-03 | Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117175889B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT169224B (en) * | 1947-07-22 | 1951-10-25 | Electro Mecanique De Laveyron | Eddy current brake |
| CA1176585A (en) * | 1979-01-12 | 1984-10-23 | Facet Enterprises, Inc. | Retarder controlled overrunning clutch with helical splines |
| WO1994028614A1 (en) * | 1993-05-21 | 1994-12-08 | Lamb Karl J | Permanent magnet coupling and transmission |
| JP2000280728A (en) * | 1999-03-31 | 2000-10-10 | Usui Internatl Ind Co Ltd | Magnet type heater |
| GB0124977D0 (en) * | 2000-10-20 | 2001-12-05 | Usui Kokusai Sangyo Kk | Magnet type fan clutch apparatus |
| JP2004072897A (en) * | 2002-08-06 | 2004-03-04 | Ckd Corp | Rotation output device with buffer mechanism |
| CN101009456A (en) * | 2007-01-19 | 2007-08-01 | 南京农业大学 | Braking moment stepless regulation permanent-magnet buffer |
| CN101719716A (en) * | 2009-11-20 | 2010-06-02 | 北京工业大学 | Permanent-magnet slide type permanent-magnet liquid-cooled retarder |
| CN101783575A (en) * | 2010-02-08 | 2010-07-21 | 北京工业大学 | Permanent magnet liquid cooling retarder for vehicle |
| CN102280146A (en) * | 2011-06-28 | 2011-12-14 | 清华大学 | Mixed retarder for high-temperature gas-cooled reactor accidental scramming |
| KR101136817B1 (en) * | 2010-10-11 | 2012-04-13 | 김선수 | Permanent magnet generator using moving type rotor |
| CN103580448A (en) * | 2013-10-21 | 2014-02-12 | 苏州科睿特能源科技有限公司 | Flexible torque transmitting device |
| CN204778533U (en) * | 2015-03-30 | 2015-11-18 | 江西工埠机械有限责任公司 | Magneto installs electric block inside |
| CN204810123U (en) * | 2015-08-14 | 2015-11-25 | 广东工业大学 | Fast derailleur for electric automobile is delayed in area |
| CN106026611A (en) * | 2016-05-17 | 2016-10-12 | 江苏理工学院 | Liquid-cooled birotor permanent magnet retarder |
| WO2018000869A1 (en) * | 2016-06-28 | 2018-01-04 | 江苏大学 | Variable-speed magnetic coupling having radially movable magnet |
| CN107707099A (en) * | 2017-09-28 | 2018-02-16 | 迈格钠磁动力股份有限公司 | A kind of cartridge type liquid cooling permanent-magnetic retarder |
| CN112311198A (en) * | 2020-11-16 | 2021-02-02 | 南京艾凌节能技术有限公司 | Sleeve type magnetic clutch |
| CN113206585A (en) * | 2021-05-14 | 2021-08-03 | 芜湖锦程永磁技术有限公司 | Integrated torque-limiting permanent magnet coupling and assembling method thereof |
-
2023
- 2023-11-03 CN CN202311456081.1A patent/CN117175889B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT169224B (en) * | 1947-07-22 | 1951-10-25 | Electro Mecanique De Laveyron | Eddy current brake |
| CA1176585A (en) * | 1979-01-12 | 1984-10-23 | Facet Enterprises, Inc. | Retarder controlled overrunning clutch with helical splines |
| WO1994028614A1 (en) * | 1993-05-21 | 1994-12-08 | Lamb Karl J | Permanent magnet coupling and transmission |
| JP2000280728A (en) * | 1999-03-31 | 2000-10-10 | Usui Internatl Ind Co Ltd | Magnet type heater |
| GB0124977D0 (en) * | 2000-10-20 | 2001-12-05 | Usui Kokusai Sangyo Kk | Magnet type fan clutch apparatus |
| JP2004072897A (en) * | 2002-08-06 | 2004-03-04 | Ckd Corp | Rotation output device with buffer mechanism |
| CN101009456A (en) * | 2007-01-19 | 2007-08-01 | 南京农业大学 | Braking moment stepless regulation permanent-magnet buffer |
| CN101719716A (en) * | 2009-11-20 | 2010-06-02 | 北京工业大学 | Permanent-magnet slide type permanent-magnet liquid-cooled retarder |
| CN101783575A (en) * | 2010-02-08 | 2010-07-21 | 北京工业大学 | Permanent magnet liquid cooling retarder for vehicle |
| KR101136817B1 (en) * | 2010-10-11 | 2012-04-13 | 김선수 | Permanent magnet generator using moving type rotor |
| CN102280146A (en) * | 2011-06-28 | 2011-12-14 | 清华大学 | Mixed retarder for high-temperature gas-cooled reactor accidental scramming |
| CN103580448A (en) * | 2013-10-21 | 2014-02-12 | 苏州科睿特能源科技有限公司 | Flexible torque transmitting device |
| CN204778533U (en) * | 2015-03-30 | 2015-11-18 | 江西工埠机械有限责任公司 | Magneto installs electric block inside |
| CN204810123U (en) * | 2015-08-14 | 2015-11-25 | 广东工业大学 | Fast derailleur for electric automobile is delayed in area |
| CN106026611A (en) * | 2016-05-17 | 2016-10-12 | 江苏理工学院 | Liquid-cooled birotor permanent magnet retarder |
| WO2018000869A1 (en) * | 2016-06-28 | 2018-01-04 | 江苏大学 | Variable-speed magnetic coupling having radially movable magnet |
| CN107707099A (en) * | 2017-09-28 | 2018-02-16 | 迈格钠磁动力股份有限公司 | A kind of cartridge type liquid cooling permanent-magnetic retarder |
| CN112311198A (en) * | 2020-11-16 | 2021-02-02 | 南京艾凌节能技术有限公司 | Sleeve type magnetic clutch |
| CN113206585A (en) * | 2021-05-14 | 2021-08-03 | 芜湖锦程永磁技术有限公司 | Integrated torque-limiting permanent magnet coupling and assembling method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 分级式永磁缓速器的设计;何仁;王晶;王亮;;重庆交通大学学报(自然科学版)(第05期) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117175889A (en) | 2023-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102594090B (en) | Liquid cooling self-excitation type eddy current retarder with salient pole structure | |
| CN106712417B (en) | Disc type permanent magnet eddy current retarder for vehicle | |
| EP1480320B1 (en) | Eddy current speed reducer | |
| CN101635501A (en) | Pre-positioning liquid cooling permanent-magnetic retarder for gear box | |
| CN108895096B (en) | A kind of permanent magnetism double disk brake and its braking method | |
| CN117175889B (en) | Permanent-magnet retarder capable of automatically adjusting braking torque through air cooling | |
| CN109058328A (en) | A kind of vehicle wheel side composite braking device of integral permanent-magnet braking and friction catch | |
| CN101783575B (en) | Permanent magnet liquid cooling retarder for vehicle | |
| CN106541835B (en) | A kind of self-excitation retarder and its control method using dual-rotor structure | |
| CN107425698B (en) | Cylindrical permanent magnet eddy current retarder for vehicle | |
| CN111106708A (en) | Hub motor for directly driving wheels of urban rail motor train | |
| CN104362828A (en) | Eddy-current air-cooling retarder of doubly-salient structure | |
| CN210437173U (en) | Electromagnetic auxiliary brake device for small car | |
| CN102611277B (en) | Liquid-cooled eddy current retarder with projecting pole structure | |
| CN107707099B (en) | Barrel type liquid cooling permanent-magnet retarder | |
| US20020020592A1 (en) | Eddy current braking apparatus | |
| CN201234202Y (en) | Pre-positioning liquid cooling permanent magnet retarder for transmission | |
| CN108832796A (en) | Vehicle deceleration magnetic speed device | |
| CN111237361B (en) | Rotary type friction and double-layer built-in permanent magnet integrated type braking device for vehicle | |
| CN110460216B (en) | Swing arm type liquid-cooled disc type permanent magnet eddy current flexible retarder for vehicle | |
| JP3519799B2 (en) | Retarders for trailers | |
| CN113890305B (en) | Liquid cooling air gap radial adjustable spherical permanent magnet eddy current retarder | |
| CN115107526A (en) | Permanent magnet eddy current retarder for vehicle | |
| CN104600954B (en) | A kind of cold current vortex retarder of self-excitation type liquid of double water channel constructions | |
| CN118264072B (en) | Rotor excitation type eddy current retarder with redundant induction power supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |