CN114658773B - Mixed excitation magnetic rail brake - Google Patents
Mixed excitation magnetic rail brake Download PDFInfo
- Publication number
- CN114658773B CN114658773B CN202210239828.7A CN202210239828A CN114658773B CN 114658773 B CN114658773 B CN 114658773B CN 202210239828 A CN202210239828 A CN 202210239828A CN 114658773 B CN114658773 B CN 114658773B
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- CN
- China
- Prior art keywords
- magnetic
- magnetic conduction
- permanent magnet
- frame
- fixing frame
- 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.)
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Links
- 230000005284 excitation Effects 0.000 title claims abstract description 26
- 230000005389 magnetism Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000004020 conductor Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/002—Brakes with direct electrical or electro-magnetic actuation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H7/00—Brakes with braking members co-operating with the track
- B61H7/02—Scotch blocks, skids, or like track-engaging shoes
- B61H7/04—Scotch blocks, skids, or like track-engaging shoes attached to railway vehicles
- B61H7/06—Skids
- B61H7/08—Skids electromagnetically operated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a mixed excitation magnetic rail brake, and belongs to the field of high-speed rail brakes. The magnetic shielding device comprises a shell, a magnetic conduction cover, a permanent magnet, a fixing frame, a magnetic shielding plate, a coil, a magnetic conduction frame, a wearing plate and a wearing magnetic shielding plate, wherein the magnetic conduction cover is arranged in the shell, the permanent magnet is arranged in the magnetic conduction cover, the fixing frame is arranged at the lower part of the magnetic conduction cover, the magnetic conduction cover and the fixing frame wrap the two poles of the permanent magnet and are connected with the magnetic conduction frame, the magnetic shielding plate is further arranged on the fixing frame, the magnetic conduction frame is connected below the magnetic conduction cover, the magnetic shielding plate and the fixing frame, the coil is wound outside the magnetic conduction frame, the wearing plate is connected below the magnetic conduction frame, the wearing plate seals an opening of the shell, the magnetic shielding wearing plate is arranged between the two wearing plates, the guide rail is arranged below the wearing plate, and the magnetic conduction cover and the fixing frame can fully gather a magnetic field and transmit the magnetic field to the guide rail through the magnetic conduction frame. The invention has compact and simple structure, does not need a motor, an air cylinder, a hydraulic cylinder and the like to adjust the posture position of the permanent magnet, has large braking moment and is convenient to use and operate.
Description
Technical Field
The invention relates to the technical field of high-speed railway brakes, in particular to a mixed excitation magnetic rail brake.
Background
The mixed excitation magnetic rail brake is used as a high-speed rail brake device, when the mixed excitation magnetic rail brake is in a working state, a coil is electrified to enable a magnetic conduction frame to generate a magnetic field in the same direction as a permanent magnet, the magnetic field is driven to pass through air between a wearing plate and a guide rail to form a closed loop with the guide rail, so that the mixed excitation magnetic rail brake is attracted onto the magnetic rail, and friction force generated by the wearing plate and the guide rail brakes the high-speed rail. The high-speed rail converts kinetic energy of the high-speed rail into heat energy to consume in a friction heat generation mode of the mixed excitation magnetic rail brake, so that a speed reduction braking effect is achieved.
The invention patent application number 201310057696.7 discloses a permanent magnet magnetic rail brake of a railway vehicle and a braking method, wherein the permanent magnet magnetic rail brake comprises n braking blocks longitudinally arranged along a rail, each single braking block comprises a permanent magnet magnetized along the transverse horizontal direction of the rail, two first iron blocks, two non-magnetic side covers and a moving shaft, an oil cavity is formed in the non-magnetic side plate on one side, a space between the oil cavity and the two braking shoes and the permanent magnet forms a closed cavity, a horizontal moving shaft formed by connecting two identical second iron blocks, an aluminum plate and two identical pistons is arranged in the closed cavity, and the moving shaft moves to the state that the two second iron blocks are transversely aligned with the two first iron blocks respectively to form a magnetic loop, so that braking is realized; the movable shaft moves to the position that the right end piston and the second iron block are positioned in the oil cavity, the permanent magnet is magnetically shielded, and the braking is released; the brake is divided into a plurality of sections, the abrasion degree of each section of brake shoe is almost the same, the braking performance is good, the linear movement type arrangement mode is adopted, the operation is easy, and the control is more accurate. However, the permanent magnet magnetic track brake needs to be additionally provided with a power device for pushing and pulling the electromagnet, and has a complex structure.
The invention patent with the application number of 201210467202.8 discloses a permanent magnet and electromagnetic composite working magnetic rail brake, a rotating shaft comprises two half shafts and a second permanent magnet, the two half shafts made of magnetic conductive materials are oppositely arranged, an axially through groove is reserved in the middle of the rotating shaft, the second permanent magnet with the same size as the through groove is embedded in the through groove, a bracket structure comprises side plates made of the magnetic conductive materials at the front side and the rear side and a middle partition plate made of non-magnetic conductive materials fixedly connected with the two side plates, the rotating shaft is arranged below the middle partition plate, an axially through groove is formed between the two side plates and the upper part of the middle partition plate, a first permanent magnet with the same size as the groove is placed in the groove, a coil is sleeved on the upper parts of the side plates at the two sides, and the lower parts of the side plates are connected with pole shoes; the reverse torque during rotation of the rotating shaft is effectively reduced by controlling the current and the direction in the coil; after stable operation, the current can be disconnected; when additional braking force is needed, a mode of electromagnetic and permanent magnetic composite braking is adopted, so that the braking effect is further enhanced. The magnetic rail brake with the combination of permanent magnet and electromagnetism needs to be additionally provided with a power device for rotating the permanent magnet, and has a complex structure. In addition, a part of the permanent magnet, which is not covered by the half shaft, of the permanent magnet and electromagnetic composite working magnetic rail brake can generate a closed loop with the permanent magnet to form magnetic leakage, so that the braking moment is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a mixed excitation magnetic rail brake which has a simple and compact overall structure, does not need a motor, an air cylinder, a hydraulic cylinder and the like to adjust the posture position of a permanent magnet, has large braking moment and is convenient to use and operate.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a mixed excitation magnetic rail brake comprises a shell, a magnetic conduction cover, at least one permanent magnet, a fixing frame, a magnetic isolation plate, a coil, a magnetic conduction frame, a wearing plate and a magnetic isolation wearing plate; the shell is connected with the hydraulic push-pull device, the opening of the shell faces the guide rail, the shell is made of non-magnetic conduction materials, a magnetic conduction cover is arranged in the shell, a permanent magnet is arranged in the magnetic conduction cover, a fixing frame is arranged at the lower part of the magnetic conduction cover, the magnetic conduction cover and the fixing frame wrap the two poles of the permanent magnet and are connected with the magnetic conduction frame, a magnetic isolation plate is further arranged on the fixing frame, the magnetic isolation plate is arranged at the junction of the N pole and the S pole of the permanent magnet and is used for preventing the permanent magnet from leaking magnetic flux, the magnetic conduction frame is connected with the magnetic conduction cover, the magnetic isolation plate is connected with the lower part of the fixing frame, the fixing frame is made of magnetic conduction materials, the coil is wound outside the magnetic conduction frame, the lower part of the fixing frame is provided with a first groove, the upper part of the coil is embedded in the first groove, the lower part of the coil is embedded in the second groove, the lower part of the coil is connected with two abrasion plates, the two abrasion plates are connected with the lower surface of the magnetic conduction frame, the two abrasion plates are connected with the shell through the connecting the shell, the two abrasion plates are connected with the two abrasion plates, the abrasion plates are connected with the two abrasion plates, and the abrasion plates are connected with the abrasion plates, and the abrasion plates are arranged between the abrasion plates and the abrasion plates are connected with the abrasion plates and the abrasion plates are fully connected through the abrasion plates.
Preferably, an air hole for radiating heat from the coil is provided in the case.
Preferably, the shell is made of stainless steel materials, an inner rib for preventing the permanent magnet from generating self magnetic leakage is arranged in the shell, and the inner rib is arranged at the junction of the N pole and the S pole of the permanent magnet.
Preferably, the inner wall of the magnetic conduction cover is an inclined wall matched with the magnetic field distribution.
Preferably, the magnetic conduction cover, the magnetic conduction frame and the fixing frame are made of low carbon steel materials.
Preferably, the magnetism isolating wearing plates are made of stainless steel materials, and the magnetism isolating wearing plates are welded between the two wearing plates.
Drawings
FIG. 1 is a front view of a hybrid excitation magnetic rail brake of the present invention;
FIG. 2 is a left side view of a hybrid excitation magnetic rail brake of the present invention;
FIG. 3 is a cross-sectional view of A-A of the present invention;
FIG. 4 is a three-dimensional view of the present invention;
FIG. 5 is a magnetic circuit diagram in operation;
FIG. 6 is a magnetic circuit diagram before lifting the hybrid excitation rail brake;
FIG. 7 is a magnetic circuit diagram of the guide rail as it exits the brake;
reference numerals: 1. a housing; 2. a magnetic conductive cover; 3. a permanent magnet; 4. a fixing frame; 5. a magnetism isolating plate; 6. a coil; 7. a guide rail; 8. a magnetic conduction frame; 9. a wear plate; 10. a magnetism isolating wearing plate; 11. and (5) a bolt.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
As shown in fig. 1-4, the hybrid excitation magnetic track brake comprises a shell 1, a magnetic conduction cover 2, a permanent magnet 3, a fixing frame 4, a magnetism isolating plate 5, a coil 6, a magnetism isolating frame 8, a wearing plate 9 and a magnetism isolating wearing plate 10; the housing 1 is connected with a hydraulic push-pull device. The hydraulic push-pull device installs the mixed excitation magnetic rail brake on the high-speed rail, and the friction force generated between the abrasion plate 9 and the guide rail 7 brakes the high-speed rail through the strong suction force generated by the abrasion plate 9 to the guide rail 7.
As shown in fig. 3, the opening of the casing 1 faces the guide rail 7, and the casing 1 is made of non-magnetic conductive materials, so that the magnetic field generated by the hybrid excitation magnetic track brake can be effectively prevented from leaking outwards. The magnetic conduction cover 2 is arranged in the shell 1, the permanent magnet 3 is arranged in the magnetic conduction cover 2, the fixing frame 4 is arranged at the lower part of the magnetic conduction cover 2, and the magnetic conduction cover 2 and the fixing frame 4 wrap the two poles of the permanent magnet 3 and are connected with the magnetic conduction frame 8. The magnetic conduction cover 2, the magnetic conduction frame 8 and the fixing frame 4 are made of low carbon steel magnetic conduction materials, and the magnetic conduction cover 2 and the fixing frame 4 almost completely wrap the two poles of the permanent magnet 3 to play a role of magnetic conduction and magnetic concentration.
The fixing frame 4 is also provided with a magnetism isolating plate 5, and the magnetism isolating plate 5 is made of non-magnetic stainless steel materials. The magnetism isolating plate 5 is arranged at the junction of the N pole and the S pole of the permanent magnet 3. The inner ribs and the magnetism isolating plate 5 arranged above the inner part of the shell 1 are designed at the junction of the N pole and the S pole in the middle of the permanent magnet, and play roles in fixing the whole structure and preventing the permanent magnet 3 from generating self magnetic leakage.
The magnetic conduction frame 8 is connected below the magnetic conduction cover 2, the magnetic isolation plate 5 and the fixing frame 4. The fixing frame 4 is made of magnetic conduction materials, and the coil 6 is wound outside the magnetic conduction frame 8. A first groove is arranged at the lower part of the fixing frame 4, and the upper part of the coil 6 is embedded in the first groove. A second groove is arranged at the lower part of the magnetic conduction frame 8, and the lower part of the coil 6 is embedded in the second groove. Two wearing plates 9 are connected below the magnetic conduction frame 8, and the two wearing plates 9 are connected at the opening of the shell 1 through bolts 11 and close the opening of the shell 1. Two wearing plates 9 are installed on the shell 1 through the connection of bolts 11, and the structure is simple and the sealing performance is good. The housing 1 has air holes for dissipating heat from the coil 6.
A magnetism isolating wearing plate 10 is welded between the two wearing plates 9. The magnetism isolating wearing plate 10 is made of non-magnetic stainless steel, and can isolate the magnetic fields of the two wearing plates 9 and the friction guide rail 7 to generate braking force. The guide rail 7 is arranged below the two wear plates 9 and the magnetism isolating wear plate 10. The magnetic conduction cover 2 and the fixing frame 4 almost completely wrap the two poles of the permanent magnet 3 and are connected with the magnetic conduction frame 8. The magnetic conduction cover 2 and the fixing frame 4 are made of magnetic conduction materials such as low carbon steel. The magnetic conduction cover 2 and the fixing frame 4 almost completely wrap the two poles of the permanent magnet 3 and are connected with the magnetic conduction frame 8. The magnetic conduction cover 2 and the fixing frame 4 can fully gather the magnetic field generated by the permanent magnet 3 and transmit the magnetic field to the guide rail 7 through the magnetic conduction frame 8.
The inner wall of the magnetic conduction cover 2 is made into an inclined wall, and the structure not only can be fully matched with the magnetic field distribution, but also can increase the volume of the permanent magnet 3, thereby increasing the attraction between the mixed excitation magnetic track brake and the magnetic track.
In the working state, the coil 6 is electrified, the magnetic conduction frame 8 generates a magnetic field in the same direction as the permanent magnet 3, and the magnetic field is driven to form a closed loop with the guide rail 7 through an air gap, as shown in fig. 5, so that suction force is generated on the guide rail 7. The friction between the guide rail 7 and the wear plate 9 is increased during the track braking. When stopping braking, the coil 6 is electrified with reverse current, the magnetic field generated by the permanent magnet 3 is completely attracted by the electromagnet through the magnetic conduction cover 2 and the fixing frame 4 to form a closed magnetic field together with the magnetic conduction frame 8, and the magnetic field does not pass through the guide rail 7, as shown in fig. 6. The hydraulic push-pull device can thus easily lift the hybrid excitation rail brake off the guide rail 7.
In the non-working state, the coil 6 is not electrified, and the magnetic resistance of the air is far greater than that of the magnetic conductive materials such as low carbon steel, so that the magnetic field generated by the permanent magnet 3 is transmitted to the magnetic conductive frame 8 through the magnetic conductive cover 2 and the fixing frame 4 to form a closed loop. The hybrid excitation rail brake is pulled up a distance from the guide rail 7 as shown in fig. 7.
According to the invention, the posture or position of the permanent magnet 3 does not need to be adjusted by a motor, an air cylinder, a hydraulic cylinder and the like, and the magnetic circuit of the permanent magnet 3 can be changed by only changing the electrified state of the coil 6. Meanwhile, the magnetic field generated after the coil 6 is electrified can enhance the braking effect of the hybrid excitation magnetic rail brake. Compared with the traditional permanent magnet track brake, the invention saves the position or the gesture of the permanent magnet 3 adjusted by the transmission devices such as a motor, an air cylinder, a hydraulic cylinder and the like, and saves space.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (6)
1. The mixed excitation magnetic rail brake is characterized by comprising a shell, a magnetic conduction cover, at least one permanent magnet, a fixing frame, a magnetic isolation plate, a coil, a magnetic conduction frame, a wearing plate and a magnetic isolation wearing plate; the shell is connected with the hydraulic push-pull device, the opening of the shell faces the guide rail, the shell is made of non-magnetic conduction materials, a magnetic conduction cover is arranged in the shell, a permanent magnet is arranged in the magnetic conduction cover, a fixing frame is arranged at the lower part of the magnetic conduction cover, the magnetic conduction cover and the fixing frame wrap the two poles of the permanent magnet and are connected with the magnetic conduction frame, a magnetic isolation plate is further arranged on the fixing frame, the magnetic isolation plate is arranged at the junction of the N pole and the S pole of the permanent magnet and is used for preventing the permanent magnet from leaking magnetic flux, the magnetic conduction frame is connected with the magnetic conduction cover, the magnetic isolation plate is connected with the lower part of the fixing frame, the fixing frame is made of magnetic conduction materials, the coil is wound outside the magnetic conduction frame, the lower part of the fixing frame is provided with a first groove, the upper part of the coil is embedded in the first groove, the lower part of the coil is embedded in the second groove, the lower part of the coil is connected with two wear plates, the two wear plates are connected with the lower part of the magnetic conduction frame, the two wear plates are connected with the magnetic isolation plate through the shell, the wear plates are connected with the two wear plates, and the wear plates are connected with the wear plates, and the wear plates are fully and sealed by the wear plates.
2. A hybrid excitation magnetic rail brake according to claim 1, characterized in that air holes for heat dissipation of the coils are provided in the housing.
3. The mixed excitation magnetic rail brake of claim 1, wherein the housing is made of stainless steel material, an inner rib for preventing the permanent magnet from generating self magnetic leakage is arranged in the housing, and the inner rib is arranged at the junction of the N pole and the S pole of the permanent magnet.
4. The hybrid excitation magnetic rail brake of claim 1, wherein the inner wall of the magnetically permeable cover is a sloped wall matching the magnetic field distribution.
5. The hybrid excitation magnetic rail brake of claim 1, wherein the magnetically permeable cover, the magnetically permeable frame and the fixed frame are made of a low carbon steel material.
6. The hybrid excitation magnetic rail brake of claim 1, wherein the magnetism isolating wear plates are made of stainless steel material, and the magnetism isolating wear plates are welded between the two wear plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239828.7A CN114658773B (en) | 2022-03-12 | 2022-03-12 | Mixed excitation magnetic rail brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239828.7A CN114658773B (en) | 2022-03-12 | 2022-03-12 | Mixed excitation magnetic rail brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114658773A CN114658773A (en) | 2022-06-24 |
| CN114658773B true CN114658773B (en) | 2024-02-06 |
Family
ID=82029066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210239828.7A Active CN114658773B (en) | 2022-03-12 | 2022-03-12 | Mixed excitation magnetic rail brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114658773B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811444A (en) * | 2010-04-23 | 2010-08-25 | 浙江大学 | Hybrid vortex rail braking system |
| CN101814821A (en) * | 2010-04-23 | 2010-08-25 | 浙江大学 | Hybrid excitation structure |
| CN104015752A (en) * | 2014-06-10 | 2014-09-03 | 青岛四方车辆研究所有限公司 | Split pole shoe provided with interlayer and used for magnetic rail brake |
| CN104494635A (en) * | 2014-11-24 | 2015-04-08 | 上海庞丰交通设备科技有限公司 | Single magnetic type permanent magnet track braking device |
-
2022
- 2022-03-12 CN CN202210239828.7A patent/CN114658773B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811444A (en) * | 2010-04-23 | 2010-08-25 | 浙江大学 | Hybrid vortex rail braking system |
| CN101814821A (en) * | 2010-04-23 | 2010-08-25 | 浙江大学 | Hybrid excitation structure |
| CN104015752A (en) * | 2014-06-10 | 2014-09-03 | 青岛四方车辆研究所有限公司 | Split pole shoe provided with interlayer and used for magnetic rail brake |
| CN104494635A (en) * | 2014-11-24 | 2015-04-08 | 上海庞丰交通设备科技有限公司 | Single magnetic type permanent magnet track braking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114658773A (en) | 2022-06-24 |
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