CN116653616A - Novel hybrid excitation line vortex brake and rail vehicle - Google Patents

Abstract

The invention discloses a novel hybrid excitation line eddy current brake and a rail vehicle. A group of iron cores are fixedly connected to the bottom of the beam, the iron core is provided with a supporting mechanism, the excitation coil is sleeved on the upper part of the iron core, and the inner wall of the coil is in contact with the upper part of the iron core. , the top of the excitation coil is in contact with the bottom of the beam through the support mechanism, a permanent magnet is set between the iron cores, the permanent magnet is in contact with the lower part of the iron core, the two ends of the bottom of the beam are fixedly connected with auxiliary magnetic poles, and there is a set between the auxiliary magnetic pole and the adjacent iron core Permanent magnet half body, one end of the permanent magnet half body is in contact with the auxiliary magnetic pole, and the other end is in contact with the lower part of the iron core; after the excitation coil is energized, an eddy current is generated in the rail through the magnetic circuit generated by the beam, iron core and rail, thereby The non-friction braking of the vehicle is generated between the vehicle and the rail, which overcomes the shortcomings of the existing single-energized excitation line eddy current brake, and reduces the functional weight of the brake and the excitation power while meeting the basic braking requirements. the overall cost.

Description

A New Hybrid Excitation Line Eddy Current Brake and Rail Vehicle

technical field

The invention belongs to the technical field of rail vehicle braking, and in particular relates to a novel hybrid excitation line eddy current brake and a rail vehicle.

Background technique

Linear Eddy Current Brake (LECB for short) is a kind of brake applied to rail vehicles. When the rail vehicle is braking, the linear eddy current brake sinks to a certain gap (usually 6-8mm) with the rail after being energized. A magnetic circuit is formed to generate eddy current on the rail, and at the same time, it also generates suction to the brake to brake the vehicle. The linear eddy current brake is a non-adhesive brake, which is not affected by the friction coefficient of the wheel and rail. It is a non-friction brake, green and environmentally friendly, and does not produce brake noise or brake wear particles. At the same time, linear eddy current brakes reduce rail wheel operation, maintenance and repair costs, which are very important for vehicle safety and economy. However, the prior art solutions and the linear eddy current brakes used in products on the market have the problems of heavy functional weight and high power.

Contents of the invention

In order to solve the shortcomings of the existing technology, overcome the shortcomings of the existing single energized excitation brake, and achieve the purpose of greatly reducing the weight, power consumption and cost of the linear eddy current brake and the rail vehicle, the present invention adopts the following technical solutions:

A new hybrid excitation line eddy current brake, including a beam and an excitation coil, the bottom of the beam is fixedly connected to a group of iron cores, the iron core is provided with a support mechanism, the excitation coil is sleeved on the upper part of the iron core, and the inner wall of the coil is in contact with the upper part of the iron core. The top of the exciting coil is in contact with the bottom of the beam through the support mechanism, a permanent magnet is arranged between the iron cores, and the permanent magnet is in contact with the lower part of the iron core. After the coil is energized, the magnetic field generated by the coil generates a magnetic circuit through the beam, the iron core and the rail. When the vehicle is moving, an eddy current is generated in the rail, thereby generating a braking force on the vehicle.

Further, auxiliary magnetic poles are fixedly connected to both ends of the bottom of the beam, and a permanent magnet half is provided between the auxiliary magnetic pole and the adjacent iron core. One end of the permanent magnet half is in contact with the auxiliary magnetic pole, and the other end is in contact with the lower part of the iron core. The purpose of setting auxiliary magnetic poles at both ends is to form a magnetic circuit at the ends to improve magnetic efficiency.

Further, the magnetic directions of the permanent magnets and the permanent magnet halves are arranged opposite to each other in the same polarity, forming a magnetic circuit with the iron core, the beam and the auxiliary magnetic poles. Rail vehicles generate unnecessary braking force. After the coil is energized, the pole direction of the generated magnetic field is at the top of the pole direction of the lower part of the iron core and the two adjacent permanent magnets (the ends are permanent magnet halves). The original permanent magnet and permanent magnet The magnetic circuit formed by the half body and the beam is forcibly changed by the magnetic polarity generated by the coil, so that it forms a new magnetic circuit with the rail, so that two magnetic circuits are formed on the rail: one is the magnetic circuit formed by permanent magnet excitation; the other is The magnetic circuit formed by the coil excitation effectively improves the magnetic efficiency and achieves the purpose of reducing the weight, consumption and cost of the eddy current brake.

Further, the excitation direction of the excitation coil and the magnetic pole direction of the permanent magnet and the permanent magnet half body are arranged in the same pole direction and opposite to each other.

Further, the group of iron cores is evenly arranged, so that the excitation coils on the iron cores and the permanent magnets between the iron cores are evenly arranged.

Further, the corners of the iron core are provided with iron core arc angles, and the corners of the coil outer wall of the excitation coil are matched with coil arc angles.

Further, there is a stepped surface structure between the upper and lower parts of the iron core, forming an transitional platform for the iron core to support the excitation coil.

Further, both ends of the lower part of the iron core are provided with iron core U-shaped grooves for supporting the permanent magnets or semi-permanent magnets between the iron cores, and at the same time, through the iron core U-shaped groove plane inside the iron core U-shaped grooves, The iron core is fixedly connected with the permanent magnet or the permanent magnet half body.

Further, the excitation directions of adjacent excitation coils are opposite alternately.

A rail vehicle includes a vehicle body, and the linear eddy current brake of the vehicle body is a novel hybrid excitation linear eddy current brake.

Advantage and beneficial effect of the present invention are:

A novel hybrid excitation wire eddy current brake and a rail vehicle of the present invention are arranged through the cooperation of the crossbeam, the iron core and the excitation coil. After the excitation coil is energized, the magnetic circuit generated by the crossbeam, the iron core and the rail generates an eddy current on the rail. Thus, the braking force of the vehicle is generated, the shortcomings of the existing single-energized excitation line eddy current brake are overcome, and the functional weight of the brake is reduced, the excitation power is reduced, and the overall cost is reduced under the condition that the braking performance requirements are basically met.

Description of drawings

Fig. 1 is a side view of an electric excitation line eddy current brake in the prior art.

Fig. 1a is a top view of an electric excitation line eddy current brake in the prior art.

Fig. 2 is a structural schematic diagram of a novel hybrid excitation line eddy current brake in an embodiment of the present invention.

Fig. 3 is a schematic diagram of the coil structure of the hybrid excitation brake in the embodiment of the present invention.

Fig. 4 is a schematic diagram of the arrangement of auxiliary magnetic poles of the hybrid excitation brake in the embodiment of the present invention.

Fig. 5 is a schematic diagram of the arrangement of permanent magnets and permanent magnet halves of the hybrid excitation brake in the embodiment of the present invention.

Fig. 6 is a schematic diagram of the iron core layout of the hybrid excitation brake in the embodiment of the present invention.

Fig. 7 is a schematic diagram of the magnetic circuit when the hybrid excitation brake is not working in the embodiment of the present invention.

Fig. 8 is a schematic diagram of the hybrid excitation magnetic circuit when the hybrid excitation brake is working in the embodiment of the present invention.

In the figure: 101—integral beam; 102—transmission connecting rod; 103—support beam; 104—bogie axle; 105—cantilever rod; 106—transverse connecting rod; 107—coil assembly; 108—terminal pole; spring;

1—beam; 2—excitation coil; 3—auxiliary magnetic pole; 4—permanent magnet half; 5—permanent magnet; 6—iron core; 7—rail; 21—first excitation coil; 22—second excitation coil; 23 —the third excitation coil; 24—the fourth excitation coil; 211—coil inner wall; 212—coil outer wall; 213—coil arc angle; 31—left auxiliary magnetic pole; 32—right auxiliary magnetic pole; 41—left permanent magnet half; 42—right permanent magnet half body; 51—the first permanent magnet; 52—the second permanent magnet; 53—the third permanent magnet; 61—the first iron core, 62—the second iron core, 63—the third iron core, 64—the fourth iron core; 611—the arc angle of the iron core; 612—the plane of the U-shaped groove of the iron core; 613—the U-shaped groove of the iron core; 614—the transition platform of the iron core.

Implementation

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the prior art, the bogie is equipped with a pair of linear eddy current brakes, as shown in Figure 1 and Figure 1a, a transmission link 102 is provided on the outside of the integral beam 101, and a coil assembly 107 is installed on the lower part of the integral beam 101, and the coil assembly 107 has two There is a relay magnetic pole 108 at the end, and the integral beam 101 is connected to the bogie axle 104 through the cantilever rod 105 and the support beam 103. After the coil is energized, the coil assembly 107 forms a magnetic circuit with the rail, and eddy current is generated on the rail, and the Apply braking force to the wheels. The transverse link 106 is used to maintain the distance and stability of the two linear eddy current brakes, and the air spring 109 adjusts the gap between the brake and the rail. However, its functional weight reaches 1600kg; secondly, the excitation power reaches 90kW/set. Even if aluminum coils are used instead, the braking force can meet the requirements of conventional braking (60% of emergency braking), and its functional weight reaches 1230kg. Also need 56kW/set.

As shown in Figure 2, the present invention proposes a novel hybrid excitation line eddy current brake, comprising a crossbeam 1 and auxiliary magnetic poles 3 at left and right ends; the lower part of the crossbeam is connected and fixed with the auxiliary magnetic pole 3 and iron core 6; The excitation coil 2 is set; the upper part of the excitation coil 2 is in contact with the bottom of the beam 1; the lower part of the coil is in contact with the iron core transition platform 614 at the upper and lower parts of the iron core 6; a permanent magnet 5 is arranged between the left and right sides of the lower part of the iron core 6; the permanent magnet 5 is connected and fixed with the iron core U-shaped groove 613 at the lower part of the adjacent iron core; a permanent magnet half body 4 is arranged between the auxiliary magnetic pole 3 at both ends and the lower part of the adjacent iron core 6; 3 and the iron core U-shaped groove 613 of the iron core 6 are connected and fixed. After the coil 2 is energized, the magnetic field generated by the coil 2 generates a magnetic circuit through the beam 1, the iron core 6 and the rail 7. When the vehicle is moving, an eddy current is generated in the rail 7, thereby generating braking force on the vehicle. Specifically, the beam 1 is a steel beam, and the iron core 6 and the auxiliary magnetic pole 3 are connected to the beam 1 through fixing screws;

As shown in Figure 3, it is a preferred embodiment of the present invention, the first exciting coil 21, the second exciting coil 22, the third exciting coil 23 and the fourth exciting coil 24 are evenly distributed, and the coil inner wall 211 is in contact with the iron core 6 top ; There is a coil arc angle 213 at the corner of the coil outer wall 212 .

As shown in FIG. 4 , which is a preferred embodiment of the present invention, the left auxiliary magnetic pole 31 and the right auxiliary magnetic pole 32 are located at both ends of the brake. The purpose is to form a magnetic circuit at the ends to improve magnetic efficiency.

As shown in Figure 5, it is a preferred embodiment of the present invention, the left permanent magnet half body 41 and the right permanent magnet half body 42 are positioned at two ends; The first permanent magnet 51, the second permanent magnet 52 and the third permanent magnet 53 are all in the middle of the cloth.

As shown in FIG. 6 , which is a preferred embodiment of the present invention, the first iron core 61 , the second iron core 62 , the third iron core 63 and the fourth iron core 64 are evenly distributed at the bottom of the beam. Iron core 6 top is installed excitation coil 2, and corner is provided with iron core arc angle 611, and iron core 6 bottom left and right ends have iron core U-shaped groove 613, and iron core U-shaped groove plane 612 is connected and fixed with permanent magnet 5; The upper and lower parts of the core 6 have an iron core transition platform 614 for supporting the coil 2 .

As shown in FIG. 7 , which is a preferred embodiment of the present invention, the magnetic directions of the permanent magnets and the permanent magnet halves are arranged opposite to each other in the same polarity, forming a magnetic circuit with the iron core, beams and auxiliary magnetic poles. Such a magnetic circuit is extremely important. When the brake is not working, it will not generate suction force on the rail and unnecessary braking force on the rail vehicle.

As shown in Figure 8, it is a preferred embodiment of the present invention. After the coil is energized, the polarity of the generated magnetic field is at the top of the pole direction of the lower part of the iron core 6 and the two adjacent permanent magnets (the ends are permanent magnet halves). The original magnetic circuit formed by the permanent magnet 5 and the permanent magnet half body 4 and the beam 1 is forcibly changed by the magnetic pole direction generated by the excitation coil 2, so that it forms a new magnetic circuit with the rail 7. In this way, two magnetic circuits are formed on the rail 7: one is a magnetic circuit formed by permanent magnet excitation as shown in dotted line in Figure 8; the other is a coil excitation circuit as shown in solid line in Figure 8. In this way, the magnetic efficiency is effectively improved, and the purpose of reducing the weight, consumption and cost of the eddy current brake is achieved.

The new hybrid excitation line eddy current brake overcomes the shortcomings of the existing single energized excitation line eddy current brake. Under the condition that the braking performance requirements are basically met, its functional weight is less than 35% of the energized excitation brake; 16% of the total. Its comprehensive cost is 2/3 of the electrified excitation brake. Compared with the existing eddy current brakes, the requirements for the lightweight development of the wheels are realized, and at the same time, the influence of high excitation power on the reliability and durability of the coils is reduced.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications to the technical solutions, or equivalent replacement of some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A new hybrid excitation line eddy current brake, including a beam (1) and an excitation coil (2), characterized in that a group of iron cores (6) are fixedly connected to the bottom of the beam (1), and the iron core (6) is set There is a support mechanism, the excitation coil (2) is sleeved on the upper part of the iron core (6), the inner wall of the coil (211) is in contact with the upper part of the iron core (6), and the top of the excitation coil (2) is in contact with the bottom of the beam (1) through the support mechanism , a permanent magnet (5) is arranged between the iron cores (6), and the permanent magnet (5) is in contact with the lower part of the iron core (6). 2. A new hybrid excitation line eddy current brake according to claim 1, characterized in that the two ends of the bottom of the beam (1) are fixedly connected with auxiliary magnetic poles (3), and the auxiliary magnetic poles (3) are connected to the adjacent iron core A permanent magnet half (4) is arranged between (6), and one end of the permanent magnet half (4) is in contact with the auxiliary magnetic pole (3), and the other end is in contact with the lower part of the iron core (6). 3. A new type of hybrid excitation line eddy current brake according to claim 2, characterized in that the magnetic directions of the permanent magnet (5) and the permanent magnet half (4) are arranged in the same pole direction opposite to the top, and The iron core (6), the beam (1) and the auxiliary magnetic pole (3) form a magnetic circuit. 4. A new hybrid excitation line eddy current brake according to claim 2, characterized in that the excitation direction of the excitation coil (2) is the same as the magnetic pole direction of the permanent magnet (5) and the permanent magnet half body (4) Arranged pole-to-top. 5. A new type of hybrid excitation line eddy current brake according to claim 1, characterized in that the set of iron cores (6) are evenly arranged so that the excitation coil (2), iron The permanent magnets (5) are evenly arranged between the cores (6). 6. A new hybrid excitation line eddy current brake according to claim 1, characterized in that, the corner of the iron core (6) is provided with an iron core arc angle (611), and the coil of the excitation coil (2) The corners of the outer wall (212) are matched with coil arc corners (213). 7. A new type of hybrid excitation line eddy current brake according to claim 1, characterized in that the upper and lower parts of the iron core (6) have a stepped surface structure, forming an iron core transition platform (614). 8. A new type of hybrid excitation line eddy current brake according to claim 1, characterized in that U-shaped slots (613) are provided at both ends of the lower part of the iron core (6). 9. A novel hybrid excitation line eddy current brake according to claim 1, characterized in that the excitation directions of adjacent excitation coils (2) are alternately opposite. 10. A rail vehicle, comprising a vehicle body, characterized in that the linear eddy current brake of the vehicle body is a novel hybrid excitation linear eddy current brake according to any one of claims 1 to 9.