CN1323863C - Suspended magnetic iron structure of magnetic suspension vehicle and its production mehtod - Google Patents

Abstract

A suspension magnet structure for a maglev train, comprising an iron core and a coil, characterized in that the coil is a coil wound by an aluminum foil with a thickness of 0.15-0.30 mm and an insulating film with a thickness of 0.01-0.03 mm; There is a copper cooling jacket, and the inside of the cooling jacket is provided with a zigzagging passage, and the outside is provided with pipe joints communicating with the two ends of the passage respectively. The invention solves the problem of effectively cooling the coil of the suspension magnet under the condition of increasing the excitation current, and improves the number of coil turns and the high current resistance performance, and can meet the carrying requirements of urban rail transit during the peak passenger flow , and the technical problems of its manufacture.

Description

Levitation magnet structure and production method of maglev vehicle

Technical field:

The invention belongs to the levitation magnet structure and its manufacturing technology of a vehicle with the conventional electromagnetic levitation technology.

Background technique:

Maglev vehicles can be divided into two types: electromagnetic suspension (EMS-electromagnetics suspension) and electric suspension (EDS-electrodynamic suspension) from the suspension mechanism. Electromagnetic Suspension (EMS) is to energize and excite the vehicle-mounted suspension electromagnet (or permanent magnet plus excitation control coil) to generate an electromagnetic field, and the electromagnet and the ferromagnetic component on the track (steel track or long stator linear motor stator core) attract each other , Suction the train upwards and suspend it on the track. The suspension gap between the electromagnet and the ferromagnetic track is generally about 8-10mm. Electric Suspension (EDS) means that the train can only be suspended when it reaches a certain speed. When the train is moving, the moving magnetic field of the magnet installed on the train generates an induced current in the suspension coil installed on the line, and the two interact to generate an upward magnetic force to suspend the train at a certain height on the road (generally 100-150mm) .

Electromagnetic Suspension (EMS) trains are represented by TR08 of Germany and HSST-100L of Japan, see patents for details: CN1456458A, CN1273189A, US6753666B2, US4641586, US5152227.

Referring to Figure 1, the traction of HSST-100L depends on the linear induction motor stator coil 9 installed on the bogie bracket arm 7 on both sides of the bottom of the carriage and the straight line on the F-shaped magnetic guide rail 8 installed on both sides of the line sleeper 81 The motor reaction plate 5 is realized, and both suspension and guidance are realized by the same group of suspension electromagnets 4 . When the suspension electromagnet 4 of the train and the center line of the raised track below the F-shaped magnetic steel rail 8 are misaligned each other, the lateral component force formed makes the electromagnet automatically reset and guides. But this lateral force is relatively small, and is only suitable for guiding maglev trains with low speed. The traction motors of maglev trains are all linear motors, which can generally be divided into two types, namely long stator linear synchronous motors and short stator linear induction motors. The HSST low-speed maglev train is driven by a short-stator linear induction motor.

According to the description of short stator maglev vehicles in US5152227, JP3-30366, JP63-209406 and other patents, most of the levitation electromagnets 4 of the existing maglev vehicles are single-coil structures, and the number of coil turns is limited by the overall size of the vehicle. The passenger carrying capacity of the vehicle is insufficient, and the requirements of the peak hours of urban traffic passenger flow cannot be well met. If the excitation current is increased to improve the levitation ability, it will cause the overheating of the levitation coil. Although many holes have been drilled on the levitation magnet core as cooling by the air flow of the train (see JP62-210807 patent), no significant effect has been seen. the result of.

In addition, in terms of the design and manufacture of the levitating magnet core, there is no published technical information indicating that levitating magnets with a split assembly structure are mostly manufactured by welding and machining methods, which cannot meet the needs of large manufacturers in terms of cost and process complexity. Requirements for mass production and economic benefits. This is also a factor in the high cost of urban rail maglev trains.

Invention content:

The object of the present invention is to propose a levitation magnet structure of a maglev train and a manufacturing method thereof, to solve the problem of effectively cooling the coil of the levitation magnet under the condition of increasing the excitation current, and having both the number of turns of the coil and the high current resistance performance. The improvement can meet the carrying requirements of urban rail transit passenger flow peak hours, as well as the technical problems of its manufacture.

The technical scheme that the present invention solves the problems of the technologies described above is as follows:

A suspension magnet structure for a maglev train, comprising an iron core and a coil, characterized in that the coil is a coil wound by an aluminum foil with a thickness of 0.15-0.30 mm and an insulating film with a thickness of 0.01-0.03 mm; There is a copper cooling jacket, and the inside of the cooling jacket is provided with a zigzagging channel, and the outside is provided with pipe joints communicating with the two ends of the channel.

Further, each suspension magnet has two coils arranged side by side.

Furthermore, a cooling jacket is also provided between the two parallel coils.

Still further, the iron core is a split structure in which the magnetic poles located on both sides and the magnetic poles connecting one end of the two magnetic poles are connected by screws.

A kind of manufacturing method for producing above-mentioned suspension magnet, its steps are as follows:

1) Machining the magnetic poles and magnetic parts of the iron core to shape them respectively; and grinding the joint plane between them;

2) Put the cooling jacket into the processed magnet, and then fix one end of the two magnetic poles on both sides of the magnet with screws;

3) Clamp the above-mentioned assembled iron core on the rotating shaft of the winding machine, set up the rolled aluminum foil and insulating film material with a special auxiliary bracket, and make the aluminum foil and insulating film respectively contact with the coil on the iron core. Alignment; the aluminum foil or insulating film material has been treated with surface glue in advance;

4) Install lead wires at the end of the aluminum foil, and introduce the aluminum foil and insulating film into the iron core at the same time for coil winding. During the winding process, the aluminum foil and the insulating film are bonded to each other without detachment;

5) Dip the whole suspension magnet with the coil wound in step 4 into insulating varnish, and then dry it;

6) Then apply heat-dissipating paint on the surface of the dried suspension magnet.

The present invention has the following technical characteristics and beneficial effects:

1) The split magnetic pole assembly design is adopted to simplify the machining and manufacturing process of the magnetic pole, which is economical and practical;

2) Use bolts to fix and assemble the split magnetic pole, which is more conducive to its fixed connection with the vehicle bogie support arm;

3) Aluminum foil is selected as the conductor of the suspension magnetic pole coil, which can make the suspension magnetic pole coil withstand a large excitation current;

4) The process of winding the suspension magnetic pole coil after compounding the insulating film and aluminum foil is adopted, which can ensure the insulation performance and quality of the product, and is beneficial to increase the excitation current;

5) The dual-coil structure is adopted, which can increase the number of turns of the levitation magnetic pole coil in a limited space, which is beneficial to improve the levitation ability;

6) Double coils wound in the same direction are selected to increase the magnetic density of the levitating magnet, and the levitation force of electromagnetic attraction is significantly improved;

7) The cooling jacket between the coils is used to realize the effective cooling of the overheating of the coils under the action of high excitation current;

8) The geometric size of the coil cooling jacket is the same as the shape of the coil, and can be integrated with it, which is beneficial to the protection of the coil;

9) After the installation, the overall magnetic pole, cooling jacket and coil are dipped in paint to facilitate the formation of the overall structure of the suspended magnetic pole coil, which has the effect of improving the insulation performance;

10) Coating the heat dissipation paint on the surface of the coil and the magnetic pole is beneficial to the heat dissipation of the suspension magnet module and protects the magnet.

Description of drawings:

Figure 1 is a schematic diagram of the traction linear motor and levitation magnet structure of HSST series maglev trains.

Fig. 2 is a perspective view of the suspension magnet of the present invention.

Fig. 3 is a three-dimensional exploded view of the suspension magnet of the present invention.

Fig. 4 is a schematic diagram of the magnetic circuit of the suspension magnet of the present invention.

Fig. 5 is a schematic diagram of the coil winding method of the levitation magnet of the present invention.

Detailed ways:

Referring to FIG. 2 and FIG. 3 , the levitating magnet of the present invention is composed of an iron core 1 , a coil 2 and a cooling jacket 3 . The iron core 1 is a split combined structure, which is composed of two magnetic poles 12 located on both sides and a magnetic pole 11 located in the middle of the two magnetic poles 12 and connected to one end of the two magnetic poles 12 respectively, and is fixed on the Together, they form an iron core with a circular cross-section. The coil 2 is wound from a 0.15-0.30mm thick aluminum foil 22 and a 0.01-0.03mm thick insulating film 21 (such as a polyurethane film). The present invention replaces the general enameled wire with aluminum foil, so that the coil can withstand a larger excitation current . The coil 2 is set on the magnet 11, and the number of the coil 2 can be one, but in order to increase the number of turns of the coil 2 and the effect of cooling in a limited space, it is preferable to divide it into two parallel coils, This is a so-called double coil, between which two coils 2 three cooling jackets 3 are arranged. The cooling jacket 3 is made of copper material with good thermal conductivity. The hollow 31 in the middle is set on the magnet 11, and there is a winding channel inside. The two ends of the channel are respectively arranged on the outer periphery of the cooling jacket 3. Connected to the pipe joint (not shown in the figure). During use, the cooling jacket 3 is filled with a fluid heat-conducting working medium (such as Freon), and is connected with a condenser on the maglev train with a conduit to form a closed cooling system.

The suspension magnet structure of the present invention is significantly different from the suspension magnet structure of the existing maglev train, and its manufacturing method is also different from the prior art. Now take the suspension magnet with double coil 2 as an example, describe in detail the details of its manufacturing method Proceed as follows:

1) The magnetic pole 12 and the magnetic pole 11 are machined and formed respectively, and the joint plane between them is ground to ensure effective close contact between them, so as to obtain the same magnetic circuit as the overall magnetic core (see Fig. 4).

2) Put 3 sets of cooling jackets into the magnetic pole 11, and then fix one end of the two magnetic poles 12 on both sides of the magnetic pole 11 with screws;

3) Please refer to Fig. 5, clamp the iron core 1 assembled above on the rotating shaft of the winding machine, set up two aluminum foils 22 and two insulating films 21 arranged side by side in rolls on it with special auxiliary brackets, and Align the aluminum foil 22 and the insulating film 21 with the two spaces separated by the cooling jacket 3 in the middle of the magnetic core 11, and the two aluminum foil 22 coils or the insulating film 21 coils have been treated with surface glue in advance ;

4) After the lead-out terminals are installed at the ends of the two aluminum foils 22, the aluminum foil 22 and the insulating film 21 are simultaneously introduced into the iron core 1 for double-coil winding in the same direction (see Figure 5). During the winding process, the aluminum foil 22 and the insulating film 21 must not have a detachment phenomenon, and after the winding is completed, install a lead terminal at the end of the aluminum foil 22;

5) Dip the whole suspension magnet with coil 2 wound in step 4 into insulating varnish, and then dry it;

6) Coat the surface of the dried suspension magnet with heat-dissipating paint commonly used in the transformer manufacturing industry.

The cooling jacket 3 of the present invention should pass a leakage test before being assembled with the iron core 1, and the present invention should pass an electrical performance test after being manufactured before it can be put into use.

Claims (5)

1. A levitation magnet structure for a maglev train, comprising an iron core and a coil, characterized in that the coil is a coil wound by an aluminum foil with a thickness of 0.15-0.30 mm and an insulating film with a thickness of 0.01-0.03 mm; on both sides of the coil Copper cooling jackets are respectively provided, and the inside of the cooling jacket is provided with a winding channel, and the outside is provided with pipe joints respectively communicating with the two ends of the channel. 2. The suspension magnet structure according to claim 1, wherein each suspension magnet has two coils arranged side by side. 3. The suspension magnet structure according to claim 2, characterized in that a cooling jacket is also arranged between the two parallel coils. 4. The levitation magnet structure according to claim 1, 2 or 3, characterized in that: the iron core is a split type that consists of magnetic poles located on both sides and a magnetic pole connecting one end of the two magnetic poles, which are connected into one by screws structure. 5. A manufacturing method for producing the suspension magnet structure described in claim 1, 2, 3 or 4, the steps are as follows: 1) Machining the magnetic poles and magnetic parts of the iron core to shape them respectively; and grinding the joint plane between them; 2) Put the cooling jacket into the processed magnet, and then fix one end of the two magnetic poles on both sides of the magnet with screws; 3) Clamp the above-mentioned assembled iron core on the rotating shaft of the winding machine, set up the rolled aluminum foil and insulating film material with a special auxiliary bracket, and make the aluminum foil and insulating film respectively contact with the coil on the iron core. Alignment; the aluminum foil or insulating film material has been treated with surface glue in advance; 4) Install lead wires at the end of the aluminum foil, and introduce the aluminum foil and insulating film into the iron core at the same time for coil winding. During the winding process, the aluminum foil and the insulating film are bonded to each other without detachment; 5) Dip the whole suspension magnet with the coil wound in step 4 into insulating varnish, and then dry it; 6) Then apply heat-dissipating paint on the surface of the dried suspension magnet.

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