Motor air gap adjustment structure of a maglev train

Abstract

The present invention belongs to the field of maglev trains, and specifically relates to a motor air gap adjustment structure for a maglev train, which includes a suspension frame, a linear motor, and an electromagnet. The linear motor and the electromagnet are respectively arranged on the upper and lower sides of the suspension frame. The suspension frame includes two groups of parallel cross beams. Two groups of linear motors are arranged in parallel. The two groups of linear motors are slidably arranged on both sides of the cross beams along the vertical direction of the maglev track plane. The distance from the lower end surface of the linear motor to the upper end surface of the electromagnet is always greater than the thickness of the maglev track. The present invention can, on the premise that the distance between the lower end surface of the linear motor and the upper end surface of the electromagnet meets the design requirements and leaves enough safety margin, improve the suspension effect of the electromagnet and the driving power of the linear motor at the same time, and improve the decoupling performance of the carriage support frame at the same time.

Description

Technical Field

[0001] The present invention belongs to the field of maglev trains, and particularly relates to a motor air gap adjustment structure for a maglev train. Background Art

[0002] A maglev train is a modern high-tech rail transit vehicle. It realizes non-contact suspension and guidance between the train and the track through magnetic force, and then uses a linear motor to drive the train. Because there is no friction with the track, the resistance of the vehicle body during driving is greatly reduced. Driven by a high-power linear motor, a maglev train can reach a very high driving speed (about 600 - 2000 km / h).

[0003] A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism, and has the characteristics of high speed, large acceleration, high precision, fast response, etc. In the field of maglev trains, a linear motor is generally arranged on a suspension frame and used in cooperation with an aluminum induction plate on a suspension track. The interval between the linear motor and the aluminum induction plate is called an air gap. Generally, the smaller the air gap, the greater the power of the linear motor;

[0004] Currently, in the field of maglev trains, the linear motor and the electromagnet are relatively fixed on the suspension frame and act on both sides of the suspension track respectively. The linear motor is used to generate the driving force of the train, and the electromagnet is used to generate the suspension force of the train; there are air gaps between the linear motor and the electromagnet and the suspension track; currently, the suspension frame, the electromagnet, and the linear motor are generally relatively rigidly fixed, that is, the relative distance between the electromagnet and the linear motor is constant, and this relative distance must be greater than the thickness of the suspension track to ensure that during the train operation, neither the electromagnet nor the linear motor will collide with the suspension track. Because of this, a certain safety margin needs to be left for this relative distance; during the suspension process, the air gap between the electromagnet and the suspension track becomes smaller, and at the same time, the air gap between the linear motor and the suspension track becomes larger, making it difficult to improve the suspension and driving effects simultaneously. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a motor air gap adjustment structure for a maglev train that can effectively balance the suspension and driving effects.

[0006] The content of the present invention includes a suspension frame, a linear motor, and an electromagnet. The linear motor and the electromagnet are respectively arranged on the upper and lower sides of the suspension frame. The suspension frame includes two groups of parallel cross beams. Two groups of linear motors are arranged in parallel. The two groups of linear motors are slidably arranged on both sides of the cross beams along the vertical direction of the suspension track plane. The distance from the lower end surface of the linear motor to the upper end surface of the electromagnet is always greater than the thickness of the suspension track.

[0007] Furthermore, rollers are provided on the linear motor, and the linear motor contacts the suspension track through the rollers.

[0008] Furthermore, the rollers are provided on both sides of the linear motor close to the suspension track.

[0009] The present invention further includes an elastic body provided on the suspension frame for pushing the linear motor to always be at the lower limit stroke in the sliding stroke.

[0010] Furthermore, an upper limit plate and a lower limit plate are arranged in parallel on the suspension frame. A connecting plate inserted between the upper limit plate and the lower limit plate is provided on the linear motor. A sliding shaft arranged between the upper limit plate and the lower limit plate is also included. A sliding hole matching the sliding shaft is provided on the connecting plate.

[0011] Furthermore, the sliding shaft is slidably arranged on the lower limit plate along the vertical direction of the suspension track plane. The lower end of the sliding shaft extends out of the lower end face of the lower limit plate. An installation block is also provided on the lower end face of the sliding shaft. The elastic body is a spring sleeved between the lower end face of the lower limit plate and the installation block.

[0012] Furthermore, an air gap adjusting gasket is provided between the lower limit plate and the connecting plate.

[0013] The present invention further includes a distance detection device provided on the suspension frame for detecting the air gap between the lower end face of the linear motor and the upper end face of the suspension track and the air gap between the upper end face of the electromagnet and the lower end face of the suspension track.

[0014] Furthermore, the suspension frame includes a carriage support frame arranged in a rectangle, support arms vertically downwardly arranged on both sides of the carriage support frame, and an electromagnet mounting frame arranged on the support arms and facing the inside of the rectangle.

[0015] Furthermore, moving wheels matching the suspension track are provided on the carriage support frame.

[0016] The beneficial effects of the present invention are as follows: The linear motor of the present invention is slidably arranged on both sides of the cross beam along the vertical direction of the suspension track plane, so that the linear motor has a vertical sliding stroke. When suspended, the increased distance of the air gap of the linear motor is less than the shortened distance of the air gap of the electromagnet. Therefore, on the premise that the distance between the lower end face of the linear motor and the upper end face of the electromagnet meets the design requirements and there is enough safety margin, the suspension effect of the electromagnet and the driving power of the linear motor can be improved at the same time. In addition, in the present invention, the linear motor is connected to the cross beam as a longitudinal beam to form the carriage support frame in the suspension frame. The linear motor slidably arranged on both sides of the cross beam along the vertical direction of the suspension track plane can provide a degree of freedom in one direction, improving the decoupling performance of the carriage support frame. Description of the Drawings

[0017] Figure 1It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of part of the first corner of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of part of the second corner of the present invention.

[0020] Figure 4 It is Figure 3 The partial enlarged view of position A in

[0021] Figure 5 It is Figure 3 The partial enlarged view of position B in

[0022] Figure 6 It is the front sectional view of the present invention.

[0023] Figure 7 It is the side sectional view of the present invention.

[0024] Figure 8 It is Figure 7 The partial enlarged view of position C in

[0025] In the figure, 1 - suspension frame; 11 - upper limit plate; 12 - lower limit plate; 13 - sliding shaft; 131 - mounting block; 14 - support arm; 15 - electromagnet mounting frame; 16 - moving wheel; 17 - cross beam; 18 - decoupling support; 2 - linear motor; 21 - connecting plate; 211 - sliding hole; 3 - electromagnet; 4 - suspension track; 41 - F-shaped track; 42 - aluminum induction plate; 43 - sleeper; 5 - roller; 6 - elastomer; 7 - distance detection device. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0031] As shown in the Figures 1-8 accompanying drawings, the present invention includes a suspension frame 1, a linear motor 2 and an electromagnet 3. The linear motor 2 and the electromagnet 3 are respectively arranged on the upper and lower sides of the suspension frame 1;

[0032] Among them, the suspension frame 1 includes a carriage support frame arranged in a rectangle, support arms 14 vertically downwardly arranged on both sides of the carriage support frame, and an electromagnet mounting frame 15 arranged on the support arms 14 and facing the inside of the rectangle. The linear motor 2 is arranged on both sides of the carriage support frame parallel to the suspension track 4, and two groups of electromagnets 3 are arranged along the length direction on two groups of electromagnet mounting frames 15 respectively; Generally, the carriage support frame is composed of two cross beams 17, two longitudinal beams and four decoupling supports 18. The decoupling supports 18 are used to connect the cross beams 17 and the longitudinal beams. In the present invention, the linear motor 2 is directly used as the longitudinal beam;

[0033] Among them, as Figure 6As shown in the figure, the suspension track 4 includes a sleeper 43 and F-shaped tracks 41 provided at both ends of the sleeper 43. The main body of the F-shaped track 41 is made of carbon steel and can cooperate with the electromagnet 3 to form a suspension force on the suspension frame 1 and the carriage on the suspension frame 1. An aluminum induction plate 42 is provided on the surface of the F-shaped track 41 for cooperating with the linear motor 2 on the suspension frame 1 to provide the driving force for the suspension frame 1 and the carriage on the suspension frame 1 to travel. When in the parking state, the suspension frame 1 stays on the inner groove of the F-shaped track 41 through the moving wheels 16. When in the driving state, the electromagnet 3 acts on the F-shaped track 41 and drives the suspension frame 1 and the linear motor 2 to levitate, so that the whole is separated from the suspension track 4. An air gap a is formed between the lower surface of the linear motor 2 and the upper surface of the aluminum induction plate 42, and an air gap b is formed between the upper surface of the electromagnet 3 and the lower surface of the F-shaped track 41; on the premise that the air gap a is ensured to exist (that is, to ensure that the linear motor 2 cannot contact the aluminum induction plate 42 in the levitation state), the smaller the air gap a is, the greater the driving power of the linear motor 2 is, and the distance between the lower end surface of the linear motor 2 and the upper end surface of the electromagnet 3 needs to consider leaving a safety margin.

[0034] In the present invention, two groups of linear motors 2 are slidably arranged on both sides of the cross beam 17 along the vertical direction of the plane of the suspension track 4, and the distance from the lower end surface of the linear motor 2 to the upper end surface of the electromagnet 3 is always greater than the thickness of the suspension track 4.

[0035] In the present invention, the linear motors 2 are slidably arranged on both sides of the cross beam 17 along the vertical direction of the plane of the suspension track 4. During the suspension process, the electromagnet 3 levitates and rises. During the rising process, it approaches the F-shaped track 41 to shorten the air gap b. At this time, after canceling the sliding stroke, the linear motor 2 further increases the air gap a from the upper surface of the aluminum induction plate 42. Since the linear motor 2 has a vertical sliding stroke, the increased distance of the air gap a is less than the shortened distance of the air gap b. Therefore, on the premise that the distance between the lower end surface of the linear motor 2 and the upper end surface of the electromagnet 3 meets the design requirements and leaves enough safety margin, the suspension effect of the electromagnet 3 and the driving power of the linear motor 2 can be improved at the same time. Just by a simple structural improvement, the problem that the driving power of the motor has to be sacrificed at present because the distance between the lower end surface of the linear motor 2 and the upper end surface of the electromagnet 3 needs to be standardized is solved. In addition, in the present invention, the linear motor 2 is connected to the cross beam 17 as a longitudinal beam and forms a carriage support frame in the suspension frame 1. The linear motors 2 are slidably arranged on both sides of the cross beam 17 along the vertical direction of the plane of the suspension track 4, which can provide a degree of freedom in one direction and further improve the decoupling performance of the carriage support frame.

[0036] The safety margin referred to in the present invention includes the difference between the distance from the lower end face of the linear motor 2 to the upper end face of the electromagnet 3 and the thickness of the suspension track 4 when the linear motor 2 reaches the lower limit stroke during operation; it also includes the difference between the distance from the lower end face of the linear motor 2 to the upper end face of the electromagnet 3 and the thickness of the suspension track 4 when the linear motor 2 reaches the upper limit stroke during shutdown and installation. The safety margin during operation ensures the safety of the train, and the safety margin during shutdown and installation ensures the design requirements and reduces the installation difficulty.

[0037] As Figure 8 shown, rollers 5 are provided on the linear motor 2. The linear motor 2 contacts the suspension track 4 through the rollers 5. By providing the rollers 5, direct contact between the linear motor 2 and the aluminum induction plate 42 on the suspension track 4 during parking and the parking process can be avoided, which may cause wear of the linear motor 2 and the aluminum induction plate 42. The provision of the rollers 5 can also avoid contact problems caused by the unevenness of the aluminum induction plate 42. At this time, the sliding transition can be achieved through the rollers 5. Specifically, the rollers 5 are provided on both sides of the linear motor 2 close to the suspension track 4. The rollers 5 are installed without occupying too much space, and the roller surface of the rollers 5 protrudes from the lower end face of the linear motor 2.

[0038] The present invention further includes an elastic body 6 provided on the suspension frame 1 for pushing the linear motor 2 to always be at the lower limit stroke of the sliding stroke. By providing the elastic body 6, a buffer force can be formed for the linear motor 2 to avoid excessive oscillation during the decoupling process of the car body support frame or when the suspension track 4 is uneven and vibrates, and it can ensure that the air gap a does not expand too much due to vibration.

[0039] An upper limit plate 11 and a lower limit plate 12 are arranged in parallel on the suspension frame 1. A connecting plate 21 inserted between the upper limit plate 11 and the lower limit plate 12 is provided on the linear motor 2. A sliding shaft 13 is also provided between the upper limit plate 11 and the lower limit plate 12. A sliding hole 211 matching the sliding shaft 13 is provided on the connecting plate 21. In this embodiment, a degree of freedom for the linear motor 2 to rotate relative to the cross beam 17 is also provided, which further improves the decoupling performance of the car body support frame. At the same time, the vertical sliding of the linear motor 2 can be restricted, and the stability of the connection between the linear motor 2 and the cross beam 17 can be improved. Preferably, the upper limit plate 11 and the lower limit plate 12 are arranged on the decoupling support 18.

[0040] The sliding shaft 13 is slidably arranged on the lower limiting plate 12 in the vertical direction along the plane of the suspension track 4. The lower end of the sliding shaft 13 extends out of the lower end surface of the lower limiting plate 12. An installation block 131 is also arranged on the lower end surface of the sliding shaft 13. The elastic body 6 is a spring sleeved between the lower end surface of the lower limiting plate 12 and the installation block 131. In this embodiment, the elastic member is not arranged between the upper limiting plate 11 and the lower limiting plate 12, so that the distance between the upper limiting plate 11 and the lower limiting plate 12 can be completely formed by the movement of the linear motor 2, ensuring a compact structure. Setting the spring in this way at the lower end of the lower limiting plate 12 will not increase the overall volume and size.

[0041] An air gap adjusting gasket is arranged between the lower limiting plate 12 and the connecting plate 21, which can facilitate the adjustment of a suitable air gap a.

[0042] The present invention further includes a distance detection device 7 arranged on the suspension frame 1 for detecting the air gap between the lower end surface of the linear motor 2 and the upper end surface of the suspension track 4 and the air gap between the upper end surface of the electromagnet 3 and the lower end surface of the suspension track 4. The distance detection device 7 preferably adopts a distance sensor.

[0043] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. An air gap adjustment structure for the motor of a maglev train, comprising a suspension frame (1), a linear motor (2) and an electromagnet (3), wherein the linear motor (2) and the electromagnet (3) are respectively arranged on the upper and lower sides of the suspension frame (1), and is characterized in that, The suspension frame (1) includes a carriage support frame arranged in a rectangle, and the carriage support frame consists of two groups of parallel cross beams (17), two groups of parallel longitudinal beams, and four decoupling supports (18). Two groups of linear motors (2) are arranged in parallel. The two groups of linear motors (2) are slidably arranged on both sides of the cross beam (17) in the vertical direction of the plane of the suspension track (4). The linear motors (2) are used as longitudinal beams, and the distance from the lower end face of the linear motor (2) to the upper end face of the electromagnet (3) is always greater than the thickness of the suspension track (4). It further includes an elastic body (6) arranged on the suspension frame (1) for pushing the linear motor (2) to always be at the lower limit stroke in the sliding stroke. An upper limit plate (11) and a lower limit plate (12) are arranged in parallel on the decoupling support (18). A connecting plate (21) inserted between the upper limit plate (11) and the lower limit plate (12) is arranged on the linear motor (2). A sliding shaft (13) arranged between the upper limit plate (11) and the lower limit plate (12) is also included. A sliding hole (211) cooperating with the sliding shaft (13) is arranged on the connecting plate (21).

2. The motor air gap adjustment structure of the maglev train according to claim 1, characterized in that, Rollers (5) are arranged on the linear motor (2), and the linear motor (2) contacts the suspension track (4) through the rollers (5).

3. The motor air gap adjustment structure of the maglev train according to claim 2, characterized in that The rollers (5) are arranged on both sides of the linear motor (2) close to the suspension track (4).

4. The motor air gap adjustment structure of the maglev train according to claim 1, characterized in that, The sliding shaft (13) is slidably arranged in the vertical direction of the plane of the suspension track (4) on the lower limit plate (12). The lower end of the sliding shaft (13) extends out of the lower end face of the lower limit plate (12). An installation block (131) is also arranged on the lower end face of the sliding shaft (13). The elastic body (6) is a spring sleeved between the lower end face of the lower limit plate (12) and the installation block (131).

5. The motor air gap adjustment structure of the maglev train according to claim 4, characterized in that, An air gap adjusting gasket is arranged between the lower limit plate (12) and the connecting plate (21).

6. The motor air-gap adjusting structure of the maglev train according to any one of claims 1-5, characterized in that, It further includes a distance detection device (7) arranged on the suspension frame (1) for detecting the air gap between the lower end face of the linear motor (2) and the upper end face of the suspension track (4) and the air gap between the upper end face of the electromagnet (3) and the lower end face of the suspension track (4).

7. The motor air-gap adjusting structure of the maglev train according to any one of claims 1-5, characterized in that The suspension frame (1) includes a carriage support frame arranged in a rectangle, support arms (14) vertically downwardly arranged on both sides of the carriage support frame, and an electromagnet mounting frame (15) arranged on the support arms (14) and facing the inside of the rectangle.

8. The motor air gap adjustment structure of the maglev train according to claim 7, characterized in that, Moving wheels (16) cooperating with the suspension track (4) are arranged on the carriage support frame.

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