Rotating mechanism, permanent magnet eddy current brake and rail vehicle

Abstract

The present invention provides a rotating mechanism, a permanent magnetic eddy current brake, and a rail vehicle. The rotating mechanism includes: a protective cover disposed at the bottom of the permanent magnetic eddy current brake's connecting beam and surrounding the exterior of the permanent magnetic eddy current brake's magnetic pole assembly to shield the magnetic pole assembly; the protective cover having an opening along the length of the magnetic pole assembly on the side facing the track; and a rotating power source disposed at the end of the magnetic pole assembly. When the permanent magnetic eddy current brake switches from a release state to a braking state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface faces the track. When the permanent magnetic eddy current brake switches from a braking state to a release state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface is shielded within the protective cover. The rotating mechanism can realize the switching between the braking state and the release state of the permanent magnetic eddy current brake, has a compact structure, and is highly reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail vehicle braking, and in particular relates to a rotating mechanism, a permanent magnet eddy current brake and a rail vehicle. Background Art

[0002] As a new non-adhesive braking method, eddy current braking has attracted widespread attention for its superior braking performance and wear-free characteristics. Eddy current braking can be further divided into electromagnetic eddy current braking and permanent magnet eddy current braking. Permanent magnet eddy current braking offers two main advantages over electromagnetic eddy current braking: it requires no external power supply for excitation, significantly saving braking power; and it requires no power supply, eliminating the risk of brake failure in the event of a power outage.

[0003] The linear permanent magnet eddy current brake is installed on the frame of the high-speed train bogie. When the vehicle brakes suddenly, the linear permanent magnet eddy current brake releases the permanent magnet structure to a certain distance from the rail surface, generating an eddy current effect on the track and thus generating a non-adhesive brake with braking force.

[0004] Electromagnetic eddy currents can switch between braking and release states by energizing and de-energizing the brakes. However, due to the self-excitation of permanent magnets, in the non-braking state, if no corresponding measures are taken, braking force will still be generated during the operation of the vehicle, thereby affecting the operation of the vehicle.

[0005] When the permanent magnet eddy current brake of a high-speed train is in the braking state, the bottom surface of the magnetic pole is a certain distance away from the surface of the track, and eddy currents are generated between the brake and the track, thereby generating braking force; when the brake is in the non-working state during the operation of the train, it needs to be placed in a higher position to adapt to the vertical bumps and vibrations generated during the operation of the train, but such a distance is not enough to isolate the magnetic lines of force of the permanent magnet, and the braking force still exists, and it is impossible to effectively realize the switching between the braking state and the relief state. Summary of the Invention

[0006] In response to the deficiencies in the related art, the present invention provides a rotating mechanism, a permanent magnet eddy current brake and a rail vehicle, which can realize the switching of the permanent magnet eddy current brake between the braking state and the relief state, and has a compact structure and high reliability.

[0007] A first aspect of the present invention provides a rotating mechanism for use in a permanent magnet eddy current brake, the permanent magnet eddy current brake comprising a magnetic pole assembly and a connecting beam disposed above the magnetic pole assembly, the magnetic pole assembly having a working surface capable of generating an eddy current effect with a track, the rotating mechanism comprising:

[0008] a protective cover, the protective cover being arranged at the bottom of the connecting beam and surrounding the outside of the magnetic pole assembly to shield the magnetic pole assembly, the protective cover having an opening on a side facing the track along the length direction of the magnetic pole assembly;

[0009] A rotating power source is provided at the end of the magnetic pole assembly, and the rotating power source can drive the magnetic pole assembly to rotate; when the permanent magnetic eddy current brake is switched from a relief state to a braking state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface is opposite to the track; when the permanent magnetic eddy current brake is switched from a braking state to a relief state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface is shielded in the protective cover.

[0010] In some embodiments of the present invention, the rotating mechanism also includes a connecting support, the top of the connecting support is fixedly connected to the bottom of the connecting beam, one side of the connecting support is connected to the rotating power source, the connecting support is provided with a through hole, a rotating shaft is passed through the through hole, one end of the rotating shaft is connected to the output end of the rotating power source, and the other end of the rotating shaft is connected to the end of the magnetic pole assembly.

[0011] In some embodiments of the present invention, a bearing is further provided in the through hole to facilitate the rotation of the rotating shaft.

[0012] In some embodiments of the present invention, the rotating mechanism further includes a connecting plate, one side of which is fixedly disposed on the end of the magnetic pole assembly, and the other side of the connecting plate is adjacent to the connecting support and fixedly connected to the rotating shaft.

[0013] A second aspect of the present invention provides a permanent magnet eddy current brake, comprising the rotating mechanism as described in any one of the above items.

[0014] In some embodiments of the present invention, the permanent magnet eddy current brake further comprises:

[0015] a magnetic pole assembly, both ends of which are connected to the rotary power source of the rotating mechanism;

[0016] a connecting beam, the connecting beam being arranged on the top of the protective cover of the rotating mechanism;

[0017] A lifting mechanism, comprising:

[0018] Air spring support seat, the air spring support seat is arranged on both sides of the top of the connecting beam

[0019] end, the air spring support seat has a mounting cavity;

[0020] The air spring is installed in the installation cavity, and the top of the air spring

[0021] The portion is connected to the inner side of the top of the air spring support seat;

[0022] A brake mounting plate is used to mount the permanent magnet eddy current brake on the bogie, and the brake mounting plate is fixedly arranged on the bottom of the air spring.

[0023] In some embodiments of the present invention, the rotary power source includes a rotary cylinder, the rotary cylinder and the air spring are connected through an air circuit and are both connected to the air duct, and a control component is provided on the air circuit, and the control component can control the opening and closing of the air circuit when receiving a braking or relief instruction.

[0024] In some embodiments of the present invention, the rotary cylinder has a first air port and a second air port, and the control component includes a first control valve, a second control valve and a third control valve arranged on the air path, the first control valve is arranged on the air duct, and a first port and a second port are provided on the same side of the first control valve, the first air port and the air spring are both connected to the first port of the first control valve, and the second air port is connected to the second port of the first control valve; the air spring is connected to the second air port through the second control valve, and a one-way valve is provided on the passage connecting the air spring and the second air port, the air inlet of the one-way valve is connected to the air spring, and the air outlet of the one-way valve is connected to the second air port; the first air port and the air spring are both connected to the outside world through the third control valve, and the port of the third control valve connected to the outside world is provided with a throttle valve;

[0025] When a braking command is received, the first port and the second port of the first control valve are both closed, the second control valve and the third control valve are opened, the air spring is exhausted, and at the same time, the gas in the rotating cylinder is discharged from the first air port, and the exhausted gas enters the rotating cylinder through the second air port, driving the rotating cylinder to rotate;

[0026] When a relief instruction is received, the second control valve and the third control valve are closed, and the first port of the first control valve is forward-conducted so that the gas in the air duct enters the air spring and enters the rotating cylinder through the first air port. At the same time, the second port of the first control valve is reverse-conducted so that the gas in the rotating cylinder is discharged through the second air port, driving the rotating cylinder to rotate.

[0027] In some embodiments of the present invention, in the braking state, when it is detected that the rotating cylinder has not rotated to the right position or the set time has been reached, the second port of the first control valve is forward-conducted and the first port is reverse-conducted. At the same time, the second control valve and the third control valve are closed, so that the gas in the air duct directly enters the rotating cylinder through the second air port.

[0028] A third aspect of the present invention provides a rail vehicle, comprising a bogie, on which the permanent magnet eddy current brake as described in any one of the above items is provided.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are:

[0030] (1) The rotating mechanism provided by at least one embodiment of the present invention can effectively ensure the switching between the braking state and the relief state of the permanent magnetic eddy current brake through the cooperation between the protective cover and the rotating power source, combined with the vertical movement of the permanent magnetic eddy current brake, and has a compact structure and high reliability.

[0031] (2) The rotating mechanism provided by at least one embodiment of the present invention has a protective function, which can prevent the impact of foreign objects on the roadside or adsorption caused by magnetic force when the vehicle is running at high speed, and also provides convenience for subsequent maintenance.

[0032] (3) The permanent magnet eddy current brake provided by at least one embodiment of the present invention is provided with a rotating mechanism, which drives the rotation of the magnetic pole assembly to cooperate with the lifting movement of the magnetic pole assembly, thereby realizing automatic switching between the braking and release states, having high reliability and being adaptable to the needs of rail vehicle operation.

[0033] (4) In the permanent magnet eddy current brake provided by at least one embodiment of the present invention, the rotary power source and the air spring share a pneumatic system, which fully utilizes the structural characteristics of the permanent magnet eddy current brake itself to convert the vertical motion of the air spring into the combined vertical and rotary motions of the magnetic pole assembly, thereby realizing automatic switching between the braking and relief states.

[0034] (5) The rail vehicle provided by at least one embodiment of the present invention can realize automatic switching between a braking state and a relief state, and effectively prevent the generation of braking force in the relief state, thereby improving the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 Schematic diagram of the structure of the rotating mechanism provided in the embodiment of the present invention Figure 1 ;

[0037] Figure 2 Schematic diagram of the structure of the rotating mechanism provided in the embodiment of the present invention Figure 2 ;

[0038] Figure 3 A schematic diagram of the structure of the rotating mechanism provided by an embodiment of the present invention with the protective cover removed;

[0039] Figure 4 An exploded view of a rotating mechanism provided by an embodiment of the present invention;

[0040] Figure 5 A schematic structural diagram of a permanent magnet eddy current brake provided by an embodiment of the present invention;

[0041] Figure 6 A schematic structural diagram of the initial state of the permanent magnet eddy current brake provided by an embodiment of the present invention;

[0042] Figure 7 for Figure 6 Schematic diagram of the structure of the central rotating mechanism without part of the protective cover;

[0043] Figure 8 A schematic structural diagram of a permanent magnet eddy current brake in braking state provided by an embodiment of the invention;

[0044] Figure 9 for Figure 8 Schematic diagram of the structure of the central rotating mechanism without part of the protective cover;

[0045] Figure 10 A schematic structural diagram of a permanent magnet eddy current brake in a relief state provided by an embodiment of the present invention;

[0046] Figure 11 A schematic diagram of the air path in a braking state provided by an embodiment of the present invention;

[0047] Figure 12 A schematic diagram of the gas path in the relief state provided by an embodiment of the present invention;

[0048] Figure 13 Another schematic diagram of an air path in a braking state provided by an embodiment of the present invention;

[0049] Figure 14 Schematic diagram of the internal structure of the rotary cylinder.

[0050] In the picture:

[0051] 1. Rotating mechanism; 2. Protective cover; 21. Opening; 3. Rotating power source; 301. First air outlet; 302. Second air outlet; 31. Rotating cylinder; 311. First chamber; 312. Second chamber; 4. Connecting support; 41. Through hole; 5. Rotating shaft; 6. Bearing; 7. Connecting plate;

[0052] 10. Permanent magnet eddy current brake; 101. Magnetic pole assembly; 1011. Working surface; 102. Connecting beam; 103. Air spring support seat; 1031. Mounting cavity; 104. Air spring; 105. Brake mounting plate; 106. Connecting rod; 107. First control valve; 108. Second control valve; 109. Third control valve; 110. One-way valve; 111. Throttle valve; 112. Yoke. DETAILED DESCRIPTION

[0053] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0054] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0055] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0056] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention. The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the number of the technical features indicated.

[0058] In this description, the "working surface" of the magnetic pole assembly refers to the surface in the magnetization direction. Permanent magnets have a very high magnetic density in the magnetization direction, but very low magnetic density or weak magnetism in other directions. Therefore, when the working surface of the magnetic pole assembly faces the track surface and is within a specified distance, eddy currents are generated between the working surface and the track surface, thereby achieving braking.

[0059] A first aspect of an embodiment of the present invention provides a rotating mechanism for use in a permanent magnet eddy current brake, capable of switching between a braking state and a release state. Figure 5 As shown, the permanent magnet eddy current brake 10 includes a magnetic pole assembly 101 and a connecting beam 102 located above the magnetic pole assembly. The magnetic pole assembly 101 has a working surface 1011 that can generate eddy current effect with the track.

[0060] like Figure 1-Figure 4 As shown, the rotating mechanism 1 provided in the embodiment of the present invention includes:

[0061] The protective cover 2 is provided at the bottom of the connecting beam 102 (see Figure 5 ), and surrounds the outside of the magnetic pole assembly 101 to shield the magnetic pole assembly 101, and an opening 21 is opened along the length direction of the magnetic pole assembly 101 on the side of the protective cover 2 facing the track;

[0062] The rotating power source 3 is provided at the end of the magnetic pole assembly 101, and the rotating power source 3 can drive the magnetic pole assembly 101 to rotate; when the permanent magnet eddy current brake switches from the relief state to the braking state, the magnetic pole assembly 101 can be driven by the rotating power source 3 to rotate until the working surface 1011 is facing the track (see Figure 3 and Figure 9 ), when the permanent magnet eddy current brake switches from the braking state to the relief state, the magnetic pole assembly 101 can be driven by the rotating power source 3 to rotate until the working surface 1011 is shielded in the protective cover 2 (see Figure 7 ).

[0063] The rotating mechanism provided in the embodiment of the present invention is installed near the magnetic pole assembly of the permanent magnetic eddy current brake. Through the cooperation of the protective cover and the rotating power source, the magnetic pole assembly rotates as a whole while the permanent magnetic eddy current brake performs lifting and lowering motion during the braking or relief switching process, so that the working surface of the magnetic pole assembly faces the track surface without shielding during the braking process, and the non-working surface faces the track surface during the relief process. The working surface is shielded in the protective cover, which can effectively shield the magnetic field. The rotating mechanism provided in this embodiment can effectively ensure the switching between the braking state and the relief state of the permanent magnetic eddy current brake, and has a compact structure and high reliability. At the same time, the protective cover also has a protective function, which can prevent the impact of foreign objects on the roadside or adsorption caused by magnetic force when the vehicle is running at high speed, and also provides convenience for subsequent maintenance.

[0064] In some embodiments, as Figure 1-Figure 4 As shown, the rotating mechanism 1 further includes a connecting support 4, the top of which is fixedly connected to the bottom of the connecting beam 102, one side of which is connected to the rotating power source 3, and a through hole 41 is formed in the connecting support 4. A rotating shaft 5 is passed through the through hole 41, one end of which is connected to the output end of the rotating power source 3, and the other end of which is connected to the end of the magnetic pole assembly 101. The connecting support fixes the rotating power source 3, and the rotational motion of the rotating power source 3 is output to the magnetic pole assembly 101 through the rotating shaft 5.

[0065] In some embodiments, as Figure 4 As shown, a bearing 6 is further provided in the through hole 41 , and the rotating shaft 5 is provided in the bearing 6 to facilitate its rotation.

[0066] In some embodiments, as Figure 1-Figure 4 As shown, the rotating mechanism 1 further includes a connecting plate 7, one side of which is fixedly disposed at the end of the magnetic pole assembly 101, and the other side of the connecting plate 7 is adjacent to the connecting support 4 and fixedly connected to the rotating shaft 5. Connecting the magnetic pole assembly 101 to the rotating shaft 5 via the connecting plate 7 can better secure the magnetic pole assembly 101 and more reliably transmit the rotational force.

[0067] In some embodiments, the rotary power source 3 can be a device that can provide driving force, such as a rotary cylinder or a rotary oil cylinder.

[0068] A second aspect of the embodiments of the present invention provides a permanent magnet eddy current brake, which includes the rotating mechanism 1 as described in any one of the above items.

[0069] In some embodiments, as Figure 5-10 As shown, the permanent magnet eddy current brake 10 further includes:

[0070] A magnetic pole assembly 101, both ends of which are connected to the rotary power source 3 of the rotating mechanism 1;

[0071] A connecting beam 102 , the connecting beam 102 is provided on the top of the protective cover 2 of the rotating mechanism 1 ;

[0072] Lifting mechanism, including:

[0073] Air spring support seat 103, air spring support seat 103 is set on the top of the connecting beam 102

[0074] At both ends of the air spring support seat 103, there is a mounting cavity 1031;

[0075] Air spring 104, air spring 104 is installed in the installation cavity 1031, and the top of air spring 104 is connected to the top inner side of air spring support seat 103;

[0076] The brake mounting plate 105 is used to mount the permanent magnet eddy current brake on the bogie. The brake mounting plate 105 is fixedly disposed at the bottom of the air spring 104 .

[0077] Furthermore, it is understandable that if Figure 5 As shown, the permanent magnet eddy current brake comprises two permanent magnet eddy current brake modules, each of which comprises the above components. The two permanent magnet eddy current brake modules are arranged in mirror images of each other and connected at the ends by a connecting rod 106 to form a whole.

[0078] The permanent magnetic eddy current brake with a rotating mechanism provided in this embodiment is installed on the bogie of a rail vehicle. When the vehicle is in emergency braking, the permanent magnetic eddy current brake lowers the magnetic pole assembly to a specified distance from the track surface. At the same time, the magnetic pole assembly rotates under the action of the rotating mechanism until the working surface faces the track surface, generating an eddy current effect on the track for braking; when the brake is relieved, the permanent magnetic eddy current brake raises the magnetic pole assembly. At the same time, the magnetic pole assembly rotates under the action of the rotating mechanism until the working surface is shielded in the protective cover, and the non-working surface of the magnetic pole assembly faces the track surface, effectively shielding the magnetic lines of force, so that the eddy current effect is reduced or even eliminated, thereby eliminating the braking force and achieving the relief function. The permanent magnetic eddy current brake with a rotating mechanism can realize automatic switching between braking and relief states, has high reliability, and can meet the needs of rail vehicle operation.

[0079] In some embodiments, the rotary power source 3 includes a rotary cylinder. The rotary cylinder and air spring 104 are connected by an air circuit and communicate with an air duct. The air circuit is provided with a control component. The control component can control the opening and closing of the air circuit upon receiving a braking or release command to drive the rotary cylinder to rotate. This embodiment fully utilizes the inherent structural characteristics of the permanent magnet eddy current brake and proposes the idea of sharing a pneumatic system with the rotary power source and the air spring. This realizes the conversion of the vertical motion of the air spring into the combined vertical and rotational motion of the magnetic pole assembly, achieving automatic switching between braking and release states without the need for an external power source, resulting in a simple structure and energy conservation.

[0080] Figure 11-13 A specific embodiment is shown in which the rotary power source 3 and the air spring 104 share a pneumatic system. Figure 11-13 In the figure, two sets of air springs 104 and two sets of rotary cylinders 31 are used as an example. The two sets of air springs 104 are connected in series to the air duct, and the two sets of rotary cylinders 31 are connected in parallel. In addition, it should be understood that the present application is not limited to the number and connection method shown in the drawings. Under the same principle, other configurations that can achieve the same effect can also be configured.

[0081] The rotating cylinder 31 and the air spring 104 are both connected to the air duct. The rotating cylinder 31 has a first air port 301 and a second air port 302. The control component includes a first control valve 107, a second control valve 108 and a third control valve 109 arranged on the air duct, wherein: the first control valve 107 is arranged on the air duct, and the same side of the first control valve 107 has a first port 1071 and a second port 1072. The first air port 301 and the air spring 104 are both connected to the first port 1071 of the first control valve 107, and the second air port 302 is connected to the second port 1072 of the first control valve 107; the air spring 104 is connected to the second port 1072 of the first control valve 107 through the second control valve. The control valve 108 is connected to the second air port 302, and a one-way valve 110 is provided on the passage connecting the air spring 104 and the second air port 302. The air inlet of the one-way valve 110 is connected to the air spring 104, and the air outlet of the one-way valve 110 is connected to the second air port 302, so that only the gas in the air spring 104 is allowed to flow to the second air port 302, and the gas in the rotating cylinder 31 is not allowed to flow from the second air port 302 to the air spring 104; the first air port 301 and the air spring 104 are both connected to the outside world through the third control valve 109, and the port of the third control valve 109 connected to the outside world is provided with a throttle valve 111.

[0082] In order to facilitate the understanding of the entire system principle, the relevant structure of the rotary cylinder 31 is briefly described here. Figure 14As shown, the rotary cylinder 31 includes a rotating shaft and a first chamber 311 and a second chamber 312 separated by a swing piston. The air outlet of the first chamber 311 is the first air outlet 301, and the air outlet of the second chamber 312 is the second air outlet 302. Here, the structure of the rotary cylinder 31 is the existing technology, and the rest of the structure is not repeated.

[0083] like Figure 11 As shown, when a braking command is received, the first port 1071 and the second port 1072 of the first control valve 107 are both closed, and the second control valve 108 and the third control valve 109 are opened. Due to the presence of the throttle valve 111, the air spring 104 is exhausted, and at the same time, the gas in the first chamber 311 is discharged from the first air port 301, and the exhausted gas enters the second chamber 312 through the second air port 302. Since the effective area of the second chamber 312 is larger than the effective area of the first chamber 311, the rotary cylinder 31 is driven to rotate, driving the magnetic pole assembly 101 to rotate until the working surface 1011 is facing the track for braking.

[0084] like Figure 12 As shown, when a relief instruction is received, the second control valve 108 and the third control valve 109 are closed, and the first port 1071 of the first control valve 107 is forward-conducted, that is, the gas in the air duct enters the air spring 104 through the first port 1071, and enters the first chamber 311 through the first air port 301. At the same time, the second port 1072 of the first control valve 107 is reverse-conducted, that is, the gas in the second chamber 312 is discharged through the second air port 302 and discharged through the second port 1072 of the first control valve 107.

[0085] In some embodiments, the first control valve 107 is a three-position five-way valve, and the second control valve 108 and the third control valve 109 are two-position two-way valves.

[0086] In some embodiments, as Figure 13 As shown, in the braking state, when it is detected that the rotating cylinder 31 has not rotated to the right position or the set time has been reached, the second port 1072 of the first control valve 107 is forward-conducted, and at the same time the first port 1071 is reverse-conducted, the second control valve 108 and the third control valve 109 are closed, and the gas in the air duct enters through the second port 1072 and is directly filled into the second chamber 312 through the second air port 302.

[0087] In some embodiments, the flow rate through the throttle valve 111 is adjustable, so that the exhaust speed can be adjusted according to actual needs.

[0088] In some embodiments, as Figure 4 As shown, a magnetic yoke 112 is installed on the other side of the magnetic pole assembly 101 away from the working surface 1011 and on both side surfaces.

[0089] A third aspect of an embodiment of the present invention provides a rail vehicle, comprising a bogie, on which a permanent magnetic eddy current brake 10 as described in any of the above items is provided. The rail vehicle can automatically switch between a braking state and a relief state, and effectively prevents the generation of braking force in the relief state, thereby improving operational safety. In addition, the other positive technical effects of the rotating mechanism and the permanent magnetic eddy current brake in the above embodiments are also applicable to rail vehicles and will not be elaborated here.

[0090] The switching process between the braking state and the release state of an embodiment of the permanent magnet eddy current brake of the present invention is described below with reference to the accompanying drawings. In order to clearly show the rotation state of the magnetic pole assembly 101, Figure 6 、 Figure 8 and Figure 10 Remove the protective cover 2; Figure 7 and Figure 9 Remove a portion of the protective cover 2.

[0091] 1. Initial state of permanent magnet eddy current brake

[0092] like Figure 6 and Figure 7 As shown, when the rail vehicle operates normally, the air spring 104 remains in an inflated state, and the air spring support seat 103 remains in a raised position under the thrust of the air spring 104, thereby ensuring that the connecting beam 102 and the magnetic pole assembly 101 are in a raised position and maintain a distance from the track.

[0093] At this time, the working surface of the magnetic pole assembly 101 is shielded in the protective cover 2 of the rotating mechanism 1, and the non-working surface of the magnetic pole assembly 101 faces the track, thereby effectively weakening the magnetic force between the magnetic pole assembly 101 and the track and ensuring the normal operation of the rail vehicle.

[0094] 2. Braking with permanent magnet eddy current brake

[0095] like Figure 8 and Figure 9 As shown, when the rail vehicle brakes, the air spring 104 is exhausted, and under the support of the brake mounting plate 105, the air spring support seat 103 moves downward as the gas decreases, causing the connecting beam 102 fixed on the lower surface of the air spring support seat 103 to move downward, thereby driving the magnetic pole assembly 101 fixed under the connecting beam 102 to move downward.

[0096] During the above process, the entire rotating mechanism 1 moves downward driven by the connecting beam 102. Since the air spring 104 and the rotating power source 3 share a pneumatic system, when the air spring 104 discharges gas, the rotating power source 3 will push the connecting plate 7 and the magnetic pole assembly 101 fixed together to rotate until the working surface of the magnetic pole assembly 101 faces the track and is at a specified distance from the track surface. The permanent magnet eddy current brake generates an eddy current effect with the track, thereby generating braking force.

[0097] 3. Permanent magnet eddy current brake for relief

[0098] like Figure 10 As shown, when the vehicle is relieved, the air spring 104 is inflated, and the upper part of the air spring support seat 103 begins to move upward under the lifting action of the air spring 4, thereby driving the connecting beam 102 fixed below the air spring support seat 103 to move upward, and then driving the connecting support 4 fixed to the bottom of the connecting beam 102 to move upward. The movement of the connecting support 4 drives the rotating mechanism 1 to move upward, so that the magnetic pole assembly 101 is away from the track surface.

[0099] In the above process, the entire rotating mechanism 1 moves upward under the drive of the connecting beam 102. Since the air spring 104 and the rotating power source 3 share a pneumatic system, during the inflation of the air spring 104, the rotating power source 3 will push the connecting plate 7 and the magnetic pole assembly 101 fixed together to perform a rotational motion. The combined motion of the vertical motion and the rotational motion increases the distance between the magnetic pole assembly 101 and the track surface. At the same time, the working surface 1011 of the magnetic pole assembly 101 gradually rotates into the protective cover 2, and the non-working surface gradually faces the track. The final state is as follows. Figure 6 and Figure 7 As shown, the eddy current effect is reduced or even disappears, so that the braking force disappears and the relief function is achieved.

[0100] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A rotating mechanism for use in a permanent magnet eddy current brake, the permanent magnet eddy current brake comprising a magnetic pole assembly and a connecting beam disposed above the magnetic pole assembly, the magnetic pole assembly having a working surface capable of generating an eddy current effect with a track, characterized in that: The rotating mechanism comprises: a protective cover, the protective cover being arranged at the bottom of the connecting beam and surrounding the outside of the magnetic pole assembly to shield the magnetic pole assembly, the protective cover having an opening on a side facing the track along the length direction of the magnetic pole assembly; A rotating power source is provided at the end of the magnetic pole assembly, and the rotating power source can drive the magnetic pole assembly to rotate; when the permanent magnetic eddy current brake is switched from a relief state to a braking state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface is opposite to the track; when the permanent magnetic eddy current brake is switched from a braking state to a relief state, the magnetic pole assembly can be driven by the rotating power source to rotate until the working surface is shielded in the protective cover.

2. The rotating mechanism according to claim 1, wherein: It also includes a connecting support, the top of which is fixedly connected to the bottom of the connecting beam, one side of which is connected to the rotating power source, the connecting support is provided with a through hole, a rotating shaft is passed through the through hole, one end of the rotating shaft is connected to the output end of the rotating power source, and the other end of the rotating shaft is connected to the end of the magnetic pole assembly.

3. The rotating mechanism according to claim 2, wherein: A bearing is also provided in the through hole to facilitate the rotation of the rotating shaft.

4. The rotating mechanism according to claim 2, wherein: It also includes a connecting plate, one side of which is fixedly arranged on the end of the magnetic pole assembly, and the other side of the connecting plate is adjacent to the connecting support and fixedly connected to the rotating shaft.

5. A permanent magnet eddy current brake, characterized in that: The invention comprises a rotating mechanism as described in any one of claims 1 to 4.

6. The permanent magnet eddy current brake according to claim 5, characterized in that: Also includes: a magnetic pole assembly, both ends of which are connected to the rotary power source of the rotating mechanism; a connecting beam, the connecting beam being arranged on the top of the protective cover of the rotating mechanism; A lifting mechanism, comprising: An air spring support seat, the air spring support seat is arranged at both ends of the top of the connecting beam, and the air spring support seat has a mounting cavity; An air spring is installed in the installation cavity, and the top of the air spring is connected to the inner side of the top of the air spring support seat; A brake mounting plate is used to mount the permanent magnet eddy current brake on the bogie, and the brake mounting plate is fixedly arranged on the bottom of the air spring.

7. The permanent magnet eddy current brake according to claim 6, characterized in that: The rotary power source includes a rotary cylinder, the rotary cylinder and the air spring are connected through an air circuit and are both connected to an air duct, and a control component is provided on the air circuit, and the control component can control the opening and closing of the air circuit when receiving a braking or relief instruction.

8. The permanent magnet eddy current brake according to claim 7, characterized in that: The rotary cylinder has a first air port and a second air port, and the control component includes a first control valve, a second control valve and a third control valve arranged on the air path, the first control valve is arranged on the air duct, and a first port and a second port are provided on the same side of the first control valve, the first air port and the air spring are both connected to the first port of the first control valve, and the second air port is connected to the second port of the first control valve; the air spring is connected to the second air port through the second control valve, and a one-way valve is provided on the passage connecting the air spring and the second air port, the air inlet of the one-way valve is connected to the air spring, and the air outlet of the one-way valve is connected to the second air port; the first air port and the air spring are both connected to the outside world through the third control valve, and the port of the third control valve connected to the outside world is provided with a throttle valve; When a braking command is received, the first port and the second port of the first control valve are both closed, the second control valve and the third control valve are opened, the air spring is exhausted, and at the same time, the gas in the rotating cylinder is discharged from the first air port, and the exhausted gas enters the rotating cylinder through the second air port, driving the rotating cylinder to rotate; When a relief instruction is received, the second control valve and the third control valve are closed, and the first port of the first control valve is forward-conducted so that the gas in the air duct enters the air spring and enters the rotating cylinder through the first air port. At the same time, the second port of the first control valve is reverse-conducted so that the gas in the rotating cylinder is discharged through the second air port, driving the rotating cylinder to rotate.

9. The permanent magnet eddy current brake according to claim 8, characterized in that: In the braking state, when it is detected that the rotating cylinder has not rotated to the right position or the set time has been reached, the second port of the first control valve is forward-conducted and the first port is reverse-conducted. At the same time, the second control valve and the third control valve are closed, so that the gas in the air duct directly enters the rotating cylinder through the second air port.

10. A rail vehicle comprising a bogie, characterized in that: The bogie is provided with a permanent magnet eddy current brake as described in any one of claims 5 to 9.

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