An emergency support guide shoe suitable for superconducting electric magnetic levitation in low vacuum pipelines

Abstract

The present invention relates to the technical field of magnetic levitation vehicle running mechanisms, and discloses an emergency support and guide shoe suitable for low-vacuum pipeline superconducting electric magnetic levitation. The emergency support and guide shoe comprises a wear plate, a mounting base, a primary metal rubber member, a secondary metal rubber member, and a fastener. The lower surface of the wear plate is provided with an inclined surface for contacting the track, the upper surface of the wear plate is provided with a boss, the primary metal rubber member is mounted on the boss, the mounting base is used to connect to the suspension frame, and one end is provided with an open groove that cooperates with the primary metal rubber member, and the other end is provided with a mounting groove. The bottom of the open groove and the bottom of the mounting groove are connected by a through hole. The mounting base is mounted on the primary metal rubber member through the open groove, the secondary metal rubber member is disposed in the mounting groove, and the fastener passes through the secondary metal rubber member and the through hole to connect to the boss.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic levitation vehicle running mechanisms, in particular to an emergency support guide sliding shoe suitable for superconducting electric magnetic levitation in low vacuum pipelines. Background Art

[0002] When a maglev train using the Superconducting Electric Maglev (EDS) system operates, the magnetic field of the onboard superconducting magnets cuts through the ground coils, generating induced currents and magnetic fields. The magnetic field of the onboard superconducting magnets interacts with the induced magnetic field of the ground coils to generate electromagnetic levitation and guidance forces, enabling the train to levitate and guide. This system offers strong load-bearing capacity, high levitation height, and low track accuracy requirements, making it a key development direction for high-speed and ultra-high-speed rail transit. To improve economic efficiency, EDS maglev trains typically have two suspension frames installed under each car body, or use an articulated marshaling system with adjacent cars sharing a single suspension frame. If the magnets quench, the train loses all or part of the electromagnetic levitation and guidance force, posing a significant risk of collision with the tracks. Therefore, emergency support and guidance devices are essential to provide reliable mechanical support and guidance for the maglev after the quench.

[0003] An emergency support guide wheel device has been proposed in the prior art. The rotating parts of the bearing, such as the roller and inner ring, of the device are made of non-magnetic and non-conductive ceramic materials. This device can solve the problems of eddy current heat, electro-corrosion and grease solidification of the bearing caused by the high-speed rotation of the wheel body cutting the magnetic field of the superconducting magnet. At the same time, it relies on the rubber pad between the outer ring of the bearing and the mounting seat to reduce vibration.

[0004] However, the devices in the prior art have the following disadvantages: First, the load-bearing capacity and maximum speed of the ceramic bearings are limited. When bearing the weight of the train, they can only provide short-term support and guidance after a quench at a speed of about 550 km / h. If the use time exceeds the range, it is easy to cause structural damage and grease solidification due to frictional heat, and the durability is low; Second, the ceramic bearings have poor impact resistance. Buffering and vibration reduction are achieved by adding a rubber ring between the bearing outer ring and the bearing mounting bracket. Due to size limitations, the rubber ring's buffering and vibration reduction performance is limited and the damping is relatively small. After a quench and fall, the ceramic bearings and the vehicle are subjected to a large impact and there is a risk of multiple bounces and falls. Therefore, high requirements are placed on the strength and rigidity of the ceramic bearings and the overall structure of the train, which is not conducive to lightweighting; Third, the wheel body is directly in contact with the track and is subjected to extremely large impact, so metal materials still need to be used. During use, the wheel body rotates at high speed to cut through the strong magnetic field generated by the superconducting magnet, and there are still problems with eddy current heat and eddy current resistance. Summary of the Invention

[0005] The present invention provides an emergency support guide shoe suitable for superconducting electric magnetic levitation in a low vacuum pipeline, which can solve the technical problems in the prior art.

[0006] The present invention provides an emergency support and guide shoe suitable for superconducting electric magnetic levitation in a low vacuum pipeline, wherein the emergency support and guide shoe includes a wear plate, a mounting base, a main metal rubber part, a secondary metal rubber part and a fastener, the lower surface of the wear plate is provided with an inclined surface for contacting the track, the upper surface of the wear plate is provided with a boss, the main metal rubber part is sleeved on the boss, the mounting base is used to be connected to the suspension frame and is provided with an open groove matching the main metal rubber part at one end, and a mounting groove is provided at the other end, the bottom of the open groove and the bottom of the mounting groove are connected by a through hole, the mounting base is sleeved on the main metal rubber part through the open groove, the secondary metal rubber part is provided in the mounting groove, and the fastener passes through the secondary metal rubber part and the through hole to be connected to the boss.

[0007] Preferably, the main metal rubber part and the secondary metal rubber part are annular structures, the inner diameter of the main metal rubber part is larger than the inner diameter of the secondary metal rubber part, the outer diameter of the main metal rubber part is larger than the outer diameter of the secondary metal rubber part, and the height of the main metal rubber part is greater than the height of the secondary metal rubber part.

[0008] Preferably, the fastener is a fastening screw, the boss is provided with a threaded hole, and the fastening screw is matched and connected with the threaded hole.

[0009] Preferably, the mounting base is connected to the suspension frame via a connecting piece.

[0010] Preferably, the wear plate is made of austenitic stainless steel or titanium alloy.

[0011] Preferably, the mounting base is made of austenitic stainless steel or titanium alloy.

[0012] Preferably, the main metal rubber component and the secondary metal rubber component are made of austenitic stainless steel wire or alloy wire.

[0013] Preferably, the fastener is made of austenitic stainless steel or titanium alloy.

[0014] Through the above technical solution, a sliding shoe type emergency support structure is adopted to replace the wheel type emergency support structure, and there is no need to set up high-speed rotating parts, which solves the problem of eddy current heat and eddy current resistance generated by the metal wheel body cutting the magnetic field at high speed; there is no need to use ceramic bearings, so that the use of sliding shoes is not limited by the load and maximum speed of ceramic bearings; and metal rubber is used as a buffering and vibration isolation element, which has a high damping ratio of 0.1-0.2 and a high heat resistance of not less than 400℃-600℃. After the sliding shoes are assembled, they have a certain range of six-degree-of-freedom movement space, so as to adapt to different falling postures, with strong buffering and vibration reduction performance and small maximum overload of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the embodiments of the present invention, constitute a part of the specification, illustrate the embodiments of the present invention, and together with the description, explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0016] Figure 1 A three-dimensional diagram of an emergency support and guide shoe suitable for superconducting electric magnetic levitation in a low vacuum pipeline according to an embodiment of the present invention is shown;

[0017] Figure 2 A cross-sectional view of an emergency support guide shoe suitable for superconducting electric magnetic levitation in a low vacuum pipeline according to an embodiment of the present invention is shown.

[0018] Description of Reference Numerals

[0019] 1 Wear plate; 2 Mounting base;

[0020] 4 Main metal rubber parts; 5 Secondary metal rubber parts; 6 Fasteners. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0024] like Figure 1 and 2 As shown, an embodiment of the present invention provides an emergency support and guide shoe suitable for superconducting electric magnetic levitation in a low vacuum pipeline, wherein the emergency support and guide shoe includes a wear plate 1, a mounting base 2, a main metal rubber part 4, a secondary metal rubber part 5 and a fastener 6. The lower surface of the wear plate 1 is provided with an inclined surface for contacting the track, the upper surface of the wear plate 1 is provided with a boss, the main metal rubber part 4 is sleeved on the boss, the mounting base 2 is used to connect with the suspension frame and is provided with an open groove matching the main metal rubber part 4 at one end, and a mounting groove is provided at the other end. The bottom of the open groove and the bottom of the mounting groove are connected by a through hole. The mounting base 2 is sleeved on the main metal rubber part 4 through the open groove, the secondary metal rubber part 5 is provided in the mounting groove, and the fastener 6 passes through the secondary metal rubber part 5 and the through hole to be connected to the boss.

[0025] The fasteners connect to the boss from top to bottom, securing the primary and secondary metal rubber components in their respective mounting slots. This allows the primary and secondary metal rubber components, mounting base, and wear plate to form a single unit. When a train falls due to a quench in the superconducting magnet, the primary and secondary metal rubber components compress and deform based on the train's falling posture, providing six-degree-of-freedom cushioning and vibration reduction while ensuring contact between the wear plate and the track.

[0026] Through the above technical solution, a sliding shoe type emergency support structure is adopted to replace the wheel type emergency support structure, and there is no need to set up high-speed rotating parts, which solves the problem of eddy current heat and eddy current resistance generated by the metal wheel body cutting the magnetic field at high speed; there is no need to use ceramic bearings, so that the use of sliding shoes is not limited by the load and maximum speed of ceramic bearings; and metal rubber is used as a buffering and vibration isolation element, which has a high damping ratio of 0.1-0.2 and a high heat resistance of not less than 400℃-600℃. After the sliding shoes are assembled, they have a certain range of six-degree-of-freedom movement space, so as to adapt to different falling postures, with strong buffering and vibration reduction performance and small maximum overload of the train.

[0027] The emergency support and guide shoes described in the present invention can be installed on the bottom and sides of the train, typically on a suspension frame. For example, each suspension frame can be equipped with four sets of the emergency support and guide shoes described in the present invention on the bottom, and two sets on each side.

[0028] According to one embodiment of the present invention, the inclined surface provided on the lower surface of the wear plate 1 can be formed by chamfering both ends of the wear plate 1 .

[0029] According to one embodiment of the present invention, the main metal rubber part 4 and the secondary metal rubber part 5 are annular structures, and the inner diameter of the main metal rubber part 4 is larger than the inner diameter of the secondary metal rubber part 5, the outer diameter of the main metal rubber part 4 is larger than the outer diameter of the secondary metal rubber part 5, and the height of the main metal rubber part 4 is greater than the height of the secondary metal rubber part 5.

[0030] The main metal rubber parts are larger in size and have a greater compressibility, providing the train with cushioning and vibration isolation in all directions during a train drop and subsequent operation; while the secondary metal rubber parts are smaller in size, which can ensure the relative movement between the fasteners and the mounting base, while providing a certain cushioning and vibration isolation capability in the axial direction.

[0031] According to an embodiment of the present invention, the fastener 6 is a fastening screw, the boss is provided with a threaded hole, and the fastening screw is matched and connected with the threaded hole.

[0032] According to an embodiment of the present invention, the mounting base 2 is connected to the suspension frame via a connecting piece.

[0033] For example, the connecting member is a screw.

[0034] According to one embodiment of the present invention, the material of the wear plate 1 is austenitic stainless steel (for example, austenitic stainless steel 0Cr18Ni9Ti) or titanium alloy (for example, titanium alloy TC4).

[0035] For example, the wear plate may be integrally machined from austenitic stainless steel or titanium alloy.

[0036] The use of these materials can reduce rail wear while ensuring manageable wear on the wear plate itself. Furthermore, by calculating and testing the heat flux distribution coefficient and wear of the friction pair during design, it is possible to ensure that the wear plate's thickness covers the wear while also providing sufficient high-temperature strength.

[0037] According to an embodiment of the present invention, the material of the mounting base 2 is austenitic stainless steel or titanium alloy.

[0038] For example, the mounting base is integrally machined from austenitic stainless steel or titanium alloy, and is provided with mounting holes (e.g., threaded holes) for fixing the mounting base to the suspension frame. The mounting base is connected to the main metal rubber part, the auxiliary metal rubber part, and the wear plate as a whole by fastening screws.

[0039] According to an embodiment of the present invention, the main metal rubber component 4 and the auxiliary metal rubber component 5 are made of austenitic stainless steel wire or alloy wire.

[0040] For example, the primary metal rubber component 4 and the secondary metal rubber component 5 may be homogeneous elastic porous buffer vibration reduction elements formed by pressing austenitic stainless steel wire or high-temperature alloy wire.

[0041] Therefore, the main metal rubber component and the auxiliary metal rubber component can have high temperature resistance and high damping ratio characteristics.

[0042] The high temperature alloy wire may be, for example, GH4169 alloy wire.

[0043] By rationally designing the stiffness of the primary metal rubber member and the secondary metal rubber member, it is possible to ensure that the lateral overload coefficient of the suspension frame and the train body is no greater than 3 and the vertical overload coefficient is no greater than 5 when the timeout period is exceeded. In order to avoid obscuring the present invention, this will not be described in detail.

[0044] According to an embodiment of the present invention, the material of the fastener 6 is austenitic stainless steel or titanium alloy.

[0045] For example, the fastening screw is made of austenitic stainless steel or titanium alloy through integral machining, and one end of the screw is threaded, which is used to connect the main metal rubber part, the auxiliary metal rubber part, the mounting base and the wear plate into a whole. After the connection, the device has a certain range of six-degree-of-freedom motion space and six-degree-of-freedom buffering and vibration isolation capabilities.

[0046] In addition, for the emergency support guide sliding shoe of the present invention, compressible amounts are reserved in the axial and radial directions.

[0047] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An emergency support guide shoe suitable for superconducting electric magnetic levitation in low vacuum pipelines, characterized in that: The emergency support guide shoe comprises a wear plate (1), a mounting base (2), a main metal rubber part (4), a secondary metal rubber part (5) and a fastener (6), wherein the lower surface of the wear plate (1) is provided with an inclined surface for contacting the rail, the upper surface of the wear plate (1) is provided with a boss, the main metal rubber part (4) is sleeved on the boss, the mounting base (2) is used to connect with the suspension frame and is provided with an open groove matching the main metal rubber part (4) at one end, and a mounting groove at the other end, the bottom of the open groove and the bottom of the mounting groove are connected by a through hole, and the mounting base (2) is sleeved on the upper surface through the open groove. On the main metal rubber part (4), the auxiliary metal rubber part (5) is arranged in the installation groove, the fastener (6) passes through the auxiliary metal rubber part (5) and the through hole and is connected to the boss, the main metal rubber part (4) and the auxiliary metal rubber part (5) are annular structures, and the inner diameter of the main metal rubber part (4) is larger than the inner diameter of the auxiliary metal rubber part (5), the outer diameter of the main metal rubber part (4) is larger than the outer diameter of the auxiliary metal rubber part (5), the height of the main metal rubber part (4) is larger than the height of the auxiliary metal rubber part (5), and the mounting base (2) is connected to the suspension frame through a connecting part.

2. The emergency support guide shoe according to claim 1, characterized in that: The fastener (6) is a fastening screw, the boss is provided with a threaded hole, and the fastening screw is matched and connected with the threaded hole.

3. The emergency support guide shoe according to claim 1 or 2, characterized in that: The material of the wear plate (1) is austenitic stainless steel or titanium alloy.

4. The emergency support guide shoe according to claim 1 or 2, characterized in that: The material of the mounting base (2) is austenitic stainless steel or titanium alloy.

5. The emergency support guide shoe according to claim 1 or 2, characterized in that: The main metal rubber part (4) and the auxiliary metal rubber part (5) are made of austenitic stainless steel wire or alloy wire.

6. The emergency support guide shoe according to claim 1 or 2, characterized in that: The material of the fastener (6) is austenitic stainless steel or titanium alloy.

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