Ultrahigh-speed magnetic suspension vehicle-mounted refrigerating system

Abstract

The invention relates to the technical field of ultra-high-speed magnetic suspension, and discloses an ultra-high-speed magnetic suspension vehicle-mounted refrigerating system. The system comprises a refrigerating machine head, an end cover flange, a damper, a buffering corrugated pipe, a low-temperature storage tank, a vehicle-mounted compressor, a first buffering vibration reduction unit and a second buffering vibration reduction unit, the refrigerating machine head is connected with the end cover flange, the damper is arranged between the end cover flange and the low-temperature storage tank, one end of the buffering corrugated pipe is connected with the end cover flange, and the other end of the buffering corrugated pipe is connected with the vehicle-mounted compressor. One end of the vehicle-mounted compressor is connected with the low-temperature storage tank, the other end of the vehicle-mounted compressor is connected with the low-temperature storage tank, the first buffering and damping unit is arranged at the bottom of the vehicle-mounted compressor, the second buffering and damping unit is arranged on the side face of the vehicle-mounted compressor, and the vehicle-mounted compressor is connected with the ultra-high-speed magnetic suspension vehicle body through the Therefore, reliable output of the refrigerating capacity of the refrigerating system can be ensured, and meanwhile vibration and impact energy transmitted to the compressor and the cold head can be buffered and attenuated.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-high-speed magnetic levitation, and in particular to an ultra-high-speed magnetic levitation vehicle-mounted refrigeration system. Background Art

[0002] The refrigeration system onboard the ultra-high-speed maglev train is the core equipment for cooling the superconducting magnets and maintaining their low-temperature working environment in electric maglev trains and ultra-high-speed vacuum pipeline maglev trains. When the superconducting magnet enters the superconducting state, its operating temperature is 4.2K (low-temperature superconducting magnets) and 20K~77K (high-temperature superconducting magnets). The refrigeration system is installed on the high-speed maglev train to continuously and stably provide cooling capacity for the superconducting magnets, thereby ensuring the long-term operation of the superconducting magnets over long distances.

[0003] The operation of ultra-high-speed maglev trains can be divided into different operation stages, including low-speed taxiing → floating → high-speed suspension → landing braking. During low-speed taxiing and landing braking, the on-board skids or supporting guide wheels come into contact with the ground, which will inevitably cause vibration or impact in the on-board low-temperature refrigeration system. The on-board refrigeration system is mainly composed of the cold head of the refrigerator, the low-temperature storage tank, the compressor and other parts, which contain sensitive electronic components (the electronic control part of the refrigeration system), moving pistons (compressor pump group, cold head) and other moving mechanisms. The external vibration environment can easily cause the reliability of electronic components to be reduced and damaged, the wear of the moving mechanism to be aggravated, and the cold head structure to be damaged. Therefore, the on-board low-temperature refrigeration system of ultra-high-speed maglev applications must consider vibration suppression to ensure the reliable and stable operation of the low-temperature system, but there is no relevant vibration suppression technology in the existing technology. Summary of the invention

[0004] The invention provides an ultra-high-speed magnetic suspension vehicle-mounted refrigeration system, which can solve the technical problems in the prior art.

[0005] The present invention provides an ultra-high-speed magnetic levitation vehicle-mounted refrigeration system, wherein the system comprises a refrigerator head, an end cover flange, a damper, a buffer bellows, a cryogenic storage tank, a vehicle-mounted compressor, a first buffer vibration reduction unit and a second buffer vibration reduction unit, the refrigerator head is connected to the end cover flange, the damper is arranged between the end cover flange and the cryogenic storage tank, one end of the buffer bellows is connected to the end cover flange, and the other end is connected to the cryogenic storage tank, the first buffer vibration reduction unit is arranged at the bottom of the vehicle-mounted compressor, the second buffer vibration reduction unit is arranged on the side of the vehicle-mounted compressor, and the vehicle-mounted compressor is connected to the ultra-high-speed magnetic levitation vehicle body through the first buffer vibration reduction unit and the second buffer vibration reduction unit.

[0006] Preferably, the first buffer vibration reduction unit and the second buffer vibration reduction unit both use multi-stage buffer vibration reduction elements, and the multi-stage buffer vibration reduction elements are used in series or in parallel.

[0007] Preferably, the first buffer vibration reduction unit and the second buffer vibration reduction unit both include a buffer unit and a vibration reduction and damping unit.

[0008] Preferably, the buffer unit comprises at least one of the following: a helical steel spring, an air spring, a rubber spring, a metal rubber spring, a steel wire spring and an elastic metal.

[0009] Preferably, the vibration reduction and damping unit includes at least one of the following: a hydraulic damper, an air damper, a friction damper, an electromagnetic damper and a metal plastic deformation damper.

[0010] Preferably, the damper is an annular rubber damper or an annular metal rubber damper.

[0011] Preferably, the material of the annular rubber damper is polyurethane.

[0012] Preferably, the buffer bellows is a metal bellows.

[0013] Preferably, the buffer bellows is connected to the end cover flange and the cryogenic storage tank by welding.

[0014] Through the above technical solution, a buffering and vibration reduction unit can be set between the compressor and the vehicle-mounted equipment installation interface, and a flexible sealing connection can be added between the refrigerator cold head and the low-temperature storage tank, so as to ensure the reliable output of the refrigeration system while buffering and attenuating the vibration and impact energy transmitted to the compressor and the cold head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of an ultra-high-speed magnetic levitation vehicle-mounted refrigeration system according to an embodiment of the present invention is shown;

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of the middle circle position;

[0018] Figure 3 A schematic diagram of a vehicle-mounted compressor according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] 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 by no means 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 creative work are within the scope of protection of the present invention.

[0020] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​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 accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] Figure 1 A schematic diagram of an ultra-high-speed magnetic levitation vehicle-mounted refrigeration system according to an embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of a vehicle-mounted compressor according to an embodiment of the present invention is shown.

[0024] like Figure 1 and 3As shown, an embodiment of the present invention provides an ultra-high-speed magnetic levitation vehicle-mounted refrigeration system, wherein the system includes a refrigerator head (the part of the refrigeration system that outputs cold energy) 1, an end cover flange 2, a damper 3, a buffer bellows 4, a low-temperature storage tank 5, a vehicle-mounted compressor 6, a first buffer vibration reduction unit 7 and a second buffer vibration reduction unit 8, the refrigerator head 1 is connected to the end cover flange 2, the damper 3 is arranged between the end cover flange 2 and the low-temperature storage tank 5, one end of the buffer bellows 4 is connected to the end cover flange 2, and the other end is connected to the low-temperature storage tank 5, the first buffer vibration reduction unit 7 is arranged at the bottom of the vehicle-mounted compressor 6, the second buffer vibration reduction unit 8 is arranged on the side of the vehicle-mounted compressor 6, and the vehicle-mounted compressor 6 is connected to the ultra-high-speed magnetic levitation vehicle body through the first buffer vibration reduction unit 7 and the second buffer vibration reduction unit 8.

[0025] Through the above technical solution, a buffering and vibration reduction unit can be set between the compressor and the vehicle-mounted equipment installation interface, and a flexible sealing connection can be added between the refrigerator cold head and the low-temperature storage tank, so as to ensure the reliable output of the refrigeration system while buffering and attenuating the vibration and impact energy transmitted to the compressor and the cold head.

[0026] Specifically, the vibration energy is consumed by the damper 3, and the vibration load transmitted to the cold head 1 of the refrigerator by the low-temperature storage tank (providing a high vacuum environment for the cold head of the refrigerator and providing a storage space for the refrigerant medium) 5 is buffered by the buffer bellows 4. The vehicle-mounted compressor 6 is fixedly mounted on the vehicle body equipment installation interface through the buffer vibration reduction units at the bottom and sides. During the low-speed taxiing or landing process, the support guide wheels or sliding shoes on the vehicle body contact the ground to generate vibration and impact loads, which are transmitted to the vehicle body equipment installation interface. The left side 71 of the first buffer vibration reduction unit 7 and the lower side 81 of the second buffer vibration reduction unit 8 are compressed or stretched due to the vibration of the interface. The deformation of the buffer vibration reduction unit prolongs the impact load action time, and reduces or eliminates the force load transmitted to the compressor. The damping of the right side 72 of the first buffer vibration reduction unit 7 and the upper side 82 of the second buffer vibration reduction unit 8 consumes vibration and impact energy in the whole process, so that the vibration gradually decays.

[0027] When the vibration impact load is transmitted to the cryogenic storage tank 5, the buffer bellows 4 is elastically deformed, reducing or eliminating the force load transmitted to the refrigerator cold head 1. At the same time, the setting of the buffer bellows 4 can ensure that the refrigerator cold head 1 and the interior of the cryogenic storage tank 5 are in a high vacuum state, reducing heat leakage; the damper 3 is deformed due to extrusion, and the vibration energy is consumed through the internal friction of the material, so that the vibration gradually decays.

[0028] The above-mentioned buffer vibration reduction element can suppress vibration in six degrees of freedom in space, including translation vibration suppression in three directions and rotational vibration suppression in three directions. The buffer stiffness and vibration reduction damping coefficient of the vehicle-mounted compressor can adopt linear or nonlinear parameters.

[0029] The refrigerator head 1 is connected to the end cover flange 2 via a sealing connection interface on the end cover flange 2 .

[0030] According to one embodiment of the present invention, limiting grooves are provided on the end cover flange 2 and the low-temperature storage tank 5, the damper 3 is clamped in the limiting grooves of the end cover flange 2 and the limiting grooves of the low-temperature storage tank 5, and the damper 3 is further fixed to the limiting grooves by bonding.

[0031] Alternatively, the damper 3 and the limiting groove may be further fixed by bolts.

[0032] According to an embodiment of the present invention, both the first buffer vibration reduction unit 7 and the second buffer vibration reduction unit 8 use multi-stage buffer vibration reduction elements, and the multi-stage buffer vibration reduction elements are used in series or in parallel.

[0033] Alternatively, the first buffer and vibration damping unit 7 and the second buffer and vibration damping unit 8 may also only use primary buffer and vibration damping elements.

[0034] In addition to the first buffer vibration reduction unit and the second buffer vibration reduction unit described above, a third buffer vibration reduction unit arranged on the top surface of the vehicle-mounted compressor may also be included.

[0035] For example, the first buffer vibration reduction unit, the second buffer vibration reduction unit and the third buffer vibration reduction unit can be installed by hoisting, and the first buffer vibration reduction unit, the second buffer vibration reduction unit and the third buffer vibration reduction unit can be placed vertically or horizontally.

[0036] According to an embodiment of the present invention, both the first buffer and vibration reduction unit 7 and the second buffer and vibration reduction unit 8 include a buffer unit and a vibration reduction and damping unit.

[0037] According to an embodiment of the present invention, the buffer unit includes at least one of the following: a spiral steel spring, an air spring, a rubber spring, a metal rubber spring, a steel wire spring and an elastic metal.

[0038] According to an embodiment of the present invention, the vibration reduction and damping unit includes at least one of the following: a hydraulic damper, an air damper, a friction damper, an electromagnetic damper and a metal plastic deformation damper.

[0039] According to an embodiment of the present invention, the damper 3 is an annular rubber damper or an annular metal rubber damper.

[0040] Thus, energy can be dissipated by rubber creep or wire friction.

[0041] According to an embodiment of the present invention, the material of the annular rubber damper is polyurethane.

[0042] According to an embodiment of the present invention, the buffer bellows 4 is a metal bellows.

[0043] According to an embodiment of the present invention, the buffer bellows 4 is connected to the end cover flange 2 and the cryogenic storage tank 5 by welding.

[0044] For example, Figure 2 As shown, the two ends of the buffer bellows 4 are respectively a first sealing weld joint 41 and a second sealing weld joint 42, which is connected to the end of the end cover flange 2 through the first sealing weld joint 41, and is connected to the end of the cryogenic storage tank 5 through the second sealing weld joint 42. The welding method can be argon arc welding, electron beam welding, etc.

[0045] In the present invention, the number of the refrigerator cold heads may be one or more.

[0046] It can be seen from the above embodiments that the ultra-high-speed magnetic levitation vehicle-mounted refrigeration system described in the present invention has at least the following advantages:

[0047] 1) By designing vibration suppression for the installation of the on-board compressor and the cold head of the refrigerator, the application scope of the low-temperature refrigeration system can be expanded to meet the requirements of ultra-high-speed magnetic levitation vehicles and ensure the long-term and stable operation of the low-temperature refrigeration system on the magnetic levitation vehicle;

[0048] 2) The onboard compressor can achieve all-round vibration suppression in six degrees of freedom in space by optimizing the installation connection points, meeting the vibration reduction requirements of ultra-high-speed maglev trains in all directions;

[0049] 3) There are many types of vehicle-mounted compressor buffer units and vibration damping units, which can be optimized and selected through vibration reduction design or testing, and can be designed as linear or nonlinear buffer vibration reduction;

[0050] 4) The vehicle-mounted refrigerator cold head vibration suppression bellows has the dual functions of vacuum sealing and buffering vibration reduction, which reduces the structural complexity of the refrigerator cold head vibration suppression and improves the reliability of the suppression structure;

[0051] 5) The vehicle-mounted refrigerator cold head vibration suppression structure is suitable for horizontal / vertical / inclined placement, which can meet the requirements of different installation orientations of the refrigerator cold head;

[0052] 6) The cold head vibration suppression structure of the vehicle-mounted refrigerator can be extended to a multi-cold head low-temperature refrigeration system.

[0053] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the 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 devices or elements 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 contours of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0055] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-high-speed magnetic levitation vehicle-mounted refrigeration system, It is characterized in that The system comprises a refrigerator head (1), an end cover flange (2), a damper (3), a buffer bellows (4), a cryogenic storage tank (5), an on-board compressor (6), a first buffer vibration reduction unit (7) and a second buffer vibration reduction unit (8); the refrigerator head (1) is connected to the end cover flange (2); the damper (3) is arranged between the end cover flange (2) and the cryogenic storage tank (5); one end of the buffer bellows (4) is connected to the end cover flange (2) and the other end is connected to the cryogenic storage tank (5); the first buffer vibration reduction unit (7) is arranged at the bottom of the on-board compressor (6); the second buffer vibration reduction unit (8) is arranged on the side of the on-board compressor (6); and the on-board compressor (6) is connected to an ultra-high-speed magnetic suspension vehicle body through the first buffer vibration reduction unit (7) and the second buffer vibration reduction unit (8).

2. The system according to claim 1, It is characterized in that The first buffer vibration reduction unit (7) and the second buffer vibration reduction unit (8) both use multi-stage buffer vibration reduction elements, and the multi-stage buffer vibration reduction elements are used in series or in parallel.

3. The system according to claim 2, It is characterized in that The first buffer vibration reduction unit (7) and the second buffer vibration reduction unit (8) both comprise a buffer unit and a vibration reduction damping unit.

4. The system according to claim 3, It is characterized in that The buffer unit includes at least one of the following: a spiral steel spring, an air spring, a rubber spring, a metal rubber spring, a steel wire spring and an elastic metal.

5. The system according to claim 3, It is characterized in that The vibration reduction damping unit includes at least one of the following: a hydraulic damper, an air damper, a friction damper, an electromagnetic damper, and a metal plastic deformation damper.

6. The system according to any one of claims 1 to 5, It is characterized in that The damper (3) is an annular rubber damper or an annular metal rubber damper.

7. The system according to claim 6, It is characterized in that The material of the annular rubber damper is polyurethane.

8. The system according to any one of claims 1 to 5, It is characterized in that The buffer bellows (4) is a metal bellows.

9. The system according to claim 8, It is characterized in that The buffer bellows (4) is connected to the end cover flange (2) and the low-temperature storage tank (5) by welding.

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