Magnetic suspension ground mold vibration durability test device

Abstract

The invention relates to the technical field of magnetic suspension, and discloses a magnetic suspension ground mold vibration durability test device. The device comprises an installation unit, a vibration tool and a vibration table, the vibration tool is arranged on the vibration table, a ground module is installed on the vibration tool through the installation unit, the vibration table is used for outputting vibration excitation, and the vibration excitation acts on the ground module through the vibration tool. Therefore, the inertia force of the ground module is used for replacing the exciting force in electromagnetic vibration, so that the ground module continuously vibrates to simulate the fatigue vibration of the whole life cycle of the ground module, and the vibration durability test of the ground module is realized.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic suspension, and in particular to a magnetic suspension ground model vibration durability test device. Background Art

[0002] The maglev ground module is installed on both sides of the maglev track beam to provide all the propulsion, suspension and guidance forces required for the train to move and suspend. Since the ground module is subject to alternating forces, it will vibrate during operation. Long-term operation will cause vibration fatigue to the ground module, so it is necessary to evaluate the vibration fatigue durability of the module.

[0003] The existing evaluation method is usually a vibration fatigue durability test, which uses an electromagnetic test bench to statically simulate the actual running conditions of the ground module on the line. This can well simulate the vibration durability of the ground module. However, this test method has the following defects: 1. A lot of preparation work is required before the test, and a lot of finishing work is required after the test. 2. During the test, the ground module must be supplied with alternating current. Long-term supply will cause the module temperature to be too high. If there are no heat dissipation measures, the test will be difficult to carry out for a long time. 3. The test must be carried out in conjunction with superconducting magnets. The cooling of superconducting magnets will consume a lot of liquid helium, which is costly. Summary of the invention

[0004] The invention provides a magnetic suspension ground model vibration durability test device, which can solve the technical problems in the prior art.

[0005] The present invention provides a magnetic levitation ground module vibration durability test device, wherein the device comprises an installation unit, a vibration tooling and a vibration table, the vibration tooling is arranged on the vibration table, the installation unit installs the ground module on the vibration tooling, the vibration table is used to output vibration excitation, and the vibration excitation acts on the ground module through the vibration tooling.

[0006] Preferably, the mounting unit is a mounting bolt, which cooperates with a bolt bushing on the ground module to mount the ground module on the vibration tooling.

[0007] Preferably, the device further comprises a stress detection unit and an acceleration detection unit, and the stress detection unit and the acceleration detection unit are arranged around the bolt bushing.

[0008] Preferably, the stress detection unit is a strain gauge.

[0009] Preferably, the acceleration detection unit is an acceleration sensor.

[0010] Preferably, the vibration table adjusts the output vibration excitation according to the reading of the strain gauge.

[0011] Through the above technical scheme, the vibration table can be used to output vibration excitation, which can be transmitted to the ground module through the vibration tooling. The inertia force of the ground module can be used to replace the exciting force in the electromagnetic vibration to make the ground module vibrate continuously to simulate the fatigue vibration of the ground module throughout its life cycle, thereby realizing the vibration durability test of the ground module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 A schematic diagram of a magnetic suspension ground module vibration durability test device according to an embodiment of the present invention is shown;

[0014] Figure 2 A schematic diagram of a vibration tool according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Figure 1 A schematic diagram of a magnetic suspension ground module vibration durability test device according to an embodiment of the present invention is shown.

[0019] like Figure 1 As shown, an embodiment of the present invention provides a magnetic levitation ground module vibration durability test device, wherein the device includes an installation unit 3, a vibration tooling 4 and a vibration table 5, the vibration tooling 4 is arranged on the vibration table 5, the installation unit 3 installs the ground module 1 on the vibration tooling 4, the vibration table 5 is used to output vibration excitation, and the vibration excitation acts on the ground module 1 through the vibration tooling 4.

[0020] Among them, the ground module is the test piece, which interacts with the superconducting magnet to provide suspension propulsion and guiding force for the train.

[0021] Through the above technical scheme, the vibration table can be used to output vibration excitation, which can be transmitted to the ground module through the vibration tooling. The inertia force of the ground module can be used to replace the exciting force in the electromagnetic vibration to make the ground module vibrate continuously to simulate the fatigue vibration of the ground module throughout its life cycle, thereby realizing the vibration durability test of the ground module.

[0022] According to an embodiment of the present invention, the mounting unit 3 is a mounting bolt, which cooperates with the bolt bushing 2 on the ground module 1 to mount the ground module 1 on the vibration tooling 4 .

[0023] Among them, the vibration tooling is provided with a plurality of bolt holes, and the mounting bolts are finally screwed into the bolt holes through the bolt bushings to fix the ground module. The bolt bushing is a component of the ground module, which can improve the structural strength of the bolt hole position of the ground module, making the ground module safer and more reliable.

[0024] According to an embodiment of the present invention, the device further comprises a stress detection unit and an acceleration detection unit, and the stress detection unit and the acceleration detection unit are arranged around the bolt bushing 2 .

[0025] In this way, the stress value and acceleration value around the bolt bushing can be measured in real time.

[0026] According to an embodiment of the present invention, the stress detection unit is a strain gauge.

[0027] According to an embodiment of the present invention, the acceleration detection unit is an acceleration sensor.

[0028] Those skilled in the art should understand that the above description of the stress detection unit and the acceleration detection unit is merely exemplary and is not intended to limit the present invention.

[0029] According to an embodiment of the present invention, the vibration table 5 adjusts the output vibration excitation according to the reading of the strain gauge.

[0030] For example, the stress value around the bolt bushing obtained during the test is used as a criterion, and the vibration excitation magnitude is continuously increased until the measured stress value is no less than the value measured by the sports car test or electromagnetic excitation test before the test, and then the excitation magnitude is used as the durability test excitation.

[0031] In the present invention, the vibration tooling is made of a material with relatively high rigidity to prevent deformation during the vibration process.

[0032] The working principle of the magnetic levitation ground module vibration durability test device of the present invention is described below with reference to examples.

[0033] Before the vibration table outputs vibration excitation, a sports car test or an electromagnetic excitation test can be performed on the ground module to obtain the acceleration response of the ground module or the alternating stress around the bolt bushing. After obtaining the above data, the pre-acquired data (acceleration response and alternating stress) and Figure 1 The test device shown in the figure is used to conduct a durability vibration test. The test principle is: a vibration excitation of a predetermined magnitude is output through the vibration table, and the stress value around the bolt bushing obtained during the test is used as a criterion. The vibration excitation magnitude is continuously increased until the measured stress value is not less than the value measured by the sports car test or electromagnetic excitation test before the test, and then the excitation magnitude is used as the excitation (excitation of the durability test) to complete the vibration durability test according to the designed vibration number. This test uses the stress around the installation bolt bushing as the criterion, and uses inertial force instead of electromagnetic excitation force to test the vibration durability test of the ground module.

[0034] The specific test steps are as follows:

[0035] 1. Before the test, the alternating stress data and acceleration data around the bolt bushing are obtained through electromagnetic excitation test;

[0036] 2. Fix the ground module to the vibration tooling. The bolt pre-tightening torque between the ground module and the vibration tooling can be installed according to the pre-tightening torque used for the online installation of the ground module. There is sufficient connection stiffness between the vibration tooling and the vibration table.

[0037] 3. Attach strain gauges and acceleration sensors around the bolt holes;

[0038] 4. The vibration table provides a predetermined excitation and continues to increase the excitation until the strain gauge reading is not less than the value measured during electromagnetic excitation. The increased excitation (adjusted excitation) is used as the excitation for subsequent durability tests;

[0039] 5. Carry out vibration test with the adjusted excitation, and complete the designed vibration times to complete the vibration durability test of the ground module.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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. A magnetic levitation ground model vibration durability test device, characterized in that: The device comprises a mounting unit (3), a vibration tool (4) and a vibration table (5); the vibration tool (4) is arranged on the vibration table (5); the mounting unit (3) mounts a ground module (1) on the vibration tool (4); the vibration table (5) is used to output vibration excitation, and the vibration excitation acts on the ground module (1) via the vibration tool (4).

2. The device according to claim 1, characterized in that The mounting unit (3) is a mounting bolt, which cooperates with a bolt bushing (2) on the ground module (1) to mount the ground module (1) on the vibration tooling (4).

3. The device according to claim 2, characterized in that The device also comprises a stress detection unit and an acceleration detection unit, wherein the stress detection unit and the acceleration detection unit are arranged around the bolt bushing (2).

4. The device according to claim 3, characterized in that The stress detection unit is a strain gauge.

5. The device according to claim 4, characterized in that The acceleration detection unit is an acceleration sensor.

6. The device according to claim 5, characterized in that The vibration table (5) adjusts the output vibration excitation according to the reading of the strain gauge.

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