Pivot rail current-carrying ultra-high-speed friction experiment device

Abstract

The invention discloses a pivot rail current-carrying ultra-high-speed friction experiment device which comprises an electromagnetic rail emitter and a friction assembly, the friction assembly comprises a clamping and fixing unit, a rail supporting unit and a friction rail unit, and the friction rail unit comprises an upper friction rail and a lower friction rail. The rail supporting unit supports the upper friction rail and the lower friction rail, and a pill channel allowing pills of the electromagnetic rail dispeller to pass through is formed between the upper friction rail and the lower friction rail. The clamping and fixing unit clamps and fixes the rail supporting unit and the friction rail unit to the transmitting end of the electromagnetic rail transmitter. According to the invention, through cooperation of the electromagnetic emitter and the friction assembly, the shot projectile of the electromagnetic emitter passes through the friction assembly at a high speed to generate frictional contact, and the friction performance of the material can be comprehensively tested under ultrahigh-speed sliding friction, so that the performance research level of the material under a high-speed friction condition is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of material tribology, and in particular relates to a pivot rail current-carrying ultra-high-speed friction experimental device. Background Art

[0002] In modern industry, it is of great significance to understand the physical properties of materials under ultra-high-speed sliding friction conditions. Many key components in high-speed rail, aerospace and military fields need to withstand extremely high friction and temperature during high-speed operation. Therefore, studying the behavior of materials under ultra-high-speed sliding friction conditions is crucial to improving the performance and life of these components.

[0003] At present, the method of studying high-speed friction between different materials is usually based on rotating motors, which drive the test material to make friction contact with the material being tested through high-speed rotation of the motor. However, this test method has the following significant limitations: 1) The test method of rotating motors mainly simulates line contact friction, while many scenarios in actual applications require the study of the behavior of surface contact friction. This line contact test cannot fully reflect the friction performance of the material under actual working conditions. 2) The speed of traditional friction test equipment is relatively low, and it is usually difficult to achieve the ultra-high speed state required by the material in actual applications. It is impossible to accurately simulate the physical phenomena and wear mechanisms under ultra-high-speed sliding friction conditions. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a pivot rail current-carrying ultra-high-speed friction test device capable of simulating the friction state of a material under test at ultra-high speed.

[0005] To achieve the above-mentioned purpose, the pivot rail current-carrying ultra-high-speed friction experimental device of the present invention comprises an electromagnetic rail launcher and a friction assembly, wherein the friction assembly comprises a clamping and fixing unit, a rail support unit and a friction rail unit, wherein the friction rail unit comprises an upper friction rail and a lower friction rail, wherein the rail support unit supports the upper friction rail and the lower friction rail and forms a projectile channel between the upper friction rail and the lower friction rail for the projectile of the electromagnetic rail launcher to pass through; the clamping and fixing unit clamps and fixes the rail support unit and the friction rail unit to the launching end of the electromagnetic rail launcher, so that the projectile launched by the electromagnetic rail launcher can pass along the projectile channel and generate friction contact with the friction rail unit.

[0006] Furthermore, the track support unit includes a left support plate and a right support plate, the left support plate and the right support plate are relatively spaced apart, the left support plate and the right support plate are provided with bosses, and the upper and lower friction rails are supported and positioned by the upper and lower edges of the bosses.

[0007] Furthermore, the clamping and fixing unit includes a rail pressure plate, an insulating pressure plate and a fixing shell, the rail pressure plate clamps and positions the rail support unit and the friction rail unit in the positioning groove of the rail pressure plate, the insulating pressure plate is arranged between the fixing shell and the rail pressure plate, and the fixing shell clamps and fixes the rail pressure plate, the rail support unit and the friction rail unit.

[0008] Furthermore, the rail pressure plate includes a left pressure plate and a right pressure plate, both of which have grooves, and the left pressure plate and the right pressure plate are respectively connected along the outer sides of the left support plate and the right support plate, so that the grooves of the left pressure plate and the right pressure plate are combined to form the positioning groove.

[0009] Furthermore, the fixed shell includes a left outer shell and a right outer shell, and the left outer shell and the right outer shell are respectively connected along the outer sides of the left pressure plate and the right pressure plate and fixedly connected by bolts to clamp and fasten the rail pressure plate, the rail support unit and the friction rail unit.

[0010] Further, the insulating platen includes a left insulating plate and a right insulating plate, the left insulating plate is arranged between the left outer shell and the left platen, and the right insulating plate is arranged between the right outer shell and the right platen.

[0011] Furthermore, the fixing shell, the rail pressing plate and the rail supporting unit are made of metal rigid materials.

[0012] Furthermore, the insulating pressing plate is made of insulating flexible material.

[0013] Furthermore, an insulating transition unit is provided at the joint between the electromagnetic rail launcher and the friction assembly, and the electromagnetic rail of the electromagnetic rail launcher and the friction rail unit of the friction assembly are positioned and connected through the insulating transition unit.

[0014] Furthermore, the insulating transition unit includes an insulating pad and an insulating transition track, the insulating pad covers the electromagnetic track at the launching end of the electromagnetic track launcher, the insulating transition track is arranged between the electromagnetic track of the electromagnetic track launcher and the friction rail unit of the friction assembly, and the projectile launched by the electromagnetic track launcher is guided into the projectile channel of the friction rail unit through the insulating transition track.

[0015] The present invention cooperates the electromagnetic launcher and the friction component to enable the projectile launched by the electromagnetic launcher to pass through the friction component at high speed to generate friction contact, which can comprehensively test the friction performance of the material under ultra-high-speed sliding friction, thereby improving the performance research level of the material under high-speed friction conditions.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of an ultra-high-speed friction experimental device according to an embodiment of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of a projectile channel of a friction assembly according to an embodiment of the present invention;

[0020] Figure 3 is a cross-sectional schematic diagram of a friction assembly according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the exploded structure of a friction assembly according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of assembling a friction assembly and an electromagnetic rail launcher according to an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the connection between the insulating transition track and the electromagnetic track of the electromagnetic track transmitter and the friction rail unit of the friction assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The terms "top", "bottom", "above", "lower", and "on", "left-right", and "upper-lower" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, the defined "first" and "second" features may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-6 As shown, the pivot rail current-carrying ultra-high-speed friction experimental device of the present invention comprises an electromagnetic rail launcher 1 and a friction assembly 2, and the electromagnetic rail launcher 1 and the friction assembly 2 are fixed on a test bench 3. The friction assembly 2 comprises a clamping and fixing unit, a rail support unit and a friction rail unit, and the friction rail unit comprises an upper friction rail 21 and a lower friction rail 22, and the rail support unit supports the upper friction rail 21 and the lower friction rail 22 and forms a projectile channel 23 between the upper friction rail 21 and the lower friction rail 22 for the projectile of the electromagnetic rail launcher 1 to pass through; the clamping and fixing unit clamps and fixes the rail support unit and the friction rail unit to the launch end of the electromagnetic rail launcher 1, so that the projectile launched by the electromagnetic rail launcher 1 can pass along the projectile channel 23 and generate friction contact with the friction rail unit. By fixing the electromagnetic rail launcher 1 and the friction assembly 2 on the test bench 3 with screws or bolts, the relative position between the electromagnetic rail launcher 1 and the friction assembly 2 can be ensured to be fixed, and the position between the electromagnetic rail launcher and the friction assembly 2 can be prevented from being set, which causes the projectile fired by the electromagnetic rail launcher 1 to be unable to accurately enter the projectile channel 23 formed between the upper friction rail 21 and the lower friction rail 22. After passing through the projectile channel 23, the projectile fired by the electromagnetic rail launcher 1 will have sliding surface contact with the upper friction rail 21 and the lower friction rail 22. After the test is completed, the upper friction rail 21 and the lower friction rail 22 are removed from the friction assembly 2, so that the material friction characteristics of the upper friction rail 21 and the lower friction rail 22 can be studied and analyzed. Replacing the materials of the upper friction rail 21 and the lower friction rail 22 can realize the friction performance test of friction rails of different materials during high-speed sliding contact.

[0030] The rail support unit includes a left support plate 41 and a right support plate 42, which are arranged at intervals relative to each other and arranged along the arrangement direction of the upper friction rail 21 and the lower friction rail 22. The left support plate 41 and the right support plate 42 have bosses 411 and 412, and the upper and lower edges of the bosses 411 and 412 support and position the upper friction rail 21 and the lower friction rail 22. The closed space between the left support plate 41, the right support plate 42, the upper friction rail 21 and the lower friction rail 22 forms a projectile channel 23. The left support plate 41 and the right support plate 42 can position the upper and lower friction rails 21 and 22 by setting the bosses 411 and 412. Since no screws or bolts are used to connect the fixings, the upper and lower friction rails 21 and 22 can be replaced more conveniently, and the distance between the upper and lower friction rails 21 and 22 can be accurately positioned to ensure that the projectiles launched by the electromagnetic launcher can generate sliding friction contact when passing between the upper and lower friction rails 21 and 22. In addition, by replacing the left support plate and the right support plate with different boss size structures, the distance between the upper and lower friction rails 21 and 22 can be fine-tuned by adjusting the vertical height of the bosses, and the friction performance of the upper and lower friction rails in different application scenarios can be studied. The left support plate 41 and the right support plate 42 can also be made of metal rigid material, and the distance between the left support plate 41 and the right support plate 42 can be adjusted by adjusting the radial height of the boss, so that the projectile will have sliding surface contact with the boss surface of the left support plate 41 and the right support plate 42 when passing through, and then the material friction performance of the left support plate 41 and the right support plate 42 is studied and analyzed according to the friction contact characteristics of the boss on the left support plate 41 and the right support plate 42. The upper friction rail 21 and the lower friction rail 22, the left support plate 41 and the right support plate 42 used in the same test can be made of different materials, so that the friction performance of two different materials can be tested in one friction experiment, which improves the test efficiency.

[0031] like Figure 3 and 4As shown, the clamping and fixing unit includes a track pressing plate, an insulating pressing plate and a fixing shell. The track pressing plate clamps and positions the track support unit and the friction rail unit in the positioning groove of the track pressing plate. The insulating pressing plate is arranged between the fixing shell and the track pressing plate. The fixing 7 clamps and fixes the track pressing plate, the track support unit and the friction rail unit. The track pressing plate includes a left pressing plate 51 and a right pressing plate 52. Both the left pressing plate 51 and the right pressing plate 52 have grooves. The left pressing plate 51 and the right pressing plate 52 are respectively connected along the outer sides of the left support plate 41 and the right support plate, so that the grooves of the left pressing plate and the right pressing plate are combined to form the positioning groove 51. Such a configuration can, on the one hand, clamp the track support unit and the friction rail unit to limit their positions in all directions, and on the other hand, facilitate the disassembly, assembly and replacement of the track support unit and the friction rail unit. The fixed shell includes a left shell 71 and a right shell 72, and the left shell 71 and the right shell 72 are respectively connected along the outer sides of the left pressure plate 51 and the right pressure plate 52 and fixedly connected by bolts, so as to clamp and fasten the track pressure plate 5, the track support unit and the friction rail unit. In addition, a fixed end plate 73 can be provided at the outlet end of the fixed shell close to the projectile channel 23 of the friction assembly 2, so that the track support unit and the friction rail unit can be limited in all directions. The insulating pressure plate 6 includes a left insulating plate 61 and a right insulating plate 62, and the left insulating plate 61 is arranged between the left shell 71 and the left pressure plate 51, and the right insulating plate 62 is arranged between the right shell 72 and the right pressure plate 52. Since the fixed shell, track pressure plate, track support unit, upper and lower friction rails are all made of metal rigid materials, and the electromagnetic track launcher needs to apply high-voltage pulse power to its track during launch, in order to prevent the high-voltage electricity of the electromagnetic track launcher from being transmitted to the rear friction component fixed shell, an insulating pressure plate is added between the fixed shell and the track pressure plate for insulation protection to prevent the risk of electric shock. The left insulating plate and the right insulating plate can be made of epoxy sheets, etc.

[0032] like Figure 4 and 6As shown, an insulating transition unit is provided at the joint between the electromagnetic rail launcher 1 and the friction assembly 2, and the electromagnetic rail 11 of the electromagnetic rail launcher and the friction rail unit of the friction assembly 2 are positioned and connected by the insulating transition unit. Such a setting can prevent the friction rail unit of the friction assembly 2 from directly contacting the electromagnetic rail 11 of the electromagnetic rail launcher 1, and prevent high voltage electricity from being conducted to the friction assembly 2. Specifically, the insulating transition unit includes an insulating pad 81 and an insulating transition track 82, the insulating pad 81 covers the electromagnetic rail 11 at the launch end of the electromagnetic rail launcher 1, and the insulating transition track 82 is arranged between the electromagnetic rail 11 of the electromagnetic rail launcher 1 and the friction rail unit of the friction assembly 2, and is supported by the bosses on the left support plate 41 and the right support plate 42, and the projectiles launched by the electromagnetic rail launcher 1 are guided by the insulating transition track into the projectile channel 23 of the friction rail unit. The insulating pad 81 covers the electromagnetic track 11 of the electromagnetic track launcher 1 to prevent the electromagnetic track from being exposed and causing electric shock. On the other hand, the insulating pad and the friction assembly can be clamped together through a fixed shell to achieve a positioning connection between the electromagnetic track launcher and the friction assembly.

[0033] like Figure 4 As shown, an arc extinguishing device 9 of the transmitter is also provided at the electromagnetic rail port of the electromagnetic rail launcher 1. The arc extinguishing device 9 is fixed on both sides of the electromagnetic rail launch port to prevent high-energy arc from ablating and damaging the electromagnetic rail contact surface. The spacing between the arc extinguishing devices on both sides can accommodate the upper friction rail, the lower friction rail, the left support plate, the right support plate, the left pressure plate and the right pressure plate. The inner sides of the left insulating plate and the right insulating plate are provided with a receiving groove matching the shape of the arc extinguishing device 9. When the left insulating plate and the right insulating plate are pressed and fixed on the left pressure plate and the right pressure plate, the arc extinguishing devices 9 on both sides can be covered and fixed together, so that the electromagnetic rail launcher 1 and the friction assembly 2 are connected as a whole under the clamping and positioning of the clamping and fixing unit, further ensuring that the projectiles launched by the electromagnetic rail launcher can accurately enter the projectile channel 23 of the friction assembly 2.

[0034] In summary, the present invention cooperates with the electromagnetic launcher and the friction component to enable the projectile launched by the electromagnetic launcher to pass through the friction component at high speed to generate friction contact, which can comprehensively test the friction performance of the material under ultra-high-speed sliding friction, thereby improving the performance research level of the material under high-speed friction conditions.

[0035] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0036] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A pivot rail current-carrying ultra-high-speed friction experimental device, characterized in that: It includes an electromagnetic rail launcher and a friction assembly, the friction assembly includes a clamping and fixing unit, a rail support unit and a friction rail unit, the friction rail unit includes an upper friction rail and a lower friction rail, the rail support unit supports the upper friction rail and the lower friction rail and forms a projectile channel between the upper friction rail and the lower friction rail for the projectile of the electromagnetic rail launcher to pass through; the clamping and fixing unit clamps and fixes the rail support unit and the friction rail unit to the launching end of the electromagnetic rail launcher, so that the projectile launched by the electromagnetic rail launcher can pass along the projectile channel and generate friction contact with the friction rail unit.

2. The pivot rail current-carrying ultra-high-speed friction experimental device according to claim 1, characterized in that: The track support unit includes a left support plate and a right support plate, the left support plate and the right support plate are arranged relatively spaced apart, the left support plate and the right support plate are provided with bosses, and the upper and lower edges of the bosses are used to support and position the upper friction rail and the lower friction rail.

3. The pivot rail current-carrying ultra-high-speed friction experimental device as claimed in claim 2, characterized in that: The clamping and fixing unit includes a track pressing plate, an insulating pressing plate and a fixing shell. The track pressing plate clamps and positions the track supporting unit and the friction rail unit in the positioning groove of the track pressing plate. The insulating pressing plate is arranged between the fixing shell and the track pressing plate. The fixing shell clamps and fixes the track pressing plate, the track supporting unit and the friction rail unit.

4. The pivot rail current-carrying ultra-high-speed friction experimental device as claimed in claim 3, characterized in that: The rail pressure plate includes a left pressure plate and a right pressure plate, both of which have grooves, and the left pressure plate and the right pressure plate are respectively connected along the outer sides of the left support plate and the right support plate, so that the grooves of the left pressure plate and the right pressure plate are combined to form the positioning groove.

5. The pivot rail current-carrying ultra-high-speed friction experimental device as claimed in claim 4, characterized in that: The fixed shell includes a left outer shell and a right outer shell, which are respectively butted along the outer sides of the left pressure plate and the right pressure plate and fixedly connected by bolts to clamp and fasten the rail pressure plate, the rail support unit and the friction rail unit.

6. The pivot rail current-carrying ultra-high-speed friction experimental device as claimed in claim 5, characterized in that: The insulating press plate includes a left insulating plate and a right insulating plate, wherein the left insulating plate is disposed between the left housing and the left press plate, and the right insulating plate is disposed between the right housing and the right press plate.

7. The pivot rail current-carrying ultra-high-speed friction experimental device as claimed in claim 5, characterized in that: The fixing shell, the rail pressing plate and the rail supporting unit are made of metal rigid materials.

8. The pivot rail current-carrying ultra-high-speed friction experimental device according to claim 6, characterized in that: The insulating pressing plate is made of insulating flexible material.

9. The pivot rail current-carrying ultra-high-speed friction experimental device according to claim 5, characterized in that: An insulating transition unit is provided at the joint between the electromagnetic rail launcher and the friction assembly, and the electromagnetic rail of the electromagnetic rail launcher and the friction rail unit of the friction assembly are positioned and connected through the insulating transition unit.

10. The pivot rail current-carrying ultra-high-speed friction experimental device according to claim 9, characterized in that: The insulating transition unit includes an insulating pad and an insulating transition track. The insulating pad covers the electromagnetic track at the launching end of the electromagnetic track launcher. The insulating transition track is arranged between the electromagnetic track of the electromagnetic track launcher and the friction rail unit of the friction assembly. The projectile launched by the electromagnetic track launcher is guided into the projectile channel of the friction rail unit through the insulating transition track.

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