Controllable moving device for excitation coil of arc heater

Abstract

The utility model discloses a controllable moving device for a magnet exciting coil of an electric arc heater. The controllable moving device comprises a fixed side plate, an insulating sleeve, a bearing platform, a rigid coupling, a stepping motor, a controller, a screw rod, the magnet exciting coil, an L-shaped adapter plate, a ball screw fixer, a ball screw, double linear guide rails and an integrated base, the magnet exciting coil is wound on the insulating sleeve, and the insulating sleeve is clamped on the fixed side plate; the two fixed side plates are connected through a screw rod; the fixed side plate is mounted on the bearing platform through the L-shaped adapter plate; the double linear guide rails are fixed on the integrated base; the bearing platform is clamped on the double linear guide rails; the ball screw penetrates through the bearing platform and is fixed on the integrated base through the ball screw fixer; the stepping motor and the controller are fixed on the side wall of the integrated base; and the stepping motor is connected with the ball screw through a rigid coupling. The device disclosed by the utility model has the advantages of being high in integral structure integration degree, simple to operate, accurate to control and convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of arc heater operation control, in particular to a controllable moving device for an excitation coil of an arc heater. Background Art

[0002] The arc heater heats the gas medium through the hot arc generated by the breakdown discharge between the electrodes. The generated high-temperature airflow is accelerated through the nozzle to obtain an aerodynamic thermal environment that can simulate the re-entry of the aircraft. It is the preferred ground test equipment for the screening and assessment of thermal protection materials for high-speed aircraft. During high-power operation, the arc heater has an extremely high heat flux density. The arc root will continue to cause severe ablation of specific locations on the electrode surface, which can easily lead to rapid failure of the electrode. Using magnetic fields and rotating airflow to make the arc root move rapidly along the electrode surface is a common method to effectively reduce electrode ablation. The magnetic field along the axis of the electrode is mainly generated by the excitation coil wrapped around the electrode shell. The arc root moves rapidly around the electrode radially under the action of the Ampere force, preventing the arc root from staying on the electrode for too long and quickly burning through the electrode.

[0003] For an arc heater of a given structure, the ablation area of ​​the arc root on the electrode surface is basically fixed during operation under certain operating parameters (current, gas medium flow). When the operation time is short, the ablation effect of the arc root will not cause obvious damage to the electrode structure. However, when the operation time is long (on the order of thousands of seconds) under high current conditions, the ablation effect of the arc root on the electrode is very obvious. Continuous ablation at a specific position will cause obvious ablation pits to appear at that location. The electrode may burn through and leak before the predetermined test time is reached, while the electrode in the area not ablated by the arc root basically maintains its original morphology.

[0004] Adjusting the arc root's ablation position by adjusting the excitation coil's position to change the arc root's force is a viable approach, achieving more uniform ablation on the electrode surface and thus extending electrode life. However, the number of turns and mounting position of the commonly used arc heater excitation coils are fixed. Furthermore, to achieve a higher magnetic field strength, the excitation coils are typically incorporated into the arc heater system's main circuit. Therefore, designing a controllable movement device for the arc heater's excitation coils to achieve controllable adjustment of the arc root during heater operation and thereby extend electrode life is highly desirable and crucial for efficiently conducting high-power aerodynamic thermal testing. Utility Model Content

[0005] The technology of the utility model solves the problem: it overcomes the shortcomings of the existing technology and provides a controllable movement device for the excitation coil of an arc heater, which solves the problem that the excitation coil cannot be controlled to move during the operation of the arc heater. The device can realize the controllable movement operation of the excitation coil during the operation of the arc heater, and has the advantages of high overall structural integration, simple operation, accurate control, and easy installation and disassembly.

[0006] In order to solve the above technical problems, the utility model discloses a controllable movable device for an electric arc heater excitation coil, comprising: two fixed side plates, an insulating sleeve, a bearing platform, a rigid coupling, a stepping motor, a controller, a screw, an excitation coil, two L-shaped adapter plates, a ball screw holder, a ball screw, a double linear guide rail and an integrated base; the two fixed side plates are respectively: a first fixed side plate and a second fixed side plate; the two L-shaped adapter plates are respectively: a first L-shaped adapter plate and a second L-shaped adapter plate;

[0007] The excitation coil is wound around the insulating sleeve, and the two ends of the insulating sleeve are respectively clamped in the stepped slots on the first fixed side plate and the second fixed side plate; the first fixed side plate and the second fixed side plate are connected by screws and locked by nuts; the first fixed side plate and the second fixed side plate are respectively mounted on the bearing platform via the first L-shaped adapter plate and the second L-shaped adapter plate;

[0008] The double linear guide rails are fixed on the integrated base; the bearing platform is clamped on the double linear guide rails through the slide rail slots at the bottom; the ball screw is set through the bearing platform, and both ends of the ball screw are fixed to the integrated base through ball screw holders;

[0009] The stepper motor and the controller are fixed on the side wall of the integrated base through bolts; the controller and the stepper motor are connected through wires; and the stepper motor and the ball screw are connected through a rigid coupling.

[0010] In the above-mentioned controllable moving device for the excitation coil of the electric arc heater, 1.05≤the length of the insulating sleeve along the axial direction / the length of the excitation coil along the axial direction≤1.2.

[0011] In the above-mentioned arc heater excitation coil controllable moving device,

[0012] The fixed side plate is provided with N fixing holes for connecting screws, and the N fixing holes are evenly distributed on the fixed side plate, 4≤N≤8;

[0013] The fixed side plate is provided with a slotted hole for connecting the L-shaped adapter plate, and the length adjustment range of the slotted hole is 50mm to 200mm.

[0014] In the above-mentioned controllable movable device for the excitation coil of the arc heater, the L-shaped adapter plate is fixed in the threaded holes on the bearing platform by bolts. The threaded holes on the bearing platform are evenly distributed, and the minimum spacing of the threaded holes on the bearing platform is equal to the minimum length of the excitation coil along the axial direction.

[0015] In the above-mentioned controllable moving device for the excitation coil of the arc heater, the maximum length of the excitation coil along the axial direction*1.02≤the length of the carrying platform≤the maximum length of the excitation coil along the axial direction*1.1.

[0016] In the above-mentioned controllable moving device for the excitation coil of the arc heater, 0.05 mm ≤ (the aperture of the ball screw holder - the diameter of the non-threaded section of the ball screw) ≤ 0.2 mm.

[0017] In the above-mentioned controllable moving device for the excitation coil of the arc heater, 0.7≤the outer side distance of the double linear guide rails / the width of the bearing platform≤1.0.

[0018] In the above-mentioned controllable moving device for the excitation coil of the electric arc heater, 1.1≤width of the integrated base / width of the carrying platform≤1.3.

[0019] In the above-mentioned controllable moving device for the excitation coil of the arc heater, the thickness of the integrated base is 5 mm ≤ 10 mm.

[0020] In the above-mentioned controllable movable device of the arc heater excitation coil, the height of the side of the integrated base*1.1≤the maximum external dimension of the stepper motor≤the side height of the integrated base*1.5; 1mm / s≤the moving speed of the stepper motor≤10mm / s; 0.5mm≤the control accuracy of the stepper motor≤2mm.

[0021] The utility model has the following advantages:

[0022] (1) The utility model discloses a controllable moving device for the excitation coil of an arc heater, which solves the problem that the existing excitation coil structure cannot achieve controllable moving operation during the operation of the arc heater.

[0023] (2) The utility model discloses a controllable movable device for an arc heater excitation coil, which adopts a highly integrated design and all components are integrated into an integrated base, with a compact size and high space utilization.

[0024] (3) The utility model discloses a controllable moving device for the excitation coil of an arc heater, which has strong applicability and can be quickly installed for different types of heaters and their bearing structures as well as the structures of the excitation coils, thereby greatly improving the test efficiency.

[0025] (4) The utility model discloses a controllable moving device for the excitation coil of an arc heater, which has various and flexible control modes. The movement of the excitation coil can be controlled remotely by humans during the test, and can also be automatically controlled according to a control program edited in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a controllable moving device for an arc heater excitation coil according to an embodiment of the present utility model;

[0027] Figure 2 It is a structural schematic diagram of a fixed side plate in an embodiment of the utility model. DETAILED DESCRIPTION

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

[0029] Reference Figure 1 In this embodiment, the controllable movable device of the arc heater excitation coil includes: two fixed side plates, an insulating sleeve 2, a carrying platform 3, a rigid coupling 4, a stepping motor 5, a controller 6, a screw 7, an excitation coil 8, two L-shaped adapter plates, a ball screw holder 10, a ball screw 11, a double linear guide 12 and an integrated base 13; the two fixed side plates are respectively: a first fixed side plate 101 and a second fixed side plate 102; the two L-shaped adapter plates are respectively: a first L-shaped adapter plate 901 and a second L-shaped adapter plate 902. Among them, the excitation coil 8 is wound on the insulating sleeve 2, and the two ends of the insulating sleeve 2 are respectively clamped in the stepped slots on the first fixed side plate 101 and the second fixed side plate 102; the first fixed side plate 101 and the second fixed side plate 102 are connected by a screw 7 and locked by a nut; the first fixed side plate 101 and the second fixed side plate 102 are respectively installed on the bearing platform 3 through the first L-shaped adapter plate 901 and the second L-shaped adapter plate 902; the double linear guide rails 12 are fixed on the integrated base 13; the bearing platform 3 is clamped on the double linear guide rails 12 through the slide rail slot at the bottom; the ball screw 11 is set through the bearing platform 3, and the two ends of the ball screw 11 are respectively fixed to the integrated base 13 through the ball screw holder 10; the stepper motor 5 and the controller 6 are fixed to the side wall of the integrated base 13 by bolts; the controller 6 and the stepper motor 5 are connected by a wire; the stepper motor 5 and the ball screw 11 are connected by a rigid coupling 4.

[0030] In this embodiment, 1.05≤length of the insulating sleeve along the axial direction / length of the excitation coil along the axial direction≤1.2.

[0031] In this embodiment, if Figure 2 As shown, the fixed side plate is provided with N fixing holes for connecting screws 7. The N fixing holes are evenly distributed on the fixed side plate, and 4≤N≤8. The fixed side plate is also provided with a slotted hole for connecting the L-shaped adapter plate. The length of the slotted hole can be adjusted within a range of 50mm to 200mm.

[0032] In this embodiment, the L-shaped adapter plate is fixed to the threaded holes on the carrying platform 3 by bolts. The threaded holes on the carrying platform 3 are evenly distributed, and the minimum spacing of the threaded holes on the carrying platform is equal to the minimum length of the excitation coil along the axial direction.

[0033] In this embodiment, the maximum length of the excitation coil along the axial direction*1.02≤the length of the carrying platform≤the maximum length of the excitation coil along the axial direction*1.1.

[0034] In this embodiment, 0.05 mm≤(hole diameter of the ball screw holder-diameter of the non-threaded section of the ball screw)≤0.2 mm.

[0035] In this embodiment, 0.7≤the outer side distance of the double linear guide rails / the width of the bearing platform≤1.0.

[0036] In this embodiment, 1.1≤width of the integrated base / width of the carrying platform≤1.3.

[0037] In this embodiment, 5 mm ≤ the thickness of the integrated base ≤ 10 mm.

[0038] In this embodiment, the height of the side of the integrated base*1.1≤the maximum outer dimension of the stepper motor≤the side height of the integrated base*1.5; 1mm / s≤the moving speed of the stepper motor≤10mm / s; 0.5mm≤the control accuracy of the stepper motor≤2mm.

[0039] In this embodiment, the surface of the excitation coil 8 needs to be insulated.

[0040] In this embodiment, the insulating sleeve 2 is preferably made of insulating polymer materials or polymer-based composite materials, such as polytetrafluoroethylene, polyimide, glass fiber reinforced plastics, or reinforced nylon.

[0041] In this embodiment, the L-shaped adapter plate is made of metal, preferably 304 stainless steel or carbon steel.

[0042] In this embodiment, the integrated base 13 is made of metal, preferably 304 stainless steel or carbon steel.

[0043] In this embodiment, the material of the carrying platform 3 is a light metal, preferably aluminum alloy or magnesium alloy.

[0044] In this embodiment, the controller 6 has the function of real-time control and automatic control of the stepper motor 5 according to the edited program.

[0045] In this embodiment, the integrated base 13 can be fixed to the supporting structure of the arc heater by means of bolts or calipers.

[0046] The above is only the best specific implementation method of the present invention, but the scope of protection of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

[0047] The contents not described in detail in the specification of this utility model belong to the common knowledge of professionals in this field.

Claims

1. A controllable moving device for an arc heater excitation coil, characterized in that: include: Two fixed side plates, an insulating sleeve (2), a bearing platform (3), a rigid coupling (4), a stepping motor (5), a controller (6), a screw (7), an excitation coil (8), two L-shaped adapter plates, a ball screw holder (10), a ball screw (11), a double linear guide rail (12) and an integrated base (13); the two fixed side plates are respectively: a first fixed side plate (101) and a second fixed side plate (102); the two L-shaped adapter plates are respectively: a first L-shaped adapter plate (901) and a second L-shaped adapter plate (902); The excitation coil (8) is wound on the insulating sleeve (2), and the two ends of the insulating sleeve (2) are respectively clamped in the stepped slots on the first fixed side plate (101) and the second fixed side plate (102); the first fixed side plate (101) and the second fixed side plate (102) are connected by a screw (7) and locked by a nut; the first fixed side plate (101) and the second fixed side plate (102) are respectively installed on the bearing platform (3) via a first L-shaped adapter plate (901) and a second L-shaped adapter plate (902); The double linear guide rails (12) are fixed on the integrated base (13); the bearing platform (3) is clamped on the double linear guide rails (12) through the slide rail clamping groove at the bottom; the ball screw (11) is arranged through the bearing platform (3), and both ends of the ball screw (11) are respectively fixed on the integrated base (13) through the ball screw fixer (10); The stepper motor (5) and the controller (6) are fixed to the side wall of the integrated base (13) by bolts; the controller (6) and the stepper motor (5) are connected by wires; and the stepper motor (5) and the ball screw (11) are connected by a rigid coupling (4).

2. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: 1.05≤the length of the insulating sleeve along the axial direction / the length of the excitation coil along the axial direction≤1.

2.

3. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: The fixed side plate is provided with N fixing holes for connecting screw rods (7), and the N fixing holes are evenly distributed on the fixed side plate, 4≤N≤8; The fixed side plate is provided with a slotted hole for connecting the L-shaped adapter plate, and the length adjustment range of the slotted hole is 50mm to 200mm.

4. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: The L-shaped adapter plate is fixed in the threaded holes on the bearing platform (3) by bolts. The threaded holes on the bearing platform (3) are evenly distributed, and the minimum spacing of the threaded holes on the bearing platform is equal to the minimum length of the excitation coil along the axial direction.

5. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: The maximum length of the excitation coil along the axial direction*1.02≤the length of the bearing platform≤the maximum length of the excitation coil along the axial direction*1.

1.

6. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: 0.05mm≤(hole diameter of ball screw holder - diameter of non-threaded section of ball screw)≤0.2mm.

7. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: 0.7≤Double linear guide rail outer spacing / width of the load-bearing platform≤1.

0.

8. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: 1.1≤Width of integrated base / Width of carrying platform≤1.

3.

9. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: 5mm≤Thickness of the integrated base≤10mm.

10. The controllable moving device for the excitation coil of an arc heater according to claim 1, characterized in that: The height of the side of the integrated base*1.1≤the maximum dimension of the stepper motor≤the height of the side of the integrated base*1.5; 1mm / s≤the moving speed of the stepper motor≤10mm / s; 0.5mm≤the control accuracy of the stepper motor≤2mm.

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