An arc-shaped rapid winding device for temperature measuring thermocouples used in arc wind tunnel experiments

Abstract

The application discloses an arc-shaped rapid winding device for temperature measuring thermocouples used in arc wind tunnel experiments, which comprises a thermocouple wire shaft fixator and an arc-shaped winding handle. A pair of thermocouple wire shafts are placed on the thermocouple wire shaft fixator, and the thermocouples on the two wire shafts are combined and led out. The arc-shaped winding handle comprises arc-shaped winding end blocks, movable horizontal support rods, movable vertical support rods and a disc fixing seat. One end of each of the two movable horizontal support rods is movably connected with the disc fixing seat, and the other end of each of the two movable horizontal support rods is fixedly connected with two arc-shaped winding end blocks. The two arc-shaped winding end blocks are vertically placed and arc-shaped oppositely, and the combined thermocouples are wound on the outer surfaces of the two arc-shaped winding end blocks. The two ends of the movable vertical support rods are movably connected with the two arc-shaped winding end blocks. Through the application of the device, the problems of knotting and length difference of the finished coils after winding can be solved, and the finished coils are easy to take out.

Description

Technical Field

[0001] This invention relates to an arc-shaped rapid winding device for a temperature measuring thermocouple used in an electric arc wind tunnel experiment, belonging to the field of wind tunnel testing technology. Background Technology

[0002] The electric arc wind tunnel is an effective and indispensable core experimental device for designing heat-resistant structural materials for hypersonic vehicles. Within a certain range, the electric arc wind tunnel can simulate the aerodynamic heating environment of various hypersonic vehicles, and conduct aerodynamic thermal ground simulation tests on various vehicle experimental models.

[0003] In arc wind tunnel testing, temperature sensors are placed on the model to assess the thermal resistance of experimental materials and obtain effective temperature and heat flow data. The most common temperature sensors are small-diameter thermocouples, typically less than 0.3 mm in diameter. Since each type of thermocouple is double-wired, the required thermocouple length varies in actual experiments. Therefore, winding the thermocouples into a finished coil is a frequent practical operation during the experimental temperature measurement preparation stage. Thus, simplifying and maximizing the preparation work of making a finished coil of a certain length from the tiny-diameter thermocouple double wires is of great significance in arc wind tunnel experiments.

[0004] In existing winding methods, the thermocouples on the two spools must first be released and brought together before the desired length of finished coil is wound. During the release of the thermocouples, the spools, lacking damping, are prone to detaching, and the small diameter of the thermocouples makes them even more susceptible to tangling. This not only increases the workload for testing personnel but also easily leads to the waste of expensive thermocouples, impacting both the experimental schedule and costs. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose an arc-shaped rapid winding device for thermocouples used in electric arc wind tunnel experiments. By setting a thermocouple bobbin fixer and an arc-shaped winding handle, the problems of knotting and inconsistent lengths of the finished coils are solved.

[0006] The technical solution of this invention is:

[0007] An arc-shaped rapid winding device for a thermocouple used in an electric arc wind tunnel experiment includes a thermocouple bobbin holder and an arc-shaped winding handle.

[0008] A pair of thermocouple spools are placed on the thermocouple spool holder, and the thermocouples on the two spools are led out in parallel.

[0009] The arc-shaped winding handle includes an arc-shaped winding end block, a movable horizontal support rod, a movable vertical support rod, and a disc fixing seat; one end of each of the two movable horizontal support rods is movably connected to the disc fixing seat, and the other end is fixedly connected to the two arc-shaped winding end blocks; the two arc-shaped winding end blocks are placed vertically and face each other in an arc shape, and the thermocouples after being wired together are wound around the outer surface of the two arc-shaped winding end blocks; both ends of the movable vertical support rod are movably connected to the two arc-shaped winding end blocks.

[0010] Preferably, the thermocouple spool retainer includes a thermocouple spool fixing seat, a reduction shaft, a reduction bearing, a thermocouple paralleling bayonet, and a thermocouple tensioning bayonet;

[0011] The thermocouple spool fixing seat includes a bottom surface and a vertical surface. Two reduction shafts are installed on the bottom surface, and each reduction shaft is equipped with a reduction bearing. A pair of thermocouple spools are respectively fitted onto the two reduction shafts. The vertical surface is provided with a thermocouple paralleling clamp and a thermocouple tensioning clamp on the upper surface of the vertical surface.

[0012] The thermocouples on a pair of thermocouple spools pass sequentially through the thermocouple paralleling bayonet and the thermocouple tensioning bayonet before being led out to the arc-shaped winding handle.

[0013] Preferably, belt grooves are provided at the bottom ends of the two thermocouple spools, and a drive belt is installed in the grooves to make the two spools rotate synchronously.

[0014] Preferably, the materials for the thermocouple parallel connection and the thermocouple tensioning connection are polytetrafluoroethylene (PTFE).

[0015] Preferably, each thermocouple spool has an arc-shaped tray on the outer side of its bottom end, and baffles are provided at the opposite positions of the two spools. Both the baffles and the trays are fixed on the bottom surface of the thermocouple spool fixing seat, and the distances of the trays and baffles from the bottom end of the spools are less than the diameter of the thermocouple.

[0016] Preferably, the top of the movable vertical support rod is connected to the upper arc-shaped winding end block via a magnetic block; after the movable vertical support rod is manually pushed, the movable vertical support rod separates from the magnetic block and the upper arc-shaped winding end block.

[0017] Preferably, the thermocouple wire shaft retainer further includes a strut fixing block, and the bottom end of the movable vertical strut is connected to the lower arc-shaped winding end block through the strut fixing block; the strut fixing block is a semi-enclosed structure with an open top and an empty side wall opposite to the disc fixing seat, and the movable vertical strut and the strut fixing block are connected by a pin, and the movable vertical strut can move around the pin as an axis.

[0018] Preferably, the upper end face of the movable vertical strut is an inclined plane with an inclination angle not exceeding 30 degrees.

[0019] Preferably, the arc-shaped winding end block has a toothed opening and the outer surface is corrugated.

[0020] Preferably, it also includes an electronic winding counter, with a rotating shaft fixing hole opened at the center of the disk fixing base, and the electronic winding counter is connected to the disk fixing base through the rotating shaft fixing hole.

[0021] The advantages of this invention compared to the prior art are:

[0022] (1) This invention solves the problem of easy knotting and inconsistent lengths of the double wires of thermocouples with extremely small diameters in the process of making finished coils of a certain length during the preparation of electric arc wind tunnel experiments through structural design and material selection, thereby reducing the waste of thermocouples.

[0023] (2) By reducing the relative distance between the two arc-shaped winding end blocks, the present invention solves the problem that the finished wire is not easy to remove in the current device, and realizes simple and easy winding.

[0024] (3) The present invention uses an electronic winding counter, which solves the problem of tedious manual counting in the existing thermocouple winding process and effectively avoids the problem of over-counting and under-counting. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 This is a structural block diagram of the arc-shaped rapid winding device according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the thermocouple spool retainer structure according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the bottom of the thermocouple spool retainer structure according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the arc-shaped winding handle structure according to an embodiment of the present invention. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] This invention proposes an arc-shaped rapid winding device for temperature-measuring thermocouples used in arc wind tunnel experiments, such as... Figure 1 As shown, it includes a thermocouple bobbin holder 1, an arc-shaped winding handle 2, and an electronic winding counter 3.

[0032] Thermocouple spool retainer 1 Figure 2 As shown, the system includes a thermocouple spool holder 103, a thermocouple tensioning latch 101, a thermocouple paralleling latch 102, a thermocouple spool holder support foot 104, a reduction bearing 106, and a reduction shaft 107. A pair of temperature-sensing thermocouple spools 105 are placed on the reduction bearing 106. The reduction bearing 106 and the reduction shaft 107 increase the damping of the thermocouple spools, preventing excessive tension from causing the coils of the spools 105 to loosen and fall off. Furthermore, depending on actual needs, in cases of high or uneven tension, to better prevent the coils from falling off, belt grooves 110 are provided at the bottom ends of the two temperature-sensing thermocouple spools 105. Figure 3 As shown, a drive belt is installed in the groove 110 to allow the two spools 105 to rotate synchronously under the tension applied to the thermocouples. Additionally, a semi-circular tray 108 is provided on the outer side of the bottom end of each spool, and a baffle 109 is installed at a corresponding position in the middle of the spool. Both the baffle and the tray are fixed to the thermocouple spool mounting base. The distance between the tray and the baffle and the bottom end of the temperature-measuring thermocouple spool 105 is less than the diameter of the thermocouple, thus effectively preventing the wire on the spool from loosening, falling off, and getting tangled in the reduction bearing. The tray can be made of lightweight aluminum alloy.

[0033] The thermocouple paralleling bayonet 102 and the thermocouple tensioning bayonet 101 are made of polytetrafluoroethylene, which gives the inner surface of the hole at the paralleling bayonet 102 and the thermocouple tensioning bayonet 101 extremely low friction and high wear resistance, thus preventing the insulating varnish on the surface of the thermocouple from being worn away.

[0034] Arc-shaped winding handle 2 Figure 4As shown, the device includes a movable horizontal support rod 201, an arc-shaped winding end block 202, a magnetic suction block 203, a movable vertical support rod 204, a support rod fixing block 205, a disc fixing seat 206, and a rotating shaft fixing hole 207. The arc-shaped winding end block 202 consists of two semi-arc-shaped end blocks, preferably made of aluminum alloy or acrylic. The two semi-arc-shaped end blocks are connected by the movable vertical support rod 204. Each semi-arc-shaped end block is fixed to the disc fixing seat 206 by the movable horizontal support rod 201. The movable horizontal support rod 201 moves the connected end block inward, making it very easy to remove the finished coil. The arc-shaped winding end block 202 has a small toothed opening to secure the wire end during winding and prevent it from falling off. The outer surface is designed with a corrugated ring to prevent the coil from falling off during winding.

[0035] The disc mounting base 206 is connected to the electronic winding counter 3 via the rotating shaft fixing hole 207. A magnetic attractor 203 is fixed below the arc-shaped winding end block 202, and the magnetic attractor 203 and the movable vertical support rod 204 are magnetically attracted to each other. The movable vertical support rod 204 and the support rod fixing block 205 are connected by a pin. The support rod fixing block 205 has a semi-enclosed structure with three sides, ensuring that the movable vertical support rod 204 can move inward around the inward pin as an axis. The length of the movable vertical support rod 204 is related to the vertical distance between the two arc-shaped end blocks 202, ensuring that its upper end can move inward in an arc shape a certain distance away from the magnetic attractor 203, and that the upper surface of the vertical support rod is a slope with an inclination angle less than or equal to 30 degrees.

[0036] The electronic winding counter 3 can be either motorized or hand-cranked, and can display the number of turns corresponding to the actual required length. The electronic winding counter 3 can drive the disc fixing base 206 through the rotating shaft, thereby driving the arc-shaped winding end block 202 to start working.

[0037] A pair of thermocouple spools 105 are placed on a reduction bearing 106. After passing through the thermocouple parallel clamp 102, the two thermocouples pass through the thermocouple tension clamp 101, fixing the thermocouple ends to the toothed openings of the arc-shaped winding end block 202. When the electronic winding counter 3 is working, it drives the disc fixing base 206 to rotate via the rotating shaft, thereby causing the arc-shaped winding end block 202 to begin winding. The number of turns corresponding to a certain length will be displayed on the electronic winding counter 3. When the number of turns reaches the length required for the experiment, one end of the arc-shaped winding end block 202 is cut open, and the movable vertical support rod 204 that is attracted to the magnetic block is pushed inward to make it move away from the magnetic block 203. One side of the arc-shaped winding end block 202 moves inward accordingly, and the movable horizontal support rod 201 moves towards the middle of the arc-shaped winding end block 202, reducing the diameter between the two arc-shaped end blocks and the center, so that the finished temperature measuring thermocouple coil of a certain length falls off from the arc-shaped winding end block and is removed, thus completing the production of the finished temperature measuring thermocouple coil.

[0038] The embodiments described above are merely preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid arc-shaped winding device for a thermocouple used in an arc wind tunnel experiment, characterized in that, Includes thermocouple bobbin retainer and arc-shaped winding handle; A pair of thermocouple spools are placed on the thermocouple spool holder, and the thermocouples on the two spools are led out in parallel. The arc-shaped winding handle includes an arc-shaped winding end block, a movable horizontal support rod, a movable vertical support rod, and a disc fixing seat; one end of each of the two movable horizontal support rods is movably connected to the disc fixing seat, and the other end is fixedly connected to the two arc-shaped winding end blocks; the two arc-shaped winding end blocks are placed vertically and face each other in an arc shape, and the thermocouples after being wired together are wound around the outer surface of the two arc-shaped winding end blocks; both ends of the movable vertical support rod are movably connected to the two arc-shaped winding end blocks respectively; The thermocouple spool retainer includes a thermocouple spool fixing seat, a reduction shaft, a reduction bearing, a thermocouple paralleling bayonet, and a thermocouple tensioning bayonet. The thermocouple spool fixing seat includes a bottom surface and a vertical surface. Two reduction shafts are installed on the bottom surface, and each reduction shaft is equipped with a reduction bearing. A pair of thermocouple spools are respectively fitted onto the two reduction shafts. The vertical surface is provided with a thermocouple paralleling clamp and a thermocouple tensioning clamp on the upper surface of the vertical surface. The thermocouples on a pair of thermocouple spools pass sequentially through the thermocouple paralleling bayonet and the thermocouple tensioning bayonet before being led out to the arc-shaped winding handle; Each thermocouple spool has an arc-shaped tray on the outer side of its bottom end, and baffles are provided at the opposite positions of the two spools. Both the baffles and the trays are fixed on the bottom surface of the thermocouple spool fixing seat. The distance between the trays and the baffles and the bottom end of the spools is less than the diameter of the thermocouple. The top of the movable vertical support rod is connected to the upper arc-shaped winding end block via a magnetic block; after the movable vertical support rod is manually pushed, the movable vertical support rod separates from the magnetic block and the upper arc-shaped winding end block.

2. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, A belt groove is provided at the bottom end of the two thermocouple spools, and a drive belt is installed in the groove to make the two spools rotate synchronously.

3. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, The thermocouple parallel clamp and thermocouple tension clamp are made of polytetrafluoroethylene.

4. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, The thermocouple wire shaft retainer also includes a strut fixing block. The bottom end of the movable vertical strut is connected to the lower arc-shaped winding end block through the strut fixing block. The strut fixing block is a semi-enclosed structure with an open top and an empty side wall opposite to the disc fixing seat. The movable vertical strut and the strut fixing block are connected by a pin. The movable vertical strut can move around the pin as an axis.

5. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, The upper surface of the movable vertical strut is an inclined plane with an inclination angle not exceeding 30 degrees.

6. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, The curved winding end block has a toothed opening and a corrugated outer surface.

7. The arc-shaped rapid winding device for a thermocouple used in an arc wind tunnel experiment according to claim 1, characterized in that, It also includes an electronic winding counter, with a rotating shaft fixing hole in the center of the disk mounting base, through which the electronic winding counter is connected to the disk mounting base.

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