Rotating high-voltage electrode for coaxial cylindrical explosion drive

Abstract

The present invention discloses a rotary high-voltage electrode for a coaxial cylindrical deflagration drive device, comprising a conductive core, an insulating sleeve, a threaded pressure cap, a sealing pressure ring, and a locking screw; the conductive core has a first conductive core portion, a second conductive core portion, and a third conductive core portion; a rotating winding is sleeved on the locking screw, the rotating winding is located on the side of the locking screw close to the center hole, and the third conductive core portion is connected to the locking screw at one end away from the second conductive core portion; a groove is provided on the rotating winding, wherein the first direction is the direction in which the third conductive core portion points to the first conductive core portion; the insulating sleeve has a first covering portion, a second covering portion, and a third covering portion that match the first conductive core portion; and sealing rings are respectively installed on the contact surface between the sealing pressure ring and the deflagration drive section and the contact surface between the sealing pressure ring and the third covering portion. The present invention facilitates the installation or replacement of the ignition wire and can ensure that the ignition wire and the deflagration drive section are precisely coaxial.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental research on high-temperature and high-speed gas dynamics, high-speed aircraft, etc., and more specifically, to a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device. Background Art

[0002] Shock tube / wind tunnel is a kind of experimental equipment widely used in the fields of high temperature and high speed gas dynamics, high speed aircraft, etc. The basic principle is: high pressure driving gas compresses low pressure test gas through shock wave to make it reach the required test state. Figure 1 As shown, a typical shock tube / wind tunnel includes a driving section 1', a driven section 2', a nozzle 3', and a test section 4'. Before the test, the driving section 1' and the driven section 2' are separated by a diaphragm 5'. The driving section 1' is filled with high-pressure driving gas, and the driven section 2' is filled with low-pressure test gas. During the test, the diaphragm 5' ruptures, and the high-pressure gas expands and enters the driven section 2', simultaneously generating a rapidly moving shock wave in the driven section 2'. If the test is conducted directly using the gas after the shock wave, the equipment operates in shock tube mode. If the test is conducted using the test gas accelerated by the nozzle 3', the equipment operates in shock tunnel mode.

[0003] The total temperature and total pressure range of the test gas are key indicators of equipment capability, both of which depend on the driving power of the high-pressure drive gas. Room-temperature, high-pressure gas is no longer sufficient to meet increasingly demanding testing requirements. To address this, three high-performance drive technologies have been developed domestically and internationally: piston drive, heated light gas drive, and detonation drive. Detonation drive, with its low cost, simple structure, and relative safety, is currently the mainstream technology in China.

[0004] The detonation-driven shock tube was first proposed by Bird in 1957. In 1981, Mr. Yu Hongru of the Institute of Mechanics, Chinese Academy of Sciences, built a 13.3-meter-long detonation-driven shock tube, which was put into operation in 1983. In 1994, the Institute of Mechanics, Chinese Academy of Sciences, developed the JF-10 detonation-driven high-enthalpy shock tunnel [see Yu Hongru, Zhao Wei, and Yuan Shengxue, Performance of Hydrogen-Oxygen Detonation-Driven Shock Tunnels - Aerodynamic Test and Measurement Control, 1993, 7(3): 38-42]. With the help of Mr. Yu Hongru, Gronig et al. built a high-enthalpy shock tunnel (TH2-D) using reverse detonation drive at the RWTH Aachen University in Germany in 1993. In 1994, NASA modified the original free-piston-driven design and built the forward detonation-driven high-enthalpy shock tunnel (HYPULSE) at GASL. The tunnel can operate in both reflected shock tunnel mode and expansion tube mode [see Chue RSM, Tsai CY, Bakos RJ, Erdos JI, Rogers RC (2002) NASA's HYPULSE Facility at GASL - ADual Mode, Dual Driver Reflected-Shock / Expansion Tunnel. In: Lu F, Marren D (eds), Advanced Hypersonic Test Facilities, Progress in Astronautics and Aeronautics, Vol. 198, AIAA, Chapter 3, pp29-71].

[0005] Detonation drive requires the formation of an axially propagating detonation wave within the drive section. The uneven flow field behind the detonation wave causes the following problems with this drive technology: First, the range of gas mixture ratios that can detonate is much narrower than the range that can deflagrate, and the temperature and sound velocity ranges of the driving gas are also correspondingly narrower, thus limiting the total temperature range of the test gas that can be provided by the detonation drive; second, the effective driving pressure provided by the detonation drive does not exceed 40% of the equipment's pressure limit, limiting the total pressure range of the test gas.

[0006] Since the above problems exist in detonation drive, it is necessary to overcome them and introduce coaxial cylindrical deflagration drive technology. However, the coaxial cylindrical deflagration drive technology requires high-voltage electrodes to be plugged into both ends of the drive section, and an ignition wire is arranged between the two high-voltage electrodes along the center line of the drive section axis. However, the high-voltage electrode still needs to meet the following requirements: (1) The deflagration drive technology requires the generation of high-temperature and high-pressure gas of several MPa to nearly 100 MPa in the drive section pipeline, and the sealing of the electrode and the tube body must be ensured; at the same time, the electrode and the tube body must be insulated and withstand high voltage electricity of tens of thousands of volts; (2) In order to ensure the precise coaxiality of the ignition wire and the drive section pipeline, the two high-voltage electrodes need to straighten the ignition wire of 10 meters or even longer, and a new ignition wire needs to be replaced before each experiment. Therefore, the electrode should also be as easy as possible to install the ignition wire; (3) Since the metal diaphragm often rebounds after rupture, it is also necessary to avoid damage to the electrode caused by the high-speed impact of the metal diaphragm. To meet the above requirements, ordinary high-voltage electrodes include a conductive core electrode, the outer surface of which is covered with an insulating layer. When the conductive chip is installed on the equipment, in order to facilitate fastening, a thread is inserted on the outer surface of the insulating layer to fasten it to the equipment, but it cannot meet the requirements of coaxial cylindrical deflagration drive technology.

[0007] Existing document 1 (CN2228804Y) discloses a high-voltage electrode rod having a rod body, end caps and a coupling seat. A cable copper core is provided in the middle of the rod body and is surrounded by a cable insulation layer. A screw plug is provided on the exposed portion of the lower end of the cable copper core. End caps sealed with threads are provided on the outer ends of the screw plug and the rod body. A conical locking bolt and a locking nut for locking the cable are provided on the upper part of the coupling seat. The rod body has been increased from the original 450 mm to about 600 mm. However, the high-voltage electric shock rod still fails to solve the above-mentioned technical problems. In addition, the high-voltage electric shock rod is relatively thick and inconvenient to operate.

[0008] Existing document 2 (CN102407947A) discloses a shock tunnel detonation dual-drive device, comprising: a shock tunnel, the shock tunnel having a detonation drive section, one end of the detonation drive section is provided with a detonation unloading section, and the other end is provided with a driven section; a first diaphragm is provided between the detonation unloading section and the detonation drive section, and a second diaphragm is provided between the driven section and the detonation drive section; a forward detonation drive ignition device is provided at a section of the detonation drive section close to the detonation unloading section, and a reverse detonation drive ignition device is provided at a section of the detonation drive section close to the driven section; a controllable delay trigger is connected between the forward detonation drive ignition device and the reverse detonation drive ignition device. The invention relates to a device and a method as follows: 1) a forward detonation ignition device is provided at one end of a detonation driving section of a shock tunnel close to a detonation unloading section, and a reverse detonation driving ignition device is provided at one end of the detonation driving section close to a driven section; 2) ignition is performed by the forward detonation ignition device to form a forward-driven detonation wave; 3) after the forward detonation wave propagates along the detonation driving section for a predetermined time, ignition is performed by the reverse detonation driving ignition device to form a reverse-driven detonation wave; 4) the reverse-driven detonation wave tears a diaphragm provided between the driven section and the detonation driving section, and the forward detonation wave and the reverse detonation wave intersect to form a moving shock wave, which enters the driven section to compress the test gas in the driven section.

[0009] In order to meet the coaxial cylindrical deflagration drive technology, the present invention proposes a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device, and the rotating high-voltage electrode for a coaxial cylindrical deflagration drive device is not easily conceived by those skilled in the art. Summary of the Invention

[0010] In view of this, the present invention provides a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device, characterized in that:

[0011] It includes a conductive core, an insulating sleeve, a threaded pressure cap, a sealing pressure ring, and a locking screw, wherein the insulating sleeve is covered on the outer surface of the conductive core, the sealing pressure ring and the threaded pressure cap are both sleeved on the outer surface of the insulating sleeve, and the conductive core covered with the insulating sleeve is plugged into the deflagration drive section and connected to the deflagration drive section through the threaded pressure cap;

[0012] The conductive core has a first conductive core portion, a second conductive core portion and a third conductive core portion, one end of the second conductive core portion is connected to an end of the first conductive core portion close to the second conductive core portion, and the other end is connected to an end of the third conductive core portion close to the second conductive core portion, and the end of the first conductive core portion away from the second conductive core portion is electrically connected to a high voltage power supply;

[0013] The diameters of the first conductive core portion and the third conductive core portion are both smaller than the diameter of the second conductive core portion;

[0014] A central hole for passing an ignition wire is formed on a side of the third conductive core portion away from the second conductive core portion, and the central hole is coaxial with the deflagration drive section;

[0015] A rotating winding is sleeved on the locking screw, and the rotating winding is located on the side of the locking screw close to the center hole, and the end of the third conductive core portion away from the second conductive core portion is connected to the locking screw;

[0016] The rotating winding is provided with grooves arranged along a first direction and a circumferential direction, wherein the first direction is the direction from the third conductive core pole portion to the first conductive core pole portion;

[0017] The insulating sleeve has a first covering portion matched with the first conductive core portion, a second covering portion corresponding to the second conductive core portion, and a third covering portion matched with the third conductive core portion, wherein, along the first direction, the length of the first conductive core portion is a1, the length of the third conductive core portion is a2, the length of the first covering portion is b1, and the length of the third covering portion is b2, a1>b1, a2>b2;

[0018] The sealing pressure ring is located on the side of the third covering portion close to the second covering portion, the threaded pressure cap is located on the side of the first covering portion close to the second covering portion, and the second covering portion is located between the sealing pressure ring and the threaded pressure cap;

[0019] The contact surface between the sealing pressure ring and the explosion driving section and the contact surface between the sealing pressure ring and the third covering portion are respectively installed with sealing rings.

[0020] Optionally, a threaded hole is provided at one end of the third conductive core portion away from the second conductive core portion, and the end of the third conductive core portion away from the second conductive core portion is connected to a side of the locking screw close to the center hole through a threaded connection.

[0021] Optionally, an elastic member is sleeved on the locking screw, and the elastic member is located on the side of the locking screw away from the center hole. One end of the elastic member is fixedly connected to the rotating winding, and the other end is fixedly connected to the locking screw.

[0022] Optionally, the locking screw includes a screw rod and a screw head connected to the screw rod, the rotating winding and the elastic member are sleeved on the screw rod, the other end of the elastic member is fixedly connected to the screw head, and a threaded hole is provided at one end of the third conductive core pole portion away from the second conductive core pole portion, and the screw rod and the threaded hole are connected by threads.

[0023] Optionally, the diameter of the middle portion of the second conductive core portion is larger than the diameter of the second conductive core portion at both ends, and along the first direction, the diameter of the middle portion of the second conductive core portion gradually decreases toward both ends.

[0024] Optionally, the insulating sleeve is made of radiation cross-linked polyolefin material.

[0025] Optionally, the diameter of the conductive core electrode is 5mm-20mm.

[0026] Optionally, the shape of the groove is one or more of a teardrop shape, an oval shape, a heart shape, a triangle shape, a diamond shape, and a rectangle shape.

[0027] Compared with the prior art, the rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by the present invention achieves at least the following beneficial effects:

[0028] First, the center hole on the third conductive core portion is coaxial with the deflagration drive section, and the center hole on the third conductive core portion, the locking screw, the rotating winding and / or the elastic member cooperate with each other, which not only facilitates the installation or replacement of the ignition wire, but also ensures that the ignition wire and the deflagration drive section are precisely coaxial;

[0029] Second, by making the diameters of the first conductive core portion and the third conductive core portion smaller than the diameter of the second conductive core portion, that is, the second conductive core portion is a protruding portion, it is possible to prevent the conductive core from flying out under the action of the high voltage in the deflagration drive section;

[0030] Third, the insulating sleeve wrapped around the outer surface of the conductive core ensures the insulation between the conductive core and the explosive drive section, and can withstand high voltages of tens of thousands of volts.

[0031] Fourth, the sealing rings installed on the contact surface between the sealing pressure ring and the deflagration drive section and the contact surface between the sealing pressure ring and the third covering portion can ensure the airtightness of the insulating sleeve sleeved on the outer surface of the conductive core and the deflagration drive section.

[0032] Of course, any product implementing the present invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0033] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0035] Figure 1This is a schematic diagram of the structure of a shock tube / wind tunnel provided in the prior art;

[0036] Figure 2 This is a schematic structural diagram of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0037] Figure 3 This is an exploded view of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0038] Figure 4 is a cross-sectional view of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0039] Figure 5 This is a schematic structural diagram of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0040] Figure 6 This is an exploded view of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0041] Figure 7 This is a cross-sectional view of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention;

[0042] Figure 8 This is an assembly diagram of a locking screw, an elastic member, and a rotating ring provided in an embodiment of the present invention;

[0043] Figure 9 1 is a schematic structural diagram of a conductive core electrode provided by an embodiment of the present invention;

[0044] Figure 10 1 is a schematic structural diagram of an insulating sleeve provided by an embodiment of the present invention;

[0045] Figure 11 This is a schematic structural diagram of one end portion of a deflagration drive section provided by an embodiment of the present invention;

[0046] Figure 12 Schematic diagram of the structure of a coaxial cylindrical deflagration drive device for a shock tube / wind tunnel provided by an embodiment of the present invention;

[0047] Figure 13 yes Figure 12 A magnified diagram of the structure of the discharge system;

[0048] Figure 14 This is a logic block diagram of a discharge system provided by an embodiment of the present invention;

[0049] Figure 15Schematic diagram of the structure of a shock tube / wind tunnel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0051] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0052] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0053] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0054] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] Figure 2 This is a schematic structural diagram of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 3 This is an exploded view of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 4 is a cross-sectional view of a rotating high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 5 This is a schematic structural diagram of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 6 This is an exploded view of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 7 This is a cross-sectional view of another rotary high-voltage electrode for a coaxial cylindrical deflagration drive device provided by an embodiment of the present invention; Figure 8 This is an assembly diagram of a locking screw, an elastic member, and a rotating ring provided in an embodiment of the present invention; Figure 9 1 is a schematic structural diagram of a conductive core electrode provided by an embodiment of the present invention; Figure 10 1 is a schematic structural diagram of an insulating sleeve provided by an embodiment of the present invention; Figure 11 This is a schematic structural diagram of one end portion of the deflagration drive section provided by an embodiment of the present invention; Figure 2-8As shown, this embodiment provides a rotary high-voltage electrode 1000 for a coaxial cylindrical deflagration drive device, comprising a conductive core electrode 100, an insulating sleeve 200, a threaded pressure cap 300, a sealing pressure ring 400, and a locking screw 500, wherein the insulating sleeve 200 is coated on the outer surface of the conductive core electrode 100, the sealing pressure ring 400 and the threaded pressure cap 300 are both sleeved on the outer surface of the insulating sleeve 200, and the conductive core electrode 100 coated with the insulating sleeve 200 is plugged into the deflagration drive section 1 and connected to the deflagration drive section 1 through the threaded pressure cap 300;

[0056] The conductive core 100 comprises a first conductive core portion 101, a second conductive core portion 102 and a third conductive core portion 103, wherein one end of the second conductive core portion 102 is connected to an end of the first conductive core portion 101 close to the second conductive core portion 102, and the other end is connected to an end of the third conductive core portion 103 close to the second conductive core portion 102, and an end of the first conductive core portion 101 away from the second conductive core portion 102 is electrically connected to a high voltage power supply;

[0057] The diameters of the first conductive core portion 101 and the third conductive core portion 103 are both smaller than the diameter of the second conductive core portion 102 , and the diameter of the first conductive core portion 101 is the same as the diameter of the third conductive core portion 103 ;

[0058] A central hole 1031 for passing the ignition wire is formed on the side of the third conductive core portion 103 away from the second conductive core portion 102, and the central hole 1031 is coaxial with the deflagration driving section;

[0059] The locking screw 500 is sleeved with a rotating winding 501, and the rotating winding 501 is located on the side of the locking screw 500 close to the central hole 1031. The end of the third conductive core portion 103 away from the second conductive core portion 102 is connected to the locking screw 500.

[0060] The rotating winding 501 is provided with grooves 5011 arranged along the first direction E and along the circumferential direction. The first direction E is the direction from the third conductive core pole portion 103 to the first conductive core pole portion 101.

[0061] The insulating sleeve 200 has a first covering portion 201 that matches the first conductive core portion 101, a second covering portion 202 that corresponds to the second conductive core portion 102, and a third covering portion 203 that matches the third conductive core portion 103, wherein along the first direction E, the length of the first conductive core portion 101 is a1, the length of the third conductive core portion 103 is a2, the length of the first covering portion 201 is b1, and the length of the third covering portion 203 is b2, a1>b1, a2>b2;

[0062] The sealing ring 400 is located on the side of the third covering portion 203 close to the second covering portion 202, the threaded pressing cap 300 is located on the side of the first covering portion 201 close to the second covering portion 202, and the second covering portion 202 is located between the sealing ring 400 and the threaded pressing cap 300;

[0063] The contact surface between the sealing pressure ring 400 and the deflagration driving section 1 and the contact surface between the sealing pressure ring 400 and the third covering portion 203 are respectively installed with sealing rings 401 .

[0064] Specifically, the rotary high-voltage electrode 1000 for the coaxial cylindrical deflagration drive device includes a conductive core electrode 100, an insulating sleeve 200, a threaded pressure cap 300, a sealing pressure ring 400, and a locking screw 500. In order to ensure the insulation between the deflagration drive segment and the conductive core electrode 100, the insulating sleeve 200 is sleeved on the outer surface of the conductive core electrode 100, and the sealing pressure ring 400 and the threaded pressure cap 300 are sleeved on the outer surface of the insulating sleeve 200. In order to ensure that the rotary high-voltage electrode is plugged into the deflagration drive segment 1, an opening 8 that matches the rotary high-voltage electrode is opened on the deflagration drive segment 1. The conductive core electrode 100 sleeved with the insulating sleeve 200 is plugged into the deflagration drive segment through the opening 8 and is connected to the deflagration drive segment 1 through the threaded pressure cap 300.

[0065] The conductive core 100 comprises a first conductive core portion 101, a second conductive core portion 102 and a third conductive core portion 103, one end of the second conductive core portion 102 is connected to an end of the first conductive core portion 101 close to the second conductive core portion 102, and the other end thereof is connected to an end of the third conductive core portion 103 close to the second conductive core portion 102, and an end of the first conductive core portion 101 away from the second conductive core portion 102 is electrically connected to a high voltage power supply;

[0066] The diameters of the first conductive core portion 101 and the third conductive core portion 103 are both smaller than the diameter of the second conductive core portion 102. The diameter of the first conductive core portion 101 and the diameter of the third conductive core portion 103 may be the same. The diameters of the first conductive core portion 101 and the third conductive core portion 103 are both smaller than the diameter of the second conductive core portion 102. That is, the second conductive core portion 102 is a protruding portion, which can prevent the conductive core 100 from flying out under the action of the high pressure in the deflagration drive section. It can be understood that this is to prevent the rotary high-voltage electrode from being pushed out when the pressure in the deflagration drive section is high;

[0067] The third conductive core portion 103 is provided with a central hole 1031 on a side away from the second conductive core portion 102, through which the ignition wire can pass, and the central hole 1031 is coaxial with the deflagration drive section;

[0068] A rotating winding 501 is sleeved on the locking screw 500. The rotating winding 501 can be a hollow hexagonal prism or a hollow cylinder. The rotating winding 501 is located on the side of the locking screw 500 close to the center hole 1031. The end of the third conductive core portion 103 away from the second conductive core portion 102 is connected to the locking screw 500.

[0069] In order to facilitate winding of the ignition wire, grooves 5011 are provided on the rotating winder 501. The grooves 5011 are arranged along the second direction F and along the circumferential direction. There is a spacing between adjacent grooves 5011. The shape of the grooves 5011 can be teardrop-shaped, oval-shaped, heart-shaped, triangular, diamond-shaped and / or rectangular. The specific shape of the grooves 5011 is not limited.

[0070] The insulating sleeve 200 has a first covering portion 201 that matches the first conductive core pole portion 101, a second covering portion 202 corresponding to the second conductive core pole portion 102, and a third covering portion 203 that matches the third conductive core pole portion 103. The insulating sleeve 200 is made of radiation-crosslinked polyolefin material. By using radiation-crosslinked polyolefin material in the insulating sleeve 200, it can not only withstand high temperature and high pressure, but also has a certain mechanical strength; wherein, along the first direction E, the length of the first conductive core pole portion 101 is a1, the length of the third conductive core pole portion 103 is a2, the length of the first covering portion 201 is b1, and the length of the third covering portion 203 is b2, a1>b1, a2>b2, and the length of the first conductive core pole portion 101 is a1. The length a1 is greater than the length b1 of the first covering portion 201, that is, the first conductive core portion 101 is exposed on the side away from the second conductive core portion 102, which is convenient for connecting the high-voltage power supply, and the third conductive core portion 103 is also exposed on the side away from the second conductive core portion 102, which is convenient for installing the ignition wire. Specifically, it is convenient to pass one side of the ignition wire through the center hole 1031 and wind it on the rotating winder 501; it can be understood that the two ends of the conductive core 100 do not need to be covered with the insulating sleeve 200; of course, in order to improve the convenience of operation, the length a1 of the first conductive core portion 101 can be greater than the length a2 of the third conductive core portion 103. By setting a1>a2, it is convenient for the operator to electrically connect the high-voltage power supply to the first conductive core portion 101;

[0071] The sealing pressure ring 400 is located on the side of the third covering portion 203 close to the second covering portion 202, the threaded pressure cap 300 is located on the side of the first covering portion 201 close to the second covering portion 202, and the second covering portion 202 is located between the sealing pressure ring 400 and the threaded pressure cap 300. Since the second conductive core pole portion 102 is a protruding portion, the second covering portion 202 corresponds to the second conductive core pole portion 102, and therefore the second covering portion 202 is also a protruding portion. In order to avoid an uneven contact surface between the second covering portion 202 covering the outer surface of the second conductive core pole portion 102 and the opening 8 in the deflagration driving section 1, the sealing pressure ring 400 is sleeved on the side of the third covering portion 203 close to the second covering portion 202, and the sealing pressure ring 400 is abutted against the opening 8 of the deflagration driving section 1 through the threaded pressure cap 300.

[0072] Since the deflagration drive technology requires the generation of high-temperature and high-pressure combustion gas of several MPa to nearly 100 MPa in the deflagration drive section 1, the sealing between the rotating high-voltage electrode and the deflagration drive section must be ensured. A sealing ring 401 is respectively installed on the contact surface between the sealing pressure ring 400 and the deflagration drive section and the contact surface between the sealing pressure ring 400 and the third covering portion 203. The sealing ring 401 is an O-ring, that is, an O-ring is installed on the contact surface between the sealing pressure ring 400 and the insulating sleeve 200 and the contact surface between the sealing pressure ring 400 and the deflagration drive section to ensure the airtightness between the rotating high-voltage electrode and the deflagration drive section.

[0073] The locking screw 500 is sleeved with a rotating winding 501, and the rotating winding 501 is located on the side of the locking screw 500 close to the center hole 1031. The end of the third conductive core portion 103 away from the second conductive core portion 102 is connected to the locking screw 500. There are the following two embodiments:

[0074] Example 1:

[0075] Reference Figure 2-4 ,as well as Figure 9 and Figure 11 As shown, a threaded hole 1032 is formed at one end of the third conductive core portion 103 away from the second conductive core portion 102, and the end of the third conductive core portion 103 away from the second conductive core portion 102 is connected to the side of the locking screw 500 close to the center hole 1031 through a threaded connection;

[0076] In specific use, combined with the entire solution, first, the sealing pressure ring 400 is abutted against the opening 8 on the deflagration drive segment 1, and then the conductive core electrode 100 covered with the insulating sleeve 200 is inserted into the deflagration drive segment 1, and mechanically connected to the deflagration drive segment 1 through the threaded pressure cap 300; It should be noted that: two insulating sleeves 200 sleeved on the outer surface of the conductive core electrode 100 need to be inserted into the deflagration drive segment 1, and the two insulating sleeves 200 sleeved on the outer surface of the conductive core electrode 100 are respectively inserted at both ends of the deflagration drive segment 1;

[0077] Next, first, sleeve the rotating winding 501 onto the locking screw 500, and then connect the locking screw 500 to the third conductive core portion 103;

[0078] Finally, since the conductive core pole 100 covered with the insulating sleeve 200 is respectively inserted at both ends of the deflagration driving segment 1, the center hole 1031 on the third conductive core pole portion 103 is located on the axis of the deflagration driving segment 1. After the ignition wire passes through the center hole 1031, it is wound on the rotating winding 501 and fixed. Loosen the locking screw 500, rotate the rotating winding 501 to tighten the ignition wire, and then tighten the locking screw 500 to fix the rotating winding 501 so that the ignition wire is in a straightened state. This solution not only can keep the ignition wire in a straightened state, but also facilitates the installation and replacement of the ignition wire, and is highly practical.

[0079] Example 2:

[0080] Reference Figure 5-11 As shown, an elastic member 502 is also sleeved on the locking screw 500. The elastic member 502 is located on the side of the locking screw 500 away from the center hole 1031. One end of the elastic member 502 is fixedly connected to the rotating winding 501, and the other end is fixedly connected to the locking screw 500.

[0081] Specifically, in combination with the entire solution, an elastic member 502 is also sleeved on the locking screw 500. The elastic member 502 can be a spring. The elastic member 502 is located on the side of the locking screw 500 away from the center hole 1031. One end of the elastic member 502 is fixedly connected to the rotating winding 501, and the other end is fixedly connected to the locking screw 500. That is to say, in order to facilitate the ignition wire to pass through the center hole 1031 and be wound around the rotating winding 501 and fixed, the rotating winding 501 is located on the side close to the center hole 1031 and the spring is located on the side away from the center hole 1031. One end of the elastic member 502 can be fixedly connected to the end of the rotating winding 501 away from the center hole 1031, and the other end can be fixedly connected to the end of the locking screw 500 away from the center hole 1031. The fixed connection method can be welding or other methods can be used, as long as the fixed connection can be achieved. The above solution can not only make the installation of the ignition wire more convenient, but also provide greater tensioning force.

[0082] When in use, first, the sealing pressure ring 400 is abutted against the opening 8 on the deflagration drive segment 1, and then the conductive core electrode 100 covered with the insulating sleeve 200 is inserted into the deflagration drive segment 1, and mechanically connected to the deflagration drive segment 1 through the threaded pressure cap 300; It should be noted that: two insulating sleeves 200 sleeved on the outer surface of the conductive core electrode 100 need to be inserted into the deflagration drive segment 1, and the two insulating sleeves 200 sleeved on the outer surface of the conductive core electrode 100 are respectively inserted at both ends of the deflagration drive segment 1;

[0083] Next, the locking screw 500 with the elastic member 502 and the rotating winding 501 is connected to the third conductive core portion 103;

[0084] Finally, since the conductive core pole 100 covered with the insulating sleeve 200 is respectively inserted at both ends of the deflagration driving section 1, after the two ends of the ignition wire are respectively passed through the center hole 1031 on the conductive core pole 100, first rotate a rotating winding 501 several times to make the elastic part 502 in a taut state, and then wrap one end of the ignition wire around the rotating rotating winding 501 and fix it, and then rotate the rotating winding 501 on the other side several times to make the elastic part 502 in a taut state, and then wrap the other end of the ignition wire around the rotating rotating winding 501 and fix it. After loosening the rotating winding 501, use the elasticity of the elastic part 502 to straighten the ignition wire.

[0085] It can be seen from the above embodiments that the rotary high-voltage electrode 1000 for the coaxial cylindrical deflagration drive device provided by the present invention achieves at least the following beneficial effects:

[0086] The central hole 1031 on the third conductive core portion 103 is coaxial with the deflagration drive segment, and the central hole 1031 on the third conductive core portion 103, the locking screw 500, the rotating winding 501 and / or the elastic member 502 cooperate with each other, which not only facilitates the installation or replacement of the ignition wire, but also ensures that the ignition wire and the deflagration drive segment 1 are precisely coaxial.

[0087] Second, by making the diameters of the first conductive core portion 101 and the third conductive core portion 103 smaller than the diameter of the second conductive core portion 102, that is, the second conductive core portion 102 is a protruding portion, it is possible to prevent the conductive core 100 from flying out under the action of the high voltage in the deflagration drive section;

[0088] Third, the insulating sleeve 200 wrapped around the outer surface of the conductive core 100 can ensure the insulation between the conductive core 100 and the explosive driving section, and can withstand high voltage electricity of tens of thousands of volts;

[0089] Fourth, by installing sealing rings 401 on the contact surface between the sealing pressure ring 400 and the deflagration drive section and on the contact surface between the sealing pressure ring 400 and the third covering portion 203, the airtightness of the insulating sleeve 200 sleeved on the outer surface of the conductive core pole 100 and the deflagration drive section can be ensured.

[0090] In some optional embodiments, continue to refer to Figure 8 As shown, the locking screw 500 includes a screw rod 503 and a screw head 504 connected to the screw rod 503, the rotating winding 501 and the elastic member 502 are sleeved on the screw rod 503, and the other end of the elastic member 502 is fixedly connected to the screw head 504. The third conductive core pole portion 103 is provided with a threaded hole 1032 at one end away from the second conductive core pole portion 102, and the screw rod 503 is connected to the threaded hole 1032 by a thread. That is, first, the elastic member 502 is screwed. The elastic member 502 is sleeved on the screw rod 503, and then the rotating winding 501 is sleeved on the screw rod 503. The elastic member 502 is adjacent to the screw head 504. The elastic member 502 is located between the screw head 504 and the rotating winding 501. One end of the elastic member 502 is fixed on the screw head 504, and the other end of the elastic member 502 is fixed on the rotating winding 501. Finally, the screw rod 503 is connected to the threaded hole 1032 on the third conductive core pole part 103 through a thread. The structure is simple, practical and low in cost.

[0091] In some optional embodiments, continue to refer to Figure 7 and Figure 9 As shown, the diameter of the middle part of the second conductive core pole portion 102 is larger than the diameter of the two ends of the second conductive core pole portion 102, and along the first direction E, the middle part of the second conductive core pole portion 102 gradually decreases toward the two ends. By adopting this solution, the conductive core pole 100 can be more effectively prevented from flying out under the action of high air pressure.

[0092] In some optional embodiments, continue to refer to Figure 5 、 Figure 7 and Figure 9As shown, if the diameter of the conductive core electrode 100 is designed to be less than 5 mm, the conductive core electrode 100 is too thin and the strength is insufficient; if the diameter of the conductive core electrode 100 is designed to be greater than 20 mm, the conductive core electrode 100 is too thick and inconvenient to operate. Therefore, the diameter range of the conductive core electrode 100 is 5 mm-20 mm, which not only ensures the strength of the conductive core electrode 100 and prevents the conductive core electrode 100 from being damaged by the high-speed impact of the metal diaphragm, but also facilitates operation. Since the diameters of the first conductive core electrode portion 101 and the third conductive core electrode portion 103 are both smaller than the diameter of the second conductive core electrode portion 102, the diameter range of the second conductive core electrode portion 102 can be 11-20 mm, and the diameters of the first conductive core electrode portion 101 and the third conductive core electrode portion 103 are both 5-10 mm. For example, the diameter of the second conductive core electrode portion 102 can be 20 mm, and the diameters of the first conductive core electrode portion 101 and the third conductive core electrode portion 103 are both 10 mm.

[0093] It can be seen from the above embodiments that the rotary high-voltage electrode for the coaxial cylindrical deflagration drive device provided by the present invention achieves at least the following beneficial effects:

[0094] First, the central hole on the third conductive core portion is coaxial with the deflagration drive section, which not only facilitates the installation or replacement of the ignition wire, but also ensures that the ignition wire and the deflagration drive section are precisely coaxial;

[0095] Second, by making the diameters of the first conductive core portion and the third conductive core portion smaller than the diameter of the second conductive core portion, that is, the second conductive core portion is a protruding portion, it is possible to prevent the conductive core from flying out under the action of the high voltage in the deflagration drive section;

[0096] Third, the insulation sleeve wrapped around the outer surface of the conductive core ensures the insulation between the conductive core and the explosive drive section, and can withstand high voltage of tens of thousands of volts;

[0097] Fourth, the sealing rings installed on the contact surface between the sealing pressure ring and the deflagration drive section and the contact surface between the sealing pressure ring and the third covering portion can ensure the airtightness of the insulating sleeve sleeved on the outer surface of the conductive core and the deflagration drive section.

[0098] Figure 11 This is a schematic structural diagram of one end portion of a deflagration drive section provided by an embodiment of the present invention; Figure 12 Schematic diagram of the structure of a coaxial cylindrical deflagration drive device for a shock tube / wind tunnel provided by an embodiment of the present invention; Figure 13 yes Figure 12 A magnified diagram of the structure of the discharge system; Figure 14 This is a logic block diagram of a discharge system provided by an embodiment of the present invention; see Figure 11-14As shown, this embodiment also provides a coaxial cylindrical deflagration drive device for a shock tube / wind tunnel, comprising a deflagration drive section 1 and a driven section 2. One end of the deflagration drive section 1 is connected to the driven section 2, and the other end is connected to a blind plate 14. A diaphragm 5 is provided between the deflagration drive section 1 and the driven section 2. The driven section 2 is connected to a test section 4 via a nozzle 3. The blind plate 14 is a flange cover. The blind plate 14 is used to block the end of the deflagration drive section 1, eliminating the need for a traditional explosion unloading section and the provision of a diaphragm between the explosion unloading section and the deflagration drive section. This not only helps to reduce the occupied space area, but also reduces costs.

[0099] A first rotating high-voltage electrode 11 and a second rotating high-voltage electrode 12 extending along the radial direction Y are plugged into the deflagration driving section 1. The first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 have the same structure and both include the rotating high-voltage electrode for the coaxial cylindrical deflagration driving device provided in the embodiment of the present invention. The first rotating high-voltage electrode 11 is located on the side of the deflagration driving section 1 close to the blind plate 14, and the second rotating high-voltage electrode 12 is located on the side of the deflagration driving section 1 close to the driven section 2, that is, the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 are plugged into the two ends of the deflagration driving section 1; an ignition wire 13 extending in the axial direction is electrically connected between the center hole 1031 on the first rotating high-voltage electrode 11 and the center hole 1031 on the second rotating high-voltage electrode 12, the axial direction X is the direction from the blind plate 14 to the axial centerline of the driven section 2, and the radial direction Y intersects with the axial direction X; optionally, the ignition wire 13 can be made of any metal material selected from copper, silver, nickel-chromium, tungsten and alloys, and the length of the ignition wire 13 can be adjusted according to the length of the deflagration driving section 1;

[0100] It should be noted that in order to straighten the ignition wire 13 between the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12, the center hole 1031 on the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12, the locking screw 500, and the rotating winding 501 sleeved on the locking screw 500 can be used to cooperate with each other to straighten the ignition wire 13 along the center line of the explosion drive section axis between the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12; specifically, the center hole 1031 on the third conductive core pole portion 103 is located at On the axis of the deflagration drive section 1, one end of the ignition wire passes through the center hole 1031 and is wound around the rotating winding 501 near the side of the blind plate 14 and is fixed. The other end of the ignition wire passes through the center hole 1031 and is wound around the rotating winding 501 near the side of the diaphragm 5 and is fixed. Loosen the locking screw 500, rotate the rotating winding 501 to tighten the ignition wire, and then tighten the locking screw 500 to fix the rotating winding 501 so that the ignition wire is in a straightened state. No matter which side of the locking screw 500 is loosened, as long as the ignition wire 13 can be kept in a straightened state, it will be fine.

[0101] Of course, the ignition wire 13 can also be straightened by using the center hole 1031 on the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12, the locking screw 500, and the elastic member 502 and the rotating winding 501 sleeved on the locking screw 500. Specifically, after the ignition wire 13 is passed through the center hole 1031 on the first rotary high-voltage electrode 11 at one end close to the blind plate 14, the rotating winding 501 on the first rotary high-voltage electrode 11 is rotated several times to put the elastic member 502 in a taut state, and then the ignition wire is wound around the end close to the blind plate 14. The first rotary high-voltage electrode 11 is fixed on the rotary winding 501; the end of the ignition wire 13 closest to the diaphragm 5 is passed through the center hole 1031 of the second rotary high-voltage electrode 12, and the rotary winding 501 on the second rotary high-voltage electrode 12 is rotated several times to tighten the elastic member 502. The end of the ignition wire closest to the diaphragm 5 is then wound around the rotary winding 501 and fixed. After the rotary winding 501 is released, the elastic force of the elastic member 502 is used to straighten the ignition wire 13 between the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12.

[0102] The axial distance between the first rotary high-voltage electrode 11 and the blind plate 14 is L1, and the axial distance between the second rotary high-voltage electrode 12 and the diaphragm 5 is L2. If the lengths of L1 and L2 are less than 0.5 cm, breakdown may occur, resulting in damage to the equipment or endangerment to personnel safety; if the lengths of L1 and L2 are greater than 20 cm, it may cause unstable combustion of the combustible mixture in the deflagration drive section 1. Therefore, limiting the lengths of L1 and L2 to 0.5 cm-20 cm not only makes the ignition wire 13 as long as possible in the axial direction of the deflagration drive section, which can further make the combustible mixture in the deflagration drive section 1 burn more fully, but also avoids the distances between the first rotary high-voltage electrode 11 and the end of the deflagration drive section and between the second rotary high-voltage electrode 12 and the diaphragm 5 being too close, thereby avoiding breakdown and ensuring the safety of equipment and personnel;

[0103] An opening 8 is provided on the deflagration driving section 1 to cooperate with the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12. The opening 8 cooperates with the first rotary high-voltage electrode 11, and the second rotary high-voltage electrode 12 cooperates with the opening 8. The first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 are conveniently inserted into the combustion driving section 1 through the opening 8. In order to ensure the airtightness between the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 and the deflagration driving section 1 respectively, the contact surface between the sealing pressure ring 400 in the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 and the deflagration driving section, and the contact surface between the sealing pressure ring 400 in the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 and the third covering portion 203 in the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 are respectively installed with a sealing ring 401;

[0104] The deflagration driving section 1 is filled with a combustible mixed gas, which may include a fuel, an oxidant and an inert gas, wherein the fuel is hydrogen, carbon monoxide or alkanes, alkenes and alkynes, or other combustible gases; the oxidant is oxygen or nitrous oxide, or other oxidizing gases; the inert gas is nitrogen, a rare gas or carbon dioxide, or other gases that do not participate in the combustion reaction; the ratio of fuel: oxidant: inert gas may be 1:1:1, the ratio of fuel: oxidant: inert gas may be 2:1:1, and the ratio of fuel: oxidant: inert gas may be 2:1:7. Of course, the ratio of fuel, oxidant and inert gas is set according to the specific equipment and experimental requirements.

[0105] The device further includes a discharge system 7, which includes a high-voltage capacitor 71, an ignition switch 720, and an unloading switch 730. The positive electrode of the high-voltage capacitor 71, the ignition switch 720, the first rotary high-voltage electrode 11, the ignition wire 13, the second rotary high-voltage electrode 12, and the negative electrode of the high-voltage capacitor 71 constitute an ignition circuit 72; the positive electrode of the high-voltage capacitor 71, the unloading switch 730, and the negative electrode of the high-voltage capacitor 71 constitute an unloading circuit 73. The ignition circuit 72 and the unloading circuit 73 are connected in parallel. The high-voltage capacitor 71 is used to store high voltage electricity and can generate a voltage of 2000V.

[0106] After the high-voltage capacitor 71 is charged, the ignition switch 720 is closed first, and the high-voltage capacitor 71 is connected to the ignition wire 13 through the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 respectively, and ignition begins; after a predetermined time, the unloading switch 730 is closed to short-circuit the positive and negative poles of the high-voltage capacitor 71, and the charge in the high-voltage capacitor 71 is instantly returned to the high-voltage capacitor 71 through the unloading circuit 73, completing the unloading. The above-mentioned predetermined time can be 5-30 milliseconds.

[0107] The working principle is as follows: There is an ignition wire 13 arranged along the axial direction X in the deflagration driving section 1. After the high-voltage capacitor 71 is charged, the ignition switch 720 is closed first. The high-voltage capacitor 71 is connected to the ignition wire 13 through the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 respectively. A high voltage of thousands to tens of thousands of volts is applied to both ends of the ignition wire 13. When the ignition switch 720 is energized, the ignition wire 13 heats up violently, igniting the combustible mixture near the ignition wire 13 within microseconds. After ignition, a columnar flame is formed and spreads radially. Expand; by making the ignition wire 13 strictly coaxial with the pipeline of the deflagration drive section 1, it is ensured that all parts along the axial direction are burned out at the same time; since the discharge process of the high-voltage capacitor 71 is longer than the combustion process, it is necessary to unload the remaining charge in the high-voltage capacitor 71 before the end of combustion. Therefore, after a predetermined time, the unloading switch 730 is closed to short-circuit the positive and negative poles of the high-voltage capacitor 71. The charge in the high-voltage capacitor 71 is instantly returned to the high-voltage capacitor 71 through the unloading circuit, completing the unloading, thereby preventing the combustion products from breaking down near the positive pole of the high-voltage capacitor 71 and causing a safety accident.

[0108] It should be noted that detonation drive requires the formation of a detonation wave that propagates axially in the deflagration drive section, while deflagration drive causes the gas in the pipeline of the deflagration drive section 1 to ignite simultaneously along the axial direction, completing combustion in a deflagration rather than detonation manner, and ending combustion simultaneously along the axial direction X.

[0109] Typically, the effective operating time of a shock tube / wind tunnel is on the order of a few milliseconds to 100 milliseconds. In order to provide precise test conditions, it is necessary to strictly ensure that the combustible mixture in the deflagration drive section is ignited and burned out at the same time.

[0110] It can be seen from the above embodiments that the coaxial cylindrical deflagration drive device for shock tubes / wind tunnels provided by the present invention achieves at least the following beneficial effects:

[0111] First, in the prior art, detonation drives a detonation wave that propagates axially within the deflagration drive section. However, since the extremely high pressure peak of the detonation wave cannot be fully utilized for driving, the effective pressure provided by the detonation drive is significantly lower than the pressure limit of the equipment. However, in the present invention, deflagration replaces detonation, eliminating the pressure peak associated with detonation. 100% of the combustion pressure can be used to compress the test gas, thereby increasing the pressure of the test gas.

[0112] Second, the mixture ratio limit of deflagration is much wider than that of detonation, and the temperature and sound speed range of the driving gas is larger. Therefore, the corresponding total temperature range of the test gas is also larger than that of detonation driving.

[0113] Third, the coordination between the center hole 1031 on the first and second rotary high-voltage electrodes 11 and 12, the locking screw 500, the elastic member 502 sleeved on the locking screw 500, and the rotating winding 501 not only ensures that an ignition wire of ten meters or even longer can be straightened between the first and second rotary high-voltage electrodes 11 and 12, but also facilitates installation of the ignition wire.

[0114] Fourth, through the center hole 1031 on the third conductive core pole portion 103 in the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode, and the center hole 1031 is coaxial with the deflagration drive section, it can ensure that the ignition wire and the deflagration drive section are precisely coaxial.

[0115] The assembly sequence for the coaxial cylindrical deflagration drive device for shock tubes / wind tunnels is as follows:

[0116] First, providing a deflagration drive section 1;

[0117] Second, first, an opening 8 for placing the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 is opened on the deflagration driving section 1; secondly, the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 are inserted into the opening 8, the first rotary high-voltage electrode 11 is located on the side of the deflagration driving section close to the blind plate 14, and the second rotary high-voltage electrode 12 is located on the side of the deflagration driving section 1 close to the driven section 2, and the threaded pressing caps 300 on the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12 are used to achieve mechanical connection with the deflagration driving section 1; the two ends of the ignition wire 13 are respectively connected to the center holes 1031 on the first rotary high-voltage electrode 11 and the second rotary high-voltage electrode 12;

[0118] Third, a diaphragm is installed between the deflagration driving section 1 and the driven section 2. The driven section 2 is connected to one end of the deflagration driving section 1 close to the diaphragm 5, and a blind plate 14 is connected to the other end.

[0119] Fourth, the deflagration driving section 1 is filled with combustible mixed gas;

[0120] Fifth, connect the discharge system 7, and use the positive electrode of the high-voltage capacitor 71, the ignition switch 720, the first rotating high-voltage electrode 11, the ignition wire 13, the second rotating high-voltage electrode 12, and the negative electrode of the high-voltage capacitor 71 to form an ignition circuit 72; use the positive electrode of the high-voltage capacitor 71, the unloading switch 730, and the negative electrode of the high-voltage capacitor 71 to form an unloading circuit 73; and connect the ignition circuit 72 and the unloading circuit 73 in parallel.

[0121] Assembling the coaxial cylindrical deflagration drive device for shock tube / wind tunnel according to the above-mentioned assembly sequence can not only better plug in the first rotating high-voltage electrode and the second rotating high-voltage electrode, making the position of the ignition wire 13 more accurately arranged, but also ensure the airtightness between the first rotating high-voltage electrode and the second rotating high-voltage electrode and the deflagration drive section, avoid leakage of combustible mixture, ensure personal safety, and facilitate operation.

[0122] Of course, without considering the discharge of the high-voltage capacitor to the ignition wire, the above assembly sequence can be adjusted appropriately. After installing the detonated drive segment 2 or the blind plate 14, the discharge system can be connected first, and then the detonation drive segment 1 can be filled with combustible mixed gas, as follows:

[0123] First, providing a deflagration drive section 1;

[0124] Second, first, an opening 8 for placing a first rotating high-voltage electrode 11 and a second rotating high-voltage electrode 12 is opened on the deflagration driving section 1; secondly, the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 are inserted into the opening 8, with the first rotating high-voltage electrode 11 being located on the side of the deflagration driving section close to the blind plate 14, and the second rotating high-voltage electrode 12 being located on the side of the deflagration driving section 1 close to the driven section 2; an ignition wire 13 extending along the axial direction X is connected between the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12;

[0125] Third, a diaphragm is installed between the deflagration driving section 1 and the driven section 2. The driven section 2 is connected to one end of the deflagration driving section 1 close to the diaphragm 5, and a blind plate 14 is connected to the other end.

[0126] Fourth, connect the discharge system 7, and connect the positive electrode of the high-voltage capacitor 71, the ignition switch 720, the first rotary high-voltage electrode 11, the ignition wire 13, the second rotary high-voltage electrode 12, and the negative electrode of the high-voltage capacitor 71 to form an ignition circuit 72; connect the positive electrode of the high-voltage capacitor 71, the unloading switch 730, and the negative electrode of the high-voltage capacitor 71 to form an unloading circuit 73; and connect the ignition circuit 72 and the unloading circuit 73 in parallel;

[0127] Fifth, the deflagration driving section 1 is filled with combustible mixed gas.

[0128] It should be noted that: first, a deflagration driving section 1 is provided; second, first, an opening 8 for placing a first rotating high-voltage electrode 11 and a second rotating high-voltage electrode 12 is opened on the deflagration driving section 1; secondly, the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12 are inserted into the opening 8, the first rotating high-voltage electrode 11 is located on the side of the deflagration driving section close to the blind plate 14, and the second rotating high-voltage electrode 12 is located on the side of the deflagration driving section 1 close to the driven section 2; an ignition wire 13 extending along the axial direction X is connected between the first rotating high-voltage electrode 11 and the second rotating high-voltage electrode 12; third, a diaphragm is installed between the deflagration driving section 1 and the driven section 2, and the driven section 2 is connected at one end of the deflagration driving section 1 close to the diaphragm 5, and the other end is connected to the blind plate 14; the assembly order of the above three steps is irreversible, that is, the above assembly order cannot be reversed, and it cannot be implemented after reversal.

[0129] Figure 15 Schematic diagram of the structure of a shock tube / wind tunnel provided by an embodiment of the present invention; another embodiment of the present invention provides a shock tube / wind tunnel, including a coaxial cylindrical deflagration drive device for a shock tube / wind tunnel provided by an embodiment of the present invention.

[0130] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A rotating high-voltage electrode for a coaxial cylindrical deflagration drive device, characterized in that: It includes a conductive core, an insulating sleeve, a threaded pressure cap, a sealing pressure ring, and a locking screw, wherein the insulating sleeve is covered on the outer surface of the conductive core, the sealing pressure ring and the threaded pressure cap are both sleeved on the outer surface of the insulating sleeve, and the conductive core covered with the insulating sleeve is plugged into the deflagration drive section and connected to the deflagration drive section through the threaded pressure cap; The conductive core has a first conductive core portion, a second conductive core portion and a third conductive core portion, one end of the second conductive core portion is connected to an end of the first conductive core portion close to the second conductive core portion, and the other end is connected to an end of the third conductive core portion close to the second conductive core portion, and the end of the first conductive core portion away from the second conductive core portion is electrically connected to a high voltage power supply; The diameters of the first conductive core portion and the third conductive core portion are both smaller than the diameter of the second conductive core portion; A central hole for passing an ignition wire is formed on a side of the third conductive core portion away from the second conductive core portion, and the central hole is coaxial with the deflagration drive section; A rotating winding is sleeved on the locking screw, and the rotating winding is located on the side of the locking screw close to the center hole, and the end of the third conductive core portion away from the second conductive core portion is connected to the locking screw; The rotating winding is provided with grooves arranged along a first direction and a circumferential direction, wherein the first direction is the direction from the third conductive core pole portion to the first conductive core pole portion; The insulating sleeve has a first covering portion matched with the first conductive core portion, a second covering portion corresponding to the second conductive core portion, and a third covering portion matched with the third conductive core portion, wherein, along the first direction, the length of the first conductive core portion is a1, the length of the third conductive core portion is a2, the length of the first covering portion is b1, and the length of the third covering portion is b2, a1>b1, a2>b2; The sealing pressure ring is located on the side of the third covering portion close to the second covering portion, the threaded pressure cap is located on the side of the first covering portion close to the second covering portion, and the second covering portion is located between the sealing pressure ring and the threaded pressure cap; The contact surface between the sealing pressure ring and the explosion driving section and the contact surface between the sealing pressure ring and the third covering portion are respectively installed with sealing rings.

2. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 1, characterized in that: A threaded hole is provided at one end of the third conductive core portion away from the second conductive core portion, and the end of the third conductive core portion away from the second conductive core portion is connected to a side of the locking screw close to the center hole through a threaded connection.

3. The rotating high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 1, characterized in that: An elastic member is also sleeved on the locking screw. The elastic member is located on a side of the locking screw away from the center hole. One end of the elastic member is fixedly connected to the rotating winding, and the other end is fixedly connected to the locking screw.

4. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 3, characterized in that: The locking screw includes a screw rod and a screw head connected to the screw rod, the rotating winding and the elastic member are sleeved on the screw rod, the other end of the elastic member is fixedly connected to the screw head, and a threaded hole is provided at one end of the third conductive core pole portion away from the second conductive core pole portion, and the screw rod and the threaded hole are connected by threads.

5. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 1, characterized in that: The diameter of the middle portion of the second conductive core portion is larger than the diameters of the two ends of the second conductive core portion, and along the first direction, the diameter of the middle portion of the second conductive core portion gradually decreases toward the two ends.

6. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 1, characterized in that: The insulating sleeve is made of radiation cross-linked polyolefin material.

7. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to claim 1, characterized in that: The diameter of the conductive core electrode is 5mm-20mm.

8. The rotary high-voltage electrode for a coaxial cylindrical deflagration drive device according to any one of claims 1 to 7, characterized in that: The shape of the groove is one or more of a teardrop shape, an oval shape, a heart shape, a triangle shape, a diamond shape, and a rectangle shape.

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