Electronically controlled solid propellant power device, contact method between grain burning surface and electrode

Abstract

The present invention relates to an electronically controlled solid propellant power system, and in particular to an electronically controlled solid propellant power device, and a method for contacting the burning surface of a grain with an electrode. The electronically controlled solid propellant power device includes a housing, in which a burning surface electrode and a conductive electrode are provided; the conductive electrode is fixed in the housing, and the burning surface electrode is connected to a corresponding adapter seat via a threaded transmission structure; a gas exhaust channel is provided on the burning surface electrode, and the gas exhaust channel can cause the burning surface electrode to rotate when the gas passes through so as to move toward the grain by means of the threaded transmission structure. The method for contacting the burning surface of a grain with an electrode comprises fixing the grain, setting the burning surface electrode at the corresponding end of the grain as a rotating electrode, so that the burning surface electrode rotates while maintaining contact with the corresponding end face of the grain; and providing a gas exhaust channel on the burning surface electrode. The present invention can solve the problems of poor gas exhaust and difficulty in calculating the burning surface area of ​​existing electronically controlled solid propellant power devices.

Description

Technical Field

[0001] The present invention relates to an electronically controlled solid propellant power system, in particular to an electronically controlled solid propellant power device, and a contact method between a burning surface of a grain and an electrode. Background Art

[0002] Electronically controlled flame-out solid propellant (ECSP) is a type of solid propellant with controlled combustion and unique electrochemical properties. The propellant can be ignited by applying a certain voltage to electrodes at both ends. After power is removed, the propellant can automatically extinguish, thereby enabling multiple ignition and extinguishing of the solid propellant. Furthermore, during the combustion process, the burning rate of the propellant can be adjusted by varying the voltage. For power systems such as solid engines, gas generators, rocket boosters, and attitude control systems that use ESP, the ESP power unit is the core device. Its operating state is primarily controlled by applying an external voltage, thereby improving the mobility and flexibility of the power system. It also has the advantages of a simple structure and precise energy control, enabling the power system to function proactively and in real time.

[0003] Existing electronically controlled solid propellant power plants generally include a shell and a nozzle connected to the shell. The shell is equipped with a grain (the full name is electronically controlled solid propellant grain) and an electrode for igniting and extinguishing the solid propellant. According to the combustion principle of electronically controlled solid propellant, the propellant must be in continuous contact with the electrode during the combustion process to continuously generate combustion gas. Since the length of the grain gradually decreases during combustion, the design must meet the requirement of continuous movement of the electronically controlled solid propellant or the electrode to ensure continuous contact. In addition, the control of the propellant burning surface is related to the entire power design, so it is required that the shape of the burning surface during combustion is regular or the burning surface area is easily calculable.

[0004] The Chinese invention patent application with publication number CN107642435A discloses an electronically controlled solid propellant rocket engine with adjustable thrust and multiple starts. Two coplanar electrodes arranged in the same plane are provided at one end of the propellant, and a spring is provided at the other end. The spring can apply a top thrust to the propellant so that the propellant always maintains contact with the coplanar electrode. During operation, the two workpiece electrodes are respectively connected to the two ends of the power supply, and a certain voltage is applied between the two coplanar electrodes. The engine can ignite. When the power is cut off, the engine automatically shuts down, and the engine can be started continuously multiple times. In addition, by changing the voltage applied between the two electrodes, active and real-time control of the engine thrust can be achieved. The coplanar electrode is provided with openings at the part in contact with the propellant, which can discharge the gas. In order to prevent a short circuit between the two electrodes, an anti-breakdown gap needs to be set between the two electrodes. With this electrode structure, the number and area of ​​openings in the coplanar electrodes affect the discharge of the gas generated by the charge. Gas between the electrode and the burning surface of the pole piece can also cause contact and separation between the charge and electrode. The high-temperature gas generated by the burning charge can also easily cause electrode ablation. Furthermore, the openings and the gap between the two electrodes affect the shape of the burning surface, resulting in irregular shapes and difficulty in calculating the burning surface area, making it difficult to achieve a good power design.

[0005] A Chinese invention patent with authorization publication number CN110714855B discloses an electronically controlled power device with real-time thrust control and repeatable ignition and extinguishing capabilities. The device's electrodes are divided into a combustion surface electrode and a sliding electrode. As a prior art technique, by selecting the electrode materials for the two electrodes, combustion can occur at the contact surface between the charge and the fuel electrode, while combustion does not occur at the contact surface between the charge and the conductive electrode. A spring is provided on the side of the sliding electrode facing away from the charge. The spring's elastic force actively pushes the sliding electrode against the charge in real time, ensuring close contact between the charge and the combustion surface electrode at all times. To facilitate gas discharge, the contact area of ​​the combustion surface electrode with the charge is porous, with openings used to facilitate gas discharge. While this electronically controlled power device places electrodes at both ends of the charge, preventing the electrode gap from affecting the shape of the charge's combustion surface, it still cannot prevent the obstruction of gas discharge by the openings in the electrodes, nor can it prevent the influence of the openings on the shape of the charge's combustion surface. This also presents problems such as poor gas discharge and difficulty calculating the combustion surface area. Summary of the Invention

[0006] One object of the present invention is to provide an electronically controlled solid propellant power plant to address the problems of poor gas discharge and difficulty calculating the burning surface area in existing electronically controlled solid propellant power plants. Another object of the present invention is to provide a method for contacting the burning surface of a grain with an electrode to address the problems of poor gas discharge and difficulty calculating the burning surface area in existing methods for contacting the burning surface of a grain with an electrode.

[0007] The electronically controlled solid propellant power unit of the present invention adopts the following technical solutions:

[0008] An electronically controlled solid propellant power device includes a shell, a charge installation cavity for installing a charge, and a burning surface electrode and a conductive electrode for being arranged at both axial ends of the charge, the burning surface electrode being used to ignite the combustion end of the charge; the charge is fixed in the shell, and the burning surface electrode is connected to a corresponding adapter seat by a threaded transmission structure; the burning surface electrode is provided with a gas exhaust channel for the gas generated by the charge to pass through, and the air inlet of the gas exhaust channel is arranged at one end of the burning surface electrode for contacting the charge, so that the burning surface electrode can rotate when the gas passes through so as to move toward the charge by relying on the threaded transmission structure.

[0009] The beneficial effect of the above technical solution is that, since the charge is fixed, by connecting the burning surface electrode to the corresponding adapter seat through a threaded transmission structure, the burning surface electrode can be rotated relative to the charge when the gas passes through the gas exhaust channel to move toward the charge by relying on the threaded transmission structure, so that the burning surface electrode forms a rotating electrode, and the air inlet of the gas exhaust channel will not form a part on the charge that cannot contact the electrode. Therefore, the air inlet of the gas exhaust channel can be set larger, thereby ensuring smooth discharge of gas during combustion; and, due to the rotation of the rotating electrode, the burning surface of the charge that is in contact with the burning surface electrode can burn evenly, thereby keeping the shape of the burning surface regular and the area of ​​the burning surface measurable, which is conducive to achieving good power design functions.

[0010] As a further limited technical solution: the gas outlet of the gas exhaust channel is arranged on the side of the burning surface electrode facing away from the charge.

[0011] The beneficial effect of the above-mentioned further limited technical solution is that it is more conducive to the smooth discharge of gas.

[0012] As a further limited technical solution: the diameter of the conductive electrode and / or the burning surface electrode is greater than or equal to the diameter of the charge.

[0013] The beneficial effect of the above-mentioned further limited technical solution is that it can ensure the complete combustion of the propellant column and is more conducive to the calculation of the burning surface area.

[0014] As a further limited technical solution: the diameter of the burning surface electrode is larger than the diameter of the charge, and one end of the air inlet close to the outer peripheral surface of the burning surface electrode is exposed outside the outer peripheral surface of the charge.

[0015] The beneficial effect of the above-mentioned further limited technical solution is that the part of the air inlet exposed on the outside of the charge can form a larger gas exhaust port, so that the gas can be discharged more smoothly and the area of ​​the gas's rotational driving effect on the combustion surface electrode can be increased.

[0016] As a further limited technical solution: the adapter seat is a screw with an external thread, and the center of the burning surface electrode is provided with a threaded hole adapted to the screw, and the threaded hole and the external thread on the screw form the threaded transmission structure; a screw through hole is provided in the propellant column for the screw to pass through, and there is a gap between the inner wall of the screw through hole and the screw.

[0017] The beneficial effect of the above-mentioned further defined technical solution is that it facilitates the assembly of the burning surface electrode.

[0018] As a further limited technical solution: an insulating bushing is provided in the screw hole, which is used to isolate the screw from the inner wall of the screw hole and can be burned when the charge burns.

[0019] The beneficial effect of the above-mentioned further limited technical solution is that it can better avoid direct contact between the screw and the charge, thereby realizing a single current path designed for the power device, which is formed by the positive electrode of the power supply-conductive electrode-charge-burning surface electrode-screw-negative electrode of the power supply.

[0020] As a further limited technical solution: the end of the screw away from the burning surface electrode passes through the powder column, and the passing end is fixed on an insulating seat provided on the conductive electrode.

[0021] The beneficial effect of the technical solution further defined above is that the screw is insulated from the conductive electrode, and at the same time, the screw is easily fixed without the need for an additional screw fixing seat, resulting in a compact structure.

[0022] The contact method between the burning surface of the Chinese medicine column and the electrode of the present invention adopts the following technical solution:

[0023] A method for contacting the burning surface of a charge and an electrode, wherein the charge is fixed and the burning surface electrode at the corresponding end of the charge is set as a rotating electrode, so that the burning surface electrode rotates while maintaining contact with the corresponding end surface of the charge; a gas exhaust channel is set on the burning surface electrode for the gas generated by the charge to pass through, and the air inlet of the gas exhaust channel is set at one end of the burning surface electrode for contacting the charge.

[0024] The beneficial effect of the above technical solution is that by fixing the charge and setting the burning surface electrode as a rotating electrode, the burning surface electrode contacts the burning surface electrode in a rotating manner during operation, and the air inlet of the gas exhaust channel will not form a part on the charge that cannot contact the electrode. Therefore, the air inlet of the gas exhaust channel can be set larger, thereby ensuring smooth discharge of gas during combustion; and, due to the rotation of the rotating electrode, the burning surface of the charge that is in contact with the burning surface electrode can burn evenly, thereby keeping the shape of the burning surface regular and the burning surface area measurable, which is conducive to achieving good power design functions.

[0025] As a further limited technical solution: the burning surface electrode is connected to the corresponding adapter seat through a threaded transmission structure, and the gas exhaust channel can cause the burning surface electrode to rotate when the gas passes through and move toward the charge by relying on the threaded transmission structure.

[0026] The beneficial effect of the technical solution further defined above is that the combustion surface electrode can be rotated by utilizing the gas exhaust channel and the gas on the combustion surface electrode without the need for an additional drive structure. The structure is simple and compact, and it is convenient to move the combustion surface electrode toward the charge, thereby achieving continuous contact with the combustion surface, thereby achieving continuous combustion of the electronically controlled propellant and continuous operation of the power device.

[0027] As a further limited technical solution: the gas outlet of the gas exhaust channel is arranged on the side of the burning surface electrode facing away from the charge.

[0028] The beneficial effect of the above-mentioned further limited technical solution is that it is more conducive to the smooth discharge of gas.

[0029] As a further limited technical solution: the diameter of the conductive electrode and / or the burning surface electrode is greater than or equal to the diameter of the charge.

[0030] The beneficial effect of the above-mentioned further limited technical solution is that it can ensure the complete combustion of the propellant column and is more conducive to the calculation of the burning surface area.

[0031] As a further limited technical solution: the diameter of the burning surface electrode is larger than the diameter of the charge, and one end of the air inlet close to the outer peripheral surface of the burning surface electrode is exposed outside the outer peripheral surface of the charge.

[0032] The beneficial effect of the above-mentioned further limited technical solution is that the part of the air inlet exposed on the outside of the charge can form a larger gas exhaust port, so that the gas can be discharged more smoothly and the area of ​​the gas's rotational driving effect on the combustion surface electrode can be increased.

[0033] As a further limited technical solution: the adapter seat is a screw with an external thread, and the center of the burning surface electrode is provided with a threaded hole adapted to the screw, and the threaded hole and the external thread on the screw form the threaded transmission structure; a screw through hole is provided in the propellant column for the screw to pass through, and there is a gap between the inner wall of the screw through hole and the screw.

[0034] The beneficial effect of the above-mentioned further defined technical solution is that it facilitates the assembly of the burning surface electrode.

[0035] As a further limited technical solution: an insulating bushing is provided in the screw hole, which is used to isolate the screw from the inner wall of the screw hole and can be burned when the charge burns.

[0036] The beneficial effect of the above-mentioned further limited technical solution is that it can better avoid direct contact between the screw and the charge, thereby realizing a single current path designed for the power device, which is formed by the positive electrode of the power supply-conductive electrode-charge-burning surface electrode-screw-negative electrode of the power supply.

[0037] As a further limited technical solution: the end of the screw away from the burning surface electrode passes through the powder column, and the passing end is fixed on an insulating seat provided on the conductive electrode.

[0038] The beneficial effect of the technical solution further defined above is that the screw is insulated from the conductive electrode, and at the same time, the screw is easily fixed without the need for an additional screw fixing seat, resulting in a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the arrangement relationship between the grain and the electrodes in Example 1 of the electronically controlled solid propellant power device of the present invention;

[0040] Figure 2 yes Figure 1 AA section view;

[0041] Figure 3 yes Figure 1 A three-dimensional diagram after removing the shell;

[0042] Figure 4 yes Figure 3 Stereoscopic image after removing the grain column;

[0043] Figure 5 It is a three-dimensional picture of the medicine column;

[0044] Figure 6 It is a structural diagram of the burning surface electrode.

[0045] The names of the components corresponding to the corresponding reference numerals in the figure are: 1. Shell; 10. Propellant; 11. Screw through hole; 12. Insulating bushing; 13. Positioning groove; 20. Conductive electrode; 22. Positioning boss; 30. Burning surface electrode; 31. Threaded through hole; 32. Gas exhaust channel; 33. Air inlet; 34. Exposed end; 35. Air outlet; 40. Screw; 41. Shoulder; 50. Electrode fixing seat; 51. Electrode pressure plate; 52. Insulating seat; 53. Threaded blind hole; 61. First terminal; 62. Second terminal. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0048] It should be noted that, in the specific embodiments of the present invention, terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the phrase "including a ..." or other defined elements that may appear does not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0049] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In the description of the present invention, unless otherwise expressly specified or limited, the terms "provided with" and "provided with" should be understood broadly. For example, the object "provided with" may be a part of the main body, or may be arranged separately from the main body and connected to the main body. The connection may be detachable or non-detachable. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] The present invention is described in further detail below with reference to the examples.

[0052] Example 1 of the electronically controlled solid propellant power device of the present invention:

[0053] The electronically controlled solid propellant power unit includes a housing 1, one end of which is provided with an electrode holder 50, and the other end is provided with a nozzle. A charge mounting cavity is provided within the housing 1 for mounting a cylindrical charge 10. In order to achieve insulation, an insulating material is sprayed on the inner wall of the charge mounting cavity. A cylindrical burning surface electrode 30 and a conductive electrode 20 are also provided within the housing 1. Figure 1 and Figure 2 The burning surface electrode 30 and the conductive electrode 20 are respectively arranged at the axial ends of the charge 10. The burning surface electrode 30 is arranged corresponding to the burning surface of the charge 10 and is used to ignite the burning end of the charge 10. The conductive electrode 20 is a fixed electrode fixed to the shell 1, which is used to make conductive contact with the corresponding end of the charge 10 and provide support for the charge 10. Specifically, an electrode mounting groove is provided on the electrode fixing seat 50, and the conductive electrode 20 is embedded in the electrode mounting groove and is pressed and fixed by an annular electrode pressing plate 51. The electrode pressing plate 51 is fixed to the electrode fixing seat 50 by four screws. Figure 2 、 Figure 3 and Figure 4 The conductive electrode 20 is provided with two positioning bosses 22 on the end surface facing the medicine column 10; Figure 5 Two positioning grooves 13 are provided on the corresponding end faces of the drug column 10, which are adapted to the positioning bosses 22, for achieving circumferential positioning of the drug column 10. The drug column 10 and the conductive electrode 20 can be fixed by bonding.

[0054] The assembly structure of the burning surface electrode 30, the charge column 10 and the conductive electrode 20 is as follows Figure 1 As shown. An insulating seat 52 is fixed at the center of the conductive electrode 20, and a threaded blind hole 53 is provided on the insulating seat 52. Figure 1 and Figure 2 , the threaded blind hole 53 is fixed to the matching screw 40 through a threaded connection. A screw through-hole 11 is provided at the center of the medicine column 10, and the screw 40 passes through the screw through-hole 11 of the medicine column 10. The inner diameter of the screw through-hole 11 is larger than the diameter of the screw 40, and a gap is formed between the screw 40 to prevent the medicine column 10 from contacting the screw 40 and affecting the current path of the medicine column 10. An insulating bushing 12 is also provided in the screw through-hole 11, and the insulating bushing 12 is used to isolate the screw 40 from the inner wall of the screw through-hole 11 to achieve a more reliable insulation effect. Figure 3The center of the burning surface electrode 30 is provided with a threaded through hole 31 for forming a threaded transmission structure with the screw 40. The screw 40 forms an adapter for fixing the burning surface electrode 30. The end of the screw 40 away from the conductive electrode 20 is provided with a shoulder 41. The shoulder 41 forms a stop structure for axially limiting the burning surface electrode 30, which can prevent the burning surface electrode 30 from falling off. A first terminal 61 is connected to the end face of the screw away from the burning surface electrode 30. The axis of the insulating seat 52 is provided with an extraction hole for the wire connected to the first terminal 61 to be led out. The conductive electrode 20 is connected to the second terminal 62. The insulating seat 52 is provided with a radial through hole connected to the extraction hole at its axis, so that the wire connected to the second terminal 62 can be led out from the axis of the insulating seat 52.

[0055] Since the screw 40 and the conductive electrode 20 are fixedly mounted on the housing 1, if the combustion electrode 30 rotates, the screw 40 will be displaced axially by the threaded transmission structure. In order to allow the gas generated by the charge 10 to pass through and be discharged from the housing 1, the combustion electrode 30 is provided with a gas discharge channel 32, such as Figure 6 The gas discharge channel 32 forms an air inlet 33 on the side of the burning surface electrode 30 that contacts the charge 10, and forms a gas outlet 35 on the side of the burning surface electrode 30 that faces away from the charge 10. The overall channel is an inclined channel in the form of fan blades, so that the burning surface electrode 30 forms an impeller. When the gas passes through, the burning surface electrode 30 can rotate. In combination with the rotation direction of the thread, the burning surface electrode 30 can move toward the charge 10 by relying on the thread transmission structure.

[0056] like Figure 1 、 Figure 2 and Figure 3 The diameters of the conductive electrode 20 and the burning electrode 30 are both larger than the diameter of the charge 10, and a portion of their end surfaces are exposed radially outward from the charge 10, forming an annular enclosed space between the outer circumference of the charge 10, the shell 1, the conductive electrode 20, and the burning electrode 30. The gas inlet 33 of the gas discharge passage 32 is rectangular and extends radially along the burning electrode 30. One end of the gas inlet 33 is adjacent to the axis of the burning electrode 30, while the other end is adjacent to the outer circumference of the burning electrode 30. The end closest to the outer circumference of the burning electrode 30 is an exposed end 34, which is exposed outside the charge 10. This exposed end 34 allows the gas within the annular enclosed space to be discharged, ensuring stable fuel gas driving the burning electrode 30.

[0057] During assembly, first install the burning surface electrode 30 onto the screw 40, starting from the head of the screw 40 and continuing to install it to the shoulder 41 in the form of a threaded fit. Then, the charge 10 is sleeved onto the screw 40 through the screw through-hole 11, and the lower end face of the charge 10 contacts the burning surface electrode 30. Finally, connect the screw 40 to the threaded blind hole 53 on the insulating seat 52, so that the conductive electrode 20 contacts the upper end face of the charge 10.

[0058] During operation, a voltage is applied between terminals 61 and 62. This voltage is applied between the conductive electrodes 20 and the burning surface electrode 30 at the axial ends of the grain 10 via a wire and a conductive screw 40, generating a current. The end surface of the grain 10 that contacts the burning surface electrode 30 (i.e., the burning surface) begins to burn, generating initial combustion gases, which are then discharged through the fan-shaped gas discharge channel 32 on the burning surface electrode 30. The gas flowing through the gas discharge channel 32 exerts a force on the burning surface electrode 32, causing the burning surface electrode 30 to rotate about the screw 40. Due to the threaded connection between the burning surface electrode 30 and the screw 40, the burning surface electrode 30 simultaneously moves upward during rotation, thereby maintaining continuous contact between the burning surface electrode 30 and the grain 10. The present invention rotates the burning surface electrode 30 during operation of the electronically controlled solid propellant power unit, ensuring uniform combustion of the burning surface of the grain 10 that contacts the burning surface electrode 30. This maintains a regular shape and a calculable burning surface area, facilitating optimal power design. Furthermore, because the combustion electrode 30 rotates during operation, the gas inlet 33 of the gas discharge passage 32 does not create a portion of the charge 10 that is unable to contact the electrode. Therefore, it can be larger, thus ensuring smooth gas discharge during combustion. The insulating bushing 12 within the screw hole 11 can be ablated during the combustion of the charge 10 without affecting the movement of the combustion electrode 30.

[0059] Example 2 of the electronically controlled solid propellant power device of the present invention:

[0060] This embodiment differs from Example 1 in that, in Example 1, the adapter to which the combustion surface electrode 30 is connected via a threaded transmission structure is a screw 40. In this embodiment, however, the combustion surface electrode 30 has external threads on its outer circumference, and an electrode assembly seat, to which the combustion surface electrode 30 is threadedly connected, is provided on the inner wall of the housing 1. The electrode assembly seat also has internal threads, forming an adapter seat that facilitates both threaded transmission and electrical conduction. Because electrical conduction through the housing 1 is prohibited, an insulating structure is provided between the electrode assembly seat provided on the inner wall of the housing 1 and the housing 1.

[0061] Example 3 of the electronically controlled solid propellant power device of the present invention:

[0062] This embodiment differs from Embodiment 1 in that, in Embodiment 1, the gas outlet 35 of the gas discharge channel 32 is disposed on the side of the burning surface electrode 30 facing away from the charge 10. In this embodiment, the gas outlet 35 of the gas discharge channel 32 is disposed on the outer circumferential surface of the burning surface electrode 30, and a gas discharge space is provided radially outward of the burning surface electrode 30 for the gas to be discharged toward the nozzle.

[0063] Example 4 of the electronically controlled solid propellant power device of the present invention:

[0064] The difference between this embodiment and embodiment 1 is that in embodiment 1, the diameter of the burning surface electrode 30 is larger than the diameter of the charge 10, and the end of the air inlet 33 close to the outer peripheral surface of the burning surface electrode 30 is exposed outside the charge 10. In this embodiment, the diameter of the burning surface electrode 30 is equal to the diameter of the charge 10, and the air inlet 33 is completely covered by the charge 10.

[0065] Example 5 of the electronically controlled solid propellant power device of the present invention:

[0066] The difference between this embodiment and embodiment 1 is that in embodiment 1, the screw 40 is fixed by the connection between its upper end and the insulating seat 52. In this embodiment, a screw seat is provided below the burning surface electrode 30 in the housing 1, and the lower end of the screw 40 is fixed to the screw seat.

[0067] Example 1 of the contact method between the burning surface of a Chinese medicine column and an electrode of the present invention:

[0068] The contact method between the burning surface of the grain and the electrode in this embodiment is achieved by relying on the above-mentioned electronically controlled solid propellant power device, wherein the burning surface electrode 30 is configured as a rotating electrode through a threaded transmission connection with the screw 40, and a gas exhaust channel 32 is provided on the burning surface electrode 30 for the gas generated by the grain 10 to pass through. The gas exhaust channel 32 is an inclined channel, and an air inlet 33 is formed on the side of the burning surface electrode 30 for contacting the grain 10. When the gas passes through, the gas exhaust channel 32 causes the burning surface electrode 30 to rotate, and at the same time, the burning surface electrode 30 can rely on the threaded transmission structure to move toward the grain 10.

[0069] Example 2 of the contact method between the burning surface of the Chinese medicine column and the electrode of the present invention:

[0070] This embodiment differs from Embodiment 1 in that, in Embodiment 1, the burning surface electrode 30 is rotated and moved by a screw 40. In this embodiment, the burning surface electrode 30 is fixed to a rotating shaft, which is rotated by a driving mechanism. Furthermore, a spring is provided at the end of the burning surface electrode 30 facing away from the charge 10 to maintain contact between the burning surface electrode 30 and the charge 10.

[0071] Example 3 of the contact method between the burning surface of the Chinese medicine column and the electrode of the present invention:

[0072] This embodiment differs from Embodiment 1 in that, in Embodiment 1, the adapter seat connected to the burning surface electrode 30 via a threaded transmission structure is a screw 40. In this embodiment, however, an external thread is provided on the outer circumference of the burning surface electrode 30, and an electrode assembly seat for threaded connection of the burning surface electrode 30 is provided on the inner wall of the housing 1. The electrode assembly seat is provided with an internal thread, and the electrode assembly seat forms the adapter seat.

[0073] Example 4 of the contact method between the burning surface of the Chinese medicine column and the electrode of the present invention:

[0074] This embodiment differs from Embodiment 1 in that, in Embodiment 1, the gas outlet 35 of the gas discharge channel 32 is disposed on the side of the burning electrode 30 facing away from the charge 10. In this embodiment, however, the gas outlet 35 of the gas discharge channel 32 is disposed on the outer peripheral surface of the burning electrode 30, and a gas discharge space is provided radially outward of the burning electrode 30 for the gas to be discharged toward the nozzle.

[0075] Example 5 of the contact method between the burning surface of the Chinese medicine column and the electrode of the present invention:

[0076] The difference between this embodiment and embodiment 1 is that, in embodiment 1, the diameter of the burning surface electrode 30 is larger than the diameter of the charge 10, and the end of the air inlet 33 adjacent to the outer circumference of the burning surface electrode 30 is exposed outside the charge 10. In this embodiment, the diameter of the burning surface electrode 30 is set to be equal to the diameter of the charge 10, and the air inlet 33 is completely covered by the charge 10.

[0077] Example 6 of the contact method between the burning surface of the Chinese medicine column and the electrode of the present invention:

[0078] The difference between this embodiment and embodiment 1 is that in embodiment 1, the screw 40 is fixed by the connection between its upper end and the insulating seat 52. In this embodiment, a screw seat is provided below the burning surface electrode 30 in the housing 1, and the lower end of the screw 40 is fixed to the screw seat.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An electronically controlled solid propellant power unit, comprising a housing (1), wherein a charge installation cavity for installing a charge (10) is provided in the housing (1), and further provided with a burning surface electrode (30) and a conductive electrode (20) for being arranged at both axial ends of the charge (10), wherein the burning surface electrode (30) is used to ignite the combustion end of the charge (10); characterized in that: The conductive electrode (20) is fixed in the housing (1), and the burning surface electrode (30) is connected to the corresponding adapter seat through a threaded transmission structure; the burning surface electrode (30) is provided with a gas discharge channel (32) for the gas generated by the charge (10) to pass through, and the gas inlet (33) of the gas discharge channel (32) is arranged at one end of the burning surface electrode (30) for contacting the charge (10), so that the burning surface electrode (30) can be rotated when the gas passes through so as to move toward the charge (10) by relying on the threaded transmission structure.

2. The electronically controlled solid propellant power unit according to claim 1, characterized in that: The gas outlet (35) of the gas discharge channel (32) is arranged on a side of the burning surface electrode (30) facing away from the charge (10).

3. The electronically controlled solid propellant power device according to claim 1 or 2, characterized in that: The diameter of the conductive electrode (20) and / or the burning surface electrode (30) is greater than or equal to the diameter of the drug column (10).

4. The electronically controlled solid propellant power unit according to claim 3, characterized in that: The diameter of the burning surface electrode (30) is larger than the diameter of the powder column (10), and one end of the air inlet (33) close to the outer peripheral surface of the burning surface electrode (30) is exposed outside the outer peripheral surface of the powder column (10).

5. The electronically controlled solid propellant power unit according to claim 1 or 2, characterized in that: The adapter seat is a screw (40) with an external thread, and a threaded hole adapted to the screw (40) is provided at the center of the burning surface electrode (30), and the threaded hole and the external thread on the screw (40) form the threaded transmission structure; a screw through hole (11) for the screw (40) to penetrate is provided in the powder column (10), and there is a gap between the inner wall of the screw through hole (11) and the screw (40).

6. The electronically controlled solid propellant power unit according to claim 5, characterized in that: An insulating bushing (12) is provided in the screw through hole (11). The insulating bushing (12) is used to isolate the screw (40) from the inner wall of the screw through hole (11) and can be burned when the charge (10) burns.

7. The electronically controlled solid propellant power unit according to claim 5, characterized in that: One end of the screw (40) away from the burning surface electrode (30) passes through the powder column (10), and the passing end is fixed on an insulating seat (52) provided on the conductive electrode (20).

8. A method for contacting the burning surface of a grain with an electrode in an electronically controlled solid propellant power plant, characterized in that: The method fixes a charge (10), sets a burning surface electrode (30) at a corresponding end of the charge (10) as a rotating electrode, so that the burning surface electrode (30) rotates while maintaining contact with the corresponding end face of the charge (10); a gas discharge channel (32) for the gas generated by the charge (10) to pass through is set on the burning surface electrode (30), and an air inlet (33) of the gas discharge channel (32) is set at one end of the burning surface electrode (30) for contacting the charge (10); the burning surface electrode (30) is connected to a corresponding adapter seat through a threaded transmission structure, and the gas discharge channel (32) can cause the burning surface electrode (30) to rotate when the gas passes through and move toward the charge (10) by relying on the threaded transmission structure.

9. The method for contacting the burning surface of a charge with an electrode according to claim 8, characterized in that: The gas outlet (35) of the gas discharge channel (32) is arranged on a side of the burning surface electrode (30) facing away from the charge (10).

10. The method for contacting the burning surface of a charge with an electrode according to claim 8 or 9, characterized in that: The diameter of the burning surface electrode (30) is greater than or equal to the diameter of the drug column (10).

11. The method for contacting the burning surface of a charge with an electrode according to claim 10, characterized in that: The diameter of the burning surface electrode (30) is larger than the diameter of the powder column (10), and one end of the air inlet (33) close to the outer peripheral surface of the burning surface electrode (30) is exposed outside the outer peripheral surface of the powder column (10).

12. The method for contacting the burning surface of a charge with an electrode according to claim 8 or 9, characterized in that: The adapter seat is a screw (40) with an external thread, and a threaded hole adapted to the screw (40) is provided at the center of the burning surface electrode (30), and the threaded hole and the external thread on the screw (40) form the threaded transmission structure; a screw through hole (11) for the screw (40) to penetrate is provided in the powder column (10), and there is a gap between the inner wall of the screw through hole (11) and the screw (40).

13. The method for contacting the burning surface of a charge with an electrode according to claim 12, characterized in that: An insulating bushing (12) is provided in the screw through hole (11). The insulating bushing (12) is used to isolate the screw (40) from the inner wall of the screw through hole (11) and can be burned when the charge (10) burns.

14. The method for contacting the burning surface of a charge with an electrode according to claim 12, wherein: One end (40) of the screw rod away from the burning surface electrode (30) passes through the powder column (10), and the passing end is fixed on an insulating seat (52) provided on the conductive electrode (20).

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