Motor-adjusted self-striking nozzles

Abstract

The present invention provides a motor-regulated self-strike nozzle, which relates to the technical field of liquid rocket engines and includes: an outer sleeve, a movable plunger, a central pintle and a motor component; by installing the movable plunger in a liquid collecting chamber inside the outer sleeve, a first liquid outlet channel is formed between the outer wall of the movable plunger and the hole wall of the central hole at the bottom of the outer sleeve; the central pintle is installed in the through cavity of the movable plunger; a second liquid outlet channel is formed between the flow-blocking end surface at the bottom of the central pintle and the bottom surface of the movable plunger; propellants sprayed from the first liquid outlet channel and the second liquid outlet channel collide with each other, so that the liquid propellant is better atomized; and when the flow rate of the liquid propellant changes, the motor component can drive the movable plunger to move in the liquid collecting chamber, realize active adjustment of the first liquid outlet channel and the second liquid outlet channel, ensure good atomization performance, and alleviate the technical problem in the prior art that the existing self-strike nozzle cannot change the flow channel area of ​​the nozzle, thereby affecting the atomization ability.

Description

Technical Field

[0001] The invention relates to the technical field of liquid rocket engines, in particular to a motor-regulated self-strike nozzle. Background Art

[0002] The atomization and mixing of propellant components in liquid rocket engines is accomplished by one or more nozzles comprising the injector. Each nozzle delivers a specific flow rate of propellant into the combustion chamber, achieving atomization and mixing. Based on their structural design, nozzles can generally be categorized as direct current, centrifugal, and direct current-centrifugal combinations. Different nozzle structures are suitable for different propellant types and power cycle configurations, significantly impacting engine performance, such as combustion stability, combustion efficiency, and thrust chamber cooling. Compared to direct current nozzles, centrifugal nozzles, under the action of centrifugal force, typically produce a larger spray cone angle, which accelerates the atomization and evaporation processes. Furthermore, with proper nozzle placement, adjacent spray cones are more likely to collide and mix, effectively improving combustion efficiency and shortening combustion lag. However, centrifugal nozzles are complex, large, and have low flow density, requiring a large head area for nozzle arrangement. To reduce the size of the combustion chamber head structure, shorten the jet distance, and enhance atomization and mixing, direct current nozzles can be used to cause different streams to collide with each other. Direct current nozzles that deliver a single propellant in this manner are called self-impinging nozzles.

[0003] For liquid rocket engines with variable thrust requirements, it is often necessary to adjust the engine thrust by changing the propellant supply flow rate.

[0004] However, after the existing self-impact nozzles are designed and processed, the flow area and flow coefficient of the nozzles can no longer be adjusted by changing the internal structure dimensions of the nozzles. This means that when the nozzle flow rate decreases, the pressure drop at the nozzle outlet will also be greatly reduced, causing the nozzle's atomization ability to deteriorate sharply, reducing the combustion efficiency of the combustion chamber, and even causing severe conditions such as flameout. Summary of the Invention

[0005] The purpose of the present invention is to provide a motor-regulated self-impact nozzle to alleviate the technical problem in the prior art that the existing self-impact nozzle cannot change the flow channel area of ​​the nozzle, thereby affecting the atomization ability.

[0006] In a first aspect, the present invention provides a motor-regulated self-strike nozzle comprising: an outer sleeve, a movable plunger, a central pintle, and a motor component;

[0007] A liquid collecting chamber is formed inside the outer sleeve, the movable plunger is disposed in the liquid collecting chamber, the bottom of the outer sleeve has a central hole, a first liquid outlet channel for vertically ejecting the propellant is formed between the outer wall of the movable plunger and the hole wall of the central hole, and the liquid collecting chamber is in communication with the first liquid outlet channel;

[0008] The movable plunger has a through cavity in the middle, the central pintle is disposed in the through cavity, the bottom of the central pintle has a flow-blocking end surface located below the bottom of the movable plunger, a second liquid outlet channel for laterally ejecting the propellant is formed between the flow-blocking end surface and the movable plunger, and the liquid collecting chamber is in communication with the second liquid outlet channel;

[0009] The motor component is in transmission connection with the movable plunger, and the motor component is configured to drive the movable plunger to move in the liquid collecting chamber to simultaneously adjust the liquid outlet widths of the first liquid outlet channel and the second liquid outlet channel.

[0010] In an alternative embodiment,

[0011] The motor-regulated self-strike nozzle further includes a head cover component;

[0012] The head cover component is covered on the outer sleeve, the head cover component is connected to the central pintle, and one end of the movable plunger passes through the head cover component and is connected to the motor component.

[0013] In an alternative embodiment,

[0014] Along the radial direction of the outer sleeve, the side wall of the outer sleeve has a plurality of first radial through holes, and the liquid propellant enters the liquid collecting chamber through the plurality of radial through holes;

[0015] The inner wall of the outer sleeve has a connecting thread section, and the head cover component is connected to the connecting thread section;

[0016] The bottom of the outer sleeve extends outward to form a connecting edge, and a fixing hole for connecting with the combustion chamber is provided on the connecting edge.

[0017] In an alternative embodiment,

[0018] Along the radial direction of the movable plunger, the side wall of the movable plunger has a plurality of second radial through holes, and the liquid collecting chamber is connected with the through cavity through the plurality of second radial through holes;

[0019] The top of the movable plunger is provided with a head rib, the head rib is provided with a rib through-hole, and the head rib is connected to the motor component through the rib through-hole;

[0020] The outer wall of the movable plunger has a first annular groove, and the first annular groove is used for installing a first O-ring.

[0021] In an alternative embodiment,

[0022] The motor-regulated self-strike nozzle further includes a fixing nut;

[0023] The fixing nut is located on the top of the head cover component, and the fixing nut is connected to the top of the central pintle.

[0024] In an alternative embodiment,

[0025] The top of the central pintle has a pintle thread section, and the pintle thread section is connected to the fixing nut;

[0026] Along the radial direction of the central pintle, the side wall of the central pintle has a plurality of third radial through holes, and the bottom of the central pintle has an inter-grid plate flow channel. The propellant in the liquid collecting chamber enters the second liquid outlet channel along the second radial through holes, the third radial through holes and the inter-grid plate flow channel.

[0027] In an alternative embodiment,

[0028] The outer wall of the head cover component has a head cover thread section, and the head cover thread section is connected to the connecting thread section;

[0029] The outer wall of the head cover component has a second annular groove, and the second annular groove is used to install a second O-ring;

[0030] The top of the head cover component is provided with a motor threaded hole, and the head cover component is connected to the motor component through the motor threaded hole.

[0031] In an alternative embodiment,

[0032] The head cover component has a central through hole in the middle, and the top of the central pintle passes through the central through hole and is connected to the fixing nut;

[0033] The top of the head cover component is provided with a square through hole, and the head rib passes through the square through hole and is connected with the motor component.

[0034] In an alternative embodiment,

[0035] The motor component includes a driving motor and a motor fixing bracket;

[0036] The driving motor is fixed on the motor fixing frame, and the motor fixing frame is connected to the head cover component.

[0037] In an alternative embodiment,

[0038] The motor fixing frame comprises an upper plate and a lower plate connected to each other, and a driving through hole is formed in the middle of the upper plate for the driving end of the driving motor to extend into;

[0039] The upper plate is provided with a motor mounting hole for fixing the drive motor;

[0040] The lower plate is provided with a head cover connecting hole for connecting the head cover component.

[0041] The motor-regulated self-strike nozzle provided by the present invention includes: an outer sleeve, a movable plunger, a central pintle and a motor component; by installing the movable plunger in the liquid collecting chamber inside the outer sleeve, a first liquid outlet channel is formed in the gap between the outer wall of the movable plunger and the hole wall of the central hole at the bottom of the outer sleeve, and the central pintle is installed in the through cavity of the movable plunger, and a second liquid outlet channel is formed between the flow-blocking end surface at the bottom of the central pintle and the bottom surface of the movable plunger. The propellants sprayed from the first liquid outlet channel and the second liquid outlet channel collide with each other, so that the liquid propellant is better atomized, and when the flow rate of the liquid propellant changes, the motor component can drive the movable plunger to move in the liquid collecting chamber, realize active adjustment of the first liquid outlet channel and the second liquid outlet channel, ensure good atomization performance, and alleviate the technical problem in the prior art that the existing self-strike nozzle cannot change the flow channel area of ​​the nozzle, thereby affecting the atomization ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A cross-sectional view of the overall structure of a motor-regulated self-strike nozzle provided in an embodiment of the present invention;

[0044] Figure 2 A structural cross-sectional view of the inner and outer sleeves of a motor-regulated self-striking nozzle provided in an embodiment of the present invention;

[0045] Figure 3 A schematic structural diagram of the outer sleeve of the motor-regulated self-striking nozzle provided in an embodiment of the present invention;

[0046] Figure 4 A cross-sectional view of the structure of a movable plunger in a motor-regulated self-strike nozzle provided in an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of the structure of a movable plunger in a motor-regulated self-strike nozzle provided in an embodiment of the present invention;

[0048] Figure 6 A schematic structural diagram of a central pintle in a motor-regulated self-striking nozzle provided in an embodiment of the present invention;

[0049] Figure 7 A cross-sectional view of the structure of a head cover component in a motor-regulated self-striking nozzle provided in an embodiment of the present invention;

[0050] Figure 8 A schematic structural diagram of a head cover component in a motor-regulated self-striking nozzle provided in an embodiment of the present invention;

[0051] Figure 9 A schematic structural diagram of a motor fixing bracket in a motor-regulated self-striking nozzle provided in an embodiment of the present invention.

[0052] Icons: 1-outer sleeve; 101-first radial through hole; 102-center hole; 103-connecting threaded section; 104-fixing hole; 2-moving plunger; 201-second radial through hole; 202-head rib; 203-rib through hole; 204-through cavity; 205-first annular groove; 3-center pintle; 301-pintle threaded section; 302-third radial through hole; 303-flow channel between grid plates; 304-blocking end face; 4-head cover component; 401-head cover threaded section; 402-second annular groove; 403-motor threaded hole; 404-center through hole; 405-square through hole; 5-motor fixing bracket; 501-driving through hole; 502-motor mounting hole; 503-head cover connecting hole; 6-first O-ring; 7-second O-ring; 8-fixing nut. DETAILED DESCRIPTION

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0054] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0056] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0058] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to 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 the specific circumstances.

[0059] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0060] For liquid rocket engines with variable thrust requirements, it is often necessary to adjust the engine thrust by changing the propellant supply flow rate. However, after the existing self-impact nozzle is designed and processed, it is no longer possible to adjust the nozzle's flow area and flow coefficient by changing the nozzle's internal structure and dimensions. According to the nozzle's mass flow formula, This means that when the nozzle flow rate decreases, the pressure drop at the nozzle outlet will also be greatly reduced, causing the nozzle's atomization ability to deteriorate sharply, reducing the combustion efficiency of the combustion chamber, and even causing severe conditions such as flameout.

[0061] In view of this, if Figure 1As shown, the motor-regulated self-strike nozzle provided in this embodiment includes: an outer sleeve 1, a movable plunger 2, a central pintle 3 and a motor component; a liquid collecting chamber is formed inside the outer sleeve 1, the movable plunger 2 is arranged in the liquid collecting chamber, and the bottom of the outer sleeve 1 has a central hole 102, and a first liquid outlet channel for vertically ejecting the propellant is formed between the outer wall of the movable plunger 2 and the hole wall of the central hole 102, and the liquid collecting chamber is connected to the first liquid outlet channel; the middle part of the movable plunger 2 has a through cavity 204, and the central pintle 3 is arranged in the through cavity 204. The bottom of the central pintle 3 has a flow-blocking end surface 304 located below the bottom of the movable plunger 2, and a second liquid outlet channel for horizontally ejecting the propellant is formed between the flow-blocking end surface 304 and the movable plunger 2, and the liquid collecting chamber is connected to the second liquid outlet channel; the motor component is transmission-connected to the movable plunger 2, and the motor component is configured to drive the movable plunger 2 to move in the liquid collecting chamber to simultaneously adjust the liquid outlet width of the first liquid outlet channel and the second liquid outlet channel.

[0062] The motor-regulated self-strike nozzle provided in this embodiment includes: an outer sleeve 1, a movable plunger 2, a central pintle 3 and a motor component; by installing the movable plunger 2 in the liquid collecting chamber inside the outer sleeve 1, a first liquid outlet channel is formed in the gap between the outer wall of the movable plunger 2 and the hole wall of the central hole 102 at the bottom of the outer sleeve 1, and the central pintle 3 is installed in the through cavity 204 of the movable plunger 2, and a second liquid outlet channel is formed between the flow-blocking end surface 304 at the bottom of the central pintle 3 and the bottom surface of the movable plunger 2. The propellants sprayed from the first liquid outlet channel and the second liquid outlet channel collide with each other, so that the liquid propellant is better atomized, and when the flow rate of the liquid propellant changes, the motor component can drive the movable plunger 2 to move in the liquid collecting chamber, realize active adjustment of the first liquid outlet channel and the second liquid outlet channel, ensure good atomization performance, and alleviate the technical problem in the prior art that the existing self-strike nozzle cannot change the flow channel area of ​​the nozzle, thereby affecting the atomization ability.

[0063] Regarding the structure and shape of the outer sleeve 1, specifically:

[0064] like Figure 2 、 Figure 3 As shown, a plurality of first radial through holes 101 are provided on the side wall of the outer sleeve 1, and the first radial through holes 101 are along the radial direction of the outer sleeve 1, and the external liquid propellant enters the liquid collecting chamber inside the outer sleeve 1 along the plurality of first radial through holes 101; a center hole 102 is provided at the bottom center position of the outer sleeve 1, and the movable plunger 2 is located in the liquid collecting chamber, and a first liquid outlet channel is formed between the outer wall of the movable plunger 2 and the hole wall of the center hole 102, and the liquid propellant in the liquid collecting chamber is ejected along the first liquid outlet channel; a connecting thread section 103 is provided on the top inner wall of the outer sleeve 1 for threaded connection with the head cover component 4; a connecting edge is extended outward from the bottom outer wall of the outer sleeve 1, and a plurality of fixing holes 104 are provided on the connecting edge for fixing and sealing with the combustion chamber by bolts.

[0065] Regarding the structure and shape of the mobile plunger 2, specifically:

[0066] like Figure 4 、 Figure 5 As shown, the movable plunger 2 is a key movable component in this embodiment. A plurality of second radial through holes 201 are provided on the side wall of the movable plunger 2. The second radial through holes 201 are arranged along the radial direction of the movable plunger 2 and are used to supply the liquid propellant to the flow channel in the central pintle 3. A head rib 202 is provided on the top of the movable plunger 2. The head rib 202 extends through the head cover component 4. A rib through hole 203 is provided on the head rib 202 for fixed connection with the driving end of the motor component, so that the movable plunger 2 makes controllable axial movement with the motor component; a through cavity 204 is formed in the middle of the movable plunger 2, and the central pintle 3 is inserted into the through cavity 204; a first annular groove 205 is provided on the outer wall of the movable plunger 2 for accommodating a first sealing ring, which plays a sealing role and prevents the propellant from flowing back into the upper part of the movable plunger 2; an annular first liquid outlet channel is formed between the movable plunger 2 and the bottom center hole 102 of the outer sleeve 1, the width of which changes with the axial displacement of the movable plunger 2, and liquid propellant is ejected from the first liquid outlet channel.

[0067] In addition, the bottom outer wall of the movable plunger 2 is in a vertical direction, and the liquid propellant flowing out of the first liquid outlet channel flows along the vertical bottom outer wall of the movable plunger 2, thereby being ejected in a vertical direction.

[0068] Regarding the combination and shape of the central pintle 3, specifically:

[0069] like Figure 6 As shown, the central pintle 3 is an important component for realizing the self-strike of the two-way liquid propellant. The top of the central pintle 3 has a pintle thread section 301, which is used to tighten the fixing nut 8 to fix the central pintle 3 to the head cover component 4, so that the central pintle 3 does not move during the operation of the nozzle, ensuring that the flow channel area of ​​the second liquid outlet flow channel and the flow channel 303 between the grid plates are only determined by the axial displacement of the moving plunger 2; the side wall of the central pintle 3 is opened with a plurality of third radial through holes 302, and the third radial through holes 302 are along the central pintle 3. The central pintle 3 is radially arranged, and a plurality of inter-grid flow channels 303 are provided at the bottom of the central pintle 3. After the liquid propellant flows along the second radial through hole 201, it flows into the third radial through hole 302 under the action of the pressure difference, and then further downwardly ejected from the inter-grid flow channel 303; the bottom of the central pintle 3 is a flow-blocking end surface 304. When the liquid propellant is ejected from the inter-grid flow channel 303, the flow-blocking end surface 304 serves to limit the flow direction of the propellant and to cause the propellant to be initially broken under the action of impact.

[0070] In addition, since the blocking end surface 304 is arranged horizontally, the liquid propellant sprayed from the second liquid outlet flow channel moves in the horizontal direction, so that the liquid propellants sprayed from the first liquid outlet flow channel and the second liquid outlet flow channel collide with each other to achieve atomization.

[0071] Regarding the structure and shape of the head cover member 4, specifically:

[0072] like Figure 7 、 Figure 8 As shown, the main function of the head cover member 4 is to fix the central pintle 3 and the motor fixing frame 5, and at the same time extend the head rib 202 of the movable plunger 2 so that the motor drive end can be connected to the movable plunger 2, controlling the nozzle components so that only the movable plunger 2 moves during operation;

[0073] The outer wall of the head cover component 4 has a head cover thread section 401, which is connected to the connecting thread section 103 to fix the head cover component 4 on the outer sleeve 1; a second annular groove 402 is provided on the outer wall of the head cover component 4, and the second O-ring 7 is installed in the second annular groove 402 to play a sealing role; a motor threaded hole 403 is provided on the top of the head cover component 4 for fixed connection with the motor fixing frame 5; a central through hole 404 is provided at the center position of the head cover component 4, and the central pintle 3 extends from the central through hole 404 and is fixed with the fixing nut 8; a plurality of square through holes 405 are provided on the head cover component 4, and the head rib 202 on the moving plunger 2 extends from the square through hole 405, and is connected to the motor moving part through the rib through hole 203 reserved on the head rib 202.

[0074] Regarding the shape and structure of the motor components, specifically:

[0075] like Figure 9 As shown, the motor component includes a drive motor and a motor fixing frame 5. The drive motor is installed on the motor fixing frame 5. The motor fixing frame 5 is provided with a drive through hole 501. The drive end of the drive motor passes through the drive through hole 501 and is connected with the head rib 202 on the movable plunger 2, so that the drive motor can pull or push the movable plunger 2 to make axial movement; the motor fixing frame 5 is provided with a motor mounting hole 502 for fixing and installing the drive motor; the motor fixing frame 5 is provided with a head cover connecting hole 503, and the bolt passes through the head cover connecting hole 503 and extends into the motor threaded hole 403 to fix the motor fixing frame 5 on the head cover component 4.

[0076] The first O-ring 6 and the second O-ring 7 are used to seal between the outer sleeve 1 and the movable plunger 2, and between the outer sleeve 1 and the head cover member 4, to prevent the liquid propellant from leaking back and causing the movable plunger 2 to move poorly or cause a safety accident, thereby improving the stability and safety of the system.

[0077] The motor-regulated self-strike nozzle provided in this embodiment uses a motor component to control the nozzle flow channel area and flow coefficient, and the operation is reliable, accurate, and repeatable. The relationship curve between the position of the moving plunger 2 and the nozzle pressure drop can be obtained through a cold flow calibration test. Under working conditions with different propellant flow rates, the driving motor can place the moving plunger 2 in a suitable position to ensure the atomization effect of the nozzle. The driving motor can be driven online by a predetermined program or a computer, so that during the test, the position of the moving plunger 2 can be dynamically adjusted according to the changes in the propellant flow rate.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A motor-regulated self-strike nozzle, characterized in that: include: An outer sleeve (1), a movable plunger (2), a central pintle (3) and a motor component; A liquid collecting chamber is formed inside the outer sleeve (1), the movable plunger (2) is arranged in the liquid collecting chamber, the bottom of the outer sleeve (1) has a central hole (102), a first liquid outlet channel for vertically ejecting the propellant is formed between the outer wall of the movable plunger (2) and the hole wall of the central hole (102), and the liquid collecting chamber is in communication with the first liquid outlet channel; The middle portion of the movable plunger (2) has a through cavity (204), the central pintle (3) is arranged in the through cavity (204), the bottom of the central pintle (3) has a flow-blocking end surface (304) located below the bottom of the movable plunger (2), a second liquid outlet channel for laterally ejecting the propellant is formed between the flow-blocking end surface (304) and the movable plunger (2), and the liquid collecting chamber is in communication with the second liquid outlet channel; The motor component is in transmission connection with the movable plunger (2), and the motor component is configured to drive the movable plunger (2) to move in the liquid collecting chamber to simultaneously adjust the liquid outlet widths of the first liquid outlet flow channel and the second liquid outlet flow channel; Along the radial direction of the movable plunger (2), the side wall of the movable plunger (2) has a plurality of second radial through holes (201), and the liquid collecting chamber is connected to the through cavity (204) through the plurality of second radial through holes (201); Along the radial direction of the central pintle (3), the side wall of the central pintle (3) has a plurality of third radial through holes (302), and the bottom of the central pintle (3) has an inter-grid plate flow channel (303), and the propellant in the liquid collecting chamber enters the second liquid outlet flow channel along the second radial through holes (201), the third radial through holes (302) and the inter-grid plate flow channel (303).

2. The motor-regulated self-strike nozzle according to claim 1, characterized in that: The motor-regulated self-strike nozzle further includes a head cover component (4); The head cover component (4) is covered on the outer sleeve (1), the head cover component (4) is connected to the central pintle (3), and one end of the movable plunger (2) passes through the head cover component (4) and is connected to the motor component.

3. The motor-regulated self-strike nozzle according to claim 2, characterized in that: Along the radial direction of the outer sleeve (1), the side wall of the outer sleeve (1) has a plurality of first radial through holes (101), and the liquid propellant enters the liquid collecting chamber through the plurality of first radial through holes (101); The inner wall of the outer sleeve (1) has a connecting thread section (103), and the head cover component (4) is connected to the connecting thread section (103); The bottom of the outer sleeve (1) extends outward to form a connecting edge, and a fixing hole (104) for connecting to the combustion chamber is provided on the connecting edge.

4. The motor-regulated self-strike nozzle according to claim 3, characterized in that: The top of the movable plunger (2) is provided with a head rib (202), a rib through-hole (203) is provided on the head rib (202), and the head rib (202) is connected to the motor component through the rib through-hole (203); The outer wall of the movable plunger (2) has a first annular groove (205), and the first annular groove (205) is used for installing a first O-ring (6).

5. The motor-regulated self-strike nozzle according to claim 4, characterized in that: The motor-regulated self-strike nozzle further includes a fixing nut (8); The fixing nut (8) is located on the top of the head cover component (4), and the fixing nut (8) is connected to the top of the central pintle (3).

6. The motor-regulated self-strike nozzle according to claim 5, characterized in that: The top of the central pintle (3) is provided with a pintle thread section (301), and the pintle thread section (301) is connected to the fixing nut (8).

7. The motor-regulated self-strike nozzle according to claim 6, characterized in that: The outer wall of the head cover component (4) has a head cover thread section (401), and the head cover thread section (401) is connected to the connecting thread section (103); The outer wall of the head cover component (4) has a second annular groove (402), and the second annular groove (402) is used to install a second O-ring (7); The top of the head cover component (4) is provided with a motor threaded hole (403), and the head cover component (4) is connected to the motor component via the motor threaded hole (403).

8. The motor-regulated self-strike nozzle according to claim 7, characterized in that: The middle portion of the head cover component (4) has a central through hole (404), and the top of the central pintle (3) passes through the central through hole (404) and is connected to the fixing nut (8); The top of the head cover component (4) is provided with a square through hole (405), and the head rib (202) passes through the square through hole (405) to be connected to the motor component.

9. The motor-regulated self-strike nozzle according to claim 2, characterized in that: The motor component comprises a drive motor and a motor fixing frame (5); The driving motor is fixed on the motor fixing frame (5), and the motor fixing frame (5) is connected to the head cover component (4).

10. The motor-regulated self-strike nozzle according to claim 9, characterized in that: The motor fixing frame (5) has an upper plate and a lower plate connected to each other, and the middle portion of the upper plate has a driving through hole (501) for the driving end of the driving motor to extend into. The upper plate is provided with a motor mounting hole (502) for fixing the drive motor; The lower plate is provided with a head cover connection hole (503) for connecting the head cover component (4).

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