Array type composite emitter ionic liquid electrospray thruster containing far-end electrode

Abstract

The invention provides an array type composite emitter ionic liquid electrospray thruster containing a far-end electrode, and relates to the technical field of spaceflight thrusters, an insulating material is adopted to process a composite emitter assembly, so that a double charge layer is generated at an ionic liquid electrode component, electrochemical reaction cannot be generated at an inner flow channel of a composite emitter, and the composite emitter assembly is made to be uniform. The problem that an electrochemical reaction product is directly generated in the composite emitter to block an internal flow channel of the emitter is avoided, and through the arrangement of a transverse flow channel, a vertical flow channel and a liquid collecting tank, a zigzag liquid flow channel is formed, so that the electrochemical reaction product generated at the electrode component is more uniform and uniform. When the ionic liquid flows, the ionic liquid is limited at the position of the electrode component by the flow channel wall surface and cannot enter the inlet of the base flow channel of the composite emitter assembly along with the ionic liquid, so that the influence of electrochemical reaction on the work of the composite emitter is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace thrusters, in particular to an array-type composite emitter ionic liquid electrospray thruster containing a remote electrode. Background Art

[0002] With advances in micro-electromechanical processing (MEMS) technology, microsatellites have become a hot topic in the aerospace industry. Since 2010, the number of microsatellite launches has skyrocketed, making them a mainstream aerospace product. As a micro-electric propulsion technology, ionic liquid electrospray thrusters are highly suitable for microsatellites due to their simple structure and ease of miniaturization.

[0003] The core physics behind ionic liquid electrospraying is the generation of thrust by ionic liquids in various states, such as liquid and ions, under the influence of an electric field. One of the main factors affecting the application of ionic liquid electrospray thrusters is their lifespan. When an operating voltage is applied to the emitter, the wall where the emitter contacts the ionic liquid attracts ions with opposite polarity within the ionic liquid, which adhere to its surface and gradually form a double charge layer.

[0004] The potential difference between the double charge layers is small, but due to the extremely small thickness of the double charge layer, the electric field strength therebetween is extremely large. The strong electric field environment within the double charge layer promotes the electrochemical reaction of the ionic liquid, resulting in a decrease in the emission current of the electrospray thruster, and the corresponding thrust generated by the thruster will also decrease rapidly. Experiments have found that the emission current can be increased by continuing to increase the emission voltage, but when the products of the electrochemical reaction of the ionic liquid accumulate to a certain level, even if the emission voltage is increased, no emission current can be generated.

[0005] In summary, in the existing metal composite emitter ionic liquid electrospray thruster, the working voltage is directly applied to the emitter, and the ionic liquid forms a double charge layer on the capillary wall, causing the electrochemical reaction products of the liquid to be directly generated in the inner flow channel of the composite emitter. Over a long period of accumulation, it will block the internal flow channel of the emitter and affect the normal operation of the composite emitter. Summary of the Invention

[0006] The purpose of the present invention is to provide an array-type composite emitter ionic liquid electrospray thruster containing a remote electrode, so as to alleviate the technical problem existing in the prior art of the existing metal composite emitter ionic liquid electrospray thruster, in which the electrochemical reaction products are directly generated in the inner flow channel of the composite emitter, which will block the internal flow channel of the emitter and affect the normal operation of the composite emitter.

[0007] The array-type composite emitter ionic liquid electrospray thruster with a distal electrode provided by the present invention comprises: a composite emitter assembly, an emitter mounting seat, a fixed mounting seat, an electrode component and a flow channel joint; The composite emitter assembly is mounted on the emitter mounting base, and the composite emitter assembly is made of insulating material; The emitter mounting base and the fixed mounting base are connected to each other; The electrode component is disposed between the emitter mounting seat and the fixed mounting seat, and the electrode component is formed with a plurality of vertical flow channels; The flow channel joint is mounted on the fixed mounting seat, and has a plurality of transverse flow channels. The top of the flow channel joint is recessed to form a liquid collecting groove. The plurality of transverse flow channels, the plurality of vertical flow channels, and the liquid collecting groove are sequentially connected to form a bent liquid flow channel. The ionic liquid moves laterally along the plurality of the transverse flow channels and enters the plurality of the vertical flow channels. The ionic liquid in the vertical flow channels overflows and enters the liquid collecting tank, and the liquid collecting tank is communicated with the composite emitter assembly.

[0008] In an alternative embodiment, The electrode component includes an integrally formed circular ring mounting structure and a cylindrical electrode structure; The annular mounting structure is arranged around the outside of the cylindrical electrode structure, and the inner wall of the cylindrical electrode structure extends inward to form a protruding electrode. There are multiple protruding electrodes, and the multiple protruding electrodes are evenly spaced along the circumferential direction of the cylindrical electrode structure so that the vertical flow channel is formed between two adjacent protruding electrodes.

[0009] In an alternative embodiment, The electrode member further includes an electrode terminal; One end of the electrode terminal is connected to the annular mounting structure, and the other end of the electrode terminal extends out of the fixed mounting seat.

[0010] In an alternative embodiment, The flow channel joint includes a joint base plate and a joint body connected to each other; A plurality of protruding electrodes are arranged around the outer wall of the connector body; The top of the joint body is recessed to form the liquid collecting groove; The joint bottom plate has a liquid inlet hole, the joint body is provided with a plurality of flow holes along the radial direction, each of the flow holes forms a transverse flow channel, and the liquid inlet hole is communicated with the plurality of flow holes.

[0011] In an alternative embodiment, The fixed mounting seat is provided with a receiving hole, the joint body is passed through the receiving hole, and the inner wall of the receiving hole has a guiding slope, and the ionic liquid flowing out of the horizontal flow channel is guided by the guiding slope and then enters the vertical flow channel.

[0012] In an alternative embodiment, The bottom of the emitter mounting seat is provided with a receiving groove, and the cylindrical electrode structure is arranged in the receiving groove; The emitter mounting seat is provided with a connecting portion, which extends into the liquid collecting tank. The connecting portion is penetrated by a through hole, and the ionic liquid in the liquid collecting tank enters the composite emitter assembly through the through hole.

[0013] In an alternative embodiment, The composite emitter assembly is provided with a central communicating hole, wherein the central communicating hole is connected to the through hole; The composite emitter assembly is provided with a plurality of composite emitters arranged in an array, and the length and width of the flow channel between each composite emitter and the central connecting hole are the same.

[0014] In an alternative embodiment, The composite emitter assembly includes an emitter base plate; The plurality of composite emitters are arranged in an array on the emitter base plate, and a main flow channel and a branch flow channel are formed inside the emitter base plate. One end of the main flow channel is connected to the central connecting hole, and the other end of the main flow channel is connected to the plurality of branch flow channels, and the ends of the plurality of branch flow channels are respectively connected to the composite emitters, and the length and width of each branch flow channel are the same.

[0015] In an alternative embodiment, A first sealing ring is provided between the annular mounting structure and the fixed mounting seat; A second sealing ring is provided between the joint base plate and the fixed mounting seat; A third sealing ring is provided between the emitter base plate and the emitter mounting seat; A fourth sealing ring is provided between the annular mounting structure and the emitter mounting seat.

[0016] In an alternative embodiment, Also included are an extraction plate, a first connecting member, and a second connecting member; The extraction plate is arranged above the composite emitter assembly; The first connecting member passes through the extraction plate and the emitter mounting base, and the first connecting member is located between the extraction plate and the emitter mounting base and is provided with an isolation column; The second connecting member passes through the emitter mounting seat and the fixed mounting seat.

[0017] The array-type composite emitter ionic liquid electrospray thruster containing a remote electrode provided by the present invention uses insulating materials to process the composite emitter assembly, so that a double charge layer is generated at the ionic liquid electrode component, and an electrochemical reaction cannot occur in the inner flow channel of the composite emitter, thereby avoiding the problem of electrochemical reaction products being directly generated in the composite emitter and causing blockage of the internal flow channel of the emitter. In addition, through the arrangement of horizontal flow channels, vertical flow channels and collecting tanks, a tortuous liquid flow channel is formed, so that the electrochemical reaction products generated at the electrode component will be restricted by the flow channel wall to the position of the electrode component, and cannot follow the ionic liquid into the base flow channel inlet of the composite emitter assembly, thereby preventing the electrochemical reaction from affecting the operation of the composite emitter, and alleviating the technical problem of existing metal composite emitter ionic liquid electrospray thrusters in the prior art, in which electrochemical reaction products are directly generated in the inner flow channel of the composite emitter, which will block the internal flow channel of the emitter and affect the normal operation of the composite emitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 A schematic diagram of the overall structure of an array-type composite emitter ionic liquid electrospray thruster with a remote electrode provided in an embodiment of the present invention; Figure 2 An exploded view of the overall structure of an array-type composite emitter ionic liquid electrospray thruster with a remote electrode provided in an embodiment of the present invention; Figure 3 A cross-sectional view of the overall structure of an array-type composite emitter ionic liquid electrospray thruster with a distal electrode provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a composite emitter assembly in an array-type composite emitter ionic liquid electrospray thruster containing a remote electrode provided by an embodiment of the present invention; Figure 5 A schematic diagram of the internal structure of a composite emitter assembly in an array-type composite emitter ionic liquid electrospray thruster with a remote electrode provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of an emitter mounting base in an array-type composite emitter ionic liquid electrospray thruster containing a distal electrode provided by an embodiment of the present invention; Figure 7A schematic structural diagram of an emitter mounting base in an array-type composite emitter ionic liquid electrospray thruster with a distal electrode provided by an embodiment of the present invention, viewed from another perspective; Figure 8 A schematic structural diagram of a fixed mounting base in an array-type composite emitter ionic liquid electrospray thruster containing a distal electrode provided by an embodiment of the present invention; Figure 9 A schematic structural diagram of an electrode component in an array-type composite emitter ionic liquid electrospray thruster containing a remote electrode provided by an embodiment of the present invention; Figure 10 A schematic structural diagram of a flow channel joint in an array-type composite emitter ionic liquid electrospray thruster containing a distal electrode provided by an embodiment of the present invention; Figure 11 A schematic structural diagram of a flow channel joint in an array-type composite emitter ionic liquid electrospray thruster containing a distal electrode provided in an embodiment of the present invention from another perspective.

[0020] Icons: 100-composite emitter assembly; 110-emitter base plate; 111-middle connecting hole; 112-main flow channel; 113-shunt flow channel; 120-composite emitter; 200-emitter mounting seat; 210-accommodation groove; 220-connecting portion; 221-through hole; 300-fixed mounting seat; 310-accommodation hole; 320-guide slope; 330-circular groove; 340-long groove; 400-electrode component; 410-circular ring Mounting structure; 420-cylindrical electrode structure; 430-raised electrode; 440-electrode terminal; 500-flow channel joint; 510-joint base plate; 511-liquid inlet hole; 520-joint body; 521-liquid collecting tank; 522-circulation hole; 610-first sealing ring; 620-second sealing ring; 630-third sealing ring; 640-fourth sealing ring; 700-extraction plate; 800-first connecting member; 900-second connecting member. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, 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; and 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.

[0024] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0025] like Figure 1 、 Figure 2 、 Figure 3 As shown, the array-type composite emitter ionic liquid electrospray thruster with remote electrodes provided in this embodiment includes: a composite emitter assembly 100, an emitter mounting base 200, a fixed mounting base 300, an electrode member 400 and a flow channel joint 500; The composite emitter assembly 100 is installed on the emitter mounting seat 200. Specifically, the top surface of the emitter mounting seat 200 is partially recessed to form a groove, and the composite emitter assembly 100 is placed in the groove, so that the top surface of the composite emitter assembly 100 is flush with the top surface of the emitter mounting seat 200. The composite emitter assembly 100 is set to an insulating material, specifically a non-conductive photosensitive resin material, and the composite emitter assembly 100 is processed by high-precision light-curing 3D printing technology.

[0026] The emitter mounting base 200 and the fixed mounting base 300 are connected to each other, specifically, by setting a second connecting member 900, the second connecting member 900 specifically includes a second countersunk bolt, a second flat washer and a second connecting nut, the second countersunk bolt passes through the emitter mounting base 200 and the fixed mounting base 300, and the countersunk position is embedded in the emitter mounting base 200, the second connecting nut is threadedly connected to the second countersunk bolt, and a second flat washer is provided between the second connecting nut and the fixed mounting base 300, so that the emitter mounting base 200 and the fixed mounting base 300 are assembled using the second connecting member 900.

[0027] The electrode component 400 is arranged between the emitter mounting seat 200 and the fixed mounting seat 300. The electrode component 400 is formed with multiple vertical flow channels. The flow channel joint 500 is installed on the fixed mounting seat 300. The flow channel joint 500 has multiple transverse flow channels. The top of the flow channel joint 500 is recessed to form a liquid collecting tank 521. Multiple transverse flow channels, multiple vertical flow channels and the liquid collecting tank 521 are connected in sequence to form a bent liquid flow channel. After the ionic liquid enters through the flow channel joint 500, it moves laterally along the transverse flow channel, and then enters the vertical flow channel and moves vertically along the vertical flow channel. After the liquid level gradually rises, the ionic liquid overflows laterally into the liquid collecting tank 521. The ionic liquid gathers in the liquid collecting tank 521. The liquid collecting tank 521 is connected to the composite emitter assembly 100, and the ionic liquid enters the composite emitter assembly 100.

[0028] The array-type composite emitter ionic liquid electrospray thruster with remote electrodes provided in this embodiment uses insulating materials to process the composite emitter assembly 100, thereby generating a double charge layer at the ionic liquid electrode component 400. This prevents electrochemical reactions from occurring in the internal flow channel of the composite emitter 120, thereby avoiding the problem of electrochemical reaction products being directly generated in the composite emitter 120 and causing blockage of the emitter's internal flow channel. In addition, by providing the transverse flow channel, vertical flow channel, and liquid collecting tank 521, a tortuous liquid flow channel is formed, so that the electrochemical reaction products generated at the electrode component 400 will be confined to the location of the electrode component 400 by the flow channel wall and cannot follow the ionic liquid into the base flow channel entrance of the composite emitter assembly 100, thereby preventing the electrochemical reaction from affecting the operation of the composite emitter 120. This alleviates the technical problem in the prior art of existing metal composite emitter 120 ionic liquid electrospray thrusters, where electrochemical reaction products are directly generated in the internal flow channel of the composite emitter 120, blocking the internal flow channel of the emitter and affecting the normal operation of the composite emitter 120.

[0029] Regarding the structure and shape of the electrode member 400, specifically: like Figure 9As shown, the electrode component 400 includes an integrally formed annular mounting structure 410 and a cylindrical electrode structure 420; the annular mounting structure 410 is arranged around the outside of the cylindrical electrode structure 420, and the inner wall of the cylindrical electrode structure 420 extends inward to form a protruding electrode 430, and the protruding electrode 430 is arranged vertically. There are multiple protruding electrodes 430, and the multiple protruding electrodes 430 are evenly spaced along the circumferential direction of the cylindrical electrode structure 420 to form a vertical flow channel between adjacent two protruding electrodes 430, and the arrangement of multiple protruding electrodes 430 increases the contact area with the ionic liquid.

[0030] In addition, an escape groove is provided on the outer circumference of the annular mounting structure 410 to facilitate the passage of the second connecting member 900 .

[0031] The electrode component 400 further includes an electrode terminal 440 ; one end of the electrode terminal 440 is connected to the annular mounting structure 410 , and the other end of the electrode terminal 440 extends out of the fixed mounting seat 300 . The electrode terminal 440 is used for grounding or connecting to a high voltage output.

[0032] Regarding the structure and shape of the flow channel joint 500, specifically: like Figure 10 、 Figure 11 As shown, the flow channel joint 500 includes a joint base plate 510 and a joint body 520 that are interconnected. The joint body 520 is located in the middle of the joint base plate 510, and the joint base plate 510 and the joint body 520 are an integrally formed structure. A plurality of raised electrodes 430 are arranged around the outer wall of the joint body 520; the top of the joint body 520 is recessed to form a liquid collecting tank 521; a liquid inlet hole 511 is provided in the middle of the joint base plate 510, and a plurality of flow holes 522 are provided at the bottom of the joint body 520 along the radial direction, each flow hole 522 forming a transverse flow channel, and the liquid inlet hole 511 is connected to the plurality of flow holes 522, so that the ionic liquid entering from the liquid inlet hole 511 enters the plurality of flow holes 522 and moves laterally.

[0033] Regarding the structure and shape of the fixed mounting base 300, specifically: like Figure 8 As shown, the fixed mounting base 300 is provided with a receiving hole 310, which is located at the center of the fixed mounting base 300. The joint body 520 is passed through the receiving hole 310, and the inner wall of the receiving hole 310 has a guide slope 320. Since the guide slope 320 is inclined, the ionic liquid flowing out of the horizontal flow channel can enter the vertical flow channel after being guided by the guide slope 320.

[0034] In addition, in order to facilitate the flushing of the annular mounting structure 410 with the top surface of the fixed mounting seat 300, an annular groove 330 is formed in the top surface of the fixed mounting seat 300. The annular mounting structure 410 is placed in the annular groove 330, so that the top surface of the annular mounting structure 410 can be flush with the top surface of the fixed mounting seat 300. Moreover, in order to facilitate the extension of the electrode terminal 440, a long groove 340 is formed in the top surface of the fixed mounting seat 300. The electrode terminal 440 is placed in the long groove 340. Moreover, since the long groove 340 passes through the side wall of the fixed mounting seat 300, the electrode terminal 440 placed in the long groove 340 can be extended.

[0035] Regarding the structure and shape of the emitter mount 200, specifically: like Figure 6 、 Figure 7 As shown, the bottom of the emitter mounting seat 200 is recessed toward the top to form a receiving groove 210, and the cylindrical electrode structure 420 is arranged in the receiving groove 210. The emitter mounting seat 200 is provided with a connecting portion 220, and the connecting portion 220 is located in the middle of the receiving groove 210. The connecting portion 220 extends into the liquid collecting groove 521, and a through hole 221 is provided through the middle of the connecting portion 220. The ionic liquid in the liquid collecting groove 521 enters the composite emitter assembly 100 through the through hole 221.

[0036] Regarding the structure and shape of the composite emitter assembly 100, specifically: like Figure 4 As shown, the composite emitter assembly 100 includes an emitter base plate 110, a central connecting hole 111 is opened in the middle position of the emitter base plate 110, and the central connecting hole 111 is connected to the through hole 221. A plurality of composite emitters 120 arranged in an array are provided on the emitter base plate 110, and the length and width of the flow channel between each composite emitter 120 and the central connecting hole 111 are the same.

[0037] Specifically, such as Figure 5 As shown, multiple composite emitters 120 are arranged in an array on the emitter base plate 110, and a main flow channel 112 and a branch flow channel 113 are formed inside the emitter base plate 110. One end of the main flow channel 112 is connected to the central connecting hole 111, and the other end of the main flow channel 112 is connected to multiple branch flow channels 113, and the ends of the multiple branch flow channels 113 are respectively connected to the composite emitter 120. The length and width of each branch flow channel 113 are the same, forming a microchannel structure with completely consistent length and width.

[0038] For example, the number of compound emitters 120 is set to 16, and the 16 compound emitters 120 are arranged in an array, and there are 4 main flow channels 112 corresponding to the central connecting hole 111. The end of each main flow channel 112 is connected to 4 branch flow channels 113. Since the length and width of the multiple main flow channels 112 are the same, the length and width of the multiple branch flow channels 113 are the same, so that the flow channel length and width of each compound emitter 120 are completely consistent, and the liquid has the same flow resistance during transportation, so that each compound emitter 120 has the same working fluid flow rate.

[0039] In an optional embodiment, a first sealing ring 610 is arranged between the annular mounting structure 410 and the fixed mounting seat 300, a second sealing ring 620 is arranged between the joint base plate 510 and the fixed mounting seat 300, a third sealing ring 630 is arranged between the emitter base plate 110 and the emitter mounting seat 200, and a fourth sealing ring 640 is arranged between the annular mounting structure 410 and the emitter mounting seat 200. The first sealing ring 610, the second sealing ring 620, the third sealing ring 630 and the fourth sealing ring 640 ensure that the liquid will not leak.

[0040] In an optional embodiment, it also includes an extraction plate 700 and a first connecting member 800; the extraction plate 700 is arranged above the composite emitter assembly 100; the first connecting member 800 passes through the extraction plate 700 and the emitter mounting base 200, and the first connecting member 800 is located between the extraction plate 700 and the emitter mounting base 200 and an isolation column is provided.

[0041] Specifically, the first connecting member 800 includes a first bolt, an isolation column, a first flat washer and a first connecting nut. The first bolt passes through the extraction plate 700 and the emitter mounting seat 200, and is connected to the extraction plate 700 and the emitter mounting seat 200 through the cooperation of the first flat washer and the first connecting nut. The isolation column is specifically an ABS isolation column, which can insulate high-voltage signals and control the distance between the extraction plate 700 and the composite emitter assembly 100.

[0042] In addition, the composite emitter assembly 100 and the emitter mounting base 200 may also be connected by bolts.

[0043] In summary, the present invention provides an array-type composite emitter ionic liquid electrospray thruster with a distal electrode. The composite emitter assembly 100 is made of a non-conductive photosensitive resin material. The composite emitter assembly 100 is processed by high-precision light-curing 3D printing technology, and a microchannel structure is formed in the emitter base plate 110. Each microchannel has the same length and width, and has the same flow resistance during liquid transportation, thereby achieving the same working fluid flow rate for each emitter in the emitter array. A tortuous liquid flow channel is constructed, and the electrode component 400 is installed in the channel. After the ionic liquid enters the channel through the channel connector 500, it will first fully contact the surface of the electrode component 400 and then enter the microchannel structure. During operation, the ionic liquid undergoes an electrochemical reaction on the surface of the electrode component 400. Its products (solid and gaseous) cannot enter the microchannel structure due to the restriction of the liquid flow channel wall, thereby limiting its impact on the electrospray emission.

[0044] 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. An array-type composite emitter ionic liquid electrospray thruster containing a distal electrode, characterized in that: include: A composite emitter assembly (100), an emitter mounting seat (200), a fixed mounting seat (300), an electrode component (400), and a flow channel joint (500); The composite emitter assembly (100) is mounted on the emitter mounting seat (200), and the composite emitter assembly (100) is configured as an insulating material; The emitter mounting seat (200) and the fixed mounting seat (300) are connected to each other; The electrode component (400) is arranged between the emitter mounting seat (200) and the fixed mounting seat (300), and the electrode component (400) is formed with a plurality of vertical flow channels; The flow channel joint (500) is mounted on the fixed mounting seat (300), and the flow channel joint (500) has a plurality of transverse flow channels. The top of the flow channel joint (500) is recessed to form a liquid collecting trough (521), and the plurality of transverse flow channels, the plurality of vertical flow channels, and the liquid collecting trough (521) are sequentially connected to form a bent liquid flow channel; The ionic liquid moves laterally along the plurality of transverse flow channels and enters the plurality of vertical flow channels. The ionic liquid in the vertical flow channels overflows and enters the liquid collecting trough (521). The liquid collecting trough (521) is in communication with the composite emitter assembly (100).

2. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 1, characterized in that: The electrode component (400) comprises an integrally formed annular mounting structure (410) and a cylindrical electrode structure (420); The annular mounting structure (410) is arranged around the outside of the cylindrical electrode structure (420), and the inner wall of the cylindrical electrode structure (420) extends inward to form a protruding electrode (430). There are multiple protruding electrodes (430), and the multiple protruding electrodes (430) are evenly spaced along the circumferential direction of the cylindrical electrode structure (420) so that the vertical flow channel is formed between two adjacent protruding electrodes (430).

3. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 2, characterized in that: The electrode component (400) further includes an electrode terminal (440); One end of the electrode terminal (440) is connected to the annular mounting structure (410), and the other end of the electrode terminal (440) extends out of the fixed mounting seat (300).

4. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 3, characterized in that: The flow channel joint (500) comprises a joint base plate (510) and a joint body (520) connected to each other; A plurality of raised electrodes (430) are arranged around the outer wall of the connector body (520); The top of the joint body (520) is recessed to form the liquid collecting groove (521); The joint base plate (510) has a liquid inlet hole (511), and the joint body (520) is provided with a plurality of flow holes (522) along a radial direction, each of the flow holes (522) forming a transverse flow channel, and the liquid inlet hole (511) is in communication with the plurality of flow holes (522).

5. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 4, characterized in that: The fixed mounting seat (300) is provided with a receiving hole (310), the joint body (520) is passed through the receiving hole (310), and the inner wall of the receiving hole (310) has a guide slope (320), and the ionic liquid flowing out of the horizontal flow channel is guided by the guide slope (320) and then enters the vertical flow channel.

6. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 5, characterized in that: The bottom of the emitter mounting seat (200) is provided with a receiving groove (210), and the cylindrical electrode structure (420) is arranged in the receiving groove (210); The emitter mounting seat (200) is provided with a connecting portion (220), the connecting portion (220) extends into the liquid collecting tank (521), and a through hole (221) is provided through the connecting portion (220), and the ionic liquid in the liquid collecting tank (521) enters the composite emitter assembly (100) through the through hole (221).

7. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 6, characterized in that: The composite emitter component (100) is provided with a central communicating hole (111), and the central communicating hole (111) is connected to the through hole (221); The composite emitter component (100) is provided with a plurality of composite emitters (120) arranged in an array, and the length and width of the flow channel between each composite emitter (120) and the central connecting hole (111) are the same.

8. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 7, characterized in that: The composite emitter assembly (100) comprises an emitter base plate (110); The plurality of composite emitters (120) are arranged in an array on the emitter base plate (110), and a main flow channel (112) and a branch flow channel (113) are formed inside the emitter base plate (110), one end of the main flow channel (112) is connected to the middle connecting hole (111), and the other end of the main flow channel (112) is connected to the plurality of branch flow channels (113), and the ends of the plurality of branch flow channels (113) are respectively connected to the composite emitter (120), and the length and width of each branch flow channel (113) are the same.

9. The array-type composite emitter ionic liquid electrospray thruster with distal electrodes according to claim 8, characterized in that: A first sealing ring (610) is provided between the annular mounting structure (410) and the fixed mounting seat (300); A second sealing ring (620) is provided between the joint base plate (510) and the fixed mounting seat (300); A third sealing ring (630) is provided between the emitter base plate (110) and the emitter mounting seat (200); A fourth sealing ring (640) is provided between the annular mounting structure (410) and the emitter mounting seat (200).

10. The array-type composite emitter ionic liquid electrospray thruster containing a distal electrode according to any one of claims 1 to 9, characterized in that: It also includes an extraction plate (700), a first connecting member (800) and a second connecting member (900); The extraction plate (700) is arranged above the composite emitter component (100); The first connecting member (800) passes through the extraction plate (700) and the emitter mounting seat (200), and the first connecting member (800) is located between the extraction plate (700) and the emitter mounting seat (200), and an isolation column is provided; The second connecting member (900) passes through the emitter mounting seat (200) and the fixed mounting seat (300).

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