An independently controllable array type colloidal micro-propeller based on induced jet

Abstract

The application belongs to the technical field of spaceflight micro-propeller, and discloses an independent controllable array type colloidal micro-propeller based on induced ejection, which comprises an ink cartridge, a flow channel plate arranged on the ink cartridge and an emitter arranged on the flow channel plate, the emitter comprises a protruding nozzle and an ejection electrode, the ejection electrode is plate-shaped and arranged on the flow channel plate, one end of the protruding nozzle is arranged on the flow channel plate after penetrating through the ejection electrode, and the protruding nozzle is communicated with the ink cartridge through the flow channel plate; the ejection electrode is not communicated with the ink cartridge; wherein the protruding nozzle is made of insulating material. The strong electric field formed between the ejection electrode and the extraction electrode induces the solution charge of the insulating protruding nozzle tip to complete the ejection, avoids the generation of internal electrochemical reaction of the emitter, and further solves the problems of emitter corrosion and independent control failure in the current colloidal micro-propeller, and improves the performance and service life of the whole spaceflight system.

Description

Technical Field

[0001] This invention belongs to the technical field of aerospace micro-thrusters, and more specifically, relates to an independently controllable array-type colloidal micro-thruster based on induced jetting. Background Technology

[0002] With the rapid development of aerospace technology, microsatellites and nanosatellites, with their advantages of small size, light weight, low power consumption, and short development cycle, have shown broad application prospects in fields such as geological exploration, environmental monitoring, data transmission, and scientific experiments. The thruster is a key component of microsatellites and nanosatellites. Compared to traditional chemical thrusters, colloidal micro-thrusters, due to their high specific impulse, low noise, long lifespan, high energy conversion rate, and precisely adjustable thrust, can meet the diverse mission requirements of microsatellites and nanosatellites, including attitude adjustment, orbital maneuvering, gravitational compensation, and space gravitational wave detection.

[0003] Colloidal microthrusters utilize highly polar solutions such as ionic liquids as propellants. During operation, the meniscus at the emitter tip gradually forms a Taylor cone under a strong electric field, generating a jet. The jet breaks apart at its end, forming tiny, uniformly charged droplets that are accelerated outwards, generating reverse thrust. In existing research, the emitter is fabricated using MEMS silicon micromachining technology or assembled from stainless steel capillaries. Because the emitter is conductive, when directly connected to a high-voltage power source, the solution carries a large number of free charges. When the double-layer potential reaches a certain level, an electrochemical reaction occurs inside the nozzle. The precipitation of byproducts and the generation of tiny bubbles accelerate the corrosion of the emitter, severely shortening the lifespan of the entire aerospace system. Furthermore, traditional microthrusters cannot independently control the opening and closing of each emitter, making precise thrust control difficult. This results in weak adaptability, hindering the completion of high-precision space missions such as microsatellite networking and gravity gradient measurement.

[0004] Patent CN200910074195.3 proposes a micro-array colloidal thruster. When high pressure is applied to the silicon-based jet electrode, the liquid will carry a large number of free charges. The electrochemical reaction that occurs inside the jet electrode makes it difficult for the spacecraft to operate for a long time. Patent CN201910639644.8 proposes an ionic liquid electric thruster structure. The same potential is applied to the electrode plates, making it impossible to control the opening and closing state of each emitter. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides an independently controllable array-type colloidal micro-thruster based on induced jetting. It achieves jetting by inducing solution charge at the tip of an insulated protruding nozzle through a strong electric field formed between the jetting electrode and the extraction electrode, thus avoiding electrochemical reactions within the emitter. The opening and closing states of each protruding nozzle are controlled by an electrode ring arranged on the extraction electrode. This solves problems such as emitter corrosion and the inability to achieve independent control in current colloidal micro-thrusters, thereby improving the performance and service life of the entire aerospace system.

[0006] To achieve the above objectives, according to one aspect of the present invention, an independently controllable array-type colloidal micro-propeller based on induced jetting is provided. The micro-propeller includes an ink cartridge, a flow channel plate disposed on the ink cartridge, and an emitter disposed on the flow channel plate. The emitter includes a protruding nozzle and a jetting electrode. The jetting electrode is plate-shaped and disposed on the flow channel plate. One end of the protruding nozzle passes through the jetting electrode and is disposed on the flow channel plate, and is connected to the ink cartridge through the flow channel plate. The jetting electrode is not connected to the ink cartridge.

[0007] The protruding nozzle is made of insulating material.

[0008] Furthermore, the plurality of protruding nozzles are arranged in an array, and the plurality of protruding nozzles are evenly distributed around the central axis of the jet electrode.

[0009] Furthermore, the micro-thruster also includes an extraction electrode and an acceleration electrode, wherein the jet electrode, the extraction electrode, and the acceleration electrode are arranged sequentially at intervals and are connected to each other.

[0010] Furthermore, the extraction electrode is disposed on the perforated glass and includes multiple independently controllable electrode rings and conductive paths connected to the electrode rings. The positions of the multiple electrode rings correspond to the positions of the multiple protruding nozzles.

[0011] Furthermore, the inner diameter of the electrode ring is 3 to 5 times larger than the outer diameter of the protruding nozzle.

[0012] Furthermore, insulating gaskets are respectively provided between the perforated glass and the ink cartridge, and between the accelerating electrode and the perforated glass, and the insulating gaskets are rectangular frames.

[0013] Furthermore, the flow channel plate and the jet electrode are housed within the insulating pad.

[0014] Furthermore, the accelerating electrode has multiple circular through holes, the positions of which correspond to the positions of the multiple protruding nozzles.

[0015] Furthermore, the inner diameter of the circular through hole is 200μm to 500μm larger than the inner diameter of the electrode ring.

[0016] Furthermore, the flow channel plate includes a cavity layer and a nozzle channel layer. The cavity layer is disposed on the ink cartridge and is connected to the ink cartridge. The nozzle channel layer is disposed on the cavity layer and is connected to the cavity layer. Multiple nozzles are vertically disposed in the nozzle channel layer, and the multiple nozzles correspond one-to-one with the multiple protruding nozzles.

[0017] In summary, compared with the prior art, the independently controllable array-type colloidal micro-thruster based on induced jet provided by the present invention has the following beneficial effects:

[0018] 1. The emitter consists of two parts: an insulated protruding nozzle and a jet electrode. The jetting is completed by inducing the strong polar solution to be charged through the strong electric field formed between the jet electrode and the extraction electrode. The solution in the protruding nozzle does not directly contact the jet electrode, which can effectively avoid the precipitation of additional products and the generation of fine bubbles caused by the electrochemical reaction inside the emitter. This solves the problems of reduced spacecraft system performance, shortened lifespan, or even direct system failure caused by electrode corrosion in current colloidal micro-thrusters, and improves the reliability and stability of the entire system.

[0019] 2. In this invention, the electric field strength at the bend of the corresponding protruding nozzle can be adjusted by individually controlling the voltage of each electrode ring on the extraction electrode, thereby controlling the spray state of each protruding nozzle. By opening different numbers of protruding nozzles, the thruster can be adjusted with small thrust and wide range, thereby improving the flexibility of the colloidal micro-thruster and expanding the mission range of the spacecraft.

[0020] 3. In this invention, the ink cartridge, flow channel plate, and emitter protruding nozzle of the micro-propulsion device are all made of insulating materials, which not only improves the high voltage resistance of the entire propulsion system, but also makes the electric field at the tip of the protruding nozzle more concentrated, thus improving the electrical breakdown phenomenon during the operation of the colloidal micro-propulsion device and further enhancing the stability and continuity of the jet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the independently controllable array colloidal micro-thruster based on induced jet provided in Embodiment 1 of the present invention;

[0022] Figure 2 yes Figure 1 An explosion diagram of an independently controllable array of colloidal micro-thrusters based on induced jetting;

[0023] Figure 3 yes Figure 1 A cross-sectional view of an independently controllable array of colloidal micro-thrusters based on induced jetting;

[0024] Figure 4This is an exploded schematic diagram of an independently controllable array-type colloidal micro-thruster based on induced jet provided in Embodiment 2 of the present invention;

[0025] Figure 5 This is a schematic diagram of the flow channel layer of an independently controllable array colloidal micro-thruster based on induced jetting, where (a) is a tree-like branching shape and (b) is a cavity shape;

[0026] Figure 6 This is a schematic diagram of the emitter of an independently controllable array-type colloidal micro-thruster based on induced jetting provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the extraction pole of an independently controllable array-type colloidal micro-propulsion device based on induced jetting.

[0028] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1-ink cartridge, 11-ink inlet, 12-ink outlet, 13-liquid reservoir, 14-support plate, 15-mounting hole, 16-positioning hole, 2-flow channel cover, 3-flow channel plate, 31-cavity layer, 32-nozzle channel layer, 4-emitter, 41-protruding nozzle, 42-jet electrode, 5-extraction electrode, 51-electrode ring, 52-conductive path, 6-accelerating electrode, 7-perforated glass, 8-insulating gasket, 9-insulating hydrophobic layer. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0030] This invention provides an independently controllable array-type colloidal micro-propeller based on induced jetting. The micro-propeller includes a cartridge, a flow channel plate, an emitter, an extractor, and an accelerator. The flow channel plate is disposed on the cartridge, and the emitter is disposed on the flow channel plate. The emitter, extractor, and accelerator are arranged sequentially at intervals. The emitter includes multiple protruding nozzles and a jetting electrode. The jetting electrode is plate-shaped and disposed on the flow channel plate, without contacting the solution contained in the cartridge. One end of each protruding nozzle passes through the jetting electrode and is disposed on the flow channel plate, communicating with the cartridge. The protruding nozzles are made of insulating material and are connected to the extractor and accelerator.

[0031] In this embodiment, multiple protruding nozzles are uniformly arranged around the central axis of the jet electrode to obtain a uniformly distributed electric field. The thrust of the arrayed colloidal micro-propeller is adjusted by activating different numbers of protruding nozzles. The protruding nozzles are designed to effectively increase the local electric field strength at the nozzle tip and prevent liquid from spreading outwards. Preferably, the protruding nozzles are made of insulating materials such as glass, ceramics, epoxy resin, or SU-8, and can be fabricated using processes such as 3D printing, laser ablation, sandblasting, and photolithography. The inner diameter of the protruding nozzles is 20–100 μm, the outer diameter is 50–130 μm, the protrusion height is 100–300 μm, and the nozzle spacing is 500–1500 μm. Multiple protruding nozzles form an array structure, and each protruding nozzle has the same structural dimensions.

[0032] The jet electrode has multiple square through holes for the protruding nozzle to pass through. The width of the square through holes is close to or equal to the outer diameter of the protruding nozzle to facilitate obtaining a higher electric field strength at the tip of the protruding nozzle. The jet electrode is made of conductive metal materials such as gold, copper, and aluminum, and is connected to the positive terminal of a high-voltage power supply to induce polarization of the liquid at the tip of the protruding nozzle.

[0033] The extraction electrode includes interconnected electrode rings and conductive paths, with one end of the conductive path extending to a portion and the other end extending to different electrode pins. The electrode rings are located above the protruding nozzles. The voltage applied by the electrode rings to the non-opening protruding nozzles is 500–800V higher than the voltage applied to the open protruding nozzles; the potential of each electrode ring is independently controllable.

[0034] The electrode ring has a width of 50–100 μm and an inner diameter 3–5 times larger than the outer diameter of the protruding nozzle to prevent the ejected liquid from accumulating on the extraction electrode. The conductive path has a width of 20–70 μm, with one end extending 0.6–1.2 mm and the other end extending to different electrode pins. When the colloidal micro-propeller is working, different numbers of nozzles are opened by applying different voltages to each electrode pin.

[0035] The extraction electrode is disposed on the perforated glass, and the jetting electrode is disposed on the flow channel plate. There are two processing methods: one is to use laser cutting to process stainless steel plates or custom flexible circuit boards; electrodes prepared by this method need to be bonded to the corresponding substrate surface for use. The other method is to pattern the metal electrode using processes such as photolithography and magnetron sputtering. This metal electrode includes an adhesion layer and a conductive layer. The adhesion layer is made of titanium or chromium and has a thickness of 20–35 nm; the conductive layer is made of gold or platinum and has a thickness of 100 nm–250 nm. An insulating gasket is provided between the ink cartridge and the perforated glass, and an insulating gasket is also provided between the perforated glass and the accelerating electrode. The flow channel plate and the jetting electrode are housed within the corresponding insulating gaskets.

[0036] The accelerating electrode is a hollow structure with a circular through-hole. The position of the circular hole corresponds to the position of the protruding nozzle, and its diameter should be 200-500 μm larger than the inner diameter of the extraction electrode to ensure that the spray beam passes through the accelerating electrode. The accelerating electrode is made of conductive metals such as copper and aluminum and can be fabricated using laser cutting technology.

[0037] The outer surfaces of the jet electrode, the extraction electrode, and the accelerating electrode need to be treated with insulation and hydrophobicity, with the hydrophobic layer placed outside the insulation layer. The insulation layer is prepared by spin-coating PI, SU-8, or depositing Parylene, which can effectively improve the system's high-voltage resistance. The hydrophobic layer, placed outside the insulation layer, can be prepared by spin-coating octadecylsilane or vapor-depositing Teflon.

[0038] The flow channel plate is made of glass, resin, or similar materials, with a thickness of 300–500 μm. It includes a cavity layer and a nozzle channel layer. The cavity layer is disposed on and connected to the ink cartridge. The cavity layer can be configured as a tree-like branching shape or a hollow cavity shape, depending on actual needs. The nozzle channel layer is disposed on and connected to the cavity layer. Multiple nozzles are vertically arranged within the nozzle channel layer, each corresponding to one of the protruding nozzles. In the hollow microchannel, the liquid storage cavity in the ink cartridge can replace the cavity layer, thus simplifying the manufacturing process. The consistency of the processing symmetry of the flow channel structure is crucial for controlling the meniscus of the protruding nozzles, and can be fabricated using processes such as 3D printing, sandblasting, and laser-induced deep etching.

[0039] The ink cartridge is made of insulating materials such as acrylic glass and PDMS, and is manufactured using methods such as 3D printing and machining. The ink cartridge is stepped, comprising a rectangular body and a support plate formed around one end of the rectangular body. One end of the rectangular body has a liquid storage chamber, and the other end has an ink inlet and an ink outlet, both of which are connected to the liquid storage chamber. The ink inlet is connected to an external flow supply system, and the ink outlet is used to discharge excess waste liquid. The liquid storage chamber is connected to the flow channel plate and is used to store propellant. The support plate has symmetrical mounting holes around its perimeter, where the micro-propeller is fixed using bolts. Positioning holes are provided at the four corners of the rectangular body. Insulating gaskets are placed between the positioning holes and the extraction and acceleration electrodes, and are connected by insulating bolts. The height of the extraction and acceleration electrodes can be adjusted by combining gaskets of different thicknesses.

[0040] Before operation, the colloidal micro-propeller must first remove all air bubbles from the system. At this point, both the inlet and outlet ports are open, allowing the solution to flow in through the inlet, filling the entire reservoir before exiting through the outlet into the waste bottle. During normal operation, the outlet port is closed, and the solution flows from the inlet into the flow channel plate, finally reaching the tip of the protruding nozzle. The same high voltage is applied to the ejection electrode, and different numbers of nozzles are opened by controlling the voltage applied to different electrode pins on the extraction electrode, thus completing the ejection of the colloidal micro-propeller. Specifically, applying a high voltage between the ejection electrode and the extraction electrode enhances the local electric field at the tip of the protruding nozzle, causing the highly polar solution to be accelerated through the accelerating electrode, thereby generating a reverse thrust.

[0041] The present invention will be further described in detail below with reference to specific embodiments.

[0042] Example 1

[0043] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The independently controllable array colloidal micro-propulsion device based on induced jetting provided in Embodiment 1 of the present invention includes an ink cartridge 1, a flow channel plate 3, an emitter 4, an extractor 5, an accelerator 6, a perforated glass 7, and two insulating gaskets 8. The flow channel plate 3 is disposed on the ink cartridge 1, the emitter 4 is disposed on the flow channel plate, and the extractor 5 is disposed on the perforated glass 7. The insulating gasket 8 is a rectangular frame disposed on the ink cartridge 1, and the perforated glass 7 is disposed on the insulating gasket 8. The flow channel plate 3 and the emitter 4 are disposed within the rectangular receiving cavity formed by the insulating gasket 8. Another insulating gasket 8 is disposed on the perforated glass 7, and the accelerator 6 is disposed on the corresponding insulating gasket 8. Thus, the emitter 4, the extractor 5, and the accelerator 6 are spaced apart from bottom to top, and the emitter 4 is connected to the ink cartridge 1. The emitter 4 is sequentially connected to the extractor 5 and the accelerator 7.

[0044] The ink cartridge 1 is stepped, comprising a rectangular body and a support plate 14 formed on the outer periphery of one end of the rectangular body. One end of the rectangular body has a liquid storage cavity 13, and the other end has an ink inlet 11 and an ink outlet 12, both of which are connected to the liquid storage cavity 13. The support plate 14 has multiple mounting holes 15, at which the micro-propeller is fixed by bolts. The end of the rectangular body away from the support plate 14 has multiple positioning holes 16 for easy positioning during installation.

[0045] The flow channel plate 3 includes a cavity layer 31 disposed on the rectangular body and a nozzle channel layer 32 disposed on the cavity layer 31. The cavity layer 31 is connected to the liquid storage cavity 13. The cavity layer 31 is hollow and is directly replaced by the liquid storage cavity 13 in the ink cartridge 1, simplifying the manufacturing process. Multiple nozzles communicating with the liquid storage cavity 13 are vertically disposed within the nozzle channel layer 32, and the positions of the multiple nozzles correspond to the multiple protruding nozzles of the emitter 4.

[0046] The emitter 4 includes a protruding nozzle 41 and a jet electrode 42. The jet electrode 42 is plate-shaped, and one end of the protruding nozzle 41 passes through the jet electrode 42 and is connected to the flow channel plate. An insulating hydrophobic layer 9 is provided on the outer surface of the jet electrode 42, the extraction electrode 5, and the acceleration electrode 6.

[0047] The extraction electrode 5 includes an independently controllable electrode ring 51 and a conductive path 52 connected to the electrode ring 51. The position of the electrode ring 51 corresponds to the position of the protruding nozzle 41.

[0048] In this embodiment, the ink cartridge 1 is machined from plexiglass, possessing certain insulation and corrosion resistance properties to meet the operational requirements of the colloidal micro-propeller. The nozzles of the nozzle channel layer 32 are prepared using laser-induced deep etching, with a nozzle diameter of 30 μm and a length of 300 μm. The rectangular through-holes of the jet electrode 42 have a width of 70 μm and are patterned by magnetron sputtering. The adhesion layer is titanium with a thickness of 25 nm, and the conductive layer is gold with a thickness of 200 nm. A photolithographic SU-8 layer is spin-coated on top of the jet electrode 42 as an insulating layer. The protruding nozzles 41 are prepared by photolithographic SU-8 dry film, resulting in a highly consistent array structure. The protruding nozzles 41 have an inner diameter of 30 μm, an outer diameter of 60 μm, a protrusion height of 100 μm, and a nozzle spacing of 500 μm. The extractor 5 is based on a 200μm thick glass plate and is prepared using the same method as the jet electrode 42. The electrode rings 51 have an inner diameter of 200μm and a spacing of 500μm. The accelerator 6 is made by laser cutting a 100μm thick stainless steel plate, with a circular through-hole having an inner diameter of 400μm. SU8 is spin-coated onto both the extractor 5 and the accelerator 6 as an insulating layer. Teflon is vapor-deposited onto the outer surfaces of the jet electrode 42, extractor 5, and accelerator 6 to complete the hydrophobic layer preparation. The thickness of the insulating gasket 8 is selected as needed. Under a microscope, the relative positions of the emitter 4, extractor 5, and accelerator 6 are adjusted, and the bolts are tightened to complete the alignment and assembly.

[0049] Example 2

[0050] Please see Figure 4 and Figure 5The independently controllable array colloidal micro-propulsion device based on induced jet provided in Embodiment 2 of the present invention is basically the same as the independently controllable array colloidal micro-propulsion device based on induced jet provided in Embodiment 1 of the present invention. The main difference is that the independently controllable array colloidal micro-propulsion device based on induced jet provided in Embodiment 2 of the present invention also includes a flow channel cover plate 2 and a flow channel plate 3. The cavity layer 31 is tree-shaped and branched.

[0051] The ink cartridge 1, flow channel cover 2, flow channel plate 3, and protruding nozzle 41 of the micro-propeller are all integrally manufactured by 3D printing technology. The added flow channel cover 2 plays a sealing role for the tree-like branched micro-flow channel plate and is located between the ink cartridge 1 and the flow channel plate 3.

[0052] The tree-like branched microchannels inside the flow channel plate 3 have a width of 120 μm and a depth of 300 μm. The nozzle channel layer 32 has nozzles with a diameter of 60 μm and a length of 150 μm. The protruding nozzle 41 has an inner diameter of 60 μm, an outer diameter of 150 μm, a protrusion height of 200 μm, and a nozzle spacing of 1 mm. The jet electrode 42 is made of laser-cut stainless steel plate with a square through-hole width of 250 μm, and is attached to the bottom of the protruding nozzle 41 with epoxy resin adhesive. PI is spin-coated on top of the jet electrode 42 as an insulating layer. The extraction electrode 5 consists of a 100 μm thick glass sheet and a custom flexible circuit board, bonded together with insulating double-sided adhesive. The electrode rings 51 of the extraction electrode 5 have an inner diameter of 500 μm and a spacing of 1 mm. The accelerating electrode 6 has a circular through-hole with an inner diameter of 800 μm, is made of a 100 μm thick stainless steel plate laser-cut, and has PI spin-coated on it as an insulating layer. Hydrophobic layers for emitter 4, extractor 5, and accelerator 6 are prepared by vapor deposition of Teflon material. The thickness of the insulating gasket 8 is selected as needed. The relative positions of emitter 4, extractor 5, and accelerator 6 are adjusted under a microscope, and the bolts are tightened to complete the alignment and assembly.

[0053] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An independently controllable array-type colloidal micro-thruster based on induced jetting, characterized in that: The micro-jet actuator includes an ink cartridge, a flow channel plate disposed on the ink cartridge, and an emitter disposed on the flow channel plate. The emitter includes a protruding nozzle and a jet electrode. The jet electrode is plate-shaped and disposed on the flow channel plate. One end of the protruding nozzle passes through the jet electrode and is disposed on the flow channel plate, and is connected to the ink cartridge through the flow channel plate. The jet electrode is not connected to the ink cartridge. The protruding nozzle is made of insulating material; The micro-thruster also includes an extraction electrode disposed on the perforated glass, which includes multiple independently controllable electrode rings and conductive paths connected to the electrode rings. The positions of the multiple electrode rings correspond to the positions of the multiple protruding nozzles. The micro-thruster also includes an accelerating electrode, and the jet electrode, the extraction electrode, and the accelerating electrode are arranged sequentially at intervals and connected to each other.

2. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 1, characterized in that: The plurality of protruding nozzles are arranged in an array, and the plurality of protruding nozzles are evenly distributed around the central axis of the jet electrode.

3. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 1, characterized in that: The inner diameter of the electrode ring is 3 to 5 times larger than the outer diameter of the protruding nozzle.

4. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 1, characterized in that: Insulating gaskets are provided between the perforated glass and the ink cartridge, and between the accelerating electrode and the perforated glass, respectively. The insulating gaskets are rectangular frames.

5. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 4, characterized in that: The flow channel plate and the jet electrode are housed within the insulating pad.

6. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 3, characterized in that: The accelerating electrode has multiple circular through holes, and the positions of the multiple circular through holes correspond to the positions of the multiple protruding nozzles.

7. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in claim 6, characterized in that: The inner diameter of the circular through hole is 200μm to 500μm larger than the inner diameter of the electrode ring.

8. The independently controllable array-type colloidal micro-thruster based on induced jetting as described in any one of claims 1-7, characterized in that: The flow channel plate includes a cavity layer and a nozzle channel layer. The cavity layer is disposed on the ink cartridge and is connected to the ink cartridge. The nozzle channel layer is disposed on the cavity layer and is connected to the cavity layer. Multiple nozzles are vertically disposed in the nozzle channel layer, and the multiple nozzles correspond one-to-one with the multiple protruding nozzles.

Images