Pulse jet propeller based on polyvinyl chloride electroactive gel material driving

Abstract

The invention discloses a pulse jet-flow propeller based on polyvinyl chloride electroactive gel material driving, and belongs to the technical field of jet-flow propelling. The propeller comprises a shell and a retractable cabin arranged in the shell, one-way diaphragm pumps communicated with the retractable cabin are arranged at the head end and the tail end of the shell, and water flow is controlled to enter from the head end and be sprayed out from the tail end; clamping plate type driving modules are arranged on the two sides of the retractable cabin body, normal clamping force is applied to the wall faces of the two sides of the retractable cabin body to compress the retractable cabin body, fluid in the cabin body is extruded and sprayed out, and the pulse jet propulsion action is completed. The squid-imitated underwater robot realizes squid-imitated water absorbing and spraying actions, and can complete flexible underwater movement and direction adjustment under low energy consumption.

Description

Technical Field

[0001] The invention belongs to the technical field of jet propulsion, and in particular relates to a pulse jet propulsor driven by a polyvinyl chloride electroactive gel material. Background Art

[0002] In the field of jet propulsion technology for underwater vehicles, researchers around the world have developed two main types of bionic jet thrusters. The first type is a purely mechanical structure that combines power devices such as motors to provide high speed and propulsion, but it produces large vibrations and noise, and has poor bio-affinity and concealment. For example, the mechanical fish developed by the University of California, San Diego, uses this design. The second type of thruster is driven by smart materials, and its flexibility of movement has advantages in specific application scenarios, but is limited in propulsion efficiency and load capacity.

[0003] With the rapid development of bionics, robotics, fluid mechanics, materials science and automatic control theory, researchers have turned their attention to organisms that live in water for a long time, hoping to gain inspiration for new underwater propulsion methods. In recent years, many bionic propulsion devices have been developed to improve underwater navigation performance and environmental adaptability. Summary of the invention

[0004] Technical issues to be solved:

[0005] In order to avoid the shortcomings of the prior art, the present invention provides a pulse jet thruster driven by a polyvinyl chloride electroactive gel material, which squeezes a retractable cabin through a splint-type driving module and combines the rebound characteristics of the retractable cabin to achieve a squid-like water-absorbing and water-spraying action, and can complete low-noise, highly concealed, flexible underwater movement and direction adjustment with low energy consumption.

[0006] The technical solution of the present invention is: a pulse jet propulsion device driven by polyvinyl chloride electroactive gel material, comprising a shell and a retractable cabin arranged therein, wherein the head / tail end of the shell are provided with a one-way diaphragm pump connected to the retractable cabin, controlling the water flow to enter from the head end and to be ejected from the tail end; splint-type driving modules are provided on both sides of the retractable cabin, which compress the walls on both sides of the retractable cabin by applying a normal clamping force to the walls to squeeze the fluid in the cabin and eject it to complete the pulse jet propulsion action.

[0007] A further technical solution of the present invention is: the retractable cabin has planar structures on both sides symmetrical with respect to the central symmetry plane of the propeller, and the cross-section parallel to the central symmetry plane of the propeller is nearly elliptical; a one-way diaphragm pump mounting hole is opened at its head / tail end along the central axis; an elastic component is provided along its inner edge in a direction perpendicular to the central symmetry plane, and the two ends of the elastic component are respectively connected to the inner walls of the planar structure on both sides to apply elastic restoring force to the compressed wall surface.

[0008] A further technical solution of the present invention is: the material of the retractable cabin is silicone, and its cross-sectional contour line parallel to the central symmetry plane of the propeller is a NACA0020 line shape.

[0009] A further technical solution of the present invention is that the elastic component includes two compression springs arranged in parallel.

[0010] A further technical solution of the present invention is: the one-way diaphragm pump includes a DF-M65 diaphragm pressure-free one-way valve installed at the head end of the thruster and a DF-X65V mini spring-type one-way valve installed at the tail end. When the retractable cabin sucks / discharges fluid, a pressure difference is generated between the inlet / outlet of the one-way diaphragm pump at the head end and the one-way diaphragm pump at the tail end, so that the fluid enters the retractable cabin from the one-way diaphragm pump at the head end and is discharged from the retractable cabin from the one-way diaphragm pump at the tail end.

[0011] A further technical solution of the present invention is: the clamping plate type driving module comprises two sets of driving components symmetrically arranged on both sides of the retractable cabin, and the driving components comprise a reversing connecting rod and a polyvinyl chloride electroactive gel material driver hinged at both ends thereof;

[0012] The reversing connecting rod comprises a bottom rod and two symmetrical connecting rods hinged to the central protrusion thereof, the free ends of the two connecting rods are respectively hinged to the polyvinyl chloride electroactive gel material drivers at both ends; the bottom rod is connected to the side wall of the retractable cabin through a thin plate, and its axial direction is perpendicular to the side wall of the retractable cabin;

[0013] The polyvinyl chloride electroactive gel material driver is formed by staggered stacking of copper mesh and polyvinyl chloride gel material, and the stacking direction is consistent with the navigation direction of the propeller. A 1Hz pulse voltage is applied for pulse power supply to cause it to expand and contract as a whole. The displacement generated by the expansion and contraction drives the two connecting rods to rotate around the protrusion of the bottom rod, and then drives the thin plate to extrude the retractable cabin in the normal direction through the bottom rod.

[0014] A further technical solution of the present invention is that the plate surface profile of the thin plate is consistent with the plane structural profile of the side wall of the retractable cabin, and is a carbon fiber plate with a thickness of 0.75 mm.

[0015] A further technical solution of the present invention is: the shell is coated on the outer surface of the splint-type drive module and the retractable cabin, and is a linear rotating body structure converted from the NACA0020 line; the through hole for installing the tail-end one-way diaphragm pump extends outwardly into a trumpet-shaped structure to increase the thrust generated by the jet; a fin-shaped structure is arranged on the periphery to increase the streamline and stability of the propeller.

[0016] A further technical solution of the present invention is that the shell is formed by 3D printing using polylactic acid (PLA) material.

[0017] A propulsion method of a pulse jet thruster driven by polyvinyl chloride electroactive gel material, the specific steps are as follows:

[0018] Adjust the one-way diaphragm pump pressure difference at the front and rear ends of the shell;

[0019] The fluid is introduced into the retractable cabin through the one-way diaphragm pump at the head end, and the retractable cabin expands;

[0020] A 1 Hz pulse voltage is supplied to the polyvinyl chloride electroactive gel material driver of the splint-type driving module for pulse power supply, so that the polyvinyl chloride electroactive gel material driver expands and drives the reversing connecting rod located in the middle to move in the direction of the retractable cabin;

[0021] The reversing connecting rods on both sides drive the thin plate to squeeze the retractable cabin, and the fluid in the retractable cabin is ejected out of the outer shell from the one-way diaphragm pump at the tail end, and the thrust generated by the jet completes the propulsion of the thruster.

[0022] Beneficial Effects

[0023] The beneficial effects of the present invention are as follows: the present invention squeezes the retractable cabin through the splint-type driving module, squeezes the fluid in the cabin and sprays it out of the outer shell; and quickly restores to a normal state through the elastic components in the retractable cabin to enter the next round of jet action.

[0024] Preferably, the splint-type drive module is a driver based on polyvinyl chloride electroactive gel material, which provides the possibility of realizing efficient and lightweight underwater propulsion by virtue of its excellent deformation ability, high stress output and fast response characteristics. The pulse jet propulsion device based on polyvinyl chloride electroactive gel material driver has the advantages of ultra-quiet and good bioaffinity, and has a lower driving voltage than other new driving materials (such as the driving voltage required for dielectric elastomer de materials is 2000V), and the required driving voltage is 200V. The propeller shows a nearly silent characteristic during operation, and its noise level is extremely low compared to similar products driven by machinery, showing good biocompatibility and environmental friendliness. By flexibly adjusting the frequency of the output voltage, the driving frequency of the propeller can also be accurately controlled, and then its travel speed is adjusted to meet the speed requirements under different application scenarios.

[0025] The present invention adopts a one-way valve device to ensure the one-way flow of the fluid, that is, from the head to the tail of the thruster. This design significantly improves the propulsion efficiency and enhances the reliability of the system.

[0026] The thruster of the present invention can help submarines perform tasks without being detected by the opponent's sonar, thus gaining tactical advantages; in terms of marine biological observation, the thruster has good biological affinity and can be integrated into the fish school to the greatest extent to obtain real observation data; in terms of underwater archaeological applications, the thruster can reduce environmental interference and play an important role in protecting underwater cultural relics. With the further development and improvement of technology, this thruster is expected to play a more important role in future underwater operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a general schematic diagram of a pulse jet propulsor driven by polyvinyl chloride electroactive gel material according to the present invention;

[0028] Figure 2 It is a partial schematic diagram of a one-way diaphragm pump;

[0029] Figure 3 It is a schematic diagram of the silicone retractable cabin part;

[0030] Figure 4 It is a schematic diagram of a portion of a polyvinyl chloride electroactive gel material actuator;

[0031] Figure 5 It is a schematic diagram of the reversing connecting rod part;

[0032] Figure 6 It is a schematic diagram of the structure of the thin plate;

[0033] Figure 7 It is a schematic diagram of the structure supporting the encapsulated shell.

[0034] Explanation of the reference numerals: 1- one-way diaphragm pump, 101- one-way valve inlet, 102- one-way acting valve, 103- one-way valve outlet, 2- retractable cabin, 201- compression spring, 202- head end one-way diaphragm pump mounting hole, 203- tail end one-way diaphragm pump mounting hole, 3- polyvinyl chloride electroactive gel material driver, 301- lug, 4- reversing connecting rod, 401- connecting rod, 402- bottom rod, 5- thin plate, 501- bottom rod mounting hole, 6- shell, 601- round hole, 602- fin-shaped structure, 603- trumpet-shaped structure. DETAILED DESCRIPTION

[0035] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In view of the problems of high noise and poor concealment of existing bionic thrusters, the present invention provides a pulse jet thruster driven by polyvinyl chloride electroactive gel material, comprising a shell and a retractable cabin arranged therein, the head / tail ends of the shell are both provided with a one-way diaphragm pump connected to the retractable cabin, so as to control the water flow to enter from the head end and spray out from the tail end; splint-type driving modules are provided on both sides of the retractable cabin, which compress the walls on both sides of the retractable cabin by applying a normal clamping force to the walls to squeeze the fluid in the cabin and spray it out to complete the pulse jet propulsion action.

[0038] Specifically, the retractable cabin has planar structures on both sides symmetrical with respect to the central symmetry plane of the propeller, and the cross-section parallel to the central symmetry plane of the propeller is nearly elliptical; a one-way diaphragm pump mounting hole is opened at its head / tail end along the central axis; an elastic component is provided along its inner edge in a direction perpendicular to the central symmetry plane, and the two ends of the elastic component are respectively connected to the inner walls of the planar structures on both sides, exerting an elastic restoring force on the compressed wall surface.

[0039] Specifically, the splint-type driving module includes two groups of driving components symmetrically arranged on both sides of the retractable cabin, and the driving components include a reversing connecting rod and a polyvinyl chloride electroactive gel material driver hinged at both ends thereof; the reversing connecting rod includes a bottom rod and two symmetrical connecting rods hinged at the central protrusion thereof, and the free ends of the two connecting rods are respectively hinged to the polyvinyl chloride electroactive gel material drivers at both ends; the bottom rod is connected to the side wall of the retractable cabin through a thin plate, and its axial direction is perpendicular to the side wall of the retractable cabin; the polyvinyl chloride electroactive gel material driver is formed by staggered stacking of copper mesh and polyvinyl chloride gel material, and the stacking direction is consistent with the navigation direction of the propeller. A 1Hz pulse voltage is applied for pulse power supply to make it expand and contract as a whole, and the displacement generated by the expansion and contraction drives the two connecting rods to rotate around the protrusion of the bottom rod, and then drives the thin plate to extrude the retractable cabin along the normal direction through the bottom rod.

[0040] The present invention provides a propulsion method of a pulse jet thruster driven by a polyvinyl chloride electroactive gel material, and the specific steps are as follows:

[0041] Step 1: Adjust the pressure difference of the one-way diaphragm pump at the front and rear ends of the shell;

[0042] Step 2: introducing fluid into the retractable cabin through the head-end one-way diaphragm pump, and the retractable cabin expands;

[0043] Step 3: A 1 Hz pulse voltage is supplied to the polyvinyl chloride electroactive gel material driver of the splint-type driving module for pulse power supply, so that the polyvinyl chloride electroactive gel material driver expands and drives the reversing connecting rod in the middle to move in the direction of the retractable cabin;

[0044] Step 4: The reversing connecting rods on both sides drive the thin plate to squeeze the retractable cabin, and the fluid in the retractable cabin is ejected out of the outer shell from the tail end one-way diaphragm pump, and the thrust generated by the jet completes the propulsion of the thruster.

[0045] The above technical solution is further described below in conjunction with the accompanying drawings:

[0046] In one embodiment, referring to Figure 1 As shown, a pulse jet thruster driven by polyvinyl chloride electroactive gel material comprises:

[0047] The one-way diaphragm pump part 1 is arranged at the head and tail of the propulsion device and is used to limit the one-way flow of the fluid inside the propulsion device;

[0048] Preferably, the one-way diaphragm pump 1 is composed of two one-way valves, the head is loaded with a DF-M65 diaphragm pressure-free one-way valve, and the tail is loaded with a DF-X65V mini spring one-way valve; there is a pressure difference between the one-way diaphragm pumps at the head and tail ends, so that the fluid can more easily enter the 101 cabin, which meets the driving characteristics of the polyvinyl chloride electroactive gel material driver.

[0049] Preferably, refer to Figure 2 As shown, the one-way diaphragm pump 1 comprises a one-way valve inlet 101 and a one-way valve outlet 103 , and a one-way acting valve connected between the inlet and the outlet.

[0050] The collapsible cabin 2 is used to carry the fluid inside the propulsion device;

[0051] Preferably, the retractable cabin 2 is made of BESHOW SKIN 10 professional special effect silicone, which has high physical properties and is the best silicone for making human and animal skin. The unique strong stretchability and high recovery are suitable for making various mechanical strong stretching actions. The interior of the cabin is supported by two short springs to ensure that the cabin can rebound in time. The entire cabin adopts NACA0020 linear modification. Figure 3As shown, the structure is flat on the left and right and convex on the top and bottom, which is convenient for the device to compress. The compression of this shape is 30% higher than that of a rectangular structure of the same volume under the same stress. There are circular holes at the head and tail of the cabin, so that the silicone shrinkable cabin and the one-way diaphragm valve can be transitionally matched. Two rigid thin plates are set on both sides of the silicone shrinkable cabin.

[0052] Polyvinyl chloride electroactive gel material actuator part 3, reference Figure 4 As shown, it is arranged at the four corners of both sides of the silicone retractable cabin to provide driving force;

[0053] Preferably, the polyvinyl chloride electroactive gel material driver is formed by stacking polyvinyl chloride gel material and copper mesh. Polyvinyl chloride (PVC) gel material is an intelligent material with electroactivity, which can deform and deform under the action of an external electric field. The theoretical basis of this material is the electrodeformation effect of electroactive polymers, that is, under the action of an electric field, the molecules inside the polymer will be rearranged and reorganized, thereby causing the deformation of the material. The polyvinyl chloride electroactive gel material driver is composed of a staggered stack of copper mesh and polyvinyl chloride material, and the stacking method is arranged along the direction of propeller movement. This arrangement can reduce the resistance encountered by the device when it is heading in the water;

[0054] Reversing connecting rod 4, refer to Figure 5 As shown, it includes a bottom rod 402 and two symmetrical connecting rods 401 hinged to its central protrusion, and the free ends of the two connecting rods 401 are respectively hinged to the lugs 301 at the inner ends of the polyvinyl chloride electroactive gel material drivers at both ends; it is used to convert the lateral force generated by the polyvinyl chloride electroactive gel material driver 3 into a longitudinal force, that is, the normal of the wall surfaces on both sides of the retractable cabin 2.

[0055] The thin plate 5 is used to increase the force-bearing area of ​​the shrinkable cavity of the compressed silica gel; Figure 6 As shown, a through hole is opened at the center thereof for mounting the bottom protrusion of the bottom rod 402 .

[0056] The supporting and wrapping shell 6 is used to fix and wrap the polyvinyl chloride electroactive gel material driver, the reversing connecting rod, the thin plate and the silicone retractable cabin. There are circular holes 601 at the head and tail. The supporting and wrapping shell can cooperate with the one-way diaphragm valve. The fin-shaped structure 602 is symmetrically arranged under the cabin to maintain the stability of the aircraft. The closed structure can waterproof the internal structure.

[0057] As a preferred embodiment, the polyvinyl chloride electroactive gel material driver 3 is symmetrically supported and wrapped in the shell and the inner sections are distributed on both sides of the propeller, and the lug 301 arranged at the inner end is hinged to the free end of the connecting rod 401 of the reversing connecting rod 4; the outer surface of the polyvinyl chloride electroactive gel material driver 3 is fitted with the supporting and wrapping shell 6 to achieve a precise combination of the various parts.

[0058] As a preferred embodiment, the one-way diaphragm pump 1 has the same direction, and controls the internal flow direction of the fluid to be head - cabin - tail.

[0059] As a preferred embodiment, the supporting and wrapping shell 6 is a linear rotating body structure converted from NACA0020 linearly. Compared with a rectangular parallelepiped with the same mass and volume, the resistance of changing the fluid linear structure is reduced by 50%. It is precisely wrapped with the polyvinyl chloride electroactive gel material driver 3 and the silicone shrinkable cabin 5 of the internal device, so that the silicone shrinkable cabin is in a normal state when not powered on.

[0060] As a preferred embodiment, the thin plate 5 has a thickness of 0.75 mm and a shape identical to the planar structure on both sides of the silicone shrinkable cabin. The material selected is a carbon fiber plate, which has the advantages of high strength and high modulus.

[0061] As a preferred embodiment, the thin plate 5 has a square hole 501 in the middle to cooperate with the bottom rod 402 of the reversing connecting rod part.

[0062] Further preferably, the reversing connecting rod 4 uses a metal connecting rod 401 to connect the polyvinyl chloride electroactive gel material driver 3, and the lower bottom rod 402 is connected to the thin plate 501. When the polyvinyl chloride driver moves back and forth, the connecting rod movement will change the movement direction to the normal direction of the thin plate to squeeze the silicone retractable cabin 2.

[0063] As a preferred embodiment, the polyvinyl chloride electroactive gel material driver 3 is formed by continuously stacking a layer of thin copper mesh and a layer of polyvinyl chloride.

[0064] As a preferred embodiment, the polyvinyl chloride electroactive gel material driver 3 is pulse-powered by a 1 Hz pulse voltage to make it expand and contract as a whole, thereby indirectly providing a compressive displacement for the compressible cavity.

[0065] As a preferred embodiment, the supporting wrapping shell 6 is formed by 3D printing using polylactic acid (PLA) material.

[0066] Further preferably, the tail of the supporting and wrapping shell 6 is designed as a trumpet-shaped structure 603, which can increase the thrust generated by the jet; fin-shaped structures 602 are designed on the upper and lower sides to increase the streamlined and stable performance of the device.

[0067] Preferably, the silicone shrinkable cabin 2 is cast by BESHOW SKIN 10 professional special effect silicone. First, a model is 3D printed, and a corresponding shape is cast by silicone. The silicone cabin is bonded by adhesive, and a spring 201 bonded with silicone is attached inside to support the silicone cabin.

[0068] Further preferably, the silicone shrinkable cabin 2 has a silicone casting thickness of 2 mm, which allows the silicone cabin to have certain elasticity and toughness.

[0069] The thruster compressible cabin of the present invention is designed to ensure streamlined shape, effectively reducing the resistance during navigation and the energy consumption of the driver during navigation; the design adopts a new driver and voltage drive, which effectively increases the energy utilization rate. A pulse voltage with a frequency of 1Hz is used for pulse power supply. The driver is arranged in an axisymmetric distribution in the design, so that the thruster maintains good stability during movement.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A pulse jet propulsor driven by polyvinyl chloride electroactive gel material, characterized in that: It includes a shell and a retractable cabin arranged therein, wherein the head / tail end of the shell are provided with a one-way diaphragm pump connected to the retractable cabin, so as to control the water flow to enter from the head end and spray out from the tail end; splint-type driving modules are provided on both sides of the retractable cabin, which compress the walls of both sides of the retractable cabin by applying a normal clamping force to the walls to squeeze the fluid in the cabin and spray it out to complete the pulse jet propulsion action.

2. According to claim 1, a pulse jet propulsor driven by polyvinyl chloride electroactive gel material, characterized in that: The retractable cabin has planar structures on both sides symmetrical with respect to the central symmetry plane of the propeller, and the cross-section parallel to the central symmetry plane of the propeller is nearly elliptical; a one-way diaphragm pump mounting hole is opened at its head / tail end along the central axis; an elastic component is provided along its inner edge in a direction perpendicular to the central symmetry plane, and the two ends of the elastic component are respectively connected to the inner walls of the planar structure on both sides to apply an elastic restoring force to the compressed wall surface.

3. The pulse jet propulsion device driven by polyvinyl chloride electroactive gel material according to claim 2, characterized in that: The retractable cabin is made of silicone, and its cross-sectional contour line parallel to the central symmetry plane of the propeller is a NACA0020 line shape.

4. The pulse jet propulsor driven by polyvinyl chloride electroactive gel material according to claim 2, characterized in that: The elastic component includes two compression springs arranged in parallel.

5. The pulse jet propulsor driven by polyvinyl chloride electroactive gel material according to claim 1, characterized in that: The one-way diaphragm pump includes a DF-M65 diaphragm pressure-free one-way valve installed at the head end of the thruster and a DF-X65V mini spring-loaded one-way valve installed at the tail end; when the retractable cabin sucks / discharges fluid, a pressure difference is generated between the inlet / outlet of the one-way diaphragm pump at the head end and the one-way diaphragm pump at the tail end, so that the fluid enters the retractable cabin from the one-way diaphragm pump at the head end and is discharged from the retractable cabin from the one-way diaphragm pump at the tail end.

6. The pulse jet propulsion device driven by polyvinyl chloride electroactive gel material according to claim 1, characterized in that: The clamping plate type driving module comprises two sets of driving components symmetrically arranged on both sides of the retractable cabin, and the driving components comprise a reversing connecting rod and a polyvinyl chloride electroactive gel material driver hinged at both ends thereof; The reversing connecting rod comprises a bottom rod and two symmetrical connecting rods hinged to the central protrusion thereof, the free ends of the two connecting rods are respectively hinged to the polyvinyl chloride electroactive gel material drivers at both ends; the bottom rod is connected to the side wall of the retractable cabin through a thin plate, and its axial direction is perpendicular to the side wall of the retractable cabin; The polyvinyl chloride electroactive gel material driver is formed by staggered stacking of copper mesh and polyvinyl chloride gel material, and the stacking direction is consistent with the navigation direction of the propeller. A 1Hz pulse voltage is applied for pulse power supply to cause it to expand and contract as a whole. The displacement generated by the expansion and contraction drives the two connecting rods to rotate around the protrusion of the bottom rod, and then drives the thin plate to extrude the retractable cabin in the normal direction through the bottom rod.

7. The pulse jet propulsion device driven by polyvinyl chloride electroactive gel material according to claim 6, characterized in that: The plate surface profile of the thin plate is consistent with the plane structural profile of the side wall of the retractable cabin, and is a carbon fiber plate with a thickness of 0.75 mm.

8. The pulse jet propulsor driven by polyvinyl chloride electroactive gel material according to claim 1, characterized in that: The shell is coated on the outer surface of the clamping plate drive module and the retractable cabin, and is a linear rotating body structure converted from the NACA0020 line; The through hole for installing the tail-end one-way diaphragm pump extends outwardly into a trumpet-shaped structure to increase the thrust generated by the jet; a fin-shaped structure is arranged on the periphery to increase the streamline and stability of the propeller.

9. The pulse jet propulsion device driven by polyvinyl chloride electroactive gel material according to claim 8, characterized in that: The shell is formed by 3D printing using polylactic acid (PLA) material.

10. A propulsion method for a pulse jet propulsor driven by a polyvinyl chloride electroactive gel material according to any one of claims 1 to 9, characterized in that The specific steps are as follows: Adjust the one-way diaphragm pump pressure difference at the front and rear ends of the shell; The fluid is introduced into the retractable cabin through the one-way diaphragm pump at the head end, and the retractable cabin expands; A 1 Hz pulse voltage is supplied to the polyvinyl chloride electroactive gel material driver of the splint-type driving module for pulse power supply, so that the polyvinyl chloride electroactive gel material driver expands and drives the reversing connecting rod located in the middle to move in the direction of the retractable cabin; The reversing connecting rods on both sides drive the thin plate to squeeze the retractable cabin, and the fluid in the retractable cabin is ejected out of the outer shell from the one-way diaphragm pump at the tail end, and the thrust generated by the jet completes the propulsion of the thruster.

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