71 results about "Suction surface" patented technology

The present disclosure relates to an axial flow fan blade, a fan assembly, an air conditioner outdoor unit and an air conditioner. The axial flow fan blade comprises a hub and a plurality of blades arranged on the outer side of the hub, each blade comprising a pressure surface and a suction surface arranged oppositely, each blade comprising a blade inner edge and a blade outer edge arranged oppositely, and each blade further comprising a blade leading edge and a blade trailing edge arranged oppositely. Each blade is divided into a first region, a second region and a third region in a circumferential direction. The first included angle of the first region, the second included angle of the second region and the third included angle of the third region are selected to be in a ratio of 1:1.25-1.9:1.25-1.9.

This invention discloses a gantry-type stacking robot for mold steel storage, relating to the field of automated storage robot technology. It includes a fine-tuning device mounted on the bottom surface of a rotating device; a horizontal plate mounted on the bottom surface of the fine-tuning device; a bidirectional adjustment component mounted on the bottom surface of the horizontal plate; and magnetic suction components for aligning plates mounted on both sides of the bottom surface of the bidirectional adjustment component, respectively, at the center of the bottom surface of the horizontal plate. A trigger mechanism is mounted on the drive shaft of the magnetic suction component, with its end slidably connected in a groove. An air blowing mechanism is rotatably mounted on the bottom of the aligning plate. The air blowing mechanism is driven by the linkage between the trigger mechanism and the magnetic suction component's lifting and lowering mechanism, enabling aligning, suction, and cleaning actions. Combined with a rotatable air wheel and a flat air nozzle, it specifically removes iron filings, dust, and other fine impurities from the aligning and electromagnetic suction surfaces of the mold steel, preventing wear and uneven stacking caused by residual impurities.

This application relates to the field of impeller structure optimization technology, and particularly to a high-speed centrifugal fan and its impeller structure optimization method. The high-speed centrifugal fan includes a main shaft, an impeller, a thin-film pressure sensing layer, a surface protective coating, a flexible circuit adapter belt, and a slip ring actuator. The impeller includes a disc and multiple blades. The thin-film pressure sensing layer is attached to the surface of at least one blade. The surface protective coating covers the outside of the thin-film pressure sensing layer, and the thickness of the surface protective coating is uniform while the surface profile of the blade remains unchanged. The flexible circuit adapter belt extends along the blade surface to the edge of the disc and is communicatively connected to the thin-film pressure sensing layer. The slip ring actuator is mounted on the main shaft and is electrically connected to the end of the flexible circuit adapter belt to transmit pressure signals under rotational conditions. This method can solve the problem of the mismatch between the starting position and range of flow separation on the blade suction surface and the design expectation.

A SCARA robot for transporting cargo comprises a head unit for adsorbing cargo and an arm unit coupled to the head unit and having one or more joints to pull and move the adsorbed cargo in a first direction. The head unit comprises a suction module having one or more suction pads that contact and adsorb the suction surface of the cargo, a first head body connected to the suction module in a spaced-apart manner along a first direction, and a second head body coupled to the first head body and the arm unit between the first head body and the arm unit. The suction module is adjustable in terms of the spacing distance relative to the first head body, the left-right positioning angle relative to the first head body, or the height relative to the second head body.

The invention relates to a device (10) for handling articles, comprising a vacuum-operated gripping device (16) for suction gripping the articles, and a cleaning device (36) which can cooperate with the gripping device (16) to remove impurities present in or on it. Furthermore, the invention relates to a method for regenerating a suction surface (18) and / or air-conducting sections (32) of a gripping device (16), which comprises a movably suspended, plate-like suction cup that can be subjected to a vacuum over its entire surface in order to suction and grip a plurality of articles on its underside by drawing them against an air-permeable elastic layer (26) when suction pressure is applied. The method includes a cleaning process in which contaminants and / or deposits are removed at least from the elastic layer (26) and / or from the air-conducting sections (32) of the gripping device (16).

This invention relates to the field of centripetal impeller aerodynamic design technology, specifically to a hub structure and design method suitable for centripetal impellers with a large expansion ratio. A hub structure suitable for centripetal impellers with a large expansion ratio includes: a hub body, with multiple blades on its surface. Each blade has a suction surface and a pressure surface. Along the flow direction of the gas in the centripetal impeller, the hub body has a recessed structure on one side corresponding to the suction surface of the blades, while the hub body has a flat structure on one side corresponding to the pressure surface of the blades. This invention, through the targeted design of the recessed structure on one side of the suction surface, effectively suppresses gas flow separation and eddies, reduces flow losses, and weakens the interference of shock waves and secondary flow in the end region. Verification shows that the hub structure of the centripetal impeller with a large expansion ratio using this invention significantly reduces the total pressure loss within the channel.

A composite vane with a locking feature including a leading edge and a trailing edge opposite chordwise from the leading edge; a radially inner attachment region opposite spanwise from a radially outer attachment region; a span dimension extending between the radially inner attachment region and the radially outer attachment region; a chord dimension extending between the leading edge and the trailing edge; a pressure side opposite a suction side of the composite vane; a dovetail section formed within the composite vane proximate the radially outer attachment region; a shoe member in operative communication with the dovetail section; a boot in operative communication with an inner portion opposite spanwise from the dovetail portion; and a failsafe fastener in operative communication with the boot and the inner portion of the composite vane.

The application discloses an oil fume extractor. The oil fume extractor comprises a box body, wherein the box body is formed with a containing cavity, the box body comprises a smoke suction surface, and the smoke suction surface is provided with an upper air inlet and a lower air inlet which are communicated with the containing cavity; the lower air inlet is located at the bottom end of the upper air inlet, and the air volume of the lower air inlet is greater than that of the upper air inlet in a working state. The oil fume extractor provided by the application has the advantages of simple structure, small size, low cost, and the same smoke suction effect can be achieved by using a small air volume, so that the user's hearing noise can be reduced, the overflow of oil fume can be reduced, and the smoke suction stability can be improved.

This utility model discloses an anti-sticking electromagnetic suction head device, relating to the field of magnetic suction handling technology. Specifically, it includes a lifting plate, an electromagnet, and a side plate. The electromagnet is slidably connected to the lifting plate, with its side away from the lifting plate serving as the suction surface. The side plate is connected to the lifting plate and extends towards the electromagnet. When the electromagnet moves towards the lifting plate, its suction surface can move to a position between the end face of the side plate and the lifting plate, allowing the workpiece to be detached from the electromagnet's suction surface through the end face of the side plate. The electromagnet attracts and transports the workpiece. When the electromagnet is demagnetized, and its remaining magnetic force still attracts, the electromagnet retracts inward, causing the side plate to contact the workpiece on the electromagnet's suction surface, thus detaching the workpiece from the electromagnet's suction surface and preventing secondary attraction of the workpiece.

The application discloses a kind of electrolytic cell blade wave-shaped flow field structure. Including electrolyte inlet, electrolyte outlet, order blade rib and inverted blade rib, the suction surface is adopted at the back of blade rib, and the air flow pressure is lower along its surface, while the pressure surface is at the blade basin, and the fluid pressure is higher on one side of its surface, can form certain pressure difference between adjacent flow channel and enhance mass transfer process;The order and inverted blade rib are alternately arranged, and the wave-shaped flow channel with gradually changing flow cross-sectional area is formed, so that the gas-liquid flow velocity distribution in the flow channel is uniform, effectively ensuring the uniformity of electrolyte and current density distribution;A certain gap is provided between the adjacent two blade ribs, which is beneficial to reduce the local pressure and avoid the blocking phenomenon of gas and electrolyte, and the disturbance effect is increased by the edge protrusion of blade rib, so as to strengthen the mass transfer process of flow field and realize the uniformity of temperature distribution.

The application relates to the technical field of axial flow fans, in particular to a guide ring, an axial flow fan and an air conditioner, which are applied to the axial flow fan; the guide ring comprises a guide cylinder and an embedded ring body; the inner surface of the guide cylinder is sequentially provided with a first guide ring and a second guide ring in the air outlet direction; a connecting portion is arranged between the first guide ring and the second guide ring; the inner diameter of the first guide ring is smaller than that of the second guide ring; the first guide ring and the second guide ring correspond to the suction surface and the pressure surface of the axial flow fan blade respectively; the embedded ring body is located in the second guide ring and is adjacent to the first guide ring; the inner diameter of the embedded ring body is larger than that of the first guide ring; the gap between the embedded ring body, the second guide ring and the connecting portion forms a non-return flow channel; the guide ring can effectively solve the problem of leakage loss of the axial flow fan under the high static pressure working condition while ensuring that the axial flow fan has sufficient safety tip radial clearance.

The application discloses a kind of power vane forming die preparation methods, preparation wooden die;Preparation carbon fiber composite material suction surface shell mold: epoxy resin mold gelcoat is sprayed on the surface of wooden die of suction surface shell;According to the layer design of suction surface shell mold meat, carbon fiber fabric layer is sequentially placed on the surface of gelcoat layer;Vacuum bag film encapsulation is used to detect air tightness;According to the weight fraction of carbon fiber fabric, epoxy resin glue solution is prepared, and is injected into mold meat forming cavity;Solidification, cooling then remove and clean the forming auxiliary material on the surface of mold meat;2-5 layers of carbon fiber fabric are laid on the surface of mold meat, and pre-prepared carbon fiber composite material framework is placed, and filler is used to fill and smooth the hollow part of the framework, then 2-5 layers of carbon fiber fabric are used to cover, vacuum bag film encapsulation is used to detect air tightness, and finally epoxy resin is injected, and co-curing is shaped.The application also discloses a kind of forming die prepared by the preparation method.

A wind turbine blade extending in a longitudinal direction between a root end and a tip end and comprising a shell having an outer surface defining a pressure side and a suction side, a leading edge and a trailing edge, a chord having a chord length extending between the leading edge and the trailing edge and a load-bearing structure extending in the longitudinal direction, the wind turbine blade further comprises a dampening system comprising a blade dampening body attached exteriorly to the load-bearing structure or exteriorly to the outer surface of the shell, at least a first dampener located within the blade dampening body and positioned with a component in the chordwise direction of the blade and adapted to absorb vibrational forces the wind turbine blade is subjected to.

This disclosure relates to a method for designing compressor blades and the compressor blades themselves. The method includes: determining the suction surface profile of a basic blade profile with a blade height section, which includes: giving the leading edge metal angle β of the suction surface profile. in Trailing edge metallic angle β out And the axial projection length L of the suction surface profile, where β out <β in Establish a rectangular coordinate system OXY, with the X-axis parallel to the axial direction. The coordinate of the leading edge S of the suction surface profile is 0 on the X-axis, and the coordinate of the trailing edge C of the suction surface profile is L on the X-axis. Given the maximum turning point A of the suction surface profile, the coordinate of the maximum turning point A on the X-axis is greater than 90% and L is less than L. Given the metal angle β of the maximum turning point A. A ,β A <β out The suction surface profile is determined by making the metal angle of the suction surface profile gradually decrease from the leading edge point S to the maximum turning point A, and gradually increase from the maximum turning point A to the trailing edge point C. This disclosure is used to improve the aerodynamic performance of compressors and achieve precise control of the suction surface Mach number.

The application discloses a welding positioning device, which comprises a support, a first suction positioning member and a supporting assembly. The support is used for extending into the inner cavity of a fixed supporting leg and has a lower supporting surface. The first suction positioning member is arranged at the inner end of the support, and the downwardly arranged suction surface is flush with the lower supporting surface. The suction surface can fix and suck the lower sliding block of the fixed supporting leg. The supporting assembly comprises a supporting positioning member and a balance placing member. The supporting positioning member is arranged at the outer end of the support and has an upper supporting surface for placing the upper sliding block. The balance placing member is arranged at the outer end of the support. The balance placing member is used for supporting the support when the suction surface fixes and sucks the lower sliding block, so that the distance between the lower supporting surface and the fixed supporting leg is equal to the height of the lower sliding block, and the height precision and parallelism of the lower sliding block and the upper sliding block after welding can be met.

This invention relates to a supportless μSLM fabrication method for a two-stage radial vortex generator based on characteristic rotation and critical angle shaping, and to the two-stage radial vortex generator itself. The method includes the following steps: preparing a μ-SLM device equipped with a fiber laser and a precision beam shaping system, and spherical metal powder; setting the printing parameters of the μ-SLM device and adjusting the overhang angle of the printing substrate to a calibrated critical angle; printing the component in a rare gas protective atmosphere, and monitoring the spheroidization and collapse trends of the spherical metal powder in real time; cooling the component after printing; separating the cooled component from the printing substrate, and measuring the surface roughness of the pressure and suction surfaces of the component to determine if the component meets the requirements. Compared with existing technologies, this invention has advantages such as supportless printing and high-fidelity conversion of the original aerodynamic configuration into the final product.

The application relates to the technical field of lens measurement, and discloses a measuring device applied to 3D watch lenses, which comprises a supporting component, a plurality of uniformly spaced supporting pieces, and airflow suction grooves arranged on the supporting pieces; the plurality of supporting pieces are oppositely provided with suction ends and air supply ends; the suction ends are used for supporting the 3D watch lenses; the air supply ends are used for connecting air sources and the airflow suction grooves to form a negative pressure suction surface on the suction ends; detection areas are formed between adjacent supporting pieces, the detection areas are used for extending probes to detect convex parts of the 3D watch lenses. The negative pressure suction surface is formed by the spaced supporting pieces to stably fix the lenses, and the detection areas are formed between the adjacent supporting pieces to extend the probes, so that the problem that the lenses need to be turned over in the traditional lens measurement process is solved; the scheme can fix the 3D watch lenses once and directly measure two surfaces, the lenses do not need to be turned over again, the operation process of measurement is effectively simplified, and the detection efficiency is improved.

This invention relates to the field of turbomachinery technology, and provides a geometric construction method and system for a two-dimensional blade profile in tandem, comprising: using the pressure surface profile of the front row of blades as a reference, at the starting point... P End point of front pressure surface T PS An arc length coordinate system is established between the points, and a channel width function is defined. The channel generation segment profile of the rear blade suction surface is generated by offsetting along the outer side of the normal at each point. A free-form segment profile is then constructed that smoothly connects to the channel generation segment, resulting in the complete rear blade suction surface. Subsequently, the rear pressure surface profile is generated by offsetting along the inner side of the suction surface normal according to a preset thickness distribution function, and smooth leading and trailing edge connection curves are constructed respectively, completing the two-dimensional airfoil structure of the rear blade. This invention combines the slit channel width distribution with the rear blade suction surface generation process, ensuring the geometric continuity of the channel segment while improving the freedom, parameterization, and geometric adjustability of the airfoil design, facilitating aerodynamic design, optimization design, and engineering applications.

The present application relates to a kind of diode surface defect detection method and system, it is related to the field of diode detection technology, it includes in response to defect detection signal, obtains detection suction pen number and diode number;Control detection suction pen executes suction operation to diode to obtain corresponding suction surface number;Suction surface number is determined to suction surface detection scheme, simultaneously based on suction surface number, corresponding camera surface number is determined;Suction surface detection scheme is executed to obtain suction defect area and define as defect area;The defect image corresponding to camera surface number is collected to obtain camera defect area and define as defect area;When defect area is greater than defect critical value, this diode number is defined as abnormal diode number and output;When defect area is less than defect critical value, this diode number is defined as qualified diode number and output.The present application has the effect of improving the accuracy and reliability of diode surface defect detection.

The application provides a kind of adhesive tape bonding device, belong to packaging equipment field.The adhesive tape bonding device includes support frame and two suction members arranged on the support frame, two suction members are each provided with suction surface for adsorbing adhesive tape, the drive mechanism for driving two suction members relative opening and closing is further provided on the support frame, two suction members are arranged in sequence, the junction line of two suction surfaces is folding center line, the guide structure is arranged between support frame and two suction members, the guide structure includes the arc-shaped track arranged on one of support frame and suction member and the sliding body on the other, the sliding body is rotationally stopped with arc-shaped track and guided cooperation, the curvature center of arc-shaped track is located at folding center line.The application is by two suction members arranged in sequence, and utilizes the guide structure between suction member and support frame, so that two suction members can rotate around folding center line, to prevent the excess adhesive tape part that adhesive tape bonded on continuous packaging bag does not effectively bond.

This invention relates to the field of wind turbine blade technology, and particularly to an anti-creep blade and a wind turbine comprising it. The blade includes a blade root, blade tip, leading edge, trailing edge, suction surface, and pressure surface. A circumferential rib protrudes from the pressure surface onto the suction surface, near the blade tip. The circumferential rib extends circumferentially around the blade's rotation axis, with its two ends penetrating the leading and trailing edges, respectively. Multiple radial reinforcing ribs are arranged on the suction surface of the blade, extending from the blade root towards the blade tip. Each radial reinforcing rib is located between the protruding tip of a circumferential rib and the blade root. The connection between the circumferential and radial reinforcing ribs is a rounded transition. The multiple radial reinforcing ribs are spaced apart along the direction from the leading to the trailing edge. The anti-creep blade of this invention, through the synergistic effect of the circumferential and radial reinforcing ribs, enables the blade to maintain its original airfoil accuracy under high-temperature, long-term service conditions, thus improving the blade's anti-creep performance under high-temperature, long-term operation.

The utility model discloses a kind of air deflector assembly for air conditioning equipment and air conditioning equipment with it, air deflector assembly for air conditioning equipment includes: frame and first air deflector blade, first air deflector blade is configured as at least two in first direction interval arrangement, the minimum interval of adjacent two first air deflector blades in first direction is G, the thickness dimension of first air deflector blade is D, and satisfy 1 / 5≤D / G≤1 / 4;Wherein the two side surfaces of first air deflector blade in thickness direction are pressure surface and suction surface respectively, second end is also formed with connecting surface, connecting surface is suitable for being connected with pressure surface and suction surface respectively;The edge between the connecting surface of pressure surface and first end is L;The edge between the connecting surface of suction surface and first end is S, and satisfy 0.7≤S / L≤0.9。According to the air deflector assembly for air conditioning equipment designed in the utility model, wind resistance can be reduced, and airflow flow loss is reduced.

The application discloses a high-gas-content helical axial flow gas-liquid mixed transport pump impeller, which comprises a hub, blades and a rim, a plurality of circular-arc grooves are arranged on the outer wall of the hub, a plurality of arc protrusions are arranged on the inner wall of the rim, the blades comprise a first type of blades and a second type of blades which are alternately arranged, the first type of blades and the second type of blades adopt airfoils with reverse curve characteristics in the area close to the hub, a protruding curved surface is arranged on the suction surface of the end of the second type of blades, convergent flow channels are arranged on the first type of blades, the entrances of the channels are located at the maximum thickness of the curved surface protrusions, a gas collecting cavity is arranged on the hub on the suction surface side of the end of the first type of blades, a jet hole is arranged on the hub on the suction surface side of the middle of the second type of blades, and the jet hole and the gas collecting cavity are communicated in the hub, and the application solves the flow channel blockage problem of the helical axial flow gas-liquid mixed transport pump under high gas content through a set of flow control systems with multiple components in cooperation, and the gas phase aggregation process is inhibited and intervened from the root.

The application provides an atomization assembly and an atomizer. The atomization assembly comprises a bracket, a flat plate-shaped oil guide body and a sheet-shaped heating body which are vertically or obliquely arranged in the bracket, and a sealing element assembled to the top end of the bracket. The oil guide body has opposite liquid suction surfaces and atomization surfaces. The heating body is arranged on the atomization surface of the oil guide body. An atomization cavity is formed in the atomization assembly on one side of the atomization surface. The bracket is provided with a ventilation groove. The groove bottom of the ventilation groove is provided with a first flow guide surface. The sealing element is provided with a second flow guide surface opposite to the first flow guide surface. The first flow guide surface and the second flow guide surface are both inclined towards the central axis of the atomization assembly. The first flow guide surface and the second flow guide surface enclose at least part of an air outlet channel which is in communication with the atomization cavity. The cross-sectional size of the air outlet channel of the present scheme is less likely to be affected by the thickness direction of the atomization assembly, and can be designed to be larger, so that the aerosol air outlet is more smooth, and the condensate accumulation is less.

The application discloses a closed impeller and a manufacturing method thereof. The closed impeller comprises an impeller body and secondary splitter blades. The impeller body comprises a disc and a cover arranged oppositely. A plurality of main blades and a plurality of primary splitter blades are connected between the disc and the cover. An airflow channel is formed between the disc, the cover, the main blades and the primary splitter blades. The inner walls on both sides of the airflow channel define a pressure surface and a suction surface respectively. The airflow channel forms an outlet at the side wall of the impeller body. The secondary splitter blades are arranged obliquely at the outlet of the airflow channel. Along the width direction of the airflow channel, the secondary splitter blades are closer to the suction surface than the center line of the airflow channel. By arranging the secondary splitter blades, the secondary flow and the wake vortex at the outlet of the impeller are directly intervened and weakened, so that the flow loss is reduced, the slip factor is improved, and the efficiency and overall working performance of the impeller are improved.

The invention relates to an electric axial fan (1) for a vehicle front-end cooling module, comprising an electric motor (2) with a stationary stator (3) and a rotatable rotor (4), a rotor housing (5) coupled to the rotor (4) which has an end face with several axial openings (13), a fan hub (6) attached to the rotor housing (5) which has radially outwardly extending fan blades (8) to convey air from a suction side (11) to a pressure side (12), and a cover (7) covering the end face of the rotor housing (5) on which several projections (14) are formed which correspond to the several axial openings (13) such that air from the pressure side (12) passes through the rotor housing (5) and the cover (7) to the suction side (11), each projection (14) of the several projections (14) having a first section (14.1) and a second section (14.2) has, wherein the first section (14.1) covers a corresponding axial opening (13) at axial distances, and the second section (14.2) forms a channel open to the end face on an end face of the cover (7) facing the suction side (11), which leads to a radial outer circumference of the cover (7) and has a curved course.

The invention relates to an apparatus (10) for handling articles, having a gripping device (16) which can be subjected to negative pressure for the grasping of the articles using suction, and having a cleaning device (36) which can interact with the gripping device (16) in order to remove contaminants present therein or thereon. The invention also relates to a method for regenerating a suction surface (18) and / or air-conducting portions (32) of a gripping device (16), which comprises a movably suspended plate-like suction device which can be areally subjected to negative pressure in order to, on an underside, suction and grasp a plurality of articles by suctioning the articles onto an air-permeable elastic layer (26) when suction pressure is applied. In the method, a cleaning operation is provided, in which contaminants and / or deposits are removed at least from the elastic layer (26) and / or from the air-conducting portions (32) of the gripping device (16).

The application discloses a turbine shock wave disturbance modulation method based on array modeling and relates to the technical field of aero-engines. The turbine shock wave disturbance modulation method based on array modeling comprises the following steps: at least one array type protruding structure is arranged in a trailing edge area in front of a trailing edge point of a suction surface of a guide vane body; at least one array type recessed structure is arranged in a trailing edge area in front of a trailing edge point of a pressure surface of the guide vane body; and at least one array type recessed structure is arranged on the suction surface of the guide vane body and located before an expected reflection point of an inner stretching shock wave from the pressure surface to the suction surface. According to the application, a protruding structure is arranged in front of an outer stretching shock wave of a guide vane trailing edge, and a recessed structure is arranged in front of an inner stretching shock wave of the guide vane trailing edge, so that the outer stretching shock wave is effectively weakened, the intensity of a reflected shock wave is relatively enhanced, and the disturbance difference suffered by a rotor under the action of two shock waves is reduced.

The application provides a wind power blade and a wind power generation device. The wind power blade comprises an outer shell; the outer shell has a suction surface and a pressure surface; a leading edge of the outer shell is provided as a wave-shaped bionic structure, the wave-shaped bionic structure comprises convex parts and concave parts which are alternately arranged along a span direction of the outer shell, wherein an outer surface of the convex part is provided with a hydrophobic texture, and an outer surface of the concave part is provided with a flow guide microstructure configured to regulate a flow direction of liquid on the outer surface of the concave part. By arranging the wave-shaped bionic structure at the leading edge of the outer shell, stall can be delayed, and aerodynamic performance under a large angle of attack can be improved. By arranging the hydrophobic texture on the outer surface of the convex part of the wave-shaped bionic structure, efficient hydrophobic anti-icing can be realized. By arranging the flow guide microstructure on the outer surface of the concave part of the wave-shaped bionic structure, rapid discharge of the gathered liquid can be realized, and the possibility of local corrosion can be reduced.

This invention proposes a biomimetic propulsion structure for an AUV, belonging to the field of AUV propulsion structure technology, including a fuselage frame assembly and a pectoral fin assembly. The pectoral fin assembly comprises two sets of pectoral fin assemblies of different sizes, located at both ends of the fuselage, with two identical single-wing assemblies symmetrically arranged along plane P in each set. The fuselage frame assembly includes a support rod along the X-direction, with a double-wing connecting assembly at each end. The mounting base connects to a slanted bracket and a vertical frame, with the vertical frame hinged to a meshing gear and driven by a motor. In the single-wing assembly, a pivot is hinged to the slanted bracket, and a linkage rod is hinged to the non-center of the gear. Its two ends are hinged to a first and a second hinge shaft, respectively connecting to a small wing rod and a large wing rod. The large wing rod is movable through the pivot, and the other ends of both rods are hinged to a "Y"-shaped wing rod. The airfoil frame is fixed to the wing rod, with the suction surface facing upwards and the pressure surface facing downwards. The chord line forms an angle with the horizontal plane, generating forward thrust through the water reaction force when swinging downwards, thus avoiding the use of a propeller and reducing noise.