60results about How to "Improve propulsion efficiency" patented technology

The invention provides a flow guiding device of a ship propeller and a ship. The flow guide device comprises a plurality of guide vanes, the guide vanes are fixedly connected to the stern of the ship in the circumferential direction of the propeller, and the guide vanes are arranged at different positions in the axial direction of the propeller. The guide vanes are arranged at different positions in the axial direction of the propeller, so that the stress borne by the flow guide device is reduced; by limiting the circumferential length of flow guide, the resistance borne by the flow guide device can be reduced on the premise that the stability of the structure is improved. The ship stern and the flow field around the propeller are improved, the propelling efficiency of the propeller is improved, and the pressure at the blade backs of the propeller blades can be increased, so that the stress of the propeller is increased, and the thrust component is increased accordingly; the flow field pressure at the guide vanes outside the guide wheel can be reduced, so that the flow velocity of the flow field is increased, and the propeller efficiency is improved.

The invention provides an annular propeller of a cross-domain aircraft, the cross-domain aircraft and a use method of the cross-domain aircraft, and belongs to the field of cross-domain aircrafts, the connecting part, close to the downstream, of the connecting part of a propeller blade and a propeller hub is a heel part, and the part, from the blade tip to the heel part, of the propeller blade is a rear section; the rear section comprises a spiral section, a straight section and a movable section, one end of the spiral section extends to the blade tip, the other end of the spiral section extends towards the heel part, the straight section is arranged at the heel part and straightly extends by aligning to the free end of the spiral section, one end of the movable section is inserted into the straight section, and the other end of the movable section abuts against the free end of the spiral section; and the movable section moves towards the straight section and is separated from the spiral section. The rear root part of the annular propeller is provided with the movable section, the movable section can move and enter the straight section, the propeller blades are switched between the annular structure and the non-annular structure, the propelling direction of the propeller blades does not need to be changed according to the change of the navigation environment, and the annular propeller can also be applied to a cross-domain navigation unmanned aerial vehicle.

The utility model discloses a ducted fan, which belongs to the technical field of aviation ducted fan engines, and comprises an annular duct, a plurality of blades and a plurality of blades, the fan blades are arranged in the annular duct, blade tip arc surfaces are arranged at the blade tips of the fan blades, and blowing gaps are formed in the sides, close to the suction surfaces, of the fan blades; the fan blades are fixedly connected to the outer side of the fan shaft; the driving part is used for driving the fan shaft to rotate, and the driving part is arranged on the rear side of the annular duct; the ratio of the height of the air blowing seam to the diameter of the arc surface of the blade tip is set to be 0.01-0.05; an air flow channel is formed in the fan blade and communicates with the air blowing seam. The number of the fan blades is two or more. The interior of the fan shaft is of a hollow structure. According to the utility model, the blade top clearance leakage flow is reduced by blowing at the top ends of the blades, so that the propulsion efficiency of the ducted fan is improved.

The invention provides a coal mine air way floor heave cleaning device and method. The coal mine air way floor heave cleaning device comprises a crawler-type excavator assembly, a conveying mechanism and a supporting mechanism. The crawler-type digging machine assembly is arranged beside a working face of an air way roadway and used for crushing and collecting floor heaves of the air way and transferring collected gangue coal cinder materials to the conveying mechanism; the conveying mechanism is connected to the rear end of the crawler-type digging machine assembly and used for conveying gangue coal cinder materials to a goaf. The supporting mechanisms are arranged on the periphery of the crawler-type excavator assembly and the periphery of the conveying mechanism correspondingly and used for supporting the air way roadway. When the coal mine air way floor heave cleaning device is used for cleaning a floor heave, crushing, slag cleaning, loading and transporting, transshipping and continuous conveying and discharging can be carried out at the same time, and the propelling efficiency of a fully mechanized coal mining face of a coal mine is improved.

The invention discloses an underwater vehicle vector propelling device adopting a shaftless rim propeller. Comprising a shaftless rim type propeller, a shell, a vector rotating mechanism and a base mechanism, the shaftless rim type propeller is used for direct vector propulsion of the underwater vehicle and installed at a tail port of the shell, and the base mechanism is used for fixing the vector rotating mechanism of the underwater vehicle and installed at a head port of the shell. The vector rotating mechanism is used for vector rotation of the shaftless rim type propeller and is hinged between the shaftless rim type propeller and the base mechanism. The shaftless rim thruster is applied to the vector propulsion device of the underwater vehicle, under the condition that an original vector propulsion device gets rid of a tail vane, the propulsion efficiency of the underwater vehicle is effectively improved, the navigation noise of the vehicle is reduced, and compared with a traditional vector propulsion device, the shaftless rim thruster has the advantages that the propulsion efficiency is improved; the device has the advantages of high efficiency, small occupied cabin space, low noise and small vibration.

The utility model relates to a noodle maker which comprises a noodle containing barrel provided with a noodle containing cavity and a noodle extruding pipe, a noodle extruding barrel is coaxially arranged in the noodle extruding pipe, a stirring and extruding assembly is rotatably connected in the noodle containing barrel and comprises a noodle kneading rod and a noodle extruding rod which are in transmission connection with each other, the noodle kneading rod is rotatably arranged in the noodle containing cavity, and the noodle extruding rod is rotatably arranged in the noodle extruding barrel. A conical noodle guide cavity is formed between the noodle containing cavity and the noodle extruding pipe, the diameter of the conical noodle guide cavity is gradually reduced in the direction from the noodle containing cavity to the noodle extruding pipe, a feeding plate with a U-shaped or J-shaped vertical section is arranged at the tail end of the noodle extruding cylinder, and the feeding plate extends from the tail end of the noodle extruding pipe to the noodle containing cavity and extends into the conical noodle guide cavity; the conical noodle guide cavity is provided with a noodle guide rod extending from the inner bottom of the conical noodle guide cavity to the noodle accommodating cavity, the end part and the top of the feeding plate are open, the noodle guide rod is obliquely propped against the top of the feeding plate from top to bottom, and the noodle guide rod and the feeding plate jointly form a noodle extrusion feeding hole.

The invention belongs to the technical field of aviation, and particularly relates to a supersonic civil aircraft layout. According to the supersonic civil aircraft layout, the engine nacelle is installed above the rear fuselage between the wing and the horizontal tail, the lower portion of the air inlet is shielded by the rear edge of the wing, the lower portion of the air outlet is shielded by the front edge of the horizontal tail, shock waves generated by the engine are prevented from spreading to the ground through the shielding effect of the wing and the horizontal tail, and the ground sound explosion loudness of the aircraft is effectively reduced; the engine and the hanger can perform small-angle pitching deflection around the rotating shaft in the hanger, so that the mounting angle of the engine is adjusted, and the propulsive efficiency of the engine under the non-design-point working condition is improved; the horizontal tail tip can be folded upwards to provide additional vertical tail capacity during supersonic cruising, loss of vertical tail efficiency during supersonic cruising is made up, and expansion waves generated by an engine exhaust nozzle and a horizontal tail are prevented from spreading to the ground. And the wingtip is put down during low-speed take-off and landing, so that a larger horizontal tail area is ensured, and the trimming requirement of a take-off and landing structure is met.

The invention discloses a distributed power fixed-point take-off and landing portable solar unmanned aerial vehicle, and belongs to the technical field of overall comprehensive design of unmanned aerial vehicles. Comprising a front wing, a rear wing and a folding assembly, the front wing and the rear wing are arranged in a tandem wing mode, the folding assembly is connected between the front wing and the rear wing, the front edge of the front wing and the front edge of the rear wing are each provided with a plurality of rotors in the spanwise direction, and the four rotors located in the spanwise middle of the front wing and the spanwise middle of the rear wing are located at the four vertexes of a quadrangle respectively to form the four-rotor power system of the unmanned aerial vehicle. The other rotor wings form a fixed wing power system of the unmanned aerial vehicle; the front wing and the rear wing are connected into a tandem wing with a space height difference through the folding assembly, and the front wing and the rear wing can be in a stacked state through deformation. The problems that a single-type propeller of a tailstock type configuration machine consumes much energy, the efficiency of the cruising stage is low, and the endurance is short are solved.

The invention discloses a noise reduction and efficiency improvement pump jet propeller C-shaped circumferential bending stator and a design method, and the method comprises the steps: building a hull-rudder-pump jet propeller calculation model, changing the phase angles theta of the stator at different radiuses, and preliminarily determining the lateral slope distance distribution parameter ai of the C-shaped circumferential bending stator; after a pump-jet propeller provided with a straight stator and a C-shaped circumferential bending stator is arranged in an underwater vehicle, self-propulsion test simulation is carried out, and the thrust and torque of each component of the propellers when the two different propellers are at self-propulsion points are monitored; adjusting a slant distance distribution parameter ai of a bent stator side to obtain different distribution forms of circumferential phase angles of the stator; adjusting geometric attack angles alpha of sections at different radiuses of the stator blade, and selecting the most suitable distribution form of the geometric attack angles alpha as an optimization result; and determining the most suitable chordwise distribution form of the blade section as an optimization result. According to the invention, the bearing force, hydrodynamic noise and structural vibration noise of the submarine propeller are reduced only through the lateral inclination change of the stator blades.

The invention belongs to the field of underwater vehicle propellers, and particularly discloses a straight laterally-inclined stator for noise reduction and efficiency improvement of a pump-jet propeller and a design method. Comprising the steps of designing and optimizing the sizes of side oblique angles theta and beta of the straight side oblique stator, the axial distance between a stator blade and a rotor disc surface, geometric attack angles alpha of sections at different radiuses of the stator blade, and a chordwise distribution form of the sections of the stator blade. According to the invention, through the straight side oblique stator, the phases of high-wake regions at different radiuses in the rear flow field of the trailing edge of the stator are inconsistent, and the change trend of the phase angle of the high-wake regions is opposite to the change trend of the rotor side oblique angle from the inner radius to the outer radius; and the distribution form of the wake peak phase angle at each radius and the distribution form of the rotor side oblique angle show relatively large orthogonality, so that the purpose of reducing the bearing force, the hydrodynamic noise and the structural vibration noise of the submarine propeller is achieved only through the change of the stator blade side oblique angle.

The invention belongs to the field of underwater vehicle propellers, and particularly discloses an S-shaped nonlinear skew distribution stator for a pump jet propeller and a design method. Comprising the steps of preliminarily determining side oblique angles of a stator at different radiuses according to side oblique angles theta of a rotor at different radiuses, then determining the maximum side oblique angle according to the influence on the propulsion efficiency and unsteady force of a pump-jet propeller, and obtaining the optimal molded line of the S-shaped nonlinear side oblique distribution stator according to the maximum side oblique angle. According to the characteristic that the rotating direction of the rotor and the side inclination of the rotor are distributed along with the radius, the profile line type and the side inclination angle of each section of the stator are properly changed, so that fluid passes through the stator to be pre-rotated, and meanwhile, the phase difference of wake peak circumferential phase angles at different radiuses in the wake of the stator is increased; therefore, the orthogonality of the distribution characteristic of the wake peak circumferential phase angle along with the radius of the rotor disc surface and the distribution characteristic of the phase angle along with the radius of the section of the rotor blade is increased, the exciting force and noise of the pump-jet propeller are effectively reduced, and the propelling efficiency of the propeller is improved.

The invention provides a cross-medium coaxial double-rotor unmanned aerial vehicle with foldable propellers and a control method of the cross-medium coaxial double-rotor unmanned aerial vehicle. The unmanned aerial vehicle comprises a main fuselage module, a vector motor base module, a coaxial propeller power module, a foldable propeller module, a waterproof sealing module and electronic equipment. According to the cross-medium power system, by folding the propellers, the effective area of the propellers is reduced, the influence of different working media of the cross-medium unmanned aerial vehicle on the efficiency of the propellers is fundamentally reduced, the capacity loss is reduced, and the endurance time is prolonged; the number of actuators is reduced, a complex gear structure is omitted, the weight of the unmanned aerial vehicle is reduced, the reliability of the unmanned aerial vehicle is improved, finally, control codes suitable for the cross-medium coaxial double-rotor unmanned aerial vehicle are designed, and automatic control over the rotating speed of motors and folding of propellers of the unmanned aerial vehicle under different working media are achieved. And the power distribution of the unmanned aerial vehicle in the cross-medium task is more reasonable.

The invention belongs to the technical field of multi-ship fleets, and relates to a ship paddle propulsion module of a multi-ship fleet. The fixed base (7) is fixed on a ship body (8), the connecting sliding seat (5) is arranged on the fixed base (7), the movable sliding rail (4) is movably clamped on the connecting sliding seat (5), one end of the movable mechanism telescopic component (6) is connected with the fixed base (7) located on the inner side of the ship body (8), the other end of the movable mechanism telescopic component (6) is connected with the propelling cabin body (1), and an engine (9) on the propelling cabin body (1) is connected with a steering oar (11). A clamping block (12) is arranged on the moving track (4), and the locking mechanism (3) comprises a first hoop (13), a second hoop (14) and a locking mechanism telescopic component (15). The multi-ship fleet ship propeller propulsion module is simple in structure and high in rudder propeller maneuverability and flexibility, the propulsion module body can be laterally pushed out, front ship interference is prevented, wake flow accumulation is reduced, and the propulsion efficiency is improved.

This invention provides an AUV multi-thrust propulsion system, comprising stabilizers, auxiliary rim thrusters, an AUV stern body, main rim thrusters, fairings, connecting discs, and a tail-mounted connecting frame. The main rim thrusters are fixedly connected to the rear end of the AUV stern body via the connecting discs. The fairings are positioned behind the blades of the main rim thrusters. The four auxiliary rim thrusters are uniformly fixed in a cross shape around the circumference of the AUV stern body. The four stabilizers are arranged in an X-shape on the stern body, staggered and evenly spaced with the four auxiliary rim thrusters. The advantages of this invention are increased maneuverability and controllability while reducing the complexity of the drive mechanism, saving stern space, and increasing the power, maneuverability, and system redundancy of the propulsion system by using multiple rim thrusters, thereby improving the safety, stability, controllability, and mission execution efficiency of the AUV in complex underwater environments.

A design method for a large-skew contra-rotating propeller propulsion system of a high-speed underwater vehicle comprehensively considers the wake flow distribution characteristics of the tail of the underwater vehicle, and comprises the steps of selecting circular rector distribution matched with the wake flow distribution form, optimizing disc surface ratio and chord length distribution, designing reasonable skew and trim distribution, selecting proper profile thickness and camber distribution and the like. The invention aims to improve the propulsive efficiency, reduce the yawing moment and meet the design requirements on the premise of avoiding cavitation. Particularly, in the design process, the design scheme is iteratively optimized by combining CFD calculation and a potential flow theory method, it is ensured that the final scheme is optimal in the aspects of propulsive efficiency and cavitation performance, and the requirements of the high-speed aircraft are met.

The invention relates to the technical field of underwater robots, in particular to a modular underwater robot stability adjusting system and an adjusting method thereof, which can realize stable navigation of an underwater robot in a complex environment and improve the working efficiency and safety of the underwater robot. According to the system, a modular design concept is adopted, the system can be easily integrated into underwater vehicles of various shapes and sizes, the application range of equipment is greatly expanded, and a suitable application scene can be found from scientific research to commercial development; the stability and maneuverability of the underwater robot in various working environments can be achieved by accurately adjusting the balance weight and the telescopic fixing fins, and the safety and efficiency of underwater operation are ensured. In conclusion, the system achieves balance weight parameter adjustment of the underwater robot, the balance weight parameter adjustment comprises the heavy buoyancy relation, the heavy buoyancy center relation and the lift force, the balance attack angle and the balance rudder angle are reduced, the straight moving resistance of the underwater robot is reduced, and better stability and maneuverability are achieved.

The invention aims to provide a hybrid open type rotor engine. The hybrid open type rotor engine comprises a case, a center assembly, a first paddle fan and a second paddle fan. The center assembly comprises an air inlet cap hood arranged on the upstream side of the casing in the air inlet direction, a core machine unit and a power turbine unit. The first paddle fan is annularly arranged on the periphery of the air inlet cap hood and is in transmission connection with the power turbine unit. Wherein the casing is provided with an annular opening, and the annular opening is formed in the upstream side of the core engine unit in the air inlet direction; the second paddle fan penetrates through the annular opening and is provided with a first section located in the inner culvert flow channel and a second section protruding out of the outer side of the casing, a driving component is further arranged in the casing, the hybrid open type rotor engine further comprises an energy storage unit, the energy storage unit provides energy for the driving component, and the second paddle fan is driven by the driving component to rotate. The engine with the structure can exert performance advantages under the low-altitude low-speed working condition and the high-altitude high-speed working condition.

The invention discloses a microsatellite simulation device for multi-view fusion perception. The microsatellite simulation device is characterized in that a microsatellite shell is of a hexahedron structure; the air floatation system provides a three-degree-of-freedom zero-gravity environment for the microsatellite simulation device; the control system comprises a control unit and a control execution mechanism, wherein the control unit receives pose information sent by the external central intelligent processor and performs pose control on the microsatellite simulation device; the control execution mechanism receives the pose control signal of the control unit and executes the pose adjustment of the microsatellite simulation device; the power supply system comprises a storage battery, a power supply controller and a connecting cable, and provides sufficient energy for other systems; the visual perception system comprises a longitudinal visual angle compensation mechanism, a visual camera and an image acquisition and calculation unit and is used for target multi-angle image acquisition. Motion control and visual perception of the microsatellite base are achieved, and support is provided for ground verification of the microsatellite cooperation technology.

The present invention relates to a ship structure comprising: a hull of a ship; and an attachment structure configured to be attached to a stern of a hull, where the attachment structure may include a through hole configured to allow fluid to flow from one side surface to the other side surface, and the through hole may include an inlet formed in one side surface of the attachment structure; and an outlet formed in the other side surface of the attachment structure, the outlet being located behind the inlet.

The application discloses a non-equivalent electrode propulsion structure and method based on electrode corrosion rules, and belongs to the technical field of base plate glass manufacturing, which comprises electrodes, silver plates arranged between the electrodes, and propulsion modules arranged at the tail ends of the electrodes; the electrodes are composed of a plurality of electrode blocks, electrode blocks with the same or similar corrosion amounts form an electrode module; different electrode modules are provided with corresponding silver plate modules and propulsion modules; a corrosion amount calculation model of each electrode block of the electrode under different temperatures is established, and then the total propulsion amount of each electrode block during operation is calculated; meanwhile, electrode blocks with the same or similar corrosion amounts form an electrode module, the silver plate module and the propulsion module are designed according to different electrode modules, the non-equivalent and differentiated propulsion of the electrode blocks in the electrode is realized, the contact surface between the electrode and the glass liquid is ensured to be a plane at all times, the uniform distribution of the electrode and the glass liquid current is realized, the efficient utilization of each electrode block is realized, the service life of the electrode is prolonged, and the cost is reduced.

This invention proposes a ducted propeller, comprising a tube body, a propeller body, and protruding units. At least one groove is formed on the inner wall of the tube body. The propeller body is disposed within the tube body and located at one end of the tube body. The groove is spirally arranged around the central axis of the tube body. Several protruding units are continuously and uniformly arranged within the groove along its spiral line. Adjacent protruding units are connected end-to-end. By forming a spiral-shaped groove on the inner wall of the tube body, the propeller wake is rectified. As the wake flows towards the outlet at the free end of the tube body, the circumferential velocity component of the wake gradually decreases under the action of the groove. This results in the circumferential velocity component at the wake outlet being significantly smaller than that at the wake inlet, thereby improving propulsion efficiency and reducing noise.

The present application relates to a method for cooperative control of a single propeller of an underwater snake robot based on reinforcement learning, comprising establishing a structural model of the underwater snake robot, constructing a motion control and decision model of the underwater snake robot, defining state space and action space, and integrating the multi-joint wave propulsion of the snake body and the thrust output of the tail propeller from the central pattern generator into the control decision framework, designing a composite reward function with path tracking error, heading deviation and propulsion efficiency as targets, training the motion control and decision model of the underwater snake robot based on a reinforcement learning algorithm, generating an optimal underwater snake robot cooperative control strategy to execute a multi-waypoint path tracking task of the underwater snake robot, so that the cooperative control strategy of the joint waveform parameters and the propeller thrust is autonomously learned without relying on an accurate hydrodynamic model, thereby realizing stable and high-precision path tracking of a hyper-redundant underwater snake robot under multi-path constraints including turning sections.

The present invention relates to the technical field of push-plate furnaces, and discloses a push-plate furnace with a rapid propulsion mechanism, comprising a kiln, wherein a furnace door is arranged at the feeding end of the kiln, and a conveying mechanism and a material propulsion mechanism are arranged on one side of the furnace door, wherein the conveying mechanism comprises a branch feeding track, a long straight roller conveyor, a short straight roller conveyor and a rotating roller conveyor, wherein the branch feeding track is fixedly installed on one side of the furnace door, and the output end of the branch feeding track is opposite to the furnace door; the push-plate furnace, by arranging the branch feeding track, the long straight roller conveyor, the short straight roller conveyor and the rotating roller conveyor, enables two material propulsion mechanisms to discharge materials when the other material propulsion mechanism pushes the materials forward, thereby eliminating the time for the material propulsion mechanisms to wait for discharging materials, and by arranging a driving mechanism for driving the two material propulsion mechanisms to work alternately, the two material propulsion mechanisms can alternately push the materials forward, thereby improving the propulsion efficiency of the material propulsion mechanisms.

The invention discloses a casing pipe positioning and propelling device for a water well drilling rig, and relates to the technical field of water well drilling rigs, the casing pipe positioning and propelling device comprises a bottom plate, and a positioning assembly is arranged at the top of the bottom plate. When the device is used, real-time image information of the bottom end of the casing pipe body and the ground drilling position is captured through the camera, the image information is transmitted to the PLC to be processed, then the PLC transmits an image to an external control console in a wireless mode to be analyzed, and by controlling feeding and retreating of the hydraulic oil cylinder, the casing pipe body can be controlled to be in a wireless mode. The bottom end of the casing pipe body is finely adjusted, so that alignment with a drill hole is achieved, accurate positioning of the casing pipe body is further achieved, under the action of the connecting assembly, the firmness of casing pipe body installation and the stability during moving are improved, the personal safety is improved, under the action of the positioning assembly, the position of the casing pipe body is automatically adjusted, accurate positioning is achieved, and the drilling efficiency is improved. The method is not influenced by human subjective factors, and the working efficiency is improved.

The utility model discloses an automatic rock plate propelling device which comprises a supporting frame. A rolling shaft is arranged on one side of the supporting frame, and a side support is arranged on the other side of the supporting frame. Wherein an adjusting rod is arranged on the other side of the side support, an outer sliding groove is formed in one side of the adjusting rod, an adjusting cavity is formed in one side of the outer sliding groove, and an inner sliding groove is formed in the other side of the outer sliding groove; wherein an adjusting block is arranged on the other side of the adjusting rod, a rotating rod is arranged on one side of the adjusting block, and an inserting block is arranged on one side of the rotating rod, so that the effect that the sliding plate is conveniently controlled to alternately drive the rock plate to be pushed is achieved, and the effects of improving the rock plate pushing efficiency and improving the rock plate pushing efficiency are achieved; and by arranging an outer sliding groove, an inner sliding groove, an adjusting cavity, an adjusting plate and a torsion spring on the bottom surface of an adjusting rod, the sliding rod can be conveniently controlled to drive a rotating rod and an inserting block to automatically complete inserting and separating of the perlite plate, so that pushing of the perlite plate is more convenient and faster.

The utility model relates to the technical field of propelling power, in particular to a split type outer rotor rim shaftless propeller which comprises a driving module and a transmission module, and the driving module comprises a main support, a stator winding and a waterproof cover. The stator winding is arranged on the main support, the waterproof cover is arranged on the main support and covers the stator winding, the transmission module comprises a rotor shell, a plurality of rotor magnetic shoes and an impeller, the rotor shell is rotationally connected with the main support and / or the waterproof cover, the rotor magnetic shoes are uniformly distributed on the inner circumference of the rotor shell, and the impeller comprises a connecting disc and fan blades. A round hole is formed in the axis of the connecting disc, the fan blades are arranged on the round hole, and the main support is provided with a through groove facing the round hole. According to the utility model, the split type outer rotor rim design is adopted, and the impeller and the rotor magnetic shoes are reasonably arranged, so that the efficient propulsion performance is realized. The impeller is reasonable in design, electric energy can be effectively converted into propulsive force, and propulsive efficiency is improved.

The invention belongs to the technical field of ships, and discloses a medium-high speed double-propeller ship. The medium-high-speed double-propeller ship comprises a ship body, two propelling devices and two shaft supporting assemblies. Two bumps which are symmetrically arranged along the central axis in the width direction of the ship body are arranged at the bottom of the stern of the ship body; the two propelling devices are symmetrically arranged along the central axis of the width direction of the ship body and correspond to the two bumps one to one, each propelling device comprises a main engine, a gear box, a propelling shaft and a propeller, the main engines are arranged in the ship body, the gear boxes are arranged in the bumps and connected with the main engines, one end of each propelling shaft is connected to the corresponding gear box, and the other end of each propelling shaft is connected to the corresponding propeller. The other end penetrates through the bump and is connected to the propeller; each propeller shaft is provided with a shaft supporting assembly, one end of each shaft supporting assembly is connected to the corresponding propeller shaft, and the other end of each shaft supporting assembly is connected to the ship body to support the corresponding propeller shaft. The medium-high-speed twin-propeller ship can reduce resistance and improve the propelling efficiency, meanwhile, the wake flow is good, the cavitation performance of the propellers can be improved, and pulsating pressure generated by the propellers on the ship body is reduced.

The utility model provides an underwater brushless motor. The underwater brushless motor comprises a stator assembly and a rotor assembly. The motor is characterized in that the stator assembly comprises a shell and a stator winding arranged on the inner side of the shell, and sealant wrapping the stator winding in a sealed mode is arranged in the shell; the rotor assembly comprises a rotor cylinder and a magnetic ring arranged on the side wall of the rotor cylinder in a sealed mode. A plurality of integrally formed paddles are arranged on the inner side of the rotor cylinder; at least two ceramic bearings are connected between the stator assembly and the rotor assembly, and the rotor assembly is rotatably connected with the stator assembly through the ceramic bearings. The motor adopts a non-central-spindle and non-support design, and the blades and the rotor cylinder are directly integrally formed, so that water flow and sundries can freely pass through the interior of the motor and are not easily wound by foreign matters such as silk threads, motor faults caused by jamming are reduced, and the system stability is improved.

The present invention relates to an annular electric propeller supported by a magnetic fluid composite suspension bearing, comprising: a housing, a rim-type motor, a magnetic fluid composite suspension bearing system and a propeller. The present invention adopts a permanent magnet brushless motor placed in water to directly drive the hubless propeller to rotate, eliminating the intermediate transmission mechanism, and the rotor and propeller assembly are supported by the magnetic fluid composite suspension bearing system and transmit the thrust to the motor and the hull, reducing the intermediate transmission loss between the motor and the propeller, improving efficiency, simplifying the propulsion system structure, reducing noise and vibration, etc.

The utility model belongs to the field of power propulsion of ships and underwater vehicles, and discloses a plunger direct-push type propeller which comprises a plunger body, a piston body and a main shaft, the plunger body and the piston body are connected into a whole through the main shaft, the surface of the plunger body is sleeved with a plunger cylinder body matched with the plunger body, and the plunger cylinder body is connected with the main shaft. A water supplementing cylinder body integrally formed with the plunger cylinder body is arranged on the plunger cylinder body, the plunger cylinder body and the water supplementing cylinder body are two independent cylinder bodies respectively, the piston body is located in the water supplementing cylinder body, the main shaft penetrates through the water supplementing cylinder body and extends into the plunger cylinder body, and a water spraying one-way seat and a water spraying one-way valve plate are arranged in the plunger cylinder body. The water spraying one-way valve plate is arranged in a water spraying one-way seat, and a valve seat water inlet is formed in the water spraying one-way seat. According to the plunger direct pushing type propeller, the propelling efficiency can be improved, and winding of similar objects such as sea grass and ropes can be avoided.