552results about "Rotary propellers" patented technology

The invention provides a water-air two-domain self-adaptive state switching efficient propelling folding propeller, which comprises a propeller hub, a propeller blade, a propeller blade, a propeller blade and a propeller blade, the N fixed paddles are uniformly distributed on the side wall of the cylinder in the circumferential direction; the inner sides of the fixed paddles are fixedly connected with the outer surface of the side wall of the cylinder; the fixed blades are arranged along the water pushing direction; the outer side of the fixed paddle is bent upwards, and a connecting plate is arranged at the end part of the outer side; the N folding and unfolding paddles are correspondingly mounted at the outer ends of the fixed paddles, and each folding and unfolding paddle comprises a blade and a root ring fixedly connected with the root of the blade; the N rotating joints comprise pin shafts, and the pin shafts penetrate through the connecting holes and the root ring; wherein N is greater than or equal to 3; when the propeller hub rotates and is located above the water surface, the folding and unfolding blades are unfolded under the action of centrifugal force; and when the paddle is located below the water surface, the folding and unfolding paddle is folded under the action of water resistance. The efficient propelling folding paddle has sufficient propelling power in water and is high in water-air transition efficiency. The invention also provides an unmanned aerial vehicle equipped with the efficient propelling folding paddle.

A propeller. The blades of the propeller are characterized by a blade center axis which corresponds to a generator line of a cone to which the blade, or blade thrust surface, conforms. The propeller hub is fixed to the blade at the root, in line with the blade center axis, such that the hub axis and blade center axis lie in the same plane, and the leading edge of the blade is positioned forward (referring to the upstream direction of movement caused by the propeller) of the trailing edge of the blade.

The invention relates to an array type underwater propeller with high maneuverability and low energy consumption, a pump jet generating device and a flow divider jointly form a propeller front end, an intelligent fluid director forms a propeller rear end, and the pump jet generating device drives an impeller through a rotating motor to drive surrounding water flow to rotate to generate a main jet flow; an isolation structure is arranged in the flow divider and used for evenly dividing the main jet flow into multiple strands of independent sub jet flows, and all the sub jet flows form propelling power after entering the intelligent flow guider to be guided. The intelligent fluid directors are connected with the flow channels of the flow divider in a one-to-one correspondence mode and used for converting fluid flowing out of the flow divider and out of the jet flow face into effective action jet flow with the adjustable flow speed. The intelligent fluid director comprises a jet flow end regulation and control mechanism and a pressure relief end regulation and control mechanism, and the jet flow end regulation and control mechanism is used for independently regulating the flow speed of effective jet flow ejected from the fluid director; and the pressure relief end regulation and control mechanism is used for maintaining the constant flow velocity at the inlet of the fluid director by releasing part of water flow when the effective jet flow velocity is regulated.

A swimming pool cleaner is provided, which includes a housing, a travelling device and a filter screen, two groups of power components with opposite driving directions are provided inside the water outlet chamber, the power component includes an impeller and a water outlet channel, wherein the water outlet channel includes a spiral portion and a linear flowing portion which are sequentially communicated, the linear flowing portion is connected with the water outlet, and the linear flowing portion deflects to the outer side in the spiral direction of the spiral portion, a steering stressed portion is formed at the junction of the linear flowing portion and the spiral portion, and the water outlet is in communication with an outside of the housing and faces towards a direction that is opposite to the travelling direction of the travelling device.

A hydrofoil vehicle comprises a frame and at least one foil. The vehicle comprises a moveable control surface configured to control a pitch of the vehicle, in use. A locking mechanism is provided for restricting movement of the control surface when the vehicle is not foiling, for example during launching. In examples, the locking mechanism activates automatically when the hydrofoil vehicle is not foiling. In examples, the vehicle is human powered.

The invention provides a blade-fused full-rotation shaftless rim propeller, and relates to the technical field of propellers, the blade-fused full-rotation shaftless rim propeller comprises a propeller body, the propeller body comprises a propeller shell, a first driving mechanism and a blade assembly, and the propeller shell is provided with a cylindrical mounting shell and a containing space located on the inner side of the mounting shell; the first driving mechanism comprises a stator assembly and a rotor assembly which are coaxially arranged on the inner side of the accommodating space; the paddle assembly comprises a plurality of main paddles and a plurality of auxiliary paddles, the main paddles are evenly distributed along the inner circumference of the rotor assembly, the guide edges of the main paddles are of zigzag bionic structures, the auxiliary paddles are located between the adjacent main paddles, the chord length of the auxiliary paddles is 30%-50% of the chord length of the main paddles, and the front edges of the auxiliary paddles are arranged close to the guide edge sides of the main paddles. Through the collaborative design of the main paddle and the auxiliary paddle, the sawtooth-shaped guide edge is used for damaging the vortex continuity, the auxiliary paddle guides secondary flow and inhibits pressure fluctuation, and the technical problems that a traditional propeller is high in noise, low in efficiency and disordered in flow field in a closed flow channel environment are solved.

The invention provides a flap propeller which comprises a propeller hub, a propeller shaft connected with one end of the propeller hub and a plurality of blades arranged on the propeller hub and evenly arranged at intervals in the circumferential direction of the propeller hub, a mounting groove is formed in the side, facing the adjacent blade, of each blade, and a flap is arranged in each mounting groove. The flaps are rotationally connected with the corresponding blades and / or the propeller hubs; the flap propeller further comprises a rotation driving assembly, and the rotation driving assembly is arranged on the propeller hub and connected with the flap so as to drive the flap to rotate relative to the propeller blades. The device can adapt to various navigation working conditions, reduces the loss of ship energy and inhibits the cavitation phenomenon.

The invention discloses a shaftless rim propeller with bearing and motor integrated driving steering. The shaftless rim propeller comprises a full-rotation device and a shaftless rim propelling unit. The full-rotation device comprises a main shell assembly and a full-rotation motor, the full-rotation motor is sleeved with the main shell assembly, the full-rotation motor comprises a water-lubricated bearing rotor and a first permanent magnet, and the first permanent magnet is embedded into the water-lubricated bearing rotor; the shaftless rim propelling unit comprises a propeller shell assembly, a spherical driving motor and blades, the propeller shell assembly is arranged on the outer side of the spherical driving motor in a sleeving mode and connected with the main shell assembly, and the spherical driving motor is in transmission connection with the blades. The structure of the full-rotation device is simplified, the structure is compact, a transmission mechanism is omitted, the full-rotation device is driven by the motor, and the full-rotation efficiency of the full-rotation device is improved. The three-degree-of-freedom rotation characteristic of the spherical motor is utilized, the propelling direction of propagation is adjusted in any direction, the propelling efficiency is improved, and the maneuverability of the ship under the non-design working condition is improved.

The invention discloses an air-water rotating speed coordination vector propeller based on a one-way transmission and a variable pitch structure, belongs to the field of application of water-air cross-domain aircrafts, and aims to solve the problem that a propelling device of an existing water-air cross-domain aircraft is difficult to switch working rotating speeds and adjust working postures in two fluids. In order to solve the problem of low navigation efficiency of the water-air cross-domain aircraft, the invention firstly provides a mode of coupling a one-way speed change module, a vector platform module and a variable-pitch paddle module to construct the propulsion device of the water-air cross-domain aircraft. Wherein the one-way speed change module can provide a high-speed rotating speed or a low-speed rotating speed for a transmission part at the platform end of the vector platform module according to forward rotation or reverse rotation of a driving motor, and the vector platform module is used for adjusting the overall working angle of the variable-pitch paddle module and adjusting the overall movement posture and movement trajectory of the aircraft. And the variable-pitch blade module is used for adjusting the working angle of a propeller blade carried by the variable-pitch blade module. The propulsion device is mainly used as a propulsion device of a water-air cross-domain aircraft.

The shaftless propeller comprises a motor shell, a rotating cylinder, the hub-free guide vane, a steering nozzle and a sealed bearing assembly, the motor shell coaxially sleeves the rotating cylinder, an annular motor used for driving the rotating cylinder to rotate is arranged between the motor shell and the rotating cylinder, and the hub-free guide vane is arranged between the motor shell and the rotating cylinder. The rotating cylinder comprises a plurality of blades arranged on the inner wall of the rotating cylinder and a distance adjusting mechanism used for changing the pitch of the blades in the operation process, and the hub-free guide vane is fixedly arranged at a water inlet in the front end of the rotating cylinder and used for conducting pre-rotation rectification on water flow entering the rotating cylinder so as to counteract the circumferential induced speed generated by the rotating cylinder. The steering nozzle is arranged at the outlet end of the rotating cylinder and can be driven to deflect around the axis so as to change the jet flow direction, and the sealing bearing assembly is arranged between the motor shell and the rotating cylinder and used for supporting the rotating cylinder and preventing fluid from invading the interior of the motor shell; the propulsion efficiency can be improved, the vibration noise can be reduced, and the steering function can be integrated.

The invention discloses a ship propeller energy-saving rectifying device with diversion wings, and particularly relates to the technical field of ships, the ship propeller energy-saving rectifying device comprises a ship body, a driving rod is arranged at the rear end of the ship body, a propeller is arranged at the rear end of the driving rod, and a plurality of diversion wings are fixedly installed on the outer wall of the driving rod in an annular array mode. An L-shaped fixing support is arranged above the driving rod, the L-shaped fixing support is installed on the rear side of the ship body, a rectifying mechanism is installed at the bottom end of the vertical position of the L-shaped fixing support, the rectifying mechanism comprises an annular flow guide cover, and the propeller is located on the inner side of the annular flow guide cover. According to the ship propeller energy-saving rectifying device with the flow guide wings, through the synergistic effect of the flow guide wings and the rectifying mechanism capable of being dynamically adjusted, the inflow condition of the disc face of the propeller is improved, pre-rotation and non-uniformity of water flow are effectively weakened, and therefore the propelling efficiency of the propeller is improved, and fuel consumption and operation cost are reduced.

The invention relates to the technical field of energy-saving devices in the field of ship engineering, and discloses an annular fin blade propeller cap turbine and a ship hull. The annular fins are uniformly distributed on the periphery of the light cap; the wing-shaped rotating direction of the annular fin blades is consistent with that of the propeller; the annular fin blades and the light caps form an annular closed area, and tip leakage is prevented. The annular fin tip prevents tip discharge, flow fields of the front fin blade and the rear fin blade are separated in advance near the annular fin tip, and cannot be fused to form vortex after being transversely scattered by the fin tip, so that the energy-saving effect is enhanced.

The differential pressure driven propeller micro-nano air curtain noise reduction system comprises a gas-liquid mixing cavity and a high-speed stirrer, and the gas-liquid mixing cavity is arranged in the internal space of the tail of an aircraft; the high-speed stirrer is arranged in the gas-liquid mixing cavity; the gas-liquid mixing cavity is provided with a gas inlet, a water inlet and a micro-nano bubble outlet, the diameter of the water inlet is D1, and the diameter of the micro-nano bubble outlet is D2; the included angle between the tangent line of the molded line at the micro-nano bubble outlet and the central axis of the aircraft is alpha, and the angle between the micro-nano bubble outlet and the central axis of the aircraft is-alpha; the center-to-center distance between the water inlet and the micro-nano bubble outlet is D3, and D3 is larger than 6 * D1 and larger than 3 * D2; when the spraying speed V3 of the micro-nano bubbles is equal to V / cos alpha, the micro-nano bubbles enter a potential flow area and spread downstream along the streamline of the aircraft, and a micro-nano air curtain is formed and wraps the periphery of the propeller. A micro-nano air curtain is formed around the propeller, acoustic impedance is increased to cause acoustic wave transmission loss, and the radiation noise of the propeller is reduced.

The variable-configuration multi-purpose robot comprises a robot body and the wheel-claw-paddle composite mechanism, the robot body comprises a robot body, an upper cover plate and two side plates, the upper cover plate is fixed to the robot body, and the two side plates are rotatably arranged on the two sides of the cover plate through two hinges correspondingly; the hinge is a rotary damping adjustable hinge; the wheel-claw-paddle composite mechanism is allowed to be switched between a wheel-claw-paddle state and a wheel-type state, the wheel-claw-paddle composite mechanism is arranged on the side plate so that the side plate can rotate and be locked relative to the upper cover plate within a set angle range, and then the whole machine can be switched among a flight mode, a ground mode and a water surface mode. The device can adapt to water, land and air triphibian environments at the same time and is integrated with light-weight design.

The present invention is an amphibious detection snake based on bionics. The present invention relates to the technical field of amphibious detection snakes. The present invention is mainly composed of an STM32F103ZET6 single-chip microcomputer main control component, a MIPI camera, an ESP8266WIFI module, a universal wheel, a servo, etc. The present invention can automatically switch between land mode and water mode according to changes in the external environment. When in land mode, the driving motor is driven by the main control component, and the rotation of the servo between the snake joints drives the universal wheel to generate forward rotational power, thereby realizing two-dimensional forward movement. When in water mode, the propeller automatically pops up, and multi-dimensional movement can be realized quickly. The camera detects real-time images in the water and transmits data to the remote control terminal according to the serial communication protocol. Based on the bionic principle, the present invention imitates the movement posture of the snake during movement to have better camouflage, and can realize reconnaissance and detection in a variety of environments.

The present invention relates to the field of marine surveying and mapping, and specifically to a marine surveying and mapping positioning device, which includes a bearing plate. A waterproof cover is installed at the top of the bearing plate. One end of the rotating rod penetrates the rear side wall of the inner top wall of the first cavity and is fixedly connected with a plurality of spiral blades at equal angles. A second cavity is formed in the inner wall of the weight block, and a positioning component is installed inside the second cavity. A crushing component is installed on the side wall of the rotating rod, and a repair component is installed on the side wall of the spiral blade. By setting the positioning component, through the operation of the motor, the rotating rod and the spiral blades are driven to rotate. Using the thrust generated by the rotation of the spiral blades, the device is driven to move towards the seabed. By pushing the device downward through the spiral blades, the device dives vertically to a great extent, avoiding displacement and even deviation from the surveying area of the surveying device under the action of seawater flow, ensuring that the device can be accurately placed within the surveying range, and improving the practicability of the device.

Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.

A ship propulsion machine (1) includes a propeller (2), an engine (4) configured to rotate the propeller (2), the engine (4) serving as a first power source, a motor (17) configured to rotate the propeller (2), the motor (17) serving as a second power source, an inverter (19) configured to control driving of the motor (17), an engine drive shaft (21) connected to a crank shaft (6) of the engine (4), a motor drive shaft (22) connected to an output shaft (18) of the motor (17), a transmission shaft (23) connected to a propeller shaft (3) provided with the propeller (2), and a power switching mechanism (24) configured to switch a connection mode of the engine drive shaft (21), the motor drive shaft (22), and the transmission shaft (23) to switch a power source for rotating the propeller (2) between the engine (4) and the motor (17).

The purpose of the present invention is to provide a hull-direct-connection-type propulsion device of a contra-rotating propeller and a method for manufacturing the same, the propulsion efficiency of an electrically propelled ship being greatly improved by disposing the contra-rotating propeller attached to the electrically propelled ship so as to be directly connected to the hull. In order to achieve the purpose, the hull-direct-connection-type propulsion device of the contra-rotating thruster according to the present invention comprises: a contra-rotating thruster comprising a front propeller and a rear propeller; a dual-rotor motor for generating respective rotation directions of the front propeller and the rear propeller; and the double shafts are used for connecting the contra-rotating thruster and the double-rotor motor.

An end cap for guiding an exhaust gas flow of a boat engine. The end cap is configured to be attached onto a propeller nut of the boat engine. The end cap including: a base body having a bottom surface, a lateral surface and a tip, the tip and the bottom surface being spaced apart from each other in a longitudinal direction of the base body. The lateral surface extends from the bottom surface and converges in the tip. The bottom surface having a recess for receiving the propeller nut; and at least one exhaust gas-guiding structure extends helically along the lateral surface.

A variable toroidal propeller (10) is proposed, comprising a hub (12) and toroidal propeller blades (14) connected to the hub (12). The hub (12) is configured to operably couple the blades (14) to an actuator (44), and the blades (14) are configured to deform when the actuator (44) is operated.

The utility model discloses a quickly fixed paddle board propeller which comprises a driving motor, a rotating seat is arranged on an output shaft of the driving motor, a plurality of paddles are movably connected to the rotating seat, and a quick fixing assembly is arranged at the rear end of the driving motor. The rapid fixing assembly comprises a fixing base fixed to the rear end of the driving motor, a clamping plate arranged behind the fixing base at intervals, and an elastic belt connected between the fixing base and the clamping plate. The utility model has the advantages that the installation is simple and convenient, and the resistance in a non-propulsion state can be effectively reduced.

A kind of assembly method of paddle hub, the method includes the following steps: first step: repair sliding block inner hole, the gap value of the outer circle of crank pin on crank disc and inner hole meets the inspection standard;Second step: repair sliding block and the sliding block groove on piston rod, so that it meets the requirement;Repair groove sliding block or sliding block groove until the gap value meets the inspection standard;Third step: the paddle shell is connected with hollow support, then install crank disc, fix the crank pin on the upper end of crank disc, then sliding block is sleeved on the outer circle;Fourth step: piston rod drops into the paddle shell, after sliding block enters sliding block groove, make the vertical movement stroke of sliding block and crank pin be synchronous with piston rod drop, piston rod stops descending after descending to appropriate position, then fix crank disc;Fifth step: other parts in the assembly of paddle hub.The design sets the test index between crank pin, sliding block and piston rod to improve the operation accuracy of mechanism.Therefore, the assembly quality of the paddle hub of the design is high.

The present invention discloses a drag-reducing and friction-reducing bionic texture for wading, comprising a base material and a plurality of bionic protrusions provided on the surface of the base material. The bionic protrusions are generally fan-shaped columns, and a curved groove is provided downwardly at the top of the fan-shaped column. The curved groove has a concave steep slope on the side close to the axis of the fan-shaped column, and a concave gentle slope on the side close to the arc surface, forming a vortex groove as a whole. The intersection of the plane passing through the axis of the fan-shaped column and the curved groove is defined as a longitudinal section. All longitudinal sections of the fan-shaped column are the same. The top curve of the longitudinal section is a concave steep slope curve near the center of the fan-shaped column, and a gentle slope curve on the other side. Because the curved groove has a significant vortex effect, the drag-reducing and friction-reducing bionic texture can form a vortex in the seawater environment by flowing seawater, thereby forming a roller effect, converting sliding friction into rolling friction, and enhancing the fluid dynamic pressure effect, with a friction coefficient reduction rate of more than 60%.

The invention provides an underwater propulsion vehicle device with high steering efficiency and low noise, and belongs to the technical field of underwater vehicle propulsion. The invention aims to meet the requirement of changing various sailing postures of the aircraft and ensure high steering efficiency and low noise. The sealed cabin comprises a sealed cabin body, a signal assembly, a lifter assembly and a propeller assembly. The signal assembly and the lifter assembly are installed on the sealed cabin body, and the propeller assembly is installed at the tail of the sealed cabin body. The thruster assembly comprises a rim thruster, a propeller, a transmission shaft component and a rudder component; the transmission shaft component is installed at the tail end of the sealed cabin body, and the propeller is installed on the transmission shaft component. The four rim propellers are distributed in a cross shape, connected with the sealed cabin body through rudder components and installed at the tail contraction position of the sealed cabin body. The condition of unreasonable layout of the rudder and the propeller at the tail contraction section of the aircraft is effectively improved, the problems of flow field disturbance and mutual interference caused by too close distance between the rudder and the propeller are avoided, the propelling efficiency is improved, and the flow noise is reduced.

The utility model relates to a controllable-pitch propeller outer blade pitch transmission equal-proportion conversion device which comprises blades, a propeller hub, an oil pipe and an oil distributor, the propeller hub is connected with the blades and used for driving the blades to rotate, and the propeller hub is connected with the oil distributor through the oil pipe and used for achieving the purpose that the rotation angle of the blades in the propeller hub is equal to the rotation angle of a signal output shaft of the oil distributor. Therefore, the pitch angle of the blade is controlled in real time. The controllable-pitch propeller outer blade pitch equal-ratio device can accurately track angle positions of underwater blades under different working conditions (different pitch positions), and stable control over controllable-pitch propeller devices on the left side and the right side of a ship is achieved. By designing the controllable-pitch propeller outer blade pitch equal-ratio device, the health state of the controllable-pitch propeller device can be monitored in real time, and fault positions of a mechanical system, an electric control system and a hydraulic system are transmitted and locked through accurate pitch indication, so that the maintenance time is shortened.

The utility model discloses an offset type propeller front energy-saving device which comprises an offset type circumferential guide vane and a plurality of radial guide vanes, the offset type circumferential guide vane is provided with an offset circle center, the offset circle center deviates from the axis of a propeller, and the radial guide vanes are arranged at intervals in the circumferential direction and fixedly connected with a ship body. The offset type circumferential guide vane is located above the horizontal plane where the axis of the propeller is located and does not exceed the boundary swept by the outer edge of the rotating propeller; when the propeller is a right-handed propeller, the offset circle center is located on the upper left portion of the axis of the propeller, and the offset type circumferential guide blades are arranged in the mode that the whole offset type circumferential guide blades deflect towards the upper left portion. Or when the propeller is a left-handed propeller, the offset circle center is located on the upper right portion of the axis of the propeller, and the offset type circumferential guide blades are arranged in the mode that the whole offset type circumferential guide blades deflect to the upper right portion; the left upper direction and the right upper direction are defined by the view angle of the ship advancing direction. The device acts on water flow and adjusts the direction of the water flow to reduce eddy current and energy loss, so that the propeller can operate under more ideal conditions.

The application provides a scalable propeller hub cap fin for a ship, and belongs to the field of ship propulsion. The application solves the problem of poor energy-saving effect of a traditional cap fin in the whole voyage. The application comprises a propeller hub, a plurality of blades which are uniformly distributed on the propeller hub, a propeller hub cap which is arranged at the rear end of the propeller hub, a plurality of fin blades which are arranged one by one and correspond to each blade, all the fin blades are in sliding connection with the propeller hub, and a hydraulic adjusting device which is arranged in the propeller hub cap and is used for driving each fin blade to extend out of the propeller hub or retract. The application is mainly used for changing the running state of the propeller.

The utility model discloses a surfboard high-speed paddle structure, which belongs to the technical field of surfboard paddles, and comprises a shaft connecting sleeve, three groups of paddles are arranged on the outer side surface of the shaft connecting sleeve in an annular array manner, and drainage grooves are formed in the upper and lower sides of the connecting surfaces of the three groups of paddles and the shaft connecting sleeve; the front end of each drainage groove extends out of the front end of the corresponding paddle by one section, and the rear end of each drainage groove is flush with the rear end of the corresponding paddle. The drainage grooves can overflow a part of vortex rotating along with the blades, so that the resistance of the blades during rotation is reduced, the rotation speed of the blades is higher, the drainage grooves are arranged on the three groups of blades, the mutual influence among the blades is effectively reduced, the rotation of the blades can break through the original speed limitation, and the rotation speed of the blades is improved. And a faster speed is provided for the surfboard.

A marine propulsion apparatus includes a lower unit, the lower unit includes a center body. The center body includes a leading edge disposed at a first end of the center body and a trailing edge disposed at a second end of the center body, defining a substantially cylindrical portion therebetween. The lower unit includes a modular nose cone member releaseably coupled to the leading edge of the center body, the modular nose cone further including a first curved conical surface and a first mating surface. The lower unit includes a modular tail cone member releaseably coupled to the trailing edge of the center body, the modular tail cone further including a second conical surface and a second mating surface, the second mating surface oriented forwards and parallel to the first mating surface. The lower unit includes a skeg affixed to a bottom side of the center body.