53 results about "Jet propulsion" patented technology

The invention discloses a bionic underwater robot based on electromagnetic drive flexible hinge jet propulsion and a motion control method of the bionic underwater robot, and belongs to the technical field of bionic actuators and robots. The multiple electromagnetic actuators arranged in a matrix mode are sequentially connected to form a hinge structure, every two vertically adjacent electromagnetic actuators are symmetrically arranged, the multiple electromagnetic actuators are all arranged on the rear side of the fairing and connected with the fairing through connecting pieces, and the multiple electromagnetic actuators are independently controlled; the comprehensive phase difference and the reversing time difference of the multiple electromagnetic actuators are controlled through the electromagnetic driving controller, differential propulsion is achieved, and flexible steering and efficient movement are achieved. The overall structure simulates the jellyfish appearance design, the appearance design conforming to the flowing resistance reduction characteristic is adopted, the resistance during movement in water can be effectively reduced, the electromagnetic driver is used for generating power, the annular flexible structure is extruded to enable a fluid medium to be rapidly sprayed out, and efficient underwater propelling of the micro-robot is achieved.

A jet propulsion boat includes: a boat body; a propulsion device that imparts propulsion force to the boat body to propel the boat body; an engine and an electric motor that drive the propulsion device; and a control device that determines which of an engine mode and an electric mode is to be used as an operation mode of driving the propulsion device in accordance with a condition, the engine mode configured to drive the propulsion device with the engine and the electric mode configured to drive the propulsion device with the electric motor while stopping the engine, and controls the engine and the electric motor to drive the propulsion device in the determined operation mode.

The utility model discloses a model machine for simulating the principle of a jet propulsion device, which relates to the field of jet propulsion device structures, and comprises a device main body, a servo motor is arranged in the device main body, an air filter matched with the servo motor is arranged in the device main body, the servo motor is connected with a single plunger type cylinder through a crank connecting rod mechanism, and the single plunger type cylinder is connected with the air filter. A displacement sensor is arranged at one end outside the single plunger type cylinder, a water tank is arranged outside the device body, and the water suction end of the single plunger type cylinder is connected with the output end of the water tank through a pipeline. According to the utility model, the servo motor operates, and the crank-link mechanism drives the single plunger cylinder to move. When a plunger rod of the single-plunger cylinder extends out, water in the water tank is sucked into the single-plunger cylinder through the water suction filter, the stop valve, the shock-proof throat and the water suction one-way valve in sequence, in the process, the rotating motion of the motor is successfully converted into the linear motion of the plunger cylinder, stable water suction is achieved, and meanwhile the water suction efficiency is improved by means of all the components. Water is effectively filtered, liquid flow is flexibly controlled, pipeline vibration is reduced, and liquid backflow is prevented.

The invention discloses a compressible fluid reducing vortex method and device, and belongs to the technical field of fluid machinery and jet propulsion. The problems that in the prior art, the energy loss is large, the efficiency is low, and the gas temperature is sharply increased in the compression process are solved. Efficient and controllable conversion among fluid pressure energy, internal energy and kinetic energy can be achieved, an air injection device based on the method can more fully convert heat energy into directional injection kinetic energy through the synergistic effect of acceleration and vortex elimination guide vanes, and the propelling efficiency is remarkably improved; and the stable recovery and conversion of kinetic energy are realized through vortex expansion, and an approximately isentropic mild pressurization process can be realized, so that the temperature rise is obviously inhibited, and the compression energy consumption and the cooling requirement are fundamentally reduced.

The utility model relates to a bionic lobster propeller based on a single-degree-of-freedom connecting rod, which comprises a lobster-head-shaped control cabin and a lobster-tail-shaped bionic jet propulsion unit, the lobster-head-shaped control cabin is used for integrating a power unit and providing installation support, and the rear part of the lobster-head-shaped control cabin is hinged with the lobster-tail-shaped bionic jet propulsion unit; and the shrimp-tail-shaped bionic jet propulsion unit is used for straightening energy storage and bending the reciprocating motion of jet to generate propulsion force. The bionic lobster propeller has the advantages that vortex ring jet flow is generated through bionic lobster tail movement, the hydrodynamic efficiency is remarkably improved, and the energy utilization rate is higher than that of a traditional propeller.

The application relates to a pulse jet propeller driven by a polyvinyl chloride electroactive gel material, belonging to the jet propulsion technical field; the propeller comprises a shell and a collapsible cabin arranged in the shell; one-way diaphragm pumps in communication with the collapsible cabin are arranged at the head / tail ends of the shell, water flows into the head end and is sprayed out of the tail end; clamping plate type driving modules are arranged on the two sides of the collapsible cabin; the collapsible cabin is compressed by applying a normal clamping force to the two side walls of the collapsible cabin, fluid in the cabin is extruded and sprayed out to complete a pulse jet propulsion action. The application realizes the water absorption and water spraying action of imitating a squid, and can complete flexible underwater movement and direction adjustment under low energy consumption.

This invention relates to the technical field of power devices and discloses a jet power device, including a cylindrical body with a cavity, a main shaft in the cavity, a compressor and a turbine connected to the main shaft to form a rotor; a diffuser, a guide vane and a burner rotatably connected to the main shaft to form a stator; a tail cone fitted with a tail nozzle to form a tail nozzle channel; air is compressed into high-pressure gas by the compressor, and the high-pressure gas enters the combustion chamber through the diffuser; fuel is atomized into fuel gas through an evaporator, and the atomized fuel gas mixes with the high-pressure gas in the combustion chamber to form an oil-gas mixture, which burns in the combustion chamber to form high-pressure fuel gas, which drives the turbine to rotate after passing through the guide vane, and the fuel gas passing through the turbine is ejected at high pressure from the tail nozzle channel to generate forward thrust. The turbine's work drives the compressor to rotate through the main shaft, and continues to compress air into the air inlet, forming a compression-expansion cycle, which maintains stable operation on its own.

The application relates to a thrust chamber of a jet propulsion device and an adaptive flame stabilizer thereof. The adaptive flame stabilizer comprises two side plates connected in rotation, an oil injection rod and a linkage mechanism. The oil injection rod is arranged between the two side plates, and a first nozzle is arranged on the oil injection rod. The linkage mechanism comprises an extension assembly and two linkage assemblies. One end of the extension assembly is communicated with the first nozzle, and the other end of the extension assembly is rotatably connected with the two linkage assemblies respectively. The ends of the two linkage assemblies away from the extension assembly are rotatably connected with the two side plates respectively. The adaptive flame stabilizer has a thrust state and a non-thrust state. In the thrust state, the oil injection rod sprays oil to the first nozzle, and the extension assembly is elongated to drive the two side plates to rotate to the side away from each other through the two linkage assemblies respectively. In the non-thrust state, the extension assembly is retracted to drive the two side plates to rotate to the side close to each other through the two linkage assemblies respectively.

The invention discloses a bladeless water jet propulsion device, and relates to the technical field of ship engineering or underwater propulsion, the bladeless water jet propulsion device comprises a support and a shell, the shell is provided with two fluid inlets and outlets, and the two fluid inlets and outlets are respectively a water inlet and a water jet; the shell is internally provided with a pressurizing chamber, the pressurizing chamber is communicated with the water inlet and the water injection nozzle, and the shell is rotationally connected with a crankshaft and a double-cavity partition plate which are coaxial with the pressurizing chamber; the two sides of the crankshaft are each fixedly provided with two peristaltic wheels, and the peristaltic wheels located in the portions, on the two sides of the double-cavity partition plate, of the pressurizing cavity are coaxially arranged on the crankshaft. The pressurizing chamber is in a cylindrical shape, and the peristaltic wheel is in a cylindrical shape. According to the novel blade type propeller, the inherent technical problem of a traditional blade type propeller is fundamentally solved, the safety, reliability and environmental adaptability of equipment are remarkably improved, and due to the fact that exposed rotating blades are abandoned, the propelling failure or overload risk caused by the fact that the blades are wound by sundries such as aquatic plants, fishing nets and floating objects is thoroughly eliminated.

The invention discloses a state self-detection and fault self-diagnosis method for a water jet propulsion main control unit, which comprises the following steps of: performing component characteristic analysis, fault mode analysis, optimal measuring point set selection and measuring point simulation value obtaining on a main control unit circuit to obtain a main control unit fault mode table, and finally forming a fault diagnosis process according to the main control unit fault mode table. Therefore, the reliability of the water-jet propulsion device is improved, a health management system of the water-jet propulsion device can be established, and fault diagnosis and fault monitoring are carried out on the water-jet propulsion device of the whole ship.

A jet propulsion boat includes a boat body; a main propulsion device including a jet device that jets a jet water stream from the boat body, and a direction change device that changes, in a lateral direction, an orientation of the jet water stream having been jetted; an auxiliary propulsion device provided on the boat body to impart a propulsion force in a lateral direction to the boat body; and a control device that controls the main propulsion device and the auxiliary propulsion device, and switches a control mode of the main propulsion device and the auxiliary propulsion device between a plurality of modes, in which the control mode includes a main control mode for driving the main propulsion device and stopping the auxiliary propulsion device to move the boat body, and a combined mode for driving both the main propulsion device and the auxiliary propulsion device to move the boat body.

The present invention provides a jet propulsion system, a jet-propelled boat, and a boat hull launching method that enable easy launching of the boat hull from a trailer. [Solution] This jet propulsion system 100 includes a jet propulsion mechanism 4 that generates thrust by ejecting a jet of water from the nozzle 44a, which is located at the stern 114 of the hull 110 and includes a nozzle 44 provided with a jet water nozzle 44a, a nozzle actuator 5a that rotates the nozzle 44 to change the direction of the jet water from the nozzle 44a, and a control unit 8 that performs oscillation control by repeatedly oscillating the nozzle 44 using the nozzle actuator 5a when lowering the hull 110 from the trailer T.

The present application relates to the field of jet propulsion technology, and provides a micro-mixing nozzle structure with staggered outlet velocity and a combustion chamber. The micro-mixing nozzle structure comprises a mounting seat and a first nozzle unit; the first nozzle unit comprises a plurality of side-by-side arranged premixing micro-pipes, among which a part is reference position premixing micro-pipes and the other part is staggered position premixing micro-pipes; along the axial direction of the premixing micro-pipe, the premixing micro-pipe has an inlet end, an outlet end and a gas passage; the inlet end is provided with an oxidant inlet, and the side wall of the premixing micro-pipe is provided with a fuel inlet communicating with the gas passage; the effective areas of the oxidant inlets corresponding to the staggered position premixing micro-pipes and the reference position premixing micro-pipes are different, so that the jet velocities of the outlet ends of the staggered position premixing micro-pipes and the reference position premixing micro-pipes are different. The present application arranges the different premixing micro-pipes in a staggered manner according to the jet velocity, realizes the staggered arrangement of the flame delay time of the different premixing micro-pipes, effectively suppresses the combustion oscillation, and can ensure the stability of the flame combustion.

The invention discloses a dynamic characteristic testing device and method for a water jet propulsion steering and backing mechanism, and the device comprises a steering and backing mechanism model which is fixedly hung below a piezoelectric three-component dynamic force testing platform. The steering and backing mechanism model and the piezoelectric type three-component dynamic force measuring table are both arranged in the circulating water tank test section, a rudder angle control motor is arranged above the circulating water tank test section, the driving end of the rudder angle control motor is connected with a rotating shaft which drives the steering and backing mechanism model to rotate, the rudder angle control motor is connected with a motor controller, and the motor controller is connected with the piezoelectric type three-component dynamic force measuring table. And a plurality of three-way acceleration sensors for collecting the vibration acceleration of the steering and backing mechanism model are arranged on the steering and backing mechanism model. Synchronous testing of three-direction dynamic force and three-direction vibration acceleration of the steering and backing mechanism in different rudder angle and backing bucket angle operation states can be achieved, and meanwhile the testing device is simple in structure, reasonable in design and convenient to mount and dismount.

The invention discloses a thruster with a magnetically-coated cusped Laval nozzle. The thruster comprises an injection unit, a combustion chamber, the magnetically-coated cusped Laval nozzle and a hollow cathode, the magnetic coating cusped type Laval nozzle comprises a Laval nozzle body and a magnetic coating cusped type assembly. The Laval nozzle comprises a metal shrinkage pipe and a ceramic expansion pipe which are sequentially arranged in the axial direction. The periphery of the ceramic expansion tube is coaxially sleeved with the magnetic coating cusped assembly, and the magnetic coating cusped assembly comprises N stages of permanent magnets and N-1 spacer rings; the hollow cathode is arranged on the outer side of the tail end of the ceramic expansion tube. The magnetic-coated cusped Laval nozzle is adopted, a cusped field is introduced, rapid switching between a chemical direct-current propulsion mode and a magnetic jet propulsion mode can be achieved, and when the thruster needs rapid maneuvering orbital transfer, the chemical direct-current propulsion mode is adopted, and 10N-level thrust can be provided; when the thruster operates in a low orbit and needs to maintain the orbit height, a magnetic jet propulsion mode is adopted to generate thrust in a set direction, so that the orbit height of the satellite is kept unchanged.

A reverse bucket for a jet propulsion device includes a vertical ridge line that faces a discharge opening of a deflector to make a marine vessel move backward, a first inlet region and a second inlet region separated by the ridge line to receive water discharged from the discharge opening, first and second outlet regions to discharge the water received by the first and second inlet regions to the outside, and first and second guide regions to guide the water received by the first and second inlet regions to the first and second outlet regions. The first inlet region, the first guide region, and the first outlet region define a first recess portion including a first opening that faces the discharge opening. The second inlet region, the second guide region, and the second outlet region define a second recess portion including a second opening that faces the discharge opening.

The invention discloses a fuel supply control system and method for a jet propulsion device, belongs to the technical field of fuel supply control devices for air combustion-supporting jet propulsion devices, and can solve the background problems that a turbofan is used for exhausting air when an existing jet propulsion engine is used, and the turbofan is limited by the rotating speed of a driving motor in the mode; the problems that when the rotating speed reaches the limit, the air inflow cannot be increased, and when an existing fuel supply system suddenly increases the air inflow, fuel supply is insufficient, and then engine surge is caused are solved. The method comprises the steps that an air compressor is powered on, air is sucked and fed into a combustion section through an air inlet section, and fuel enters a fuel cavity through a fuel inlet; the ignition device is electrified to burn the fuel, and the fuel is sprayed out through the tail spraying section along with air flow; an electric telescopic rod is electrified to drive a barrier plate to rotate to increase the air inflow; and the fuel making pump is started to feed the fuel in the fuel cavity into the other fuel pipe to increase the supply of the fuel.

The present invention provides a jet propulsion system and a jet-propelled boat that enable the operator on board to immediately correct any unintended movement of the hull caused by radio control. [Solution] This jet propulsion system 100 comprises a jet propulsion mechanism 4, a jet water flow modification operation unit 6a that controls the movement of the hull 110 by changing at least one of the magnitude of the thrust force of the jet water flow, the left-right direction of the jet water flow, and the front-rear direction of the jet water flow, a wireless control device 2 that instructs the movement of the hull 110, and a control unit 8 that, when in wireless control mode, cancels wireless control mode and forcibly switches to manual control mode in which the hull 110 is moved by operation of the jet water flow modification operation unit 6a by the operator U1 based on the operation of the jet water flow modification operation unit 6a by the operator U1.

The invention relates, inter alia, to a bow module (30) for a modular watercraft (20). The watercraft (20) includes interconnectable modules including a stern module (22) and a bow module (30), which can be releasably connected by means of a first connection mechanism (26). The stern module (22) is connectable to a jet-propulsion module (24). The bow module (30) has a connection element (40) and a float (50). The connection element (40) is connectable to the stern module (22) by means of the first connection mechanism (26) and a dimensionally stable float receptacle (42) for receiving the float (50). The float (50) is inflatable by means of compressed air and is dimensionally stabilizable and, in an inflated state, is clampable or clamped into a recess (48) of the float receptacle (42).

A jet propulsion boat includes: a boat body; a jet water stream generation device that jets a jet water stream from the boat body to impart a propulsion force in a front-rear direction to the boat body; a steering device including a steering operator operated by a driver, and changes an orientation in a lateral direction of a propulsion force of the jet water stream generation device in response to an operation on the steering operator; an auxiliary propulsion device provided on the boat body to impart a propulsion force in a lateral direction to the boat body; and a control device that controls the auxiliary propulsion device based on an operation of the steering device.

According to the automatic cooling method for the gearbox of the water jet propulsion device, the impeller is driven to rotate through the main shaft of the gearbox, so that water flow enters the volute, high pressure is formed in the volute, and when the water flow passes through the jet holes, the water flow is jetted to the cooling copper pipe through the jet holes; lubricating oil in the cooling copper pipe exchanges heat with external high-pressure water flow; the oil pump of the lubricating oil is driven by the main shaft of the gear box, so that the rotating speed of the main shaft is higher, the flowing speed of water flow sprayed out of the cooling copper pipe is higher, the heat exchange efficiency is higher, the heat exchange efficiency of the cooling copper pipe is in direct proportion to the working rotating speed of the main shaft, and the working speed in the gear box is higher; and the heat exchange efficiency of the cooling copper pipe is higher.

This invention proposes a multi-directional pulse propulsion underwater soft robot and its operating method based on bistable SMA (Stable Motion Assisted Mullion) drive, belonging to the field of underwater robot technology. It solves the problems of slow swimming speed and low energy utilization efficiency of traditional underwater flexible soft robots, as well as the slow engine reset, requirement for a dedicated reset mechanism, inability to achieve continuous motion, and single-direction pulse jet propulsion of SMA-driven soft robots. The robot includes a biomimetic bell-shaped jar, a propulsion actuator, and a center-of-gravity adjustment mechanism. The biomimetic bell-shaped jar surrounds the propulsion actuator and the center-of-gravity adjustment mechanism. The propulsion actuator includes a support transmission structure and a bistable SMA actuator. The bistable SMA actuator includes two sets of SMA springs arranged in an antagonistic manner, achieving continuous pulse propulsion through alternating on and off-circuit power. The center-of-gravity adjustment mechanism includes an azimuth rotation component and a radial displacement component, achieving 360° omnidirectional center-of-gravity adjustment in the horizontal plane. It is mainly used for deep-sea exploration and continuous underwater monitoring operations.

An unmanned aerial vehicle (100) comprising: - a symmetrical fuselage (110) configured in a disc shape, having an upper section (114), a lower section (116), and an outer rim (115); - a jet propulsion system disposed within the fuselage and configured to generate axial thrust; - a stabilization and control system configured to regulate the orientation and position of the aerial vehicle when airborne; and - an energy supply system housed within the fuselage, configured to power the jet propulsion and the stabilization and control system; wherein the jet propulsion system is disposed along a central axis of the fuselage; and wherein the jet propulsion system comprises: - an air inlet positioned at a first end of the central axis, - an air outlet positioned at an opposite end of the central axis; and - a jet motor operably arranged between the air inlet and the air outlet; wherein the air outlet is configured to expel exhaust gases generated by the jet motor, thereby generating axial thrust; and wherein the fuselage (110) comprises a system of flaps (134, 150) embedded therein and configured to regulate airflow and facilitate precise control over the vehicle's (100) orientation.

A kind of jet propulsion device fuel supply control system and control method, air combustion-supporting jet propulsion device fuel supply control device technical field, can solve the problems raised in the background: the existing jet propulsion engine when using, the vortex fan is pumped, the vortex fan is limited by the drive motor speed, when the speed reaches the limit, it cannot increase the air intake problem, and the existing fuel supply system when suddenly increasing air intake, it will lead to fuel supply shortage and cause engine surge problem. The steps are: the air is sucked into the combustion section by the air intake section through the energization of the compressor, the fuel enters the fuel cavity through the fuel inlet; the ignition device is energized to make the fuel burn, and is ejected along with the air flow through the tail jet section; the electric telescopic rod is energized to drive the baffle to rotate and increase the air intake; the fuel pump is started to send the fuel in the fuel cavity to another fuel pipe to increase the fuel supply.

A water jet propulsion boat includes a hull, a drive source, a power storage, a jet propulsion mechanism, a power generator, and a controller. The hull includes a water inlet, a jet outlet, and a flow path connecting the water inlet and the jet outlet and including at least a main flow path extending from the water inlet to the jet outlet. The drive source is located in the hull, and the power storage supplies power to the drive source. The jet propulsion mechanism includes an impeller in the main flow path and driven by a driving force of the drive source to generate a water flow to generate a propulsive force to the hull. The power generator is located in the flow path and uses the water flow generated by the impeller to generate power. The controller charges the power storage with the power generated by the power generator.

The utility model discloses a comprehensive monitoring rack for the running state of a split mounting type water jet propulsion pump, which comprises an adjustable rack base and a plurality of sensors arranged on the adjustable rack base, the sensor comprises an axial displacement sensor assembly used for monitoring the displacement state of the impeller shaft, a rotating speed sensor assembly used for monitoring the rotating speed state of the impeller shaft, an orthogonal displacement sensor assembly used for monitoring the jumping state of the impeller shaft, and a three-way acceleration sensor used for monitoring the vibration state of the thrust bearing. And the temperature sensor is used for monitoring the temperature state of the thrust bearing. According to the utility model, comprehensive characteristic signals of vibration, temperature, displacement, rotating speed and the like of the water-jet propulsion pump are comprehensively monitored, the fault occurrence or hidden danger risk of the water-jet propulsion pump can be obviously reduced, and the testability and reliability of the water-jet propulsion pump are improved. The comprehensive monitoring rack can be installed on the water-jet propulsion pumps of various dimensions in a lossless mode through assembly of parts of different dimensions.

A front-stator pump-jet propulsion device and fluid analysis method, belonging to the field of underwater propulsion technology, includes: a duct, a hub, and a propulsion assembly. The duct, hub, and propulsion assembly are coaxially arranged, with the hub and propulsion assembly installed inside the duct. The propulsion assembly includes multiple stator blades and multiple rotor blades, with an odd number of stator blades, more stator blades than rotor blades. The stator blades are fixed to the leading edge region of the inner wall of the duct, and the rotor blades are mounted on the hub. The stator blades are located upstream of the rotor blades and form an axially connected series structure, collectively constituting the energy conversion unit in the flow channel inside the duct. This invention, through the combination of an odd number of stator blades and an asymmetric number of rotor blades, effectively suppresses harmonic resonance at the blade passing frequency, reduces the peak noise levels of the shaft frequency and blade frequency, improves the hydrodynamic performance of the pump-jet propulsion device under different operating conditions, reduces the excitation force and noise of the pump-jet propulsion device, and improves the stealth performance of underwater vehicles.

A jet propulsion system includes a housing and an impeller positioned within the housing interior. A nozzle is positioned at least partially downstream of the housing outlet and a deflector gate is positioned within the nozzle interior. The deflector gate has a first end, a second end and a pivot provided at the first end. The deflector gate is pivotable relative to the nozzle about a pivot axis defined by the pivot between a default position and a deflector position. The deflector gate in the default position having the second end downstream of the first end, and in the deflector position deflecting at least some of the water out of an opening of the nozzle in an upstream direction.

The invention provides a near space jet propulsion system based on a fuel cell and a propulsion method thereof, and belongs to the technical field of near space propulsion. The system comprises an inner shell, an outer shell, a fluid conveying system, a motor system, a porous structural body, a high-speed molecular-level rotating shaft pump, a precooler, a liquid hydrogen tank, a liquid oxygen tank, a high-temperature proton exchange membrane fuel cell, a tail gas collecting and electrolyzing device, a pressure stabilizing chamber, a direct-current conversion control system and an expansion cavity, the invention discloses a flexible solar panel and a plasma electromagnetic jet generator. The system integrates hybrid power supply of a high-temperature proton exchange membrane fuel cell and a flexible solar panel, and is coupled with a tail gas collection electrolysis device to realize in-situ regeneration of an oxyhydrogen working medium; main thrust is generated through the plasma electromagnetic jet generator, multi-mode propulsion is formed in cooperation with the distributed electric propulsion unit, the bottlenecks of unstable combustion, high carbon emission, short endurance and the like in a rarefied air environment are broken through, and zero-carbon-emission, long-endurance and high-reliability operation of the near space aircraft is achieved.

A marine vessel maneuvering system includes a jet propulsion device to jet a water current out from a jetting port and obtain a propulsive force from a recoil of the jetted water current, a handle to change a direction of the jetting port, a reverse bucket to open and close the jetting port, and a controller configured or programmed to change the direction of the jetting port in accordance with a rotation angle of the handle. In a state in which the reverse bucket covers at least a portion of the jetting port and when the rotation angle of the handle exceeds a first threshold, the controller is configured or programmed to execute a turning assist control to reduce an amount by which the reverse bucket covers the jetting port.