12 results about "Pump-jet" patented technology

The utility model relates to a hybrid drive variable gliding wing underwater robot belongs to underwater robot field, including streamline shell, its appearance imitates seat head whale body shape design, surface smooth transition, cross section is oval, variable gliding wing mechanism, relative to the symmetrical surface of shell 1 symmetrical arrangement, including gliding wing, worm, worm wheel and steering wheel, the gliding wing is connected through the meshing of worm wheel and worm, and the worm is driven by the steering wheel, hybrid power system, including propeller and pump jet propeller, and the propeller includes two symmetrical side propellers and a stern propeller, the pump jet propeller is installed in the recess inside the bottom of shell, and the nozzle is rearward and is equipped with a fairing, buoyancy adjusting system, including high-pressure gas cylinder and air release valve, and the robot float center is adjusted through gas charging and discharging, the utility model realizes the efficient cooperation of gliding, propulsion and attitude control, and has good environmental adaptability and recyclability.

The present application relates to the technical field of water jet propeller, and discloses a fish environmental protection type water jet propeller based on bionics, which comprises a water inlet pipeline, a water jet assembly is arranged on the water inlet pipeline, and the water jet assembly comprises a main shaft. In order to meet the dual requirements of ship propulsion and water ecological protection, the fish environmental protection type water jet propeller based on bionics is provided with the water jet assembly, the assembly drives the mounting shaft to rotate together with the main shaft, the spherical block and the conical block cooperatively drive the impeller and the propeller to run at high speed, and stable propelling water flow is formed; the straight groove, the connecting groove, the hollow drainage groove and the conical drainage groove of the drainage module constitute a closed loop flow channel, the high-energy water flow downstream of the nozzle is guided back to the inlet edge of the impeller and the propeller through the straight metal pipe and the drainage curved metal pipe, uniform backflow jet flow is formed on the surface of the blade, the bionic vortex screen is generated by the interference of the main flow, the rigid edge of the blade is covered, and small fish are guided to actively avoid.

The utility model belongs to life-saving equipment technical field, specifically disclose a kind of modularization pump spray propeller and lifesaving equipment.The utility model's modularization pump spray propeller, impeller of propeller operates in the uniform flow field in fairing, can effectively utilize inflow ram, so that it can better improve anti-cavitation performance at high speed, reach higher propelling efficiency, and not susceptible to water flow condition and sailing speed influence;The motor speed of propeller is changed by electronic speed regulator, to change the water velocity of fairing water outlet jet, and then the propelling force of propeller can be quickly changed;The motor speed of lifesaving equipment two sides propeller is changed by electronic speed regulator, to change the water velocity of two sides fairing water outlet jet and produce speed difference, that is, the quick steering of lifesaving equipment can be realized;Even if lifesaving equipment overturns, because the upper end and lower end of lifesaving equipment stern are all provided with propeller, the normal propelling use of lifesaving equipment is not affected.

This invention belongs to the field of propulsion control technology, specifically relating to an amphibious vehicle and a hybrid propulsion method and system. It employs a composite propulsion configuration consisting of a main water jet propulsion unit and dual-sided electric propulsion units on both sides of the vehicle body. A drive unit provides power to the water jet propulsion unit, while a power battery provides operating power to the electric propulsion units. The water jet propulsion unit is only equipped with steering nozzles, eliminating the need for mechanical reversing devices such as a mechanical backboard. This decouples forward and reverse functions, with the reversing function entirely handled by the dual-sided electric propulsion units, each capable of independently generating forward or backward thrust. This short-duration, high-thrust electric propulsion method replaces the original mechanical reversing technology, resulting in high propulsion efficiency and a small size. It solves the key defects of traditional mechanical reversing structures, such as large space occupation and low efficiency, effectively preventing water flow from impacting the vehicle body during reversing and also increasing auxiliary propulsion capabilities.

This invention relates to a design method for the assembly layout of a stern section and a waterjet propulsion system for a surface vessel. The method comprises: S1, studying the characteristics of the stern section of the surface vessel and considering the assembly layout with the waterjet propulsion system, making adaptive improvements to the stern section's lifting point and cross-sectional characteristics; S2, designing a guide channel in front of the duct, with design factors including the starting position, width, and depth of the guide channel; S3, combining the propulsion system's embedded connection form and shafting layout, comprehensively considering the effects of resistance and wake field, selecting the optimal appendage scheme for the stern layout. This invention comprehensively considers propulsion strength, vibration, and flow field aspects, forming a stern structure where the duct and stern are integrated. A guide channel area is adaptively designed in front of the propulsion duct's flow field. For the shafting layout of the embedded waterjet propulsion system, a stern shaft frame scheme selection and design are carried out, resulting in a stern modification scheme, assembly scheme, and appendage scheme for the main hull with lower resistance and more uniform wake.

The utility model relates to the field of aircraft technology, concretely relates to a vertical take-off and landing multipurpose ground effect aircraft, including fuselage, one pair of left and right symmetrical wings is fixedly connected to the both sides of fuselage, two cantilever mounting rods are fixed to each side wing, rotatable rotor arm is connected on cantilever mounting rod, and tilt duct type propeller is installed on rotor arm, rotor arm penetrates tilt duct type propeller, the inside of each cantilever mounting rod is provided with steering wheel, and steering wheel output shaft is coaxial with corresponding rotor arm, two underwater pump jet propellers are symmetrically arranged in the area below the waterline of fuselage lower part, and tail propeller is installed to the tail of fuselage, wherein, cantilever mounting rod is hollow structure, and the inside is equipped with the wiring channel that communicates steering wheel and flight control, and rotor arm rotates 0 under the drive of steering wheel °-180 relative to steering wheel shaft.

This invention discloses a biomimetic robot and system for deep-sea mining. The biomimetic robot includes: a biomimetic shell, a docking and gripping mechanism, a control unit, an energy module, a buoyancy adjustment mechanism, and a power unit. The energy module is located in the body and supplies power to the control unit, docking and gripping mechanism, buoyancy adjustment mechanism, and power unit. The control unit is located in the body and is responsible for receiving feedback from the docking and gripping mechanism and issuing control commands. The buoyancy adjustment mechanism includes a pressure-resistant buoyancy adjustment chamber on the outside of the body, which can adjust the water volume inside the chamber according to control signals to achieve buoyancy adjustment. The power unit consists of biomimetic wave-shaped fins symmetrically arranged on both sides of the body and a water jet propulsion unit built into the body with its outlet located at the tail, providing propulsion for the device. The docking and gripping mechanism is installed on the outer wall of the body and can grip the mineral load chamber according to control commands and report the gripping status to the control unit.

The application provides a water jet propulsion pump noise optimization method and system based on three-dimensional counter design, which comprises an impeller, a runner chamber, a guide vane body, a meridian plane flow channel control line is fitted by using a fourth-order cubic Bezier curve, a blade section load distribution adopts a three-section control law, a corresponding relationship between meridian plane fitting curve control point coordinates, blade section load distribution control parameters, stacking angles and water jet propulsion pump head, efficiency and noise is established by using a response surface, optimization is carried out by using a multi-objective genetic algorithm, corresponding control parameter values of the lowest noise meeting target head and efficiency requirements are obtained, and high-performance and low-noise design of the water jet propulsion pump is realized. The application takes into account the multi-aspect requirements of water jet propulsion pump performance and noise, the design method is also applicable to pump jet design, and after popularization, can be widely applied to the design of water jet propulsion systems.

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.

The application provides a piston type low-noise underwater robot vector water jet propeller, which comprises a water jet propeller body, the water jet propeller body comprises a propeller shell, a plurality of electrically-controlled reversible check valves, an electrically-controlled piston, a piston electric push rod, an electric motor, a front end cover, a rear end cover, a motor mounting rack and a propeller body mounting rack. The application is characterized in that four electrically-controlled reversible check valves are mounted on the electrically-controlled piston, the front end cover and the rear end cover respectively, and the electrically-controlled reversible check valves are arranged in the axial horizontal direction and controlled by a controller, so that the direction of water flow ejection can be switched, and the switching of the propeller thrust output direction can be realized. Compared with the propeller, the piston type water jet propeller provided by the application has lower underwater noise, and can make the submersible have smaller navigation noise, so that the submersible can be more conducive to covert navigation and is not easy to be discovered by a sonar. Compared with the propeller, the piston type water jet propeller provided by the application has no rotating structure such as a propeller, so that the piston type water jet propeller is not easy to be entangled by a fishing net rope and the like during underwater navigation, and therefore, the piston type water jet propeller has higher reliability and adaptability compared with the propeller.

This invention belongs to the field of large-span bridge vibration excitation technology, and discloses a low-frequency, large-amplitude vibration excitation device for long-span bridges. This invention generates periodic vertical forces by controlling the direction and timing of water pump jets, providing a controllable vertical load to the bridge, thereby exciting large-amplitude vertical or torsional vibrations. By designing the water tank capacity, number of water pumps, nozzle diameter, and jet velocity, and employing a multi-nozzle parallel connection and phase control strategy, the jet force and water flow return force are optimized, significantly reducing system power, installation difficulty, and cost while achieving efficient excitation. Compared with existing technologies, this invention's low-frequency, large-amplitude vibration excitation device for long-span bridges does not require complex mechanical frequency tuning and actuators, is small in size, easy to assemble and disassemble, and has a flexible and adjustable control system that can quickly adapt to different vibration modes and frequency conditions of the bridge, demonstrating significant engineering application prospects and promotional value.

An axial flow water jet thruster and a use method therefor. The axial flow water jet thruster comprises a pump housing (1), a guide vane (2), a pump shaft (3), an impeller (4), and an adjustment assembly (5). The guide vane (2) is fixedly disposed in the pump housing (1). The pump shaft (3) can rotate around its own axis, and one end of the pump shaft (3) extends into the pump housing (1). The impeller (4) is disposed in the pump housing (1); one end of the pump shaft (3) movably passes through the guide vane (2), and has a transmission connection with the impeller (4); and the pump shaft (3) can drive the impeller (4) to rotate. The adjustment assembly (5) is disposed in the pump housing (1), and the adjustment assembly (5) is connected to the impeller (4) and can drive the impeller (4) to move toward or away from the guide vane (2). The distance between the impeller (4) and the guide vane (2) can be promptly and conveniently adjusted, and the distance between the impeller (4) and the guide vane (2) can conform to the use environment without disassembling the axial flow water jet thruster, thereby avoiding the generation of turbulence, reducing vibration and noise, and causing the axial flow water jet thruster to have better adaptability and higher working efficiency.