333 results about "Marine propulsion" patented technology

The invention discloses a ship propulsion control system and method, and relates to the technical field of ship engineering.The ship propulsion control system comprises an acquisition module used for acquiring analog quantity signals during ship propulsion, and a main controller module used for receiving the analog quantity signals and generating a propulsion control instruction; according to the ship propulsion control system, two acquisition channels are arranged for analog quantity signals, a fault channel is rapidly detected and switched in combination with a self-checking mechanism, the fault channel can be rapidly detected, the fault channel can be rapidly switched, the fault channel can be rapidly detected, the fault channel can be rapidly switched, and the reliability of the ship propulsion control system can be improved. A digital quantity output channel fault is found in time and switched to a standby channel, a power supply and communication interface backup strategy is perfected, fault priorities are accurately divided, corresponding measures are taken, the strict requirements of modern ships for high reliability and high safety of propulsion control are met, and powerful technical support is provided for stable navigation of the ships.

The invention discloses a ship shafting reliability evaluation method and system based on multiple working conditions, and the method comprises the steps: collecting multi-source data of a ship propulsion system through integrating multiple sensors; constructing a dynamic load spectrum based on a time-varying Copula function in combination with parameters such as a stress distribution function and a degradation amount distribution function; a reduced basis finite element method is adopted, experimental strain data are collected, and a reduced-order basis matrix is constructed; based on a three-stage Wiener degradation model, in combination with parameters such as a material degradation rate, activation energy and a temperature average value, the residual life of the ship propulsion system is predicted, and model parameters are adjusted in real time through a Bayesian dynamic updating mechanism; building Hamiltonian through physical constraint reinforcement learning, and optimizing operation parameters of the ship propulsion system in combination with a fault probability threshold value and an energy change rate threshold value; a digital twin engine is utilized to provide real-time visual output. According to the invention, the service life is prolonged to the greatest extent while the system meets the performance requirements; and monitoring and decision making by operators are facilitated.

The invention relates to the technical field of ship power system control, in particular to a ship shaft power generation energy management and efficiency optimization method based on multi-working-condition adaptation, and the method comprises the steps: a data collection and processing step: collecting and preprocessing multi-source heterogeneous operation parameters capable of comprehensively representing a ship propulsion system, a power system, a motion state and an external environment in real time; a working condition dynamic identification step; an optimization model dynamic construction step; an online optimization and control step; and an adaptive learning step: based on new data generated in a system operation process, performing periodic incremental training on the time sequence deep learning model to update network parameters of the time sequence deep learning model. The self-adaptive learning enables the system to continuously optimize the working condition identification precision along with the time lapse of ship operation and the change of the external environment, and improves the long-term stability and adaptability of the system.

The invention provides an energy management strategy verification platform for a plug-in series hybrid power ship propulsion system. The energy management strategy verification platform comprises a power source module, a power output module, a load simulation module, a transmission module, a sensor measurement module and a control system module, the power source module outputs electric energy through multi-energy cooperation; the power output module generates propelling power according to the electric energy; the load simulation module simulates load characteristics according to the propulsion power; the transmission module is connected with the power source module and the power output module as well as the power output module and the load simulation module; the sensor measurement module collects operation parameters of the verification platform; and the control system module executes an energy management strategy according to the operation parameters and outputs a control instruction. A graphical programming environment is constructed by adopting a modeling code automatic generation system, and a strategy rapid prototype development verification closed loop is formed in combination with a range extender intelligent start-stop control strategy and a multi-mode power generation control strategy.

The invention provides a time domain and frequency domain combined impact resistance analysis method and device for a ship stern tube, and the method comprises the steps: building geometric models of all parts in the stern tube through three-dimensional modeling software according to an actual engineering drawing of the stern tube, carrying out virtual assembly on the geometric model of each component according to the actual assembly relation of each component to obtain a geometric model of the tail shaft tube; importing the geometric model of the tail shaft tube into finite element software, endowing each component with material attributes, and carrying out grid division on the geometric model by adopting an overall network size control method; and performing static analysis on the geometric model after grid division to obtain static working stress, performing dynamic analysis on the geometric model after grid division to obtain dynamic impact stress, and synthesizing the static working stress and the dynamic impact stress into total stress. According to the method, time domain and frequency domain combined shock resistance response calculation is carried out for the tail shaft tube as a core component of the ship propulsion system, and the accuracy of shock resistance response calculation is improved.

The invention discloses a six-phase motor driver harmonic current suppression method based on multi-subspace control, and belongs to the technical field of motor control. In order to solve the problem that low-order harmonic current of a six-phase motor in a z1-z2 subspace is difficult to effectively suppress, the invention provides a scheme that a mathematical model of the six-phase permanent magnet synchronous motor is established, multi-subspace decomposition is carried out, and stator current is divided into a d-q subspace and the z1-z2 subspace; a double-closed-loop control architecture with a speed loop as an outer loop and a current loop as an inner loop is constructed, a d-q subspace adopts a PID regulator to realize fundamental current control, and z1-z2 subspaces realize suppression of fifth and seventh harmonic currents through a parallel structure of PI and a quasi-proportional resonance controller; and a PWM signal is synthesized through inverse transformation and dual three-phase space vector pulse width modulation, and an inverter is driven to realize stable output of fundamental wave energy and harmonic suppression. The method effectively reduces the harmonic distortion rate, improves the operation efficiency and stability, and is suitable for occasions of new energy vehicles, ship propulsion, rail transit and the like.

The invention provides a self-cooling electromagnetic direct-driven straight wing propeller, and relates to the technical field of ship propellers, the propeller comprises a shell, and an outer disc type motor, an inner disc type motor and a propelling mechanism which are arranged in the shell; the outer disc type motor comprises an outer rotor and an outer stator, the outer rotor is rotatably connected with the shell, and the outer stator is fixed to the shell. The inner disc type motor is coaxially arranged on the inner side of the outer disc type motor and comprises an inner rotor and an inner stator, the inner stator is fixed to the shell, and the inner rotor is rotatably connected with the outer rotor. The propelling mechanism comprises a disc, straight wing blades, a sun gear and a planetary gear, the disc is fixed to the outer rotor, the blades are evenly distributed in the circumferential direction, and a rotating shaft is rotatably installed on the disc. The sun gear is coaxially fixed with the inner rotor, the planetary gears are uniformly distributed, meshed with the sun gear and rotatably connected with the outer rotor, and each planetary gear is fixed with the corresponding blade rotating shaft. According to the propeller, the blades are driven to revolve and swing through the two motors respectively, a traditional complex structure is simplified, the size and weight are reduced, and the energy conversion efficiency is improved.

The application discloses a kind of ship's multiple propeller collaborative propulsion control method and system, it is related to ship automation control technical field.For by the control system of ship collaborative control multiple propeller to carry out ship propulsion, collaborative propulsion control method includes: obtaining the speed of ship, main station handle position and power station available power;Based on speed and main station handle position, identify the current navigation condition of ship;Based on the matching relationship of pre-set, obtain the operation mode matched with navigation condition;Based on navigation condition, operation mode and the switching control strategy between different navigation conditions of pre-set, available power of power station is distributed to multiple propeller, and the collaborative propulsion of ship is carried out.Such, by based on speed and main station handle position, identify navigation condition, and match operation mode, to distribute available power of power station to multiple propeller, improve the response speed of ship propulsion control, improve the adaptability to complex navigation environment, improve ship safety.

The invention discloses a liquid hydrogen high-temperature superconducting motor and magnetofluid dual-power propulsion system, and aims to solve the problems that an existing ship propulsion system is single in power mode and insufficient in power density. The system comprises a liquid hydrogen storage and supply unit, a cooling unit, an energy conversion unit, a superconducting motor propulsion unit and a magnetofluid propulsion unit, the liquid hydrogen storage and supply unit conveys liquid hydrogen to the superconducting part through the cooling loop, the liquid hydrogen is converted into hydrogen through the heat exchanger after being cooled, the energy conversion unit converts the hydrogen into electric energy and outputs the electric energy in a matched mode, and the superconducting motor propulsion unit and the magnetic fluid propulsion unit generate mechanical energy or electromagnetic force through the electric energy to drive a ship. And the superconducting component is cooled by the cooling loop. The liquid hydrogen in the system has the dual functions of a cooling medium and fuel, a coolant and fuel do not need to be additionally configured, the requirements for silence, high thrust and rapid maneuvering are met, the power density is high, the environmental protection property is good, and the system is suitable for high-performance propelling scenes such as ships, especially submarines.

A watercraft operating system includes a plurality of marine propulsion devices, a joystick, a thrust selector, and a controller. The thrust selector is operable to select one of a plurality of thrust modes including a limiting mode, which limits a forward thrust and a rearward thrust, and a non-limiting mode which does not limit at least one of the forward thrust and the rearward thrust. The forward thrust is generated by each of the plurality of marine propulsion devices when the joystick is tilted forward, whereas the rearward thrust is generated when the joystick is tilted rearward. The controller is configured or programmed to control a rudder angle and an output of each of the plurality of marine propulsion devices in accordance with the selected thrust mode, a tilt direction of the joystick, and a tilt amount of the joystick.

The present invention relates to a ship propulsion system wherein, when a change in the output of a main engine occurs or is expected, a controller variably controls the power withdrawal force of a shaft generator in a direction in which the change in the output of the main engine is counterbalanced, thereby maintaining the output of the main engine to be smooth, and the main engine's fuel efficiency and power supply stability engine can thus be improved.

The invention discloses an intelligent energy-saving control method and system for a ship propulsion system. The method comprises the steps that S1, operation parameters of the ship propulsion system, ship navigation state parameters and marine environment parameters are collected; s2, preprocessing each parameter, and constructing a multi-dimensional state feature set; s3, evaluating the operation efficiency of the propulsion system based on the gradient lifting-neural network composite model, and determining an energy-saving optimization space; s4, generating an optimization instruction of the key control parameters of the propulsion system through a self-adaptive fuzzy PID algorithm in combination with the dynamic change of the sea condition and the load; s5, executing the optimization instruction, collecting response parameters of the propulsion system in real time, and dynamically correcting control parameters according to deviation to form a closed-loop control cycle; and S6, periodically updating adjustable parameters of the evaluation model and the adaptive fuzzy PID algorithm. According to the invention, through multi-parameter fusion perception and dynamic optimization control, accurate matching of the propulsion system, the navigation environment and the load demand is realized, and the economical efficiency and the environmental protection property of ship navigation are improved.

The invention relates to the technical field of propulsion motor noise control, in particular to a propulsion motor noise control method based on short-time Fourier transform, and the method comprises the following steps: S1, collecting a vibration signal during the operation of a ship propulsion motor through a sensor, and obtaining a signal sequence; s2, converting the signal sequence into a time-frequency two-dimensional signal sequence by adopting short-time Fourier transform; and S3, obtaining an output signal by processing the time-frequency two-dimensional signal sequence. The propulsion motor noise control method based on short-time Fourier transform can continuously monitor the noise level of the motor during the operation period through combining the advantages of the sum, and quickly adjust the control strategy according to real-time feedback, thereby achieving the purpose of automatically regulating and controlling the noise, effectively reducing the operation noise of the motor, facilitating the reduction of the structural fatigue, and improving the reliability of the propulsion motor. The service life of equipment is prolonged, so that the long-term maintenance cost is reduced.

The application relates to the technical field of cabin sealing of a ship propulsion system, and provides a ship cabin sealing device and a ship, which comprises a sealing flange, a linear driving mechanism and a flange seat; the sealing flange is movably sleeved on a transmission main shaft of the ship, and the axis of the sealing flange is coincident with the axis of the transmission main shaft; one side of a sealing boss of the sealing flange facing the transmission main shaft is provided with a sealing surface, the sealing surface is used for being detachably connected with the end surface of the sealing boss; the sealing flange is connected with the moving end of the linear driving mechanism, the fixed end of the linear driving mechanism is connected with the flange seat, and the flange seat is used for being connected with the cabin wall fence of the ship; wherein the sealing flange has a first position and a second position; when the sealing surface is separated from the end surface of the sealing boss at the first position; and when the sealing surface is attached to the end surface of the sealing boss at the second position; the application conveniently realizes the sealing of the cabin, and improves the safety of the ship.

This invention relates to the field of marine propulsion device manufacturing, specifically a design method for a fully azimuth-controlled adjustable-pitch ducted propeller. This method extracts the basic parameters of the ship's main engine and existing rudder propeller, and establishes an integrated arrangement scheme to replace the fixed-pitch propeller with an adjustable-pitch propeller while maintaining the original power parameters unchanged. Based on the theoretical diagram of the fixed-pitch ducted propeller, a hydrodynamic calculation program is executed, introducing correction factors for increased shell diameter ratio and slightly reduced disk area ratio, and forcibly lowering the theoretical thrust coefficient by 5%, to obtain the corrected target open-water characteristic curve. The overall rotational characteristics of the fully azimuth-controlled rudder propeller are utilized to provide thrust for reversing and steering, strictly limiting the pitch adjustment authority to adaptability requirements for low-speed navigation and providing maximum drag under multiple operating conditions. A single-crank slider mechanism is configured inside the propeller hub as the core rotor component, and a three-dimensional spatial layout is completed. An electro-hydraulic integrated servo control system, dominated by a PLC and incorporating a dual-pump parallel architecture and a built-in hydraulic lock, is established. This significantly reduces the frequency and physical amplitude of the propeller blade rotation angle.

The invention discloses an analysis and prediction method for high-frequency noise of a pod propeller, and the method comprises the following steps: S1, obtaining flow field original data and corresponding high-frequency noise monitoring data of the pod propeller in a working state, and carrying out the preprocessing; and S2, constructing a flow field-noise coupling analysis framework based on the separation vortex model, and setting a time step length and a calculation frequency matched with actual working conditions. The invention relates to the technical field of ship propeller noise analysis and prediction. According to the pod propulsor high-frequency noise analysis and prediction method, flow field vortex structure characteristics can be captured by constructing a flow field-noise coupling analysis framework and processing the preprocessed flow field data, and the contribution degree of each vortex unit to the high-frequency noise is accurately calculated based on a vortex structure and noise generation correlation mechanism, so that the high-frequency noise analysis and prediction method is provided for the high-frequency noise analysis and prediction of the pod propulsor. The vortex units leading the noise source are screened, dynamic positioning of the high-frequency noise source is achieved by combining the space-time position information of the vortex units, and the source of noise generation can be deeply known.

The invention discloses a vibration suppression and energy efficiency improvement method for a marine propulsion system, and belongs to the technical field of ship vibration control and energy efficiency optimizing.The method comprises the steps that vibration signals at a middle bearing, a propeller hub and a main engine base are collected, and three paths of filtering signals are obtained through band-pass filtering; front and rear flow velocity signals and main shaft rotating speed signals of a propeller are collected, and the ratio of the flow velocity difference to the rotating speed difference is calculated to obtain an energy efficiency coefficient; the three paths of filtering signals are multiplied by the energy efficiency coefficient to generate three paths of control signals, and the three paths of control signals are output to the three piezoelectric actuators to generate displacement amounts which act on a bearing shell, the inner wall of a propeller hub and a main engine base; when the propulsion shafting vibrates longitudinally, the metal push rod drives the coil to reciprocate between the permanent magnets to generate induced current, the induced current is stored in the storage battery after being rectified and supplied to the hydraulic controller to adjust the oil flow of the hydraulic cylinder according to a control signal, and graded suppression of multi-source vibration and recycling of vibration energy are achieved. And the vibration suppression effect and the energy efficiency level of the system are obviously improved.

The application discloses an NH3-carbon-hydrogen fuel blending flame soot generation model and a prediction method based on a nitridation mechanism, and belongs to the technical field of combustion pollution control and numerical simulation. The application constructs a surface nitridation reaction population balance model containing NH3, NH2 and HCN double reaction paths on the basis of a traditional HACA soot model, determines reaction rate constants through molecular dynamics and quantum chemistry calculation, and clearly defines the core hypothesis that inertization of nitrogen-containing functional groups permanently blocks HACA growth. The model is solved by using a shadow projection method and is coupled with an OPPDIF flame solver to realize accurate prediction of soot generation in an ammonia-doped flame. The application can accurately distinguish between chemical soot suppression and dilution effect of ammonia, significantly improves the prediction accuracy of soot volume fraction and particle size, reveals the double-phase soot suppression mechanism of the gas phase surface, and is suitable for soot emission prediction and low-emission design of ammonia-doped combustion equipment such as gas turbines, internal combustion engines and ship propulsion.

The application discloses a kind of full-rotation ship decomposed type alternate optimization thrust distribution method, belongs to ship propeller control technical field.This method will full-rotation ship thrust distribution problem be divided into thrust amplitude and azimuth alternate optimization sub-problems, by constructing the augmented Lagrangian function with box constraint, in combination with gradient descent and backtracking line search strategy, give the explicit solution of optimal thrust and azimuth, realize propeller thrust and azimuth collaborative optimization.This method can unify the processing singularity of geometric matrix, thrust and azimuth size, change rate, energy consumption, accuracy and other constraint requirements, with low computational complexity, high efficiency, strong real-time and numerical stability, avoid the mutation phenomenon of traditional algorithm under boundary constraint, suitable for the high-frequency control demand of intelligent tugboat and other full-rotation propelling ships, with good engineering adaptability and popularization value.

Provided herein is a marine propulsion device including a prime mover having a drive shaft, a cowling surrounding the prime mover, and first and second struts secured to the cowling, each of the struts having a forward portion, an internal belt space, and an aft portion. The marine propulsion device further includes a lower unit coupled to a distal end of the strut, a sprocket rotatably disposed within the lower unit, a shaft rotatably coupled to the sprocket, and a belt rotatably connecting the drive shaft to the sprocket, whereby a first portion of the belt is disposed within the internal belt space of the first strut and a second portion of the belt is disposed within the internal belt space of the second strut. The marine propulsion device further includes a thermal circuit (with a heat transfer fluid) extending from the cowling through each strut and into the lower unit.

This invention relates to the field of marine propulsion technology, specifically to an auxiliary propulsion structure for electric ships. The structure includes a ship hull, a propeller mounted on the bottom of the hull, and rotating rods fixedly connected to both sides of the hull. An auxiliary propeller is mounted on each rotating rod. Through an idling cooling mechanism, when the water inlet is above the water surface, causing the drive rod to drive the auxiliary propeller to idle, the idling cooling mechanism opens an emergency water path. This allows pre-stored cooling water from the tank to be precisely delivered via drip pipes to the junction of the drive rod and the bearing. This directional dripping forms a water film at the friction interface, providing immediate lubrication and drag reduction, as well as rapid heat absorption and cooling, preventing high-temperature wear, deformation, or sintering of components. Compared to traditional unprotected designs, this mechanism is fast-responding and highly targeted, minimizing damage to core components during idling and ensuring reliable operation of the auxiliary propeller in complex waters.

The invention relates to the technical field of damage detection, in particular to a ship controllable-pitch propeller cavitation damage detection method and device, and provides the following scheme that pressure, vibration and acoustic sensors are arranged on a propeller shaft and a propeller blade to collect multi-source signals, parameter mapping is carried out on the multi-source signals and a simulation result of a digital twinborn model, and the multi-source signals are obtained; after deviation distribution is obtained, a structure response corpus is generated; and inputting the corpus into a large language model, and identifying the type, the position and the evolution stage of the cavitation damage through semantic association and knowledge reasoning. According to the method, non-linear coupling feature extraction of the blade fluid structure is realized through micro-amplitude virtual pitch adjustment excitation, damage semantic recognition is realized in combination with language model reasoning, the precision and interpretability of cavitation damage detection are improved, and the method is suitable for ship propulsion system health monitoring under complex navigational speed and variable pitch working conditions.

The application belongs to the technical field of test measurement, and discloses a single-motor multi-propeller ship model self-propulsion test device and a shafting parallel module. The shafting parallel module comprises: a driving rotating device, combined driven rotating devices arranged on both sides of the driving rotating device; each group of the combined driven rotating devices comprises a first driven rotating device and a second driven rotating device, and the driving rotating device, the first driven rotating device and the second driven rotating device are connected through rotating connecting devices. Meanwhile, the single-motor multi-propeller ship model self-propulsion test device is designed based on the shafting parallel module, so that the shafting connection and transmission during the single-motor multi-propeller ship model self-propulsion test are realized. The shafting parallel module can quickly adapt to any propeller spacing within a certain range, reduces installation adjustment redundancy, has high transmission efficiency, and can be used to complete the ship model self-propulsion test and carry out research on ship propulsion efficiency and ship engine propeller matching.

A moveable sensor system for a marine vessel. A support member is configured to be coupled to the marine vessel, wherein the support member is configured to at least one of support a marine drive for propelling the marine vessel and to anchor the marine vessel. A sensor is moveably coupled to the support system so as to be positioned for collecting data within a region underwater. An actuator is coupled between the support member and the sensor, wherein the actuator is operable to move the sensor relative to the support member to thereby change the region in which the data is collected.

The utility model provides an optimally designed ship propulsion device, and relates to the technical field of ship propulsion. The optimally-designed ship propelling device comprises a protection frame, a fixing frame is fixedly connected to the interior of the protection frame, and a rotating hole is formed in one side of the fixing frame; and the rotating shaft is rotationally installed in the rotating hole, and one end of the rotating shaft is fixedly connected with a propeller. By arranging the protection frame, after a worker fixes the protection frame to the tail of a ship and fixedly connects one end of the rotating shaft with a ship transmission mechanism, the transmission mechanism can drive the propeller to rotate through the rotating shaft when rotating, so that the ship is propelled, and the positions of the adjusting frame and the control frame are adjusted; and the protective nets can block and protect the two ends of the protective frame, so that when the propeller works in an area with many aquatic plants, the aquatic plants are prevented from being wound outside the propeller, the rotating shaft can rotate normally, and the driving power of the ship is guaranteed.

This utility model relates to the field of propeller direction control technology, specifically a marine propeller direction control device, including a protective cover, a mounting plate, a rudder stock, and a rudder blade. The marine propeller direction control device has a cylindrical body, and the mounting plate and protective cover are installed inside the cylindrical body. A servo motor is mounted on the top of the mounting plate via a mounting base, and the output shaft of the servo motor is fitted with a driving helical gear. The rudder stock is fitted on one end of the mounting plate via a bearing, and the top of the rudder stock is fitted with a driven helical gear. A positioning bushing is installed at the bottom of the cylindrical body, fitted around the rudder stock, and connected to a flared opening welded to the bottom of the positioning bushing. An inner ring is provided on the top periphery of the sealed chassis, and the inner ring is located inside the flared opening and fits tightly. The marine propeller direction control device automatically controls the rudder blade to change direction, thereby controlling the ship's course, effectively limiting the rudder stock, making it rotate stably, and reducing sway.

To provide a power control unit 1 for a ship's propulsion system 100, comprising an internal combustion engine 4 and a shaft 2 having a shaft generator 5. [Solution] The power control unit 1 is configured to provide fuel commands to the internal combustion engine 4 based on the low-speed component of the shaft 2 speed error, i.e., the low-speed component of the deviation of the shaft speed from the speed setpoint. A generator power command is provided to the shaft generator 5 based on the high-speed component of the shaft 2 speed error and the state of the electrical grid of the electrical grid electrically connected to the shaft generator 5. An energy buffer 7 is used to store power from the shaft generator 5, release power to the shaft generator 5, and release power to the electrical grid 8. Thus, it becomes easier to achieve a more stable engine control system and avoid engine overload.

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.