196 results about "Naval architecture" patented technology

The invention provides a marine equipment drawing recognition method and system based on a large model, and is applied to the field of intelligent analysis and knowledge management of ship engineering. The method comprises the following steps: receiving a marine equipment engineering drawing image, extracting global features through character and line detection after preprocessing so as to identify a drawing type, and combining symbol classification and topological graph construction to determine an equipment connection relationship, performing multi-source information reasoning on the target component by fusing a rule engine and a large language model, and outputting a high-confidence identification result; according to the scheme, the accuracy and the automation level of recognition of the equipment parts in the complex marine drawing can be remarkably improved, and the technical bottlenecks of a traditional method in the aspects of insufficient cross-modal information fusion, limited semantic understanding depth, poor heterogeneous drawing adaptability and the like are effectively solved.

The invention discloses a geotextile laying ship operation intelligent control method and system based on the Internet of ships, and belongs to the technical field of ship engineering, and the method comprises the following steps: S1, collecting geotextile laying ship operation real-time data based on the Internet of ships through employing the Internet of Things technology; s2, processing and analyzing the geotextile laying ship operation real-time data based on the Internet of ships, timely discovering potential safety hazards and problems, and determining a geotextile laying ship operation risk prediction result; and S3, according to the operation risk prediction result of the geotextile laying ship, intelligent real-time adjustment and control are performed on the ship, so that the ship is always kept in a safe range in the geotextile laying process. The problem that intelligent control over ship laying operation cannot be effectively achieved in the prior art is solved. The system can achieve the functions of real-time monitoring, remote control, automatic control and the like, can improve the safety and efficiency of a ship in the arrangement process, can reduce the risk of manual operation errors, improves the accuracy and safety of arrangement work, and reduces the operation cost.

The invention discloses a ship state monitoring system and method based on multi-source data, and relates to the technical field of ship engineering, the system comprises a bionic flexible sensing module, a multi-source data acquisition module, an anti-interference communication module, a multi-source data fusion module, an edge calculation processing module, an intelligent fault diagnosis module and a man-machine interaction and decision support module; wherein the bionic flexible sensing module acquires broadband vibration signals, the multi-source data acquisition module accesses multi-source data, the anti-interference communication module realizes data transmission based on a metamaterial antenna and the like, the multi-source data fusion module generates a standardized data set, and the edge calculation processing module completes feature extraction and abnormity pre-screening. The intelligent fault diagnosis module locates a fault and generates a report, and the man-machine interaction and decision support module visualizes data; the bottleneck of curved surface detection is broken through, data transmission is guaranteed, and accurate diagnosis is realized.

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 relates to the field of navigation technology and ship engineering, and discloses an automatic measuring and monitoring system for ship loading, which comprises a monitoring network construction module used for configuring a multi-mode sensor array of a ship and constructing a distributed intelligent monitoring network of the ship; the loading state data fusion module is used for collecting the multi-dimensional loading state data of the ship and then carrying out data fusion to generate fused loading state data; the loading state analysis module is used for mapping the fused loading state data to a parameterized three-dimensional model so as to calculate the stability parameter, the shearing force bending moment distribution and the cabin breaking stability margin of the ship under the current loading working condition, and the loading state of the ship is determined; the risk early warning module is used for analyzing the loading state change of the ship in the subsequent loading process so as to determine a risk early warning mechanism and a loading parameter optimization scheme of the ship; and the intelligent monitoring execution module is used for executing automatic measurement and monitoring of loading of the ship. According to the invention, the real-time performance and accuracy of ship loading monitoring can be improved.

The invention belongs to the technical field of ship engineering and information, and particularly relates to a BOM data integrated storage and management method applied to ship overall design software, which comprises the following steps: defining a metadata model of BOM data in the ship overall design software, including part types, attributes, relationships and constraint information; the management process of the BOM data is simplified through a unified data storage library and standardized processing, and the working efficiency of a design team is improved. And the data error rate is reduced: through data deduplication and redundancy processing, the possibility of data errors is reduced, and the design accuracy is improved. And through data integration and establishment of an association relationship, data exchange and sharing among different majors are promoted, and collaborative design of multiple majors is facilitated. Through data standardization and naming specification, the query and manageability of the BOM data are improved, and a design team can conveniently search and use the data.

The invention provides a marine fuel leakage control method and system, and belongs to the technical field of ship engineering.The method comprises the steps that multi-physics field data are collected, and the multi-physics field data comprise marine fuel concentration data, temperature data and pressure data; performing feature extraction on the marine fuel concentration data, the temperature data and the pressure data to obtain marine fuel leakage feature parameters; the marine fuel leakage characteristic parameters are input into a marine fuel leakage early warning model for prediction, and the marine fuel leakage probability and the marine fuel leakage position are obtained; and generating a marine fuel leakage control instruction based on the marine fuel leakage probability and / or the marine fuel leakage position. According to the method, the leakage probability and position of the marine fuel are accurately predicted, and the safety of ships and personnel is guaranteed.

The invention belongs to the technical field of ship engineering, and discloses a marine lifeboat side-leaning releasing device which comprises a main body, a winch is arranged on the surface of the main body, a supporting rod is rotationally connected to the interior of the main body, and a steel cable located at one end of the supporting rod is wound on the surface of the winch. According to the device, plugging of the liquid outlet pipe can be cancelled through the plugging block, then lubricating oil in the oil storage tank can enter the liquid outlet pipe, the liquid outlet pipe can lubricate the connecting position of the first connecting rod and the lifting hook and the connecting position of the handle and the shell, and finally plugging of the liquid outlet pipe by the plugging block is cancelled through the driving assembly; and furthermore, the connecting parts of the connecting rod I and the lifting hook as well as the handle and the shell can be lubricated, so that the frictional resistance at the connecting parts of the connecting rod I and the lifting hook as well as the handle and the shell is reduced, the connecting rod I and the lifting hook as well as the handle and the shell are operated more flexibly and smoothly, and the overall safety of the lifeboat releasing device is improved.

The invention belongs to the technical field of ship engineering CAD (computer-aided design) three-dimensional modeling, and particularly relates to a ship molded line parameterization modeling method, a storage medium and a ship molded line parameterization modeling system.The ship molded line parameterization modeling method comprises the steps that point models in three-dimensional modeling are classified and differentially expressed; classifying the line model of the hull molded line, and controlling the geometrical shape of the line model through parameters; based on classification of the point model and the line model, a relevance control mechanism is established, and a three-dimensional line frame is generated through interpolation, fairing and synchronous optimization of the molded line. Based on point and line categories and different parameter relevance, in the overall design stage, molded line three-dimensional modeling is carried out whether the molded line is designed preliminarily or under the condition of existing molded values, and the three-dimensional line frame is generated. The method has the advantages that the molded lines can be quickly created and optimized, the molded lines related to the points can be synchronously modified by modifying and fairing the points or the lines, and preconditions are provided for follow-up construction of the fairing hull molded surface by the molded lines.

The invention relates to the technical field of ship engineering, and provides a multi-mode fuel switching system and method.The multi-mode fuel switching system comprises a working condition monitoring module, an intelligent decision module and a fuel supply control module, and the current working condition parameters of the trailing suction dredger are obtained in real time; the current working condition of the dredger is determined according to the current working condition parameters, and fuel is supplied to the engine from a preset fuel supply mode library supply mode according to the fuel supply mode; and after the fuel supply mode is switched, the intelligent decision-making module continues to monitor the change condition of the working condition parameters in real time, and relevant parameters in the fuel supply mode are adjusted according to the preset fuel supply mode. By ensuring that optimal fuel supply can be obtained in different working states, performance reduction and abrasion of the engine caused by improper fuel supply are avoided, and the service life of the engine is prolonged; a natural gas single fuel mode is used in a proper working state, pollutant emission is reduced, and pollution to the marine environment is reduced.

The invention relates to the technical field of ship engineering, and discloses a ship bottom plate quick replacement structure which comprises a ship bottom plate, four inverted hanging type electric hoists, a first supporting frame and a second supporting frame, the ship bottom plate comprises a K-row plate, a ship board outer plate and a straight plate, and a plurality of rib plate bulk structures and the ship board outer plate form a first construction area; a second construction area is formed at the position of the K-row plate, and a third construction area is formed at the position of the straight plate. The bulk structure of the ship side outer plate and related rib plates is divided into a first construction area, a K-row plate area serves as a second construction area, the straight plate end close to the K-row plate serves as a third construction area, a ship bottom plate is divided into three construction areas, and bulk construction is carried out on the complex area of the ship side outer plate in advance; buffering is provided for workshop production preparation, timely feeding and work starting are ensured, synchronous construction can be conducted on a ship site and a production workshop inner site, the construction efficiency is improved, and a guarantee is provided for early undocking of a ship.

The invention discloses a drum-shaped rubber fender device with a groove structure drainage function, and belongs to the technical field of ship engineering, the drum-shaped rubber fender device comprises a rubber fender main body and an anti-scour mechanism which are mounted on a wharf, and the two ends of the rubber fender main body are fixedly connected with the wharf and the anti-scour mechanism through first fastening assemblies with waterproof functions respectively; the rubber fender comprises a rubber fender body, the rubber fender body is arranged in a drum shape, an anti-collision mechanism for enhancing the buffering effect on the rubber fender body is arranged in the rubber fender body, an inclined zipper and a horizontal zipper are installed at the symmetrical positions between the anti-collision mechanism and a wharf, and the drum-shaped rubber fender body absorbs collision energy through elastic deformation. The anti-collision mechanism enhances internal buffering, the inclined zippers bear the gravity and impact force of the anti-collision mechanism, the horizontal zippers restrain the position of the fender, the overall structural stability of the rubber fender device is embodied, dispersion and absorption of collision energy are achieved in combination with multiple heavy assemblies, and local stress is reduced.

The invention provides a navigation simulation test method and system, and is applied to the technical field of ship engineering, and the method comprises the steps: obtaining the state data of a ship, a target ship state list, and the number of target scenes, respectively extracting list data from a target ship distance list, a target ship speed list and a target ship course list in the target ship state list, and combining the list data as a target ship state; according to the state of the ship and the state of the target ship, the position of an actual collision point of the ship and the target ship is obtained; under the condition that the position of the actual collision point meets a specific condition, adding the state data of the ship and the state data of the target ship as a group of scene data into a simulation test list; converting the simulation test list into a simulation test file under the condition of traversing possible combinations of all target ship state data; based on the simulation test file and the target scene number, a ship navigation simulation test is carried out, a simulation test result is generated, the simulation test efficiency can be improved, and the test result is more objective and comprehensive.

The invention belongs to the field of ship engineering design, and discloses a ship cabin layout method and system based on three-dimensional knowledge gene layer dynamic fusion. The system comprises a cabin layout reasoning module based on priori knowledge, an intelligent cabin layout optimization algorithm module based on computational knowledge, a human intelligence knowledge cabin layout scheme online design module and a three-dimensional knowledge fusion solving cabin layout design module. Three-dimensional knowledge individuals of the priori knowledge scheme, the algorithm knowledge scheme and the human intelligence knowledge scheme which are obtained respectively are dynamically fused on the evolution algorithm gene level to form an evolution group, and a cabin layout scheme is obtained through operation in a replacement mode, a crossing mode and a mode of combining crossing and a multi-objective function tradeoff method; according to the method, an optimization target and constraint conditions which are difficult to be expressed by mathematical languages in the cabin layout process can be considered in the algorithm solving process, and a more practical ship cabin layout scheme is obtained.

The invention discloses a ship stability protection device, and relates to the technical field of ship engineering, the ship stability protection device comprises a ship main body, containing grooves are formed in the two sides of the ship main body, and main stabilization assemblies are arranged in the containing grooves; the main anti-rolling assembly comprises a main anti-rolling fin used for enhancing the stability of the ship body and a main fin driving mechanism used for driving the main anti-rolling fin to unfold or contract, a storage groove is formed in the bottom of the ship body, and an auxiliary anti-rolling assembly is arranged in the storage groove; the auxiliary stabilization assembly comprises an auxiliary stabilization fin used for being matched with the main stabilization fin to improve the stabilization effect and an auxiliary fin driving mechanism used for driving the auxiliary stabilization fin to unfold or contract, by starting the rotation driving component, the rotation driving component drives the rotation block to rotate by 90 degrees around the rotation column, the fixing frame is made to rotate out of the containing groove, and the auxiliary fin driving mechanism drives the auxiliary stabilization fin to unfold or contract. The extension length of the main fin stabilizer is changed by the linear driving part, so that the length-width ratio of the ship main body is changed, and the stabilization effect of the ship main body is improved.

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 invention discloses a combined marine heat exchanger, and belongs to the technical field of ship engineering, the combined marine heat exchanger comprises two heat exchanger shells, the number of the heat exchanger shells is two, and two fixing discs are fixedly mounted at the positions, close to the top and the bottom, between the inner walls of the heat exchanger shells correspondingly; a plurality of heat exchange tubes are fixedly mounted on the heat exchanger shell through a fixing disc; according to the heat exchanger, the piston rod slides up and down in the piston cylinder in a reciprocating mode to drive the spoiler at the top end of the piston rod to synchronously reciprocate along the outer wall of the heat exchange tube, the spoiler interacts with a shell pass medium in the moving process, and meanwhile the impeller at the top end is driven to synchronously rotate under the impact of the medium; the piston rod drives the spoiler to reciprocate and rotate and disturb the impeller, so that the flow disturbance intensity of a shell pass medium can be enhanced, the flow stability of the medium is broken, a medium retention area on the outer wall of the heat exchange tube is avoided, the heat transfer efficiency is improved, and the stability of the heat exchange performance of equipment is guaranteed.

The invention relates to the technical field of ship engineering, and discloses an anti-explosion pressure relief system for a ship cabin and a control method thereof.The cabin comprises a wall plate provided with a relief opening, and the anti-explosion pressure relief system comprises a sealing gasket annularly arranged on the portion, on the periphery of the relief opening, of the wall plate; the sealing plate abuts against the outer side end of the sealing gasket; the pressing assembly comprises a gas cylinder, a cylinder, a pressure release valve, a first electromagnetic valve and a second electromagnetic valve, the end of a piston rod of the cylinder abuts against the outer side end of the sealing plate, the pressure release valve is arranged in a rodless cavity of the cylinder, the gas cylinder communicates with the rodless cavity of the cylinder through a first pipeline, the gas cylinder communicates with the cabin through a second pipeline, the first electromagnetic valve is arranged on the first pipeline, and the second electromagnetic valve is arranged on the second pipeline. The second electromagnetic valve is arranged on the second pipeline, and inert gas is contained in the gas cylinder; and the control assembly is electrically connected with the pressure release valve, the first electromagnetic valve and the second electromagnetic valve. According to the anti-explosion pressure relief system for the ship cabin and the control method of the anti-explosion pressure relief system, the pressure in the cabin can be kept stable, and the problem of fire disasters can be solved.

The present application relates to the technical fields of ship engineering, in particular to a wrenching tool for n-bend joint and a using method thereof, the wrenching tool for n-bend joint comprises a sleeve ring and a wrenching rod, the sleeve ring is detachably sleeved on the outside of the locking sleeve, the circumferential side of the sleeve ring is provided with sleeves at positions opposite to each lug, the first end of each sleeve is arranged towards the center of the sleeve ring, and the first end of each sleeve is sleeved on the outside of each lug; the position of the circumferential side of the sleeve ring provided with the sleeve is connected with a locking mechanism for fixing the sleeve at the position; the first end of the wrenching rod is inserted into the second end of one of the sleeves, and the second end of the wrenching rod extends away from the sleeve ring; when in use, the lugs do not need to be knocked, the vibration generated by knocking the lugs is avoided, and the adverse effects of the n-bend joint on the stability of the pipeline caused by the way of installing or dismounting the lugs by knocking are avoided.

The invention relates to the field of ship engineering technology, and specifically discloses a method for measuring the spatial angle of a dredger rake pipe. The method collects motion data of a hull and a rake pipe in real time, uses median filtering to remove high-frequency noise, extracts features and constructs a comprehensive feature vector, uses a fuzzy inference system to separate the nonlinear influence of hull sway and rake pipe posture, and corrects the posture estimation result in combination with real-time error feedback. The estimation result is dynamically optimized through Bayesian estimation and particle filtering algorithms, and the system deviation is corrected, thereby improving the measurement accuracy. The system also evaluates the overall measurement accuracy in combination with a machine learning model, automatically adjusts measurement parameters and processes, and improves the system adaptability and robustness. For inaccurate measurement results, the system can analyze the causes and re-measure the spatial angle to ensure long-term stable operation.

The invention belongs to the technical field of ship engineering, and discloses a marine laboratory board convenient to hoist and install, which comprises a board body, the hanging ring is placed in the plate body; and the locking mechanism is arranged in the hanging ring, the locking mechanism comprises a threaded rod, the hanging ring is rotationally connected to the interior of the hanging ring, the bottom end of the surface of the threaded rod is sleeved with a sliding plate in a threaded mode, and the top end of the surface of the threaded rod is fixedly sleeved with a worm wheel. A first sliding block can drive a connecting plate and a locking plate to move towards the surface of a lifting hook, then the lifting hook can be locked, finally, a worm is rotated to enable the locking plate to move relatively, the lifting hook is locked, the situation that the lifting hook slides in a lifting ring during lifting is avoided, a plate body can be lifted and moved more stably, and the lifting efficiency is improved. In addition, the mounting precision and accuracy of the plate body are improved, and it is ensured that the plate can be mounted according to design requirements.

The application relates to the technical field of ship engineering, in particular to a ship mechanical fault alarm detection device, which comprises a power cabin, a connecting rod arranged on one side of a moving plate, an L-shaped plate installed on one side of the connecting rod, a cylinder arranged on one side of the L-shaped plate, a connecting plate fixedly connected with one end of the cylinder, a processor arranged on the upper side of the connecting plate, an alarm installed on one side of the processor, a buzzer installed on the other side of the processor and a signal transceiver arranged on one side of the buzzer.

The invention relates to a method for calculating the hot spot stress at the end part of a horizontal rod piece for supporting a transverse bulkhead, which belongs to the field of ship engineering structure design, and comprises the following steps of: calculating through a coarse mesh finite element to obtain node displacement, and determining the hot spot position at the end part of the rod piece; relative displacements of all the horizontal rod pieces are calculated, and then nominal stresses of all the horizontal rod pieces are calculated; or the nominal stress is obtained directly according to the coarse mesh finite element calculation result; combining each stress concentration coefficient corresponding to each hot spot; and calculating the hot spot stress. The invention provides a hot spot stress simplified calculation method based on a coarse grid calculation result (nominal stress) and a stress concentration coefficient, which is beneficial to improving the evaluation efficiency.

The invention belongs to the technical field of ship engineering CAD three-dimensional modeling, and particularly relates to a mother type ship transformation design method and system based on a three-dimensional geometric model, and the method comprises the steps: obtaining a three-dimensional profile point coordinate set of a mother type ship, and constructing a ship body profile according to an NURBS curve formed by the profile point coordinate set; modifying the coordinates of the data point; generating a CAD three-dimensional model of the target ship based on the modified data point coordinate transformation; according to the method, various molded line transformation methods are randomly combined and selected, molded line transformation operation, driving point modification and molded line modification are carried out in a program one by one according to the sequence of linear transformation, piecewise linear transformation, a 1-CP method and middle cross section coefficient transformation, and finally a transformed molded line result is displayed. The method has the advantages of reducing the number of times of repeated modeling and simulation verification, supporting collaborative optimization of multiple parameters such as the main scale, the prismatic coefficient and the buoyancy center position, ensuring that the molded line meets the function and performance requirements, being capable of being implemented in domestic CAD software, and reducing dependence on foreign software.

The invention discloses a dredge ship energy consumption management and accurate mud suction control method, and relates to the technical field of ship engineering and intelligent control, and the method comprises the following steps: collecting a plurality of operation control strategies associated with a dredge ship for performance verification, and filing the optimal control strategy passing the performance verification; based on the received ship operation starting signal, whether operation authority is granted to the ship system or not is judged; and if the ship system is granted by the operation authority, selecting a reference regulation and control scheme of the ship from the archived optimal control strategy, and issuing a first regulation and control instruction to the ship system. Through performance verification, only the control strategy is archived and optimized, compatibility of the strategy and the ship working condition is ensured, the abnormal risk in the mud suction process is reduced, and the operation efficiency is improved; based on threshold comparison of the energy efficiency improvement rate and the stability index, data-driven strategy optimization is realized, the unit operation energy consumption can be averagely reduced, and the resource utilization rate is improved.

The invention discloses a CFD (computational fluid dynamics) method-based seaplane gas-water power decoupling cooperative solving method and an asynchronous coupling and high-fidelity simulation method thereof under an unsteady condition, belongs to the technical field of ship engineering structure aerodynamic force and water power calculation, and aims to solve the problem that in the prior art, when solving the problem of hydroplaning of a seaplane, the problem of the prior art is solved. And pneumatic and hydrodynamic loads need to be solved at the same time. According to the method, aerodynamic force is solved by adopting a single-phase flow solver, and unsteady aerodynamic responses of wings and a fuselage of the seaplane during hydroplaning are captured; a two-phase flow solver is adopted to simulate the nonlinear hydrodynamic behavior of the fuselage of the seaplane in waves; a single-phase flow solver based on aerodynamic force and a two-phase flow solver based on hydrodynamic force are iterated on different time steps for decoupling cooperative solution, and the stress characteristic and motion response of a seaplane under the wave working condition are accurately simulated.

The embodiment of the invention provides a drag reduction effect AI control method and system for a natural-ventilation mixed cavitation hydrofoil, and relates to the technical field of ship engineering. Executing a cavitation flow experiment to obtain an input data set and an output data set; performing feature extraction based on the input data set and the output data set to obtain a cavitation coverage area rate, a flow field instability feature parameter, an interface evolution stability index and a signal cavitation index, and integrating into a response data set; constructing a comprehensive data source set based on the input data set, the output data set and the response data set; and determining the influence level of the current ventilation behavior based on the response data set, and determining an optimal design scheme based on the influence level and the comprehensive data source set. The method overcomes the limitation that a traditional static black box model only depends on an input-output relation and lacks process feedback, and effectively distinguishes operation states which are temporarily low in resistance but about to be unstable from operation states which are really stable and efficient.

The application relates to the technical field of ship engineering, and discloses a wave-blocking water-tight structure for a ship, the ship comprising a bow house deck, the bow house deck being provided with deck machinery, and comprising the following components: a wall plate assembly, which is installed on the bow house deck; and a wave-blocking shell, which is installed on the bow house deck, the rear end of the wave-blocking shell being connected to the wall plate assembly, the wave-blocking shell, the wall plate assembly and the bow house deck jointly defining a protection cavity, and the deck machinery being accommodated in the protection cavity. The wave-blocking water-tight structure for the ship can effectively improve the sealing performance of the bow house deck area, realize all-around protection of the deck machinery, and optimize the buoyancy distribution and the navigation stability of the ship.

The invention belongs to the technical field of ship engineering, and particularly discloses a ship cabin door measurement and control system which comprises a controller, a power driving unit, a rotating actuator, a transmission device, a deceleration braking device and a position feedback unit. The controller is provided with a two-channel control system, the two-channel control system independently carries out discrete signal and sensor signal acquisition work and calculation work of the main control module, data exchange and synchronization are carried out between the channel control systems through a two-port RAM, and the channel control systems jointly monitor the cabin door measurement and control system for the ship. Through the redundancy design of the double-channel control system and the combination of multiple sensors, when one channel control system breaks down, the other channel control system can continue to work normally, it can be ensured that the cabin door can be accurately closed under various conditions, and the situation that water enters a ship and other potential safety hazards are caused due to the fact that the cabin door is not closed is avoided.

The present invention relates to the field of ship engineering technology and discloses an underwater inboard engine assembly and a method for processing an underwater housing cover thereof, comprising an underwater housing, a drive shaft assembly disposed inside the underwater housing, and a propeller assembly disposed on one side of the underwater housing; the drive shaft assembly comprising a drive shaft, a nylon bushing sleeved on the bottom surface of the drive shaft, a needle bearing sleeved on the bottom surface of the drive shaft, a drive gear sleeved on the bottom surface of the drive shaft, a drive shaft nut threadedly connected to the bottom of the drive shaft, and a positive gear engaged on the left end of the drive gear. The method for processing an underwater inboard engine assembly and an underwater housing cover device thereof, by changing the processing technology to a one-cut processing, relatively increases the service life of the underwater housing cover, reduces the eccentric wear of the propeller shaft, reduces propeller swing, reduces dynamic balance, reduces water resistance, and increases ship speed.