324results about "Transmission with propulsive element synchronisation" patented technology

The invention discloses a magnetic adjustment water lubricated bearing and a bearing support control method, which are applied to a large ship propulsion shaft system, and comprise a bearing shell, an electromagnetic excitation module, a batten, a sensor module, a power supply driving module and a control system, a plurality of mounting grooves are formed in the bearing shell; an electromagnetic excitation module is arranged in each mounting groove and generates a variable magnetic field with set intensity; a plurality of magnetically soft alloy segments are arranged on the batten, the magnetically soft alloy segments correspond to the electromagnetic excitation modules one to one, and a magnetic field acts on the magnetically soft alloy segments to generate electromagnetic attraction force; the control system independently controls the excitation current of each electromagnetic excitation module according to data of the sensor module, and generates magnetic fields with different intensities to act on soft magnetic alloy areas at corresponding positions, so that precise control of local supporting rigidity and lubricating gaps of the water-lubricated bearing is realized, unbalance loading and abnormal wear risks are effectively reduced, and the service life of the water-lubricated bearing is prolonged. And the adaptive capacity of the bearing under low-speed heavy load and dynamic disturbance is improved.

The invention relates to a repeatedly detachable magnetic composite water lubricated bearing and a maintenance method thereof.The water lubricated bearing comprises a cylindrical bearing seat surrounding a ship stern shaft and a permanent magnet assembly detachably connected with the bearing seat, a cylindrical sliding bearing is arranged on the inner side of the bearing seat, a notch is formed in the outer side face of the sliding bearing, and the permanent magnet assembly is detachably connected with the bearing seat; the notch penetrates through the sliding bearing in the axis direction of the sliding bearing, a containing groove used for containing the permanent magnet assembly is defined between the notch and the inner side wall of the bearing seat, when the water lubrication bearing is arranged on the outer side of the ship tail shaft in a sleeving mode, the containing groove is located over the ship tail shaft, and the permanent magnet assembly is in sliding fit with the containing groove in the axis direction of the sliding bearing. According to the scheme, the permanent magnet is configured to be in a detachable form, and the permanent magnet can be conveniently maintained after being demagnetized, so that the maintenance cost of the water-lubricated bearing is reduced, and the load of the water-lubricated bearing can be reduced for a long time.

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

The batten type water lubricated bearing comprises a shaft sleeve and a plurality of composite battens which are installed on the inner wall of the shaft sleeve at intervals in the circumferential direction of the shaft sleeve, and the composite battens comprise the first battens installed in a bearing area of the bearing and the second battens installed in a non-bearing area of the bearing. A through type variable cross-section groove is formed in the side, away from the ship stern shaft, of the first batten in the length direction of the first batten, and the cross-section area of the variable cross-section groove is gradually increased from the bow to the stern. The invention further discloses an assembly method of the batten type water lubricated bearing. The first batten is arranged in the bearing carrying area and provided with the variable cross-section groove, so that the rigidity of the first batten is gradually reduced in the direction from the bow to the stern, axial gradient rigidity distribution is formed, the low-rigidity area at the stern end can adapt to deformation of the stern shaft to be adjusted in a self-adaptive mode, local stress concentration is reduced, and the stability of the stern end is improved. And a high-rigidity area at the bow end maintains necessary bearing strength, so that the axial load of the bearing is homogenized as a whole.

The utility model discloses a gearbox for an oil-electricity double-engine ship. The gearbox comprises a box body, the diesel oil input component comprises a first input shaft, a first driving gear is sleeved on the first input shaft, and the first input shaft is provided with a first transmission gear and a first clutch; the reversing shaft part comprises a reversing shaft, a second driving gear is sleeved on the reversing shaft, the reversing shaft is provided with a second transmission gear and a second clutch, and the second transmission gear is meshed with the first transmission gear; the motor input component comprises a second input shaft, the second input shaft is sleeved with a third driving gear in an empty mode, the third driving gear is meshed with a first driven gear, the second driving gear is fixedly sleeved with the first driven gear, and the second input shaft is provided with a third clutch; the output shaft component comprises an output shaft and a second driven gear, and the second driven gear is meshed with the first driving gear and the second driving gear. According to the scheme, the diesel engine or the motor is independently used for driving, intelligent switching of the diesel engine and the motor can be achieved at any speed, oil consumption is reduced, and power performance is improved.

An outboard motor includes a steering mechanism including a pinion located in a central portion of an outboard motor body in a right-left direction and operable to rotate together with the outboard motor body, a rack operable to linearly move to rotate the pinion, and a rack position detector on a first side of the rack opposite to the pinion to detect a position of the rack.

The invention discloses a stern shaft sealing device for a ship, and relates to the technical field of ship equipment. The device comprises a tail shaft barrel, a tail shaft, a sediment intercepting assembly, a first sealing unit and a pipeline system. And a sealing structure is arranged in a gap between the stern shaft and the stern shaft barrel. The first sealing unit comprises four sealing leather cups which are arranged in the axial direction and divide the interval into a first installation cavity, a gas cavity, a second installation cavity and a cooling liquid cavity, and the pipeline system is communicated with the gas cavity and the cooling liquid cavity so as to maintain pressure. The core is a buffer structure in the first mounting cavity and the second mounting cavity, and the buffer structure comprises a sealing ferrule, an adjusting assembly and an abutting assembly. When the seawater pressure suddenly increases, the buffer structure converts impact kinetic energy into elastic potential energy and gas compression potential energy through elastic deformation, pressure conduction and the like, pressure buffering is achieved, meanwhile, the sealing performance is dynamically enhanced, seawater backflow is prevented, the ship navigation safety is guaranteed, and the reliability and stability of the sealing device are improved.

The invention relates to the technical field of ship shafting measurement, and discloses a polar region ship shafting comprehensive measurement system and method, and the system comprises a data collection module, a preprocessing module, a data processing module, and an evaluation module. The data acquisition module acquires a strain signal, a vibration acceleration signal, a temperature signal, an axial displacement signal and a radial displacement signal of a shaft system through a sensor group, and the preprocessing module performs wavelet packet decomposition and adaptive threshold denoising, mean filtering and triple standard deviation criterion abnormal value elimination processing on the signals. The data processing module fuses the data of the same physical quantity based on an improved Kalman filtering algorithm and dynamically adjusts the weight of the fused data to obtain final optimized data, and the improved Kalman filtering algorithm comprises the step of introducing a temperature drift compensation factor into a state transition equation, and the evaluation module predicts potential fault types and development trends through an operation state evaluation model based on the optimization data.

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

The utility model relates to a non-contact connection propeller transmission structure of a marine in-cabin machine. The non-contact connection propeller transmission structure comprises a ship body and a power assembly, the ship body is provided with a fixing groove communicated with the outside, a fixing pipe is arranged in the fixing groove, a propeller for bearing power output is arranged in the fixing pipe, a sealing part used for sealing communication between the ship body and the outside is arranged in the fixing pipe, and a sealing gasket is arranged outside the fixing pipe and at least used for filling a gap between the fixing pipe and the fixing groove. One purpose of the utility model is to improve the waterproof performance of the motor so as to prolong the service life of the motor.

Drive unit for a foil-supported watercraft, comprising a drive motor, a flexible shaft and a propeller unit, characterized in that the drive motor is arranged in the support body and is connected to the propeller unit located outside the support body via the flexible shaft.

The invention discloses an air sealing system for a ship stern shaft sealing device, which relates to the technical field of ship stern shaft sealing and comprises a shaft tube body, a sealing structure is mounted at the end of the shaft tube body, an inlet pressure sensor is mounted at the air inlet end of the sealing structure, and a control mechanism is mounted on the inlet pressure sensor through a pipeline. A front oil tank mechanism is installed at the tail end of the shaft tube body, and the control mechanism comprises a control frame, an air control unit, a discharging and collecting unit, a lubricating oil control unit, a pump body and a master controller. Through the arrangement mode that the sealing mechanism and the control mechanism are matched, the pressure of each cavity is dynamically adjusted in a stepped mode according to the ship draft depth and the working condition, a reliable pressure gradient barrier is constructed, seawater invasion and lubricating oil leakage are effectively prevented, the sealing rings and the shaft necks are in a non-contact or micro-contact state, and the service life of the sealing rings and the shaft necks is prolonged. Therefore, mechanical friction and abrasion are reduced fundamentally, and the service life of the sealing ring is prolonged.

A hybrid power module for ship propulsion relates to the field of marine power technology. To address the problems of existing ship propulsion modules, which often employ electric motors, traditional heat engines, and parallel gearboxes for propulsion, resulting in large, complex systems with low space utilization and poor operational stability, this invention utilizes a highly integrated parallel reduction gearbox, a flexible coupling, and an electric motor. This achieves high power density and reduces the size by half compared to existing ship propulsion modules, improving hull space utilization. Furthermore, it can directly drive the propeller shaft without external power. With increased power, a diesel engine or gas turbine can be introduced to drive the propeller shaft in parallel with this module. The forward and reverse rotation of the propeller shaft can be achieved by engaging or disengaging forward and reverse clutches. This module enables operation and switching of six different main engine modes, providing high redundancy in the power system and ensuring operational stability. It has a wide range of applications. This invention is applicable to ships.

The present application relates to a kind of support structures for rim propeller, flange plate is used as the force element of support structure for rim propeller, the outer side ring of flange plate and flange hole are directly connected with the motor shell of rim propeller, for transmitting the thrust load on the support structure for rim propeller to motor shell;Radial bearing sliding assembly and top wheel sliding assembly are connected on the flange plate by multiple sets of limiting blocks, thrust pad is installed on the inner side ring of flange plate, to provide axial support for rim propeller.The present application can provide radial, axial and starting auxiliary support for rim propeller, overall installation is convenient, can effectively avoid the problem of difficult starting of rim propeller;According to the wear condition of tile, the clearance between friction pair can be compensated in real time, so that the lubrication clearance is kept in a reasonable range, to ensure the stability of lubrication performance, without entering the dock to disassemble whole machine for replacement, in addition, the compensation method can maximize the use of tile, without causing material waste, reduce maintenance and use cost.

A motor assembly includes an electric motor and an overrunning clutch wherein a shaft of the overrunning clutch is adapted to engage with an external engine, the shaft is connected to an inner member of the overrunning clutch, and the outer member of the overrunning clutch is adapted to engage with a rotor shaft of the electric motor.

To provide a hull direct connection type propulsion device for a reciprocal rotation propeller greatly improving propulsion efficiency of an electric propulsion vessel by being composed so that the reciprocal rotation propeller loaded on the electric propulsion vessel is directly coupled to a hull, and a manufacturing method of the same.SOLUTION: A hull direct coupling propulsion device includes: a relative rotation propeller composed of a front propeller and a rear propeller; a double rotor electric motor generating respective rotational directions in a front propeller and a rear propeller; and a double shaft coupling the relative rotation propeller and the double rotor electric motor.SELECTED DRAWING: Figure 1

The utility model discloses a stern shaft bracket fairing, a boat power device and a boat, the stern shaft bracket fairing comprises a main body, the middle part of the main body is provided with a through hole for a stern shaft to pass through, the outer diameter of the main body is gradually increased towards one side of a shaft hub of a stern shaft bracket, the side of the main body towards the shaft hub is provided with a bottom wall, the bottom wall is provided with a fixing hole, and the fixing hole is provided with a through hole. And the shaft sleeve is fixedly connected with the hub. Through the conical structure design that the outer diameter of the main body is gradually increased towards the shaft hub side, a gradually-changed guide surface can be formed in the fluid flowing direction, and the impact resistance between the front end of the shaft hub of the stern shaft bracket and a water body during sailing is remarkably reduced; moreover, the flow guide cover can be rigidly connected with the shaft hub through a mechanical fastener due to the arrangement of the bottom wall fixing hole, so that an integrated protection structure is formed, and the structural deformation and displacement risks generated under the navigation dynamic load are avoided; the three functions of resistance reduction, cavitation corrosion inhibition and foreign matter blocking are integrated on the whole, finally, the power transmission efficiency of the ship is improved, and the service life of the propeller and the service life of the bearing are prolonged.

Systems and methods for utilizing nuclear-based marine craft to generate electricity for external or grid usage are disclosed. In accordance with some embodiments, the system may include a nuclear-based marine craft having a propeller shaft and an electrical generator coupled external to the marine craft and configured to transmit generated electricity. In accordance with some other embodiments, the system may include a nuclear-based marine craft having a nuclear reactor and a turbine, a dock or barge having its own turbine and electrical generator, a steam outlet pipe connecting the nuclear reactor to the dock or barge turbine, and a steam inlet pipe connecting the dock or barge turbine back to the nuclear reactor, whereby heated steam from the nuclear reactor spins the dock or barge turbine, which then powers the electrical generator on the dock or barge to generates electricity.

A shaft seal includes a shaft engaging portion configured to couple to a shaft extending through a wall. The shaft seal includes a flange configured to sealingly engage the wall. The shaft seal includes a body extending between the shaft engaging portion and the flange. The seal is configured to allow radial and axial movement of the shaft relative to the wall while maintaining a seal between the flange and the wall.

The present invention relates to a shaft epoxy resin forging and a shaft forging epoxy coating method, comprising a shaft forging, wherein the surface of the shaft forging is coated with a bottom adhesive resin layer, a bottom spiral glass fiber reinforced plastic reinforcement tape is provided on the bottom adhesive resin layer, the bottom spiral glass fiber reinforced plastic reinforcement tape surface is impregnated with adhesive resin to form a second adhesive resin layer, the second spiral glass fiber reinforced plastic reinforcement tape is wrapped around the second adhesive resin layer, the second spiral glass fiber reinforced plastic reinforcement tape surface is impregnated with adhesive resin to form a third adhesive resin layer, the third spiral glass fiber reinforced plastic reinforcement tape is wrapped around the third adhesive resin layer, the third spiral glass fiber reinforced plastic reinforcement tape surface is impregnated with adhesive resin to form a fourth adhesive resin layer, the fourth spiral glass fiber reinforced plastic reinforcement tape is wrapped around the fourth adhesive resin layer, and a fifth adhesive resin layer (10) is coated on the fourth spiral glass fiber reinforced plastic reinforcement tape (9). Advantages: The coating layer produced by this method is uniform and dense, with no defects such as bubbles and protrusions on the surface. It can completely isolate the shaft from contact with seawater or seawater vapor, achieving the purpose of corrosion and rust prevention.

The utility model provides a split type generator rotor expansion support for a ship transmission shaft, relates to the technical field of ship power generation, and is mainly used for solving the problem that a locking ring cannot form a complete inner conical surface after being assembled in the prior art. The split type generator rotor expansion support for the ship transmission shaft comprises a power output ring and a locking ring. The locking ring is composed of a split body A and a split body B, two I-shaped grooves are formed between the split body A and the split body B, I-shaped key strips are installed in the I-shaped grooves, and the split body A and the split body B are connected into an annular body through the I-shaped key strips. When the expansion bracket is assembled, the split body A and the split body B can be connected into an annular body through the two I-shaped key strips, so that the influence of the kerf width on the assembly is eliminated, a complete inner conical surface can be formed after the locking ring is assembled, the tightening force applied to the power output ring by the locking ring is improved, and the service life of the power output ring is prolonged. And the output torque of the whole expansion bracket is increased.

The purpose of the present disclosure is to provide a hull-directed propulsion system of a contra-rotating propeller and a method for manufacturing the same, in which the contra-rotating propulsion unit mounted on an electric propulsion vessel is directly connected to the hull, thereby significantly improving the propulsion efficiency of the electric propulsion vessel. In order to achieve the purpose, the present disclosure provides a hull-directed propulsion system of a contra-rotating propulsion unit, comprising: a contra-rotating propulsion unit including a front propeller and a rear propeller; a dual-rotor electric motor configured to generate rotational directions of the front propeller and the rear propeller, respectively; and a dual shaft connecting the contra-rotating propulsion unit and the dual-rotor electric motor.

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.

The utility model discloses a lifting type full-rotation steering oar lifting sealing structure which comprises a sealing seat and a lifting shaft, a sealing cavity is formed in the sealing seat, the sealing cavity penetrates through the sealing seat in the vertical direction, the lifting shaft penetrates through the sealing cavity, and the lifting shaft is in sliding fit with the sealing seat; a first sealing ring, a second sealing ring, a guide ring and a third sealing ring which are sequentially arranged from top to bottom are mounted between the lifting shaft and the sealing seat, the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are mounted on the sealing seat, and the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are in sliding fit with the lifting shaft. In the scheme, the three sealing rings form a triple sealing barrier between the sealing seat and the lifting shaft, so that seawater intrusion can be effectively prevented; the guide ring can play a role in guiding and can also bear thrust generated when the propeller works, and the situation that the sealing effect is affected by displacement of the lifting shaft is prevented.

A computer implemented diagnostics system for a marine propeller drive unit is provided. The diagnostics system comprising processing circuitry connected to a speed sensor system and to a control unit associated with the electric machine. The speed sensor system is arranged in connection to the differential arrangement to provide propeller speed data to the processing circuitry indicative of a speed of rotation of at least one of the propeller axles of the self-balancing propeller drive unit. The control unit is arranged to provide motor current data to the processing circuitry indicative of a motor current drawn by the electric machine. The processing circuitry is arranged to monitor the motor current data from the control unit, and the propeller speed data from the speed sensor system, and to classify a state of the self-balancing propeller drive unit into a pre-determined number of states comprising one or more fault states, based on the motor current data and on the propeller speed data. The processing circuitry is arranged to trigger an action by the diagnostics system in case the state of the self-balancing propeller drive unit is classified as a fault state.

The embodiment of the invention provides a propeller hub sealing structure and device and a ship, the structure comprises an inner gland, a shaft sleeve is sleeved with the inner gland, the inner gland is in clearance fit with the shaft sleeve and a propeller, and the end face, close to one side of the propeller, of the inner gland is watertight through a radial sealing ring; and the outer gland is sleeved on the shaft sleeve on the outer side of the inner gland and is in clearance fit with the shaft sleeve and the inner gland, and the inner ring side of the outer gland is close to the end position of the inner gland, so that the contact surfaces of the outer gland and the shaft sleeve as well as the outer gland and the inner gland are sealed through an axial sealing ring. According to the embodiment of the invention, a traditional sealing gland is optimized into a combined form of the inner gland and the outer gland, and the axial sealing ring and the radial sealing ring are mounted in two independent steps, so that the process is simplified, and the synchronous mounting difficulty is reduced; furthermore, the inspection hole is formed in the inner gland, so that the sealing effectiveness can be inspected under the condition that the gland is not disassembled, the daily maintenance is simple, and the safety effect is remarkable.

The invention provides an underwater combined sealing type shaftless propeller. The underwater combined sealing type shaftless propeller comprises a machine shell, a split type high-precision rotor, a stator and a combined sealing system. Aiming at the difficulty of underwater sealing, the invention designs a pre-tightening expansion type sealing structure, and a wave spring is utilized to compress a rubber sealing gasket through a rigid gasket, so that the rubber sealing gasket expands in the radial direction to block a shell gap; and meanwhile, dynamic and static ring attached type mechanical sealing is adopted. In order to solve the problem of silt clamping stagnation, a centrifugal sand throwing inclined plane is designed in the device and is matched with an oil storage ring, so that slow permeation lubrication of lubricating grease and adsorption and capture of tiny sand grains are realized. The underwater self-lubricating sealing device is compact in structure, high in sealing reliability, excellent in silt resistance and self-lubricating performance and suitable for various underwater unmanned equipment.

The utility model discloses an electric boat power system installation matching device which comprises a driving motor, a gear box and a propeller, the output end of the driving motor is connected with the input end of the gear box, and the driving motor, the gear box, the propeller, a transmission rod, a positioning piece and a blade are used in cooperation. The transmission rod and the propeller can be driven to rotate through the driving motor and the gear box, so that driving force can be provided for the boat, when the transmission rod rotates, the positioning piece and the blade can be driven to rotate, aquatic plants and other sundries in water wound around the propeller can be cut, and then normal operation of the driving motor is guaranteed; through cooperative use of the access hole, the side plate and the locking assembly, the side plate can be quickly disassembled and assembled through the locking assembly, so that the interior of the gearbox can be conveniently maintained through the access hole, and the use convenience of the device is further improved.

The invention relates to a low-vibration noise water-lubricated bearing bush with a bionic snake scale microstructure and a preparation method thereof, and aims to solve the problem of abnormal friction noise of ship water-lubricated rubber and medium carbon steel bearings in a complex seawater environment. The invention provides a method for preparing a bionic snake-shaped scale skin micro triangular array on the surfaces of rubber and medium carbon steel materials to inhibit friction noise, which mainly comprises the following steps of: 1, performing feature extraction on a snake belly scale skin microstructure, including parameters such as shape, arrangement mode, feature size and the like of the microstructure; 2, performing similarity simplification on the extracted snake abdomen scale epidermis microstructure; and 3, copying the simplified bionic snake scale microstructure to the surfaces of water-lubricated bearing rubber and medium carbon steel bearing bushes through laser etching and hot stamping technologies. The surface of the micro-triangular array displays the indentation modulus and the friction force which are consistent with the topographic features of the micro-triangular array and change periodically, so that viscous sliding is favorably interrupted, friction noise is inhibited, and the micro-triangular array has important significance on ship concealment and safety.