15results about How to "Reduce sailing resistance" patented technology

The invention discloses a marine empennage, which relates to the technical field of ships, and comprises a ship shell of a wave-shaped flat bottom structure, and the upper end of the ship shell is fixedly connected with a deck used for covering the space in a ship and horizontally dividing the space into layers; the side, close to a deck, of the hull is fixedly connected with a cabin used for storing materials and allowing sailors to work and live, the outer wall of the side, away from the cabin, of the hull is fixedly connected with an empennage plate body used for keeping course stability and providing rotation or trim adjusting capacity, and dynamic wingspan expansion mechanisms are arranged on the two sides of the upper end of the empennage plate body. An arc wing guide swing mechanism is arranged at the center of the upper end of the empennage plate body, a trapping screen wing mechanism is arranged on one side of the tail end of the empennage plate body, plate wings and an electric telescopic rod are matched with each other, and the stress area of the empennage can be increased by improving the sailing performance and expanding the wingspan; therefore, larger lift force is generated under the condition of the same wind speed or water flow.

The invention discloses an automatic control method for ship running. The method comprises a distance monitoring method and / or a fleet marshalling control method in an automatic berth state. When it is detected that the ship enters the berthing state, the offshore distance of the ship in the future time period is predicted through a distance monitoring method; and when it is detected that the ship is in the fleet marshalling navigation state, the driving state of the ship is controlled through a fleet marshalling control method. The method has the advantages that the berthing state of the ship can be monitored, the distance between the ship and the shoreside in a period of time in the future can be predicted, the course and the speed can be conveniently adjusted according to prediction, and therefore the requirement for the berthing state of the ship under automatic or manual control is met.

The utility model discloses a portable movable marine ranch platform, which relates to the technical field of marine culture, and comprises a platform main body and a first propeller, the platform main body is provided with a plurality of stand columns, the plurality of stand columns are arranged along the periphery of the platform main body, and the adjacent stand columns are connected through nettings to form a culture net cage; the first propeller is detachably connected to a stand column at the rear end of the platform body through a connecting piece and used for driving the platform body to advance. According to different moving requirements, the platform can be pushed to move through the externally-hung propellers, and flexibility and adaptability are greatly improved.

The invention relates to the technical field of ships, and particularly discloses a stern energy-saving device and a double-propeller ship, the stern energy-saving device comprises a rudder blade, a propeller shaft, propellers and vortex elimination fins, the cross sectional area of the rudder blade is gradually reduced from top to bottom, the propeller shaft comprises a connecting section and an extending section, the connecting section and the extending section extend in the axial direction of the propeller shaft and are connected, and the connecting section is connected with the extending section. The rudder blade is integrally arranged above the axis of the extending section, the rear end of the extending section extends to the position below the rudder blade, the propeller is fixedly arranged on the connecting section, the vortex eliminating fin is fixedly arranged on the connecting section or the extending section, and the vortex eliminating fin is arranged behind the propeller. According to the stern energy-saving device, the vortex eliminating fin, the propeller shaft extending section extending to the position below the rudder blade and the rudder blade located above the axis of the propeller shaft extending section are matched with one another, so that resistance borne by the rudder blade can be reduced, energy loss caused by trailing vortex is reduced, the ship navigation resistance is reduced, the propelling efficiency of a propeller is improved, and the service life of the propeller is prolonged. And the rapid performance of the ship is improved.

The utility model relates to the technical field of underwater unmanned vehicles, in particular to an antenna overturning cover plate device and a cover plate system of an underwater unmanned vehicle. The antenna overturning cover plate device comprises an antenna overturning cover plate, a supporting frame is arranged on the antenna overturning cover plate, and a connecting rod is arranged on the supporting frame; one end of the fixed roll-over stand is connected with the body of the underwater unmanned vehicle, and the other end of the fixed roll-over stand is rotationally connected with the connecting rod; the turnover handle is arranged on the connecting rod in a sleeving manner, and a turnover shaft is arranged on the turnover handle; one end of the hydraulic actuating mechanism is connected with the body, the other end of the hydraulic actuating mechanism is connected with the turnover handle through a turnover shaft, and the hydraulic actuating mechanism drives the antenna turnover cover plate to open or close relative to the body; the auxiliary electromagnetic suction mechanism is arranged on the body; and the suction plate is arranged on the antenna overturning cover plate. The molded lines of the antenna overturning cover plate and the underwater unmanned vehicle are kept consistent, and when the antenna overturning cover plate is in a closed state, the streamline at the top of the underwater unmanned vehicle is complemented, and the navigation resistance is reduced.

The present invention provides a wave-breaking accessory and a wave-breaking ship, which are attached to the front end of the hull of a ship to form a wave-breaking ship, the end of the wave-breaking accessory is recessed to form an attachment surface for attaching the front end of the hull, and the two sides thereof respectively form a first wave-breaking surface and a second wave-breaking surface, and the distance between the first wave-breaking surface and the second wave-breaking surface gradually decreases along the forward direction of the hull. The blade-shaped wave-breaking structure formed by the first wave-breaking surface and the second wave-breaking surface can break the water surface in advance, thereby reducing the impact resistance of waves for the hull; and by adding the wave-breaking accessory to the hull, not only the wave-breaking effect of the hull is improved, but also the underwater projection area of ​​the hull is increased to improve the maneuverability of the ship, and at the same time, the overall longitudinal length of the hull is increased on the water level of the hull, and the sailing resistance is reduced by increasing the longitudinal aspect ratio.

The invention relates to the technical field of ship mechanical engineering, and discloses a multi-beam transducer installation and maintenance system which comprises a ship body, a ship body reserved slot, a rotatable cylinder, a driving assembly and a transducer, the ship body reserved slot is formed in the ship body, an opening of the ship body reserved slot is located in the bottom of the ship body, and the rotatable cylinder is arranged in the ship body reserved slot; the driving assembly is connected with the rotatable cylinder and is fixed on the ship body, the transducer is arranged on the rotatable cylinder, and the driving assembly can drive the rotatable cylinder to rotate and enable the transducer to extend out of a reserved slot of the ship body. The rotatable cylinder is connected to the driving assembly so as to be connected with the ship body, the overall structure is relatively simple and reliable, and it can be guaranteed that the pose state of installation of the multi-beam transducer is accurate.

The utility model belongs to the technical field of underwater unmanned autonomous vehicles, and particularly relates to a rotary positioning device for underwater communication equipment, which is mainly applied to communication equipment of an unmanned vehicle. The utility model discloses a rotary positioning device for underwater communication equipment. The rotary positioning device comprises a driving mechanism and a supporting and rotating mechanism, the driving mechanism comprises a sealing shell and a power source arranged in the sealing shell; the supporting and rotating mechanism comprises a rotating shaft and an adapter plate; the rotating shaft is connected with the driving source, penetrates through the sealing shell and is connected with communication equipment through the adapter plate; and the power source drives the communication equipment to rotate around the axis of the rotating shaft through the rotating shaft. The mechanism is simple in structural design and convenient to operate, not only meets the communication requirements of communication equipment, but also does not increase an aircraft appendage and navigation resistance, and is better in environmental adaptability.

The invention relates to the technical field of coating production, in particular to a preparation method of a ship antirust coating, which comprises the following steps: (1) preparing a primer: carrying out surface modification treatment on nano zinc oxide and graphene nanosheets by using a silane coupling agent, and then uniformly mixing with a base material to obtain the primer; and (2) preparing finishing paint: uniformly mixing the base material and the antifouling micro-capsules to obtain the finishing paint. Modified nano cuprous oxide and methyl silicone oil are used as core materials, urea-formaldehyde resin is formed on the surfaces of the core materials in a wrapping mode to serve as capsule shells, formed antifouling micro-capsules are evenly distributed in a coating matrix to form a submicron structure, and the hydrophobic capacity can be improved in cooperation with slowly-released silicone oil, so that the sailing resistance of a ship is reduced; and the modified nano cuprous oxide in the antifouling microcapsules can be slowly released due to gradual rupture of the antifouling microcapsules, so that the explosion release phenomenon of copper can be prevented, the long-term antifouling effect of the coating can be realized, and the service life of the coating can be prolonged.

The invention relates to the technical field of liftable front steering knuckle systems, in particular to an amphibious vehicle liftable front suspension which comprises a main steering knuckle beam, an adjusting mechanism is movably connected to the interior of the main steering knuckle beam, lifting damping mechanisms are movably connected to the two sides of the top of the main steering knuckle beam, and a steering mechanism is arranged on one side of the bottom end of the main steering knuckle beam. A control mechanism is arranged on one side of the main steering knuckle beam, when the amphibious vehicle runs on the land, the lifting front suspension plays a role of a common steering knuckle, and impact borne by the vehicle in the running process and vibration of a vehicle body are buffered; when the amphibious vehicle runs in water, the lifting front suspension lifts the steering knuckle mechanism and the wheel system through the hydraulic oil cylinder, the purposes of reducing resistance and increasing running speed are achieved by reducing eddy current loss caused by the running mechanism stretching into the water, and the loss of the steering knuckle system can be effectively reduced.

This utility model belongs to the field of planing plate technology and relates to a pressurized water planing plate combination for stabilizing a ship's hull. It includes a hull, with floats fixedly connected to the sides of the hull. Two sets of pontoons are symmetrically fixedly connected to the bottom surface of the hull. The combination plate, composed of an arc plate, a flat plate, an inclined plate, a wing-shaped hull balance plate, and a guide plate, is symmetrically arranged at the bottom of the stern of the hull. This allows the hull to effectively disperse lateral and vertical forces in complex sea conditions, reducing the risk of hull swaying and tilting. Under power drive, the hull can simultaneously guide the water flow to rise rapidly, preventing the bow from tilting during high-speed navigation. This generates lift, allowing part of the hull to leave the water surface, significantly reducing navigation resistance and energy consumption. The floats enhance overall rigidity, improve structural strength and the friction resistance and durability of the hull bottom, and reduce hull maintenance costs. This combination plate design is adaptable to various ship types, not only meeting the navigation needs of different vessels but also improving the stability of the hull during planing.

The invention discloses a rescue boat for buffering wave energy, comprising a hull and an airbag 1 arranged on the lower surface of the hull, the upper surface of the airbag 1 is connected to the lower surface of the hull, the airbag 1 is filled with gas, the air pressure value of the gas satisfies that the area of ​​the airbag 1 multiplied by the upper surface area of ​​the airbag 1 is equal to 2 / 3 to 9 / 10 of the weight of the rescue boat, and the surface of the airbag 1 is made of chlorosulfonated polyethylene material. The invention arranges the airbag 1 under the hull, so that when the rescue boat has a tendency to tilt longitudinally or laterally under the action of waves, a part of the airbag 1 is compressed and deformed, which plays a role in buffering wave energy and can prevent the rescue boat from tilting or heeling. In this way, the longitudinal distribution of the weight of each part or the longitudinal position of the buoyancy center can be avoided without changing the longitudinal distribution of the weight of each part or changing the longitudinal position of the buoyancy center; and the arrangement of the airbag 1 is flexible and diverse, and is arranged in a shape avoiding a driving component or a plurality of airbags 1 on both sides, and the amount of inflation or deflation can be adjusted according to the sea conditions, which is suitable for actual navigation conditions.

The application discloses an underwater vehicle driven by energy storage compressed gas based on supercavitation drag reduction and a driving method thereof. The application uses a power system of compressed gas expansion to provide power for the underwater vehicle, and meanwhile, waste gas of the power system generates a supercavitation to reduce the drag of the vehicle, so that the traditional lithium battery underwater vehicle power system is replaced. The method of coupling the power system and the drag reduction system increases the compactness of the system, reduces the navigation resistance, effectively improves the navigation speed, the endurance time and the high-speed maneuverability of the underwater vehicle, and good benefits are obtained.

The application discloses a polar ship bow ice edge sensing and icebreaking operation assisting method and system, and the method comprises the following steps: acquiring radar images and infrared thermal imaging images of ice layers in real time through a millimeter wave radar and an infrared thermal imager arranged on the bow, extracting reflection intensity of each position of the radar images and temperature gradient of each position of the infrared thermal imaging images, and forming a symbol field of a crack potential at each position of the ice layers; performing multidirectional scanning on the symbol field of the crack potential, searching for a maximum path response chain in each direction, splicing the maximum path response chains in all directions, and generating an icebreaking route of the polar ship; and calculating response weights of each propeller on the icebreaking route according to the symbol field of the crack potential on the icebreaking route of the polar ship and a master control response identification value of each propeller of the polar ship, and distributing propelling power to each propeller according to the response weights.

The invention discloses an icebreaker with variable-angle self-adaptive icebreaking shears, which serves as an efficient large-area sea area icebreaking technology and is mainly applied to icebreaking and ice cleaning operation of sea areas around operation ocean platforms near high-latitude areas and port channels and north circles. According to the icebreaking technology, the defects in the prior art are practically overcome, improvement is conducted on the basis of a double-body icebreaker, and the construction difficulty of the icebreaker is reduced on the basis that the icebreaking width is guaranteed; according to the technology, icebreaking boots are additionally arranged on the basis of a double-body icebreaker, shearing force is applied to an ice layer during icebreaking, icebreaking shears are formed, the icebreaking difficulty is reduced, and meanwhile the breaking degree of the broken ice layer is improved; the technology can adjust the height and the inclination angle of the icebreaking boot according to the actual measurement result of the ice thickness in front of the icebreaking boot, and improves the adaptability of the icebreaker to different ice thickness environments; according to the technology, the independent cabin is installed on the icebreaker, and maintenance is convenient. The method has the characteristics of high feasibility, high efficiency, practicability and the like, and has a wide application prospect in the field of icebreakers.