10 results about "Bilge keel" patented technology

The embodiment of the invention discloses a ship bilge keel system and a ship. The bilge keel system comprises a bilge keel cabin, a bilge keel body, a hydraulic automatic control unit, a hydraulic jack set, a connecting toggle plate, a rotating shaft and a sealing limiting unit. The bilge keel cabin is arranged at the joint of a ship bottom plate and a broadside, a bilge keel body is of a triangular prism-shaped structure defined by three rows of coamings and is provided with a first limiting connecting piece and a second limiting connecting piece, and the broadside coaming is in an arc shape along a broadside outer plate and corresponds to an opening of the bilge keel in shape. One side of the side coaming is hinged to a bilge keel opening through a rotary hinge, and the hydraulic automatic control unit can control the hydraulic jack set to stretch out and draw back so as to drive the bilge keel body to rotate along the rotary hinge through the rotary shaft, so that the first limiting connecting piece or the second limiting connecting piece is in matched sealing connection with the sealing limiting unit. The retractable design of the bilge keel is achieved, and the sailing resistance is reduced by recovering the bilge keel.

The utility model belongs to the technical field of ship body stabilization devices for ships, and particularly relates to an adjustable ship body stabilization device for ships, which comprises a bilge keel, a first groove is formed in the bilge keel, a motor is fixedly connected to the inner wall of the first groove, and a first rotating shaft is fixedly connected to the output end of the motor. A second chain wheel is fixedly connected to the outer surface of the first rotating shaft, a first bevel gear is fixedly connected to the side wall of the first rotating shaft, a first moving groove is formed in the inner wall of the first groove, a double-thread lead screw is movably installed on the inner wall of the first moving groove, and a second bevel gear is fixedly connected to the end, close to the first bevel gear, of the double-thread lead screw; the outer surface of the double-thread lead screw is in threaded connection with a moving block. The bilge keel is reasonable in structure, the anti-shaking effect of the bilge keel can be adjusted according to the sea storm condition, and ship navigation stability is facilitated.

The invention relates to the technical field of ship construction, in particular to a ship bilge keel structure. A ship bilge keel structure comprises a ship bilge part and bilge keels arranged on the ship bilge part, the bilge keels comprise bilge keel segments arranged in a segmented mode, every two adjacent bilge keel segments are arranged in a spaced mode, each bilge keel segment is obliquely arranged relative to the horizontal plane, a base plate is fixedly arranged on a curved-surface shell plate, and the base plate is fixedly connected with the ship bilge part. The bilge keel is fixedly arranged on the base plate in a segmented mode. The bilge keels are arranged at intervals in a segmented mode, the stress of the single bilge keel segment can be reduced conveniently, the bilge keels are arranged on the base plates in the segmented mode, the stress area can be increased on the base plates, and stress concentration is reduced; the inclined bilge keel has a water diversion effect; the problems that in the prior art, a bilge keel and a ship bilge need to bear large water pressure loads, so that welding seams are prone to being damaged, or the rigidity of the bilge keel is larger than that of a bilge outer plate, and the hull outer plate structure is prone to being damaged are solved.

A method for measuring the hydrodynamic pressure of a bilge keel on a surface ship includes: 1. Determining the main structure and bilge keel structure of a ship model, with a scale ratio of λ, and determining the positions of n measurement nodes located on the lower surface of the bilge keel; 2. Modeling the ship model from step 1 and comparing the strain at each measurement node with the strain at the lower surface of the bilge keel by applying water pressure, and calculating the strain transfer coefficients C1 to C2 corresponding to the n measurement nodes. n 3. Construct the boat model from step 1, and conduct a water immersion test in the test tank to obtain the water velocities V1 to V at n measurement nodes. n The micro-strain με1~με at n measurement nodes was measured. n 4. Obtain the hydrodynamic pressure P at the measurement node of the ship model. i :P i =με i / C i , i = 1, 2, 3…n; V. Obtain the actual ship hydrodynamic pressure SP at the corresponding measurement node positions of the bilge keel on the actual ship. i And the actual ship's entry speed SV i SP i =λ×P i This allows us to obtain hydrodynamic pressure data for the bilge keel under different working conditions, which can be used to assist in bilge keel design and improve the reliability of the bilge keel structure.

The utility model relates to a bilge keel assembly applied to a ship and the ship with the bilge keel assembly. The bilge keel assembly comprises a plurality of bilge keel single bodies, in the extending direction of the bilge keel assembly, the discharge edges of every two adjacent bilge keel single bodies are spaced to form discharge spaces, the bilge keel single bodies are provided with first pressure reduction spaces along the discharge edges, and the first pressure reduction spaces communicate with the discharge spaces. And at least one part of area, close to the first pressure reduction space, in the bilge keel single body is a first deformable area. According to the arrangement, the bilge keel single body comprises the first pressure reduction space communicated with the drainage space, and at least part of the area, close to the first pressure reduction space, in the bilge keel single body is the first deformable area. Therefore, the bilge keel assembly can consider the total area size and the connection reliability of the bilge keel assembly and the hull.

The bilge keel capable of reducing the turning radius of the ship comprises a bilge keel main body which is formed by connecting double plates at a certain included angle, is arranged at a bilge part of a ship body and forms a cavity with a wedge-shaped section with the ship body; the bilge keel rotating plate is arranged on the bilge keel main body, and one end of the bilge keel rotating plate is hinged to the bilge keel main body; the adjusting mechanism is connected between the bilge keel main body and the bilge keel rotating plate and is used for adjusting the opening angle of the bilge keel rotating plate; the input end of the control system is connected with a sensor installed on the ship body, the sensor monitors the sailing state of the ship in real time, and the output end is connected with the adjusting mechanism. While the seakeeping performance of the ship is improved, the turning radius of the ship can be effectively reduced, and the maneuverability of the ship is improved.

The present application relates to the ship technology field, especially a kind of single-layer board form's bilge keel web lofting method and ship, single-layer board form's bilge keel web lofting method is by using twice projection, first by projection obtains the impact potential of second projection point and the elongated rib distance between adjacent first projection point, then using elongated rib distance carries out secondary projection along the height direction, using impact potential correction data, then obtains the rib position line after bilge keel web unfolding and the outer mouth line after bilge keel web unfolding. By using impact potential to calculate the distance of the normal point on the outer mouth line found in the second projection after elongated rib distance to the point to be unfolded, the lofting process of the whole bilge keel web is retained, the quality traceability and improvement of bilge keel manufacturing process are facilitated, and the bilge keel lofting result is facilitated to be tested.

The application discloses a welding correction method and device for a ship, a storage medium and a product, and relates to the field of shipbuilding. The method comprises the following steps: according to the segmentation type of a segmentation area, surveying an initial position point of a bilge keel pad on the segmentation area; measuring an initial position point deviation value of the bilge keel pad from a target pad of a segmentation frame in the segmentation area; correcting the initial position point of the bilge keel pad according to the target pad deviation value to obtain a target position point of the bilge keel pad; if the bilge keel pad has been welded on the segmentation area according to the target position point, detecting the actual position point of the bilge keel pad welded on the segmentation area, and the actual included angle between the thickness surface of the web plate and the upper surface of the bilge keel pad; generating a welding correction measure, and the content of the welding correction measure is that the bilge keel pad is corrected from the actual position point to the target position point, and the web plate is corrected from the actual included angle to a target included angle. The twice correction mechanism improves the installation precision of the bilge keel assembly position.

The application provides a determination method of bilge keel installation position, which determines the installation position of the middle bilge keel, simulates the streamline distribution of the ship by using CFD technology, obtains the streamline of the installation position of the middle bilge keel, and further obtains the installation position of the bilge keel on other ship stations, which is convenient and fast, does not need to determine a separate test period, is not limited by time and space, can be carried out synchronously after the determination of the ship line scheme, provides input for the ship structure design, significantly shortens the ship design cycle, saves the design cost, and improves the ship design efficiency; does not need to use oil film or paint to coat the surface of the ship model, avoids the damage to the surface of the ship model, and avoids the influence on the results of the later test of the propeller and energy-saving device, and improves the ship design precision; the method can be applied to all steel ships, and has wide popularization and use value.