Abstract:
A passive heave compensator, including an elastic cable, an electromagnetic damping device, a cylindrical sector, and a disc damping plate. The electromagnetic damping device includes a first cylinder including a helical coil, a permanent magnet mechanism disposed in the first cylinder, a first cover plate, a second cover plate, a first sliding shaft, a second sliding shaft, a first spring, a second spring, a first end cover, and a second end cover. The cylindrical sector includes a roof plate, a middle plate, a base plate, a first side plate, a second side plate, and a curved plate. The disc damping plate is disposed around the middle plate of cylindrical sector. The elastic cable is directly connected to the electromagnetic damping device. The electromagnetic damping device is disposed in the central part of the cylindrical sector. The middle plate is disposed between the roof plate and the base plate.
Abstract:
An unmanned semi-submarine, including a main hull; airfoil buoyancy chambers; an antenna; a radar; a propeller; a rudder; and compartments. The airfoil buoyancy chambers include a front buoyancy chamber and a rear buoyancy chamber. The front buoyancy chamber and the rear airfoil buoyancy chamber are longitudinally distributed on the main hull. The radar and the antenna are disposed on the top end of the front buoyancy chamber. The rudder is disposed on the rear buoyancy chamber. The propeller is disposed at the tail of the main hull to drive the unmanned semi-submarine. The horizontal sections of the front buoyancy chamber and the rear buoyancy chamber are symmetrical airfoil. The compartments include a front equipment compartment, a rear equipment compartment, a control equipment compartment, a battery compartment, and a propelling compartment. The compartments are separated from one another using watertight walls.
Abstract:
A method for calculating eccentricity of rotor assembly axis based on radial runout measurement comprises matrix characterization of data and calculation of relative runout value at each point, establishment of a spring equivalent model and calculation of contact force, eccentric direction and magnitude; calculation of relative runout value; establishment of a spring equivalent model to analyze the relationship between force and displacement in each phase of a contact process, and then an uneven contact force at each point is obtained; and determination of eccentricity is to determine the magnitude of eccentricity. Based on the measured radial runout data in production practice, this method realizes the prediction of eccentricity of axis before assembly, improves the coaxiality of rotors after assembly, and has important practical guiding significance for axis prediction as well as assembly phase adjustment and optimization in the assembly process of aero-engine rotor pieces.
Abstract:
An unmanned surface vehicle (USV) including a main body; a slideway; and an automatic recovery unit. The slideway includes pulleys, slide rails, sleepers, end plates disposed at two sides of the sleepers, and baffle plates. The automatic recovery unit includes a buoy, a connection rod, a downhaul, an electromagnetic fixer, a winch, an upper cable, a storage box, and a recovery net. The slideway is fixed on the afterdeck of the main body and the tail end of the slideway sticks out the side boundary of the afterdeck. The baffle plates are disposed on the upper end of the end plates. The vertical height of the end plates is larger than the maximum vertical height of the pulleys and the slide rails. The baffle plates on the upper end of the end plates limit the displacement of the buoy in the vertical direction.
Abstract:
A hydrophone fairing, including: an airfoil-shaped streamline structure having a first half-shell and a second half-shell; a roof plate; and a base plate. The roof plate and the base plate are disposed on two ends of the airfoil-shaped streamline structure, respectively. The first half-shell includes an inner wall provided with a first stiffener, a first support, a second support, a first division plate, and a second division plate which are successively disposed on the inner wall along the direction from the roof plate to the base plate. The altitudes of the first support and the second support are identical relative to the roof plate or the base plate. The roof plate includes a first end and a second end, and the first end includes a first hole to which a rope is attached.
Abstract:
An attitude-adaptive hydrofoil apparatus, including: strut-braced wing assemblies, a horizontal wing assembly, connection plates, and attack angle adjusting plates. The strut-braced wing assemblies each include a bearing, at least one inclined tube, at least one inclined flow-guiding wing, and at least one stop dog. The horizontal wing assembly includes a horizontal tube, at least one horizontal flow-guiding wing, and at least one depth-locating wing. The attack angle adjusting plates each include an angle adjusting end plate having a hole. The strut-braced wing assemblies are symmetrically disposed at two sides of the horizontal wing assembly. The bearing is fixed on a vessel body by welding. The at least one inclined flow-guiding wing is sleeved on the at least one inclined tube, and is limited by the at least one stop dog. The attack angle adjusting plates are disposed at two ends of the horizontal tube, respectively.
Abstract:
A carrying device for a side-scan sonar, including a suspension rod, a hanging rack, and a flange. The side-scan sonar is in fixed connection to the lower part of the hanging rack. The suspension rod includes a suspension unit, a universal joint, and a tension rod. The flange is disposed below the lower part of the tension rod. The hanging rack includes a Z-shaped main cross beam. Two U-shaped hooks are disposed at two ends of the Z-shaped main cross beam for supporting the side-scan sonar. A vertical drag hook is disposed in the inner side of each of the two U-shaped hooks for hanging the side-scan sonar. The flange is fixed in the center of the Z-shaped main cross beam.
Abstract:
The present invention provides a typical rotational part characterization method based on actually measured run-out data. Aiming at the characterization of rotational parts containing morphology data, the present invention proposes a matrix form characterization method in which microscopic run-out data and macroscopic axial size are comprehensively considered. In addition, the method can be applied to an assembly accuracy calculation process, and can characterize a single part containing morphology feature quantities by using only one matrix M. The calculation process of accuracy transfer is simplified, and a high-efficiency calculation model is provided for the prediction of assembly accuracy.
Abstract:
A method for calculating axis deviation of rotor assembly based on end face runout measurement comprises three parts: calculation of three contact points, a triangle judgment criterion and a homogeneous coordinate transformation algorithm of a deviation matrix. Based on the measured end face runout data in production practice, the method realizes the prediction of axis deviation before assembly, improves the concentricity of rotors after assembly, also greatly increases the one-time acceptance rate of assembly and has important practical guiding significance for axis prediction as well as assembly phase adjustment and optimization in the assembly process of aero-engine rotor pieces.
Abstract:
An electromagnetic marine fender, including: a rubber fender, two electromagnet groups, tensile steel ropes, an electric cable, and a waterproof power socket. Each electromagnet group includes at least one electromagnet. The electromagnet coils of the electromagnets have the same winding direction. The two electromagnet groups are disposed on two sides of the rubber fender, and the two electromagnet groups and the rubber fender are connected and fixed as a whole by the tensile steel ropes. The electromagnet is a combination structure including an electromagnet core, an electromagnet coil, an electromagnet steel shell, and a rubber coating covering the electromagnet steel shell from the center outward. The electromagnet coils of the electromagnets of the two electromagnet groups are connected in parallel, and the two electromagnet groups are in electric connection to the waterproof power socket via the electric cable.