8results about "Propulsive transmission drive" patented technology

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 invention discloses a double-rotor differential paddle-adjusting type shaftless integrated propelling system and a control method thereof, the system comprises a salient pole motor rotor and a surface-mounted motor rotor, and the two motor rotors are provided with paddles in a shaftless mode to form propelling paddles of a ship. The salient pole motor rotor adopts a salient pole permanent magnet structure design, and the surface-mounted motor rotor adopts a surface-mounted permanent magnet structure. Rotors of the two motors control the blade angles of the blades through the angle difference. The q-axis torque difference of the two rotors is achieved through the change of an Id current command, and when Id is not zero, the torque difference exists between the two rotors, and the angle difference is formed. A high-resolution angle sensor is arranged between the motor rotors and used for monitoring the angle difference between the two rotors in real time and feeding back an angle difference signal to a control system. According to the device, the torque of the two motors is adjusted through a specific double-rotor angle difference control strategy, and therefore the purpose of controlling the angle difference of the rotors is achieved.

The propulsion unit including a casing having an inner curved surface and an outer curved surface, at least one tire disposed within the casing within a duct defined by the inner curved surface and the outer curved surface, a first propeller and a second propeller having a plurality of blades extending from within the casing toward a center axis of the casing, and one or more motors housed within the casing, the one or motor being configured to operate the at least one tire, the first propeller, and the second propeller independently of one another. There is also provided a vehicle with one or more propulsion units of the present disclosure.

A steering system for a watercraft having twin propulsion units whose thrust axes are fixed to diverge outward from a longitudinal centerline in plan view. During a turn, a controller differentially commands thrust such that the outboard propulsion unit produces greater thrust than the inboard unit. The outward alignment of the thrust axes yields a net lateral force whose vertical offset from the craft's center of gravity produces a rolling moment that banks the hull inward toward the turn. The system enables banked turns without swiveling drives or rudders and supports zero-radius maneuvers at low speeds. Embodiments include electric propeller pods or water-jet nozzles, planing and hydrofoil craft, and optional feedback to regulate bank angle.

The propulsion unit including a casing having an inner curved surface and an outer curved surface, at least one tire disposed within the casing within a duct defined by the inner curved surface and the outer curved surface, a first propeller and a second propeller having a plurality of blades extending from within the casing toward a center axis of the casing, and one or more motors housed within the casing, the one or motor being configured to operate the at least one tire, the first propeller, and the second propeller independently of one another. There is also provided a vehicle with one or more propulsion units of the present disclosure.

The present invention relates to a pod drive device capable of improving cooling performance of a built-in motor. One embodiment includes a motor disposed within a pod and equipped with a stator and a rotor to provide a rotational force to a drive shaft. The stator includes: a stator core fixed within the pod and surrounding the drive shaft; a coil wound around the stator core; a plurality of stator channels through which a refrigerant flows, the channels being arranged in an axial direction of the stator core and extending in a circumferential direction inside the stator core; and a plurality of stator flow deflectors which extend in the radial direction and are arranged in each stator channel at a distance from each other in the circumferential direction of the stator. At least some of the plurality of stator deflectors may include bends formed by bending radially outer ends.

The present invention relates to a pod drive that can improve the cooling performance of a built-in motor. An embodiment comprises a motor that is disposed inside a pod and provided with a stator and a rotor in order to provide rotational force to a drive shaft. The stator includes: a stator core that is fixed inside the pod and surrounds the drive shaft; a coil that is wound around the stator core; a plurality of stator channels through which a refrigerant flows and which are arranged along the axial direction of the stator core and extend in a circumferential direction inside the stator core; and a plurality of stator guides which extend radially and are arranged, spaced a certain distance from each other along the circumferential direction of the stator, in each of the stator channels. At least some of the plurality of stator guides may include a curved portion formed by curving radial outer ends.

A marine propulsion device (100) includes a controller (70) configured or programmed to calculate a rotation speed (TN) of a rotor (54) based on a magnetic flux density (MD) detected by a detector (60), and correct a deviation in a calculated magnet position (MP) of the rotor (54) due to an eddy current generated in a metal member (MM) based on a calculated rotation speed (TN) of the rotor (54).