An unmanned undersea vehicle including a magnetic coupler drive. The magnetic coupler drive is incorporated into a hull section, such as a tail section of the unmanned undersea vehicle. The magnetic coupler drive includes a motor shaft magnet, a titanium housing disposed about the motor shaft magnet, and a propeller shaft magnet magnetically coupled to the motor shaft magnet, but physically separated from the propeller shaft magnet by the titanium housing.

A drone for triggering naval mines, which drone includes a drive having an electric motor for locomotion in the water, wherein the electric motor can be used additionally to trigger the naval mines during operation of the drone, by an external magnetic field formed by the operation of the electric motor. The electric motor includes a stationary stator and a rotor, which is mounted for rotation relative to the stator. The stator includes at least one magnetic and/or electromagnetic element for forming an excitation field. The rotor includes at least one armature winding, which electromagnetically interacts with the excitation field during operation of the electric motor, whereby a superordinate magnetic field is formed. The external magnetic field formed outside of the electric motor during operation is in the form of a constant magnetic field.

An underwater liquid supply unit includes a first bladder containing a first liquid, a second bladder containing a second liquid, and a third bladder containing a third liquid. The combined volume of the first liquid, second liquid, and third liquid is neutrally buoyant relative to a surrounding medium the liquid supply unit is disposed in (e.g., in seawater). As the first liquid, second liquid, and third liquid are dispensed from the bladders, the bladders may reduce in size in at least one dimension. As the liquids are dispensed, the liquids may be dispensed in a predetermined volumetric ratio based on the density of the liquids to maintain neutral buoyancy of the combined volume of liquid. The underwater liquid supply unit may also include an integrated generator such as a fuel cell, as well as a propeller.

The present disclosure discloses a horizontal-axis ocean current power generation device for an underwater vehicle. The power generation device is disposed in a groove of a rotary body of the underwater vehicle, and includes an undercarriage unit, a yawing unit, and a power generation unit. The undercarriage unit can realize elevation and descent of the entire power generation device, and the power generation unit is capable of realizing arbitrary rotation within 360° in a horizontal plane through the yawing unit. The power generation device can actively yaw based on change of an ocean current direction to perform an incident flowing function. The power generation unit respectively drives an outer shaft and an inner shaft to rotate through a front blade and a rear blade that rotate in opposite directions, so as to drive inner and outer rotors of a motor, thereby cutting magnetic induction to generate electric power.

An omnidirectional underwater vehicle includes an open-frame mechanism including a frame with top thrusters at four corners of a top end of the frame; mechanical arms disposed at a front end of the frame; and a rotary holder disposed in the frame and including a motor fixing plate, an upper bearing fixing plate and a lower bearing fixing plate. A cylindrical roller bearing is fixed between the upper bearing fixing plate and the lower bearing fixing plate, and an inner edge of the cylindrical roller bearing is provided with two bearing clip inner plates from top to bottom. A servo motor is fixed on the motor fixing plate, a bottom end of the bearing clip inner plate at the bottom is fixedly connected to a steering gear fixing plate, and a top end of the steering gear fixing plate is provided with fully waterproof steering gears installed with underwater thrusters.

Disclosed are a flexibly-driven small underwater robot and a driving method thereof. The underwater robot provided by the invention comprises a driving module and a propelling module. Two propelling modules are designed at head and tail portions, and the driving module is arranged between the two propelling modules. A rib plate in the driving module comprises a carbon fiber plate matrix and a piezoelectric fiber sheet; and a shape of the carbon fiber plate matrix is optimized by width change and hole digging. The propelling modules comprise a head propelling module and a tail propelling module, and the head propelling module and the tail propelling module are both propelled through a one-way valve. According to the invention, two modes of the pre-compression rib plate are adjusted through the piezoelectric fiber sheet, so that a volume of an internal cavity is changed, and jet propelling is carried out.

An underwater vehicle includes a modular battery system. The modular battery system includes at least one removable battery tray. The modular battery system further includes a battery tray system configured to hold at least one removable battery tray. The modular battery system further includes a controller coupled to the at least one removable battery tray that is configured to detect the battery chemistry of the at least one removable battery tray.

A deep-ocean polymetallic nodule collector is an apparatus that is used to harvest polymetallic nodules and other natural resources from the ocean floor. To do so, the apparatus includes a support frame and a collection mechanism. The support frame is a durable structure designed to withstand the harsh deep-ocean conditions. The support frame keeps the collection mechanism adjacent to the ocean floor for the mining of polymetallic nodules without damage to the underwater ecosystem. In addition, the support frame allows for attachment of mining support vehicles that support the operation of the apparatus. The mining support vehicles can include, but are not limited to, cabled vehicles which are connected to the surface for power, monitoring, and control, wireless submersible vehicles, or ocean-bottom based vehicles that can operate autonomously, semi-autonomously, or by remote control. The collection mechanism enables the collection of polymetallic nodules while minimizing the damage to the underwater ecosystem.

System of unmanned underwater vehicles with multiple variable-geometry internally pressurized flexible hulls (that enable the underwater vehicle to submerge/emerge and change submersion depth by varying hull's buoyancy and not the vehicle weight) and possibly at least one pressure hull housing e.g. accumulators and electronic steering system. Each flexible hull is composed of a number of flexible hull segments modules.

The present disclosure discloses a wingless hydraulic extrusion spiral rotation and forward movement type intelligent unmanned underwater vehicle, including a cabin body and a control module. The cabin body includes a power reaction cabin and a power fuel storage cabin, a power reaction cabin water supply device is fixedly arranged on the cabin body. The power reaction cabin and the power fuel storage cabin are separated by a partition plate. Power fuel in the power fuel storage cabin may enter the power reaction cabin. A tail part of the power reaction cabin is provided with a jet forward propeller. The control module is fixed on the cabin body. At least two jet rotation propellers are arranged on the cabin body. The jet rotation propeller includes a main propelling pipe, an auxiliary propelling pipe, and a jet magnification ring. The jet magnification ring includes an outer ring and an inner ring.