摘要:
A pool cleaning device is provided, including: a main body; a rotating unit rotatably disposed on the main body, the rotating unit including a rotating member, a fluid outlet extending radially outward from the rotating member, and a first positioning protrusion extending radially outward from the rotating member and spaced apart from the fluid outlet; and a reversing member including a plurality of stoppers spaced apart from each other and disposed along a path of rotation of the rotating member. Each of the plurality of stoppers is reciprocable between a position in a path of rotation of the first positioning protrusion and a position out of the path of rotation of the first positioning protrusion.
摘要:
A propulsion system for an aquatic vessel is provided. The propulsion system includes a plurality of Magnus-type rotors and a drive arrangement for rotating the plurality of Magnus-type rotors. The plurality of Magnus-type rotors are operable to rotate about corresponding substantially upright axes. The propulsion system also includes a control arrangement for receiving one or more measured apparent wind speeds and for controlling the drive arrangement to vary rates of rotations of the plurality of Magnus-type rotors. The rates of rotations may, for example, be varied as functions of the measured apparent wind speeds and a direction of travel of the aquatic vessel. Moreover, the control arrangement includes a user-operable control for adjusting propulsion provided by the plurality of Magnus-type rotors. The control arrangement is operable to control the drive arrangement to vary a drive applied to rotate one or more Magnus-type rotors from the plurality of Magnus-type rotors.
摘要:
Improvements in hydrokinetic floating power plant efficiency are obtained by optimization of (1) gaps z and z′ between the hydrokinetic driving engine blades and internal sidewalls and floor of the working channel of the driving engine; (2) the ratio of the submerged part of blade height in liquid and part of blade height above the liquid surface; (3) the angles of inlet side planes and bottom planes of a confusor and the outlet side planes of the diffusor; and (4) distance t between blades and number n simultaneously submerged blades in the working channel of the driving engine.
摘要:
A motorized inflatable raft includes independently controllable propellers to propel the raft. The propellers are part of a propeller control assembly that includes a power source and a joystick for control. Direction of motion is controlled by rotating independent propeller control assemblies using a joystick controller. Power is supplied by batteries in a battery housing, and application of power to the propellers is controlled by the joystick. Assembly is simplified using an easily screwed screw cap that securely fastens a battery housing that is connected through tubing to the propeller to the joystick controller.
摘要:
A multi-stage watertight chamber is provided in this invention. The multi-stage watertight chamber comprises a first rotary seal, a second rotary seal, a first housing, a second housing, and an integrated shaft. The first and second rotary seals withstand external pressure to make sure watertight status is achieved when the integrated shaft rotates. The first housing forms a first watertight chamber. The integrated shaft protrudes through the first housing via the first rotary seal. The second housing is placed outside and adjacent to the first housing and forms a second watertight chamber. The first watertight chamber contains devices that must be isolated from liquid outside the first and second housings. The second watertight chamber is used to store water seeped through the second rotary seal and avoid causing damage directly to components and apparatus inside the first watertight chamber.
摘要:
A mobile marine barrier (1) comprising a base (2) and a hood (8) located at a distal end thereof is described. The hood (6) comprises a funnel (15) and a distal surface (18) located therein which allows the hood (6) to morph its shape, size and strength so as to give adaptable coastal protection against naturally occurring events. This is achieved by incorporating a telescopic funnel such that the length of the hood (6) and thus the area of its open end can be altered so as to vary the quantity of water directed towards the distal surface (18). The hood (16) may also comprise a mobile face (17) that forms part of variable volume chamber (26) located within the hood (8) which can be filled and emptied with fluids.
摘要:
A jet-propelled watercraft can include an engine output control system that adjusts the output of the engine based on a steering force and the engine speed. The control system can also be configured to detect abnormalities in the steering force sensor and to prohibit the increase engine output control when an abnormality is detected.
摘要:
A system and method for synchronizing a frequency of plurality of variable frequency generators with a variable frequency load over a variable frequency bus independent of a frequency conversion stage. A synchronization controller is configured to determine an optimal bus frequency of the variable frequency bus based on at least one power demand requirement of the variable frequency load operatively connected to the variable frequency bus. With the optimal frequency, an available power range supplied by the plurality of variable frequency gensets at the optimal bus frequency can be determined. The synchronization controller then asymmetrically loads the variable frequency load to the plurality variable frequency gensets at the optimal bus frequency based on the operating range of each variable frequency genset and recursively updates the optimal bus frequency based on operational statistics of the asymmetrically loaded variable frequency gensets.
摘要:
An electromotive drive device for a floatable device includes an electric motor operable by means of a separate power supply module with an energy accumulator, an electronic open-loop/closed-loop control unit and a remote control. The electric motor is within a housing connected to a drive propeller, which at least partially is surrounded by a protective device connected to the housing via connecting supports. The housing has an upper housing part and a lower housing part connected to each other by at least one releasable connection. The housing includes an elliptical bow, the end thereof transitioning into an essentially circular diameter with relative dimensions being a sum larger than an end of the housing with a projection opposite the bow. The housing in the lateral area behind the diameter is provided with intake openings for cooling water to flow inward. The cooling water can exit via outlet openings provided in the connecting supports. An operating method for the drive device includes an electronic open-loop/closed-loop control unit with an information processing unit. The drive ensures energetic use of the power supply module by reducing power while considering a travelled distance or travel time of the floatable device.
摘要:
The present disclosure relates to a ship's propulsion unit such as a ship's azimuthing propulsion unit. The propulsion unit can include at least one supporting metal sheet arranged between an support section of a shell structure of the propulsion unit and an cylindrical outer surface of a cylindrical section of a motor housing section of the shell structure for providing additional support for the motor housing section of the shell structure at the shell structure of the support section.