| 摘要 |
A motor drives both a scrubbing brush and a propeller. Both rotate usually on the same shaft. The brush rotates against a surface to be cleaned and the propeller provides a thrust of the brush towards the surface. There is ample motion for scrubbing and cleaning combined with force to hold the brush firmly against the surface. A mechanically generated force against the surface is needed to remove debris, and when working underwater, such as against a boat hull, it is difficult to provide the force, since there is no ground on which to stand. The motor is electrical, or is pneumatic or hydraulic, with power brought in via flexible tubes, or power may come via flexible shaft. Manual controls may be underwater mounted on the unit or may transmit commands by electrical or radio signals to the above water power source.
|
