A stern energy-saving device applied to water-jet propulsion high-speed ships

Abstract

The invention provides a stern energy-saving device applied to a water-spraying propelling high-speed ship. The stern energy-saving device comprises a plurality of intercepter plates which are arranged on the side, close to a nozzle of a water-spraying propeller, of the lower end of a stern transom plate. Lifting lugs are fixed to the two sides of the other side face, opposite to the stern transomplate, on each intercepter plate correspondingly, and a horizontal sliding groove is formed in each lifting lug. The two sides of each intercepter plate are each provided with a positioning plate, and a wave suppression plate is arranged on each positioning plate. Side edge end plates are fixed to the two sides of each wave suppression plate correspondingly, and an output part of each driving device is connected with one end of a wave suppression plate supporting rod. The other end of each wave suppression plate supporting rod is hinged to the middle of the corresponding wave suppression plate. A plurality of first positioning pins are arranged in the multiple horizontal sliding grooves, and one end of each first positioning pin is fixedly connected with the corresponding wave suppressionplate supporting rod. According to the different navigational speed working conditions of the high-speed ship, downward-pressing angles of the stern wave suppression plates and downward-stretching depths of the intercepter plates are simultaneously adjusted, the optimal resistance performance can be achieved at each navigational speed, and the optimal comprehensive resistance-reducing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of ship hydrodynamic energy-saving device design, in particular to a stern energy-saving device. Background technique [0002] The stern breaker, stern wedge and cut-off plate are three energy-saving devices commonly used on high-speed boats. All of them have the effect of adjusting the trim angle and reducing the resistance of the ship at high speed. Among them, the breaker is equivalent to increasing the length of the bottom of the ship. , it can also increase the longitudinal stability of the ship when sailing at high speed and avoid the effect of "dolphin movement". In order to obtain the maximum drag reduction effect, conventional high-speed ships usually install full-width wave breakers, wedge plates or interceptors at the tail, and usually only one of them is used. For high-speed ships using water jet propulsion, water jet nozzles and reversing buckets are arranged outside the stern seal. If the wav...

AI Technical Summary

Problems solved by technology

If the wave suppressor is used, in order to avoid interfering with the reversing water flow of the reversing bucket, it can only be installed within a limited width, and the drag reduction effect is limited; if a wedge-shaped plate is used, although it can be arranged within the full width of the stern, because the angle is fixed and cannot be adjusted, It is impossible to obtain the best drag reduction effect at different speeds, and it also leads to increased resistance at low speeds and when reversing; if a cutoff plate is used, although it can also be arranged within the full width of the stern, it can also be vertically movable within the full width. Adjustment, but when the height of the stretch is not right, it is prone to lateral and longitudinal instability during navigation

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