JPH02136799U

JPH02136799U -

Info

Publication number: JPH02136799U
Application number: JP4666989U
Authority: JP
Priority date: 1989-04-20
Filing date: 1989-04-20
Publication date: 1990-11-14

Description

[Brief explanation of drawings]

第１〜４図は本考案の第１実施例としての船用
タンデム型リアクシヨンフインを示すもので、第
１図は船尾部附近の左舷側からみた側面図、第２
図は船尾部附近の右舷側からみた側面図、第３図
は第１図の−矢視断面図、第４図は第１図の
−矢視断面図であり、第５〜７図は本考案の
第２実施例としての船用タンデム型リアクシヨン
フインを示すもので、第５図は船尾部附近の左舷
側からみた側面図、第６図は船尾部附近の右舷側
からみた側面図、第７図は第５図の−矢視断
面図であり、第８図は従来の船用タンダムリアク
シヨンフインを示すもので、船尾部附近の右舷側
からみた側面図である。第９〜１１図は水槽試験
の結果を示すグラフで、第９図は推進効率比（縦
軸）と前方フインの突出長さ（横軸）との関係を
示すグラフ、第１０図はプロペラ面の位置におけ
る上昇流の変化量（縦軸）とプロペラ軸からの距
離（横軸）との関係を示すグラフ、第１１図は抵
抗比（縦軸）と前方フインの突出長さ（横軸）と
の関係を示すグラフである。１……船尾部、２……スタンフレーム、３……
ボス、４……スクリユープロペラ、５……舵、６
……船体、７ａ〜７ｆ……後方フイン、８ａ〜８
ｆ……前方フイン、９……プロペラ軸。 Figures 1 to 4 show a tandem-type reaction fin for ships as the first embodiment of the present invention.
The figure is a side view of the vicinity of the stern seen from the starboard side, Figure 3 is a sectional view taken along the - arrow in Figure 1, Figure 4 is a sectional view taken in the - arrow direction of Figure 1, and Figures 5 to 7 are a side view taken from the starboard side of the ship. This figure shows a tandem-type reaction fin for a ship as a second embodiment of the invention. Fig. 5 is a side view of the stern as seen from the port side, Fig. 6 is a side view of the stern as seen from the starboard side, and Fig. 6 is a side view of the stern as seen from the starboard side. FIG. 7 is a sectional view taken along the - arrow in FIG. 5, and FIG. 8 is a side view of a conventional tandem reaction fin for ships, as seen from the starboard side near the stern. Figures 9 to 11 are graphs showing the results of water tank tests, Figure 9 is a graph showing the relationship between the propulsion efficiency ratio (vertical axis) and the protrusion length of the front fin (horizontal axis), and Figure 10 is the propeller surface. A graph showing the relationship between the amount of change in the upward flow (vertical axis) and the distance from the propeller axis (horizontal axis) at the position of Figure 11 shows the resistance ratio (vertical axis) and the protruding length of the front fin (horizontal axis) It is a graph showing the relationship between 1... Stern section, 2... Stun frame, 3...
Boss, 4...screw propeller, 5...rudder, 6
... Hull, 7a-7f ... Rear fin, 8a-8
f...Front fin, 9...Propeller shaft.

Claims

[Scope of utility model registration request]

A plurality of rear fins projecting radially from a boss in front of a screw propeller provided at the stern of the hull are arranged so as to bend the flow of water in a direction opposite to the rotating direction of the screw propeller. In addition, in a single-shaft fattened ship equipped with a plurality of front fins that protrude radially from the hull ahead of the rear fins, the propeller blades of the propeller move downward when the screw propeller rotates forward. The amount of protrusion of the front fin is
A tandem-type reaction fin for a ship, characterized in that the amount of protrusion is set to be smaller than the amount of protrusion of the front fin on the side where the propeller blade rises.