JPS5836999U

JPS5836999U - Separate duct propeller

Info

Publication number: JPS5836999U
Application number: JP13234881U
Authority: JP
Inventors: 洋岡本; 野沢　和男
Original assignee: 川崎重工業株式会社
Priority date: 1981-09-04
Filing date: 1981-09-04
Publication date: 1983-03-10

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はスクリュー・プロペラ直径ノ約５０％の長さを
有するダクトの長さ方向のほぼ中央に該、プロペラが位
置せしめである公知の通常型ダクト・プロペラ、第２図
はダクトの出口後端縁をスクリュー・プロペラの翼先端
附近に、そして該ダクトの入口前端縁を該船舶の船尾骨
材附近にそれぞれ位置せしめるとともに、該ダクトの長
さを該ダクトの出口後端縁の内径より僅かに小さくされ
た該プロペラの直径の２０％〜３０％の範囲内にあるよ
うにしたことを特徴とするショート・ダクト・プロペラ
゛を、それぞれ例示した側面図、第３図〜第５図は本願
考案のそれぞれ異なる３種類の実施例を示す船尾部附近
の側面図である。０１．１・・・・・・船体船尾部、０２，０２Ａ・・・
・・・ダクト、２Ａ・・・・・・後方ダクト、２Ｂ、　
　２Ｃ，２Ｄ・・・・・・前方ダクト、０３，３・・・
・・・スクリュー・プロペラ、０４．４・・・・・・舵
、６・・・・・・後方ダクト２Ａの入口前端縁５Ａの上
端と前方ダク）２Ｂ、２Ｃ，２Ｄそれぞれの出口後端縁
５Ｂ、５Ｃ，５Ｄの各上端との船体長さ方向における間
隔、７・・・・・・コントラ・フィン、Ｄｐ・・・・・
・プロペラ３の直径。　、隼　ｚｅFigure 1 shows a known conventional duct propeller in which the propeller is located approximately in the longitudinal center of a duct having a length of about 50% of the diameter of the screw propeller, and Figure 2 shows it after the exit of the duct. The end edge of the duct is located near the blade tip of the screw propeller, and the front end edge of the duct's inlet is located near the stern frame of the ship, and the length of the duct is slightly longer than the inner diameter of the rear end edge of the duct's outlet. Figures 3 to 5 are side views illustrating a short duct propeller characterized in that the diameter of the propeller is within a range of 20% to 30% of the diameter of the propeller. FIG. 3 is a side view of the vicinity of the stern section showing three different embodiments of the invention. 01.1...Hull stern, 02,02A...
... Duct, 2A ... Rear duct, 2B,
2C, 2D... Front duct, 03, 3...
...Screw propeller, 04.4...Rudder, 6...The upper end of the front edge of the inlet of the rear duct 2A 5A and the rear edge of the outlet of each of the front ducts) 2B, 2C, and 2D Distance in the hull length direction from each upper end of 5B, 5C, 5D, 7... Contra fin, Dp...
- Diameter of propeller 3. , Hayabusa ze

Claims

[Scope of utility model registration request]

(1) Separately arranged in front and behind the screw propeller on the same or almost the same axis,
Two cylindrical ducts, both of which have an appropriate vertical section and have an airfoil-like shape, and the screw φ
A duct propeller combined with a propeller, wherein the trailing edge of the outlet of the front duct is on the upstream side close to the tip of the blade of the propeller, and the front edge of the inlet of the rear duct is close to the tip of the blade of the propeller. A separate type duct propeller characterized in that the propeller is configured to be positioned downstream adjacent to the propeller.

(2) The distance in the hull length direction between the upper end of the rear edge of the outlet of the forward duct and the upper end of the front edge of the inlet of the rear duct is set to a length corresponding to 3% to 20% of the diameter of the screw propeller. A separate type duct propeller according to claim 1 of the utility model registration claim, characterized in that:

(3) The diameter at the front edge of the entrance of the rear duct is approximately the same as or larger than the diameter at the rear edge of the outlet of the front duct, or Separate duct propeller according to item 2.

(4) Registration of a utility model characterized in that the front duct is inclined with respect to the axis of the rear duct so that the axis of the front duct is substantially in the same direction as the stern flow along the hull surface. A separate duct propeller according to claim 1, 2 or 3.