JPS63116994A - Underwater tractor propeller for ship - Google Patents

Abstract

PURPOSE:To raise the propellent speed of a ship as well as to aim at the promotion of efficiency, by setting up an underwater tractor propeller, pulling and propelling the ship, in a nose lower end of the bow, in addition to the screw propeller installed in a ship's bottom of the stern. CONSTITUTION:A screw propeller 2 for ship propulsion to be driven and rotated by a stern part main engine 5 is attached to the stern part. On the other hand, also in the vow, there is provided with an underwater tractor propeller 1, to be driven and rotated by a stem part main engine 4, at a nose lower part of the vow. As maintenance service for this underwater propeller 1, there is additionally provided with propeller protective equipment 12 in the front, and also there is provided with a side thruster 6 in addition for change direction. Therefore, since the underwater tractor propeller 1 is combinedly installed in this ship, a drop in propulsive efficiency is avoided even if it sails at high speed, thus its propellent speed is improvable.

Description

【発明の詳細な説明】 従来の船舶のスクリュープロペラは船尾の船底部にあっ
てスクリューの廻転により水を後方に推す反動で船舶は
前方へ進むのであるが、船体の航跡は船舶が急流を遡る
が如き形態となり推進する距離、即ちピッチが小さくな
り、伺スクリュープロペラは高速になるとキャビテーシ
ョン、空洞現象が生じ、推進効率が著しく低下する。[Detailed Description of the Invention] The screw propeller of a conventional ship is located at the bottom of the ship at the stern, and the reaction force of the rotation of the screw pushes the water backwards, which causes the ship to move forward, but the wake of the ship's hull causes the ship to go back up the rapids. When the propeller becomes high-speed, cavitation occurs and the propulsion efficiency decreases significantly.

然るに水中牽引プロペラの場合は、船舶が急流を下るが
如き状態となりピッチを上ぐることが出来るので、牽引
水中プロペラ使用の船舶はスクリューグルベラ使用の船
舶より推進速度が速く経済的で効果は偉人である。However, in the case of underwater towing propellers, the ship is in a state similar to going down rapids and can ascend the pitch, so ships using underwater towing propellers have faster propulsion speed and are more economical than ships using screw grubbers, and the effect is great. It is.

空中プロペラ推進の船舶もあるが、水面を浮上して航走
するエアクッション船ではスクリュープロペラを使用す
ることが出来ないので、空中プロペラを使用している。Some ships are propelled by aerial propellers, but air cushion ships that float on the surface of the water cannot use screw propellers, so they use aerial propellers.

又水深が浅いところや浮遊物の多い水域では、水中プロ
ペラを使用することができぬので空中プロペラを使用し
ている。Also, in areas where the water is shallow or where there are many floating objects, underwater propellers cannot be used, so aerial propellers are used.

同一船舶にスクリュープロペラとこの水中牽引プロペラ
とを併用すれば、スクリュープロペラだけの船舶より２
倍以上の推進力が出るものと推定され、経済的に大変有
利なものとなる。If you use both a screw propeller and this underwater traction propeller on the same vessel, it will be 2 times more efficient than a vessel with only a screw propeller.
It is estimated that the propulsive force will be more than twice that, making it very economically advantageous.

水中牽引プロペラを併用する場合はその船舶が高速とな
るので卒ヤビテーション空洞現象を避けるためスクリュ
ープロペラの設置場所や個数を考慮する必要があり、又
低速船等を避くる非常の場合を考慮して方向転換用とし
てサイド・スラスタ−を設置する必要がある。When using underwater towing propellers, the vessel will be at high speed, so it is necessary to consider the installation location and number of screw propellers to avoid the cavitation phenomenon, and also to take into consideration emergency situations to avoid slow-speed vessels, etc. It is necessary to install side thrusters for direction change.

閘プロペラの保全処置としてプロペラの前面に適当な防
護設備を設ける。Appropriate protective equipment will be installed in front of the propeller as a maintenance measure for the lock propeller.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は推進装置の側面図、第２図は推進装置の平面図
である。 図面の１は水中牽引プロペラ、２はスクリュープロペラ
、３は舵、４は船首部主機、５は船尾部主機、６はサイ
ド・スラスタ−１７は船体、８は船底、９は船首、１０
は船尾、１１は吃水線、１２は水中牽引プロペラ防護設
備である。 纂２（」FIG. 1 is a side view of the propulsion device, and FIG. 2 is a plan view of the propulsion device. In the drawing, 1 is an underwater towing propeller, 2 is a screw propeller, 3 is a rudder, 4 is a bow main engine, 5 is a stern main engine, 6 is a side thruster, 17 is a hull, 8 is a bottom, 9 is a bow, 10
is the stern, 11 is the waterline, and 12 is the underwater towing propeller protection equipment.纂2(''

Claims (1)

【特許請求の範囲】[Claims] 船舶の推進用としてスクリュー、プロペラ（２）が使用
されているが、高速になると効率が悪くなるため、航空
機のプロペラが機首にあつて航空機を牽引するが如く、
船首の先端下部に水中牽引プロペラ（１）を設置して船
舶を牽引推進するを特徴とする船舶水中牽引プロペラの
構成。Screws and propellers (2) are used to propel ships, but they become less efficient at higher speeds, so they are used like an aircraft propeller at the nose to pull an aircraft.
A structure of an underwater towing propeller for a ship, characterized in that an underwater towing propeller (1) is installed at the lower end of the bow of the ship to tow and propel the ship.