POD TYPE PROPELLER

To provide a pod type propeller capable of improving propulsion efficiency, without requiring an inverter, with high conversion efficiency for energy, and reducing swirling flow generated in front and back of the propeller and ineffective water flow, etc., generated in the circumferential direction....

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Bibliographic Details
Main Authors MATSUMURA MITSUNORI, OGAWARA TAKASHI
Format Patent
LanguageEnglish
Japanese
Published 14.07.2023
Subjects
MARINE PROPULSION OR STEERING
PERFORMING OPERATIONS
RELATED EQUIPMENT
SHIPS OR OTHER WATERBORNE VESSELS
TRANSPORTING
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Summary:To provide a pod type propeller capable of improving propulsion efficiency, without requiring an inverter, with high conversion efficiency for energy, and reducing swirling flow generated in front and back of the propeller and ineffective water flow, etc., generated in the circumferential direction.SOLUTION: A pod type propeller for propelling a vessel by rotating a propeller 20 by an electric motor for propulsion 8 in a pod 1 includes: a synchronizing differential transmitter 6 for varying a blade pitch angle by an electric motor for varying blade pitch 5 coupled to a rotational shaft of the propeller 20; a duct 19 arranged on an outer periphery of the propeller 20; and a duct front unit straightening plate 18 for straightening water flowing into the duct 19 to a flow going along a blade pitch angle of the propeller 20, arranged forward of the propeller 20 in the duct 19.SELECTED DRAWING: Figure 1 【課題】インバータなどが不要で、エネルギーの変換効率も高く、プロペラの前後で発生する旋回流や円周方向で発生する無効水流等を低減して、推進効率の向上が図れるポッド型推進装置を提供する。【解決手段】ポッド１内の推進用電動モータ８によりプロペラ２０を回転させて船舶を推進させるポッド型推進装置において、プロペラ２０の回転軸に連結された羽根ピッチ可変用電動モータ５により、羽根ピッチ角を変更するための同期差動変速機６と、プロペラ２０の外周に配されたダクト１９とを有し、ダクト１９内のプロペラ２０より前方に、ダクト１９に流れ込んだ水をプロペラ２０の羽根ピッチ角に沿った流れに整流するダクト前部整流板１８を配した。【選択図】図１
Bibliography:Application Number: JP20220000141