JPH0971296A - Water jet propulsion machine - Google Patents
Water jet propulsion machineInfo
- Publication number
- JPH0971296A JPH0971296A JP26196195A JP26196195A JPH0971296A JP H0971296 A JPH0971296 A JP H0971296A JP 26196195 A JP26196195 A JP 26196195A JP 26196195 A JP26196195 A JP 26196195A JP H0971296 A JPH0971296 A JP H0971296A
- Authority
- JP
- Japan
- Prior art keywords
- water
- spiral
- spiral element
- movable
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，液体に圧力または運動
エネルギーを与える水力機械としての容積式液体ポンプ
に係わり，特に水面及び水中で水力を利用して船舶を推
進する水ジェット推進機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positive displacement liquid pump as a hydraulic machine for applying pressure or kinetic energy to a liquid, and more particularly to a water jet propulsion machine for propelling a ship by utilizing hydraulic power on the water surface and in water.
【０００２】[0002]
【従来の技術】従来，船舶の推進機としてはプロペラを
用いた推進機が最も一般的であった。大半の船舶が船尾
下部の船外に露出させて設けたプロペラを回転させて推
進していた。その他の従来例として，船底と船尾外面に
連通させて開口するダクトを設け，そのダクト内に設け
たプロペラで水を後方に噴出させて推進する水ジェット
推進機があった。プロペラを船外に設けた推進機の公知
例として，特公平５−２１７９８や特公平５−２３２３
８などが挙げられる。これらの公知例が示すように，船
体後部に設けた船外機に露出させたプロペラをエンジン
等を駆動源として軸を介して水中で回転させ，プロペラ
から得られる推進力により船を推進していた。船の進路
変更は方向舵またレバーにより船外機を回転させてプロ
ペラの向きを直接変更して行なわれていた。次にプロペ
ラをダクト内に設けた水ジェット推進機の公知例とし
て，特公平１−５０６３９や特開平４−５５１９２など
が挙げられる。これらの公知例が示すように，船底と船
尾に開口した太くて長いダクトが船内後部に設けられ，
そのダクト内に噴流を発生させるプロペラとその流れを
整流するための固定翼が設置され，そしてダクト出口近
傍には船の進路方向を操作する舵機が設けられている。
そして，船底のダクト開口部から水を導入し，プロペラ
を通過した後船尾の開口部から水を噴出して船を推進し
ていた。進路変更は噴流の出口に設けたノズルの方向を
変えるかノズル部のカバー等を回転させて噴流の方向を
変更して行っていた。2. Description of the Related Art Conventionally, propellers using propellers have been the most common propellers for ships. Most ships were propelled by rotating propellers that were exposed outside the lower part of the stern. As another conventional example, there has been a water jet propulsion machine in which a duct that communicates with the bottom of the ship and the outer surface of the stern is provided, and a propeller provided in the duct ejects water backward to propel the water. As a known example of a propulsion machine having a propeller installed outside the ship, Japanese Patent Publication No. 5-21798 and Japanese Patent Publication No. 5-2323
8 and the like. As shown in these known examples, a propeller exposed to the outboard motor at the rear of the hull is rotated in water through an axis using an engine as a drive source, and the propeller propels the ship. It was The course of the ship was changed by rotating the outboard motor with a rudder or lever to directly change the direction of the propeller. Next, as a known example of a water jet propulsion machine in which a propeller is provided in a duct, Japanese Patent Publication No. 1-50639 and Japanese Patent Laid-Open No. 4-55192 can be cited. As these known examples show, a thick and long duct that opens at the bottom and stern of the ship is installed at the rear of the ship,
Inside the duct, a propeller for generating a jet flow and fixed vanes for rectifying the flow are installed, and near the exit of the duct, a steering wheel for operating the course of the ship is installed.
Then, water was introduced from the duct opening at the bottom of the ship, and after passing through the propeller, water was ejected from the opening at the stern to propel the ship. The direction of the jet is changed by changing the direction of the nozzle provided at the outlet of the jet or by rotating the nozzle cover or the like to change the direction of the jet.
【０００３】[0003]
【発明が解決しようとする課題】プロペラを船尾の船外
で水中に露出させて取り付け推進する装置の場合，付近
に浮遊している物体又は水の底にある物体が回転してい
るプロペラに接触して，その物体を破損させるか，プロ
ペラが破損して航行不能となることがあった。その物体
が人間のような生物の場合，その生物がプロペラの先端
に接触もしくは巻き込まれて大怪我ないしは死亡するこ
ともあり，極めて危険性が高い推進機であった。一方プ
ロペラをダクト内に設け，水を導入して噴流を発生させ
て推進する水ジェット推進機の場合には，プロペラや整
流用の固定翼などを収納し水を導入するための太くて長
いダクトが水中に必要となる。この場合危険なプロペラ
が露出しない替わりに多くの設置スペースが必要となる
とともに設置の自由度が大幅に制約されまた水の抵抗が
増大していた。プロペラを用いた推進機共通の課題とし
て，速度が最も早くなるプロペラ外周でのキャビテーシ
ョン発生による推進効率の大幅な低下や騒音振動の増大
などの問題もあり，高速化が大幅に制約されていた。ま
た，プロペラ式の軸トルクは回転数の２乗に比例して増
加するので，高速時駆動源に大きな負担を強いることに
なり電動機駆動を困難にしていた。このため大半がエン
ジン駆動であり，排気ガスによる大気汚染や大きな騒音
が問題となっていた。さらに，プロペラ式では公知例に
記載されているように，水中でのプロペラ単独の損失，
プロペラと船体間での流れの干渉に伴う損失など多くの
損失があり推進効率が低下する問題や船体設計の自由度
が制約される問題等があった。本発明が解決しようとし
ている課題として，プロペラを外部に露出した危険な構
造，ダクトを水中に設けることによる船体内の有効スペ
ースの減少と設置自由度の大幅な制約及び水中での抵抗
やプロペラの回転に伴う損失やキャビテーション発生に
伴う推進効率低下や騒音振動の増大などがある。加え
て，排気ガスによる大気汚染や騒音の問題が解消できる
電動機の使用を容易するなどがある。In the case of a device for mounting and propelling a propeller exposed to water outside the stern, an object floating nearby or an object at the bottom of the water contacts the rotating propeller. Then, the object could be damaged, or the propeller might be damaged, making it incapable of navigation. If the object was a human-like organism, the organism could come into contact with or be caught in the tip of the propeller and cause serious injury or death, which was a very dangerous propulsion device. On the other hand, in the case of a water jet propulsion machine in which a propeller is installed in the duct and water is introduced to generate a jet flow for propelling, a thick and long duct for accommodating the propeller and fixed vanes for rectification and introducing water is used. Are needed underwater. In this case, instead of exposing the dangerous propeller, a large amount of installation space is required, and the degree of freedom in installation is greatly restricted, and the water resistance is increased. As problems common to propellers using propellers, there were problems such as a significant decrease in propulsion efficiency due to the occurrence of cavitation at the outer periphery of the propeller, which has the highest speed, and an increase in noise and vibration. Further, since the propeller shaft torque increases in proportion to the square of the number of revolutions, it imposes a heavy load on the drive source at high speed, making it difficult to drive the motor. For this reason, most of them are driven by the engine, and air pollution and loud noise due to exhaust gas pose problems. Further, in the propeller type, as described in a known example, the loss of the propeller alone in water,
There were many losses such as the loss due to the interference of the flow between the propeller and the hull, and there was a problem that the propulsion efficiency decreased and the degree of freedom of hull design was restricted. The problems to be solved by the present invention include a dangerous structure in which the propeller is exposed to the outside, a reduction in the effective space in the hull due to the installation of the duct in the water, a large restriction on the installation flexibility, and a resistance in the water and the propeller. There are loss due to rotation, reduction in propulsion efficiency due to cavitation, and increase in noise and vibration. In addition, it is easy to use an electric motor that can solve the problems of air pollution and noise caused by exhaust gas.
【０００４】[0004]
【課題を解決するための手段】上記従来例の課題を解決
するために船の推進機として水または海水の噴流による
ジェット推進力を利用した渦巻き式水ジェット推進機を
用いる。これは容積式ポンプを用いた推進機であり，回
転体を外部に露出させない密閉構造になっている。本発
明の水ジェット推進機の容積式ポンプ部は厚板に渦巻き
状溝を設けた固定渦巻き要素と端板に渦巻き状突起を設
けた可動渦巻き要素の互いの渦巻き形状部を噛み合わせ
てポンプ部を形成する渦巻き式を用いている。固定渦巻
き要素は推進機本体に固定され，可動渦巻き要素は軸の
回転に連動して公転運動する仕組みになっている。回転
体などの可動部分は装置本体に固定されたハウジング等
で被われて露出しておらず，ポンプ内に水を導く吸入口
と噴出口は固定渦巻き要素に直接設けて構成した水ジェ
ット推進機は水面上に設置され，前記吸入口に連通する
水を導く導水用ダクトが設けられ，水上に噴出口を開口
させて噴流の抵抗を大幅に減らすと同時に流体抵抗をも
大幅に低減した構造になっている。本発明は，このよう
に回転体が船外に露出しない密閉構造で大気中で水を噴
出させる容積式ポンプを用いた渦巻き式水ジェット推進
機を提供することを目的とする。In order to solve the above-mentioned problems of the conventional example, a swirl type water jet propulsion machine using a jet propulsion force by a jet of water or seawater is used as a propulsion machine of a ship. This is a propulsion machine that uses a positive displacement pump, and has a sealed structure that does not expose the rotating body to the outside. The positive displacement pump part of the water jet propulsion device of the present invention is a pump part in which a fixed spiral element having a spiral groove provided on a thick plate and a movable spiral element having a spiral projection provided on an end plate are engaged with each other. The spiral type is used to form. The fixed spiral element is fixed to the main body of the propulsion device, and the movable spiral element revolves around the rotation of the shaft. The water jet propulsion machine is constructed such that the movable parts such as the rotating body are not exposed by being covered by the housing etc. fixed to the device body, and the suction port and the jet port for guiding the water into the pump are directly provided on the fixed spiral element. Is installed on the surface of the water, and is equipped with a duct for guiding water that communicates with the suction port. The jet outlet is opened above the water to greatly reduce the jet resistance and at the same time reduce the fluid resistance. Has become. SUMMARY OF THE INVENTION It is an object of the present invention to provide a spiral water jet propulsion device using a positive displacement pump that ejects water in the atmosphere with a sealed structure in which the rotating body is not exposed outside the ship.
【０００５】[0005]
【作 用】本発明の渦巻き式水ジェット推進機のポンプ
部は前記の如く固定渦巻き要素に設けた渦巻き状溝に外
周から水を吸い込み可動渦巻き要素の渦巻き状突起との
間に封じ込めて回転させ，強制的に中央へと移動させて
固定渦巻き要素のほぼ中央に設けた噴出口から大気中に
噴出させ，その噴流のジェット推進力により船舶を推進
させる。この水の噴流エネルギーの減少は水中に比べて
大気中では遥かに少ないので，その推進力を十分に利用
することができる。また，水中には水を吸い上げる導水
用ダクトの入口部分があるのみであり，水の抵抗が大幅
に減少して高い推進効率が得られる。回転体である可動
渦巻き要素の旋回速度はどの場所でも同じで，その速度
は自転軸中心に対する旋回軸中心の偏心量に軸回転数を
掛けて求められる。その大きさは自転するプロペラ先端
の速度に比べると極めて小さい。従って，高速回転時で
も摺動摩擦損失は大きくはならない。駆動軸のトルクは
噴流の速度や摺動部損失により多少変動するが，ポンプ
内の２ケ所できる最大密閉空間の大きさにほぼ比例する
ので，軸回転数が増大しても軸トルクが大きく増すこと
はない。よって，プロペラ式の軸トルクが軸回転数の２
乗に比例して急激に増加するのに比べて渦巻き式の場合
ほとんど変化しない。このように渦巻き式のトルクは電
動機のトルクに近い特性を示すので電動機駆動が容易と
なる。エンジン駆動の場合にはエンジンの小型化が図れ
る。また，駆動軸や可動渦巻き要素等の可動部分は全て
大気中にある推進機本体内に収納されており，水中の浮
遊物が回転部等に直接触れることはない。船舶を停止ま
たは後進する場合には推進機本体に格納していた逆走用
ダクトを噴出口に設置した後駆動軸の回転方向を逆転さ
せて，噴流を逆噴射させれば良い。また船の速度を上げ
るには噴出速度を早くすれば良い。[Operation] The pump portion of the spiral water jet propulsion machine of the present invention sucks water from the outer periphery into the spiral groove provided in the fixed spiral element as described above, and seals the water between the spiral groove of the movable spiral element and rotates it. , It is forcibly moved to the center and jetted into the atmosphere from the jet port provided in the center of the fixed spiral element, and the jet propulsive force of the jet flow propels the ship. Since the decrease in the jet energy of this water is much less in the atmosphere than in water, its propulsive force can be fully utilized. In addition, since there is only the entrance part of the water guiding duct that sucks water in water, the resistance of water is greatly reduced and high propulsion efficiency is obtained. The swirl speed of the movable spiral element, which is a rotating body, is the same everywhere, and the speed is obtained by multiplying the amount of eccentricity of the swivel center with respect to the center of the rotation axis by the number of shaft revolutions. Its size is extremely small compared to the speed of the propeller tip that rotates. Therefore, sliding friction loss does not increase even at high speeds. The torque of the drive shaft fluctuates to some extent depending on the jet velocity and the loss of the sliding part, but it is almost proportional to the size of the maximum enclosed space in the pump, so the shaft torque increases significantly even if the shaft speed increases. There is no such thing. Therefore, the propeller type shaft torque is 2
In the case of the spiral type, there is almost no change compared with the rapid increase in proportion to the power. As described above, since the spiral type torque has characteristics close to those of the electric motor, the electric motor can be easily driven. When the engine is driven, the size of the engine can be reduced. Further, all the movable parts such as the drive shaft and the movable spiral element are housed in the main body of the propulsion device in the atmosphere, and the suspended matter in the water does not directly contact the rotating part. When the ship is stopped or moved backward, the reverse running duct stored in the main body of the propulsion unit may be installed at the jet outlet, and then the rotation direction of the drive shaft may be reversed to inject the jet backward. To increase the speed of the ship, the ejection speed should be increased.
【０００６】[0006]
【実施例】水面や海面に浮かび水力を用いて推進する船
舶の推進機に本発明を適用した場合について説明する。
特に本発明の渦巻き式水ジェット推進機は安全性や効率
が高くて低騒音でしかも排気ガスもでないので，海岸近
辺や河川または湖などを航行する小型船舶の推進装置に
適している。以下実施例に基づき具体的に説明する。本
発明の水ジェット推進機５を水面上を航行する小型の船
体３の船尾３ａに装着した実施例の外観図を図１に示
す。図１の側面図となるＡ視図を図２に示す。水ジェッ
ト推進機５は導水用ダクト８を一体固定した推進機装着
台７上に固定され，図３の船尾平面図に示すように，水
ジェット推進機５及び推進機装着台７を除いた旋回台６
のみが船尾に固定されている。この旋回台６に水ジェッ
ト推進機５を固定した推進機装着台７が回転自由にして
装着されている。旋回台６には船尾３ａ内側平坦部に垂
直に円筒６ａが固定され，その円筒６ａ内に推進機装着
台７に固定された軸７ａが挿入されているので，この軸
７ａ回りに水ジェット推進機５は回転可能となる。また
導水用ダクト８を船尾３ａ下部で支えている回転支持枠
１１は前記軸７ａの下方に取り付けられているので，こ
の軸と同期して回転可能となる。水ジェット推進機５に
は噴流を発生させるポンプ部とそれを駆動する動力源こ
こでは電動機が一体収納されている。この電動機に別置
した発電機ないしはバッテリー（図示せず）から電気を
導くために電源用タンシ箱１３が設けられている。この
電動機を用いて水ジェット推進機５のポンプ部を作動さ
せ水を噴出させて推力を発生させる。発生した推力は推
進機装着台７から旋回台６を経て船体３に伝達されて船
舶が推進される。進行方向の変更は水ジェット推進機５
からでる噴流の方向を変更して行う。その変更には推進
機装着台７に固定された旋回レバー１２を手で持って左
右に動かして推進機装着台７を旋回台６の円筒６ａに挿
入した軸７ａ回りに回転させることにより噴流の向きを
変える。同時に推進機装着台に固定された導水用ダクト
８も回転支持枠１１回りに回転して，水の取り入れ口も
進路方向を向くことになる。また導水用ダクトの形状を
一般の方向舵と同様の機能を持たせると旋回性能はさら
に向上する。水ジェット推進機５の上部に固定したダク
ト台１０の上に設置した逆走用ダクト９は前進時には図
１の如く収納されているが，船舶を停止または後退させ
る場合は，水ジェット推進機５本体と逆走用ダクト９と
を接続するアーム９ａを用いて逆走用ダクト９を図４に
示すように設置する。設置後電動機を逆転すれば，逆走
用ダクト９下部に開けた穴からポンプ部の噴出口へ水が
吸い上げられ，ポンプ内を経て導水用ダクト８の下部か
ら噴出するので，船舶には逆推力が生じて停止または後
退する。逆走用ダクト９下部にステーを用いて支持すれ
ばさらに安定性は良くなる。次に図５〜図１５を用いて
水ジェット推進機５の構造及びポンプの動作原理につい
て説明する。図５は水ジェット推進機５の断面構造図で
ある。右方にポンプ部，左方に電動機部が配置されてい
る。ポンプ部の主要な構成要素はハウジング１４に固定
された固定渦巻き要素２と大半がハウジング１４内に運
動可能にして収納された可動渦巻き要素１の２点であ
る。図５のＡ−Ａ断面図である図６と固定渦巻き要素２
の平面図である図８に示すように，固定渦巻き要素２は
外周に設けた４ケ所の突部２ｅにボルトを挿入してハウ
ジング１４と同時にケーシング１５に固定され，内部に
はおよそ１．４巻きの渦巻き状溝２ａとその溝内の巻き
始め側に開口する噴出口２ｄと巻き終わり側に開口する
吸入口２ｃが設けられている。そして，前記渦巻き状溝
２ａ内におよそ１巻きの可動渦巻き要素１の渦巻き状突
起１ａが挿入されている。一方，固定渦巻き要素２の渦
巻き状溝２ａの底部にはおよそ１巻き強の渦巻き状をし
て溝底部を被う薄いＦスラスト板１９，端面にはおよそ
１と３／４巻きした細長いチップシール溝２ｆを設けて
その溝中に矩形状のＦチップシール２１を装着してい
る。可動渦巻き要素１は，駆動軸１７で駆動されるが，
可動渦巻き要素１背面とハウジング１４との間に配置さ
れたオルダムリング１８とでその自転運動が規制されて
いる。詳細は後述する。また可動渦巻き要素の端板１ｂ
は固定渦巻き要素２とハウジング１４の間に微小隙間を
設けて挟まれており，可動渦巻き要素１の軸方向は前記
微小隙間内での移動が可能となっている。図５のＢ−Ｂ
断面図である図７と可動渦巻き要素１の平面図である図
９及びその背面側から見た図１０に示すように，可動渦
巻き要素１は円板状の端板１ｂ上におよそ１巻きの渦巻
き状突起１ａが一体成形され，その突起の先端にはおよ
そ３／４巻きした細長いチップシール溝１ｄを設けてそ
の溝中に矩形状のＭチップシール２２を装着し，さらに
は端板１ｂ上に渦巻き状突起１ａを挿入する孔を設けた
薄いＭスラスト板２０が装着されている。そして，背面
側には中央に円柱状をした可動軸１ｃが端板１ｂに一体
成形され，その外側にキー溝１ｆが１８０度対向して２
本掘り込まれるとともに端板１ｂの外周には１本又は複
数本の弾性体であるＯリングＡ２７とそれをカバーする
スラストリング２６が装着されている。ハウジング１４
の平面図を図１１に示すように，その外周のリング壁１
４ａにボルト穴を設けた４個の突起１４ｈがあり，下側
には内側と外側を連通する排出孔１４ｇが１ケ所か複数
開口し，中央には軸穴１４ｄと裏面側に軸受取付穴１４
ｅを設けるとともにその軸穴１４ｄの端部からスラスト
受面１４ｂに向けて可動渦巻き要素のキー溝１ｆに対し
９０度回転した位置迄にキー溝１４ｃが１８０度対向し
て２本掘り込まれている。可動渦巻き要素１とハウジン
グ１４の間に設置されたオルダムリング１８の形状は図
１２に示すように，断面が矩形の環状のリング部１８ａ
の片面に１８０度対向してＭキー１８ｂが２ケ所，その
反対の面で９０度回転した位置にＨキー１８ｃが１８０
度対向して２ケ所設けられている。Ｍキー１８ｂは可動
渦巻き要素の２ケ所のキー溝１ｆに嵌合され，Ｈキー１
８ｃはハウジングの２ケ所のキー溝１４ｃに嵌合され
る。従って，オルダムリング１８はハウジング１４に対
して回転出来ないので可動渦巻き要素１の自転が防止さ
れる。ハウジングの軸受取付穴１４ｅに主軸受２９が設
けられ，その中に図１３に示す駆動軸１７の太い径の軸
部Ｂ１７ｂがつば１７ｄまで嵌め込まれる。軸部Ｂ１７
ｂには可動軸受３１が取り付けられ，その中に可動渦巻
き要素の可動軸１ｃが回転自由にして挿入される。一
方，図５左方の電動機部の主要な構成要素はケーシング
の円筒部１５ａ内に固定されたステータと回転部である
ロータで構成された電動機３２である。ロータの回転中
心には駆動軸１７が固定され，ロータ端部左右にはバラ
ンスウエイト３３と３４を取り付けて低振動化を図って
いる。ケーシングの側面カバー１５ｂ内に収納された給
油ポンプ３５は，駆動軸１７の端部に設けたポンプ軸１
７ｃにより駆動され，ケーシング１５の下部に封入され
た潤滑油３６を給油通路１５ｄから吸い上げ，駆動軸内
に設けた給油孔Ａ１７ｅへ油を送り込んだ後，旋回軸受
３１や軸部Ｂ内に開けた給油孔Ｂ１７ｆから油を送り各
摺動部の潤滑を行う。さらに，可動渦巻き要素１の詳し
い構造を図１４の分解図を用いて説明する。図９で示し
たように渦巻き状突起１ａの巻き始め側にはラップ弁２
３が装着されている。その構成を図１４の分解図に示
す。渦巻き状突起１ａの巻き始め側にある切欠き部１ｇ
に下部に設けた取付穴１ｈに復帰バネ２５のストッパＢ
側と回転ピン２４の下方が挿入され，その上から復帰バ
ネ２５のストッパＡ側と回転ピン２４の上方がラップ弁
取付穴２３ａに挿入して取り付けられる。さらには，ラ
ップ弁２３と切欠き部１ｇにそれぞれ設けた磁石２３
ｂ，１ｊによりラップ弁全体が構成される。ラップ弁２
３に流体が作用しないときは復帰バネ２５と磁石２３
ｂ，１ｊにより，図９に示すように渦巻き状突起１ａと
同じプロフィル上に収まっている。そして端板１ｂの下
部にある外周段差１ｅに弾性シール材ここでは２本のＯ
リング２７を取り付けその上からスラストリング２６を
嵌め込んで可動渦巻き要素１を構成している。またハウ
ジング１４とケーシング１５の間はＯリングＢ２８にて
シールしているのでケーシング１５内に水が流入するこ
とはない。図６，７では固定渦巻き要素２，ハウジング
１４及びケーシング１５はボルトで一体固定されている
が，ボルトを用いないでそれぞれを推進機装着台７にガ
イドを設けて位置合わによって合体して固定する方法ま
たは推進機装着台側からボルト固定する方法もある。以
上の如く構成された水ジェット推進機５の働きについて
以下説明する。渦巻き式流体機械の動作原理は特公昭６
３−５９０３２や（社）日本冷凍協会発行の月刊誌「冷
凍」の１９８７年１０月号（ＶＯＬ．６２ Ｎｏ．７２
０）の表題「密閉スクロール」にも詳しく述べられてい
るので，ここでの説明は簡単にする。駆動軸１７の回転
に伴い，オルダムリング１８によって自転ができない可
動渦巻き要素１は公転のみの旋回運動をする。その旋回
半径は駆動軸と可動軸１ｃの軸心の偏心量に等しくな
る。図６に示すように，固定渦巻き要素の渦巻き状溝２
ａ内である吸入口２ｃから噴出口２ｄへと連通している
断面が矩形状の空間は可動渦巻き要素の渦巻き状突起１
ａによって仕切られて３つの空間に分割されている。そ
して，可動渦巻き要素１の旋回運動に伴う移動とともに
これら空間に充満した水も同様に移動する。図６の可動
渦巻き要素の渦巻き状突起外壁と固定渦巻き要素の渦巻
き状溝外壁との間で形成される空間はおよそ密閉状態に
あり，気体を吸引する力も十分にある。従って，水面が
水ジェット推進機５のポンプ部より下方にあっても吸入
口内を負圧状態にして下から水を吸い上げることができ
る。船舶を前進させるときは，導水用ダクトを経て吸入
口から流入したを外側から中央に向かって移動させて噴
出口２ｄから噴出させる。停止または後進させるときは
逆走用ダクトを経て噴出口から流入させて，逆に中央か
ら外側に向かって移動して水が導水口ダクト８側から噴
出させる。前記空間内の水が下流側の他の空間に流出す
ると推進能力が低下するので，可動渦巻き要素１や固定
渦巻き要素２に装着したＦスラスト板１９とＭスラスト
板２０及びＦチップシール２１とＭチップシール２２と
でシールしてこれを防止する。一方，可動渦巻き要素の
背面に多数存在する摺動部にポンプ部の水が侵入しない
ように，端板１ｂ外周の空間に水が侵入した場合には，
ハウジングのリング壁１４ａの下部に設けた排出孔１４
ｇから外部に排出すると同時に端板１ｂ背面外周側にス
ラストリング２６を設けてハウジング１４との間をシー
ルしている。ポンプ部の流体圧力で可動渦巻き要素はハ
ウジング側に押されその力をスラストリング部で受けて
シールしているが，その力が無い場合でもＯリングＡ２
７の弾性力でスラストリング２６を押し付けてシールす
るのでハウジング１４内の摺動部に水が流入することは
ない。可動渦巻き要素１の旋回中心は駆動軸の回転中心
に対して偏心しているので遠心力は発生するが，電動機
１５のロータに設けた２個のバランスウエイトにより慣
性力とモーメントの釣り合いが保たれるので大きな振動
は発生しない。本発明の水ジェット推進機のポンプ部に
容積式を用いているために水をポンプ内に閉じ込めた後
さらに駆動軸を回転するとポンプ内で液圧縮が発生する
危険性がある。この液圧縮を防止する目的から可動渦巻
き要素の渦巻き状突起１ａにラップ弁２３を設けてい
る。ラップ弁の構成は既に図１４で説明済みである。こ
こでは図１５を用いてその動作について説明する。図１
５は固定渦巻き要素の渦巻き状溝２ａと可動渦巻き要素
の渦巻き状突起１ａが噛み合った状態を示している。
（ａ）〜（ｄ）の４枚の図は可動渦巻き要素が旋回して
噛み合いの状態がそれぞれ変化している。（ａ）図は渦
巻き状溝２ａの外壁と渦巻き状突起１ａの外壁との間で
形成される空間Ｑは密閉状態にある。この状態から駆動
軸が回転し可動渦巻き要素が旋回すると空間Ｑは渦巻き
状溝に沿って中に移動するとともにその空間の容積も縮
小する。そして，渦巻き状突起の巻き始め側の渦巻き状
溝壁面との隙間が大きくなり空間Ｑ内の水を空間Ｐ側に
排出することになる。しかし，その隙間は当初小さい為
にその隙間のみでは空間Ｑ内で液圧縮による異常圧力が
発生することがある。この液圧縮を防止するのがラップ
弁２３である。その作動状態は（ｂ）図に示すように，
空間Ｑの圧力が空間Ｐより大きくなると，その差圧がラ
ップ弁２３に作用して空間Ｐ側に押し開けて，空間Ｑ内
の水を空間Ｐ側に十分に排出できるので，空間Ｑ内の圧
力が異常上昇することはない。次に，（ｃ）図に示す渦
巻き状溝の内壁と渦巻き状突起内側で形成される空間Ｒ
の場合について説明する。この空間Ｒも密閉状態あり，
さらに駆動軸の回転に伴う可動渦巻き要素の旋回運動に
より，（ｄ）図に示す状態に移行して空間Ｒ内の圧力が
上昇するが，その圧力が空間Ｑより上昇してその差圧が
ラップ弁に作用すると空間Ｑ側に押し開けて隙間を大き
くし空間Ｒ内の水を空間Ｑ側に十分に排出できるので，
（ｂ）図同様，空間Ｒ内の圧力が異常に上昇することは
ない。EXAMPLE A case will be described in which the present invention is applied to a propulsion device of a ship that floats on the water surface or the sea surface and is propelled using hydraulic power.
In particular, the spiral water jet propulsion device of the present invention is highly safe and efficient, has low noise, and emits no exhaust gas, and therefore is suitable for a propulsion device for a small vessel that sails near a coast, a river or a lake. Specific description will be given below based on examples. FIG. 1 shows an external view of an embodiment in which the water jet propulsion device 5 of the present invention is mounted on the stern 3a of a small hull 3 which sails on the water surface. FIG. 2 shows an A view as a side view of FIG. The water jet propulsion device 5 is fixed on the propulsion device mounting base 7 to which the water guiding duct 8 is integrally fixed. As shown in the stern plan view of FIG. 3, the water jet propulsion device 5 and the propelling device mounting base 7 are swung. Stand 6
Only the stern is fixed. On the swivel base 6 , a propulsion device mounting base 7 having the water jet propulsion device 5 fixed thereto is rotatably mounted. A cylinder 6a is fixed to the swivel base 6 perpendicularly to the inner flat portion of the stern 3a, and a shaft 7a fixed to a propulsion machine mounting base 7 is inserted into the cylinder 6a. The machine 5 becomes rotatable. Further, since the rotation support frame 11 supporting the water guiding duct 8 at the lower part of the stern 3a is attached below the shaft 7a, it can rotate in synchronization with this shaft. In the water jet propulsion unit 5 , a pump unit for generating a jet flow and a power source for driving the pump unit are housed here. A power source box 13 is provided to guide electricity from a generator or a battery (not shown) separately installed in the electric motor. Using this electric motor, the pump portion of the water jet propulsion device 5 is operated to eject water to generate thrust. The generated thrust is transmitted from the propulsion unit mounting base 7 through the swivel base 6 to the hull 3 to propel the ship. Water jet propulsion machine 5
This is done by changing the direction of the jet flow. In order to change the jet flow, the swivel lever 12 fixed to the propulsion unit mounting base 7 is held by hand and moved left and right to rotate the propulsion unit mounting base 7 around the shaft 7a inserted into the cylinder 6a of the swivel mounting unit 6 . Change direction. At the same time, the water guiding duct 8 fixed to the propeller mounting base also rotates around the rotary support frame 11, so that the water intake port also faces in the path direction. If the shape of the water guiding duct has the same function as a general rudder, the turning performance is further improved. The reverse running duct 9 installed on the duct stand 10 fixed to the upper part of the water jet propulsion device 5 is housed as shown in FIG. 1 when moving forward, but when the boat is stopped or retracted, the water jet propulsion device 5 is used. The reverse running duct 9 is installed as shown in FIG. 4 using the arm 9a connecting the main body and the reverse running duct 9. If the electric motor is reversed after installation, water will be sucked up from the hole formed in the lower part of the reverse running duct 9 to the jet outlet of the pump section and will be jetted from the lower part of the water guiding duct 8 through the inside of the pump. Occurs and stops or retreats. Stability is further improved by supporting the lower part of the reverse running duct 9 with a stay. Next, the structure of the water jet propulsion device 5 and the operating principle of the pump will be described with reference to FIGS. FIG. 5 is a sectional structural view of the water jet propulsion device 5 . The pump section is on the right and the motor section is on the left. The main components of the pump part are a fixed spiral element 2 fixed to the housing 14 and a movable spiral element 1 mostly movably housed in the housing 14. 6 which is a sectional view taken along the line AA of FIG. 5 and the fixed spiral element 2
As shown in FIG. 8 which is a plan view of the fixed spiral element 2, bolts are inserted into four protrusions 2e provided on the outer periphery of the fixed spiral element 2 and are fixed to the housing 15 at the same time as the housing 14, and about 1.4 A spiral groove 2a for winding, a jet port 2d opening to the winding start side and an intake port 2c opening to the winding end side in the groove are provided. Then, the spiral projection 1a of the movable spiral element 1 of about one turn is inserted into the spiral groove 2a. On the other hand, the bottom of the spiral groove 2a of the fixed spiral element 2 has a thin F thrust plate 19 which has a spiral shape of about 1 turn and covers the groove bottom, and the end face has a long and narrow tip seal of about 1 and 3/4 turns. A groove 2f is provided and a rectangular F-tip seal 21 is mounted in the groove. The movable spiral element 1 is driven by a drive shaft 17,
The rotation of the movable spiral element 1 is restricted by the Oldham ring 18 arranged between the rear surface of the movable spiral element 1 and the housing 14. Details will be described later. Also, the end plate 1b of the movable spiral element
Is sandwiched between the fixed spiral element 2 and the housing 14 with a minute gap therebetween, and the movable spiral element 1 can move in the axial direction in the minute gap. BB of FIG.
As shown in FIG. 7 which is a cross-sectional view, FIG. 9 which is a plan view of the movable spiral element 1 and FIG. 10 which is seen from the rear side thereof, the movable spiral element 1 has about one turn on a disc-shaped end plate 1b. The spiral protrusion 1a is integrally formed, and a long and narrow 3/4 turn elongated tip seal groove 1d is provided at the tip of the protrusion, and a rectangular M tip seal 22 is mounted in the groove, and further on the end plate 1b. A thin M thrust plate 20 having a hole into which the spiral protrusion 1a is inserted is mounted. On the back side, a movable shaft 1c having a cylindrical shape is formed integrally with the end plate 1b on the back side, and a key groove 1f is provided on the outer side thereof so as to face 180 degrees.
Along with the main digging, one or a plurality of O-rings A27, which are elastic bodies, and a thrust ring 26 that covers the O-rings A27 are attached to the outer periphery of the end plate 1b. Housing 14
As shown in the plan view of FIG.
There are four protrusions 14h having bolt holes in 4a, one or a plurality of discharge holes 14g communicating between the inside and the outside on the lower side, a shaft hole 14d in the center and a bearing mounting hole 14 on the back side.
Two key grooves 14c are dug facing each other 180 degrees from the end of the shaft hole 14d toward the thrust receiving surface 14b to a position rotated by 90 degrees with respect to the key groove 1f of the movable spiral element. There is. As shown in FIG. 12, the shape of the Oldham ring 18 installed between the movable spiral element 1 and the housing 14 is an annular ring portion 18a having a rectangular cross section.
There are two M keys 18b facing each other 180 degrees on one side, and the H key 18c is 180 degrees on the opposite side rotated by 90 degrees.
There are two places facing each other. The M key 18b is fitted into the two key grooves 1f of the movable spiral element, and the H key 1
8c is fitted in two key grooves 14c of the housing. Therefore, since the Oldham ring 18 cannot rotate with respect to the housing 14, rotation of the movable spiral element 1 is prevented. A main bearing 29 is provided in the bearing mounting hole 14e of the housing, and a shaft portion B17b having a large diameter of the drive shaft 17 shown in FIG. 13 is fitted therein up to the collar 17d. Shaft B17
A movable bearing 31 is attached to b, and the movable shaft 1c of the movable spiral element is rotatably inserted therein. On the other hand, the main constituent element of the electric motor section on the left side of FIG. 5 is an electric motor 32 composed of a stator fixed in the cylindrical portion 15a of the casing and a rotor that is a rotating portion. The drive shaft 17 is fixed to the center of rotation of the rotor, and balance weights 33 and 34 are attached to the left and right ends of the rotor to reduce vibration. The fuel pump 35 housed in the side cover 15b of the casing is the pump shaft 1 provided at the end of the drive shaft 17.
Driven by 7c, the lubricating oil 36 enclosed in the lower part of the casing 15 is sucked up from the oil supply passage 15d, sent to the oil supply hole A17e provided in the drive shaft, and then opened in the slewing bearing 31 and the shaft portion B. Oil is fed from the oil supply hole B17f to lubricate each sliding portion. Further, the detailed structure of the movable spiral element 1 will be described with reference to the exploded view of FIG. As shown in FIG. 9, the lap valve 2 is provided on the winding start side of the spiral protrusion 1a.
3 is attached. The structure is shown in the exploded view of FIG. Notch 1g on the winding start side of the spiral protrusion 1a
The stopper B of the return spring 25 is attached to the mounting hole 1h provided in the lower part of the
The side and the lower side of the rotary pin 24 are inserted, and the stopper A side of the return spring 25 and the upper side of the rotary pin 24 are inserted into the lap valve mounting hole 23a from above and attached. Furthermore, the lap valve 23 and the magnet 23 provided in the notch 1g, respectively.
The entire lap valve is composed of b and 1j. Lap valve 2
When the fluid does not act on 3, the return spring 25 and the magnet 23
Due to b and 1j, they are contained on the same profile as the spiral projection 1a as shown in FIG. The outer peripheral step 1e at the bottom of the end plate 1b has two elastic sealing materials,
The ring 27 is attached and the thrust ring 26 is fitted on the ring 27 to form the movable spiral element 1. Further, since the O-ring B28 seals between the housing 14 and the casing 15, water does not flow into the casing 15. In FIGS. 6 and 7, the fixed spiral element 2, the housing 14 and the casing 15 are integrally fixed by bolts, but without using bolts, each is fixed by combining the propelling machine mounting base 7 with a guide and positioning them. There is also a method or a method of fixing bolts from the side of the propeller mounting base. The operation of the water jet propulsion device 5 configured as described above will be described below. The working principle of the spiral fluid machine is Japanese Patent Publication No. 6
3-59032 and October 1987 issue of the monthly magazine "Frozen" published by Japan Frozen Association (VOL.62 No.72).
It is also described in detail in the title of “0),“ Closed scroll ”, so the explanation here will be simplified. With the rotation of the drive shaft 17, the movable spiral element 1 which cannot be rotated by the Oldham ring 18 makes a revolving motion only by the revolution. The turning radius is equal to the amount of eccentricity between the drive shaft and the movable shaft 1c. As shown in FIG. 6, the spiral groove 2 of the fixed spiral element
The space having a rectangular cross section that communicates from the suction port 2c in the a to the ejection port 2d is a spiral protrusion 1 of the movable spiral element.
It is divided by a and divided into three spaces. Then, along with the movement of the movable spiral element 1 due to the turning movement, the water filled in these spaces also moves. The space formed between the outer wall of the spiral protrusion of the movable spiral element and the outer wall of the spiral groove of the fixed spiral element shown in FIG. 6 is in a substantially sealed state, and has a sufficient gas suction force. Therefore, even if the water surface is below the pump portion of the water jet propulsion device 5 , the suction port can be made to have a negative pressure and water can be sucked up from below. When advancing the vessel, the water flowing from the suction port through the water guiding duct is moved from the outside toward the center and jetted from the jet port 2d. When it is stopped or moved backward, it is made to flow from the jet port through the reverse running duct, and on the contrary, it moves outward from the center to jet water from the water guide duct 8 side. When the water in the space flows out to the other space on the downstream side, the propulsion ability is lowered, so that the F thrust plate 19 and the M thrust plate 20 and the F tip seal 21 and the M tip mounted on the movable spiral element 1 and the fixed spiral element 2 are reduced. This is prevented by sealing with the tip seal 22. On the other hand, when water enters the space around the end plate 1b so that the water in the pump part does not enter the sliding parts that are present on the back surface of the movable spiral element,
Discharge hole 14 provided under the ring wall 14a of the housing
At the same time as discharging from g, the thrust ring 26 is provided on the outer peripheral side of the back surface of the end plate 1b to seal the gap with the housing 14. The movable swirl element is pushed toward the housing by the fluid pressure of the pump part, and the thrust ring part receives the force and seals it, but even if there is no such force, the O-ring A2
Since the thrust ring 26 is pressed and sealed by the elastic force of 7, the water does not flow into the sliding portion in the housing 14. Since the center of rotation of the movable spiral element 1 is eccentric with respect to the center of rotation of the drive shaft, centrifugal force is generated, but the balance between inertial force and moment is maintained by the two balance weights provided on the rotor of the electric motor 15. Therefore, large vibration does not occur. Since the pump portion of the water jet propulsion device of the present invention uses a positive displacement type, if water is confined in the pump and the drive shaft is further rotated, liquid compression may occur in the pump. A lap valve 23 is provided on the spiral projection 1a of the movable spiral element for the purpose of preventing this liquid compression. The structure of the lap valve has already been described with reference to FIG. Here, the operation will be described with reference to FIG. FIG.
Reference numeral 5 shows a state in which the spiral groove 2a of the fixed spiral element and the spiral protrusion 1a of the movable spiral element mesh with each other.
In the four drawings of (a) to (d), the movable spiral element swivels to change the meshing state. In the figure (a), the space Q formed between the outer wall of the spiral groove 2a and the outer wall of the spiral protrusion 1a is in a sealed state. When the drive shaft rotates and the movable spiral element swirls from this state, the space Q moves inward along the spiral groove and the volume of the space also decreases. Then, the gap between the spiral projection and the wall surface of the spiral groove on the winding start side becomes large, and the water in the space Q is discharged to the space P side. However, since the gap is initially small, an abnormal pressure due to liquid compression may occur in the space Q only with the gap. The lap valve 23 prevents this liquid compression. The operating state is as shown in FIG.
When the pressure in the space Q becomes larger than that in the space P, the differential pressure acts on the lap valve 23 to push it toward the space P side, and the water in the space Q can be sufficiently discharged to the space P side. The pressure does not rise abnormally. Next, the space R formed inside the spiral groove and the inner wall of the spiral groove shown in FIG.
The case will be described. This space R also has a closed state,
Further, due to the swirling motion of the movable spiral element associated with the rotation of the drive shaft, the state shown in FIG. 7 (d) is entered and the pressure in the space R rises. However, the pressure rises from the space Q and the differential pressure wraps. When it acts on the valve, it opens to the space Q side to enlarge the gap, and the water in the space R can be sufficiently discharged to the space Q side.
As in the diagram (b), the pressure in the space R does not rise abnormally.
【０００７】[0007]
【発明の効果】以上の如く構成された船舶の推進に用い
られる水ジェット推進機は回転体などの可動部が固定渦
巻き要素やハウジングなどの容器内に収められて外部に
露出しておらず，回転体が物体に接触して破損したり，
近くにいる人間に接触して危害を加える心配もなく安全
性が極めて高い。また推進機は水面上に設置して，水面
下に設けたダクトの水の取り入れ口から吸い上げて水を
大気中に噴出させて推進させる為に水中での抵抗が極め
て少ない上に水の噴出抵抗が少ないので高い推進効率が
得られる。さらには，ＦやＭスラスト板のようなシール
機構を有した容積式ポンプ機構のために漏れ損失が少な
いのと可動渦巻き要素の動きが旋回運動であるためにそ
の摺動速度は小さくキャビテーションの発生もほとんど
無く高効率が達成できると同時に低振動低騒音が達成で
きる効果がある。また，駆動軸に作用するトルクは軸回
転数に殆ど依存しないので，電動機の使用が容易となり
エンジンのように排気ガスを出すこともなく環境保護の
効果もある。船の進路は水ジェット推進機５のポンプ部
から出る水の噴流の向きを直接換えて行う。また，船を
停止，逆進させる場合には逆走用ダウトを設置した後，
駆動軸を逆転させて水を噴出口側から吸い込み吸込みガ
イドから噴出させることにより達成できるなど機動性が
高まる効果がある。高速航行すると，前が浮き上がり不
安定になるが，そのような場合は水ジェット推進機の噴
出口を下方に向けるか，ガイドを用いて下方に噴出させ
れば船尾を持ち上げる力が発生するので安定した高速航
行ができ，一層の高速航行が可能となる。In the water jet propulsion machine used for propulsion of a ship constructed as described above, the movable part such as a rotating body is not exposed to the outside because it is housed in a container such as a fixed spiral element or a housing. The rotating body comes into contact with an object and is damaged,
The safety is extremely high without the risk of harming people nearby. In addition, since the propulsion unit is installed above the water surface, it sucks up from the water intake of the duct provided below the water surface and ejects the water into the atmosphere for propulsion, so there is very little resistance in water and the water ejection resistance. Since there are few, high propulsion efficiency can be obtained. Further, since the positive displacement pump mechanism having the sealing mechanism such as the F or M thrust plate has a small leakage loss, and the movement of the movable spiral element is a swirling movement, the sliding speed thereof is small and cavitation occurs. It is possible to achieve high efficiency and low vibration and low noise at the same time. In addition, since the torque acting on the drive shaft hardly depends on the shaft speed, the electric motor can be used easily, and unlike the engine, exhaust gas is not emitted and the environment is protected. The course of the ship is carried out by directly changing the direction of the jet of water emitted from the pump section of the water jet propulsion device 5 . In addition, if you want to stop the boat and go backwards, after installing a reverse run dout,
This can be achieved by reversing the drive shaft and sucking water from the jet outlet side and jetting it from the suction guide. When navigating at high speed, the front of the watercraft rises and becomes unstable. In such a case, if the jet outlet of the water jet propulsion machine is directed downwards, or if it is jetted downward using a guide, a force to lift the stern is generated, so it is stable. High speed navigation is possible and even higher speed navigation is possible.
【図１】 船舶全体の外観図[Figure 1] External view of the entire ship
【図２】 図１のＡ視図FIG. 2 is a view from A of FIG.
【図３】 推進機装着台取付状態の平面図FIG. 3 is a plan view of the propulsion machine mounting table mounted state.
【図４】 逆走ダクト装着図[Figure 4] Reverse run duct installation diagram
【図５】 水ジェット推進機の断面図FIG. 5 is a sectional view of the water jet propulsion device.
【図６】 図５のＡ−Ａ断面図FIG. 6 is a sectional view taken along line AA of FIG. 5;
【図７】 図５のＢ−Ｂ断面図7 is a sectional view taken along line BB of FIG.
【図８】 固定渦巻き要素の平面図FIG. 8 is a plan view of a fixed spiral element.
【図９】 可動渦巻き要素の平面図FIG. 9 is a plan view of a movable spiral element.
【図１０】 ハウジングの平面図FIG. 10 is a plan view of the housing.
【図１１】 可動渦巻き要素背面側平面図FIG. 11 is a plan view of the back side of the movable spiral element.
【図１２】 オルダムリングの平面図FIG. 12 is a plan view of an Oldham ring.
【図１３】 主軸の外観図[Fig. 13] External view of the spindle
【図１４】 可動渦巻き要素の分解図FIG. 14 is an exploded view of a movable spiral element
【図１５】 ラップ弁の作動状態説明図FIG. 15 is an explanatory diagram of the operating state of the lap valve.
１は可動渦巻き要素 １ａは渦巻き状突起 １ｂは
端板 １ｃは可動軸 １ｄはチップシール溝 １ｅは外周
段差 １ｆはキー溝 １ｇは切欠き部 １ｈは取付穴
１ｊは磁石 ２は固定渦巻き要素 ２ａは渦巻き状溝 ２ｂは球
根状突起 ２ｃは吸入口 ２ｄは噴出口 ２ｅは突部 ２ｆ
はチップシール溝３ は船体 ３ａは船尾 ４は船外機 ５は水ジェ
ット推進機６ は旋回台 ６ａは円筒 ７は推進機装着台 ７
ａは軸 ８は導水用ダクト ９は逆走用ダクト １０はダク
ト台 １１は回転支持枠 １２は旋回レバー １３は電源
用タンシ箱 １４はハウジング １４ａはリング壁 １４ｂはス
ラスト受面 １４ｃはキー溝 １４ｄは軸穴 １４ｅは軸受取付
穴 １４ｆはＯリング溝 １４ｇは排出孔 １４ｈは突
起 １５はケーシング １５ａは円筒部 １５ｂは側面
カバー部 １５ｃは軸受ボス １５ｄは給油通路 １６はダク
ト用旋回ステー １７は駆動軸 １７ａは軸部Ａ １７ｂは軸部Ｂ
１７ｃはポンプ軸 １７ｄはつば １７ｅは給油孔Ａ １７ｆは給油孔Ｂ １８はオルダムリング １８ａはリング部 １８ｂ
はＭキー １８ｃはＨキー １９はＦスラスト板 ２０はＭス
ラスト板 ２１はＦチップシール ２２はＭチップシール ２
３はラップ弁 ２３ａは取付穴 ２３ｂは磁石 ２４は回転ピン
２５は復帰バネ ２５ａはストッパＡ ２５ｂはストッパＢ ２６は
スラストリング ２７はＯリングＡ ２８はＯリングＢ ２９は主軸
受 ３０は副軸受 ３１は旋回軸受 ３２は電動機 ３３はＭバランス
ウエイト ３４はＳバランスウエイト ３５は給油ポンプ ３
６は潤滑油1 is a movable spiral element 1a is a spiral protrusion 1b is an end plate 1c is a movable shaft 1d is a tip seal groove 1e is an outer peripheral step 1f is a key groove 1g is a notch 1h is a mounting hole
1j is a magnet 2 is a fixed spiral element 2a is a spiral groove 2b is a bulbous protrusion 2c is an inlet port 2d is a jet port 2e is a protrusion 2f
The tip seal groove 3 hull 3 a stern 4 outboard motor 5 is water jet propulsion unit 6 is swivel base 6a is cylindrical. 7 propulsion unit mount base 7
a is a shaft 8 is a water guiding duct 9 is a reverse running duct 10 is a duct stand 11 is a rotary support frame 12 is a swiveling lever 13 is a power source trash box 14 is a housing 14a is a ring wall 14b is a thrust receiving surface 14c is a key groove 14d Is a shaft hole 14e is a bearing mounting hole 14f is an O-ring groove 14g is a discharge hole 14h is a projection 15 is a casing 15a is a cylindrical portion 15b is a side cover portion 15c is a bearing boss 15d is an oil supply passage 16 is a duct swivel stay 17 is a drive shaft 17a is a shaft portion A 17b is a shaft portion B
17c is a pump shaft 17d is a collar 17e is an oil supply hole A 17f is an oil supply hole B 18 is an Oldham ring 18a is a ring portion 18b
Is M key 18c is H key 19 is F thrust plate 20 is M thrust plate 21 is F tip seal 22 is M tip seal 2
3 is a lap valve 23a is a mounting hole 23b is a magnet 24 is a rotating pin
25 is a return spring 25a is a stopper A 25b is a stopper B 26 is a thrust ring 27 is an O ring A 28 is an O ring B 29 is a main bearing 30 is a sub bearing 31 is a swivel bearing 32 is an electric motor 33 is an M balance weight 34 is an S balance Weight 35 is refueling pump 3
6 is lubricating oil
Claims (2)
て， （１） 厚板に渦巻き状溝２ａを設け，その厚板の中央
部に前記溝２ａの反対側からこの溝２ａの巻き始め側に
連通する噴出口と溝２ａの巻き終わり側から外周壁へ連
通する吸入口を設けた固定渦巻き要素２と端板に渦巻き
状突起１ａを設けた可動渦巻き要素１の渦巻き形状部を
互いに噛み合わせて形成したポンプ構造。 （２）渦巻き状溝２ａの噴出口の反対側端面及び渦巻き
状突起１ａ先端それぞれに細長い溝を設けてチップシー
ルを嵌合させ，さらには渦巻き状溝２ａ底部及び可動渦
巻き要素端板１ｂ上にそれぞれスラスト板を設けて形成
したポンプ室のシール機構。 （３） 矩形断面リングの片面に１８０度対向した２ケ
所のキーと前記キーより９０度回転させた位置の反対面
のリング上にやはり１８０度対向した位置に２ケ所キー
を設け，これらのキーをそれぞれ可動渦巻き要素１のキ
ー溝とハウジングのキー溝に嵌合して形成した自転防止
機構。 （４） ハウジング中央に設けた主軸受に支えられ電動
機に直結された駆動軸の一方の端面に偏心して開けた穴
に可動渦巻き要素１の旋回軸を挿入して形成した動力伝
達機構。 （５） 可動渦巻き要素端板１ｂのハウジング側に弾性
体とスラストリングとで構成されるスラスト軸受を兼ね
るスラストシール機構及びハウジングのリング壁部に内
外を貫通する穴を設けて駆動軸を内蔵した空間内に水が
侵入するのを防止した構造。 （６） ケーシング側面カバー側の駆動軸端面に設けた
給油ポンプを用いて，ケーシング内の潤滑油を給油通路
や駆動軸内給油孔を介して各摺動部に給油して再びケー
シング内に油を戻す給油構造。 （７） 可動渦巻き要素渦巻き状突起１ａの巻き始め側
に設けたラップ弁２３，復帰バネ，回転ピン及び磁石で
構成される液圧縮防止機構。 （８） 電動機及び駆動軸等を内蔵したケーシングに固
定渦巻き要素２とハウジングを複数のボルトを介して一
体固定して可動渦巻き要素１等で構成される回転部を外
部に露出させない密閉構造。 以上の如く構成されたことを特徴とする水ジェット推進
機。1. A device for propelling a ship utilizing hydraulic power, comprising: (1) A spiral groove 2a is provided in a thick plate, and a winding start side of this groove 2a is provided at the center of the thick plate from the side opposite to the groove 2a. The fixed spiral element 2 provided with a jet port communicating with the end of the groove 2a and the suction port communicating with the outer peripheral wall from the winding end side of the groove 2a and the spiral shape portion of the movable spiral element 1 having a spiral projection 1a on the end plate are meshed with each other. Formed pump structure. (2) An elongated groove is provided on each of the end face of the spiral groove 2a on the opposite side of the ejection port and the tip of the spiral projection 1a to fit a chip seal, and further, on the bottom of the spiral groove 2a and the movable spiral element end plate 1b. A pump chamber sealing mechanism formed by providing thrust plates. (3) Two keys are provided on one side of the rectangular cross-section ring that are opposite to each other by 180 degrees, and two keys are also provided on the opposite surface of the ring that is rotated by 90 degrees from the above-mentioned key and are also opposite to each other by 180 degrees. Of the movable spiral element 1 and the key groove of the housing. (4) A power transmission mechanism formed by inserting the swivel shaft of the movable spiral element 1 into a hole eccentrically formed on one end surface of a drive shaft supported by a main bearing provided in the center of the housing and directly connected to the electric motor. (5) On the housing side of the movable spiral element end plate 1b, a thrust seal mechanism which also serves as a thrust bearing composed of an elastic body and a thrust ring, and a ring wall portion of the housing are provided with a hole penetrating the inside and the outside to have a drive shaft built therein. Structure that prevents water from entering the space. (6) Using a lubrication pump provided on the end face of the drive shaft on the side cover side of the casing, lubrication oil in the casing is replenished to each sliding portion through the lubrication passage and the lubrication hole in the drive shaft, and the oil is reconstituted in the casing. Refueling structure to return. (7) Movable spiral element A liquid compression prevention mechanism including a lap valve 23 provided on the winding start side of the spiral protrusion 1a, a return spring, a rotation pin, and a magnet. (8) A hermetically sealed structure in which the fixed spiral element 2 and the housing are integrally fixed to a casing having a built-in electric motor, a drive shaft, etc. via a plurality of bolts so that the rotating portion constituted by the movable spiral element 1 and the like is not exposed to the outside. A water jet propulsion machine configured as described above.
て， （１） 逆走用ダクトを収納し，電動機に直結する電源
タンシを設けた請求項１の水ジェット推進機５，水ジェ
ット推進機５の吸入口に連通する導水用ダクト及び旋回
レバーを固定し，下面に円柱状の棒７ａを設けた推進機
装着台。 （２） 船尾に固定され，下面に円筒６ａを装着すると
ともにこの円筒内に前記推進機装着台の棒７ａを回転自
由にして挿入して水ジェット推進機５本体を乗せた旋回
台を船尾の水面上に固定した構造。 以上の如く構成されたことを特徴とする船舶の推進装
置。2. A watercraft propulsion apparatus according to claim 1, wherein the water jet propulsion device 5 and the water jet propulsion device according to claim 1, wherein: (1) a reverse running duct is housed and a power source tank directly connected to the electric motor is provided. A propulsion machine mounting base on which a water guiding duct communicating with the suction port of the machine 5 and a turning lever are fixed, and a cylindrical rod 7a is provided on the lower surface. (2) A swivel base fixed to the stern and having a lower surface to which a cylinder 6a is mounted and the rod 7a of the propulsion machine mounting base being freely rotatable inserted into the cylinder to mount the water jet propulsion machine 5 main body on the stern. Structure fixed on the water surface. A propulsion device for a ship configured as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26196195A JPH0971296A (en) | 1995-09-04 | 1995-09-04 | Water jet propulsion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26196195A JPH0971296A (en) | 1995-09-04 | 1995-09-04 | Water jet propulsion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0971296A true JPH0971296A (en) | 1997-03-18 |
Family
ID=17369066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26196195A Pending JPH0971296A (en) | 1995-09-04 | 1995-09-04 | Water jet propulsion machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0971296A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008543623A (en) * | 2005-04-11 | 2008-12-04 | ブライアン オコーナー | Variable area pump delivery system |
| CN102923289A (en) * | 2012-07-23 | 2013-02-13 | 北京工业大学 | Miniature underwear propeller and method for producing same |
| CN113022828A (en) * | 2021-04-12 | 2021-06-25 | 白城师范学院 | Propeller of self-adjusting applicable underwater robot |
| JP2021532025A (en) * | 2018-09-19 | 2021-11-25 | 浙江唯海科技有限公司 | Duct type marine propeller |
| CN114987729A (en) * | 2022-05-30 | 2022-09-02 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion unit and boats and ships |
-
1995
- 1995-09-04 JP JP26196195A patent/JPH0971296A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008543623A (en) * | 2005-04-11 | 2008-12-04 | ブライアン オコーナー | Variable area pump delivery system |
| CN102923289A (en) * | 2012-07-23 | 2013-02-13 | 北京工业大学 | Miniature underwear propeller and method for producing same |
| CN102923289B (en) * | 2012-07-23 | 2015-04-29 | 北京工业大学 | Miniature underwear propeller and method for producing same |
| JP2021532025A (en) * | 2018-09-19 | 2021-11-25 | 浙江唯海科技有限公司 | Duct type marine propeller |
| CN113022828A (en) * | 2021-04-12 | 2021-06-25 | 白城师范学院 | Propeller of self-adjusting applicable underwater robot |
| CN113022828B (en) * | 2021-04-12 | 2022-03-04 | 白城师范学院 | Propeller of self-adjusting applicable underwater robot |
| CN114987729A (en) * | 2022-05-30 | 2022-09-02 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion unit and boats and ships |
| CN114987729B (en) * | 2022-05-30 | 2024-03-26 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion unit and boats and ships |
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