公开(公告)号：US6159060A

公开(公告)日：2000-12-12

申请号：US366643

申请日：1999-08-04

申请人： John G. Purnell ,  Alan J. Becnel

发明人： John G. Purnell ,  Alan J. Becnel

IPC分类号： B63H5/14 ,  B63H5/16 ,  B63H11/06 ,  B63H11/01

CPC分类号： B63H5/14 ,  B63H11/06 ,  B63H5/16

摘要： A pump-jet type of outboard propulsion unit within a surrounding fluid mem for marine craft or the like, is protectively enclosed within cylindrical shrouding which forms an axial flow passage about the exhaust channel of the propulsion unit through which flow of the fluid medium is induced by rotation of impeller blades. Inflow of the fluid medium to the flow passage is modified at an inlet end of the shrouding by a plurality of angularly spaced vanes attached thereto and extending forwardly therefrom at an angle.

摘要翻译： 用于船用工艺等的周围流体介质内的泵喷式舷外推进单元被保护地封闭在圆柱形罩内，其围绕推进单元的排气通道形成轴向流动通道，通过该轴流动通道引导流体介质的流动 通过叶轮的旋转。 流体介质流入流道的过程在罩的入口端被多个与其连接并且以一定角度向前延伸的角度间隔的叶片进行改变。

公开(公告)号：US06991499B2

公开(公告)日：2006-01-31

申请号：US10664318

申请日：2003-09-16

申请人： William Facinelli ,  Alan J. Becnel ,  John G. Purnell

发明人： William Facinelli ,  Alan J. Becnel ,  John G. Purnell

IPC分类号： B63H11/103

CPC分类号： B63H11/08 ,  B63H2011/081

摘要： A waterjet propulsion apparatus having a five blade rotor and an eight blade stator that are located within housing sections that define a water flowpath. The housing and hub are designed such that in operation a nonuniform loading arises on the rotor blades whereby greater pressure impinges on the tip area of the rotor blade than at the hub area of the rotor blade. This configuration increases the efficiency of the waterjet while minimizing negative effects of cavitation.

摘要翻译： 一种具有五个叶片转子和八个叶片定子的水射流推进装置，其位于限定水流径的壳体部分内。 壳体和轮毂被设计成使得在操作中在转子叶片上产生不均匀的载荷，由此更大的压力撞击在转子叶片的尖端区域上而不是转子叶片的轮毂区域。 这种配置提高了水射流的效率，同时使气蚀的负面影响最小化。

公开(公告)号：US06059618A

公开(公告)日：2000-05-09

申请号：US207518

申请日：1998-12-09

申请人： John G. Purnell ,  Alan J. Becnel

发明人： John G. Purnell ,  Alan J. Becnel

IPC分类号： B63H20/34 ,  F02B61/04 ,  B63H11/00

CPC分类号： B63H20/34 ,  F02B61/045

摘要： The invention features a unique surface configuration which fosters atmosric ventilation and thereby uncomplicatedly reduces drag which is normally associated with implementation of shrouding for a marine impeller. Typical inventive embodiments include a blunt trailing edge and a circumferentially stepped impeller shroud (below the blunt trailing edge), the harmonious union of which affords a generally smooth and unbroken surface which encourages drag-defeating air circulation. During marine navigation, circulation of the air generally describes a path wherein the air first travels linearly downward along the blunt trailing edge, then travels curvingly downward (both clockwise and counterclockwise) along the circumferential step, forming a circumferential air pocket which extends a backward distance increasing in accordance with increasing navigational speed; upon attainment of a threshold navigational speed, the air pocket (virtually) completely surrounds the shroud. According to the invention, many a conventional outboard open propeller assembly can be facilely converted to an inventive outboard shrouded impeller assembly which produces equal or superior performance.

摘要翻译： 本发明具有独特的表面构造，其促进大气通风，从而不会简单地减少通常与执行海洋叶轮罩罩相关的阻力。 典型的发明实施例包括钝的后缘和周向阶梯式叶轮护罩（在钝的后缘下方），其和谐结合提供了大致平滑且不间断的表面，其鼓励阻止空气循环。 在海洋导航期间，空气的循环通常描述了一种路径，其中空气首先沿着钝的后缘线性向下行进，然后沿圆周步骤弯曲地向下（沿顺时针和逆时针方向）行进，形成周向空气袋， 随着航行速度的增加而增加; 在达到阈值导航速度后，气囊（虚拟地）完全围绕护罩。 根据本发明，许多常规的外侧开放螺旋桨组件可以容易地转换成产生相同或优异性能的本发明的外侧带盖的叶轮组件。