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公开(公告)号：US5234317A
公开(公告)日：1993-08-10
申请号：US811067
申请日：1991-12-20
申请人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
发明人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
CPC分类号： F04D29/4266 , F04D1/063
摘要： A multistage centrifugal pump has a plurality of series-connected interstage casings of pressed sheet steel housing respective impellers. Each of the interstage casings includes a central cylindrical side wall, a casing end wall, a first cylindrical wall integrally extending from an end of the central cylindrical side wall and joined to the casing end wall, the first cylindrical wall serving as a male member of a spigot joint, and a second cylindrical wall integrally extending from an opposite end of the central cylindrical side wall and having a flange defining an end opening therein, the second cylindrical wall serving as a female member of a spigot joint. The central cylindrical side wall has an outside diameter larger than outside diameters of the first cylindrical wall and the flange. The interstage casing is formed by drawing and bulging, and is not machined to achieve the desired dimensional accuracy. Therefore, the interstage casing is free from deformations and dimensional errors which would otherwise tend to occur under forces that would be developed if the blank were fastened for machining, and stresses and heat that would be developed if the blank were machined.
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2.发明授权Interstage casing for a pump made of sheet metal and method of manufacturing the same 失效用于由金属板制成的泵的级间套管及其制造方法
公开(公告)号：US5369972A
公开(公告)日：1994-12-06
申请号：US112659
申请日：1993-08-27
申请人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
发明人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
CPC分类号： F04D29/4266 , F04D1/063
摘要： An interstage casing made of sheet metal includes a cylindrical receptacle-like body having a casing end wall on an end thereof and an open end opposite to The end. The omen end has an axial end surface and a radially inner surface which serve as a member of a spigot joint to be joined to the next interstage casing. The cylindrical receptacle-like body also includes a cylindrical side wall, a cylindrical portion joined between the casing end wall and the cylindrical side wall and having an outside diameter slightly smaller than an inside diameter of the open end, and a flat portion joined to the recessed portion and serving as an end surface of the casing end wall. The flat portion is adapted to be engageable with the end surface of the open end of an adjacent interstage casing. The flat portion has an outside diameter slightly larger than an outside diameter of the open end. The interstage casing further includes a recessed portion joined to The cylindrical portion and smaller in diameter than the cylindrical portion. The recessed portion provides a space for installing an O-ring therein.
摘要翻译： 由金属板制成的级间壳体包括圆柱形容器体，其端部具有壳体端壁和与端部相对的开口端。 所述端部具有轴向端面和径向内表面，所述径向内表面用作待接合到下一层间壳体的插口接头的构件。 圆柱形容器体还包括圆柱形侧壁，连接在壳体端壁和圆柱形侧壁之间的圆柱形部分，其外径略小于开口端的内径，以及平坦部分 凹陷部分并且用作壳体端壁的端表面。 平坦部适于与相邻级间壳体的开口端的端面接合。 平坦部分的外径略大于开口端的外径。 级间壳体还包括连接到圆柱形部分并且直径小于圆柱形部分的凹部。 凹陷部分提供了一个用于在其中安装O形环的空间。
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公开(公告)号：US5344678A
公开(公告)日：1994-09-06
申请号：US811071
申请日：1991-12-20
申请人： Ken-ichi Kajiwara , Kikuichi Mori
发明人： Ken-ichi Kajiwara , Kikuichi Mori
CPC分类号： F04D29/0465 , F04D1/063 , F04D29/4266 , Y10T428/131 , Y10T428/1317 , Y10T428/1321 , Y10T428/1386 , Y10T428/1393 , Y10T428/31826
摘要： A shaft sleeve is made of ceramics and provided in confrontation with a stationary sliding member in a sliding bearing or plain bearing. The shaft sleeve made of ceramics comprises a cylindrical body made of ceramics and having a circular outer surface and a circular inner surface, and an elastic member molded on the inner surface of the cylindrical body and being formed with an inner opening having a shape corresponding to the cross section of a shaft. The shaft sleeve is usable under high temperature conditions and with liquids containing much slurry such as, for example, as a shaft sleeve of a pump.
摘要翻译： 轴套由陶瓷制成，并与滑动轴承或滑动轴承中的固定滑动构件对抗。 由陶瓷制成的轴套包括由陶瓷制成的圆筒体，其具有圆形外表面和圆形内表面，并且弹性构件模制在圆柱体的内表面上，并且形成有具有对应于 轴的横截面。 轴套可在高温条件下使用，并且液体含有很多浆料，例如作为泵的轴套。
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4.发明授权Interstage casing for a pump made of sheet metal and method of manufacturing the same 失效用于由金属板制成的泵的级间套管及其制造方法
公开(公告)号：US5318403A
公开(公告)日：1994-06-07
申请号：US811069
申请日：1991-12-20
申请人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
发明人： Ken-ichi Kajiwara , Sou Kuroiwa , Kikuichi Mori , Hideo Ikeda
CPC分类号： F04D29/4266 , F04D1/063
摘要： An interstage casing made of sheet metal includes a cylindrical receptacle-like body having a casing end wall on an end thereof and an open end opposite to the end. The open end has an axial end surface and a radially inner surface which serve as a member of a spigot joint to be joined to the next interstage casing. The cylindrical receptacle-like body also includes a cylindrical side wall, a cylindrical portion joined between the casing end wall and the cylindrical side wall and having an outside diameter slightly smaller than an inside diameter of the open end, and a flat portion joined to the recessed portion and serving as an end surface of the casing end wall. The flat portion is adapted to be engageable with the end surface of the open end of an adjacent interstage casing. The flat portion has an outside diameter slightly larger than an outside diameter of the open end. The interstage casing further includes a recessed portion joined to the cylindrical portion and smaller in diameter than the cylindrical portion. The recessed portion provides a space for installing an O-ring therein.
摘要翻译： 由金属板制成的级间壳体包括圆柱形容器体，其端部具有壳体端壁和与端部相对的开口端。 开口端具有轴向端面和径向内表面，其用作接头连接到下一层间壳体的插口接头的构件。 圆柱形容器体还包括圆柱形侧壁，连接在壳体端壁和圆柱形侧壁之间的圆柱形部分，其外径略小于开口端的内径，以及平坦部分 凹陷部分并且用作壳体端壁的端表面。 平坦部适于与相邻级间壳体的开口端的端面接合。 平坦部分的外径略大于开口端的外径。 级间壳体还包括接合到圆柱形部分的凹部，并且直径小于圆柱形部分。 凹陷部分提供了一个用于在其中安装O形环的空间。
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公开(公告)号：US5256033A
公开(公告)日：1993-10-26
申请号：US811068
申请日：1991-12-20
申请人： Ken-ichi Kajiwara
发明人： Ken-ichi Kajiwara
CPC分类号： F04D29/0465 , F04D1/063 , F04D29/4266 , Y10T428/131 , Y10T428/1317 , Y10T428/1321 , Y10T428/1386 , Y10T428/1393 , Y10T428/31826
摘要： A multistage centrifugal pump has a plurality of series-connected interstage casings of pressed sheet metal housing respective impellers. Each of the interstage casings includes a cylindrical side wall for housing an impeller, a bottom wall joined to the cylindrical side wall and extending around an inlet for the impeller, and a return blade attached to the bottom wall remotely from the impeller. The bottom wall has a central region projecting conically or spherically radially inwardly toward the impeller by a distance corresponding to the extent to which the bottom wall is deformable under an interstage pressure difference. The deformation of the bottom wall that is developed under the pressure generated by the impeller is borne only by the casing body itself without affecting the welded spots, which are prevented from being ripped off under stresses that would otherwise concentrate on the welded spots.
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公开(公告)号：US5295786A
公开(公告)日：1994-03-22
申请号：US811070
申请日：1991-12-20
申请人： Ken-ichi Kajiwara
发明人： Ken-ichi Kajiwara
CPC分类号： F04D29/167
摘要： A liner ring for a pump is provided between a pump casing and an impeller to check counterflow therebetween. The liner ring comprises a housing provided on a casing body, an annular sealing member provided in the housing in such a manner that a predetermined gap is provided in a radial direction between the sealing member and an impeller, and an elastic member provided between the sealing member and the housing. In accordance with the present invention, the sealing member is housed in the housing made of sheet metal in such a manner that a predetermined gap is provided between the sliding member and the housing. The gap corresponds to the variation in dimensions due to the difference in thermal expansion coefficients of the sealing member and the housing. The gap is sealed by the elastic member provided between the sealing member and the housing.
摘要翻译： 在泵壳体和叶轮之间设置用于泵的衬套环，以检查它们之间的逆流。 衬套环包括设置在壳体上的壳体，设置在壳体中的环形密封构件，使得在密封构件和叶轮之间沿径向设置预定间隙，并且弹性构件设置在密封件 会员和住房。 根据本发明，密封构件被容纳在由金属板制成的壳体中，使得在滑动构件和壳体之间设置预定的间隙。 由于密封构件和壳体的热膨胀系数的差异，间隙对应于尺寸的变化。 间隙由设置在密封构件和壳体之间的弹性构件密封。
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