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102 条记录 (耗时 0.012 秒)

    Centrifugal pump with inner and outer casings
    51.
    发明授权
    Centrifugal pump with inner and outer casings 失效
    离心泵与内外箱

    公开(公告)号：US5114311A

    公开(公告)日：1992-05-19

    申请号：US658172

    申请日：1991-02-20

    申请人： Karlheinz Becker ,  Gunter Pfeiffer-Muller

    发明人： Karlheinz Becker ,  Gunter Pfeiffer-Muller

    IPC分类号： F04D11/00 ,  F04D29/42 ,  F04D29/44 ,  F04D29/52

    CPC分类号： F04D29/428 ,  F04D29/445

    摘要： A centrifugal pump with an outer casing which has one or more discharge branches, with an inner casing which is installed in the outer casing and rotatably surrounds a pump shaft, and an impeller which is mounted on the shaft at the inlet of the outer casing has one or more fluid flow guiding inserts, one for each discharge branch, in an annular chamber between the inner and outer casings. The inserts are offset relative to the respective discharge branches in the direction of rotation of the shaft and have front faces provided on spur-shaped front portions immediately behind the exit end of the impeller. The inserts further have guide surfaces including first sections adjacent the inner casing, second sections adjacent the outer casing, and third sections which direct a portion of the fluid medium directly from the exit end of the impeller to the corresponding discharge branches. The guide surfaces establish for the fluid medium a path which resembles that defined by the thread on a shank forming part of a screw and having a diameter which increases in a direction from the exit end of the impeller toward the discharge branches of the other casing.

    摘要翻译： 一种具有外壳的离心泵，其具有一个或多个排出分支，其内壳安装在外壳中并且可旋转地围绕泵轴，并且在外壳的入口处安装在轴上的叶轮具有 一个或多个流体引导插入件，一个用于每个排出分支，位于内壳体和外壳体之间的环形室中。 插入件相对于轴的旋转方向上的相应排出分支偏移，并且具有在叶轮的出口端后面的正齿形前部上设置的前表面。 插入件还具有引导表面，其包括邻近内壳的第一部分，与外壳相邻的第二部分，以及将流体介质的一部分直接从叶轮的出口端引导到相应的排出分支的第三部分。 引导表面为流体介质建立类似于由形成螺杆的一部分的柄上的螺纹限定的路径，并且具有在从叶轮的出口端朝向另一个壳体的排出分支的方向上增加的直径。

    Centrifugal pump having low flow diffuser
    53.
    发明授权
    Centrifugal pump having low flow diffuser 失效
    离心泵具有低流量扩散器

    公开(公告)号：US4629394A

    公开(公告)日：1986-12-16

    申请号：US516848

    申请日：1983-07-25

    申请人： Frank A. Leachman, Jr.

    发明人： Frank A. Leachman, Jr.

    IPC分类号： F04D29/44 ,  F04D15/00 ,  F04D27/00

    CPC分类号： F04D29/445 ,  F04D29/428

    摘要： A centrifugal main fuel pump (10') for a gas turbine engine has a housing (18') in which a centrifugal impeller (12') is mounted for rotation. The impeller discharges flow to a collector (20') and diffuser (22'). A low flow diffuser (26) has its inlet opening positioned closely adjacent the outer periphery of the impeller. Proper design and placement of the low flow diffuser ensures that a high percentage of the fluid energy available in the high velocity flow adjacent the impeller outer periphery is recovered as pressure rise. The low flow diffuser produces adequate fuel flow at the pressure necessary for engine light-off while the first mentioned diffuser recovers a lower pressure rise but is adapted to supply higher engine fuel flow demand in the normal range of operation. A check valve (34) prevents flow from the low flow diffuser from returning to the impeller. The check valve opens to allow the first mentioned diffuser to supply fuel when its discharge pressure exceeds that of the low flow diffuser. The addition of the low flow diffuser to the centrifugal pump results in minimal additional parasitic power loss, cost and complexity.

    摘要翻译： 用于燃气涡轮发动机的离心式主燃料泵（10'）具有壳体（18'），其中安装有用于旋转的离心式叶轮（12'）。 叶轮将流体排放到收集器（20'）和扩散器（22'）。 低流量扩散器（26）的入口开口紧邻叶轮的外周。 低流量扩散器的正确设计和布置确保了在靠近叶轮外周边的高速流动中可用的高百分比的流体能量随压力升高而恢复。 低流量扩散器在发动机关闭所需的压力下产生足够的燃料流量，而第一个提及的扩压器恢复较低的压力上升，但适于在正常操作范围内提供更高的发动机燃料流量需求。 止回阀（34）防止来自低流量扩散器的流量返回到叶轮。 止回阀打开以允许首先提到的扩压器当其排出压力超过低流量扩散器的排出压力时供应燃料。 将低流量扩散器添加到离心泵中导致最小的额外的寄生功率损耗，成本和复杂性。

    Centrifugal pump
    54.
    发明授权
    Centrifugal pump 失效
    离心泵

    公开(公告)号：US3967915A

    公开(公告)日：1976-07-06

    申请号：US541492

    申请日：1975-01-27

    申请人： David P. Litzenberg

    发明人： David P. Litzenberg

    IPC分类号： F04D13/06 ,  F04D29/42 ,  F04D29/44

    CPC分类号： F04D29/428 ,  F04D13/0606 ,  F04D29/426 ,  F04D29/4266 ,  Y10S415/912

    摘要： A centrifugal pump is described having an improved and simplified construction of pump casing and impeller with easy adaptability of the components over a wide range of capacity, the pump casing preferably being of stamped sheet metal with welded inlet and outlet connections, preferably of pipe of selected sizes, the pump casing preferably being of circular, as opposed to volute, shape in transverse cross section and with an inserted cut water tongue or plate capable of ready accommodation in shape to different impellers for different selected heads or viscosities so that each size of casing can be employed over a wide range of inputs and of delivered heads or volumes.

    摘要翻译： 描述了一种离心泵，其具有改进和简化的泵壳体和叶轮的结构，并且在宽范围的容积范围内容易地适应部件，泵壳体优选地具有焊接的入口和出口连接的冲压金属板，优选地具有选定管道 尺寸，泵壳体优选地为圆形，与蜗壳相反，横截面形状，并且具有插入的切割水舌或板，其能够适应不同叶片的不同叶片或粘度的不同叶轮，使得每个尺寸的套管 可以在广泛的投入和交付的头部或体积上使用。

    Volute Design For Lower Manufacturing Cost and Radial Load Reduction
    57.
    发明公开
    Volute Design For Lower Manufacturing Cost and Radial Load Reduction 审中-公开

    公开(公告)号：US20230235751A1

    公开(公告)日：2023-07-27

    申请号：US18097645

    申请日：2023-01-17

    申请人： Fluid Handling LLC

    发明人： Paul J. Ruzicka

    IPC分类号： F04D29/44 ,  F04D29/42

    CPC分类号： F04D29/445 ,  F04D29/428

    摘要： A volute for a pump featuring a volute or casing having a pump inlet for receiving a fluid being pumped, a pump discharge for providing the fluid, and a volute or casing vane forming double volutes therein. The volute has an upper cutwater farthest from the pump discharge defining an upper cutwater throat area and an end of passage for the upper cutwater, and also has a lower cutwater closest to the pump discharge defining a lower cutwater throat and a corresponding end of passage for the lower cutwater. The upper cutwater throat area is dimensioned to be greater than and not equal to the lower cutwater throat area so the upper cutwater throat area and the lower cutwater throat area provide substantially equal flow velocity at both the upper cutwater and the lower cutwater in response to an angular sweep of the fluid being pumped. The end of passage for the upper cutwater is dimensioned with an upper cutwater passage area that is greater than and not equal to a corresponding lower cutwater passage area of the corresponding end of passage for the lower cutwater so that upper and lower cutwater passage areas at the pump discharge are balanced as a function of differing rates of flow of the fluid being pumped therein and so that the fluid being pumped from associated ends of the upper and lower cutwater passage areas meets at the pump discharge with a substantially equal velocity.

    VOLUTE CASING FOR A CENTRIFUGAL PUMP AND CENTRIFUGAL PUMP
    58.
    发明申请
    VOLUTE CASING FOR A CENTRIFUGAL PUMP AND CENTRIFUGAL PUMP 审中-公开

    公开(公告)号：US20180328380A1

    公开(公告)日：2018-11-15

    申请号：US15956186

    申请日：2018-04-18

    申请人： Sulzer Management AG

    发明人： Bruno MAROCCIA

    IPC分类号： F04D29/42 ,  F04D29/44 ,  F04D29/66

    CPC分类号： F04D29/428 ,  F04D1/00 ,  F04D29/422 ,  F04D29/669

    摘要： A volute casing includes a chamber, an outlet passage, and a cutwater to direct fluid to the outlet passage. The cutwater includes an inner surface, an outer surface and a leading edge joining the inner and outer surfaces and has a cross-sectional contour in a midplane perpendicular to the axial direction. The cross-sectional contour includes a starting point at the leading edge, and a minimum point on the inner surface, the starting point defined by a tangent to the leading edge, the tangent intersecting the central axis, and the minimum point defined by a location, at which the inner surface has a minimum distance from the central axis. A straight profile chord located in the cross-sectional contour, and extending from the cutwater starting point to the cutwater minimum point, has a maximum orthogonal distance from the inner surface being at most 15% of the length of the profile chord.