公开(公告)号：US6039535A

公开(公告)日：2000-03-21

申请号：US102562

申请日：1998-06-23

申请人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

发明人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

IPC分类号： F04D29/10 ,  F04D29/16 ,  F16J15/447 ,  F04D29/08

CPC分类号： F04D29/102 ,  F04D29/106 ,  F04D29/162 ,  F04D29/167

摘要： In a fluid machine such as multistage centrifugal compressor, the pressure of a working fluid is raised with the rotation of a impeller. A shaft sealing device is mounted at the end of the rotary shaft in order to prevent the working gas of the raised pressure from leaking out of the fluid machine and then polluting the surroundings. In a case where the fluid machine operates to rotate at high speed, a labyrinth sealing device is employed for the purpose of reducing a frictional loss in the shaft sealing device. The labyrinth sealing device includes a plurality of stages of labyrinth fins which are formed on a casing or the rotary shaft, and a layer of abradable coating to-be-bitten which is formed in the surface part of the rotary shaft or the casing opposing to the labyrinth fins. The clearances between the labyrinth fins and the rotary shaft or the casing are made narrower on the low-pressure side of the labyrinth sealing device than on the high-pressure side thereof. Thus, the fluid machine is run with the minimum clearance. Moreover, even when the coating layer has been lost in contacting the labyrinth fin or by peeling off, the labyrinth fin on the low-pressure side acts as a labyrinth seal.

摘要翻译： 在诸如多级离心压缩机的流体机器中，随着叶轮的旋转，工作流体的压力升高。 轴密封装置安装在旋转轴的端部，以防止升高的压力的工作气体从流体机器泄漏，然后污染周围环境。 在流体机械高速旋转的情况下，为了减少轴封装置的摩擦损失，采用迷宫式密封装置。 迷宫式密封装置包括形成在壳体或旋转轴上的多级迷宫式散热片和形成在旋转轴的表面部分或与壳体相对的壳体上的可磨损涂层层 迷宫鳍。 迷宫式散热片与旋转轴或壳体之间的间隙在迷宫型密封装置的低压侧比在其高压侧更窄。 因此，流体机器以最小间隙运行。 此外，即使当涂层在迷宫式翅片接触或者剥离时已经失去了，低压侧的迷宫式翼片也作为迷宫式密封。

公开(公告)号：US06435822B1

公开(公告)日：2002-08-20

申请号：US09864148

申请日：2001-05-25

申请人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

发明人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

IPC分类号： F04D2908

CPC分类号： F04D29/102 ,  F04D29/106 ,  F04D29/162 ,  F04D29/167

摘要： In a fluid machine such as multistage centrifugal compressor, the pressure of a working fluid is raised with the rotation of a impeller. A shaft sealing device is mounted at the end of the rotary shaft in order to prevent the working gas of the raised pressure from leaking out of the fluid machine and then polluting the surroundings. In a case where the fluid machine operates to rotate at high speed, a labyrinth sealing device is employed for the purpose of reducing a frictional loss in the shaft sealing device. The labyrinth sealing device includes a plurality of stages of labyrinth fins which are formed on a casing or the rotary shaft, and a layer of abradable coating to-be-bitten which is formed in the surface part of the rotary shaft or the casing opposing to the labyrinth fins. The clearances between the labyrinth fins and the rotary shaft or the casing are made narrower on the low-pressure side of the labyrinth sealing device than on the high-pressure side thereof. Thus, the fluid machine is run with the minimum clearance. Moreover, even when the coating layer has been lost in touch with the labyrinth fin or by peeling off, the labyrinth fin on the low-pressure side acts as a labyrinth seal.

摘要翻译： 在诸如多级离心压缩机的流体机器中，随着叶轮的旋转，工作流体的压力升高。 轴密封装置安装在旋转轴的端部，以防止升高的压力的工作气体从流体机器泄漏，然后污染周围环境。 在流体机械高速旋转的情况下，为了减少轴封装置的摩擦损失，采用迷宫式密封装置。 迷宫式密封装置包括形成在壳体或旋转轴上的多级迷宫式散热片和形成在旋转轴的表面部分或与壳体相对的壳体上的可磨损涂层层 迷宫鳍。 迷宫式散热片与旋转轴或壳体之间的间隙在迷宫型密封装置的低压侧比在其高压侧更窄。 因此，流体机器以最小间隙运行。 此外，即使当涂层与迷宫式翅片相接触或剥离时，低压侧的迷宫式翼片也作为迷宫式密封件。

公开(公告)号：US06302645B1

公开(公告)日：2001-10-16

申请号：US09505191

申请日：2000-02-16

申请人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

发明人： Hiromi Kobayashi ,  Hideo Nishida ,  Haruo Miura ,  Takashi Eino ,  Kazuki Takahashi

IPC分类号： F04D2908

CPC分类号： F04D29/102 ,  F04D29/106 ,  F04D29/162 ,  F04D29/167

摘要： In a fluid machine such as multistage centrifugal compressor, the pressure of a working fluid is raised with the rotation of a impeller. A shaft sealing device is mounted at the end of the rotary shaft in order to prevent the working gas of the raised pressure from leaking out of the fluid machine and then polluting the surroundings. In a case where the fluid machine operates to rotate at high speed, a labyrinth sealing device is employed for the purpose of reducing a frictional loss in the shaft sealing device. The labyrinth sealing device includes a plurality of stages of labyrinth fins which are formed on a casing or the rotary shaft, and a layer of abradable coating to-be-bitten which is formed in the surface part of the rotary shaft or the casing opposing to the labyrinth fins. The clearances between the labyrinth fins and the rotary shaft or the casing are made narrower on the low-pressure side of the labyrinth sealing device than on the high-pressure side thereof. Thus, the fluid machine is run with the minimum clearance. Moreover, even when the coating layer has been lost in touch with the labyrinth fin or by peeling off, the labyrinth fin on the low-pressure side acts as a labyrinth seal.

摘要翻译： 在诸如多级离心压缩机的流体机器中，随着叶轮的旋转，工作流体的压力升高。 轴密封装置安装在旋转轴的端部，以防止升高的压力的工作气体从流体机器泄漏，然后污染周围环境。 在流体机械高速旋转的情况下，为了减少轴封装置的摩擦损失，采用迷宫式密封装置。 迷宫式密封装置包括形成在壳体或旋转轴上的多级迷宫式散热片和形成在旋转轴的表面部分或与壳体相对的壳体上的可磨损涂层层 迷宫鳍。 迷宫式散热片与旋转轴或壳体之间的间隙在迷宫型密封装置的低压侧比在其高压侧更窄。 因此，流体机器以最小间隙运行。 此外，即使当涂层与迷宫式翅片相接触或剥离时，低压侧的迷宫式翼片也作为迷宫式密封件。

公开(公告)号：US06203275B1

公开(公告)日：2001-03-20

申请号：US09142013

申请日：1998-08-31

申请人： Hiromi Kobayashi ,  Hideo Nishida ,  Kazuki Takahashi ,  Takashi Eino

发明人： Hiromi Kobayashi ,  Hideo Nishida ,  Kazuki Takahashi ,  Takashi Eino

IPC分类号： F04D2944

CPC分类号： F04D29/444 ,  F04D17/122

摘要： In a multi-stage centrifugal compressor, having a plurality of impellers mounted on a rotation shaft, or a single-stage centrifugal compressor, a vaned diffuser, having a plurality of vanes, is mounted at a downstream side of the impeller, and a vaneless diffuser portion is formed downstream of this vaned diffuser. A meridian plane cross-sectional shape of each of two wall surfaces forming the vaneless diffuser portion provided downstream of the vaned diffuser is such that its channel height is decreased progressively in a downstream direction. Instead of this vaneless diffuser, there can be provided a second vaned diffuser having a small number of vanes. In this case, also, two wall surfaces, forming the second vaned diffuser, are contracted progressively in the downstream direction.

摘要翻译： 在具有安装在旋转轴上的多个叶轮或单级离心式压缩机的多级离心压缩机中，具有多个叶片的叶片式扩散器安装在叶轮的下游侧，并且无叶 扩散器部分形成在该扩散器的下游。 形成设在叶片扩散器下游的无叶漫射器部分的两个壁面中的每一个的子午线截面形状使得其通道高度沿下游方向逐渐减小。 代替这种无叶漫射器，可以提供具有少量叶片的第二扇形扩散器。 在这种情况下，形成第二叶片式扩散器的两个壁面也在下游方向逐渐收缩。

公开(公告)号：US06340287B1

公开(公告)日：2002-01-22

申请号：US08597995

申请日：1996-02-07

申请人： Takashi Eino

发明人： Takashi Eino

IPC分类号： F04D2944

CPC分类号： F04D29/286 ,  F04D17/125 ,  F04D29/2222 ,  F04D29/30

摘要： By changing a vane height to produce different vanes from master vanes, different impellers are produced, and therefore there can be obtained an inexpensive and high-reliability multistage centrifugal compressor and an impellers therefor. An impeller for multistage centrifugal compressor, which is to be mounted on a rotary shaft, comprises a plurality of vanes disposed between a disk and a shroud and separated from one another equiangularly. By changing the vanes of the impeller only in height without changing the configuration, vanes can be obtained, and then a different impeller comprising the disk, a shroud and vanes is also obtained. Since a whole of the vane has a configuration identical to a part of the vane, these vane can be produced by a single pair of the pressing dies.

摘要翻译： 通过改变叶片高度以从主叶片产生不同的叶片，产生不同的叶轮，因此可以获得廉价且高可靠性的多级离心压缩机及其叶轮。 要安装在旋转轴上的用于多级离心式压缩机的叶轮包括多个叶片，其设置在圆盘和护罩之间并且等角地彼此分离。 通过仅改变叶轮的叶片而不改变构造，可以获得叶片，然后也获得包括盘，护罩和叶片的不同叶轮。 由于整个叶片具有与叶片的一部分相同的构造，所以这些叶片可以通过一对压模生产。