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    SHAFT SEALING MECHANISM
    1.
    发明申请
    SHAFT SEALING MECHANISM 审中-公开

    公开(公告)号：US20170350267A1

    公开(公告)日：2017-12-07

    申请号：US15536369

    申请日：2015-12-15

    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

    Inventor： Kohei OZAKI ,  Azumi YOSHIDA ,  Hidekazu UEHARA ,  Tanehiro SHINOHARA ,  Hiroharu OYAMA

    IPC: F01D11/02 ,  F16J15/22 ,  F02C7/28

    CPC classification number: F01D11/025 ,  F01D11/001 ,  F02C7/28 ,  F05D2240/57 ,  F05D2240/59 ,  F16J15/22 ,  F16J15/3284 ,  F16J15/3292

    Abstract: A shaft sealing mechanism (11) that partitions an annular space (14) that is formed between a fixed part (12) and a rotating shaft (13) into a high-pressure-side region and a low-pressure-side region, that obstructs the flow of a fluid (G), and that is provided with: a plurality of annularly laminated thin-plate seal pieces (22) that are fixed to an annular seal housing (21) that is provided to the fixed part and are in sliding contact with the rotating shaft; and an annular low-pressure-side plate (26) that is sandwiched and held such that a low-pressure-side gap (δL) is formed between the seal housing and a low-pressure-side side edge part (22d) of the thin-plate seal pieces. The thin-plate seal pieces have a thick part (31) that is formed further to the inside in the radial direction of the rotating shaft than an inner-circumferential-side tip part (26a) of the low-pressure-side plate.

    SEAL STRUCTURE AND ROTATING MACHINE
    2.
    发明申请
    SEAL STRUCTURE AND ROTATING MACHINE 审中-公开
    密封结构和旋转机

    公开(公告)号：US20160341058A1

    公开(公告)日：2016-11-24

    申请号：US15106935

    申请日：2015-01-29

    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

    Inventor： Toyoharu NISHIKAWA ,  Yoshihiro KUWAMURA ,  Hiroharu OYAMA ,  Yoshinori TANAKA ,  Shin NISHIMOTO ,  Kazuyuki MATSUMOTO ,  Hidekazu UEHARA

    IPC: F01D11/04 ,  F01D5/02 ,  F01D11/00 ,  F01D9/02

    CPC classification number: F01D11/02 ,  F01D5/225 ,  F01D9/02 ,  F01D11/001 ,  F01D11/08 ,  F05D2220/31 ,  F05D2250/75 ,  F16J15/44 ,  F16J15/4472

    Abstract: A seal structure (2) for sealing a gap between a first structure body (10) and a second structure body (51). The seal structure includes: a peripheral surface formed on one of the first structure body and the second structure body; a plurality of seal fins (5) provided at intervals in the axial direction so as to form clearances (m) together with the peripheral surface and protrusions that form re-adhesion edges between pairs of axially adjacent seal fins; the re-adhesion edges being locations at which leak currents (SL) re-adhere that have passed through a clearance (mA) of an upstream seal fin; and the protrusions forming first cavities in which eddies (B1) are created that flow along the upstream seal fin toward the second structure body, and second cavities in which currents (B2) are created that cause a contraction current effect on a clearance (mB) of a downstream seal fin.

    Abstract translation: 一种用于密封第一结构体（10）和第二结构体（51）之间的间隙的密封结构（2）。 密封结构包括：形成在第一结构体和第二结构体之一上的周边表面; 多个密封翅片（5），其沿轴向间隔设置，以便形成间隙（m）以及周边表面和凸起，所述周边表面和凸起在成对的轴向相邻密封片之间形成再粘合边缘; 再粘合边缘是通过上游密封翅片的间隙（mA）的泄漏电流（SL）重新粘附的位置; 并且所述突起形成第一空腔，其中产生沿所述上游密封翅片朝向所述第二结构体流动的涡流（B1），以及其中产生电流（B2）的第二腔，所述第二腔引起收缩电流对间隙（mB）的影响， 的下游密封翅片。

    CASING POSITION ADJUSTMENT DEVICE
    3.
    发明申请
    CASING POSITION ADJUSTMENT DEVICE 审中-公开

    公开(公告)号：US20190093514A1

    公开(公告)日：2019-03-28

    申请号：US16089049

    申请日：2017-02-28

    Applicant: Mitsubishi Hitachi Power Systems, Ltd.

    Inventor： Takumi HORI ,  Hidekazu UEHARA ,  Kentarou SAEKI ,  Katsuhisa HAMADA

    IPC: F01D25/26 ,  F01D25/28 ,  F01D25/16 ,  F01D19/00

    Abstract: In a steam turbine including a rotor including a free side end fixed by a journal bearing (not illustrated) in a radial direction and a fixed side end fixed by a thrust bearing in an axial direction, and a casing including a fixed side end fixed by the thrust bearing in the axial direction (rotor axial direction), a casing position adjustment device is configured to adjust an axial position of the casing with respect to the rotor due to thermal expansion. The casing position adjustment device includes: a low-pressure casing end plate, which is an end plate oriented to a free side in the axial direction in a low-pressure casing of the casing, and has a diaphragm shape deformable in the axial direction; and actuators, which deform the low-pressure casing end plate so that the low-pressure casing end plate extends toward the free side in the axial direction.

    SEAL STRUCTURE AND ROTARY MACHINE
    4.
    发明申请
    SEAL STRUCTURE AND ROTARY MACHINE 审中-公开
    密封结构和旋转机

    公开(公告)号：US20170022838A1

    公开(公告)日：2017-01-26

    申请号：US15039580

    申请日：2014-11-26

    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

    Inventor： Yoshihiro KUWAMURA ,  Kazuyuki MATSUMOTO ,  Hiroharu OYAMA ,  Yoshinori TANAKA ,  Toyoharu NISHIKAWA ,  Hidekazu UEHARA ,  Shin NISHIMOTO

    IPC: F01D11/02 ,  F01D11/08 ,  F16J15/447 ,  F01D5/12

    CPC classification number: F01D11/02 ,  F01D5/12 ,  F01D5/225 ,  F01D11/08 ,  F05D2220/31 ,  F05D2220/32 ,  F16J15/4472

    Abstract: In a seal structure that seals a gap between a first structure and a second structure which faces the first structure in a radial direction and rotates relative to the first structure, one of the first structure and the second structure has a base surface and a step surface that protrudes toward the other side from the base surface, and the other is provided with: a first fin which extends toward the step surface and forms a first gap between the step surface; a second fin that, on the downstream side of the first fin, extends toward the base surface and forms a second gap between the base surface; and a protrusion part that is disposed between the first fin and the second fin and that divides a leak flow, into a first vortex along the first fin and a second vortex along the second fin.

    Abstract translation: 在密封结构中，密封第一结构和第二结构之间的间隙，第一结构和第二结构在径向方向上面对第一结构并相对于第一结构旋转，第一结构和第二结构中的一个具有基部表面和台阶表面 另一方面设置有：朝向台阶面延伸并在台阶面之间形成第一间隙的第一翅片; 在所述第一翅片的下游侧朝向所述基面延伸并在所述基面之间形成第二间隙的第二翅片; 以及突出部，其设置在所述第一翅片和所述第二翅片之间并且将所述泄漏流分成沿着所述第一翅片的第一涡流和沿着所述第二翅片的第二涡流。

    SEAL SEGMENT AND ROTARY MACHINE
    6.
    发明申请
    SEAL SEGMENT AND ROTARY MACHINE 审中-公开

    公开(公告)号：US20190136766A1

    公开(公告)日：2019-05-09

    申请号：US16096885

    申请日：2017-05-02

    Applicant: Mitsubishi Hitachi Power Systems, Ltd. ,  Eagle Industry Co., Ltd.

    Inventor： Azumi YOSHIDA ,  Hidekazu UEHARA ,  Shin NISHIMOTO ,  Naoya TATSUMI ,  Kohei OZAKI ,  Toru KONO ,  Ryu KIKUCHI

    IPC: F02C7/28 ,  F04D29/10

    Abstract: A seal segment includes a retainer extending in a circumferential direction of a rotary shaft on an outer circumferential side of the rotary shaft; a first seal body which has a plurality of first thin plate seal pieces extending inward in a radial direction from the retainer and laminated in the circumferential direction; a high-pressure side plate; a low-pressure side plate; and a second seal body having a plurality of second thin plate seal pieces which are laminated at an end portion of the retainer in the circumferential direction, extend inward in the radial direction, and have fluttering resistance higher than the first thin plate seal piece. The high-pressure side plate and the low-pressure side plate cover at least a part of the second seal body in the circumferential direction.

    CLEARANCE-CONTROL-TYPE SEAL STRUCTURE
    8.
    发明申请
    CLEARANCE-CONTROL-TYPE SEAL STRUCTURE 审中-公开

    公开(公告)号：US20170328232A1

    公开(公告)日：2017-11-16

    申请号：US15521045

    申请日：2015-10-28

    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

    Inventor： Kohei OZAKI ,  Hidekazu UEHARA ,  Shin NISHIMOTO

    IPC: F01D11/24 ,  F01D11/02 ,  F01D11/10 ,  F16J15/44

    CPC classification number: F01D11/24 ,  F01D11/001 ,  F01D11/003 ,  F01D11/025 ,  F01D11/10 ,  F01D11/20 ,  F05D2240/55 ,  F16J15/002 ,  F16J15/442 ,  F16J15/445

    Abstract: A clearance-control-type seal structure including a plurality of arc-shaped grooves (23) formed side by side in the axial direction with respect to an inner circumferential surface of a housing (22) of a turbine; and abradable seal rings (11, 12) having fitting parts (11a, 12a) that are fitted into the grooves so as to leave a prescribed gap, that have extended parts (11b, 12b) that are exposed from the housing in the radial direction toward the inside and expand in the axial direction, and that, during operation, due to back pressure inside the grooves, receive a force that moves in the radial direction toward the inside. One extended part has a protruding part extending even further in the axial direction toward the upstream side, and the other extended part has formed in an outer circumferential surface of a downstream-side end part thereof a recessed part that corresponds to the protruding part.

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