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    Variable area diffuser for compressor
    1.
    发明授权
    Variable area diffuser for compressor 失效
    用于压缩机的可变区域扩散器

    公开(公告)号：US3478955A

    公开(公告)日：1969-11-18

    申请号：US3478955D

    申请日：1968-03-11

    Applicant: DRESSER IND

    Inventor： KUNDERMAN FRED K

    IPC: F01D17/14 ,  F04D27/02 ,  F04F5/48

    CPC classification number: F01D17/143 ,  F04D29/464

    Abstract: 1,231,152. Centrifugal compressors. DRESSER INDUSTRIES Inc. March 3, 1969 [March 11, 1968], No.11256/69. Heading F1C. In a centrifugal compressor comprising an annular diffuser passage 20, Fig. 1, between the impeller 14 and a discharge chamber 13, a wall part 21 is movable to vary the axial width of the diffuser passage. The wall part 21 is connected via four cylindrical posts 23 to a control ring 32 which can be partially rotated in either direction on ball bearings 42 to control the axial position of the wall part 21. Each post 23 is slidably connected to a cam in the form of a helical web 36 extending circumferentially around parts of the ring 32 and having an arcuate slot 37 which receives a stud 26 carrying a pair of washer-like bearing members 38, e.g. of bronze, having bosses (39), Fig.3 (not shown), extending into the slot. The ring 32 is moved by an arm 40, e.g. in accordance with a compressor operating condition. Gas circulation around the back of the wall part 21 is prevented by seal rings 27, 28. Pressure balancing passages 29 are provided through the wall part 21.

    Turbo-machinery seal
    2.
    发明授权
    Turbo-machinery seal 失效
    涡轮机械密封

    公开(公告)号：US3915459A

    公开(公告)日：1975-10-28

    申请号：US46956174

    申请日：1974-05-13

    Applicant: DRESSER IND

    Inventor： KUNDERMAN FRED K

    IPC: F16J15/16 ,  F01D11/00 ,  F01D25/18 ,  F16J15/34 ,  F16J15/40 ,  F16J15/44

    CPC classification number: F16J15/441 ,  F01D11/00 ,  F01D25/186

    Abstract: The improved turbo-machinery seal described herein includes an annular seal body encircling the turbo-machinery rotor shaft and disposed within the housing. The seal body includes a first end arranged to frictionally and sealingly engage a radially disposed face in the housing while the seal is exposed to a pressure fluid that biases the seal body toward the radial face. In one aspect, the seal body is provided with a recess in a portion of the bore adjacent the rotor shaft that is exposed to the pressure fluid providing a biasing force on the seal body in a radial direction. In another aspect, the seal body may be provided with a seal on the outer periphery thereof that engages the housing. The area thus isolated by the seal is vented to a low pressure so that the seal body is biased radially. The purpose of the radial bias on the seal body is to provide the seal with a predetermined direction of force so that predictable results can be obtained with respect to the shaft supporting characteristics of the improved seal.

    Abstract translation: 本文所述的改进的涡轮机械密封件包括围绕涡轮机械转子轴并设置在壳体内的环形密封体。 密封体包括第一端，该第一端布置成摩擦并密封地接合壳体中径向布置的面，同时密封件暴露于将密封体朝向径向面偏压的压力流体。 在一个方面，密封体在靠近转子轴的孔的一部分中设置有凹部，暴露于压力流体沿径向向密封体提供偏置力。 在另一方面，密封体可以在其外周上设置有与壳体接合的密封件。 通过密封件隔离的区域被排放到低压，使得密封体径向偏压。 密封体上的径向偏压的目的是提供具有预定方向力的密封，从而可以获得关于改进的密封件的轴支撑特性的可预测的结果。

    Turbo-machines
    4.
    发明授权
    Turbo-machines 失效
    涡轮机

    公开(公告)号：US3912342A

    公开(公告)日：1975-10-14

    申请号：US43182374

    申请日：1974-01-09

    Applicant: DRESSER IND

    Inventor： SCHIRM ALBERT C ,  KUNDERMAN FRED K

    IPC: F01B11/00 ,  F01D11/00 ,  F04D29/10 ,  F16J15/16 ,  F16J15/34 ,  F16J15/44 ,  F16J15/28

    CPC classification number: F16J15/441 ,  F01D11/003

    Abstract: An improved seal is disclosed herein for use in turbo-machines. The seal includes an annular seal body encircling the shaft and having a surface portion thereon arranged to frictionally engage the turbo-machine housing. A counterbore is formed in one end of the seal body and a plurality of bearing shoes are movably attached to the body and located in the counterbore. The seal body includes a sealing surface adjacent the shaft which is held in concentricity with the shaft by the bearing shoes. The seal is located in a cavity in the housing. The cavity receives pressurized fluid that exerts a biasing force on the seal to force the seal into frictional and sealing engagement with the housing thereby providing additional stiffness to the shaft.

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