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132 条记录 (耗时 0.013 秒)

    Sealing assembly
    61.
    发明授权
    Sealing assembly 失效
    密封组件

    公开(公告)号：US3994503A

    公开(公告)日：1976-11-30

    申请号：US625155

    申请日：1975-10-23

    申请人： Georges Dousse ,  Jean-Paul Etheimer

    发明人： Georges Dousse ,  Jean-Paul Etheimer

    IPC分类号： F04D29/14 ,  F16J15/00 ,  F16J15/34 ,  F16J15/46

    CPC分类号： F16J15/008 ,  Y10S277/914 ,  Y10S277/929

    摘要： An assembly for sealing against the escape of gas round a rotary shift where it exits from apparatus containing gas under pressure, such as a compressor, comprising an oil (or other sealing liquid) film seal means arranged where said shaft exits from the body of the apparatus and comprising an annular chamber surrounding said shaft and to be supplied with oil at a pressure above that of said gas in said apparatus, said annular chamber being axially closed by two axially spaced annular elements mounted on said shaft with radial clearance to provide a passage for oil to flow from said chamber between said annular elements and said shaft, and sealing means for preventing escape of gas in the event of a failure of the supply of oil to said annular chamber or stoppage of said apparatus and comprising an outer chamber, an annular piston in said outer chamber in engagement with said shaft through a labyrinth seal, and first and second seals, said first seal being connected with said piston and said second seal being fixed on said shaft, said seals being arranged so that they contact each other when the piston is moved in said one direction under the pressure of oil in said part of said outer chamber and are spaced apart when said piston is moved in said opposite direction under the action of said resilient means, closure of said closure valve being effected following failure of said oil supply or stoppage of said apparatus.

    摘要翻译： 一种组合件，用于密封气体绕着旋转位移排出的位置，该旋转位移在其从包含压力的气体的装置（例如压缩机）中排出，包括油（或其它密封液体）膜密封装置，其布置在所述轴离开主体的位置 装置，并且包括围绕所述轴的环形室，并且在所述设备中的压力高于所述气体的压力下供应油，所述环形室由安装在所述轴上的径向间隙的两个轴向间隔开的环形元件轴向封闭，以提供通道 用于油在所述环形元件和所述轴之间从所述腔室流动;以及密封装置，用于防止在向所述环形室供应油的故障或者所述设备的停止的情况下气体逸出，并且包括外室， 所述外室中的环形活塞通过迷宫式密封件与所述轴接合，以及第一和第二密封件，所述第一密封件与所述活塞连接 d，所述第二密封件固定在所述轴上，所述密封件被布置成使得当所述活塞在所述外部室的所述部分中的油压力下在所述一个方向上移动时它们彼此接触，并且当所述活塞移动时间隔开 在所述弹性装置的作用下在所述相反方向上，所述关闭阀的关闭是在所述供油或所述装置停止之后进行的。

    Secondary sealing device
    62.
    发明授权
    Secondary sealing device 失效
    二次密封装置

    公开(公告)号：US3947044A

    公开(公告)日：1976-03-30

    申请号：US593817

    申请日：1975-07-07

    申请人： Jaromir Friedrich

    发明人： Jaromir Friedrich

    IPC分类号： F04D29/12 ,  F04D29/14 ,  F16J15/00 ,  F16J15/16 ,  F16J15/06 ,  F16J15/24

    CPC分类号： F16J15/008 ,  F04D29/12 ,  F04D29/14 ,  F16J15/164 ,  Y10S277/929

    摘要： A secondary sealing device is provided for a pump used for pumping gases under pressure. Leakage of gas between a main seal and the pump shaft is permitted up to a predetermined maximum pressure but once that pressure has been exceeded, a pressure sensor activates a switch to stop rotation of the pump shaft. When the shaft has come to a halt, a high pressure gas such as nitrogen is introduced into a secondary seal circumferential of the shaft whereby a resilient sealing ring is forced into tight sealing contact with the pump shaft to prevent any further leakage of the pumped gas to the atmosphere.