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    • 9. 发明申请
    • ROTARY SHAFT SEALING DEVICE
    • 旋转轴密封装置
    • WO1992007207A1
    • 1992-04-30
    • PCT/US1991004987
    • 1991-07-18
    • ROTOFLEX, INC.
    • ROTOFLEX, INC.SIMMONS, Brian
    • F16J15/34
    • F16J15/3456F16J15/3472Y10S277/914Y10S277/936
    • A dry face seal (10) for preventing leakage around a rotary shaft (60) extending through a structural casing comprises an annular stationary rigid seal (26) and a rotary seal (20). The stationary seal, secured to the structural casing for surrounding the rotary shaft, has a smooth sealing surface for establishing a dry face seal. The resilient rotary seal means is adapted to be secured to the rotary shaft and has an annular projecting edge means (75) for containing the smooth sealing surface under a biased pressure to form a dry face seal in conjunction therewith. The resilient rotary seal means comprises a carbon filled thermally resistant polymer composition having a durometer hardness of from about 85 to about 91, and preferably comprises a fluorocarbon filled with finely divided carbon black.
    • 用于防止在延伸穿过结构壳体的旋转轴(60)周围的泄漏的干面密封件(10)包括环形静止刚性密封件(26)和旋转密封件(20)。 固定在结构外壳上用于围绕旋转轴的固定密封件具有用于形成干面密封的光滑的密封表面。 弹性旋转密封装置适于固定到旋转轴上,并且具有环形突出边缘装置(75),用于在偏压下容纳光滑的密封表面以与之结合形成干面密封。 弹性旋转密封装置包括具有约85至约91的硬度计硬度的填充碳的耐热聚合物组合物,并且优选地包括填充有细碎炭黑的碳氟化合物。
    • 10. 发明申请
    • SECONDARY GAS/LIQUID MECHANICAL SEAL ASSEMBLY
    • 二次气/液体机械密封组件
    • WO1993010380A1
    • 1993-05-27
    • PCT/US1992009937
    • 1992-11-10
    • BW/IP INTERNATIONAL, INC.
    • BW/IP INTERNATIONAL, INC.SALANT, RichardGREEN, ItzhakHUFFORD, Larry, A.GILES, Oley
    • F16J15/34
    • F16J15/3432F16J15/008Y10S277/914Y10S277/929
    • A secondary mechanical seal assembly is used on a shaft (12) that is rotatable within a housing (14) to seal both gaseous and liquid medium (20). The assembly (18) includes a stationary seal face element (26) that is fixed relative to the housing and a rotating seal face element (24) that is fixed relative to the shaft (12). One of the seal face element (24-26) back surfaces (34) includes at least one slot (40) configured to produce a wave on the front surface (32) of the seal face element (24-26) when the shaft (12) is rotated. The wave creates an opening force that is sufficient to control wear and prolong seal life when the secondary seal assembly (18) is exposed to a gaseous medium. When exposed to a pressurized liquid medium, the hydrodynamic loading from the liquid medium alters the seal face element (24-26) waviness, and increases the closing force due to the action of the pressurized liquid on the back surface of the seal face elements, such that excessive leakage is prevented.
    • 第二机械密封组件用于可在壳体(14)内旋转以密封气体和液体介质(20)的轴(12)上。 组件(18)包括相对于壳体固定的固定密封面元件(26)和相对于轴(12)固定的旋转密封面元件(24)。 密封面元件(24-26)后表面(34)中的一个包括至少一个槽(40),其构造成当轴(24-26)在密封面元件(24-26)的前表面(32)上产生波时 12)旋转。 当二次密封组件(18)暴露于气体介质时,该波形产生足以控制磨损并延长密封寿命的打开力。 当暴露于加压液体介质时,来自液体介质的流体动力学负载改变了密封面元件(24-26)波纹,并且由于加压液体在密封面元件的后表面上的作用而增加了闭合力, 使得防止了过度的泄漏。