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    • 10. 发明公开
    • CIRCUMFERENTIAL BACK-TO-BACK SEAL ASSEMBLY WITH BIFURCATED FLOW
    • UMLAUFENDE PARALLELDICHTUNGSANORDNUNG MIT VERZWEIGTERSTRÖMUNG
    • EP2986832A4
    • 2016-11-09
    • EP14785238
    • 2014-04-11
    • STEIN SEAL CO
    • GARRISON GLENN M
    • F02C7/28F01D11/02F16J15/16F16J15/44
    • F16C32/0662F01D11/04F01D25/22F05D2250/75F16C32/0607F16C32/0625F16C2360/23F16J15/40F16J15/441F16J15/442
    • A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation. Each groove is also tapered widthwise.
    • 提出了一种周向密封组件,其能够在与一对密封环之间通信之前将气体分离成两个单独的流动路径。 密封组件包括环形密封壳体,一对环形密封环,可旋转的浇道和多个凹槽结构。 密封壳体插入在一对低压室之间。 密封环分开地设置在密封壳体内并且分开设置在可旋转的流道周围。 槽结构沿着可旋转的浇道的外圆周表面设置。 气体可以连通到凹槽结构上。 每个沟槽结构在通气之前将气体分叉到密封环上。 在气体连通到密封环之前,每个凹槽结构内的流动可以进一步分离。 气体在可旋转的流道和每个密封环之间形成薄膜层。