SEALING DEVICE
To provide a sealing device capable of improving pressure resistance while enabling being applied to high-speed rotation applications.SOLUTION: On a sealing target fluid side (O) sealing a sealing target fluid than an outer peripheral seal surface 150, a sealing target fluid side exhaust valve 160 i...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a sealing device capable of improving pressure resistance while enabling being applied to high-speed rotation applications.SOLUTION: On a sealing target fluid side (O) sealing a sealing target fluid than an outer peripheral seal surface 150, a sealing target fluid side exhaust valve 160 is provided, which extends outward in a diametrical direction and toward the sealing target fluid side (O), can exhaust gas in a space K between an inner peripheral surface and an outer peripheral seal surface 150 of a housing 300 toward the sealing target fluid side (O), and prevents gas from entering the space K from the sealing target fluid side (O). On an atmosphere side (A) on the opposite side to the sealing target fluid side (O) than outer peripheral seal surface 150, an anti-sealing target fluid side exhaust valve 170 is provided, which extends outward in the diametrical direction and toward an atmosphere side (A), can exhaust gas in the space K toward the atmosphere side (A), and prevents the gas from entering the space K from the atmosphere side (A).SELECTED DRAWING: Figure 2
【課題】高速回転用途への適用を可能としつつ、耐圧性を高めることのできる密封装置を提供する。【解決手段】外周シール面150よりも密封対象流体が密封される密封対象流体側(O)には、径方向外側かつ密封対象流体側(O)に向かって伸び、ハウジング300の内周面と外周シール面150との間の空間K内の気体を密封対象流体側(O)に向かって排気させることができ、かつ密封対象流体側(O)から前記空間K内への気体の侵入を阻止する密封対象流体側排気弁160が設けられ、外周シール面150よりも密封対象流体側(O)とは反対側の大気側(A)には、径方向外側かつ大気側(A)に向かって伸び、前記空間K内の気体を大気側(A)に向かって排気させることができ、かつ大気側(A)から前記空間K内への気体の侵入を阻止する反密封対象流体側排気弁170が設けられていることを特徴とする。【選択図】図2 |
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