SEALING ASSEMBLY AND HYDRAULIC ACTUATOR CYLINDER ASSEMBLY OF TURBINE VALVE HAVING THE SAME

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The present invention relates to a sealing assembly and a hydraulic actuator cylinder assembly for a turbine valve, including the same. The sealing assembly seals a gap between a first body, having a circular cross section, and a second body having a circular cross section assembled with the outer or inner surface of the first body. The sealing assembly includes : an O-ring member inserted into a sealing groove of the first body; and a sealing member inserted into the sealing groove, and installed between the O-ring member and the second body. As such, the sealing assembly keeps airtightness between the first and second bodies. The sealing member includes : a first sealing unit installed on a side, taking hydraulic fluid, to primarily prevent a leak of the hydraulic fluid, and including a first protruding part protruding towards the second body to make line contact with the inner surface of the second body; and a second sealing unit integrated with the first sealing unit, but installed on the opposite side to the side, taking the hydraulic fluid, to secondarily prevent a leak of the hydraulic fluid, and including a second protruding part making line contact with the inner surface of the second body. The sealing member is able to more include : an oil pocket formed between the first and second protruding parts, and filled with the hydraulic fluid to improve lubrication between the first and second sealing units; and an oil hole penetrated between the first and second sealing units to induce the hydraulic fluid, flowing in through an inlet formed in an inflow direction of the hydraulic fluid, into the oil pocket.COPYRIGHT KIPO 2017