PROBLEM TO BE SOLVED: To provide a seal ring for a stern tube and a stern tube sealing structure capable of suppressing abrasion of a sliding face of a lip portion.SOLUTION: A seal ring 124 for a stern tube composed of a rubber elastic body, to seal an annular clearance between a liner 220 disposed on an outer periphery of a propeller shaft 210 and the stern tube 300, includes a lip portion 1240 sliding on an outer peripheral face of the liner 220, and a bent portion 1241 extended to a radial outer side and an axial one side, and then bent to be extended to the radial outer side and the axial other side. The bent portion 1241 includes reinforcement regions 1243A, 1243D provided with reinforcement portions 1243a-1243f connecting a radial inner portion 1241a as a part extended toward the axial one side and a radial outer diameter portion 1241b as a part extended toward the axial other side, and thin regions 1244A, 1244B in a circumferential direction.SELECTED DRAWING: Figure 3

    【課題】リップ部の摺動面の摩耗を抑制することのできる船尾管用シールリング及び船尾管密封構造を提供する。【解決手段】プロペラ軸210の外周に設けられたライナ220と、船尾管300との間の環状隙間を封止するゴム状弾性体製の船尾管用シールリング124であって、ライナ220の外周面に摺動するリップ部1240と、径方向外側かつ軸方向一方側へ向かって延びた後に屈曲して径方向外側かつ軸方向他方側に延びる屈曲部1241と、を備え、屈曲部1241が、軸方向一方側へ向かって延びる部分である径方向内側部1241aと軸方向他方側に向かって延びる部分である径方向外径部1241bとを繋ぐ補強部1243a〜1243fが形成された補強領域1243A,1243Dと、薄肉領域1244A,1244Bと、を周方向に備える。【選択図】図3


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    Title :

    SEAL RING FOR STERN TUBE, AND STERN TUBE SEALING STRUCTURE


    Additional title:

    船尾管用シールリング及び船尾管密封構造


    Contributors:

    Publication date :

    2017-10-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16J Kolben , PISTONS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING




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