PROBLEM TO BE SOLVED: To more suppress leakage of lubricant than conventional ones, in a non-contact labyrinth seal structure of a gear box for a railroad vehicle.SOLUTION: In a non-contact seal device 1 of a gear box for a railroad vehicle, a labyrinth seal is composed of a rotational shaft side sleeve 11 as a rotary wall and a casing side sleeve 21 as a stationary wall. Grooves 41, 42 are formed on and above an outer periphery of a narrow clearance B by recess parts 41a, 41b. Oil droplets x falling downward along a one-side end surface 21k of a first recess part 21b on the stationary side are trapped by the groove 41, 42, and then fall downward with the grooves 41, 42 as a guide. Consequently, the oil droplets x can be prevented from entering the narrow clearance B.SELECTED DRAWING: Figure 1

    【課題】鉄道車両用歯車箱の非接触のラビリンスシール構造において、従来よりも潤滑油の漏出を抑える。【解決手段】鉄道車両用歯車箱の非接触式シール装置1において、回転壁となる回転軸側スリーブ11と固定壁となるケーシング側スリーブ21とによってラビリンスシールが構成される。狭間隙Bの外周かつ上方に凹条部41a、41bによって溝41、42を形成する。固定壁側の第1の凹部21bの一側端面21kを伝って下方に落ちていく油滴xは、溝41、42によってトラップされその後溝41、42をガイドとして下方に落下する。したがって油滴xは狭間隙Bに侵入することが抑えられる。【選択図】図1


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    Title :

    NON-CONTACT TYPE SEAL DEVICE OF GEAR BOX FOR RAILROAD VEHICLE


    Additional title:

    鉄道車両用歯車箱の非接触式シール装置


    Contributors:

    Publication date :

    2017-08-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16J Kolben , PISTONS / B61C Lokomotiven , LOCOMOTIVES / B61F Untergestelle für Schienenfahrzeuge, z.B. Fahrgestellrahmen, Drehgestelle oder Anordnungen der Radsätze , RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES



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