317 密封液自己循環型ビスコシールの特性 : 流れの可視化法によるガス巻き込み現象の観察(流体工学III・流体機械)(オーガナイズドセッション(b)実地における流体諸問題)

概要

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Gas ingestion phenomena occur in viscoseal, which is a kind of noncontact seal, and the ingested gas adversely affects its performance. A sealant self-circulated type of viscoseal has been developed to prevent gas blow-out from the gas casing to the turbine casing and to cope with sudden pressure change in the turbine casing. Experiments were carried out using an apparatus with a threaded shaft (400-1200rpm) with 100mm diameter, 270mm length and 0.2mm clearance between the shaft and the housing. Water was used as sealant. Some observations of gas ingestion phenomena described here were performed by the flow visualization method. The results confirm that a small amount of self-circulated sealant is effective to prevent gas blow-out from the gas casing to the turbine casing. The improvement of the performance of viscoseal is also ensured.
一般社団法人日本機械学会の論文
2000-09-25