工芸基礎知識(選択問題)201800302
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ギアポンプに関する次の記述で正しいものは。 A. 内歯車ポンプの歯輪リングと歯車は同じ向きに回転するB. 機械式シールには潤滑が不要
C. 推送油の粘度が高いほど漏れが少なく、容積効率が高い
D. 排出圧力が上昇しても実際の流量は変わらない
ヒント:機械式シールは油潤滑がなければすぐに摩耗する;油の粘度が高く、吸い込みにくい;排圧が高いとギアポンプの漏れがひどくなる。
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