问题
问答题 简答题
试述推力瓦液压减载装置的作用。
答案
参考答案:
液压减载装置也称为高压油顶起装置,它在机组起动前和起动过程中不断向推力瓦油槽孔打入高压油,使镜板顶起,在推力瓦和镜板间预先形成厚0.04mm的高压油膜,这样就改善了机组起动润滑条件,降低了摩擦系数,从而减少了摩擦损耗,损高了瓦的可靠性。采用这种装置不仅可缩短起动时间,而且还便于安装时对机组盘车。
试述推力瓦液压减载装置的作用。
参考答案:
液压减载装置也称为高压油顶起装置,它在机组起动前和起动过程中不断向推力瓦油槽孔打入高压油,使镜板顶起,在推力瓦和镜板间预先形成厚0.04mm的高压油膜,这样就改善了机组起动润滑条件,降低了摩擦系数,从而减少了摩擦损耗,损高了瓦的可靠性。采用这种装置不仅可缩短起动时间,而且还便于安装时对机组盘车。
选择适当的句子补全对话。 | |
A: Excuse me. 1. ______? B: Sorry, I don't have one. A: So I must go to the shop near our school. B: I think the shop is closed at this time. A: 2. ______ ? B: It's Sunday. On Sunday the shop closes early. A; 3. ______? B: Look, it says "closed". A: Oh, dear! You're right. It is closed. 4. ______? B: 5. ______ It's open 24 hours. A: OK, Let's go.
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