第3题
B、只有当管网性能曲线与压缩机性能曲线的交点进入喘振界限线之内,才会发生喘振现象
C、当接近或进入喘振工况时,机体和轴承会发生强烈的振动
D、吸入气体的分子量变小、吸入温度变高、吸入压力变低都是通过降低了吸入气体的密度,而容易引起压缩机喘振
第6题
A.无往复运动部件,运转平稳,振动小,基础要求简单
B.制冷量调节范围小
C.单机容量大,体积小,重量轻,占地少
D.工作可靠,寿命长,操作简单,维护费用低
第7题
A. 轴承温度过高、气体冷却器出口处温度超过60℃
B. 轴承振动过大、汽缸发热
C. 填料函漏气、气体出口流量降低
D. 轴承温度过高、排气量达不到设计要求
第10题
A、结构紧凑,尺寸小,重量轻Compact structure, small size and light weight;
B、排气均匀,连续,不需级间的缓冲容器,可以直接进行串联运行Uniform exhaust, continuous, no need for buffer containers between stages, can be directly in series operation;
C、无往复运动部件,振动小,易损件少,不需庞大而笨重的基础No reciprocating moving parts, small vibration, less wearing parts, do not need a large and heavy foundation;
D、除轴承外,机件内部不需要润滑,节省油料,且不会污染所输送的气体In addition to the bearing, the internal parts do not need lubrication, save oil, and will not pollute the transmission of gas;
E、转速高,可与蒸汽轮机或燃气轮机直接联动,便于调节流量,利于节能High speed, can be directly linked with the steam turbine or gas turbine, easy to adjust the flow rate, conducive to energy saving;
F、维修工作量小,调节方便。Small maintenance workload, easy to adjust.
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