助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[6]条 当前为第1条到6条
 

相关语句
impeller channel
    Five-Axis High Speed Milling Toolpath Calculation for Impeller Channel
    叶轮流道5轴高速铣加工刀轨计算
    The design principle of complex impeller of lowspecificspeed,lowtemperature and highspeed centrifugal pumps is derived according to relative velocity distribution in impeller channel. The design rules and the empirical formula of blade numbers are given.
    从叶轮流道相对速度分布导出了低比转速低温高速离心泵复合叶轮的设计原理,提出了复合叶轮的设计准则,并给出了叶片数的经验计算公式。
    Through analyzing the operation conditions of compressors and pumps in service in the refinery plant of Daqing Petrochemical Complex, factors that restrict the total efficiency of compressors and pumps such as pump outlet valve throttling and motor power too big, etc. are found out, and energy-saving improvement measures of blocking impeller channel, turning the outside diameter of impeller and replacing energy-saving motors are recommended, thus saving electricity 412 500 kWh/a.
    通过对大庆石油化工总厂炼油厂在用机泵运行状况分析,找出了泵出口阀节流、电机功率过大等制约机泵综合效率的因素,提出了堵塞叶轮流道、车削叶轮外径、更换节能电机等节能改造方法,年节电41.25万kWh
    This paper discusses the pressure exceeding problem at the second stage exit of CO 2 centrifugal compressor in urea plant after long period of running and gives countermeasures The main reason for this problem is the scaling of high pressure cylinder impeller channel while the direct cause is the sulfur containing CO 2 gas and ammonia containing water used to wash the CO 2 gas To adjust the operation style according to the scaling degree of the rotator can effectively control and reduce further generation of the scale
    对尿素装置二氧化碳离心式压缩机长周期运行中出现的二段出口压力超高问题 ,进行分析讨论 ,提出解决对策。 其主要原因是高压缸叶轮流道结垢 ,CO2 气中含硫、洗涤CO2 气用的水中含氨是形成叶轮结垢的直接原因。
    Through the experiment and simulation,it is validated that the back flow in impeller channel is a key factor which affects the efficiency and small-flow instability of low-specific centrifugal pump and centrifugal pump with closed complex impeller with long,middle and short blades can be used to deliver small-flow high-head liquid media.
    通过实验和数值模拟,验证了叶轮流道里的回流是影响低比转速离心泵效率和小流量不稳定的一个重要因素; 采用具有中、长、短的闭式复合叶轮离心泵适合用来输送小流量、高扬程的液态介质。
    It is nearly as fast as the one of UG at the run-velocity. Test results show that it works quite stable in finish-machining impeller channel with Al alloy at a spindle-speed of 5 000 r/min and a feed-rate 600 mm/min. Accordingly it is very beneficial for high speed machining.
    经测试,该算法的运行速度已接近于UG,所生成的加工刀轨加工材料为铝合金的叶轮流道,刀具能以转速5 000r/m in以及进给速度600 mm/m in平稳地进行精加工,满足了高速走刀的要求。
 

首页上一页1下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社