working pressure head 中文意思是什麼

working pressure head 解釋
工作壓頭
  • working : adj 1 工作的,從事勞動的。2 操作的,作業的。3 工人的。4 (用於)實際工作的,任事的;使用(中)的...
  • pressure : n 1 壓;按;擠;榨。2 【物理學】壓力,壓強;大氣壓力;電壓。3 精神壓力,政治[經濟、輿論等]壓力。4...
  • head : n 1 頭,頭部,首。2 頭腦,才能;智力,想像力,理解力。3 前部,上部;頂端,尖突部;船長;(書頁等...
  1. This paper analysed working principles and controling features of water lifts about the head pressure transition. plc was used to operate controling system so as to work the system well

    摘要對水頭差壓力轉換提水裝置的工作原理及控制特點進行了分析,使用可編程式控制制器( plc )控制系統運行,使系統很好的工作。
  2. It is indicated that, when a two - speed motor is used for driving oil transfer pump, the motor with the characteristic of torque reduction on square rotary speed should be chosen ; the working economy of the variable speed pump is restricted by the characteristic curves of pipeline resistance, and its speed control range is restricted by the pipeline resistance characteristic curve, the pressure head needed by the system and the working characteristic of the pump ; when several pumps work in parallel, the pump with better performance should be changed into speed - variable pump

    指出雙速電動機用於輸油泵的調速時,應選用轉矩按轉速平方降低特性的電動機;調速泵的運行經濟性受到管路阻力特性曲線的限制,其調速范圍受到管路阻力特性曲線、系統所需揚程和泵運行特性的限制;在母管制系統中把部分定速泵改為調速泵時,應將性能較高的定速泵改為調速泵。
  3. Present the experimental research carried out on strain and stress by applying the resistance strain surveying technique to the big hole sealed heads in the new fire - tube heating boilers with the laws of strain and stress distribution obtained and allowable working pressure given because there is no applicable standards or specification for calculating the strength of crude oil heating boiler heads perforated by densely distributed big - holes, which, to a certain extent, hampered the further development of crude oil heating boilers in china, and concludes from experimental results that strain and the stress of circumference are fairly large near the edge of big - hole, and the cross ribs enhance strength of sealed head to a certain degree

    油田火筒加熱爐密集大開孔封頭的設計計算,因沒有相應的強度計算標準在一定程度上限制了我國油田火筒加熱爐技術的發展.採用電阻應變測量技術,對新型火筒加熱爐大開孔封頭進行了應力應變試驗研究,得到了封頭的應變和應力分佈規律,給出了大開孔封頭允許的工作壓力.試驗結果表明,大孔邊緣圓周處應力應變較大,十字筋板對封頭有一定加強作用
  4. Abstract : the present paper analyzes the axial pressure of the coil, the working principle of the coil drum and causes of slide scar on the strip head and advances the new method for the taper control of the coiling tension

    文摘:針對單機架平整機的帶鋼頭部滑傷問題,分析了鋼卷徑向壓力、捲筒的工作原理,及帶鋼頭部滑傷形成原因,提出了卷取張力採用錐形控制的新方法。
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