pressure header 中文意思是什麼
pressure header
解釋
壓力總管-
An engineer case is introduced, which is about " the reconstruction of high voltage fan ' s speed - adjusting by frequency conversion and the design of plc ( programmable logic controller ) control system in shui cheng iron and steel company ". in this project, an advanced controlling technology, based on the method in this paper, is used to realize the closed loop control of discharge header pressure of two coke ovens
介紹「水鋼煤焦化公司鼓風機高壓變頻調速及系統plc控制改造」的工程概況，對煤氣鼓風機採用先進的變頻調速技術和計算機控制技術進行改造，實現對兩座焦爐集氣管壓力自動調節的閉環控制功能，既滿足了煤氣量的自動調節的要求，又避免了煤氣鼓風機出口閥門的節流調節，節能效果相當可觀。 -
A coke oven represents a kind of controlled object with a full spectrum of closely coupled factors, such as distributed parameters, no - linearity, time - dependent change and multi - variable features. among them, the discharge header pressure and fan suction are key parameters, and also constitute strongly coupled variables with very close inter - relation, which are fulfilled by the way of regulating coal - feeding and the rate of primary air supply in practice
焦爐是一個分佈參數，非線性、時變、多變量緊密耦合的被控對象，其中集氣管壓力和鼓風機吸力既是關鍵參數，又是具有緊密關系的強耦合變量，它們均是通過調節給煤量和一次送風量來實現控制的。 -
Copper and aluminum unified core or all copper core : header pipe diameter up to 22mm or 25mm, few welding line, high intension, and strong pressure resistance
板芯以銅鋁復合為主或全銅，集熱管直徑達22mm或25mm ，無焊接線，高效能，強承壓。 -
The experimental and simulation results show that using the improved structure of inlet header can greatly improve flow uniformity, decrease pressure loss, enhance the efficiency of twc, attribute to prolonging the service life of the machine, and lessen the power decrease caused by twc, but the light - off time of twc is retarded
通過模擬與試驗表明，與常規結構催化轉化器相比，組合型入口管可明顯改善流動均勻性，降低壓力損失約1 / 4 ，提高催化轉化器效率，延長使用壽命，減小對發動機動力性的影響，但起燃變慢。 -
They maintained the pressure with saves on bianchi ' s header and montolivo ' s fierce strike, but norwegian goalkeeper larsen could do nothing on pazzini ' s header as it flew in under the crossbar
有威脅的攻勢還包括比安奇的頭球射門和蒙托里沃大力射門，但是挪威守門員拉爾森面對帕齊尼的頭球豪無辦法 -
When several coke ovens are connected in parallel, there are many external disturbance factors, as well as complex coupling relations, so the discharge header pressure system of coke oven is a complex multivariable control system and there is no mathematical model up to now
在多座焦爐並聯生產條件下，集氣管壓力控制對象存在復雜的耦合關系，且尚無精確的數學模型，這就給集氣管壓力控制系統的設計帶來困難，難以實現精確的控制。 -
The above circumstances will create some difficulties for the design of a discharge header pressure of coke oven control system, whose difficulties make it hard to realize an accurate control. in this paper, after comparing the difference of some kinds of decoupling control method, aiming at the feature of the coke oven pressure system and based on the coupling phenomena caused by the fluctuate between border upon channels, using the theory of feedforward and thinking about the influence between the fan suction and the discharge header pressure, a kind method of fuzzy feedforward is presented and used to control the discharge header pressure
本文在比較了目前各種解耦方法的優缺點后，針對集氣管壓力控制的特點，基於相鄰通道的波動引起的耦合現象，採用前饋補償原則，同時考慮鼓風機吸力對集氣管壓力的影響，將常規pid控制技術、多變量經典控制技術和多變量模糊控制技術相結合，提出了一種基於模糊邏輯的模糊前饋解耦方法，用於集氣管壓力控制。 -
Based on the experience of regulating frequency according to different valve ' s angle, a reasonable controlling tactic is proposed. when the situation changes to a small degree, electromotor makes fan running at a constant rate ; when the situation changes to the limiting range, the discharge header pressure is automatically adjusted by the rate of fan
制定合理的控制策略，採用基於閥門開度的變頻調節策略，即工況變化較小的情況下，電機帶動鼓風機恆速運行，通過控制閥門開度自動調節集氣管壓力；當閥門開度到達極限值，還不能達到控制要求時，再通過變頻器改變鼓風機轉速，以自動調節集氣管壓力。 -
Effect of different improved header on flow and pressure difference in plate - fin exchangers
封頭對板翅式換熱器流動及阻力特性的影響
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