閥前壓力 的英文怎麼說
中文拼音 [fáqiányālì]
閥前壓力
英文
upstream pressure-
After the introduction of the selected elements, the thesis gives out a design which includes a front control center based on siemens s7300 plc 、 a line connection of the master profibus and the distributed intelligent i / o et200m system 、 a real - time display system of pressure sensors and a gas supply system with stop valve and electric actuator
本文在介紹了所選擇器件情況基礎上，設計了基於siemenss7300plc為前端控制中心，利用profibus總線接分散式智能i / o et200m系統，壓力傳感器現場顯示，截止閥加電動執行器實現配氣的方案。It has the characteristic of non - gear - box, large output torque, small volume, easy control, fast response, high track precision, high reliability etc. the system has potential advantages over substituting for traditional hydraulic or pneumatic missile actuator servo control system and has wide prospect in the fields of aerial actuator, servo valve, robot, radar antenna etc. the system ' s operation principle, control idea, functions and realization of each component are discussed in detail
該系統在取代傳統的液壓、氣動導彈舵機伺服控制系統方面有很大潛力，同時在航空舵機、伺服閥，以及機器人關節的直接驅動、雷達天線等領域具有廣闊的應用前景。論文詳述了系統的工作原理與控制思想，以及系統方案的設計和各組成部分的功能與實現方法。Unscrew # 2 check ( turncounter - clockwise ) by placing along screwdriver across lugs and applying pressure to loosen # 2 check
將螺絲起子向前插入穿過凸耳桉逆時針方向旋轉2號止回閥的螺紋，並施加壓力松開2號止回閥。A transparent model is used to make the deflection jet board grounded on the inhere enlarged dimensions. the finished experiments are conducted to catch the flow rate directions and the situation of cavitation using a high - speed video cameras. in this paper, the finite element analysis and visualiation research of servo valve prestage jet flow field are carried out, which establish the theoretical foundation for mathematical model of servo valve prestage and the whole mathematical model of hydraulic servo valve
在對射流前置級驅動的伺服閥射流流場數值模擬的基礎上，用有機玻璃在偏導射流板原始尺寸的基礎上進行了擴大，製作了透明的偏導射流板，運用高速攝像機、液壓泵站等組成了可視化實驗系統，對射流流場的流速方向、渦流、氣穴等現象進行了多方位的觀測，並通過對接收管接收壓力的測試，對流場分析結果進行了驗證。Using the precious metal resistant to compression characteristic, forms the precise linear delivery valve, besides may not have the section adjustment pressure value, also is in the present market condition adjusts one of scope biggest controllers, material quality use wrought aluminum alloy manufacture
利用貴金屬抗壓特性，形成精確線性壓力閥，除了可以無段調整壓力值外，也是目前市面上調整范圍最大的控制器之一，材質使用鍛造鋁合金製造。The construction of conical nozzle is used by pump ' s delivery - valve, making use of the dynamic characteristics of conventional. short pipe to enhance injection pressure. there are three parameters of fuel injection system : response pressure, injection - advanced angle, injection valve bulge high degree, the best match was found by adjusting them
在油泵出油閥端，採取漸縮管結構措施，利用管路動態效應提高噴油壓力；對于噴油系統參數：噴油壓力、靜態供油提前角和油嘴凸出高度，三個參數進行調整試驗，找到它們的最佳匹配。The simulation shows that the valve throttle area should be little as possible but must be more than 40 % of pipe section area ; when the total length of pipe is same, and the flow quantity is enough, pipe before primary valve should be thin and long, and the pipe after primary valve should be thick and short, the upriver and downriver small pressure fluctuation will badly lead to waterdrammer pressure rising, and spending more time in establishing pressure and flow quantity
模擬表明，閥門過流面積在滿足大於管道截面積40 %的條件下應盡可能小;在管道總長一定並滿足流量要求的條件下，主閥前應採取長而細的管道，閥后則應採用短而粗的管道;上下游微小的壓力波動都會嚴重增大開關閥門引起的水擊，並使壓力、流量的建立需要更長的時間。First, the dynamic characteristics of pipe is simulated, the influence to waterhammer which is brought by the flow area of the valve, response time, the length of the pipe before and after the valve, the hydraulic pressure fluctuating in the trunk, and the high frequency pressure fluctuating in combustion chamber is analysed
首先對管道動態特性進行了模擬，分析了閥門過流面積、閥門作動時間、閥門前後管道的長度、貯箱壓力波動以及燃燒室壓力高頻振蕩等對管道動態特性的影響。Release the paint line pressure and switch off the power before doing maintenance with the sprayer or changing accessories
在保養噴漆槍或者更換配件之前，松開噴槍壓力閥並且關閉電源。Full size orifice - all series n388 valves have a full - size orifice to assure pipe size capacity. water passages are streamline to provide high water flow with minimal pressure loss
全通徑噴嘴-所有系列n388閥門都有一個全通徑噴嘴以確保管道口徑的通過能力。水流道為流線型，在壓降最小前提下實現高流量。The load method of the system is that installing a throttle ahead of a proportional overflow valve, and the throttle can prevent the effect of the pressure impulsion upon sensors and meters
本論文所述系統的加載方法是在比例溢流閥前裝一個節流閥，利用節流閥來阻止溢流閥產生的壓力沖擊對傳感器及儀表的影響。The jet noise theory is used to analyze noise produced during the opening period of the suction or discharge valves in a similar way, theoretical calculations are made
根據噪聲產生原理，指出降低噪聲的根本途徑是降低氣流通過氣閥前後的壓力損失，並給出降低氣流噪聲的主要途徑是：提出減小閥片剛性、厚度以及擴大排氣孔孔徑等。Shut off flow and relieve pressure before replacing the seat insert
在更換閥座鑲嵌件之前，關閉流體，減輕壓力。This paper analyses the type, function and characteristics of usual proportional control valves and raises a new modificative version in the light of their drawback. that is, basing on the principle of flow amplification and electrical feedback and throughout calculation and analysis on flow closed loop control and pressure flow combination., determination of the minimum controlled pressure difference as well as flow controlling range and structure of main valve and research of the dynamic and static characteristic, the paper puts forward control principle of " flow - load pressure change - displacement revision " and pressure / flow double closed loop, and further expounds that using a proportional controller and a electric mechanical transducer can separately serve the control function of pressure or flow as well as flow pressure combination
本論文分析了目前常用比例閥的類型、功能、特性，並針對其不足提出新的改進方案，即：以流量放大，電反饋兩個原理為基礎，通過對流量閉環控制及壓力流量復合的計算分析、確定上最小控制壓差及流量控制范圍，確定主閥結構、功能特性研究等，提出了「流量? ?負載壓力變化? ?位移修正」的控制原理和壓力流量雙閉環控制原理，並進一步論述了利用一個比例控制器和一個「電?機械轉換器」就可完成獨立的壓力或流量控制功能以及流量壓力復合控制功能。分享友人