汽門 的英文怎麼說
中文拼音 [qìmén]
汽門
英文
porthole-
Valve seat grinding wheels : marking " vlvst
汽門座砂輪：統一標示vlvstValve cover gasket
汽門室蓋墊片Our company s main products are windshield wiper assemblies, generators, pneumatic pumps and assemblies and electric fuel pumps
公司主要產品有：內外擺門泵臥式刮水器大功率汽車發電機電噴燃油泵液壓汽門挺桿。The effluent conduit joints, fuel gas pipe valves, elevator brakes and such electromechanic products of ezhou sanwei casting co., ltd are exported to britain, the us and germany, etc. of which, the port tappets are exported to cummins which leads in power equipment manufacture worldwide ; pipe joints and valves are exported to the us mueller group which is the biggest supplier of such products in north america
鄂州三維鑄業有限公司所生產的出水管道接頭、燃氣管道閥門、電梯制動器等機電產品及汽車零部件出口到英、美、德等國家，其中汽門挺桿出口到世界領先的動力設備製造商美國康明斯公司，管道接頭及閥門出口到此類產品北美地區最大供應商美國mueller集團。The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。Secondary intake valve
次進汽門Primary intake valve
主進汽門The results of calculation and measures show that the low frequency of steam pipelines vibration fastens on 4. 3 to 4. 5 hz and 9. 5hz, the low modes fastens on one - steps curl in vertical plane and its plane of each steam pipeline and one - rotation along with the line connecting the port circling main steam gate and the horizontal port of unit. the modes of # 3 and # 4 main steam conduits occupy the majority of low steps modes ( the five of the first eight phases ), except for the first phase rotation vibration, the maximal distortion of other low steps vibration modes are all caused by the vibration of erect pipelines of cylinder
計算和實際測量結果表明：導汽管低頻振動以4 . 3 - 4 . 5hz 、 9 . 5hz頻率為主，管系的低階模態以各導汽管在垂直導管平面和平面內的一階彎曲、以及繞主汽門處端點與水平段汽機端連線的一階扭轉為主， # 3 、 # 4導汽管的振動模態占低階模態的多數（前八階模態中的五階） ，除一階扭轉振型，導汽管的其它低階振動模態中都是進汽缸立管的下端振動變形最大。Because deh system can use feedback signal of the first class pressure as practical power of turbine, it can avoid the reverse control, have the good ability of anti - disturbing. by the sophisticate control logic deh can make swift change of the control demand for following best value according to the circumstance, largely improved the dynamic characteristic when the unit sundenly discharge the full load
Deh系統控制器中的pid系數可根據試驗情況方便的調整，實現較好的動態特性，並可使調汽門動態過開，使再熱機組有良好的一次調頻能力； deh系統可採用調節級壓力做為汽輪機實發功率的反饋信號，避免出現反調現象，抗內擾和外擾能力強。Oil tempered chromium - vanadium valve spring quality wire and springs
油回火鉻-釩汽門彈簧優質鋼絲和彈簧Valve spring surge
汽門彈簧顫動Valve spring inner
內汽門彈簧Valve spring outer
外汽門彈簧The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller thermal expansion coefficient, lower in thermal expansion, fatigue durable, good elasticity, and reduces oil consumption so as to prevent instability while revolving at high speed and obtain perfect performance
鈦合金汽門彈簧比一般鋼閥材質更輕巧、熱膨脹系數小、熱量傳導擴散更低、耐疲勞、彈性佳、減少油耗，以阻止在高速運轉下的不穩定以獲致最完美的性能表現。The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller expansion coefficient, improves the tightness in inletting and exhausting, helps in complete combustion, and at the same time reduces noise, friction, oil consumption, vibration, and gas waste
鈦合金汽門比一般鋼閥材質的產品更輕化、膨脹系數小，于進、排氣時可提升它的氣密動作，幫助完全燃燒，同時減少噪音、摩擦、油耗、震動及廢氣。Valve seat grinding wheel
汽門座研磨砂輪The valve operating mode starts to change the moment the lift becomes zero
當生程一變成零，汽門操作模式就開始變換。Auto tyre valve
汽車胎的汽門Specification for aircraft tyre valves : interchangeability dimensions
飛機輪胎汽門嘴規范:互換性尺寸Valve - timing mark
汽門正時記號分享友人