short valve 中文意思是什麼
short valve
解釋
短路閥-
First, it is compressible and cushiony ; second, it can be transported to a long distance with a little power loss ; the last, its flux and velocity of flow are quite high, so the reaction time of the operators can been considerably shortened. aiming to solve the problems of vibrating machinery such as short life - span, poor cushion and high energy consumption, the writer, on the basis of characteristic of pneumatic mentioned, contrives a set of valve controlled pneumatic vibrator, which has larger output vibrating force and longer life - span with simple structure. then, it is applied to drive a vibrating screen and the result is fairly well
文中針對氣動技術本身的特性及優點，如：可壓縮，具有緩沖性；能耗損失小，便於遠距離輸送；流量大、流速高，執行元件響應速度快等，以解決振動機械在應用過程中的緩沖、能耗以及使用壽命等問題為目的，設計出一套輸出激振力大、結構簡單、使用可靠的閥控氣動激振器，並將其成功地運用到振動篩上，取得了較好的效果。 -
This paper supplied a new way through variable frequency variable speed ( vfvs ) to change its output flow rate and adding a constant - pressure - drop valve, which could solve the defects in hydraulic pressure servo control system, such as low efficiency in control system, short life, poor ability in resisting pollution, low efficiency in driving system and flow rate, pressure pulse. and this way was proved to be effective
本論文針對傳統伺服控制系統效率不高、元件壽命短、抗污染能力差、驅動系統效率低、存在流量及壓力脈動等缺陷，利用先進的交流變頻調速技術改變液壓泵轉速的容積調速新方法，提出了在液壓系統中加一個定差減壓閥的新思路，較好地解決了液壓伺服系統存在的上述問題。 -
In addition, the characteristics of er fluids such as short response time, low power consumption, smoothness of operation and mechanical simplicity, er fluids have been considered for various applications in mechanical engineering for electromechanical couplingdevices such as an engine mount, shock absorber, clutch, er valve, robotics arm and several control system during the past decades, studies on er fluid materials were focused on those of inorganic oxides and organic polymers
電流變液作為一種新型智能材料，其力學、電學、光學性能可由外加電場連續調控，這一特性使得電流變液在液壓系統、減振裝置、印刷、光學以及機電一體化等領域具有廣闊的應用前景，成為仿生智能科學的首選材料之一。在過去的幾十年間，電流變液材料的制備主要集中在無機氧化物和有機聚合物。 -
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。 -
Sav short air valve
短路空氣閥 -
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。 -
Life is the main factor restricting air valve and spring - loaded valves quality, the general long - term continuous operation of the compressors to life 80 hours ; for mobile, short - term or intermittent operation of compressors, may require slightly more
限制氣閥壽命的主要因素是閥片及彈簧質量，一般對長期連續運轉的壓縮機，希望壽命達8000小時以上；對移動式、短期或間歇運轉的壓縮機，要求可稍低些。 -
Currently, china ' s production of a common valve leakage, which leak, visual quality is not high, short life, and not flexible operating valves and electrical devices such as pneumatic devices unreliable shortcomings of some products, only the equivalent of the early 1980s, the international standard
目前我國企業生產的各種閥門普遍存在著外漏、內漏、外觀質量不高、壽命短、操作不靈活以及閥門電動裝置和氣動裝置不可靠等缺點，部分產品只相當于上世紀80年代初的國際水平。 -
The paper analyzed the struture of the tri - eccentric butterfly vavle at length, defined the tri - eccentric butterfly valve, educed the geometry function and its characteristic about the section of the butterfly disc. the results indicate : the parallel contour line across butterfly disc thickness is normal ellipse, thereby eslablished function relations between its geometry parameters ( long axis and short axis ) of three primary sections of the butterfly disc and the tri - eccentricity ; in order to avoid interference between the butterfly disc and the valve seat as well as the valve body, combining the torque, we obtained the feasible range about the rotation center of the tri - eccentric butterfly vavle
本文主要分析了三偏心蝶閥的結構，給出了三偏心的定義，推導出了蝶板截面的幾何方程及其性質，結果表明，沿蝶板厚度的平行截面輪廓線為標準的橢圓形，進而推導出了蝶板幾個主要截面的幾何參數（長軸、短軸）與三個偏心之間的函數關系；考慮到蝶板啟閉過程中避免與閥體及閥座發生干涉，結合蝶板的啟閉扭矩，確立了三偏心蝶閥回轉中心的適宜區域。 -
Check valve and butterfly valve combinations are very popular ; normally a short spool piece is required between the valves
止回閥和蝶閥組裝是很常見的，通常需要在閥門之間增加一段短管。 -
Nibco uses short strand fiberglass as a reinforcement for our mid - range ball valve products. adding reinforcement increases the pressure containing capabilities of tfe by reducing its tendency to cold - flow
在美國尼伯科中檔球閥產品中，採用短束玻璃纖維作為強化材料。增加強化材料能夠增加tfe的壓力包容能力，降低冷變形傾向。
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