液力損失 的英文怎麼說
中文拼音 [yèlìsǔnshī]
液力損失
英文
hydraulic loss-
Long - hole and geometrical proportion type of mixing unit is finally adapted in lpg supply system, and power and torque output of lpg engine are improved by increasing compression ratio, and ignition characteristic is tried to adjusted to satisfy engine performance. meantime emission performance and noise level of lpg engine at full - throttle and other various part - throttle operations are tested and compared with former gasoline engine. ( 3 ) it is verified by engine dyno tests that lpg engine has better synthesized performance at aspects of power and torque, fuel economy, as well as emission than former gasoline engine
選擇了等比例長孔式混合器控制空燃比;通過提高壓縮比來彌補動力性的損失;以動力性為主控目標,對最大功率點、最大扭矩點、中等轉速、最低轉速點所對應的發動機轉速做了點火特性的調節;通過空燃比的合理控制,直接改善發動機的動力性、經濟和排放指標;作為對缸內燃燒過程的理論分析,進行了燃燒特性的實驗測試;對原汽油機和新開發的液化石油氣發動機,進行了外特性和部分負荷特性以及怠速的排放及噪聲對比性測試。But thanks to the alcohol ingested during the process and the loss of vital fluids consequent on repeated acts of spitting, i usually feel drained and depressed afterwards
但在品酒過程中喝下的酒,以及其後反復吐口水所損失的生命液,通常都讓我在事後筋疲力盡而且抑鬱。Diesel - hydraulic locomotives are slightly more efficient than diesel - electrics, but were found in many countries to be mechanically more complicated and more likely to break down
這個是你錯了,對于內燃機車來說,液力傳動是比電氣傳動效率高的,因為內燃機所謂的電氣傳動不僅僅有電動機,還有發電機,都有效率損失。單純講電機和液力的話,無疑電機效率更高。Al2o3 coating is provided not only as insulation layer to decouple electrically the liquid metal flow from the load - carrying wall in the sake of the decisive reduction of pressure drop, but also as a barrier to reduce tritium permeation into structure materials
為減少液態金屬mhd壓力損失,分析液態余屬包層各種相關材料影響因素,在液態金屬流動管道內壁加以al _ 2o _ 3絕緣塗層達到電學和熱學性質上的絕緣,並起到相當好地氚壁壘效果。The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced
論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況,在回顧電梯液壓控制系統節能技術的基礎上,介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理,分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式;詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計,重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容;最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。But for real microfiltration, the distribution of shear stress on the membrane of the module with outside helical flow would have benefit to make smaller number of particles deposit on the membrane. ( 2 ) by means of orthogonal test and regression method, four new models, trans - membrane pressure model, flux model, trans - module pressure drop model, and efficiency model, were established, which roundly describe the performance of outside helical mf by depicting the flux, energy loss, and handling capacity simultaneously
( 2 )採用正交回歸實驗,在無顆粒沉積的理想情況下,建立基於層流數值解的膜器跨膜壓力損失模型、過濾通量模型、過膜器的壓力損失模型和膜器過濾效率模型,首次從通量、能量損失及膜器對料液的處理能力等三個方面,更全面地對外旋流方式下的微濾過程進行了描述。The present results indicate that the diamond element always yields the highest heat transfer, followed by cube and waterdrop pin - fin. however, the pressure drop for the diamond pin is higher compared to the cube and waterdrop pin - fin. arrays with geometric parameters x / d = 2. 7 elements generally cause the greater heat transfer and pressure loss than those with x / d = 3. 3 and x / d = 4
研究結果表明:鉆石形擾流柱排換熱最強,方形次之,液滴形最弱,相應地鉆石形擾流柱排壓力損失也最大,方形次之,液滴形最弱;小間距( x / d = 2 . 7 )在換熱較強的同時壓力損失也高於其他兩種間距。In order to save the energy, we analysed the loss of pressure caused by pipes and adopted measures to decrease the energy loss and increase the power usage rate
摘要對管道的壓力損失進行了分析,並在設計液壓系統管路時採取了減少能量損失的措施,提高功率利用率,以達到節能的目的。In the third chapter, the mathematical models of project system have been established, and simulation has been done on the simulink enviroment of matlab software kits. the simulation focus on the effects of main parameters on the dynamic characteristics of speed control system, and the main parameters include viscosity damp coefficient and friction torque of electrical motor shaft, internal leakage coefficient of pump / motor of hydraulic circuits, gas volume of pressure accumulator, viscosity damp coefficient of cylinder piston and different running building floors, etc. at last, theoretical research effects of the flow and pressure pulsation of pump / motor on car speed and oil volume leakage theory are discussed. the fourth chapter of this thesis concerns the research on the key items about hydraulic power control system according to the ens 1 - 2 and other hydraulic elevator standards
論文第三章針對組成系統的各個模塊進行了機理建模,並且通過matlab軟體中的simulink圖形化模擬環境進行了本課題系統的模擬研究,主要針對影響系統特性的主要參數變化,動態分析系統的輸出特性,在上下行工況中,分析了電機軸系粘性阻尼系數、軸系摩擦力矩、主迴路蓄能器迴路液壓泵馬達內泄漏系數、蓄能器氣體容積、液壓缸柱塞粘性阻尼摩擦系數以及不同運行樓層工況等參數對系統特性的影響;最後對軸向柱塞泵馬達的流量壓力脈動對電梯轎廂速度的影響和蓄能器內油液體積損失機理進行了理論研究。In chapter 3, the pressure pulse under the two situations of the system with and without damper is discussed at the basic of analyzing the flow rate pulse. then the conclusion that the system has filtering effect is drew after adding a damper in it, but its serious in power wastage because of adding a damper
第三章,在分析液壓泵流量脈動的基礎上,討論並對比了系統加與不加阻尼兩種情況下各自的壓力脈動,得出系統中加一個阻尼后,具有一定的濾波作用,但是當流量較大時,由於阻尼的存在,系統功率損失比較嚴重。After the introduction of the innovations and the improvements of foreign hydraulic shock absorbers, the profound cushion mechanics study is done aiming to the shock absorbers chosen for the thesis ; the cushion process of hydraulic shock absorbers can be divided into several stages, which include local pressure loss caused by across sectional area shrinking, sharp edge throttling and aperture throttling
在對國外新型液壓緩沖器的研究基礎上,針對本課題所選液壓緩沖器的結構特點,提出了分階段建立機理數學模型方法。將液壓緩沖器緩沖過程分為:由於流道斷面突然收縮引起的局部壓力損失階段,緩沖柱塞的邊緣和緩沖孔的邊緣形成銳緣節流階段,當緩沖柱塞進入緩沖孔中形成的縫隙節流階段等三過程。Since it has the advantage of no moving components, impulse signal output, strong medium adaptability, high measurement accuracy, wide measurement range, low - pressure drop, no zero drift and easy to maintenance, it is wide accepted that the vortex type fluid oscillatory flowmeter is ideal flowmeter in the measurement of gas, liquid, steam and mix / corrosive fluid
這類的流量計兼有無運動部件,脈沖數字輸出,計量不受被測流體性質影響,測量準確度較高,量程比寬,無零點漂移,壓力損失小,便於安裝維護等優點,是測量氣體,液體,蒸汽,混合型和腐蝕性流體的理想的流量計。According to the facts of chemical spill accidents in waterway transport, systematic analysis is made on the suitable dispersion models and source strength calculation models of multiple spilled substance, resource and environment respectively, so as to decide the poison and fire & explosion danger area of an accident through the way of dispersion simulation. to resolve the problem to the calculation of spill amount from tanks, calculation formulas on various types of tanks were worked out ; at the same time, research is carried out on the source strength calculation of mixtures with regard to the possible spillage of chemical mixture in waterway transport. for the sake of convenient application, a computer software for the simulation of dangerous area is developed which can provide great assistance to the decision - making of emergency response and reach the target of reducing the damage of the life, property and environment to the smallest degree
根據水運化學品泄漏事故的具體實際,針對各種泄漏物質、泄漏源和環境條件研究了各自適用的擴散模式和源強計算模型,以便通過擴散模擬確定事故的毒害和火災爆炸危險區域;為解決儲罐泄漏量計算困難的實際問題,推導了適用各型儲罐、液艙的泄漏量計算公式;針對化學品水路儲運泄漏事故中泄漏物質可能會以混合物形式存在的情況,探討了混合物的蒸氣釋放源強計算;為方便實用,開發了蒸氣擴散危險區域模擬計算機軟體,從而為事故應急決策提供了有力的輔助支持,以達到盡可能減少人員傷亡和財產損失,減輕環境污染的目標。The relationships among the rock permeability, water saturation and resistivity of weicheng oilfield in dongpu depression are studied by rock resistivity parameter testing and rock resistivity testing by water flooding. a comprehensive evaluation for water flooded reservoirs of 16 adjusting wells is carried out by using the testing results, by which the accuracy of interpretation is enhanced greatly
合理注采壓力系統是指既能滿足油田提高產液量的地層能量的需要,又不會造成原油儲量損失、降低開發效果的壓力系統.運用注采平衡的原理,對臨盤油田合理流動壓力、合理注水壓力和合理地層壓力進行系統研究,確定了該油田的合理的壓力系統,為今後油田開發提供了參考依據Furthermore, asymptotic techniques to analyze large hartmann parameter flow and interaction parameter flow are employed and an analytical model has been developed for the calculations of mhd pressure drop of liquid metal flow in a packed pebble bed
利用漸近線分析法對大hartmann參數流進行分析,給出了球床液態金屬溢流的磁流體動力學壓力損失的建模分析和計算結果。The purpose of this paper is to study the energy saving controls and controllability of excavators, which can reduce heat generation of hydraulic system and reduce fuel consumption, and improve the performance of excavator to achieve high quality work
本文主要研究挖掘機的節能性和操縱性,使其動力系統在各個環節上減少功率損失,最終達到減少液壓系統發熱、節約燃油的目的,同時提高挖掘機的工作性能。These include thyroid disease, depression with suicidal thoughts, seizures, acute heart or kidney failure, eye and lung problems, hearing loss, and blood infection
包括:甲狀腺疾病,自殺傾向,明顯的心、腎功能障礙,眼睛、肺部疾病,聽力損失,血液感染。The results show that the improved structure has obviously reduced pressure drop and increased axial speed of the nozzle, as a result the wallop of electroplating solution is improved and the thickness of diffused layer reduced, the electrodeposition process improved, and what is more, the coating structure has been compacted, crystalline particles fined and the performance improved
結果表明,結構改進后,明顯減小了壓力損失,提高了噴嘴的抽向速度,電鍍液沖擊鍍件的沖擊力得到提高,有效地減少了擴散層的厚度,改善了電沉積過程,而且使鍍層組織緻密,晶粒細化性能得到提高。Respective simulation of the liquid cooling system and the circulatory system of cooling fluid, which mainly concerns the simulation model of the four major components in the refrigerating system and the water pumps and heat exchangers in the cooling circulatory system. experimental research of the assembled system of liquid cooling system, which yields the system perform parameters of refrigerating capacity and resistance loss in different working conditions. collection and comparison of the experimental data got from simulation and experimental research, which proves simulation and the experiment result are well tallying, hereby, testifies the emulational veracity of the cooling system
主要對製冷系統中四大部件和冷卻液循環系統中的水泵、換熱器進行了數學建模;利用組裝的液冷源系統進行實驗研究,得到不同的工況下系統的製冷量、阻力損失等系統性能參數;對模擬和實驗研究中得到的大量實驗數據進行匯總比較,發現模擬和實驗結果吻合較好,驗證了液冷源系統模擬的準確性。According to the principle of hydraulic resistance loop sys tem, a method for obtaining the best transmitting parameters of hydraulic system s, is presented by transforming relevent pressure energy and energy loss on trans mitting road into all impedances of the transmitting road respectively
介紹了一種根據液壓阻力迴路系統學原理,通過把液壓系統中壓力能的傳遞和傳遞過程中的能量損失轉化為傳遞路線上所遇到的所有阻抗,提出了一種獲取液壓傳動系統最佳傳遞參數的方法分享友人