EM165柴油機機體機械加工工藝及其組合機床鉆孔夾具設計含8張CAD圖,em165,柴油機,機體,機械,加工,工藝,及其,組合,機床,鉆孔,夾具,設計,cad 外文文獻 One. A foreword Development of diesel engines has been a hundred years of history, to the production of human life brought extraordinary convenience, but also to the development of human society provided the impetus extraordinary. In the development process more than a century, the diesel technology has appeared three times a qualitative leap. In industrialized countries, essentially all trucks use diesel engines. In recent years, with the diesel engine turbocharged, intercooled, direct injection, exhaust gas catalytic converters and particulate traps and other advanced technology, diesel emissions have reached the Euro Ⅲ, Ⅳ emission standard in Europe, and thus set off a car engine of climax, Volkswagen AG, General Motors, Toyota Motor Corporation and other large auto companies also used diesel cars. In a growing shortage of oil resources, the development of diesel vehicles will be one focus of future automotive industry. According to the National Automobile Development Plan, "fifth" period, diesel cars accounted for the proportion of total output in 2000 from 29.7% to around 35%, in the car to achieve full of diesel. At present, China diesel cars, diesel mini-vehicle production has just started, Volkswagen has developed a Jetta, Bora diesel cars in the domestic part of the city market. Diesel engine compression ratio, high thermal efficiency, its fuel consumption is 30% lower than gasoline to 40%, plus diesel and motor gasoline and low processing costs compared to 5%, with the world's universal attention to energy-saving cars , automotive diesel engine development is the trend of the global automobile industry. In addition to lower fuel consumption than the gasoline engine, the diesel and gasoline engine also has the power compared to large, long life and good dynamic performance, it produces greenhouse emissions 45% lower than gasoline, carbon monoxide and hydrocarbon emissions are also low, but its Nitrogen oxide emissions slightly larger than the gasoline engine, large emissions of harmful particles. Two. EM165 diesel engine uses: ????EM165 diesel land available, with pulleys, couplings, clutches as agricultural irrigation, generators, welding machines, air compressors, pumps, crushers and construction machinery, such as power; while marine, coupled with inverted car clutch. After the reduction gear box, power can be used as fishing vessels, inland waterways host and auxiliary vessels. Three. EM165 diesel engine structural features: 1. the body: the cylinder block and crankcase cast as a whole, on both sides of the inspection hole, the wet cylinder liners, made of ductile iron, good wear resistance. 2. Crankshaft: The ductile iron, after normalizing to improve the mechanical properties, good wear resistance. 3. cylinder heads: each cylinder heads, intake and exhaust ports are placed on one side, the other side is equipped with injection machines, cylinder head made of cast iron. 4. 45 # steel rod with forging, the shaft is H, the bulk of the flat incision. 5. the piston is made of aluminum alloy. Equipped with three gas rings and two oil rings, the first ring of porous chrome, piston pin for high-quality steel carburizing, hardening the surface. 6.valve train, intake and exhaust valves for the heat-resistant steel, ductile iron camshaft. 7. lubrication system Pressure splashed oil pump gear pump for the grade. 8. the governor of the mechanical centrifugal whole program. 9. with a single fuel injection pump, fuel injector for the hole axis inclined. Fourth. the current situation and development of diesel engines: ???? Early seventies, and for the first time by the introduction of emission regulations affecting the world oil crisis, diesel fuel and low HC, CO emission characteristics of attention once again, the industry began to research and development of a new generation of diesel engines, designed to improve engine power performance and reduce emissions and noise and vibration. This provides new opportunities for application in diesel cars. Simultaneous development of world science and technology development, especially in electronics, precision machining, and testing of new materials such as high-tech equipment for the realization of this opportunity to provide technical possibility. 20 years thereafter, new combustion engine, direct injection combustion system, turbocharged and intercooled, electronically controlled high pressure injection, EGR valve structure and four other new technologies have been developed to the extent practical, diesel exhaust after treatment technology and high-quality diesel The development is also made substantial progress. Modern automotive diesel engine has excellent overall performance high thermal efficiency, high power, high torque and low fuel consumption, low emissions, low noise: liter power increased by more than 15%, direct injection diesel engine fuel consumption by 20% to 30% lower than gasoline , emissions meet Euro III ~ Euro IV standards, the overall greenhouse gas emissions 45% lower than gasoline, but also basically reached the level of noise and vibration gasoline. Thus significantly speeding up the process of commercial vehicle diesel fuel, diesel cars get widely used. ??? ?China joined the WTO, the World engines and parts production has shifted from the high-cost areas to low-cost regions. Therefore, at present in China has established a number of engine parts foreign, including: electronic control systems, pump nozzle, turbocharger, electrical appliances, pistons, piston rings, bearings, cylinder head castings and body filters and other products in the field . The use of foreign resources to make up for a lot less than the internal combustion engine technology and equipment parts industry, and promote the product upgrade key components, but also for the car to provide better conditions by improving the level of diesel technology. Prominent changes in technology development is centered around the theme of environmental protection and speed up the electronic controls, high-pressure injection, application and development of direct injection combustion chamber, turbocharged and intercooled, and other advanced technology, the Chinese automotive diesel engine on a new technological level level. ???? But compared with foreign car behind China in general 10 to 15 years with a diesel engine products, product variety is also "missing car less heavy", key components such as the fuel injection system is still seriously hampered the development of the whole product. Emission regulations in China is growing at about 5 to 8 in Europe later in the speed propulsion, from Europe to achieve the Euro II to III, IV across Europe still faces many difficulties. A large gap between the level of foreign reserves mainly due to lack of technology. Because of funding, management mechanism and means of scientific research and other reasons, the Chinese diesel engine industry leading international and master the key technology is not enough, not strong independent development capacity, more difficult to be innovative and breakthrough. Fifth. the technology development of the diesel engine ????The 21st century is the era of science and technology and the era of highly developed productive forces, but also full of challenges and opportunities. The world auto industry continues to face global environmental pollution and scarcity of oil resources and other issues, the United States, Japan and European countries regard "to reduce vehicle pollution impact on the environment and energy conservation" as cutting-edge issues in the 21st century automotive technology, but also to solve the problem pathway has also been a consensus, which is the "three arrows shot" - such as the future development of fuel cell-powered, clean fuel engine development, and improve the development of diesel engines, gasoline engines. For automotive diesel engine, the key direction is to further reduce fuel consumption, NOX emissions and particulate emissions to meet future more stringent fuel consumption regulations and emissions regulations. Emphasis on future technology development will further optimize the combustion process, the development of more effective and practical rear exhaust treatment systems, and the introduction of new low sulfur fuel. China should be the basis of the current research projects have been carried out on the combustion chamber of direct injection, four-valve, turbocharged and intercooled, more in-depth study of electronically controlled high pressure injection and EGR, etc., as soon as possible to grasp the extent practical. While a study to develop diesel exhaust after-treatment system. The oil industry should be developed with low-sulfur diesel. In terms of development approach, product development and technology development combined with industry, academia, research integration, self-development and international cooperation, the introduction of the combination.  中文譯文 一、前言 柴油機的發(fā)展已經有一百多年的歷史，給人類的生產、生活帶來了非凡的便利，也給人類社會的發(fā)展提供了不同凡響的動力。在一個多世紀的發(fā)展過程中，柴油機技術先后出現了三次質的飛躍。 在工業(yè)發(fā)達國家，載貨汽車基本上全部使用柴油機。近年來，隨著柴油機采用渦輪增壓、中冷、直噴、尾氣催化轉換和顆粒捕集器等先進技術，柴油機排放已達到歐Ⅲ、歐Ⅳ排放標準，因而也掀起了小轎車柴油機化的高潮，德國大眾汽車公司、美國通用汽車公司、日本豐田汽車公司等大型汽車公司的小轎車也采用了柴油機。 在石油資源越來越短缺的我國，發(fā)展柴油車將是未來汽車工業(yè)的重點之一。根據國家汽車發(fā)展規(guī)劃，“十五”期間，柴油車占汽車總產量的比重要從2000年的29.7%提高到35%左右，中型車要全部實現柴油化。目前我國柴油轎車、柴油微型車生產剛開始起步，一汽大眾已經開發(fā)出捷達、寶來柴油轎車，在國內部分城市上市。 柴油機的壓縮比高，熱效率高，其燃料消耗量比汽油機低30%~40%，加上車用柴油與車用汽油相比加工成本又低5%，隨著世界各國對汽車節(jié)能的普遍重視，汽車發(fā)動機向柴油機化發(fā)展已是全球汽車工業(yè)發(fā)展的大趨勢。 除燃料消耗量比汽油機低外，柴油機與汽油機相比還具有功率大、壽命長、動力性能好的特點，它排放產生的溫室效應比汽油低45%，一氧化碳與碳氫排放也低，但其氮氧化物排放略大于汽油機，有害顆粒排放大。 二、EM165型柴油機的用途：? EM165柴油機陸用時，配以皮帶輪、聯軸器、離合器作為農業(yè)排灌、發(fā)電機、電焊機、空壓機、水泵、碎石機及建筑機械等動力；船用時，配上倒順車離合器。減速齒輪箱后，可用作漁輪船動力，內河航運主機及輪船輔機。 三、EM165型柴油機的結構特點：? 1、機體：汽缸體和曲軸箱鑄成整體，兩側有檢查孔，汽缸套為濕式，用球墨鑄鐵制成，耐磨性好。? 2、曲軸：用球墨鑄鐵制成，經正火處理后，提高了機械性能，耐磨性好。? 3、汽缸蓋：每缸一蓋，進排氣道都安置在一側，另一側裝有噴油機，缸蓋用鑄鐵制成。 ? 4、連桿用45#鋼模鍛而成，桿身為工字型，大頭為平切口。? 5、活塞用鋁合金制成。裝有三道氣環(huán)和二道油環(huán)，第一環(huán)為多孔鍍鉻，活塞銷為優(yōu)質鋼滲碳，表面淬火。? 6、配氣機構，進排氣門為耐熱鋼制成，凸輪軸用球墨鑄鐵。 7、潤滑系統(tǒng)為壓力飛濺復合式，油泵為等級齒輪泵。 ? 8、調速器為機械離心全程式。? 9、用單體式噴油泵，噴油器為單孔軸斜式。 四、柴油機的現狀與發(fā)展：? 七十年代初，受世界石油危機和首次出臺廢氣排放法規(guī)的影響，柴油機省油和低HC、CO排放的特點再度受到關注，工業(yè)界開始了新一代柴油機的研究開發(fā)，旨在提高柴油機動力性并減少廢氣排放和噪聲振動。這為柴油機在轎車上的應用提供了新的機遇。世界科學技術的同步發(fā)展，尤其是電子技術、精密加工、新材料和測試裝備等高新技術的發(fā)展為實現這個機遇提供了技術可能。其后20多年，柴油機新燃燒方式、直噴燃燒系統(tǒng)、增壓中冷、電子控制高壓噴射、EGR和四氣門結構等新技術均已發(fā)展到實用程度，對柴油機排氣后處理技術和優(yōu)質柴油的開發(fā)也取得實質性進展。? ???? 現代車用柴油機已具有高熱效率、高功率、高扭矩和低油耗、低排放、低噪聲等優(yōu)良的綜合性能：升功率增長超過15%，直噴式柴油機燃油耗比汽油機低20%~30%，廢氣排放達到歐III~歐IV標準，溫室效應氣體排放總體上比汽油機低45%，噪聲振動也基本上達到汽油機的水平。因而商用車柴油化進程明顯加快，柴油轎車獲得推廣使用。 中國加入WTO，世界發(fā)動機及其零部件生產也由高成本地區(qū)向低成本地區(qū)轉移。因此，目前在中國已建立了一批內燃機零部件外資企業(yè)，包括：電控系統(tǒng)、油泵油嘴、增壓器、電機電器、活塞、活塞環(huán)、軸瓦、機體缸蓋鑄件和濾清器等產品領域。對國外資源的利用彌補了內燃機零部件行業(yè)技術和裝備的諸多不足，促進了關鍵零部件的產品升級，也為車用柴油機技術水平的提高提供了更好的條件。在技術發(fā)展方面的突出變化是圍繞環(huán)境保護的主旋律而加快了電子控制、高壓噴射、直噴燃燒室、增壓中冷等先進技術的應用和開發(fā)，使中國車用柴油機的技術水平上了新的臺階。? 但中國車用柴油機產品水平與國外相比總體上落后10~15年，產品品種還“缺轎少重”，燃油噴射系統(tǒng)等關鍵零部件仍嚴重制約整機產品的發(fā)展。排放法規(guī)方面中國正以大約遲于歐洲5~8年的速度推進，要實現從歐II到歐III、歐IV的跨越還面臨不少困難。與國外水平差距較大的主要原因在于技術儲備不足。由于經費投入、管理機制和科研手段等多種原因，中國柴油機界對國際柴油機的領先和關鍵技術掌握不夠、自主開發(fā)能力不強、更難以有所創(chuàng)新和突破。 五、柴油機的技術發(fā)展方向? 21世紀是科學技術和生產力高度發(fā)展的時代，也是充滿挑戰(zhàn)和機遇的時代。世界汽車工業(yè)繼續(xù)面臨全球環(huán)境污染和石油資源匱乏等問題，美國、日本和歐洲各國都把“降低汽車污染對環(huán)境的沖擊和節(jié)約能源”列為21世紀汽車技術的前沿問題，而且對解決問題的途徑也有所共識、也就是“三箭齊發(fā)”－燃料電池等未來動力的開發(fā)，清潔燃料發(fā)動機的開發(fā)，以及柴油機、汽油機的改進開發(fā)。對車用柴油機而言，重點方向是進一步降低油耗、NOX排放和顆粒物排放，以滿足未來更嚴格的燃油耗法規(guī)和排放法規(guī)。今后技術開發(fā)將重于進一步優(yōu)化燃燒過程、開發(fā)更為有效和實用的排氣后處理系統(tǒng)以及采用新的低硫優(yōu)質燃料。 ???? 中國應在目前已經開展的研究項目基礎上，對直噴燃燒室、四氣門、增壓中冷、電控高壓噴射和EGR等進行更深入的研究，早日掌握到實用程度。同時展開柴油機排氣后處理系統(tǒng)的研究開發(fā)。應配合石油業(yè)界進行低硫柴油的開發(fā)。在開發(fā)途徑方面，產品開發(fā)與技術開發(fā)相結合，產、學、研相結合，自行開發(fā)與國際合作、引進相結合。