机械专业毕业设计外文翻译现代工程机械行业的技术进步.docx

1、机械专业毕业设计外文翻译现代工程机械行业的技术进步中英文翻译英文原文： Modern construction machinery industry of technical progressLarge-size mechanical mining excavator is used widely in international and domestic engineering construction and mining performance, and its property defines the efficiency much.Now because the internatio

2、nal market is opened step step, how to promote the quality of excavator is the key that a factory reinforces its competing force.In our country，the designing elevation and production quality on excavator can not keep up with international advanced technology applying on excavator.Now the advanced te

3、chnology has already applied advanced designing method on excavator designing，such as electronic simulating theory，dynamic design， reliability design and so on.But in our country ,the most excavator design has still applied the traditional design method ,the modern design method has not began to be

4、actually applied .The prime display is that the capability of self-design is not enough and the basic work has not done perfectly especially the excavator kinetics .The construct of excavator is very complex and the multiple movers often work simultaneously.at the same time its working environment i

5、s very bad and the eternal load varies randomly.As a result ,when designing the new product of excavator ,in order to ensure the performance safety，the designer not only has the basic theory analysis on static load computing ,but also do necessary work about the kinetics of mechanism to qualify the

6、dynamic reliability in the period of designing .Trough the kinetic analysis ,the load property of all the elements in excavator can be decided so as to design reliable product .From the 1980s of the 20th century to the beginning of this century. Chinese and foreign engineering machinery technology p

7、roducts come from a maturity period of modernization along with a new technological revolution, Mechanical engineering products integrated technology to a new level. Electronic technology, micro-computer, sensors, electro-hydraulic servo control system integration and transformation of the tradition

8、al mechanical engineering products, Computer-aided design and computer-aided manufacturing and computer-aided management of construction machinery and equipment manufacturing, IT network technology equipment, construction machinery sales and information transfer systems, thus enabling people to see

9、a brand new construction machinery industry. New construction machinery products in the efficiency and operational quality, environmental protection, performance and automation are many areas due to the past. and toward the further robotic and intelligent direction. 1、 operating principles of Innova

10、tion : groundbreaking new law with the high-frequency vibration With scientific and technological research in the development, engineering machinery operating theory is constantly innovating. Operating mechanical engineering principles, including the cutting of earth, broken ground on the screen geo

11、textile material, mixed with heating, right mixture of paving, leveling and compaction, etc. These operations Jimmy initially bionics and Newtonian mechanics-based, Modern science and the development of engineering machinery operating principle of laying the foundation for innovation. For example, m

12、echanical vibration and pulse jet, the photoelectric effect and thermal physics, the application of mechanical engineering to save resources and improve the quality of construction improve production efficiency, reliability and driving comfort and a degree of automation to create conditions. Excavat

13、ors, bulldozers, loaders, and other earthmoving machinery cutting groundbreaking project, we had no struggle milling, high-frequency vibration, Liquid gas jet method and porous ground breaking law. Groundbreaking use of the new operating principle of transformation to a bucket, can loosen the soil e

14、xcavation for the high-intensity rock, Under normal circumstances can reduce the unit cost of earthwork and improve production efficiency, and the soil near the building when substitute bored-blasting method. Vibratory Roller is a mechanical vibration and have reached a sluggish vibration to operati

15、onal effectiveness of the most powerful note. High-frequency vibration compaction technology is the application of modern dynamics in the mechanical engineering important research results, In vibratory roller simultaneously with the application of vibration isolation theory. 90s of the 20th century,

16、 there have been a level of vibration (vibration) and vertical vibration directional vibration compaction method, and an AM-vibration and different from the harmonic vibration of chaotic vibration vibratory compaction operating principle, and the formation of the corresponding series of vibratory ro

17、ller. Impact Roller broke the existing traditional cylindrical roller structure, Use 3-5 edge with the pressure roller polygon dragged by a tractor, 2-3 times per second in order to impact on the ground. This has dramatic impact on the seismic wave propagation characteristics, the depth of compactio

18、n several times with the RCC and incremental, 5m in the depths of the degree of compaction of up 90%-92%. Impact Roller is static shock, vibration and rub it smashes the comprehensive role for large fill, Collapse dry sand and soil filling the compaction. Asphalt paver Weiping equipment is operating

19、 principles of mechanical engineering innovation typical example. Fung plate diesel, liquefied petroleum gas or electric heating and 60 Hz frequency of vibration, and using infrared, ultrasonic or laser leveling, is a multidisciplinary high-tech applications. This leveling the technology can be appl

20、ied to the ground plane, as amlodipine or fine leveling the slope. Transfer frequency mechanical vibration is also commonly used for drilling, stone crushing and sieving and Shen pulling piling works. The stone drying can use diesel, fuel oil and coal combustion of various fuels on the asphalt from

21、the barrel, heating and asphalt mixture, stirring and insulation process is the full use of thermal theory of physics. Asphalt emulsion and some are modified chemical reaction physical specific application. 2、drive innovation : universal hydraulic and electric drive Hydraulic drive in the 20th centu

22、ry, the 1960s applied to the roller, only 10 years on the time has been spread and popularize. Now roller travel, vibration, steering and braking systems has achieved the full hydraulic drive. Hydraulic drive greatly simplified the roller drive and control system design, hydraulic drive a smooth, co

23、nvenient manipulation effort, easy to achieve variable speed and automation, in general, improve the production efficiency of roller compaction and quality. Now foreign markets have seen very little mechanical transmission of the roller.Hydrostatic drive technology in the 1970s began to use bulldoze

24、rs, and will soon be extended to a number of small and medium bulldozers and loaders, the United States John Deere, Caterpillar, Germany Bohai benefit companies and Dole produced by Komatsu of Japan has production and sales pushed Temple hydraulic machines and loaders. Hydrostatic drive not to use h

25、ydraulic torque converter, which dispense with the left lane and brake parts and mechanical drive, use of a safety valve on mechanical and hydraulic systems overload protection, and the index of smaller power play biggest index, its remaining power available in the auxiliary machinery operation. Ger

26、man company Deutsche mark and Lee Bohai Fall of other public companies in 1954 and in 1955 took the lead in developing a hydraulic excavator , but the hydrostatic transmission in large excavator is the popularization and application of the 1970s. Since the early 1980s, excavators and subdivided, is

27、gradually realized - powered, rotary and the hydraulic excavator of. In the international market excavators, were all eliminated various mechanical drive. Late history of the birth of the road is more mechanical hydraulic drive-based, such as paver, soil stabilizer, Pavement milling machine, hydraul

28、ic transmission smoothness help improve the quality of the roads paved. Drilling in the car and drilling machines, hydraulic transmission has replaced the previous aerodynamic, Wheeled modern cranes and machinery also piling work to the whole in the direction of hydraulic development. Electricity in

29、 industrial production while the application has a long history, but in mobile machinery is seldom used. This is because, firstly, to the motor capacity of, a motor with the same power as compared to the hydraulic motor, its weight and bulk to good times, to the machinery space layout brought great

30、difficulties. In addition, the efficiency of electrical transmission over low efficiency and consumption of a large volume of non-ferrous metals. But electric drive can be well realized variable speed, braking and electrical power streaming - Drive more convenient and easy to large tub, large excava

31、tor and large loaders, engine-generator-electric wheels will transfer power. Germany Vogele also been developed for electric power will transfer wheel. Germany Vogele also been developed electric drive an asphalt paver, the aircrafts systems are all rotary motor driven electricity, Only Hopper CDCC

32、and comfort slab leveling tank still use hydraulic transmission. The other is the regional mobile operations in the smaller mining site, the use of electric drive large excavator loaders, Such use of electric drive power transmission cables without the engine installed on the machines.3、ergonomic in

33、novations : a people-oriented and simplified operation 1980s of the 20th century, Many of the worlds largest engineering machinery manufacturing company has invested considerable human and financial resources for modern design methodology of the research and used. Ergonomics is a people-oriented design, with emphasis on the machines mutual co