现代起重机的特征和发展趋向外文文献翻译、中英文翻译

3.0 设计吧 2023-02-13 41 4 60KB 11 页 10光币

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The characteristics and development trends

of modern cranes

With modern science and technology is developing rapidly,

industrial production scale expansion and the increased automation,

cranes in the modernization of the production process more widely,

the growing role of the cranes require higher and higher. In

particular the electronic computer technology to a wide range of

applications, prompted a number of interdisciplinary approach in the

advanced design and promote a modern manufacturing techniques and

testing technology improved. Intense competition in the international

market is also increasingly rely on technology competition. These are

the technical performance of a crane to enter a new stage of

development, the crane is undergoing a huge transformation.

China is now at an unprecedented speed into the globalized

international market competition, China's crane manufacturing

industry faced with both opportunities and challenges of the new

situation. Therefore the constant development of cranes and

innovation is the key. Crane is now under the new domestic and

foreign theories, new technology and new trends, with examples,

briefly discussed the characteristics of modern cranes and

development trends.

1 key products, large, high-speed, durability and exclusive

As industrial production increased scale, increasing production

efficiency and production process of loading and unloading of

materials handling gradually increase the proportion of the cost, to

large crane or the demand for high-speed growth. From the weight of a

growing, increasingly high work rate and higher energy consumption

and reliability requirements. Crane has become automated production

processes in an important link. Crane will not only ease of use, easy

to maintain, easy to operate, and better security, fewer failures,

the average working hours of trouble-free longer. Reliability is an

international product market competition in the focus of many large

foreign companies have developed a reliable internal control

standards. China's crane to catch up with and surpass the performance

of the world's advanced level, the key is to improve the reliability

so that the cranes have excellent durability, trouble-free,

maintenance and use of economy.

Currently the world's largest floating crane from the weight of

6500 t, the largest cranes from the weight of 3000 t, the largest

bridge crane from the weight of 1200 t, automated warehouse stacking

the largest crane operating speed of 240 m / min.

Industrial production and the diversity of user needs, so that

the crane for the expansion of the market, the variety has been

updated to meet the special features specific to the needs of the

effectiveness of the best play. Metallurgical special crane,

explosion-proof, anti-corrosion, insulation and rail cranes, vessels,

vehicles for increasing the functions of a crane, continuously

improve performance, adaptability stronger than ever. Demag of

Germany developed an aircraft maintenance for cranes in the

international market opened the market. This span of the crane,

lifting height, stop-high accuracy. Below the installation of a car

lifting retractable rotary maintenance platform to reach any aircraft

parts. With the rapid development of world nuclear power plant, the

plant has been dedicated crane corresponding development, such as the

indoor ring reactor bridge crane work in the radioactive environment,

the pressure vessel for lifting the lid and the reactor components

and other dangerous load, high reliability requirements, Security

good, accurate positioning and can automatically slow

decentralization, and other items, and various protection devices and

special safety devices.

2 series modular, combination, standardization and practical

Crane is a many-volume series of products, systems using multi-

objective optimization methods of the overall design has become a

series of crane development priorities, through full consideration to

performance, cost, technology, production management, maintenance and

use of bulk manufacturing, and other factors on the main series

Reasonable parameters match, so as to achieve improved performance.

Lower manufacturing costs and improve the general level, with less

specifications of the components of many varieties, multi-standard

products to fully meet user demand.

With modular design instead of the traditional design, a crane on

the basic functions of the same components, parts and components made

from a variety of purposes, have the same connection elements and

interchangeable modules, through a combination of different modules

to form Different types and specifications of the crane. To improve

the crane, just for a few modules. Design a new crane, just choose

different modules re-combination. Since raising the general level,

will enable small-batch production of products to a considerable bulk

into the module production, high efficiency of specialized production

and reduce manufacturing cost. Less able to form the module, a

combination of many more species of crane specifications to meet

market demand, increase competitiveness.

Demag of Germany production overhead crane fully consider the

combination of modular and so that the series with two, institutions,

parts and components in each other's parameters match, the ability to

achieve the most economical and reasonable distribution with the

results. From the use of weight lifting and speed of the product is a

constant way to or from the main body parts to achieve the maximum

common. Then the rate changes through the pulley derived more

specifications. 5 ~ 125t bridge crane series, a variety of working-

level, just four kinds of car-lifting. The company developed the

standard wheel box module series, have above-connected group,

optional different models of the drive unit can be assembled into

vehicles, and pieces of metal structures used for various

combinations after the bridge, gantry crane , Lane Stacker cranes or

other lifting transport-rail line running the mechanical machinery,

its wheels are a variety of forms for the Selection of tread. Because

of distance without restrictions, combined flexible, widely used. The

company's standard-beam module series has commercialization, with the

main beam by friction between the ring and high strength bolts of

connections and improve the accuracy of interchangeability and size,

a decrease of Jie Hemian the processing volume. And one of the main

beam can be quickly and effectively phase grounding. That apply to

single-beam or two forms of dual-beam-beam modules, according to the

weight from the span can be identified and applied-beam models.

Crane foreign experts recently estimate that there will be 20

percent to 30 percent of the cranes need to install the automated

system.

5 sets of product mix, systematic, complex and information

In stand-alone automated crane on the basis of the various

computer lifting the transport machinery to form a material handling

system integration, through the control of the central control room,

with the organic integration of production equipment, production

systems with coordination. Such crane high degree of automation,

with information processing capabilities that can be detected by the

sensor implementation of various kinds of information storage,

computing, logical judgement, such as processing transform

processing, then sent to the implementing agencies control

instructions. Such crane also has good information input and output

interfaces, full of information, accurate and reliable in the entire

material handling system of transmission.

Production of construction machinery of the U.S. Caterpillar

company to purchase the metal structure of a plant to bridge crane

mainly of material handling systems automatically for the steel shot

peening processing, automatic cutting and the storage of automatic

loading and unloading transport operations, than the original single

Hands-on work efficiency improved 65 percent. Japan's Toshiba

Hamamatsu Kawasaki factory overhead crane used by the automatic

transmission system composed of materials to processing online

flexible handling of the fixture and parts, machine tools for the

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摘要：

ThecharacteristicsanddevelopmenttrendsofmoderncranesWithmodernscienceandtechnologyisdevelopingrapidly,industrialproductionscaleexpansionandtheincreasedautomation,cranesinthemodernizationoftheproductionprocessmorewidely,thegrowingroleofthecranesrequirehigherandhigher.Inparticulartheelectroniccomputer...

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