外文翻译液压支架的发展与前瞻精品.docx

1、外文翻译液压支架的发展与前瞻精品英文文献Hydraulic supports development and perspective1 domestic and foreign hydraulic support development outlineThe hydraulic support is take the high-pressured liquid as a power, by certain hydraulic element (cylinder, pipe accessory) one kind of support and the control roof mining co

2、al working surface equipment which becomes with some steel work combination. Has the intensity to be high, the traveling speed is quick, supports and protections performance good, safe reliable and so on characteristics. Since the 20th century 50s, the hydraulic support has become the mining coal wo

3、rking surface core equipment gradually, in the world mainly produced the coal country to put in the massive manpower and resources and the financial resource carries on the research development to it. At present, tends to be mature take the hydraulic support as the main body supports and protections

4、, in the world already the manufacturing several hundred kind of frames and the up to ten thousand kind of models hydraulic support, meets each kind of coal bed mining supports and protections need.On the century 60s, our country once had also developed 10 kind of hydraulic supports, for various rea

5、sons has not obtained the promoted application, the hydraulic support is in the development, the laboratory stage; the 70s from Britain, Germany, Poland, the former Soviet Union and so on mainly produce the coal country to introduce several 10 set of hydraulic supports successively. After the unceas

6、ing exploration, the use, the digestion and the summary, make each type the support, it is the beginning which the domestic product hydraulic support develops; the 80s hydraulic support research and development are in the innovation to enhance the stage, develops 30 kind of new frame one after anoth

7、er, makes the ZZ series, the XY series, the ZD series and so on different specification, and widely uses in the state-owned large and middle scale coal mines, obtains the good economic efficiency; 90s special hydraulic supports development obtains the rapidly expand, the mechanized shop net support,

8、 the water granulated substance backfill support, the reason support, the force support, puts goes against the coal support and so on to be published one after another; The present century along with the computer technology, the automated technologys popularization and the application, hydraulic sup

9、ports control makes the breakthrough progress, gradually to the programmed control, the numerical control, the remote control and the automated control makes great strides forward.2 Domestic and foreign hydraulic support differenceThe domestically produced support in the technique of manufacture, th

10、e material quality performance, the processing craft, the control system and in the sealing property compares with the overseas advanced countries has the very big disparity.2.1 Processing manufacture aspectAccording to the related synthesis picks the engineers and technicians to reflect that the do

11、mestic product hydraulic supports processing technology, the service life, the operational performance, used the material quality so far not yet to achieve in 1979 to introduce 100 set of supports technical levels. If structural material: Germany uses the ST52 material its yield strength is 500 MPa,

12、 but our country uses 16 Mn material yield strength is only 350 MPa; Valve class: Overseas has used the copper alloy valve shell and the high strength stainless steel valve core, our country has been the 45# steel adds the superficial heat treatment; In processing craft: The overseas cylinder endoph

13、ragm is duplicate plates, the domestic product for does not plate, causes the column premature to present the spot in the use process, scratches and so on seals to leak the fluid phenomenon, affects the supports and protections effect. The domestic product hydraulic support and the overseas producti

14、ons hydraulic support compares the average to reduce 23 service lives.2.2 Control system aspectThe domestic product hydraulic support control systems research and development are at backwardness condition, restricted the support to move seriously supposes the speed the enhancement and the synthesis

15、picks the economic efficiency the display. In the world several mainly produce the coal great nation to enhance the support control system achievement the synthesis to pick throughout the economic efficiency the important means that the 20th century 60s use manual controls the operating system strai

16、ght; the 70s use the forerunner control system, along with it Britain first proposed that the development battery solution control system, the 80s tends to be mature; the 90s ladder company develops the entire working surface battery solution control system, follows Wister to cut down Liya - the Bei

17、ruite company to develop more advanced P - M3, P - the M4 battery solution control system. Present countries and so on US, Germany, Britain, Australia basically all are the programmable battery solution controls, but our country still used the hand control system.2.3 Hydraulic element aspectHydrauli

18、c elements research and development speed lags by far in the hydraulic support need to develop. Hydraulic supports reliability mainly relies on hydraulic elements reliability, the hydraulic support in the coal mine production applies whether to succeed, the key lies in hydraulic elements technical p

19、erformance whether to meet the requirements. Overseas uses the great current capacity safety valve, the fluid to control the cone-way valve, the cut-off valve at present, initially to support the strength maintaining valve and the column returns to the fluid valve fast. To hydraulic elements structu

20、ral style, the geometry size, the choice of material, the heat treatment method and the surface treatment and so on various aspects have conducted the thorough research and the development. Develops one batch of sealing property to be good, the sensitivity high, enters the row of fluid ability in a

21、big way, the anti-impact load strong each kind of hydraulic element, adapts the hydraulic support operating performance request. But our country lags to this kind of hydraulic element research and development, at present still continued to use on the century 80s products, has not formed the hydrauli

22、c element universalization, the seriation, the standardization.3 Hydraulic support prospects for development forecastIn view of the fact that sciences and technologys high speed development, new technology, new craft, new method, the new material will apply and the computer technology unprecedented

23、expansion unceasingly, hydraulic supports future development has the very attractive prospect3.1 The design ideas renewal, the hydraulic support develops a revolutionMust consider the environment in the hydraulic support design the attribute. Because hydraulic supports working condition is bad, the

24、human, machine the environment reciprocity question appears more important. The green design is the choice of material, the product mix, the technique, the outward appearance modelling and color matching according to certain rule, adopts artistic the method to perform the ingenious fusion, manifests

25、 the man-machine environment systems harmonious unification fully. The unwieldy hydraulic support image safe, reliable, easy to be serviced, consumes energy, the high efficiency, the handsome appearance to substitute lowly. This kind of green design, it is not only feared the environment and the res

26、ources both must meet the economic development needs, and must meet the human survival development needs, is the humanity sustainable development in support design manifestation. For example: The hydraulic support uses the multi-objective fuzzy design in the design process, requests to support the s

27、trength to be big, moves to a speed to be quick, the weight is light, timber wood few and so on, each goal determined that a function, namely many project objective function, then the combination optimizes, determination preferred plan.3.2 Will adopt the pure water hydraulic technique, the hydraulic

28、 support will become the green machineryThe pure water hydraulic technique is the hydraulic pressure domain development front. It not only has good anti-burns the nature, the radiation, moreover the price to be also cheap, does not have the pollution, for long the hydraulic support works under the s

29、urface layer, because the use actuating medium is the emulsion, and has many chemical additives (emulsifier, rust-preventing agent, antiseptic, coupling agent and so on), the micro environmental pollution is very serious to the surface below, therefore, the hydraulic support use pure water hydraulic

30、 technique, to reduces the coal mine the production cost, protects the environment is beneficial, and may improve the mine pit greatly the work and the safety condition. Progresses unceasingly along with the society, the people had a higher request to the dependant survivals environment, hoped that

31、has a security, the environmental protection, the highly civilized green environment. The time request summoned the hydraulic pressure transmission (to origin in 1605 discovered that the Pascals law) this ancient brand-new technology resurfaced, and received the world the attention. At present, the

32、Western country the concentrate efforts to study this technology, and makes the breakthrough progress. For example: The lubrication attrition question, selects reasonably rubs the vice-material, has the engineering plastics, the structure ceramics, the high polymer material, rust prevention anticorr

33、osion coating and so on. The structure ceramics have the resistance to wear, the anti-cavitation performance is good, the good chemical stability, characteristics and so on low friction factor, enjoy the favor. Replaces the partial metallic material in the hydraulic element with the structure ceramics, big improvement its perf