外文翻译---液压支架的发展与前瞻

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1、The hydraulic pressure support development with first gazes Key word hydraulic pressure support； Control； Intellectualization 1 hydraulic pressure supports development The hydraulic pressure support is take the high-pressured liquid as a power, by certain hydraulic pressure part (cylinder, pipe acce

2、ssory) one kind of strut and the control roof mining coal working surface equipment which becomes with some steel work combinations. Has the intensity high, the travelling speed quick, support the performance good, safe is reliable and so on the characteristic. Since the 20th century 50s, the hydrau

3、lic pressure support has gradually become the mining coal working surface core equipment, in the world mainly produced the coal country to invest the massive manpower physical resource and the financial resource carries on the research development to it. At present, support tends to take the hydraul

4、ic pressure support as the main body maturely, in the world has produced makes several hundred kind of frames and the up to ten thousand kind of models hydraulic pressure support, meets each kind of coal bed mining support need. On the century 60s, our country once has also developed 10 kind of hydr

5、aulic pressure supports, because all sorts of reasons have not obtained the promoted application, the hydraulic pressure support is in the development, the experimental stage； The 70s successively from England, Germany, Poland, former Soviet Union and so on mainly produce the coal country to introdu

6、ce several 10 sets of hydraulic pressure supports. After the unceasing exploration, the use, the digestion and the summary, make each kind of type the support, it is the beginning which the domestically produced hydraulic pressure support develops； The 80s hydraulic pressure support research and dev

7、elopment is in the innovation to enhance the stage, develops 30 kind of new frames one after another, makes the ZZ series, the XY series, the ZD series and so on the different specification, and widely uses in the state-owned large and middle scale coal mines, obtains the good economic efficiency； 9

8、0s special hydraulic pressure support development obtains the rapid development, the mechanized shop net support, the water granulated substance fills the support, the reason support, the force support, puts goes against the coal support and so on to be published one after another； This century alon

9、g with the computer technology, the automated technology popularization and the application, the hydraulic pressure support control obtains unprecedentedness to progress, gradually to the procedure control, the numerical control, the remote control and the automated control makes great strides forwa

10、rd. 2 domestic and foreign hydraulic pressure supports difference The domestically produced support in the manufacture technology, the material quality performance, the processing craft, the control system and in the sealing property compares with the overseas advanced countries has the very big dis

11、parity. 2.1 processings manufactures aspect According to the related synthesis picks the engineers and technicians to reflect that, the domestically produced hydraulic pressure support craft technology, the service life, the operational performance, use the material quality so far not yet to achieve

12、 in 1979 introduced 100 sets of supports the technical levels. If structural material: Germany uses the ST52 material it yield strength is 500 MPa, but our country uses 16 Mn material yield strength is only 350 MPa； Valve class: Overseas always uses the copper alloy valve shell and the high strength

13、 stainless steel valve core, our country is the 45# steel adds surface heat processing； In processing craft: The overseas cylinder endophragm is duplicate plates, the domestic product for does not plate, causes the column premature to appear the spot in the use process, scratches and so on the seal

14、leaks the fluid phenomenon, affects support the effect. The domestically produced hydraulic pressure support and the overseas production hydraulic pressure support compares the average to reduce 2 3 a service life. 2.2 control systems aspect The domestically produced hydraulic pressure support contr

15、ol system research and development is at backwardness condition, seriously restricted the support to move supposes the speed the enhancement and the synthesis picks the economic efficiency the display. In the world several mainly produce the coal great nation throughout to enhance the support contro

16、l system achievement the synthesis to pick the economic efficiency the important method, the 20th century 60s use manually straight control the operating system； The 70s use the forerunner control system, along with it England first proposed the development electrohydraulic control system, the eight

17、ys tends to maturely； The 90s ladders company develops the entire working surface electrohydraulic control system, follows closely after that Wister to cut down the advantage Asia - shell Switzerland special company to develop more advanced P - M3, P - the M4 electrohydraulic control system. Present

18、ly country and so on US, Germany, England, Australia basically all is the programmable electrohydraulic control, but our country still used the hand control system. 2.3 hydraulic pressure parts aspect The hydraulic pressure part research and development speed lags by far to the hydraulic pressure su

19、pport need to develop. The hydraulic pressure support reliability mainly relies on the hydraulic pressure part reliability, the hydraulic pressure support in the coal mine production applies whether succeeds, the key lies in the hydraulic pressure part the technical performance whether does meet the

20、 requirements. Overseas at present uses the great current capacity safety valve, the fluid much controls the cone-way valve, the cut-off valve, initially supports the strength maintenance valve and the column quickly returns at once the fluid valve. To the hydraulic pressure part structural style, t

21、he 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 well, the sensitivity high, enters the row of fluid ability to be big, the anti- im

22、pact load strong each kind of hydraulic pressure part, adapts the hydraulic pressure support operating performance request. But our country kind of hydraulic pressure part research and development lags regarding this, at present still continued to use the century for 80s the product, has not formed

23、the hydraulic pressure part universalization, the seriation, the standardization 3 hydraulic pressure supports prospects for development forecast In view of the fact that the science and technology high speed development, new technical, the new craft, the new method, the new material unceasing application and the computer technology unprecedented expansion, the hydraulic pressure support