液压支架外文翻译液压支架电液控制系统使用中的问题及对策.docx

1、液压支架外文翻译液压支架电液控制系统使用中的问题及对策本科生毕业设计外文翻译学生姓名：xxx学 号：xxx专 业：机械设计制造及其自动化班 级：机05-3班指导教师：xxxIn hydraulic support battery solution control system use question and countermeasureZhang Mingli（张命林）(Zhengzhou coal mine mechanical group Limited liability company Henan Zhengzhou 450013)Luo Yueyong（罗跃勇）(Beijing w

2、orld Ma Ke battery solution control system Limited company Beijing 100013)Abstract: To further display the support battery solution control systems performance, demonstrates the support battery solution control systems superiority fully, In many year researchs foundations, elaborated systematically

3、the support battery solution control system several aspects which displays in the domestic and foreign application condition and the present influence and the restriction domestic product support battery solution control system use and the performance. Proposed the formulation battery solution contr

4、ol system Guanyuan part manufacturing unified standards, the unification filtering element profession standard and the establishment battery solution control system working surface prevents the cleanliness control systems importance which on own initiative and the passive filtration protection unifi

5、es, Establishes the perfect filtration protection system, further displays the domestically produced support battery solution control system performance.Key word: Hydraulic support; Battery solution control system; Filtration system; Filter fineness1、hydraulic support battery solution control system

6、s superiorityThe hydraulic support battery solution control system is by electronic installations and the hydraulic circuit control portion and so on monolithic integrated circuit, sensor is composed, may need to control the hydraulic support automatic performance according to the production the sys

7、tem.Behind may fall the hydraulic support, to try to break up a fight, to rise the frame, the passage front part conveyer, to pull the conveyer, to receive protects helps the board, to extend protects helps the board, the atomization water spray and puts goes against movements and so on coal to chan

8、ge by the original man-power manual operation the battery solution automatic control, the sequencing to operate, Can match with the highly effective coal mining machine speeds up the working surface advancement speed, obviously enhances the mining coal working surface the production efficiency.May r

9、ealize with machine the automated work, reduces the operators who the labor intensity, the improvement work condition, reduces the working surface.May solve under the special geological condition and the difficult working condition technique of production question, for example, in the thin coal bed

10、working surface personnel are unable under the condition which operates in the working surface, may realize the non-hominization working surface (to with coal plow system coordination use).May realize the multi-frames simultaneously to push the conveyer and may the quota advancement, guaranteed that

11、 conveyer gentle curving, middle avoids the trough attachment point having the oversized stress, lengthens conveyers life, simultaneously may protect working surface conveyers straight, realizes the working surface straight passage.Easy to realize the belt pressure to move to the frame, and prevents

12、 the roof failure accident regarding the protection roofs stability to be advantageous.May control the support initially to support the strength well, obviously improves the supports and protections effect and the working surface management level.2、 domestic and foreign application situationOverseas

13、 started in the 1970s to develop the development hydraulic support with the electrically controlled system, in the 80s entered the substantive application stage. To the 90s, the hydraulic support battery solution automatic control technology had been already mature, the operating performance and the

14、 reliability have been able to satisfy the operation requirements, thus develops very rapidly, becomes produces the coal country synthesis to pick the working surface hydraulic supports standard control equipment developed. According to incomplete statistics, had more than 300 syntheses to pick the

15、working surface use battery solution control hydraulic support at present, mainly concentrates in countries and so on US, Australia, Germany, China, Slovenia, South Africa, Russia, Poland, Mexico, Canada. At present China has 131 syntheses to pick the working surface use battery solution control sys

16、tem, the PM31 battery solution control system is the present domestic product hydraulic supports mainstream battery solution control system, occupies the domestic product hydraulic support battery solution control system market 80% above shares.3、 at present faces question, reason and key to the sit

17、uationAlong with battery solution control systems promoted application, also has met some questions, is restricting the battery solution control systems use and the performance full display, concrete manifestation in the following several aspects:The system hydraulic element failure rate compares th

18、e complete set introduction system to compare high somewhat, specially in working surface trial production and production initial period. In recent years, along with the home production processing levels enhancement, hydraulic elements and so on support as well as battery solution cross valve has re

19、alized the manufacture domestically, carries on the systems assembly together through several factories, this had a new problem, each factory acts according to the respective product performance request determination manufacture standard, but has not considered the entire battery solution control sy

20、stems performance requirement Take the cleanliness as the example, the domestic support in the production knew the battery solution controls when the support continues to use the original hand control system support production cleanliness control standard, this creates the support use problem, but b

21、ecause the battery solution control cross valve requests high to the cleanliness, entire support battery solution control system use initial period electromagnetism first pilot valve and main valve, because the pollution damage is serious, the failure rate increases. Generally requires period of tim

22、e (1-2 months) after the use, the system can restore normally. This is take has a good filtration system as a premise. If filtration system in this process, because pollutes the serious jamming to expire, will create the hydraulic system vicious circle, the system failure rate further increases real

23、ly, even creates the system paralysis. At present, urgent needs according to the battery solution control system request, the formulation battery solution control system Guanyuan part processing manufacture standard, thus guarantees the entire battery solution control systems reliable steady operati

24、on.Because the battery solution control cross valve structure and the performance need the medium cleanliness to be high, the system necessary 25m precision filter, set the new request to the medium and the emulsion allocated proportion. Along with these years battery solution control system in the

25、domestic promoted application, appeared generally, because the emulsion choice unqualified, the density allocated proportion causes in the medium to stick the thick shape material separation unreasonable, so that the working surface filtration system stops up seriously, the support slow in ones move

26、ments or cannot act, filter element big area jamming expiration.Filters the system standard not to be unified, the part manufacture domestically filter element manufacture quality is unqualified, takes substandard products as fine products, causes the battery solution control system not to be unstab

27、le, failure rate higher.At present domestic is not unified to filter finenesss definition various professions standard, even some filter element Manufacturer and the user do not know the filter fineness the definition method, but internationally has several different definition methods about the fil

28、ter fineness, Has three kinds approximately: 1) the hydraulic pressure filtration technology use stipulations experiment powder (ISOMTD), the experimental standard is ISO16889 Adopts Cut-and-try method Many times. Every uses ISO16889 and the experimental powder is ISOMTD, when standard filters preci

29、sion indicates with (C). After this testing method is joins the pilot system the unification density ISOMTD powder, in the filter upstream and downstream separately takes a sample the test, and chooses the appropriate at least 5 kind of particle size scope, determines with the pellet counter and cou

30、nts. The upstream some size pellet number compares the downstream same size pellet number, ratio is. the value takes 5,20,75,200,2000 decides as enterprise evaluation filter level (this ratio is filter efficiency). If 5m pellet upstream and downstream ratio is 20, then may understand that for 5m the

31、 filter efficiency is 95%. Usually the labelling filter precision wrote =20, x for determined =20 that particle size.Filter and so on automobile, machine shop truck, common equipment lubrication, fuel oil mostly use the SAE806b standard. It uses the biggest pellet passage, the use glass micro bead o

32、r the AC experiment powder, joins the powder after the test platform from the filter downstream sample, the fluid type (0.8 or 0.5m) filters and collects the pellet with the millipore filter, then examined under the microscope. If discovers the biggest pellet for 20m, then filter fineness for 20m.The air cleaner, the purification environment use the filter, usually by weight filter efficiency nominal filtration characteristic. The custom said that several “9” the field test powder is ACFTD. Although above 3 kind of filters filter fineness defines differently, but based on one test met