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.doc

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 world 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 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 control 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 unifies, 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 systems 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 system.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 change 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 realize 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 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 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 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 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 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 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 system, 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 situationalong 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 the 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 realized 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 systems 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 because 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 time (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 really, 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 operation.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 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 movements 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 unstable, 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 filter 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 precision 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 counts. 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 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 or 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 method, namely pellet transmission law, therefore the modern filtration counting abolished the former aperture measuring method to the filter characteristic evaluation and filters the material item of number law, but still continues to use in coal profession many enterprises and the user filters the material number law. this causes in the market the same 25m filter operational accuracy difference to be very big. on the other hand, regarding the high accuracy filter (25m), filters the material the choice and the processing is very strict, some enterprises cheat on labor and materials the choice to filter the material or the processing craft inferior do not go through a strategic pass, create the filter element processing flaw. although filters the material choice to be appropriate because, but the processing craft is unqualified causes the filter end product precision to reduce obviously, cannot satisfy the system request. therefore should formulate the battery solution control system to produce, the processing and examination profession standard especially important as soon as possible with the filter.entire filtration system not perfect or inadequate system, creates the system existence crack or the system function cannot display fully, serious influence battery solution control system performance display. because does not have the filtration or the filter position is inappropriate, creates key protects the part not to obtain the protection, even if on the other hand had the filtration system, must complete the prevention, avoids the pollutant entering the system as far as possible, achieves cleanliness guarantee system which the driving prevention and the passive filtration protection unify, only then can guarantee the entire battery solution control systems reliable steady operation like this4、conclusionthe hydraulic support battery solution control system realizes the coal mine safety highly effective mining key technologies, realizes the high production highly effective working surface essential condition. but must use the good battery solution control system, the display battery solution control systems superiority truly, only through improves the battery solution control system itself quality to be not enough. must from the support and the hydraulic services production, the medium cleanliness control and on-site maintenance and so on several aspects begins together, can demonstrate the battery solution control systems superiority fully.reference张良液压支架电液控制系统的应用现状及发展趋势煤炭科学技术2003(2)戴天翼孔径尺寸不是过滤精度液压气动与密封2003(6)液压支架电液控制系统使用中的问题及对策张命林（郑州煤矿机械集团有限责任公司 河南郑州 450013）罗跃勇（北京天地玛珂电液控制系统有限公司 北京 100013）摘要：为了进一步发挥支架电液控制系统的性能，充分展示支架电液控制系统的优势，在多年研究的基础上，系统地阐述了支架电液控制系统在国内外的应用状况及目前影响和制约国产支架电液控制系统使用和性能发挥的几个方面。提出了制定电液控制系统相关元部件生产制造统一标准、统一过滤元件行业标准及建立电液控制系统工作面主动预防与被动过滤防护相结合的清洁度控制体系的重要性，建立健全过滤防护体系，进一步发挥国产支架电液控制系统性能。关键词：液压支架；电液控制系统；过滤体系；过滤精度1、液压支架电液控制系统的优势液压支架电液控制系统是由单片机、传感器等电子装置和液压回路控制部件组成的，可以根据生产需要控制液压支架自动动作的系统。可以将液压支架的降架、拉架、升架、推移前部输送机、拉后部输送机、收护帮板、伸护帮板、喷雾洒水及放顶煤等动作由原来的人工手动操作改为电液自动控制、程序化操作，能够与高效采煤机相匹配加快工作面推进速度，显著提高采煤工作面的生产效率。可以实现跟机自动化作业、降低劳动强度、改善劳动条件、减少工作面的操作人员。可以解决特殊地质条件和困难生产条件下的生产工艺问题，例如在薄煤层工作面人员无法在工作面内操作的条件下，可以实现无人化工作面（需与刨煤机系统配合使用）。可实现多架同时推输送机并可定量推进，保证输送机平缓弯曲，避免中部槽连接处产生过大的应力，延长输送机的寿命，同时可以保护工作面输送机的平直性，实现工作面的平直推移。易于实现带压移架，对于保护顶板的稳定性和防止冒顶事故非常有利。可以较好地控制支架初撑力，显著改善支护效果和工作面管理水平。2、国内外的应用情况国外在20世纪70年代开始开发研制液压支架用电控系统，80年代进入实质性应用阶段。到了90年代，液压支架电液自动控制技术已经成熟，工作性能和可靠性已能满足使用要求，因而发展十分迅速，成为发达产煤国家综采工作面液压支架的标准控制装备。据不完全统计，目前已有300多个综采工作面使用电液控制液压支架，主要集中在美国、澳大利亚、德国、中国、斯洛文尼亚、南非、俄罗斯、波兰、墨西哥、加拿大等国家。目前中国有131个综采工作面使用电液控制系统，pm31电液控制系统是目前国产液压支架的主流电液控制系统，占国产液压支架电液控制系统市场80%以上的份额。3、目前面临的问题、原因及解决途径随着电液控制系统的推广应用，也遇到了一些问题，制约着电液控制系统的使用和性能的充分发挥，具体表现在以下几个方面：系统液压元件故障率较全套引进系统相比偏高一些，特别是在工作面试生产和生产初期。近几年，随着国内生产加工水平的提高，支架以及电液换向阀等液压元件实现了国产化，通过几个厂家来共同进行系统配套，这就出现了一个新的问题，各个厂家根据各自产品性能要求 确定制造标准，而没有考虑到整个电液控制系统的性能要求。以清洁度为例，国内支架在生产知道电液控支架时还是沿用原有手动控制系统支架生产清洁度控制标准，这就造成支架使用问题，但由于电液控制换向阀对清洁度要求高，整个支架电液控制系统使用初期电磁先导阀和主阀由于污染损坏严重，故障率增加。一般都需要一段