【正文】 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, bees produces the coal country synthesis to pick the working surface hydraulic support39。s 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 system39。s 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。s standard control equipment developed. According to inplete 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 support39。s 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 stipulation39。 關(guān)鍵詞： 液壓支架；電液控制系統(tǒng)；過(guò)濾體系；過(guò)濾精度 液壓支架電液控制系統(tǒng)的優(yōu)勢(shì) 液壓支架電液控制系統(tǒng)是由單片機(jī)、傳感器等電子裝置和液壓回路控制部件組成的，可以根據(jù)生產(chǎn)需要控制液壓支架自動(dòng)動(dòng)作的系統(tǒng)。到了 90 年代，液壓支架電液自動(dòng)控制技術(shù)已經(jīng)成熟，工作性能和可靠性已能滿足使用要求，因而發(fā)展十分迅速，成為發(fā)達(dá)產(chǎn)煤國(guó)家綜采工作面液壓支架的標(biāo)準(zhǔn)控制裝備。如果過(guò)濾系統(tǒng)在這個(gè)過(guò)程由于污染嚴(yán)重堵塞失效，將造成真?zhèn)€液壓系統(tǒng)惡性循環(huán)，系統(tǒng)故障率進(jìn)一步增加，甚至造成系統(tǒng)癱瘓。該試驗(yàn)法是將試驗(yàn)系統(tǒng)加入統(tǒng)一濃度ISOMTD 粉末后，在過(guò)濾器上下游分別取樣測(cè)試，并選擇合適的至少 5 種顆粒尺寸范圍，用顆粒計(jì)數(shù)器測(cè)定并計(jì)數(shù)。 ③空氣濾清器、凈化環(huán)境用濾器，通常以重量過(guò)濾效率標(biāo)稱過(guò)濾特性。由于沒(méi)有過(guò)濾或過(guò)濾器位置不合 適，造成重點(diǎn)保護(hù)元件沒(méi)有得到保護(hù)，另一方面即使有了過(guò)濾體系，也必須做好預(yù)防，盡可能避免污染物進(jìn)入系統(tǒng)，做到主動(dòng)預(yù)防和被動(dòng)過(guò)濾防護(hù)相結(jié)合的清潔度保證體系，只有這樣才能保證整個(gè)電液控制系統(tǒng)的可靠穩(wěn)定運(yùn)行。但要真正使用好電液控制系統(tǒng)、發(fā)揮電液控制系統(tǒng)的優(yōu)越性，僅通過(guò)提高電液控制系統(tǒng)本身質(zhì)量還是遠(yuǎn)遠(yuǎn)不夠的。以上 3 種濾器的過(guò)濾精度雖然定義不同，但都基于一種測(cè)試方法，即顆粒傳輸法，所以現(xiàn)代過(guò)濾計(jì)數(shù)對(duì)過(guò)濾器特性的評(píng)定都廢除了以往的孔徑測(cè)定法和濾材目數(shù) 法，但在煤炭行業(yè)很多企業(yè)和用戶依然沿用濾材數(shù)目法。β值取 5， 20， 75， 200， 2021 定為自己企業(yè)評(píng)定過(guò)濾器水平（這一比值就是過(guò)濾效率）。 ②由于電液控制換向閥結(jié)構(gòu)及性能需要介質(zhì)清潔度高，系統(tǒng)均配套 25181。目前中國(guó)有 131 個(gè)綜采工作面使用電液控制系統(tǒng)， PM31 電液控制系統(tǒng)是目前國(guó)產(chǎn)液壓支架的主流電液控制系統(tǒng)，占國(guó)產(chǎn)液壓支架電液控制系統(tǒng)市場(chǎng) 80%以上的份額。 ②可以實(shí)現(xiàn)跟機(jī)自動(dòng)化作業(yè)、降低勞動(dòng)強(qiáng)度、改善勞動(dòng)條件、減少工作面的操作人員。s 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