【正文】 雖然濾材選擇合適但由于加工工藝不合格造成過濾器成品精度明顯降低，不能滿足系統(tǒng)要求。 ③過濾系統(tǒng)標(biāo)準(zhǔn)不統(tǒng)一，部分國產(chǎn)化濾芯制造質(zhì)量不合格，以次充好，造成電液控制系統(tǒng)不穩(wěn)定，故障率高等。 ⑤易于實現(xiàn)帶壓移架，對于保護頂板的穩(wěn)定性和防止冒頂事故非常有利。s 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 electromagism first pilot valve and main valve, because the pollution damage is serious, the failure rate increases. Generally requires period of time (12 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 system39。s performance, demonstrates the support battery solution control system39。s promoted application, also has met some questions, is restricting the battery solution control system39。 ②可以實現(xiàn)跟機自動化作業(yè)、降低勞動強度、改善勞動條件、減少工作面的操作人員。 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。以上 3 種濾器的過濾精度雖然定義不同，但都基于一種測試方法，即顆粒傳輸法，所以現(xiàn)代過濾計數(shù)對過濾器特性的評定都廢除了以往的孔徑測定法和濾材目數(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。由于沒有過濾或過濾器位置不合 適，造成重點保護元件沒有得到保護，另一方面即使有了過濾體系，也必須做好預(yù)防，盡可能避免污染物進入系統(tǒng)，做到主動預(yù)防和被動過濾防護相結(jié)合的清潔度保證體系，只有這樣才能保證整個電液控制系統(tǒng)的可靠穩(wěn)定運行。該試驗法是將試驗系統(tǒng)加入統(tǒng)一濃度ISOMTD 粉末后，在過濾器上下游分別取樣測試，并選擇合適的至少 5 種顆粒尺寸范圍，用顆粒計數(shù)器測定并計數(shù)。到了 90 年代，液壓支架電液自動控制技術(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)達產(chǎn)煤國家綜采工作面液壓支架的標(biāo)準(zhǔn)控制裝備。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。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 stability to be advantageous. ⑥ May control the support initially to support the strength well, obviously improves the supports and protections effect and the working surface management level. domestic and foreign application situation Overseas 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, bees prod