液壓支架外文翻譯--液壓支架電液控制系統(tǒng)使用中的問(wèn)題及對(duì)策-液壓系統(tǒng)-預(yù)覽頁(yè)
【正文】 n system stops up seriously, the support slow in one39。s promoted application, also has met some questions, is restricting the battery solution control system39。s straight, realizes the working surface straight passage. ⑤ Easy to realize the belt pressure to move to the frame, and prevents the roof failure accident regarding the protection roof39。 Filtration system。s superiority fully, In many year research39。s performance, demonstrates the support battery solution control system39。 Battery solution control system。s life, simultaneously may protect working surface conveyer39。s mainstream battery solution control system, occupies the domestic product hydraulic support battery solution control system market 80% above shares. at present faces question, reason and key to the situation Along with battery solution control system39。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 experiment powder (ISOMTD), the experimental standard is ISO16889 Adopts Cutandtry method Many times. Every uses ISO16889 and the experimental powder is ISOMTD, when standard filter39。s 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 onsite maintenance and so on several aspects begins together, can demonstrate the battery solution control system39。 ①可以將液壓支架的降架、拉架、升架、推移前部輸送機(jī) 、拉后部輸送機(jī)、收護(hù)幫板、伸護(hù)幫板、噴霧灑水及放頂煤等動(dòng)作由原來(lái)的人工手動(dòng)操作改為電液自動(dòng)控制、程序化操作，能夠與高效采煤機(jī)相匹配加快工作面推進(jìn)速度，顯著提高采煤工作面的生產(chǎn)效率。 ⑤易于實(shí)現(xiàn)帶壓移架，對(duì)于保護(hù)頂板的穩(wěn)定性和防止冒頂事故非常有利。據(jù)不完全統(tǒng)計(jì)，目前已有 300 多個(gè)綜采工作面使用電液控制液壓支 架，主要集中在美國(guó)、澳大利亞、德國(guó)、中國(guó)、斯洛文尼亞、南非、俄羅斯、波蘭、墨西哥、加拿大等國(guó)家。以清潔度為例，國(guó)內(nèi)支架在生產(chǎn)知道電液控支架時(shí)還是沿用原有手動(dòng)控制系統(tǒng)支架生產(chǎn)清潔度控制標(biāo)準(zhǔn)，這就造成支架使用問(wèn)題，但由于電液控制換向閥對(duì)清潔度要求高，整個(gè)支架電液控制系統(tǒng)使用初期電磁先導(dǎo)閥和主閥由于污染損壞嚴(yán)重，故 障率增加。目前，迫切需要根據(jù)電液控制系統(tǒng)要求，制定電液控制系統(tǒng)相關(guān)元部件加工制造標(biāo)準(zhǔn)，從而確保整個(gè)電液控制系統(tǒng)的可靠穩(wěn)定運(yùn)行。 ③過(guò)濾系統(tǒng)標(biāo)準(zhǔn)不統(tǒng)一，部分國(guó)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。上游某尺寸顆粒數(shù)比下游同尺寸顆粒數(shù)，比值為β。 ②汽車、工程 車、一般設(shè)備潤(rùn)滑、燃油等過(guò)濾器大多用 SAE806b 標(biāo)準(zhǔn)。習(xí)慣稱幾個(gè)“ 9”使用試驗(yàn)粉末為 ACFTD。雖然濾材選擇合適但由于加工工藝不合格造成過(guò)濾器成品精度明顯降低，不能滿足系統(tǒng)要求。 結(jié)論 液壓支架電液控制系統(tǒng)是實(shí)現(xiàn)煤礦安全高效開采的關(guān)鍵技術(shù)，是實(shí)現(xiàn)高產(chǎn)高效工作面的必要條
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