通宇濾業液壓油
液壓系統已經在冶金設備中廣泛應用,特別是在帶鋼連軋機上采用電子計算機自動控制的液壓壓下系統,標志著七十年代的*水平。因生產的迅速發展,就要求提高速度,嚴格控制精度,才能獲得優質高產,這就促使液壓系統采用電液伺服機構,從而大幅度地提高了自動控制程度。為了提高控制系統的反應直線性和靈敏性,減小滑閥的間隙是主要的措施,因而要大幅度地提高元件的制造精度。以莫格(MOOG73型)電液伺服閥為例,其閥芯與閥套的間隙僅0.。。0050時(1 .225微米),直徑公差小于0.25微米,加工精度達到ISAI級精度。我國三機部609研究所生產的
潔凈度標志著七十年代液壓技術的新水平。液壓油的潔凈度直接影響系統的運行狀況。電液伺服系統要求液壓油的潔凈度zui嚴格。潔凈度的級別用得zui廣泛的是NAS和MOOG標準。潔凈度的檢測方法使用Millipore儀zui普遍,分為計數法和重量法兩種。要防止液壓油不被污染是不可能的,但通過人們的努力是可以控制污染的。文中分析了污染顆粒的來源,為了控制污染,提出了從設計上應采取的措施,和設備安裝施工中應采取的措施,以及在運行操作中應采取的一些措施,介紹了武鋼一米七軋機的一些經驗。
◆ 執行ISO4572多次通過試驗，ISO2941濾芯完整性試驗等7項標準。
◆ 過濾比值β:200，精度值可達到1、2、3、5、10、20……um。
◆ 可承受10－42Mpa工作壓力范圍，zui大流量200L/min。
◆ 過濾精度高，通油量大，原始阻力小，納污量大。
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