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                                                                                                                                                                鐵譜儀種類有哪些?工作原理是什么?
                                                                                                                                                                發布時間:2016-7-25

                                                                                                                                                                   國內外已開發出的鐵譜儀種類很多,他們也從不同角度提出了不同的分類方法。由于磁鐵裝置是鐵譜儀的核心部件,若按磁鐵的工作原理來分,可分為永磁式鐵譜儀和電磁式鐵譜儀。根據機器狀態監測方式來分,又可分為離線鐵譜儀和在線鐵譜儀。若按實現鐵譜定量與定性分析功能需要來分,又可分為分析式鐵譜儀、直讀式鐵譜儀、雙聯式鐵譜儀等,上述三種鐵譜儀都屬于離線鐵譜儀。此外,若根據鐵譜片的制作原理不同分類,又可分為旋轉式鐵譜儀和固定式鐵譜儀。


                                                                                                                                                                  鐵譜儀是將從潤滑系統中取得的分析油樣經稀釋處理后取樣到玻璃管中,經微量泵將分析油樣輸送到安放在磁場裝置上方的玻璃基片的上端,玻璃基片的安裝與水平面成一定傾斜角,以便在沿油流方向形成一逐步增強的高強度磁場,同時又便于油液沿傾斜的基片向下流動,從玻璃基片下端經導流管排入廢油杯中。分析油樣中的可磁化金屬磨粒在流經高梯度強磁場時,在高梯度磁力、液體黏性阻力和重力聯合作用下,按磨粒尺寸大小有序地沉積在玻璃基片上,并沿垂直于油樣流動方向形成鏈狀排列。在分析油樣從基片上流過之后,經用四氯乙烯溶液洗滌基片,清除殘余油液,使磨粒固定在基片上便制成了可供觀察和檢測的鐵譜片。

                                                                                                                                                                  鐵譜儀的原理是利用高梯度強磁場將機器潤滑油中鉄磁性磨粒分離出來,并按其粒度大小順序地沉積在玻璃片上。然后通過雙色顯微鏡觀察磨粒的形態、大小,并進行成份分析,亦可用讀數器進行磨粒復蓋面積百分比的測定。

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