5 結論
　　風電機組齒輪箱中齒輪油的清潔度，對齒輪箱的可靠性乃至風電機組的穩定性都有至關重要的影響。本文概述了風電機組齒輪箱中雜質的可能來源、危害及其防護措施，對生產過程、運行過程、外部引入及維護引入等多種雜質來源進行了介紹，對風電機組齒輪箱過濾系統的設計及相關標準也做了相應的討論。
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