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                不銹鋼緊固件應用于風電行業--隨著世界經濟的發展以及石油等不可再生能源的日益枯竭,新興的可再....
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                不銹鋼緊固件應用于風電行業
                發表時間:2015-2-10   閱讀次數:1200
                不銹鋼緊固件應用于風電行業
                隨著世界經濟的發展以及石油等不可再生能源的日益枯竭,新興的可再生綠色能源正越來越廣泛地受到關注。風能作為一種綠色能源,無污染、發電成本低、風力發電場建設工期短等優點,在上世紀末逐步發展與壯大起來。隨著對風力發電項目不斷地探索,風電技術日趨成熟,產品質量可靠,可用率已達95%以上,已是一種安全可靠的能源。我國有豐富的風能資源,又有國外成熟的技術可以借鑒,大力發展此項目無疑是未來的必然趨勢。
                目前,大致有如下三類:

                a.塔筒螺栓:即風力發電機塔座上使用的螺栓,主要使用的事GB/T 1228~1231, DIN 6914~6916以及DAST等大六角頭鋼結構連接副螺栓。
                b.整機螺栓:即風力發電機上使用的螺栓,主要使用的是GB/T 5782,GB/T 5783, GB/T 70.1, GB/T 6170, GB/T 97等六角頭螺栓、內六角螺栓、六角螺母及墊圈。
                c.葉片螺栓:即連接風力發電機葉片的螺栓,主要為一些產品的非標雙頭螺栓及T型圓螺母等。
                風電用高強度緊固件的制造工藝,從技術的角度涉及多學科,從生產的角度涉及各道工序,從管理的角度涉及多部門、多環節,從措施的角度涉及生產成本。
                風電緊固件在技術上有一系列特點:高強度、高精度等級;服務條件嚴酷,它將隨主機一起常年經受酷暑嚴寒和極端溫差的考驗,承受高溫、低溫的侵蝕;功率高,最高達到5MW級;速差大、震動、腐蝕、重載等;除受到軸向預緊拉伸載荷的作用外,還會在工作中受到附加的拉伸交變載荷、橫向剪切交變載荷或由此復合而成的彎曲載荷的作用,有時還受到沖擊載荷;附加的橫向交變載荷會引起螺栓的松動,軸向交變載荷會引起螺栓的疲勞斷裂。而在環境介質的作用下,軸向拉伸載荷會引起螺栓的延遲斷裂,以及高溫條件下引起螺栓的螺變等。


                 


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