五一小長假FESTO氣缸*德國費斯托氣缸 氣缸常見問題及原因分析:
1.汽缸是鑄造而成的,汽缸出廠后都要經(jīng)過時效處理,使汽缸在住鑄造過程中所產(chǎn)生的內(nèi)應(yīng)力*消除。如果時效時間短,那么加工好的汽缸在以后的運行中還會變形。
2.汽缸在運行時受力的情況很復(fù)雜,除了受汽缸內(nèi)外氣體的壓力差和裝在其中的各零部件的重量等靜載荷外,還要承受蒸汽流出靜葉時對靜止部分的反作用力,以及各種連接管道冷熱狀態(tài)下對汽缸的作用力,在這些力的相互作用下,汽缸易發(fā)生塑性變形造成泄漏。
3.汽缸的負荷增減過快,特別是快速的啟動、停機和工況變化時溫度變化大、暖缸的方式不正確、停機檢修時打開保溫層過早等,在汽缸中和發(fā)蘭上產(chǎn)生很大的熱應(yīng)力和熱變形。
4.汽缸在機械加工的過程中或經(jīng)過補焊后產(chǎn)生了應(yīng)力,但沒有對汽缸進行回火處理加以消除,致使汽缸存在較大的殘余應(yīng)力,在運行中產(chǎn)生*的變形。
5.在安裝或檢修的過程中,由于檢修工藝和檢修技術(shù)的原因,使內(nèi)缸、汽缸隔板、隔板套及汽封套的膨脹間隙不合適,或是掛耳壓板的膨脹間隙不合適,運行后產(chǎn)生巨大的膨脹力使汽缸變形。
6.使用的汽缸密封劑質(zhì)量不好、雜質(zhì)過多或是型號不對;汽缸密封劑內(nèi)若有堅硬的雜質(zhì)顆粒就會使密封面難以緊密的結(jié)合。
7.汽缸螺栓的緊力不足或是螺栓的材質(zhì)不合格。汽缸結(jié)合面的嚴(yán)密性主要靠螺栓的緊力來實現(xiàn)的。機組的起?;蚴窃鰷p負荷時產(chǎn)生的熱應(yīng)力和高溫會造成螺栓的應(yīng)力松弛. 163447 DNC-80-25-PPV
163433 DNC-80-25-PPV-A
163448 DNC-80-40-PPV
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163449 DNC-80-50-PPV
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163450 DNC-80-80-PPV
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163453 DNC-80-160-PPV
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163454 DNC-80-200-PPV
163440 DNC-80-200-PPV-A
163455 DNC-80-250-PPV
163441 DNC-80-250-PPV-A
五一小長假FESTO氣缸*德國費斯托氣缸
163456 DNC-80-320-PPV
163442 DNC-80-320-PPV-A
163457 DNC-80-400-PPV
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163499 DNC-125-50-PPV-A
163514 DNC-125-80-PPV
163500 DNC-125-80-PPV-A
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1922622 DNC-32-300-PPV-A
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1922645 DNC-80-150-PPV-A
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567882 DNC-32-50-PPV-A-C180
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567889 DNC-32-320-PPV-A-C180
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567898 DNC-40-320-PPV-A-C180
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567900 DNC-50-50-PPV-A-C180
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567903 DNC-50-125-PPV-A-C180
567904 DNC-50-160-PPV-A-C180
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567909 DNC-63-50-PPV-A-C180
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