D343h centrifugal seal butterfly valve - changmao D343h型法兰偏心蝶阀煤气阀- changmao
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Dh746x microresistance butterfly vavle d343h centrifugal seal butterfly vavle Dh746x型微阻蝶式止回阀
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D343h centrifugal seal butterfly valve J41型截止阀
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Through practical test and theoritical analysis , the paper describes the combined sealing types of centrifugal sealing and spiral sealing and designs the appropriate structural of oil seal 通过实验研究和理论分析,论文对轴承箱两端密封结构采用了离心密封和螺旋密封的组合密封方式,设计了相应的结构油封。