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涂硅烷改性聚氨酯密封膠前的準備工作
- 發布時間 : 2025-1-25 20:27:09
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
涂硅烷改性聚氨酯密封膠前的準備工作
(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
- 發布時間 : 2025-1-25 20:27:09
- Views:
測量汽室體上作部分的橢圓度,沿同一圓周測驗3個尺寸,以確定涂硅烷改性聚氨酯密封膠的方式。若汽室體局部變形在0.3mm以下,采用壓套后端面密封方式,若變形量在V: 3mm-0.6mm,則采用體孔表面涂硅烷改性聚氨酯密封膠后壓套。
汽室體在涂硅烷改性聚氨酯密封膠前必須徹底清掃,在涂硅烷改性聚氨酯密封膠部位要進行脫脂處理。
涂硅烷改性聚氨酯密封膠
(1)汽室體工作面的溝痕不論深淺均用密封膠填平。變形的體孔涂硅烷改性聚氨酯密封膠后,用樣板刮圓,待膠液半固化時進行壓套。
(2)壓套后〔包括現車竄汽)可用密封膠進行封口。確.盆膠的理化性能
(1)耐熱性:600℃時枯結性能不變;
(2)熔點。ago℃,
(3)線膨脹系數,0.7x L4-0j1Cr
(4)剪切強度:6-15MPa
(5)氣密性:0.133 x 10-g1.33 x10-"P$
(6)耐低溫性能:一186}a
(7)耐腐蝕性能。耐水,耐油,但不耐強酸和堿。
(8)耐久性:膠層室溫放置五年,粘接強度無變化.
試驗和現車試驗
為了證實密封膠對高溫、高壓環境的適在使用硅烷改性聚氨酯密封膠以前的幾年里,平均每年因汽室壁竄汽要更換汽室套5臺以上,直接經濟損失達fi00Q元。其低因竄汽造成的費煤珍水.以及機車停修造成的間接經濟損失更無法估算。自使用硅烷改性聚氨酯密封膠解決汽室竄汽以來,再沒發生過竄汽而更換汽室套的工作。采用新的密封工藝還可降低密封材料的成本,僅此一項,每年可節約費用18577元。以上僅僅是我廠的統計的數字,俏若現有的汽機車修理廠和為數眾多的機務段都能采用此工藝解決汽室壁竄汽間愚所能收到的經濟效益和社會效益將更為可觀。10存在問膠液的存在朋比較短,只能現用現配,因此,如何延一民膠液的存放期,仍是個有待解決的難題。http://www.www.mobmib.com/
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