涂硅烷改性聚氨酯密封胶前的准备工作

发布时间 : 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胶前的准备工作

(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.

发布时间 : 2025-1-25 20:27:09
Views:

测量汽室体上作部分的椭圆度，沿同一圆周测验3个尺寸，以确定涂硅烷改性聚氨酯密封胶的方式。若汽室体局部变形在0.3mm以下，采用压套后端面密封方式，若变形量在V: 3mm-0.6mm,则采用体孔表面涂硅烷改性聚氨酯密封胶后压套。

汽室体在涂硅烷改性聚氨酯密封胶前必须彻底清扫，在涂硅烷改性聚氨酯密封胶部位要进行脱脂处理。

涂硅烷改性聚氨酯密封胶

(1)汽室体工作面的沟痕不论深浅均用密封胶填平。变形的体孔涂硅烷改性聚氨酯密封胶后，用样板刮圆，待胶液半固化时进行压套。

(2)压套后〔包括现车窜汽)可用密封胶进行封口。确.盆胶的理化性能

(1)耐热性:600℃时枯结性能不变;

(2)熔点。ago℃，

(3)线膨胀系数，0.7x L4-0j1Cr

(4)剪切强度:6-15MPa

(5)气密性:0.133 x 10-g1.33 x10-"P$

(6)耐低温性能:一186}a

(7)耐腐蚀性能。耐水，耐油，但不耐强酸和碱。

(8)耐久性:胶层室温放置五年，粘接强度无变化.

试验和现车试验

为了证实密封胶对高温、高压环境的适在使用硅烷改性聚氨酯密封胶以前的几年里，平均每年因汽室壁窜汽要更换汽室套5台以上，直接经济损失达fi00Q元。其低因窜汽造成的费煤珍水.以及机车停修造成的间接经济损失更无法估算。自使用硅烷改性聚氨酯密封胶解决汽室窜汽以来，再没发生过窜汽而更换汽室套的工作。采用新的密封工艺还可降低密封材料的成本，仅此一项，每年可节约费用18577元。以上仅仅是我厂的统计的数字，俏若现有的汽机车修理厂和为数众多的机务段都能采用此工艺解决汽室壁窜汽间愚所能收到的经济效益和社会效益将更为可观。10存在问胶液的存在朋比较短，只能现用现配，因此，如何延一民胶液的存放期，仍是个有待解决的难题。http://www.sdyuantai.com/

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