MS密封胶胶筒压缩变形特征分析

发布时间 : 2025-8-5 10:51:16
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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.

MS密封胶胶筒压缩变形特征分析

(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 : 2025-8-5 10:51:16
Views:

根据室内试验数据绘制了压缩式MS密封胶胶筒轴向载荷与压缩量的关系曲线，如图1所示。可以看出，MS密封胶胶筒的变形过程可以分为弹性变形、约束变形和稳定变形3个阶段。

弹性变形阶段

MS密封胶胶筒受轴向载荷被压缩后，径向逐渐扩张，在此阶段，MS密封胶胶筒与套管之间没有接触，MS密封胶胶筒完全没有密封能力，随着轴向载荷的增加，进一步加大MS密封胶胶筒的轴向压缩和径向扩张。轴向载荷与压缩量呈线性关系(如图1 AB段所示)。

约束变形阶段

从MS密封胶胶筒外径和套管内壁相接触起，至MS密封胶胶筒工作面完全和套管内壁相接触的变形过程，即为约束变形阶段。在此阶段，由于变形受到限制，受力状况发生了改变，既有轴向力同时又有套管内壁对MS密封胶胶筒的作用力。轴向载荷与压缩量失去了线性关系(如图1BC段所示)。

稳定变形阶段

MS密封胶胶筒在轴向载荷作用下，压缩量不再继续发生变化的阶段称为稳定变形阶段。在此阶段，MS密封胶胶筒工作面完全和套管内壁相接触，轴向压缩量达到了最大值。

在试验过程中发现，由于MS密封胶胶筒两端的承压座与套管内壁之间有5 mm间隙，随着轴向载荷的逐步增加，MS密封胶胶筒将产生肩部突出变形现象，导致轴向压缩量进一步发生微量变化(如图1 CD段所示)。

MS密封胶胶筒突出变形与轴向载荷的关系

轴向载荷主要包括MS密封胶胶筒的坐封力和工作压差产生的对MS密封胶胶筒的轴向压缩力。在本次试验研究过程中，轴向载荷均由拉力试验机提供。

坐封力与突出变形的关系

选用硬度为邵尔74 A，倒角为300的3“MS密封胶胶筒，利用拉力试验机施加坐封力，对加载端的肩部突出变形进行试验分析，得出的坐封力与MS密封胶胶筒突出变形的关系曲线如图2所示。

可以看出，当坐封力达到40 kN时，MS密封胶胶筒肩部开始出现微量突出变形，当坐封力达到60 kN时，MS密封胶胶筒肩部突出变形达到了1. 8 mm，如果进一步提高坐封力，肩部突出变形随之进一步加大。对于一般封隔器来讲，其MS密封胶胶筒坐封力受结构设计的制约，一般选择50-60 kN。因此，一般封隔器在坐封过程中肩部突出变形是比较轻微的。http://www.sdyuantai.com/

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