MS密封膠膠筒壓縮變形特征分析

發布時間 : 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密封膠膠筒壓縮變形特征分析

(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.

發布時間 : 2025-8-5 10:51:16
Views:

根據室內試驗數據繪制了壓縮式MS密封膠膠筒軸向載荷與壓縮量的關系曲線，如圖1所示。可以看出，MS密封膠膠筒的變形過程可以分為彈性變形、約束變形和穩定變形3個階段。

彈性變形階段

MS密封膠膠筒受軸向載荷被壓縮后，徑向逐漸擴張，在此階段，MS密封膠膠筒與套管之間沒有接觸，MS密封膠膠筒完全沒有密封能力，隨著軸向載荷的增加，進一步加大MS密封膠膠筒的軸向壓縮和徑向擴張。軸向載荷與壓縮量呈線性關系(如圖1 AB段所示)。

約束變形階段

從MS密封膠膠筒外徑和套管內壁相接觸起，至MS密封膠膠筒工作面完全和套管內壁相接觸的變形過程，即為約束變形階段。在此階段，由于變形受到限制，受力狀況發生了改變，既有軸向力同時又有套管內壁對MS密封膠膠筒的作用力。軸向載荷與壓縮量失去了線性關系(如圖1BC段所示)。

穩定變形階段

MS密封膠膠筒在軸向載荷作用下，壓縮量不再繼續發生變化的階段稱為穩定變形階段。在此階段，MS密封膠膠筒工作面完全和套管內壁相接觸，軸向壓縮量達到了最大值。

在試驗過程中發現，由于MS密封膠膠筒兩端的承壓座與套管內壁之間有5 mm間隙，隨著軸向載荷的逐步增加，MS密封膠膠筒將產生肩部突出變形現象，導致軸向壓縮量進一步發生微量變化(如圖1 CD段所示)。

MS密封膠膠筒突出變形與軸向載荷的關系

軸向載荷主要包括MS密封膠膠筒的坐封力和工作壓差產生的對MS密封膠膠筒的軸向壓縮力。在本次試驗研究過程中，軸向載荷均由拉力試驗機提供。

坐封力與突出變形的關系

選用硬度為邵爾74 A，倒角為300的3“MS密封膠膠筒，利用拉力試驗機施加坐封力，對加載端的肩部突出變形進行試驗分析，得出的坐封力與MS密封膠膠筒突出變形的關系曲線如圖2所示。

可以看出，當坐封力達到40 kN時，MS密封膠膠筒肩部開始出現微量突出變形，當坐封力達到60 kN時，MS密封膠膠筒肩部突出變形達到了1. 8 mm，如果進一步提高坐封力，肩部突出變形隨之進一步加大。對于一般封隔器來講，其MS密封膠膠筒坐封力受結構設計的制約，一般選擇50-60 kN。因此，一般封隔器在坐封過程中肩部突出變形是比較輕微的。http://www.kubee.cn/

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