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直管壓力平衡型波紋補償器

該種膨脹節由2個工作波紋管、一個平衡波紋管以及端板、平衡拉桿(或舌管)組成,其平衡波紋管的有效面積是工作波紋管有效面積的兩倍,這樣工作波紋管內壓引起的向外側的軸向推力通過平衡拉桿(或舌管)被平衡波紋管因內壓引起的相反方向的推力所抵消,而無軸向推力輸出,故管道設備不再承受內壓軸向推力(盲板力),而只承受膨脹節位移時產生的剛度反力,因為與盲板力相比,剛度反力比盲板力小幾十倍,所以,使設備和管路的固定變得簡單可行,該類膨脹節只能吸收軸向位移。

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