螺杆泵的填料

　　螺杆泵的填料
　　Screw fill

　　建议使用膨胀石墨，膨胀石墨是天然石墨经强氧化混合酸处理后成为氧化石墨。氧化石墨受热分解放出二氧化碳，体积急剧膨胀，形成了疏松柔软又有韧性石墨。膨胀石墨做成板材后压模成密封填料，他具有多孔，疏松，耐热，化学性质稳定，自润滑和不渗透性好，压缩强度为70-115mpa，回弹率35%-50%
　　Recommend the use of expanded graphite, natural graphite, expandable graphite is mixed by the strong oxidizing acid treatment became graphite oxide. Thermal decomposition of graphite oxide release carbon dioxide, the rapid expansion of the volume, forming a loose soft graphite have toughness. After the die made of expanded graphite sheet into a sealed filler, he has a porous, loose, heat-resistant, chemically stable, self-lubricating and non-permeability, compressive strength for the 70-115mpa, rebound rate of 35% -50%