南京泽登机电专业代理SMC气缸/油缸
:张  慧
传真:
:381045766  公司:http://www.njzdjd.com
SMC气缸种类:气压传动中将压缩气体的压力能转换为机械能的气动执行元件。气缸有作往复直线运动的和作往复摆动的两类（见图）。作往复直线运动的气缸又可分为单作用、双作用、膜片式和冲击气缸 4种。 　　①单作用气缸：仅一端有活塞杆，从活塞一侧供气聚能产生气压，气压推动活塞产生推力伸出，靠弹簧或自重返回。 　　②双作用气缸：从活塞两侧交替供气，在一个或两个方向输出力。 　　③膜片式气缸：用膜片代替活塞，只在一个方向输出力，用弹簧复位。它的密封性能好，但行程短。 　　④冲击气缸：这是一种新型元件。它把压缩气体的压力能转换为活塞高速（10～20米/秒）运动的动能，借以作功。冲击气缸增加了带有喷口和泄流口的中盖。中盖和活塞把气缸分成储气腔、头腔和尾腔三室。它广泛用于下料、冲孔、破碎和成型等多种作业。作往复摆动的气缸称摆动气缸，由叶片将内腔分隔为二，向两腔交替供气，输出轴作摆动运动，摆动角小于 280°。此外，还有回转气缸、气液阻尼缸和步进气缸等。
SMC气缸结构:气缸是由缸筒、端盖、活塞、活塞杆和密封件组成，其内部结构如图所示： SMC气缸原理图 　　1）缸筒 缸筒的内径大小代表了气缸输出力的大小。活塞要在缸筒内做平稳的往复滑动，缸筒内表面的表面粗糙度应达到Ra0.8um。对钢管缸筒，内表面还应镀硬铬，以减小摩擦阻力和磨损，并能防止锈蚀。缸筒材质除使用高碳钢管外，还是用高强度铝合金和黄铜。小型气缸有使用不锈钢管的。带磁性开关的气缸或在耐腐蚀环境中使用的气缸，缸筒应使用不锈钢、铝合金或黄铜等材质。 SMC CM2气缸活塞上采用组合密封圈实现双向密封，活塞与活塞杆用压铆链接，不用螺母。 2）端盖 端盖上设有进排气通口，有的还在端盖内设有缓冲机构。杆侧端盖上设有密封圈和防尘圈，以防止从活塞杆处向外漏气和防止外部灰尘混入缸内。杆侧端盖上设有导向套，以提高气缸的导向精度，承受活塞杆上少量的横向负载，减小活塞杆伸出时的下弯量，延长气缸使用寿命。导向套通常使用烧结含油合金、前倾铜铸件。端盖过去常用可锻铸铁，现在为减轻重量并防锈，常使用铝合金压铸，微型缸有使用黄铜材料的。
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