SMC止动气缸全新进口,SMC气缸,RSDQA40-30DB
SMC止动气缸的密封性能差,容易产生外 泄漏.在使 l-节流阀 2-缓冲柱塞 3-密封带 4-防尘不锈钢带 5-活塞 6-滑块 7-活塞架 用三位阀时必须选用中压式;2) 受负载力小,为了增加负载能力,必须增加导 向机构. 机械接触式无杆气缸 l-节流阀 2-缓冲柱塞 3-密封带 4-防尘不锈钢带 5-活塞 6-滑块 7-活塞 架 (6)锁紧气缸 带有锁紧装置的气缸称为锁紧气缸按锁紧位置分为行程末端锁 紧型和任意位置锁紧型. 1)行程末端锁紧型气缸,当活塞运动到行程末端,气压释放后,锁 定活塞 1 在弹簧力的作用下插入活塞杆的卡槽中,活塞杆被锁定.供气加压时,锁定活塞 1 缩回退出卡槽而开锁,活塞杆便可运动. 带端锁气缸的结构原理 a)手动解除非锁式 b)手动解除锁式. 1-锁定活塞 2-橡胶帽 3,12-帽 4-缓冲垫圈 5-锁用弹簧 6-密封件 7-导向套 8-螺钉 9-旋钮 10-弹簧 11-限位环 2) 任意位置锁紧型气缸 按锁紧方式可分为卡套锥面式, 弹簧式和偏心式等多种形式. 卡套锥面式锁紧装置由锥形制动活塞 6,制动瓦 1,制动臂 4 和制动弹簧 7 等构成,其结构.作用在锥状锁紧活塞上的弹簧力由于楔的作用而被放大,再由杠杆 原理得到放大. 这个放大的作用力作用在制动瓦 1 上, 把活塞杆锁紧. 要释放对活塞的锁紧, 向供气口 A′供应压缩空气,把锁紧弹簧力撤掉.
SMC止动气缸全新进口,SMC气缸,RSDQA40-30DB
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SMC止动气缸全新进口,SMC气缸,RSDQA40-30DB
SMC气缸的为防止活塞左右两腔相互窜气,设有活塞密封圈。活塞上的耐磨环可提高气缸的导向性,减少活塞密封圈的磨耗,减少摩擦阻力。耐磨环长使用聚氨酯、聚四氟乙烯、夹布合成树脂等材料。活塞的宽度由密封圈尺寸和必要的滑动部分长度来决定。滑动部分太短,易引起早期磨损和卡死。活塞的材质常用铝合金和铸铁,小型缸的活塞有黄铜制成的.
SMC气缸的下面是气缸理论出力的计算公式:
F:气缸理论输出力(kgf)
F′:效率为85%时的输出力(kgf)--(F′=F×85%)
D:气缸缸径(mm)
P:工作压力(kgf/C㎡)
例:直径340mm的气缸,工作压力为3kgf/cm2时,其理论输出力为多少?芽输出力是多少?
将P、D连接,找出F、F′上的点,得:
F=2800kgf;F′=2300kgf
在工程设计时选择气缸缸径,可根据其使用压力和理论推力或拉力的大小,从经验表1-1中查出。
例:有一气缸其使用压力为5kgf/cm2,在气缸推出时其推力为132kgf,(气缸效率为85%)问:该选择多大的气缸缸径?
●由气缸的推力132kgf和气缸的效率85%,可计算出气缸的理论推力为F=F′/85%=155(kgf)
●由使用压力5kgf/cm2和气缸的理论推力,查出选择缸径为?63的气缸便可满足使用要求。
SMC止动气缸全新进口,SMC气缸,RSDQA40-30DB
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SMC止动气缸全新进口,SMC气缸,RSDQA40-30DB