REXROTH液控单向阀SL10GA1-42,上海韦米机电设备有限公司主营销售产品,原厂原装,质量保障,销售热线:13524123009,在线QQ:2896079243,传真:021-51334670;联系人:雷青。热诚欢迎新老客户咨询购买!
液控单向阀是依靠控制流体压力,可以使单向阀反向流通的阀。这种阀在煤矿机械的液压支护设备中占有较重要的地位。液控单向阀与普通单向阀不同之处是多了一个控制油路K,当控制油路未接通压力油液时,液控单向阀就象普通单向阀一样工作,压力油只从进油口流向出油口,不能反向流动。当控制油路油控制压力输入时,活塞顶杆在压力油作用下向右移动,用顶杆顶开单向阀,使进出油口接通。若出油口大于进油口就能使油液反向流动。
结构与工作原理:
锥阀结构的液控单向阀,它可以由液压开启而允许油液在闭锁方向自由流通。
此类阀用于有液压回路部分的隔离,以避免管路破裂时负载失压,或避免执行器在液压闭锁时因滑阀泄漏引起的爬行或漂移。
该阀的组成主要包括阀体(1) 、阀芯(2)、压缩弹簧(3)和控制活塞(4)
液控单向阀
基本功能:
可以由液压开启而允许反向流动,用来隔离局部压力回路,即作为在管子破裂时防止负载降落的保护,也可防止负载下爬。
锻压机械是指在锻压加工中用于成形和分离的机械设备。锻压机械包括成形用的锻锤、机械压力机、液压机、螺旋压力机和平锻机,以及开卷机、矫正机、剪切机、锻造操作机等辅助机械。锻压机械主要用于金属成形,所以又称为金属成形机床。锻压机械是通过对金属施加压力使之成形的,力大是其基本特点,故多为重型设备,设备上多设有安全防护装置,以保障设备和人身安全。
锻压机械主要包括各种锻锤、各种压力机和其他辅助机械。
锻锤,由重锤落下或强迫高速运动产生的动能对坯料做功,使之塑性变形的机械。锻锤是常见、历史悠久的锻压机械。它结构简单,工作灵活,功能性强、使用面广、易于维修,适用于自由锻和模锻。但震动较大,较难实现自动化生产。
锻锤的工作原理
锻锤靠高压气体突然释放的能量驱动上,下锤头高速运动,悬空对击,是金属塑性成形的锻造方法。高速锤锻造是一种高能率成形方法,主要用于精密模锻和热挤压。
瞬间释放的高压气体(压力一般为15000兆帕,迫使锤头向下作9~24米/秒的高速运动,同时也向上推动高压气缸的缸盖,并带动整个机架向上运动。锤头上的上模与机架上的下模在空中对击工件,使之塑性变形。机架的质量远大于锤体,所以移动速度慢,行程小,便于操作。锤击后,安装在机架内的回程杆将锤头推回原处。机架放置于外支架的缓冲垫上。这类设备初只能一次单击,后来研制出可以连击的﹑内燃式的高速锤。高速锤锻造,存在明显的变形惯性力和变形热效应,控制得当可以提高金属的塑性,改善金属在模具中的流动充填性能,利用模锻可成形薄壁﹑高肋的复杂形状锻件。高速锤锻造多用于叶片﹑齿轮等零件的精锻和挤压。
REXROTH液控单向阀SL10GA1-42
力士乐REXROTH液控单向阀SL 10...32
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力士乐REXROTH整流板
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液压控制 液压控制用油液作为工作介质,故能把由于功率的损耗而产生的热量,从发生的地方带到别处,这样在一定的功率情况下,可以大大减小部件的尺寸;从负载的影响看,液压系统具有机械上的刚性,用在闭环系统中,.刚度较大,位置误差较小;与机械机构相比,液压执行器的响应速度较高,能高速启动、制动与反向,同时其力矩—惯量比也较大,因而其加速能力较强;液压传动易实现无级调速,具有自身润滑等优点。