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何为气动阀门
点击次数:2508 更新时间:2009-11-02
从气阀工作原理来看,气阀工作性能将直接影响压缩机气缸的工作,因此,对气阀有如下要求:阻力损失小。气阀阻力损失大小与气流的阀隙速度及弹簧力大小有关。气速越高,能量损失越大;弹簧力过大,阻力损失也大,其大小按气阀运动规律的合理性准则设计确定。气阀关闭及时、迅速,关闭时不漏气,以提高机器的效率,延长使用期。寿命长、工作可靠。限制气阀寿命的主要因素是阀片及弹簧质量,一般对长期连续运转的压缩机,希望寿命达8000小时以上;对移动式、短气阀是往复活塞式压缩机中的重要部件,也是易损坏的部件之一。它的好坏直接影响压缩机的排气量、功率消耗及运转的可靠性,目前压缩机正向高速方向发展,而限制转速提高的关键问题之一就是气阀。活塞式压缩机一般都采用“自动阀”,就是气阀的开启与关闭是依靠阀片两边的压力差实现的,没有其它的驱动机构。期或间歇运转的压缩机,要求可稍低些。    
From   the   air   valve   operating   principles   of   view,   air   valve   performance   will   directly   affect   the   work   of   compressor   tanks,   air   valve   for   the   following   requirements   :   resistance   losses   small.   Air   valve   size   and   airflow   resistance   losses   of   valves   always   speed   and   the   size   of   the   spring-loaded   edge.   Gas   higher   speed,   the   greater   the   energy   losses;   Spring-loaded   edge   too   large,   the   loss   is   great   resistance,   the   size   of   the   air   valve   movement   design   guidelines   to   determine   the   reasonableness   of   the   law.   Air   valve   closed   timely,   rapid,   not   leak   closed   to   improve   the   efficiency   of   machines   and   extended   use   period.   Long   life,   work   reliable.   Life   is   the   main   factor   restricting   air   valve   and   spring-loaded   valves   quality,   the   general   long-term   continuous   operation   of   the   compressors   to   life   80   hours;   For   ,   short-term   or   intermittent   operation   of   compressors,   may   require   slightly   more.
Air   valve   and   piston-type   compressors   are   to   the   important   components   is   one   of   the   components   easily   damaged.   It   will   have   a   direct   impact   on   the   displacement   compressors,   power   consumption   and   reliability   of   operation,   the   current   compressor   is   fast   direction,   and   rotational   speed   limit   is   one   of   the   key   issues   in   improving   air   valve.   Piston-type   compressors   typically   use   the   "automatic   valve"   that   the   air   valve   is   opened   and   closed   valves   on   the   pressure   on   both   sides   to   achieve   poor,   and   there   is   no   other   drive.
 


 

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