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自力式调节阀的原理是什么呢?

发布时间:2015-01-28 关注次数:

ZAISHIYONGGUOCHENGZHONG,SHIYONGDEXUANXINGHEANZHUANGHUANJINGSHIYAOZHUYIDE,YINCI,XIANGXILEJIEZILISHIDIAOJIEFADEGONGZUOYUANLIHEJIEGOUSHIFEICHANGZHONGYAODE。

ZILISHIDIAOJIEFAYINWEIBUXUYAOQITADEWAILAINENGYUAN,BIRUDIANYUAN、QIYUAN,JINKAOJIEZHIZISHENDENENGLIANGLAIQUDONG,JIJIENENGYOUHUANBAO,SHIYONGFANGBIAN,ANZHUANGWANBIHOUSHEDINGHAOYALIZHIJIKETOURUZIDONGYUNXING,SUOYIZAIDUIKONGZHIJINGDUYAOQIUBUGAO,YOUQUEFADIANYUAN、QIYUANDECHANGHE,DEDAOLEYUELAIYUEGUANGFANDESHIYONG。DANZAISHIYONGGUOCHENGZHONG,YIDINGYAOZHUYIXUANXINGDETESHUXING,FOUZERONGYIYINQISHIGU。

  结构及工作原理
工艺介质的阀前压力Pl经过阀芯、阀座的节流后,变为阀后压力P2。P2经过控制管线输入执行器的下膜室作用在顶盘上,产生的作用力与弹簧的反作用力相平衡,决定了阀芯、阀座的相对位置,控制阀后压力。当阀后压力P2增加时,P2作用在顶盘上的作用力也随之增加。此时顶盘的作用力大于弹簧的反作用力,使阀芯关向阀座的位置,直到顶盘的作用力与弹簧反作用力相平衡为止。这时,阀芯与阀座之间的流通面积减少,流阻变大,从而使P2降为设定值。同理,当阀后压力P2降低时,作用方向与上述相反,这就是阀后压力调节时的工作原理。当需要改变阀后压力P2的设定值时,可调整调节螺母8。

自力式调节阀

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