广东11选5

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氣體通過調節閥控制閥門的特性
來源:sdhuaya.com


氣體通過調節閥控制閥門的特性

摘要:氣體介質因為其固有的特性——可壓縮性,在閥門的流動中不同于液體。比如在節流過程中,因為在節流孔口處強烈的擾動和渦流,導致能量分布的不均,極容易產生噪聲。本文主要討論氣體在流經閥門設備時參數的變化與流道截面積的關系,以及流動過程中氣體能量的傳遞、轉換等問題。


關鍵詞:可壓縮性;能量轉換;噪音;控制閥

1 XULUN

   GONGCHENGZHONG,CHANGJIANDEQITILIUDONGDOUSHIWENDINGLIUDONGHUOJIEJINWENDINGDELIUDONG。TONGSHIRENHEYIGEJIEMIANSHANGRENYIDIANDELIUSU、YALI、WENDUCANSHUYEJUNBUXIANGTONG。QIEGONGZHIZAILIUDONGZHONGKENENGYUWAIJIEJIAOHUANRELIANG。SHANGSHUGUOCHENGSHIJIQIFUZADE,WEILEJIANHUAWENTIDEYANJIU,KAOLVDAOGONGCHENGZHONGQITIKUAISUDITONGGUOFAMEN,RENWEILAIBUJIYUFAMENJINXINGREJIAOHUAN。TONGSHIQUGEJIEMIANMOUCANSHUDEPINGJUNZHIZUOWEIGAIJIEMIANSHANGGEDIANCANSHUDEZHI,YINCIBAQITIGONGZHIDELIUDONGKANZUOBUKENIDEYIWEIJUEREWENDINGLIUDONG。

广东11选5 2 NENGLIANGSHOUHENGFANGCHENG

广东11选5 YOURELIXUEDIYIDINGLV,ZAIKAIKOUXITONGWENDINGLIUDONGDENENGLIANGWEIFENBIAODASHIWEI:

熱力學第一定律 

HULVEZHONGLIDEZUOYONG,YEBUKAOLVDUIFAMENZUOGONG。TONGSHI,KAOLVDAOLIUTIHEFAMENDEMOCAZUOYONG、LIUDONGZHONGLIUTIKEFUMOCALIZUODEGONGZHUANHUAWEIRELIANG,ERZHEBUFENRELIANGYOUZHONGXINBEIJIARUDAOLIUDONGDELIUTIZHONG。SHANGSHIJIANHUAWEI:

公式 

HENXIANRAN,KEFUMOCAXIAOHAODEGONGδwMOCAHEYOUTAZHUANHUANDERELIANGδqXISHIXIANGDENGDE,ERδqWEIYUWAIJIEJIAOHUANDERELIANG,DUIYUJUERELIUDONG,GAIZHIWEI0,JIYOU

公式2 

DUISHANGSHIJINXINGJIFEN,YINCI,YANLIUDONGFANGXIANGRENYIJIEMIANYINGMANZU

常數 

3 JIEMIANCANSHUBIANHUA

广东11选5 GENJUCANKAOWENXIAN1,KEYIDECHUJUEREDENGSHANGLIUDONGZHONGCANSHUBIANHUADEXIANGDUIGUANXI。JIANYIXIAGONGSHI:

參數變化公式 

參數變化公式2 

參數變化公式03 

QIZHONG:vWEIBITIJI

cWEILIUSU

AWEIJIEMIANJI

广东11选5 кWEIBIREBIXISHU

广东11选5     SUIRANSHANGSHUGONGSHISHIYOUJUEREDENGSHANGLIUDONGTUICHU,DANDUIYUJUERELIUDONGDEJIEMIANCANSHUBIANHUAFENXIJUYOUZHIDAOYIYI。YOUYISHANGSANGEGONGSHIKEYIKANCHU,CANSHUDEBIANHUAYUQITIDEMAHESHUYOUGUAN。DANGQITIJIEZHIJINRUFAMENSHI,CHUYUYASHENGSULIUDONG。ZAITONGGUOJIELIUKOUCHU(JIANTU1),YINWEIMIANJIJIANXIAO,LIUSUHUIZENGJIA,YALIJIANGDI,BITIJIZENGJIA,JIEZHIPENGZHANG。TONGGUOJIELIUKOUHOU,LIUTONGMIANJIBIANDA,LIUSUJIANGDI,YALIHUIFU,BITIJIJIANXIAO,JIEZHIYASUO。DANYINWEIZAIFAMENJIELIUKOUCHUDEMOCADAOZHIDENENGLIANGZHUANHUAN,YALIYIBUKENENGHUIFUDAOFAQIANYALI。LIUCHUFAMENHOU,XIANGBIJIAOFAQIANZHUANGKUANG,FAHOUYALIJIANXIAO,LIUSUYOUYIDINGZENGJIA,JIEZHIMIDUYOUYIDINGJIANXIAO。

氣體通過控制閥原理 

TU1

广东11选5    RUGUOZAIJIELIUKOUCHUDEMIANJIJIANXIAODEZUGOUXIAO,LIUSUYOUKENENGZENGJIADAOSHENGSU。CISHI,ZHENGGEFAMENDEZHILIANGLIULIANGDADAOZUIDAZHI。RUOCISHIJINYIBUZENGJIAMIANJI,ZEQITIPENGZHANGZHICHAOYINSU,YALIJINYIBUJIANGDI。YOUKENENGCHANSHENGJIAODADEZAOYIN。DANZHILIANGLIULIANGBUZAIZENGJIA。ZHEZHONGQINGXINGJISHIQITIXUANXINGSHIPENGDAODEZUSAILIUQINGXING。DUIYUDUOJIJIANGYADEFANEIJIANJIEGOU,YOUQIYAOZHUYIZHEZHONGLIUSUZENGJIADEZHUANGKUANG。YINWEIDUOJIJIANGYANEIJIANTONGCHANGBEISHEJICHENGRUXIADEXINGSHI(JIANTU2)。TONGCHANGZUIWAIMIANDETAOTONGMIANJIJIAODA,RANHOUJIANXIAO,DAOZUILICENGTAOTONGDEMIANJIZUIXIAO。ZHEZHONGCONGWAIDAOLILIUDESHEJIFANGSHIDUIYUYETIGONGKUANGLAIJIANGXIAOGUOHENHAO,TAYOUXIAODIZENGDALEZUNI,JIANGDILEYACHA。DANSHIDUIYUQITIGONGKUANGLAIJIANG,XIAOGUOQUEQIAQIAXIANGFAN。YOUYUJIELIUMIANJIZHUJIBUDUANSHOUSUO,QITIBUDUANJIASU,YALIBUDUANJIANGDI,MIDUCHIXUJIANXIAO,JIEZHIBUDUANPENGZHANG,JIYOUKENENGBEIPENGZHANGZHIYINSUSHENZHICHAOYINSU。CISHI,HUIYINQIHENQIANGDEZHENDONG。YINWEIZHENDONGDEQIANGRUOSHIHELIUSUDEPINGFANGCHENGZHENGBIDE。QINGZHEYINQIZAOYINHENDA,ZHONGZHESHENZHINENGPOHUAIGUANDAO。YINCIDUIYUDUOJIJIANGYAJIEGOULAIJIANG,QITILIUXIANGYINGDANGCONGLIWANGWAILIU。XIANRANGQITIJIELIUJIANGYA,RANHOUZHUJIANSHIDUYASUO,YIKONGZHINEIBUDELIUSU。FANGZHIZHENDONGDEYINGXIANG(JIANTU2)。

氣體通過控制閥原理圖2 

TU2

GENJUCANKAOWENXIAN3,DUIYIWEIJUEREDENGSHANGLIUDONG,YOURUXIAGONGSHICHENGLI:

 公式

QIZHONG:pcrWEILIUSUDADAODANGDISHENGSUSHIDEJIEZHIYALI

广东11选5       p0WEIDANGJIEZHISUDUJIANWEI0SHIDEJIEZHIYALI,CHENGWEIZHIZHIYALI,YECHENGWEIZONGYALI,SHIYIGELILUNZHI

广东11选5       vcrWEILINJIEYALIBI

      кWEIBIREBIXISHU

广东11选5 SHANGSHIBIAOMINGLEDANGLIUSUDADAODANGDISHENGSUSHI,JISHIZHILIANGLIULIANGDADAOZUIDASHI,YEJIUSHICHUXIANZUSAILIUDESHIHOUDEYALIBIZHI,ZHEGEBIZHIZHIYUGONGZHIXINGZHIYOUGUAN。XIANLIEJUJIGECHANGJIANDESHUZHI,JIANBIAO1:

QITI

SHUANGYUANZIQITI

广东11选5 GUOREZHENGQI

GANBAOHEZHENGQI

к

广东11选5 1.4

1.3

1.135

广东11选5 vcr

广东11选5 0.528

0.546

广东11选5 0.577

BIAO1

广东11选5 CONGSHANGBIAOKEYIKANCHU,QITIXINGZHISUIRANBUTONG,DANLINJIEYALIJUNYUEDENGYU0.5。KAOLVDAOGONGCHENGZHONGWUCHADEYUNXUFANWEI,ZHEJIUSHIQITIGONGKUANGXUANXINGZHONGDEPANDINGZUSAILIUDERENDINGTIAOJIAN:FAHOUYALI/FAQIANYALI≥0.5SHI,RENWEIHUICHUXIANZUSAILIU。

4 JIELIUHOUWENDUDEBIANHUA

    QITITONGGUOFAMENJIELIUGUOCHENGZHONGDEWENDUBIANHUABIJIAOFUZA,JIELIUHOUWENDUKENENGHUIJIANGDI,KENENGHUISHENGGAO,YEKENENGBUBIAN。YAOPANDINGJIELIUHOUWENDUDEBIANHUAQINGKUANG,XUYAOPANDINGJIEZHIDEJIAOER—TANGMUXUNXISHUμJ,GAIXISHUSHIBIAOZHENGZAIHANZHIBUBIANDEQINGKUANGXIAWENDUDUIYALIDEWEIFENGUANXI。YOUCANKAOWENXIAN2TIGONGDEQUXIANTUKEZHI(TU3):

壓力關系圖 

TU3

广东11选5 ZAIZHUANHUIQUXIANHEWENDUZHOUNEIBUBAOHANDEQUYU,μJ>0,CHENGWEILENGXIAOYINGQU。FAQIANWENDUCHUYUGAIQUYUNEIDEQITIJIEZHI,JIELIUHOUWENDUHUIJIANGDI。QIEYACHAYUEDA,WENDUXIAJIANGDEYUEDI;ERZAIZHUANHUIQUXIANHEWENDUZHOUWAIBUBAOHANDEQUYU,μJ<0,CHENGWEIREXIAOYINGQU。FAQIANWENDUCHUYUGAIQUYUNEIDEQITIJIEZHI,JIELIUHOUWENDUHUISHENGGAO;RUOFAQIANWENDUGANGHAOCHUYUZHUANHUIQUXIANSHANG,ZETONGGUOFAMENJIELIUHOUWENDUBUBIAN。SHIJISHANGDADUOSHUDEQITIJINGJIELIUHOUWENDUDOUHUIJIANGDI,ZHIYOUJISHAOSHUQITI,RUH2HEHeZAICHANGWENXIAJIELIUHOUDEWENDUHUISHENGGAO。LIRUTIANRANQIDEYEHUAJIUSHILIYONGGAITEXINGLAIJINXINGDE。

5 ZONGJIE

广东11选5 BENWENJINDUIGONGCHENGZHONGQITITONGGUOFAMENDEYIXIELIUDONGTEXINGJIGONGCHENGXUANXINGDEYIXIEZHUYISHIXIANGJINXINGLEDINGXINGFENXI。YOUYUJIEZHITONGGUOFAMENSHIGAODUMOCA,QIANGLIEDERAODONGYIJIDALIANGDEWOLIU,CHUYUJIDUBUPINGHENGZHUANGTAI,YINCIWUFAJINXINGHENJUTIDEJISUANFENXI,ZHINENGJIEZHUCFD(JISUANLIUTILIXUE)RUANJIANLAIJINXINGFENXI,JIEHESHIJIGONGKUANGJINGYANLIANHEPANDUAN。


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