云南通风设备想问这些风管选型知识你掌握了吗？

1、FENGGUANNEIDEFENGSU

YIBANKONGDIAOFANGJIANDUIKONGDIAOXITONGDEXIANDINGDEZAOYINYUNXUZHIKONGZHIZAI40～50dB（A）ZHIJIAN，JIXIANGYINGNR（HUONC）SHUWEI35～45dB（A）。GENJUSHEJIGUIFAN，MANZUZHEIYIFANWEINEIZAOYINYUNXUZHIDEZHUGUANFENGSUWEI4～7m/s，ZHIGUANFENGSUWEI2～3m/s。TONGFENGJIYUXIAOSHENGZHUANGZHIZHIJIANDEFENGGUAN，QIFENGSUKECAIYONG8～10m/s。

2、CHUFENGKOUCHICUNDEJISUAN

WEIFANGZHIFENGKOUZAOYIN，SONGFENGKOUDECHUFENGFENGSUYICAIYONG2～5m/s。FENGKOUDECHICUNJISUANYUFENGGUANDAOCHICUNDEJISUANJIBENXIANGTONG，YIBANDANGCENGGAOZAI3~4MIDEFANGJIANDAYUEQUFENGSUZAI2~2.5MIMEIMIAO。GENJUJINGYANYIBANKEJIANGSHIMEIGEFENGKOUZAI20~25PINGFANGMIDEMIANJI，QIFENGLIANGDAYUEZAI500LIFANGMIZUOYOU。

3、HUIFENGKOUDEXIFENGSUDU

HUIFENGKOUWEIYUFANGJIANSHANGBUSHI，XIFENGSUDUQU4～5m/s，HUIFENGKOUWEIYUFANGJIANXIABUSHI，RUOBUKAOJINRENYUANJINGCHANGTINGLIUDEDIDIAN，QU3～4m/s ，RUOKAOJINRENYUANJINGCHANGTINGLIUDEDIDIAN，QU1.5～2m/s ，RUOYONGYUZOULANGHUIFENGSHI，QU1～1.5m/s 。

4、云南通风设备告诉您风管安装注意事项及风管计算

 ZAIFENGGUANSHEJIJINLIANGXIAODEQINGKUANGXIABAOZHENGZHUGUANFENGSU5m/s，ZHIGUANFENGSU3m/s，

 FENGGUANJISUANGONGSHI：SUOXUANSHEBEIFENGLIANG÷3600÷FENGSU=FENGGUANJIEMIANJI

 TONGSHIZHUYIBAOZHENGFENGGUAN：ZHANGBIAN÷DUANBIAN≤4 YIBANBUYAO＞4 TESHUQINGKUANGTESHUDUIDAI。

 FENGKOUDEXUANZE：SUOXUANFANGJIANFENGLIANG÷3600÷FENGSU=SANLIUQIHOUBUJIEMIANJI

 ZHUYI:SHUANGBAIYEFENGKOUJIEMIANJIWEIYISHANGGONGSHISUODEMIANJI÷0.7

5、JISUANFENGGUANCHICUN

1)DENGZUNIFA(DENGYAFA)SHIYIZHONGFANGBIANDEJISUANFA，SHIYONGYUDUOZHONGCHANGHE。

2)GENJUXIABIAOQUEDINGZHUFENGGUANZHONGDEJIBENZUNIXISHU。

FENGGUANLEIXING

ZUNIXISHU（mmH2o)

SONGFENGGUAN

0.05-0.2

HUIFENGGUAN

0.03-0.12

YINHUIFENGGUANWEIYUXIFENGBUWEI，ZHUYAOCHENGSHOUWAIBUYALI，YINGZHUYIJIANQINGQIFENGGUANFUDAN。DUIYUFENGGUANXITONG，CHANGCAIYONGSONGFENGGUAN0.08-0.15mmH2O/m，HUIFENGGUAN0.06-0.1 mmH2O/mZUOWEIJIZHUN。

6、在进行风管机的风管道设计时，注意在风管机的进、出风处加静压箱，以均衡风压，减少噪音，并且使静压箱内的流速保证在3米每秒以下，其长度可根据实际情况来定。

7、FENGYAGUSUAN

 RUWANTOU、SANTONG、BIANJINGDENGJIAOSHAODEQINGKUANGXIAMEIMISUNSHI4paZUOYOU。

 RUWANTOU、SANTONG、BIANJINGDENGJIAODUODEQINGKUANGXIAMEIMISUNSHI6paZUOYOU。

GUANDAOSHIBUFENGKOUSHIJIFENGKOU、SONGFENGGUANDAO、JINGYAXIANG、BAOWENCAILIAO、FENGFADENGGONGNENGWEIYITIDEZHONGYANGKONGDIAOMODUANSONGFENGXITONG。

GUANDAOSHIBUFENGKOUZAIYANGUANZHANGFANGXIANGSHANGHAIYOUYOUYUMOCAZULIHEJUBUZULIZAOCHENGDEYALISUNSHI。YINWEIYALISUNSHIYUFENGSUCHENGZHENGBIGUANXI，DANGQILIUYANGUANZHANGFANGXIANGFENGSUYUELAIYUEXIAOSHI，ZULISUNSHIYEBUDUANXIAJIANG。YUCITONGSHI，FENGGUANGEBIAOZHUNJIANYIJICHUFENGKOUYECUNZAIJUBUZULISUNSHI。GUANDAOSHIBUFENGKOUSONGFENGXITONGYIZHIGUANWEIZHU，XITONGZHONGSANTONG、WANTOUJIBIANJINGHENSHAO，YIBANYIYANCHENGZULISUNSHIWEIZHU，KONGQIHENGDUANMIANXINGZHUANGBUBIANDEGUANDAONEILIUDONGSHIDEYANCHENGMOCAZULIANXIASHIJISUAN：

——MOCAZULIXISHU；

——FENGGUANNEIKONGQIDEPINGJUNLIUSU，m/s；

——KONGQIDEMIDU，kg/m3；

——FENGGUANZHANGDU，m；

——YUANXINGFENGGUANZHIJING（NEIJING），m；

MOCAZULIXISHU SHIYIGEBUDINGZHI，TAYUKONGQIZAIFENGGUANNEIDELIUDONGZHUANGTAIHEFENGGUANGUANBIDECUCAODUYOUGUAN。

GENJUDUIXIANWEICAILIAOHEGUANDAOSHIBUFENGKOUDEZONGHEXINGYANJIUDEDAOMOCAZULIXISHU BUDAYU0.024（TIEPIFENGGUANDAYUE0.019），YOUYUGUANDAOSHIBUFENGKOUYANZHANGDUFANGXIANGSHANGDOUYOUSONGFENGKONG，GUANNEIPINGJUNFENGSUJIUSHIFENGGUANRUKOUSUDUDE1/2。YOUCIKEJIAN ，GUANDAOSHIBUFENGKOUDEYANCHENGSUNSHIBICHUANTONGTIEPIFENGGUANYAOXIAODEDUO。

BUJIANJUBUYASUNJISUAN

DANGGUANDAOSHIBUFENGKOUNEIQILIUTONGGUOWANTOU、BIANJING、SANTONGDENGDENGBUJIANSHI，DUANMIANHUOLIUXIANGFASHENGLEBIANHUA，TONGCHUANTONGFENGGUANYIYANGHUICHANSHENGXIANGYINGDEJUBUYALISUNSHI：

Z：JUBUYALISUNSHI（pa）

ξ：JUBUZULIXISHU（ZHUYAOYOUSHIYANCEDE，TONGCHUANTONGFENGGUANZHONGLEISI）

ρ：KONGQIMIDU（kg/m3）

v：FENGSU（m/s）

WEILEJIANSHAOGUANDAOSHIBUFENGKOUDEJUBUSUNSHI，WOMENTONGCHANGJINXINGYIDINGDEYOUHUASHEJI：

1． ZONGHEDUOZHONGYINSUXUANZEGUANJING，JINLIANGJIANGDIGUANDAONEIFENGSU。

2． YOUHUAYIXINGBUJIANSHEJI，BIMIANLIUXIANGGAIBIANGUOJI、DUANMIANBIANHUAGUOKUAI。

GENJUSHIJIGONGCHENGJINGYAN，WOMENZONGJIECHUGEZHONGGUANDAOSHIBUFENGKOUBUJIANDEJUBUZULIZHI（FENGSU＝8m/s），RUXIABIAO：

LIRU：MOUCHAOSHIYASUNJISUANSHUOMING

DUIYUGAICHAOSHI，AHU KONGDIAOXIANGFENGLIANGWEI36000CMH，XUANQUBIANHAOAHU-14HAOKONGDIAOXIANGXITONG，ZHUGUANCHICUNWEI2000*610mm，GONGYOU5ZHIZHIGUAN，ZHIGUANGUANJINGWEI559mm。XUANQUZUIZHANGBULIHUANLU25MIZHUGUAN+20.6MIZHIGUANZUOWEIJISUANYIJU；

YANCHENGZULISUNSHIJISUAN：

ZHUGUAN：25MI， 2000*610mm，DANGLIANGZHIJING ，

ZHIGUANDAO：20.6MI， 559mm，，

JUBUZULISUNSHIJISUAN：

DENGJINGSANTONGJUBUSUNSHIWEI12Pa，DUIYUBIANJINGSANTONGQU20Pa.

ZUIZHANGBULIHUANLUYASUNWEI20+8.5+6=34.5Pa.

KEJIANGUANDAOSHIBUFENGKOUYOUQISHIZHIGUANXITONGDEYANCHENGZULISUNSHIFEICHANGXIAO，YUNNANTONGFENGSHEBEIGAOSUNINFENGGUANYIBANBUHUICHAOGUOJINGYAFUDEDEZHI，SUOYIZAICUSUANSHIJIBENKEYIHULVEBUJI!

SHOUXIANBAJUXINGFENGGUANZHUANHUANCHENGDANGLIANGDEYUANXINGFENGGUAN。

JIEMIANJI=BANJING*BANJING*3.14。

320*250=0.08(PINGFANGMI)，JUXINGFENGGUANDEJIEMIANJIWEI0.08(PINGFANGMI)；

BANJING=√(0.08/3.14)=0.159(MI)；YUANXINGGUANDAOZHIJING=0.159*2=0.319(MI)；

ZHU：√-KAIPINGFANG。

JISUANFENGJIQUANYA：

YIZHIMEICENGLOUGAOWEI3MI，GONGLIUCENGGAO，GUGUANDAOZONGZHANGYUEWEI18MI，FENGLIANGWEI5000LIFANGMI/MEIXIAOSHI，GENJUSHANGSHUTIAOJIANSHOUXIANJISUANFENGSU。

FENGSU=FENGLIANG/(BANJING*BANJING*3.14*3600)=5000/(0.159*0.159*3.14*3600)=17.5(MI/MIAO)；

JISUANMEIMIGUANDAODEYANCHENGMOCAZULI：

R=(λ/D)*(ν^2*γ/2)=(0.09/0.319)*(17.5^2*1.2/2)=51.6(Pa)

YANCHENGMOCAZONGZULI：

H=RL=51.6*18=929(Pa)

FENGJIQUANYA=1.1H=1.1*929=1022(Pa)。

γ-KONGQIMIDU，KEXUAN1.2；ν-LIUSU(m/s)；D-GUANDAOZHIJING(m)；R-YANCHENGMOCAZULI(Pa)；L-GUANDAOZHANGDU(m))；√-KAIPINGFANG；λ-GUANDAOZULIXISHU。

8、JIEFENGGUANDEFENGPANDEFENGKOUSHEJI

1）DIYIGESONGFENGKOUYUFENGPANDECHUFENGKOUDEJULIYAOSHIDANG；

2）DAIYOULIANGGECHUFENGKOUDEFENGPANSONGFENGGUANYAOBIANJING；

3）FENGPANDESONGFENGKOUYUHUIFENGKOUJULIYAOSHIDANG。（≤5MI）

9、FENGKOUDEXUANYONG.

① XINFENGKOU，SONGFENGKOUYONGSHUANGCENGBAIYEFENGKOU

② HUIFENGKOUYONGGEZHAFENGKOU

③ PAIFENGKOUYONGSHUANGCENGBAIYE

④ FUXITONGYOUYUFENGLIANGYIBANBIJIAOXIAO，RUYAOQIUDONGJICAINUANXUYAO，YICAIYONGYONGSHUANGCENGBAIYE，BUNENGYONGSANLIUQI。FENGJIPANGUANDAILIANGGEFENGKOUSHIYIXUANYONGDAIDIAOJIEFADESHUANGCENGBAIYE。

(BENWENNEIRONGLAIYUANYUWANGLUO，RUYOUQINQUANQINGLIANXISHANCHU)