排列5缩水过滤工具

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【行业知识】特殊工况机械密封方案

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【行业知识】特殊工况机械密封方案

发布日期:2019-03-02 作者:机械密封 点击:

机械密封.jpg

排列5缩水过滤工具JIBENGZHUANGZHIZHONG,JIDONGSHEBEIDEJIXIEMIFENGYUEZHANZHENGGEDONGMIFENGSHULIANGDE80%-85%。ERZAIJIBENGGUZHANGZHONG,JIXIEMIFENGDEGUZHANGDAYUEZHANZHENGGEWEIXIUGONGZUOLIANGDEYIBAN。KEJIANJIXIEMIFENGZAIJIBENGWEIXIUZHONGSUOZHANDEWEIZHI。YOUYUJIBENGSUOSHUSONGDEJIEZHIQIANCHAWANBIE,GONGYITIAOJIANGEBUXIANGTONG,SUOYILEJIEZHEIXIEQINGKUANGDUIJIFENGDEXUANZEJIWEIHUHENZHONGYAO。JIEHEDUONIANLAIZAIJIFENGXUANZEHEWEIXIUZHONGDEJINGYAN,JIESHAOJIZHONGTESHUGONGKUANGXIAJIXIEMIFENGDEGONGZUOTEDIANHEZHUYISHIXIANG。

 一、高温下的机械密封

 YIBANQINGKUANGXIA,JIEZHIDEWENDUCHAOGUO120℃JIRENWEISHIGAOWENMIFENG。CISHIJIXIEMIFENGCUNZAIDEZHUYAOWENTIYOU:(1)YOUYUMOCAFUDUANMIANWENDUSHENGGAO,DAOZHIMIFENGDUANMIANJIANYEMOQIHUA,MOCAXISHUSUIZHIZENGDA,MOSUNJIAJU,WENSHENGJIADA,MIFENGHUANCHANSHENGREBIANXINGHUORELIEERSHIXIAO;(2)JIXIEMIFENGZHONGDEFUZHUMIFENGQUANCAILIAOYIBANWEIXIANGJIAOHUOJUSIFUYIXI,YOUYUZHANGSHIJIANZAIGAOWENHUANJINGZHONG,RONGYILAOHUAHEFENJIE,ZAOCHENGMIFENGSHIXIAO;(3)GAOWENXIAJIXIEMIFENGDEDANXINGYUANJIANYICHANSHENGPILAOHERUBIAN,SHIMIFENGSHIXIAO;(4)GAOWENHUIJIAJUJINSHUCAILIAODEFUSHI,SUODUANJIFENGDESHIYONGSHOUMING。

 为保证机械密封在高温环境下正常工作,可以采取如下措施。


 1.JIJIFENGZENGJIALENGQUECHONGXIZHUANGZHI。

 2.选择耐高温的材料,根据不同的工作温度选用不同的材料。丁腈橡胶温度上限为80℃,硅橡胶和氟橡胶为200℃,聚四氟乙烯为250℃。另外,机械密封中的非金属摩擦副多采用石墨浸渍材料制成,所以也要根据不同的工作温度选用不同种类的浸渍石墨。一般浸巴氏合金石墨适用温度范围小于150℃,浸树脂石墨适用温度范围为170~200℃,浸铜、铝、铅的石墨可在小于400℃的工作条件下使用。动环组件应尽可能选用膨胀系数相近的材料,以防止高温下动环和动环座的连接松动。

 3.选择金属波纹管机械密封。金属波纹管密封近年来在高温密封中使用很多,并且取得了很好的效果。在该种机封中,金属波纹管取代了普通机封中的弹簧,省去了动环辅助密封圈,不需要克服动环补偿时与转轴的摩擦和磨损,因此在高温下使用,一般都能取得不错的效果。

 二、低温下的机械密封

排列5缩水过滤工具 ZAILIANYOUHUAGONGZHUANGZHIZHONG,DIWENSHUSONGDEJIEZHIYIBANDOUJUYOUHUODUXIAO、RUNHUAXINGCHA、RONGYIQIHUADETEDIAN,ERQIEJIEZHIZAIQIHUASHIDALIANGXIRE,SHIZHOUWEIWENDUJIJUXIAJIANG,ZAOCHENGKONGQIZHONGSHUIQIDENINGJIE,DAOZHIDUANMIANJIQIZHOUWEIJIEBING,SHIDUANMIANTIEHEBUYANYINQIXIELOU。TONGSHI,YINRUNHUAXINGCHA,DUANMIANMOCACHANSHENGDERELIANGJIAODUO,RUOBUNENGJISHIZHUANYI,BIRANHUIJIAJUDUANMIANCHUDEQIHUA,ZAOCHENGEXINGXUNHUAN,JIASUMIFENGMIANDEZAOQISHIXIAO。LINGWAI,DIWENMIFENGDEFUZHUMIFENGQUANZAIDIWENXIAFAYINGSHIDANYERONGYIDAOZHIXIELOU。


排列5缩水过滤工具 DUIDIWENMIFENG,CHULEXUANZEHESHIDEFUZHUMIFENGQUANCAIZHIWAI,HAIYAOZHUYIYIXIAJIDIAN。

 1.改进密封结构及正确选择摩擦副材料。实践证明,在静环表面开圆弧形凹槽可形成流体动力密封,增加流体膜承载能力,改善端面润滑条件,有效延长机封工作寿命。在端面配对方面,碳化钨一M106K石墨组对(即动、静环材料)一般要优于其他材料,因为其润滑性好,摩擦系数低,导热性也比较好。

 2.选择合适的端面比压。低温密封由于端面润滑性差,容易发生气化、结冰,所以在保证密封可靠的前提下,端面比压可适当减小。一般机械密封比压值推荐为0.29-0.59MPa,对低温密封可取其下限。对金属波纹管机械密封,由于动环没有轴向摩擦,端面比压甚至可以低于下限。

 3.工艺上采取相应措施。如尽量减少介质的含水量;保持密封腔压力的相对稳定;尽可能配备冲洗冷却装置;在设备启动前,对机封部位进行适当预热等。

 三、高速下的机械密封


排列5缩水过滤工具 DANGZHUANSUCHAOGUO3000r/minHUOZHEMOCAFUDEXIANSUDUCHAOGUO25m/sSHI,YIBANKESHIWEIGAOSUMIFENG。ZAIGAOSUTIAOJIANXIA,MOCADUANMIANYOUYUXIANSUDUHENDA,MOCACHANSHENGDERELIANGYEDUO,CISHIDUANMIANYEMOBURONGYIXINGCHENG,MOSUNJIAJU。GAOSUHAIRONGYIYINQIXUANZHUANHUANDEZHENDONG,BINGSHOUDAOJIAODADELIXINLIZUOYONG,BULIYUDUANMIANJIANYEMODEXINGCHENGHEWEICHI。SUOYIZAIGAOSUQINGKUANGXIA,WEILEJIANXIAOLIXINLIHEZHENDONGDEYINGXIANG,YINGJINLIANGJIANSHAOZHUANDONGBUJIAN,CAIYONGDANHUANGJINGZHISHIJIEGOU。YEKEYIJIAQIANGDUIMOCAFUDUANMIANDELENGQUEHERUNHUA。LINGWAIHAIKEXUANYONG[PV]ZHIGAODEMOCAFUCAILIAO,JIANXIAODUANMIANDEJIECHUKUANDU,HUOZHECAIYONGSHOUKONGMOJIXIEMIFENG。JINNIANLAI,YIZHONGMINGWEICHADONGHUANSHIDEJIXIEMIFENGYEZAIGAOSUSHEBEIZHONGDEDAOYINGYONG。YOUYUZAIYUANXIANDEDONGJINGHUANZHONGJIANJIARULEYIGECHADONGHUAN,KEYIJIANGMOCAFUXIANSUDUJIANGDIYIBAN,QUDELEBUCUODEXIAOGUO。


 四、高压下的机械密封


 JIXIEMIFENGGONGZUOYALICHAOGUO4-5MPaJISHUYUGAOYAMIFENGFANWEI。ZAIGAOYATIAOJIANXIA,YOUYUMIFENGDUANMIANBIYAZHIGUODA,YINQIDUANMIANFARE,CONGERPOHUAIYEMODEXINGCHENG,ZAOCHENGYICHANGMOSUN。GAOYAHAIKENENGSHIMOCAFUCHANSHENGBIANXINGHEPOLIE。GAOYAMIFENGYIBANJUNCAIYONGPINGHENGXINGJIEGOU,YISHIDUANMIANBIYACHUYUYIGEHESHIDEFANWEI。DANKAOLVDAOMIFENGDEKEKAOXING,PINGHENGXISHUBUKENENGWUXIANZHIZENGDA,YINERYOUXIEQINGKUANGJINGUANYIJINGCAIYONGLEPINGHENGXINGJIEGOU,DANDUANMIANBIYARENGKENENGJIAODA。(GONGZHONGHAO:BENGGUANJIA)DANKAOPINGHENGXINGJIEGOUHENNANMANZUSHIYONGYAOQIU,ZHEIZHONGQINGKUANGKECAIYONGDUODUANMIANJIFENGHUOZHESHOUKONGMOJIXIEMIFENG。


 五、腐蚀环境下的机械密封


 YOUXIEJIXIEMIFENGCHUYUFUSHIHUANJINGZHONG,ZHEISHIBUJINYAOZHUYIJIFENGZHONGMEIGELINGJIANBENSHENDENAIFUSHIXING,HAIYAOFANGZHITAMENZUHEZAIYIQISHIKENENGCHANSHENGDEDIANOUXIANXIANG。FUSHIHUANJINGZHONGDEJIXIEMIFENG,ZAIXUANYONGSHIYAOZHUYICAIYONGNAIFUSHIDECAILIAO。CIWAI,KEYICAIYONGWAIZHUANGSHIJIXIEMIFENG。DUIFUSHIXINGTEQIANGRONGYIYINQIANQUANSHIGUDE,KEYICAIYONGSHUANGDUANMIANMIFENG,YINRUGELIYEJIAYIBAOHU。


 六、颗粒介质下的机械密封


排列5缩水过滤工具 YOUXIEJIFENGKENENGZAIHANGUTIKELIDEJIEZHIZHONGGONGZUO,DANGGUTIKELIJINRUMOCADUANMIANSHI,RONGYICHANSHENGJULIEMOSUN,DAOZHIMIFENGDUANMIANHENKUAISHIXIAO。LINGWAIGUTIKELIKENENGHUISHIDONGHUANMIFENGQUANWUFAYANZHOUXIANGYIDONG,CONGERSHIDONGHUANWUFAFUDONG,SHIQUBUCHANGXING,DAOZHIJIFENGSHIXIAO。DUICIBIJIAOYOUXIAODEZUOFASHIJIARUYIGEWAICHONGXIZHUANGZHI。YOUYUYINRUMIFENGQIANGDECHONGXIYEYALIGAOYUMIFENGQIANGJIEZHIYALI,YINCIKEYIYOUXIAOZUZHIKELIJIEZHIJINRUMIFENGQIANG。CIWAIKEYICAIYONGSHUANGDUANMIANJIXIEMIFENG,ZAIMIFENGQIANGZHONGJIANJIARUFENGYE。HAIKEYICAIYONGWAIZHUANGSHIJIXIEMIFENG。


排列5缩水过滤工具 MUQIAN,JIXIEMIFENGZAILIANYOUHUAGONGZHUANGZHIDEJIDONGSHEBEIZHONGYIJINGCHENGWEIYIZHONGZUIPUBIANDEMIFENGXINGSHI,ERQIE,SUIZHEQISHEJIZHIZAOSHUIPINGDEBUDUANTIGAOYIJIXINCAILIAODEBUDUANKAIFA,QIYINGYONGFANWEIJIANGJINYIBUKUODA。


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关键词:侧搅拌机械密封,集装式机械密封,釜用机械密封

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