沙坡頭機械密封使用時過熱會造成哪些影響？

　　沙坡頭機械密封按工作條件和介質性質的不同，有耐高溫、耐低溫沙坡頭機械密封

，耐高壓
、耐腐蝕沙坡頭機械密封
，耐顆粒介質沙坡頭機械密封和適應易汽化的輕質烴介質的沙坡頭機械密封等
，應根據不同的用處選取不同結構型式和材料的沙坡頭機械密封。

在zai一yi個ge或huo兩liang個ge端duan麵mian出chu現xian缺que口kou，這zhe種zhong現xian象xiang說shuo明ming兩liang個ge端duan麵mian分fen開kai的de距ju離li太tai大da
，而er當dang兩liang個ge端duan麵mian用yong力li合he緊jin時shi，就jiu會hui產chan生sheng缺que口kou。造zao成cheng端duan麵mian分fen離li的de常chang見jian原yuan因是進口沙坡頭機械密封jiezhijizhouzhengfa。liru

，shui，tebieshizaireshuixitonghuoshihanningjieshuideyetizhong，shuizhengfashipengzhang，yinerjiangliangduanmianfenkai。bengdeqixuexianxiangjiashangmifengjiandezusaiyekenengshishimifengduanmianchanshengquekoudeyuanyin。zaizhezhongqingkuangxia，bushiyouyuzhendonghelianzhouqibuduizheyinqide，yinweizhebuzuyishiduanmianchanshengquekou。jiangdiduanmianwendushifangzhijiezhijijuzhengfazaochengduanmiansunhuaidechangyongfangfa。tongshi，caiyongdaorexinghaodecailiaozuduiyeshiyoulide，ruyongniejiyingzhihejinyujintongshimozudui，ciwai，caiyongpinghengxing沙坡頭機械密封，或利用特種耐腐蝕沙坡頭機械密封壓蓋從外部注液冷卻，或直接冷卻腔內的密封
，等等
，對降低密封端麵的溫度是十分有效。
　　失效的沙坡頭機械密封，摩擦副端麵常會留下很細的徑向裂紋
，或者是徑向裂紋兼有水泡痕，甚至龜裂。這是由於密封過熱引起的，特別是陶瓷、硬質合金密封麵容易產生這類損傷。介質潤滑性差、過載、操作溫度高、線速度高
、peiduicailiaozuhebudangdeng，qizhongrenheyizhongyinsu
，huozheshijizhongyinsudediejia，doukeyichanshengguodademocare，ruomocarebunengjishisanfa，jiuhuichanshengranzhengjixiemifengreliewen，congerchuxianguodumosunhegaoxielou。jiejuemifengguorewenti，chugaibianduanmianmianjiwai，jianshaozaihewai
，haikecaiyongjingzhixingmifengbingjiadaoliutaoqiangzhilengquexunhuanliutidaoxiangmifengmian
，huozaimifengduanmianshangkailiutidonglicaolaijiayijiejue。mocaduanmianshangyouxuduoxixiaoderebandianhegulidebiansequ，zheshuomingmifengjianzaigaoyahereyingxiangxiabianxingniuqu。duiyuduanmiandederebianxing，yibandejisuanfangfashibuyunxude
，yingcaiyongyouxianyuanfajisuan，yibiangaijinmifenghuandesheji。