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武汉履带吊出租欧洲杯外围 > 吊车百科 > 吊车起重机保护系统之零位保护,过载保护,超速保护​
吊车起重机保护系统之零位保护,过载保护,超速保护​
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欧洲杯外围HUBEIWUHANLVDAIDIAOCHUZUGONGSI

时间 : 2019-11-18 08:31 浏览量 : 48

吊车起重机保护系统之零位保护过载保护,超速保护

起重机保护系统之零位保护

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欧洲杯外围        DANGDIANDONGJICAIYONGZHULINGKONGZHIQIHUOJIECHUPING(KONGZHIPING)KONGZHISHI,YIBANBAZHULINGKONGZHIQIDELINGWEICHUTOUCHUANRULINGWEIJIDIANQIDEKONGZHIHUILUZHONG,SHIXIANLINGWEIBAOHU。ZHULINGKONGZHIQIDESHOUBINGBUZAILINGWEISHI,LINGWEICHUTOUCHUYUDUANKAIZHUANGTAI,LINGWEIJIDIANQIXIANQUANHUILUDUANDIAN,KONGZHIDIANDONGJICHUYUDUANDIANZHUANGTAI,ERCISHIZONGDIANYUANKEYIJIETONG,DANLINGWEIJIDIANQIRENGCHUYUTINGZHIZHUANGTAI,DIANDONGJIBUNENGQIDONG。

吊车起重机保护系统

起重机保护系统之过载保护

    起重机上的电动机额定功率大于1KW时,均应设置单独的过载保护。过载保护的方式较多,一般采用过电流继电器或带热脱扣器的断路器;对于容量较大的采用内装热元件的过载保护方式。如图1.6-5(a)(b)所示,为常见的电动机过载保护器机器电路图。

    GUODIANLIUBAOHUSHIMUQIANQIZHONGJIPUBIANCAIYONGDEDIANDONGJIGUOZAIBAOHUFANGSHI。YIBANJIANGGUODIANLIUJIDIANQIXIANQUANJIERUDIANDONGJIZHUHUILUZHONG,LIANSUOCHUDIANJIERUZONGDIANYUANDEANQUANLIANSUOHUILUZHONGHUOLINGWEIJIDIANQIXIANQUANKONGZHIHUILUZHONG。GUODIANLIUSHI,DUANKAIZONGDIANYUANHUOZHEJIGOUDIANDONGJIKONGZHIDIANYUAN,SHIDIANDONGJITINGZHIGONGZUO。

    CHANGJIANDEGUOZAIBAOHUZHUANGZHIZHUYAOCONGDINGSHIXIANHEFANSHIXIANLIANGFANGMIANRUSHOU:

DINGSHIXIAN:FUZAIGUODIANLIUQIECHIXUGUOLIUSHIJIANDADAOGUOLIUSHIJIANSHEDINGZHI,GUOZAIBAOHUQIZIDONGTUOKOU,5FENZHONGHOUNENGZIDONGFUWEI。TUOKOUHOUGUOZAIBAOHUQIXIANSHIZUIDAXIANGDEDIANLIUDAI9?SIYANBENLAIGUSHENDUAN︼.2~30S,GUOLIUSHIJIANZHONGFUXINGWUCHA±5%,GUOLIUSHIJIANZHENGDINGWUCHA±10%。

欧洲杯外围FANSHIXIAN:FUZAIGUODIANLIUQIECHIXUSHIJIANDADAOYOUTUOKOUJIBIEXUANZEDE1~4JIQUXIANZHONGMOUYIQUXIANJIFUZAIDIANLIUYUDIANLIUZHENGDINGZHIZHIBIZHISUOGUIDINGDESHIJIANSHI,GUOZAIBAOHUQIZIDONGTUOKOU,5FENZHONGHOUZIDONGFUWEI。TUOKOUHOUGUOZAIBAOHUQIXIANSHIZUIDAXIANGDEDIANLIUZHI。


起重机保护系统之超速保护

    起重机起升机构和变幅机构调速时,机构的支持制动器欧洲杯外围是全打开的,不起制动作用。此时,作用在电动机轴上的力矩有两个,一个是由重物产生的负载力矩,一个是由调速系统决定的调速力矩。一般情况下,调速力矩为制动力矩,改变调速力矩的大小来实现调速。采用可控硅定子调压、可控硅供电、直流机组调整时,电动机轴上的调速力矩是由该可控供电电源决定的。可控调速电源可能因可控硅触发失效等原因造成供电电源不能正常输出电压、造成电压消失或较小,此时,作用在电动机轴上的力矩只有一个负载力矩,电动机处于失控状态,从而发生重物坠落事故。

欧洲杯外围    CAIYONGWOLIUZHIDONGQI、NENGHAOZHIDONG、DIANCILIHEQIDIAOSUSHI,ZUOYONGZAIDIANDONGJIZHOUSHANGDELIJUTONGYANGYOULIANGGE,YIGESHIZHONGWUCHANSHENGDEXIAJIANGFUZAILIJU,YIGESHIDIAOSUXITONGJICHUDEDIAOSULIJU。YOUYUKONGZHIXINHAOGUZHANGDENGDENGYUANYINZAOCHENGDIAOSULIJUXIAOSHIHUOJIAORUOSHI,TONGYANGYEHUIFASHENGZHONGWUZHUILUOSHIGU。QIZHONGJICHANGYONGDECHAOSUBAOHUQIJIQIDIANLURUTU1.6-6(a)(b)SUOSHI。

    WEICI,SHANGSHUYOUYUDIAOSUKENENGZAOCHENGCHAOSU,DIAOSUXITONGYIBANJUNYINGSHEZHICHAOSUBAOHUHUANJIEHECUOSHI。RUANZHUANGWEIZHIYUNXU,DOUYINGSHEZHICHAOSUBAOHUKAIGUAN。KAIGUANDONGZUOSHI,DIANDONGJITINGZHIYUNXING,ZAIMOUXIEQINGKUANGXIAYEKEYICAIYONGQIANDIANLIUJIDIANQIZUOWEICHAOSUBAOHUZHUANGZHI。


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