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  叶轮给(ji)料(liao)机频(pin)发性(xing)故障及分析(刚性(xing)叶轮给(ji)料(liao)机)

  1、动力(li)电源易缺相、断相

  叶轮给料(liao)机(ji)供电(dian)(dian)(dian)方式(shi)是(shi)滑(hua)(hua)触线(xian)，其动(dong)力电(dian)(dian)(dian)源是(shi)利用电(dian)(dian)(dian)器从滑(hua)(hua)触线(xian)上取得。因滑(hua)(hua)触线(xian)导线(xian)裸(luo)露，受环(huan)境影(ying)响(粉尘、潮湿)大，加之行车(che)轨道(dao)变(bian)形等(deng)因素(su)，导致电(dian)(dian)(dian)器刷与滑(hua)(hua)触线(xian)接触不良，而且电(dian)(dian)(dian)器易脱(tuo)落，造成给煤机(ji)动(dong)力电(dian)(dian)(dian)源缺相、断相，多(duo)次发生拖动(dong)电(dian)(dian)(dian)机(ji)烧坏的事故。

  2、调速(su)不可靠

  该(gai)滑差电(dian)(dian)(dian)动机(ji)(ji)离合器的励磁电(dian)(dian)(dian)源，采用可控硅整流电(dian)(dian)(dian)源供(gong)电(dian)(dian)(dian)，使(shi)之实现宽幅无级调速。为了提高(gao)滑差电(dian)(dian)(dian)机(ji)(ji)的抗干扰(rao)性能，在可控硅控制回路中采用速度负反馈(kui)及电(dian)(dian)(dian)压(ya)微(wei)分负反馈(kui)电(dian)(dian)(dian)路的反馈(kui)系统。同(tong)样因(yin)为粉尘污染较大(da)，煤(mei)尘从接线盒进入测速发(fa)(fa)电(dian)(dian)(dian)机(ji)(ji)，造(zao)成测速反馈(kui)电(dian)(dian)(dian)路的反馈(kui)信号失真，从而直接影响(xiang)了调速的准确性和可靠性，给(ji)运行(xing)人员控制给(ji)煤(mei)量(liang)带来很大(da)的困难，同(tong)时(shi)也(ye)对配煤(mei)质量(liang)造(zao)成影响(xiang)。此外，还(hai)经常发(fa)(fa)生测速发(fa)(fa)电(dian)(dian)(dian)机(ji)(ji)因(yin)被(bei)煤(mei)粉卡死而烧(shao)坏(huai)事故。

  3、滑差电机轴承损坏

  滑差(cha)(cha)电(dian)机由拖动(dong)电(dian)机(交(jiao)流三相异步电(dian)动(dong)机)、无滑环(huan)滑差(cha)(cha)离(li)合(he)(he)器和测速发电(dian)机组成(cheng)，测速发电(dian)机与(yu)滑差(cha)(cha)离(li)合(he)(he)器输出轴共轴。由于(yu)缝隙煤(mei)槽(cao)处(chu)(俗称(cheng)地沟)工作环(huan)境差(cha)(cha)，粉尘(chen)污染较大，加之滑差(cha)(cha)电(dian)机外壳(qiao)为鼠笼状，未密(mi)封，煤(mei)尘(chen)直(zhi)接从鼠笼的缝隙进入滑差(cha)(cha)离(li)合(he)(he)器内，经常造成(cheng)轴承卡死甚至(zhi)损坏。