EMERSON A6740

EMERSON A6740

 

   电机作为一种用电设备，在社会中已广泛应用，无论是工业还是农业，都可以看到电机的身影，如何对电机进行保养，可是一门技术活。节能节电节能环保。

    电机的保养流程为：清洗定转子--更换碳刷或其他零部件--真空F级压力浸漆--烘干--校动平衡。

如何对电机进行保养。当电动机的热保护连续发生动作时，应查明故障来自电动机还是超负荷或保护装置整定值太低，消除故障后，方可投入运行。使用环境应经常保持干燥，电动机表面应保持清洁，进风口不应受尘土、纤维等阻碍。

    当轴承的寿命终了时，电动机运行的振动及噪声将明显增大，检查轴承的径向游隙达到下列值时，即应更换轴承。拆卸电动机时，从轴伸端或非伸端取出转子都可以。如果没有必要卸下风扇，还是从非轴伸端取出转子较为便利，从定子中抽出转子时，应防止损坏定子绕组或绝缘。

应保证电动机在运行过程中良好的润滑。一般的电动机运行5000小时左右，即应补充或更换润滑脂，运行中发现轴承过热或润滑变质时，液压及时换润滑脂。更换润滑脂时，应清除旧的润滑油，并有汽油洗净轴承及轴承盖的油槽，然后将ZL-3锂基脂填充轴承内外圈之间的空腔的1/2(对2极)及2/3(对4、6、8极)。

   电动机是工厂用得最多的设备，电动机的容量应合理选择。要避免用大功率电动机去拖动小功率设备（俗称大马拉小车）的不合理用电情况，要使电动机工作在高效率的范围内。当电动机的负载经常低于额定负载的40%时，要合理更换，以避免电动机经常处于轻载状态运行，或把正常运行时规定作△接法的电动机改为Y接法，以提高电动机的效率和功率因素。对工作过程中经常出现空载状态的电气设备（例如拖动机床的电动机、电焊机等），可安装空载自动断电装置，以避免空载损耗。

    2．更新用电设备，选用节能型新产品

    目前，我国工矿企业中有很多设备（如变压器、电动机、风机、水泵等）的效率低，耗电多，对这些设备进行更新，换上节能型机电产品，对提高生产和降低产品的电力消耗具有很重要的作用。

    3．提高功率因数

    工矿企业在合理使用变压器、电动机等设备的基础上，还可装设无功补偿设备，以提高功率因数。企业内部的无功补偿设备应装在负载侧，例如在负载侧装设电容器、同步补偿器等，可减小电网中的无功电流，从而降低线路损耗。所谓两部制电价，就是把电价分成两个部分，其一是基本电价，其二是电度电费。基本电价是根据用户的变压器容量或最大需用量来计算，是固定的费用，与用户每月实际取用的电度数无关。电度电费则是按用户每月实际取用的电度数来计算，是变动的费用。这两部分电费的总和即为用户全月应付的全部电费，实行两部制电价可以促进用户提高负荷率和设备利用率。如果用户的负荷率较低，而变压器的容量又过大，则用户支付的基本电费就较高，反之就较低。在用户按不同类别计算出当月全部电费时，按照电力部门的规定，若功率因数高，则可减免部分电费，反之则增收部分电费。

    4．推广和应用新技术，降低产品电耗定额

    例如，采用远红外加热技术，可使被加热物体所吸收的能量大大增加，使物体升温快，加热效率高，节电效果好，耐火纤维材料配合使用，节电效果更佳。在工矿企业中有许多设备需要使用直流电源，如同步电机的励磁电源，化工、冶金行业中的电解、电镀电源，市政交通电车的直流电源等。以前这些直流电源大多是采用汞弧整流器或交流电动机拖动直流发电机发电，它们的整流效率低，若改用硅整流器或晶闸管整流装置，则效率可大为提高，节电效果甚为显著。此外，采用节能型照明灯，在大电流的交流接触上安装节电消声器（即直流无声运行），加强用电管理和做好节约用电的宣传工作等，也都是节约用电的重要措施

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FAO42016 AO42016

FDI-115-16 DI11516

TE-02

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TE-09 TEF09-5