• 化工泵电动机的控制系统日常维护保养检查有那些?
  • 本站编辑:振欣透平机械有限公司(原杭州振兴工业泵制造有限公司)发布日期:2019-07-25 11:00 浏览次数:pubd
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1、电动机的控制系统由开关、小变压器、保险丝、主副接触器、继电器、温度、压力感应装置等组成,相对较复杂。故障多种多样,常需要借助控制原理图分析排查。平时要注意保持控制箱内、外清洁干燥,不能有水、油污,定期用小扫风机吹干净箱内各元件及接线柱、排上的灰尘,或用刷子蘸电器清洁剂刷干净,以免影响接触器、继电器的工作或绝缘。设有烘潮电阻的控制箱,一般不要随意关掉加热开关。还应保持箱体接地可靠,预防触电。更换继电接触器时需要注意电磁线圈工作电压,以免换错烧坏线圈。一般有24V、110V和220V,对时间继电器,除了要注意线圈电压要求外,还要弄清时间继电器的时间调节单位(时、分、秒)及范围。


1。 The control system of motor is composed of switch, small transformer, fuse, main and auxiliary contactor, relay, temperature and pressure induction device, etc。 It is relatively complex。 There are many kinds of faults, so it is often necessary to analyze and check them by means of control schematic diagram。 At ordinary times, we should pay attention to keeping the inside and outside of the control box clean and dry。 There should be no water or oil pollution。 We should regularly use a small sweeper to blow out the dust on the components and wiring posts of the box, or dip the brush in the electrical cleaner to clean it, so as to avoid affecting the work or insulation of contactors and relays。 There is a control box with moisture resistance, generally do not turn off the heating switch at will。 The grounding reliability of the box body should also be maintained to prevent electric shock。 When replacing the relay contactor, attention should be paid to the working voltage of the electromagnetic coil, so as to avoid burning the coil by mistake。 Generally, there are 24V, 110V and 220V。 For time relay, besides the coil voltage requirement, the time regulation unit (time, minute, second) and range of time relay should be clarified。

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2、对采用星形-三角形(Y-△)方法启动的(转换延时约5秒)电动机,要察看其转换启动情况是否正常。通常,生产厂家对电动机的启动周期(即每分钟启动次数)有严格规定,会在起动控制箱上有警示标贴,提醒使用者防止电动机因频繁启动而损坏,同时,也为防止起动控制箱内的一些电器组件(如起动电抗器等)发热烧毁。所以,对起停频繁或电流大的电动机控制系统,应缩短检查保养周期。如:克令、锚机、绞缆机、主机辅助鼓风机、主空压机和锅炉水泵等都需密切注意,定期检查热过载继电器的保护功能(可拨动旁边的小红标色制),其设定动作值不要超过电动机铭牌的额定电流值,确保能起到过载保护的作用。


2. Star-triangle (Y-Delta) method is used to start (conversion delay is about 5 seconds) motors, to see whether the conversion start-up is normal. Usually, the manufacturer has strict regulations on the start-up cycle of the motor (i.e. the number of start-up times per minute). It will have warning labels on the start-up control box to remind users to prevent the motor from being damaged by frequent start-up. At the same time, it will also prevent some electrical components in the start-up control box (such as starting reactor) from burning out. Therefore, for the motor control system with frequent start-stop or large current, the inspection and maintenance period should be shortened. For example: Keling, anchor, winch, main auxiliary blower, main air compressor and boiler water pump should be paid close attention to, and the protection function of thermal overload relay should be checked regularly (small red mark color system can be moved next to it). Its setting action value should not exceed the rated current value of motor nameplate to ensure that it can play the role of overload protection.


3、要定期检查箱内接线和螺丝的紧固情况,防止接线和螺丝松脱。查看开关、接触器、继电器等组件有无损坏或烧蚀烧焦现象,各元件工作状态及起、停、连锁功能是否正常。要保持接触器动、静触头吸合、接触良好,避免因触头接触不好引起电动机缺相运行而烧坏。如果触头表面良好,仅是发黑,可用粗布擦一擦,不要轻易打磨掉表面的耐热合金层,否则将缩短触头寿命;若触头表面烧蚀比较严重,可用“0”号沙纸将其磨平。动、静触头需保持线接触或面接触,而不是点接触。接触情况好坏可在动、静触头之间放张纸条来检查,吸合时如夹不紧,说明触头或弹簧需要调整或换新)。


3. Inspect wiring and screw tightening regularly to prevent wiring and screw loosening. Check whether the switch, contactor, relay and other components are damaged or ablated, and whether the working status of each component and the functions of start, stop and interlock are normal. It is necessary to keep the contactor's dynamic and static contacts in good contact, so as to avoid burning due to the lack of phase operation of the motor due to poor contact between contacts. If the contact surface is good, only blackened, can be rubbed with coarse cloth, do not easily polish the surface of the heat-resistant alloy layer, otherwise it will shorten the life of the contact; if the surface of the contact is seriously ablated, it can be rubbed flat with "0" sandpaper. Dynamic and static contacts should be kept in line or surface contact, not point contact. Contact condition can be checked by placing a strip of paper between the static and dynamic contacts. If it is not clamped tightly during suction, it indicates that the contacts or springs need to be adjusted or renewed.


总之,只要各机、电人员加强责任心,切实按要求进行定期电机检查、电机维修和电机保养,并当发现设备的声音、温升、工作电流和绝缘等不正常时,又能及时处理,我们的电气管理水平就一定会上个新台阶,为船队的营运增加一份安全的保证。


In a word, as long as the mechanics and electricians strengthen their sense of responsibility, carry out periodic motor inspection, motor maintenance and motor maintenance according to the requirements, and when the sound, temperature rise, working current and insulation of the equipment are found to be abnormal, and can be handled in time, our electrical management level will surely go up to a new level for the operation of the fleet. Add a security guarantee.


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