ZKTD系列矿井低速大型直流电动机

一概述上海电机厂60年代初已开始制造矿井提升机用大型直流电动机自1962年生产第一台720千瓦58转/分大型直流电动机至今已生产了百余台大型矿井提升直流电机1978年起结合引进技术并开发了低速悬挂式矿井提升直流电动机该类电机由于设备占地面积小投资费用省传动效率高维护方便改善运行环境达到了技术经济上更为完善的目的上海电机厂经过数十年的生产实践对矿井提升低速大型直流电动机设计制造积累了丰富的经验通过不断研究改进最新建立了72XTD系列矿井提升低速大型直流电动机使电动机性能更加优良结构合理质量可靠三产品性能1本系列电动机的定额为连续工作方式2电动机的励磁方式为他动励磁绕组有四个引线端子分为两组两组串联电压为110V 并联时励磁电压为55伏电动机容许强行励磁强动电压不得超过500伏3当采用磁场向进行逆运行时磁场电流从正向额定值至负向额定值时间为0.8秒4电蹈许电流变化率(di/dt)为200300倍额定电流/秒5电机容许的短时最大过载能力为2倍额定电流持续时间60秒切断电流为2.25倍额定电流6电动机容许双方向运转7.电动机适用于直流电机组电源供电和静止电源供电当电动机采用静止电源供电时整流器的脉波数应不大于6在额定基速额定电压和额定负载下的相控总量不大于15供电电源的峰值纹波因数不得超过6四.结构特点1本系列电动机的定转子铁芯分别采用优质钢板和硅钢片叠压而成适用于可控硅系统的供电方式2电动机绝缘等级为F级电机采用无溶剂真空压力浸泽处理VPI,使绕组绝缘具有良好的抗潮能力机械强度和导热性能3本系列电动机有两种结构型式一种为有轴和轴承座另一种为无轴无轴承座直接悬挂在提升主轴上后一种称悬挂式电机它与提升机主轴的连接方式又三种(a)轴套过盈连接液压装卸(b)夹板式配合螺栓连接(c)夹板式高强度螺栓摩擦连接4本系列电动机的转子槽为斜槽使电动机在整个运行转速范围内确保平稳运行并有效防止磁噪音5电机定子绕组内埋置测温元件pt100共四件主机绕组和换向绕组各二件6当电机制成带轴带轴承时其轴承采用卧式复合润滑滑动轴承轴承上带有电接点测温装置或铂电阻测温元件pt100轴承供油系统和装置一般由用户自备7悬挂式结构电机电机定子为可移式能从轴向位置移出露出电枢部分便于维修8电机防护等级有IP01和IP44二种通常采用换向器外露的IP01型式电机的冷却方法为IC37电机的安装型式为IM5710,IM7321l. IntroductionShanghai Electrical Machinery Mfg. Works(abb.as SEMMW)began to produce the large-size D-C motors for mine hoists in early 1960s.Beginning with the first large motor rated at 720 kW at 58 r/min. we have produced more than 1 00 pieces of such large-size units for coal mine hoists .In 1978. We still developed low-speed D-C motors of overhanging type construction based on the transferred technology .Motors of this type hit a more perfect goal in technical and economical aspects .resulting in smaller mounting space required; lower initial capital .higher operating efficiency .easier maintainance and better application surrounding.SEMMW have got abundant experlences in designing and processing the large-size. low-speed D-C motors for mine hoists .after tens of years on production practice .The large D-C .motors of series ZKTD are of The newest model with performance better. structure more reasonable and service more reliable, resulting from uninterrupted reseach and reform.3.Motor performances(1)The duty cycle of the motors is continuous(SI).(2)External excitation is used for all motors. four terminals from the exciation winding are arailable for either series connection(110V).or parallel connection(55V). Forced excition is permitted with ceiling voltage not over 500V.(3)The time taken by the excitation current changing from its rated in one direction to its rated in reversed divection is 0.8 sec. when reversed direction of operation is required thro. the reversal of excitation.(4)The permitted variation rate of motor current. di/dt. is within the range of 200-300 amp/sec.(5)The permitted instant maximum overload capacity of motor is two times rated current with sustained time of 60 sec. the tripping current is 2.25 times the rated. (8)Motors could operate in both direction of rotation.(7)Motors could be energized on either motor-generator set or static rectifier source. while motors are used in later case. the number of pulses should not be less than 6.with the peak ripple wave factor being not over 15% under conditions of rated basicspeed .rated voltage and rated load.4.strueture Features(1)The stator and rotor cores of this serial motor are piled up and pressed by means of laminations made of high grade plate steel and silicon sheet steel respectively hence suitable for energizing on siliconcontrolled rectfier system.(2)The inulation of the motor windings is of F class. subject to vacuum and pressure impregnating(VPI) treatment with solventless varnish .that gives insulation high moisture resistance., high mechanical strength and good heat conductance.(3)This serial motor has two types in structure' one with a shaft and two bearing pedestals. another without shaft and bearing pedestals but direct hanging over the shaft of the hoist. In the later case., the motor is said to be of overhanged type. and the methods of connection between nlotor and hoist are Three as follows.(a)using conical bushing for interferencefit connection. either assembled or disassembled by means of pressurized oil.(b)using clamp plates with fitted bolts connection.(c)using clamp plates with high-strength boll friction connection.(4)The armature slots of this serial motor are skewed in order to make the motor. smoothly operating within its speed range and to prevent effectively the motor from noisy operation(5)There are 4 resistance thermometers sptl00 embedded in the stator wihdings (both main pole and commutating pole windings having Two pcs each).(6)In the case of motor with shaft and bearing pedestals. the bearings are of slide type with compound lubrication and with electric contact type temperature device or platnum resistance type pt100.Temperature element.(oil supoly system and equipment for bearings are left for the user) .(7)In the case of overhanged type .the motor stator could be moved along axial direction so as to make the armature end protion fo be accessible for repairing. (8).The protection degree: IPOI or IP44 for motor. but IP01 for commutator as usual. the cooling method of motor is IC37.and the installation is IM5710 or IM7321.ZKTD 矿井提升低速大型直流电动机系列型谱规格表表列电机规格作为优先选用规格并与制造厂协商表中符号说明The symbols used in the sheet have the meaning as follow:P电动机额定功率kW P motorrated output (kW)N电动机额定转速r/min N motorrated speed (r/min)U N电动机额定电压V U N motor rated voltage (V)提升机用悬挂式结构大型直流电动机外型和安装尺寸The outline and mounting dimensions of the large-sizeD-C motor with overhanged strure form mine hoist型号功率(千瓦)转速(转/分)L1L2L3L4B H h1h2 ZKTD215/40~63800~125036~75790~10205803102850~331043************ ZKTD250/40~711250~200042~85950~12606502003040~366043808004501930 ZKTD285/45~752000~280038~851040~13407002003280~388049708504502130 ZKTD315/45~802500~315038~751050~14007502003450~415055009004502280 ZKTD350/40~753150~400038~85注有轴和轴承座电机外型安装尺寸用户选用时另定The outline and mounting dimentions of D-C motor with shaft and bearings can be settled on codering.。