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购买和使用发电机,应当符合铭牌上的技术要求,如电压,功率和额定输出电流等。例如用于丰收—27型拖拉机,东方红—40型拖拉机等,常用150瓦发电机,额定输出电流为13安;用于铁牛—55型拖拉机常用220瓦发电机,额定输出电流为18安。
2、用于拖拉机上的发电机通常为并激式,也就是说发电机激磁线圈是并联的,所以,总要有一端通过机壳与电枢线圈是并联的,所以,总要有一端通过机壳与电枢线圈相接。若激磁线圈在发电机内通过机壳与电枢线圈相接叫内搭铁(图5—1),即叫“内搭铁发电机”;若激磁线圈在发电机外通过调节器搭铁(图5—2),即叫“外搭铁发电机”。国产拖拉机目前使用的直流发电机均为内搭铁。在接线时,一定要将激磁线圈的引出线与搭铁的碳刷架相接,激磁线圈便无电流通过,发电机不会发电。另外有些进口的拖拉机上使用外搭铁发电机,如果改为内搭铁发电机,只要调换发电机激磁线圈抽头接线即可。
3、发电机壳上两个接线柱,一般均有“电枢”“磁场”字样注明。如文字标注不清,可用下述方法识别。
1)电枢接线柱:直径较粗;是接在绝缘的刷架上。
2)磁场接线柱:直径较细;磁场线圈一个端头就按在上面。
4、在拖拉机上的发电机是由发动机带动的,所以转动方向是一定的,在检修时若将发电机反向旋转就不发电,这是因为正转时电枢线圈在磁场的作用下感应出的电流经调节器与激磁线圈相通。激磁线圈通电后的磁场方向与铁芯剩磁方向相同,因而磁场不断增强,电压迅速升高。反转时电流方向与正转时相反,使激磁线圈通电后的磁场方向与铁芯剩磁方向相反,磁场越来越弱,使发电机不能发电 Xiamen generator recycling, the acquisition of the factory in Xiamen old generator sets, generator sets, Xiamen Tel 13606035861 Xiamen Xin water recycling old equipment is a comprehensive recycling of old equipment recycling company. Main business. Tangshan generating recovery. Tangshan recycling the old generator. Tangshan used generating recovery. Tangshan recycling old generators, major acquisitions Mitsubishi diesel generator, diesel generator Weichai recovery, recovery on diesel diesel generator, diesel generator Paou recycling, recovery of low noise diesel generator, diesel generator without moving recovery , Jinan Diesel diesel generator recovery, recycling Steyr diesel generator,
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Purchase and use of generators should meet the technical requirements of the nameplate, such as voltage, power and rated output current. For example, tractors used to harvest -27, -40 DFH tractor, commonly used 150-watt generator, rated output current is 13 A; used tractor used tractor -55 220 watt generator, rated output current of 18 safety .
2, for the tractor and the generator is usually excited, that generator excitation coils are parallel, so there must be one end of the armature through the coil is parallel with the chassis, so there must be at one end by phase with the armature coil chassis. If the excitation coil in the generator phase armature coils through cabinet and called the Ground (Figure 5-1), which is called "Ground within the generator"; if outside the excitation coil in the generator grounding through the regulator ( Figure 5-2), which is called "Ground outside the generator." China-made tractors are currently in use within the Ground DC generator. In the wiring,
Sure to Lead the coil excitation and Ground of the carbon brush phase, the excitation will be no current through the coil, the generator will not generate electricity. Others use the external imported tractors Ground generator, if the generator to the Ground, as long as the exchange generator excitation coil can tap connections.
3, the generator shell on the two terminal, the general had "armature", "magnetic" words specified. Such as text label is unclear, the following methods to identify available.
1) Armature Posts: diameter thick; is connected to the insulated brush holder.
2) the magnetic field terminals: small diameter; a magnetic coil ends to press on it.
4, the generator on a tractor driven by the engine, so the rotation direction is certain, in maintenance If reverse rotation is not generating electricity, this is because when the armature coil is transferred under the effect of magnetic field induction out of the current regulator and excitation coil by the similarities. Excitation coils and the core after the remanent magnetic field direction in the same direction, thus growing the magnetic field, the voltage rapidly increased. Reverse when the current in the reverse direction and forward, so that after the excitation coils and the core remanent magnetic field direction in the opposite direction, the magnetic field become weaker, so that generators can not generate