The brush surface is dirty. The most overlooked thing about this is that the brushes of a normally operating diesel generator set are sealed in a sealed cabinet. There is a gear-shaped axial flow fan placed on the shaft between the bipolar brushes. The rotor rotates to remove the brushes. Graphite carbon powder crushed and the heat generated by the electric brush is removed in time to achieve the cleaning and cooling effect. If the cabinet door is not closed tightly or you forget to close the door when inspecting, the dust from outside will be sucked into the brush with the hot air and stick to the column of the cabinet. brush, which will affect the heat dissipation of the cabinet. brush on the one hand. On the other hand, when sparks occur in the brushes of a diesel generator set, the surface of the brush columns is dirty and the insulation resistance between the brush columns is insufficient.health and it is easy to catch fire. Additionally, there are spiral grooves on the slip ring. This can increase the heat dissipation area of the brush and improve the contact with the brush, so that the brush can be cooled more completely and the toner can be removed more easily. . If the cabinet door is not closed tightly and the fan power is insufficient, dust from outside can easily adhere to the spiral groove, and the consequences can be imagined. The exciter brushes are exposed to the exterior due to their relatively low voltage level. It is also recommended to inspect and clean them regularly.
The bearing vibrates a lot. The large shafts of the first and second phases are equipped with exciters. Since bearings are long and have a lot of additional equipment, it is naturally difficult to contkeep vibrations to a minimum. When the unit operates for a long time, complex factors such as fatigue and aging cause the bearing vibration to increase. The vibration of the brush will cause uneven friction of the brush column, loose cables and springs, and local sparks will gradually affect the whole. situation.
Brush pressure is uneven or does not meet requirements. When the brush leaves the factory, the manufacturer has relevant regulations: the brush pressure is adjusted to the minimum pressure that does not cause sparking. After scientific demonstration and practical summary, the minimum pressure is generally 200 ~ 300 ɡ/c㎡, ie. 0.02 ~ 0.03 MPa. Every brush must be. The pressure between them should also be uniform and the difference should not exceed 10. During long-term operation of the generator, if the friction of oneSome brush is too short or if the brush is stuck in the brush frame, the pressure will be uneven. Additionally, due to factors such as mechanical and spring softening due to heat, the pressure cannot reach the minimum theoretical requirement for the brush not to spark. In addition, when we compress and pull the carbon brushes, we sometimes rely on feeling and lack of experience, so the operation error is very large.
Manual chain pan
Other reasons include poor brush manufacturing process, poor grinding, incorrect brush position, uneven gaps, excessive contact resistance , high load, short circuit, etc. this may be so, but production practice in recent years shows that the above reasons are mainly the reason.
1. First of all, you need to prepare the disassembly tools, cas shown in the figure below.
2. Next, you need to find the two screw holes on the hair dryer handle as shown in the picture below.
3. Then remove the two screws from the handle and gently open it as shown in the picture.
4. Next, you need to remove the place where the power cord is connected as shown in the image below.
5. Then you need to hold the two thin objects on the back with one hand and two fingers, and open the cover on the back of the hair dryer as shown in the picture.
6. Next, use pliers to remove the generator from the hair dryer, as shown in the image below.
7. Then remove the layer of foil on the outside of the generator as shown in the picture below.
8. Finally, the hair dryer is disassembled, as shown in the picture below.