What's wrong with the overheating of excavator electromagnet? Repair method for overheated electromagnet of Kobelco sk330-8 excavator. Now let's look at the cause analysis and treatment methods!
Cause analysis:
1. Poor insulation of electromagnetic coil;
2. The power supply voltage is higher than the specified voltage, causing heating of the coil;
3. The electromagnetic core is not concentric with the axis of the slide valve;
4. Frequent commutation causes coil overheating;
5. Dry electromagnet enters oil and burns the coil;
6. The push rod is too long and the electromagnet stroke is not matched properly, and the electromagnet iron core cannot be pulled in, so that the current is too large and the coil overheats and burns out.
Treatment method:
1. Replace the electromagnet;
2. Check the power supply voltage and adjust it to the specified range;
3. Check and re weld;
4. Use wet DC electromagnet;
5. Trim the push rod;
6. Disassembly and reassembly;
7. Check and eliminate the oil leakage fault at the push rod or replace the sealing ring.
Knowledge supplement:
What is the reason for the oil leakage on the joint surface of the reversing valve of the plate connection of Kobelco sk330-8 excavator?
analysis:
1. The surface processing accuracy of the mounting base plate is poor;
2. The mounting screws are loosened;
3. The screw material does not meet the requirements, tensile deformation;
4. The bottom sealing ring is aging or does not work.
