The inlet air temperature is ambient temperature; the outlet air temperature should not exceed 40°C.
According to international technical requirements, the ambient operating temperature of the generator is set at 40°C. All designs and wattages are based on this ambient temperature. For generators, ambient temperature is the inlet air temperature of the generator. Since the generator works with the diesel engine, the heat generated by the diesel engine will cause the entire space to exceed 40°C.
The ambient temperature of the generator during actual operation must not exceed 40°C. If the actual ambient temperature exceeds 40°C, the generator must operate at reduced power. For the ambient temperature, if it is lower than 40°C, the generator power may be higher than the rated power.
Detailed information:
1. Check that the internal combustion engine and the transmission part of the generator should be reliably connected, the output line wires should be well insulated, and all instruments should be complete and efficient.
2. After starting, it should run at low speed for 3-5 minutes. The operation can only be started after the oil temperature and pressure are normal. There should be no abnormal noise when the generator accelerates, the slip ring and commutator brushes should be in good contact, and there should be no jumps or sparks.
3. Before shutdown, you must first turn off the main switches of each power branch, gradually reduce the load, turn off the main power switch of the generator and return the excitation rheostat to the maximum resistance position forr reduce the voltage to the lowest value. Turn off the excitation switch and neutral point grounding switch to stop the internal combustion engine.
Baidu Encyclopedia - Generator Reverse Power
The generator is operating normally, but the case is hot to the touch.
(1) Failure Reasons
① The tractor has been overloaded for a long time, causing the generator to output high current for too long. There was a mass of iron in the circuit; , and the regulator was incorrectly adjusted, causing a prolonged overload of the generator; the platinum contacts of the cutter are sintered and cannot be opened in time. When the generator voltage is lower than the battery voltage, the battery voltage returns. in the generator, causing the generator to overheat or even burn out.
② When the excitation coil or armature coil is short-circuitedBetween turns, the output current capacity of the generator is reduced, while the electrical equipment operates as usual, resulting in a shortage of current and the temperature of the generator to rise sharply.
③The commutator surface is uneven or the carbon brushes are installed in the wrong direction when installed in the brush holder. Sparks are generated due to poor contact between the carbon brushes and the armature; the coil and collector are unsoldered, causing sparks at the desoldering point. All of the above will lead to overheating of the collector and a sharp increase in generator temperature.
④ During operation, the armature and the pole core collide for a long time, causing the generator to overheat due to friction.
(2) Troubleshooting methods
① Do not add electrical equipment to the tractor at will during thefunctioning ; if there is ground iron in the circuit, it must be stopped and cleaned to prevent the generator from overloading; energy production. The operating performance of the machine governor does not meet the requirements. You can check it with an instrument. Test and adjust.
② The short circuit between the turns of the excitation coil or armature coil must be repaired.
③If the carbon brush is installed in the wrong direction, it can be reinstalled so that the arc surface under the carbon brush matches the arc surface of the commutator; The armature coil and commutator are unsoldered and should be re-soldered securely and the short circuit fault should be checked and repaired.
④ Lubricate the generator bearings timely. If the bearing gap is too large or damaged, it must be replaced. If the armature shaft is deformed and bent, it can be removed and straightened; screwr the magnetic pole core, the pulley fixing screws and the generator. The machine bracket fixing screws are loose and need to be tightened to prevent the armature and the magnetic pole core from rubbing against each other for a long time and causing overheating.