The following reasons can be considered for the high temperature of the generator:
1. Poor ventilation system and severe blockage of vents;
2. Overload and excessive current causing. the temperature increases;
3. The winding insulation is not qualified and the overall insulation level is reduced;
4. The bearing is damaged or lack of oil, etc.
What is the reasonable range for engine heating? How to solve engine heating problem?
1. Unit load size. It has an impact, but not absolutely. The greater the load, the more steam must be condensed for heat exchange. If the cooling effect is not very good, the exhaust pressure will increase and the temperature will rise.
2. The heat exchange effect of the condenser: If there is scale or the air in the water chamber on the cooling water side of the condenser is not exhausted, the ref effectcooling will be affected. Poor cooling effect --- high exhaust temperature.
3. The circulating water temperature is abnormal. Of course, if the temperature is high, the cooling effect is poor. The exhaust gas temperature will increase.
4. The air extractor is abnormal. When the condenser is operating, there is still non-condensable spent steam that must be continually pumped out. If the condenser operates abnormally, the waste steam cannot be extracted normally, the vacuum will not be maintained, and the exhaust pressure and temperature will increase. Generally, as the exhaust gas pressure increases, the exhaust gas temperature also increases.
Hello, generally the engine should not exceed 60 degrees. The extent to which the motor is allowed to generate heat depends primarily on the level of internal insulation of the motor. The performance of theInternal insulation will only be destroyed at high temperatures (above 130 degrees). Therefore, as long as the internal temperature does not exceed 130 degrees, the motor will not be damaged, and the surface temperature will be lower than 90 degrees at that time. Therefore, it is normal for the surface temperature of the stepper motor to be between 70 and 80 degrees. A simple method of measuring temperature is to use a thermometer, and you can also make a rough judgment: you can touch it with your hand for more than 1-2 seconds, and it does not exceed 60 degrees, you can only touch only once; your hand, and it's about 70-80 degrees; you can drop a few drops of water to cool it down quickly, it's above 90 degrees. \x0d\\x0d\There are many reasons why the motor heats up when running, including workload, bearing operation, etc.gear, cooling or climatic conditions, etc. The problem can only be solved by finding the cause. are the reasons why the motor heats up: \x0d\(1) The load is abnormal\x0d\The motor runs according to the specified conditions. Data such as voltage, current, power factor and speed are different from the values indicated on the nameplate. \x0d\Too high voltage will increase iron loss, which will not only increase the temperature increase of the iron core, but also affect the temperature increase of the stator winding. If the current is too large, the steel consumption of the winding will increase, directly causing the winding to overheat. In the same way, if the excitation current increases, it will also affect the increase in rotor winding temperature. \x0d\The degree of unbalanced load is also specified for syn generatorsthree-phase chronos. When the negative pitch is unbalanced, a reverse rotating magnetic field is generated, which causes significant additional rotor losses and increases rotor heating. \x0d\(2) Insufficient engine ventilation\x0d\The increase in engine temperature has a strong relationship with ventilation conditions. When ventilation is insufficient, the increase in engine temperature will increase. The main reason for insufficient ventilation is that the air duct is blocked, such as the motor air gap, radial air duct, air filter and air inlet are blocked by dust, lint , etc. If the temperature rise of a newly commissioned motor is too great, the design of the motor itself is unreasonable, resulting in insufficient air volume. \x0d\(3) Accumulation of dust in the machine\x0d\ When the engine is in a place offering safe working conditionsOnnable, flying dust and other objects get inside the engine and accumulate on the hot surface, making it difficult for the engine to operate. to dissipate heat and cause an increase in temperature. This situation is more common in textile factories, flour mills, paper mills, cement factories and sawmills. \x0d\(4) The inlet air resistance is too high\x0d\If you find any abnormalities in the temperature of the motor stator, rotor winding or stator core, you can check the following aspects. (1) First check whether the load state of the motor is normal, for example: whether the three-phase current and voltage values are within the rated value, whether the three-phase negative weight is balanced, whether the current excitation exceeds the normal value, etc. If the load is found to be abnormal, try adjusting the load; If the excitation current is too large, try to reduce it. If it is notstill not valid after adjustment, the possibility of a short circuit between turns of the rotor winding should be considered. (2) If the motor operates within the normal range, but the temperature increase of the stator and rotor windings and stator core has exceeded the normal value, it means that there is an abnormality in the motor itself or in the ventilation and cooling system. to this, and the cause must be found and corrected. (3) Check the inlet and outlet air temperature for motors with leaky ventilation such as protective ventilation and duct ventilation, if the inlet air temperature is normal but the outlet air temperature is higher than the normal value, the air duct may. be blocked and the air duct must be inspected. Check that it is clean. For motors cooled by ventilation in a closed cycle, the risk of blockage of the air ducts islesser. If the inlet air temperature is too high, it means the chiller is faulty or the cooling water flow is insufficient, and the chiller should be inspected. When checking the condition of the air duct. Pay attention to whether the air inlet and outlet are adjacent and whether there is backflow. (4) Check whether the bearing is loose and there is a friction noise. Because the friction between the stator and the rotor will also increase the temperature. (5) If the temperature rise of the stator and rotor is still high after the above inspection and treatment, you can determine whether there are any defects in the insulation. If necessary, additional insulation treatment should be carried out on the motor \x0d\. The stator of large motors is generally equipped with a temperature measuring device. A mercury thermometer or resistance thermometer is installed at the air inlet and outlet, it ist therefore easier to detect overheating. For small and medium-sized motors, there is usually no temperature measuring device, and the operator must check it with his hands. If his hands burn, he can measure more with an instrument. There are many reasons why the engine heats up. If the above conditions do not occur but the temperature continues to rise, then you should ask a professional to repair it. I hope the above experience will be useful to you.