There is no fixed value for the temperature of the generator bearing shell, as it is influenced by various factors such as the model, specifications, operating environment, and load conditions of the generator. However, based on information from multiple sources, we can summarize a general scope and precautions.

　　1. Normal range of generator bearing temperature

　　Generally speaking, the normal temperature range for the generator bearing shell is between 60 ℃ and 80 ℃. This range is determined based on the normal operating conditions and design parameters of the generator, aiming to ensure that the bearing can effectively dissipate heat and withstand necessary mechanical loads during operation.

　　2. Temperature that cannot be exceeded

　　Although the normal temperature range is between 60 ℃ and 80 ℃, the specific temperature limit should not exceed a certain degree, which needs to be determined based on the specific specifications of the generator and the manufacturer's recommendations. However, it can be inferred from information from multiple sources that the temperature of the generator bearing should generally not exceed 85 ℃, due to safety considerations and the need to prevent equipment damage.

　　3. Influencing factors

　　The temperature of the generator bearing is affected by various factors, including but not limited to the following:

　　Load variation: The heavier the load, the greater the mechanical loss of the generator, and the temperature of the bearing will also increase accordingly.

　　The quality and efficiency of the lubrication system have a significant impact on the temperature of the bearing shell. Good lubrication can reduce friction and wear, thereby lowering the temperature of the bearing shell.

　　Environmental temperature: The higher the environmental temperature, the higher the temperature of the bearing.

　　Rotor weight: The larger the weight of the rotor, the greater the pressure that the bearing shell bears, which can also lead to an increase in the temperature of the bearing shell.

　　4. Control methods

　　To maintain the temperature of the generator bearing within the normal range, the following control methods can be adopted:

　　Strengthen lubrication and maintenance: Regularly inspect and replace lubricating oil to ensure the good operation of the lubrication system.

　　Control load: Whenever possible, avoid running the generator under high load for extended periods of time.

　　Reduce ambient temperature: By improving the operating environment of the generator, such as adding ventilation facilities, the impact of ambient temperature on the bearing temperature can be reduced.

　　Increase the oil pressure of the bearing: When necessary, the lubrication effect can be improved by increasing the oil pressure of the bearing, thereby reducing the temperature of the bearing shell.

　　In general, the temperature of the generator bearing should not exceed 85 ℃, but the specific value needs to be determined according to the specific specifications of the generator and the manufacturer's recommendations. In actual operation, close attention should be paid to changes in the temperature of the bearing and appropriate control measures should be taken to ensure the safe and stable operation of the generator.