Answer:
It must be broken and needs to be shut down for processing, or the temperature measurement equipment may have failed.
When the steam turbine is in the no-load stage, the exhaust steam is overheated due to the small steam flow rate, the throttling of the steam valve and the blowing friction of the medium and low pressure rotors. state, but at this time the exhaust pressure is not high, the heat load per unit area of the condenser is not large, the vacuum can still be adjusted, and the condenser copper tube expansion port will not be damaged by too much thermal shock, so the exhaust temperature It can be allowed to be higher. Generally, the exhaust steam temperature is not allowed to exceed 120℃ during speed increase and no load.
Because during normal operation, if the exhaust steam temperature is too high and exceeds 65 degrees, the vacuum will definitely be low. 1. The available enthalpy drop of the unit will decrease, the output of the unit will decrease, and the economy will be poor; 2. It will change the centerline of the unit and easily increase the vibration of the unit; 3. The axial displacement is too large, causing the thrust bearing to be overloaded and worn; 3. The blades will be overloaded due to the increase in steam flow; 4. Condensation The reason why the expansion of the copper tube of the device is loose is because if the exhaust steam temperature is too high and the circulating water volume remains unchanged, the copper tube will be cooled, but the tie bars of the low-pressure cylinder and the condenser will not be cooled, so the steel tube will shrink, so the copper tube will shrink. The expansion of the pipe is loose. 5. If the low vacuum protection does not operate, the low pressure cylinder safety door will operate. Because of the above reasons, it is stipulated that the exhaust steam temperature should not exceed 65 degrees during normal operation.
After driving for half an hour, what is the normal range of the generator temperature?
Generally, there won’t be any big problems. In fact, the key is related to the engine oil grade. Generally, low-viscosity engine oil is used in low-temperature environments, and high-viscosity oil is used in high-temperature environments. The other thing related to temperature is the motor. If the temperature is too high, the efficiency of the motor will decrease. Therefore, when the temperature is high, be careful to maintain good ventilation and do not overload it!
It is normal for a car generator to generate heat during operation. Generally, during normal operation, the surface of a car generator will be hot to the touch after a few minutes of operation. When the car generator rotates at 3000r/min and works for about 30 minutes, the temperature rise on the surface of the generator's casing will reach the highest level. value (about 130 degrees, plus the ambient temperature, the table