72. Why must the oil temperature be no lower than 25°C at startup, and no lower than 30°C during speed increase??
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72. Why must the oil temperature be no lower than 25°C at startup, and no lower than 30°C during speed increase??
The viscosity of turbine oil is greatly affected by temperature; when the oil temperature is too low, its viscosity increases, which leads to uneven distribution of the oil, increased friction losses, and even bearing friction. Therefore, the oil temperature at startup must not be lower than 25°C. During acceleration, friction losses increase as the speed rises; therefore, higher lubrication requirements are needed, which in turn demands a higher oil temperature that should not be lower than 30°C.
The viscosity of turbine oil is greatly affected by temperature. When the oil temperature is too low, the viscosity of the oil increases, which leads to uneven distribution of the oil, increased friction losses, and even bearing wear. Therefore, when the unit starts up, the oil temperature should be at least 25°C. As the speed increases during acceleration, friction losses rise as well, requiring higher standards for lubrication; hence, the oil temperature should not be lower than 30°C℃