Evaporation cooled device for stator of steam turbo-generator and hydraulic generator

Abstract

The device includes the evaporative cooling chamber and the condenser. The heating unit in the stator of the generator is dipped in the cooling medium in the evaporative cooling chamber. The condenser located above the cooling chamber is carried out heat exchange with the steam of the cooling medium. The bottom of the condenser through a one-way valve is connected to the upper evaporative space in the cooling chamber. A communicating tube connects between the bottoms of the condenser and the near return liquid tank, and they have same horizontal level. The tank at certain height through the return liquid tube, where a one-way valve and a solenoid valve are installed, is connected to the evaporative space. The water leak meter, the pressure controller and the air escape valve are installedin the condenser. The invention prevents short circuit caused by leaky cooling water from the condenser to the evaporative cooling chamber so as to raise reliability

Description

technical field [0001] The invention belongs to motor cooling technology, and relates to an evaporative cooling device for a stator of a steam turbine and a water turbine generator. Background technique [0002] Large-scale generators include turbo generators and hydro generators (referred to as motors in this article). The use of evaporative cooling technology has the advantages of better cooling effect, safer and more reliable operation than commonly used air-cooled, water-cooled, and hydrogen-cooled units. The evaporative cooling of the generator stator is to soak the heat-generating parts of the motor stator in the liquid cooling medium, or pour the liquid cooling medium into the hollow conductor cavity of the motor stator winding, and use the principle of the liquid cooling medium to vaporize and absorb heat to cool the motor stator . The selected evaporative cooling medium should have a boiling point that can meet the temperature rise requirements of the motor, and sh...

AI Technical Summary

Problems solved by technology

In the above-mentioned evaporative cooling device, although the condenser can meet the heat exchange requirements for cooling the stator of the evaporative cooling motor, since the condenser is directly connected with the evaporation space where the electric heating element of the motor stator is located, once the cooling water pipe in the condenser In the event of leakage, the secondary cooling water may immediately enter the cooling medium that is in direct contact with the charged heating element, causing a short circuit accident

Even if there is an alarm, it is difficult to avoid accidents once the cooling water pipe leaks

Images