Gasoline Generator Temperature Rise Requirements and Cooling Methods

Gasoline Generator Temperature Rise Requirements and Cooling Methods

Gasoline generators are used as emergency power supplies and require long periods of uninterrupted operation. With such a large load, the temperature of the generator set becomes a problem. To maintain good uninterrupted operation, the temperature of the generator set must be kept within a tolerable range. Within this, we need everyone to understand the temperature rise requirements and cooling methods.

First, temperature rise requirements

According to the different insulation levels of gasoline generators , the temperature rise requirements are not the same. Generally, when the generator is in operation, its stator windings, excitation windings, iron cores, collector rings, etc. have a temperature of about 80 degrees, exceeding 80 degrees. Temperature rise is too high.

Second, the cooling method

Generators of different types and capacities have different cooling patterns. However, the cooling medium used is generally air, hydrogen, and water. Taking the turbine synchronous generator as its line, its cooling system is closed and the cooling medium is recycled.

(1) Air cooling

Air cooling uses a fan to supply air. The cold air is used to blow the heat to the generator set's winding end, the generator set's stator and rotor. The cold air absorbs heat and turns into hot air. At the beginning of the air between the stator and the rotor After confluence, it is discharged through the air duct of the iron core and cooled by a cooler. The cooled air is then sent by the fan to the generator for recycling to achieve heat dissipation. Medium and small synchronous generators generally use air cooling.

(2) Hydrogen cooling

Hydrogen cooling uses hydrogen gas as the cooling medium. The heat dissipation performance of hydrogen is better than that of air. Dairy turbine generators are mostly cooled by hydrogen.

(3) Water cooling

Water cooling is the use of a stator and rotor with internal cooling in double water. The external water system of the cold water of the stator water system flows through the water pipe to the inlet ring installed on several seats of the stator, and flows through the insulation pipe to each coil respectively, absorbs the heat, and then is collected by the insulating water pipe to the outlet ring installed on the base. It is then discharged into the water system outside the generator for cooling. The cooling of the rotor water system first enters the water inlet support mounted on the shaft end of the exciter, then flows into the center hole of the shaft, flows along the several meridional holes to the collecting tank, and then flows through the insulating tube to each coil. After the cold water absorbs heat, it flows into the outlet tank through the insulation pipe, and then flows through the drainage hole on the outer edge of the outlet tank to the outlet bracket and is led out by the outlet manifold. Because the heat dissipation performance of water is much higher than that of air and hydrogen, the new large-scale generator sets generally use water cooling.

Especially in the summer, the long-term operation of the gasoline generator set is likely to result in excessive temperature. Therefore, we must pay close attention to the temperature rise of the unit and adopt appropriate cooling methods to cool the unit. In addition, the ventilation of the engine room is also Very particular about the simultaneous development of a variety of cooling measures, the cooling ventilation effect that will be achieved to ensure that the gasoline generator set is in operation.