Closed-type ventilation cooling system provided with stainless steel lamp bulb shell and used for large lamp bulb tubular pump unit and ventilation design calculation method thereof

Abstract

The invention belongs to the field of ventilation cooling of energy power machines, and discloses a closed-type ventilation cooling system provided with a stainless steel lamp bulb shell and used for a large lamp bulb tubular pump unit and a ventilation design calculation method of the closed-type ventilation cooling system. The closed-type ventilation cooling system comprises a ventilator, a motor, a ventilating slot of the motor, an air gap of the motor, the stainless steel lamp bulb shell, an adherent air duct inside the stainless steel lamp bulb shell, a wind shield and a center air duct, wherein the motor drives a tubular pump to operate; the center air duct is defined by the wind shield; the center air duct, the adherent air duct, the air gap in the motor and the ventilating slot in the motor form a closed circulating air duct. The stainless steel lamp bulb shell free of being coated with anti-rust paint on the outer surface is adopted, a ventilation circuit is optimized and designed, the heat conduction capacity and the heat convection capacity are enhanced greatly, an air cooler and a cooling water system of the air cooler are omitted, and the resistance of the system is lowered. In this way, the equipment cost of the system is lowered, the reliability of the system is improved, and the operating expenses of the ventilation cooling system are lowered greatly.

Description

technical field [0001] The invention relates to a ventilation and cooling method for a large motor, in particular to a closed ventilation and cooling system for a stainless steel bulb case of a large bulb tubular pump unit and a ventilation design calculation method thereof, belonging to the field of ventilation and cooling of energy and power machinery. Background technique [0002] At present, the forced air circulation air cooler cooling + water external cooling system used in the motor cooling of the bulb tubular pump unit is to combine the bulb shell, air duct, windshield, fan, air cooler and motor (mainly ventilation slots and air Gap), etc. constitute a closed space, containing a certain volume of air, using the fan and rotor to force the air to flow, the hot air that absorbs the heat generated by the motor is cooled by the air cooler, and the air cooler needs to take away the heat absorbed by the cooling water, and part of the heat passes through Conduction is cooled...

AI Technical Summary

Problems solved by technology

When the running time is long, the inner wall of the air cooler is fouled due to poor cooling water quality, and the cooling effect gradually deteriorates

[0004] (2) High operating cost of the system

When the cooling system is running, the operating costs of the air cooler cooling water pump and cooling water treatment equipment in the system are high

[0005] (3) The anti-rust paint on the bulb shell has poor thermal conductivity and surface heat transfer performance, which reduces the cooling effect of the water flow in the outer flow channel of the bulb shell

At present, the material used for the bulb shell is ordinary steel plate, the thermal conductivity is about 34W / (m K), the inner surface is coated with anti-condensation coating, the thermal conductivity is 0.046W / (m K), the outer surface is coated with anti-corrosion paint, and the heat conduction The coefficient is about 0.16W / (m·K), which is not conducive to the passage of water through the bulb shell to cool the hot air in the gap in the bulb shell

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