Oil-lubrication high-temperature air-cooling pile nuclear power plant main cooling fan motor

Abstract

The invention relates to an oil-lubrication high-temperature air-cooling pile nuclear power plant main cooling fan motor. The motor is a key device in a nuclear power island of a high-temperature air-cooling pile nuclear power plant, and works like a pressurized water reactor nuclear station main pump motor. An upper guidance thrust combined bearing and a lower upper guidance thrust combined bearing of the motor are arranged upper and lower ends of a motor stator. A motor support seat is arranged under the motor. By changing the rule and a design idea that a thrust bearing of a normal vertical motor is arranged under a guidance bearing, so it is the first time to use a rare lubricating sliding bearing structure on a high speed vertical motor. It proves that rare lubricating sliding bearing can be also used in a large vertical high speed motor, so the vertical motor design technology is improved, the new design field of high speed vertical motors is opened up and it is the first time to use a rare lubricating sliding bearing structure on a high speed vertical motor. The motor is suitable for large-power vertical high speed motor, especially for the high-temperature air-cooling pile nuclear power plant main cooling fan motor.

Description

technical field [0001] The invention relates to an oil-lubricated motor for a main cooling fan in a high-temperature gas-cooled reactor nuclear power plant. Background technique [0002] Conventional nuclear power plants use liquid (water, heavy water or light water) as the coolant, and the coolant pump is driven by a power frequency vertical asynchronous motor, and the motor speed is mostly 1500rpm (50Hz power frequency power supply) or 1800rpm (60Hz power frequency power supply). The speed of the power frequency vertical asynchronous motor is constant and not high, the technical difficulty is small, and the production is relatively easy. [0003] High-temperature gas-cooled reactor nuclear power plants with higher safety use helium as the main coolant of the reactor, and the helium is circulated through the fan unit for heat exchange. The previous high-temperature gas-cooled reactors were all experimental in nature, and the reactor power was small. The power of the helium...

AI Technical Summary

Problems solved by technology

The previous high-temperature gas-cooled reactors were all experimental in nature, and the reactor power was small. The power of the helium compressor fan motor used was small, and the speed was low, which could not be suitable for the needs of high-power commercial reactors.

For high-power vertical high-speed motors, the bearings are expensive electromagnetic bearings. Although they can meet the needs of high-speed motors, they are expensive, have low service life, are difficult to install and maintain, and are not suitable for mass production.

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