Bearing device capable of meeting safe falling off of fall-off type flywheel

Abstract

The invention relates to a bearing device capable of meeting safe falling off of a fall-off type flywheel. The bearing device is composed of a bottom plate, a welding tray, an engaged tray, a dampingplate, damping pins and the like. The bearing device is compact in structure, and is firmly fixed under the flywheel by a welding and engaged mode. When an overspeed accident occurs to a main pump driving motor of a nuclear power plant, the fall-off type flywheel falls off, the copper damping pins which are arranged on the surface of the bearing device are in contact with and friction with the flywheel, through the loss of the copper damping pins, the flywheel is safely slowed down to stop, and the function of bearing the flywheel is achieved. After the main pump driving motor stops safely, the damping pins can be replaced and the bearing device can be reinstalled and put into use, so that the maintenance time and maintenance cost after the nuclear power plant accident are reduced greatly.With the construction and popularization of nuclear power plants and the use of civil high rotary inertia, high safety vertical asynchronous motors in more fields, the bearing device capable of meeting the safe falling off of the fall-off type flywheel can be widely used in the nuclear power, chemical industry and other fields, and broad application fields and market prospects are achieved.

Description

technical field [0001] The invention relates to a bearing device that meets the requirement of safe falling off of a detachable flywheel. Background technique [0002] In order to prevent the fuel elements in the reactor from burning out in the event of a power failure in a nuclear power plant accident, the main cooling system of the reactor uses a main pump to drive the motor rotor with a large-mass flywheel, which is used to store energy and make the main pump rotate during a short but critical period after a power failure. , take away the excess heat after the accident. There are two common flywheel structures, one is a non-detachable flywheel structure, when an overspeed accident occurs in a nuclear power plant, the flywheel may break, affecting the safe operation of the main pump drive motor and even the nuclear power plant; the other is a detachable flywheel structure, in the event of an overspeed accident, the flywheel can fall off the motor shaft, thereby avoiding e...

AI Technical Summary

Problems solved by technology

There are two common flywheel structures, one is a non-detachable flywheel structure, when an overspeed accident occurs in a nuclear power plant, the flywheel may break, affecting the safe operation of the main pump drive motor and even the nuclear power plant; the other is a detachable flywheel structure, in the event of an overspeed accident, the flywheel can fall off the motor shaft, thereby avoiding excessive centrifugal force and damaging the flywheel and causing serious safety accidents. However, when the flywheel falls off, it will collide with other parts of the motor. Can cause damage to the motor and the flywheel itself

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