Water-lubricated thrust pad lateral elastic baffle limit structure

Abstract

The invention relates to a water-lubricated thrust shoe lateral elastic baffle limit structure, the first side baffle (1) is provided with a lock arm (12), the lock arm (12) is provided with a first limit head (3), the first The limit head (3) is inserted into the thrust tile base (2), and there is a first gap (55) in the left vertical direction between the first limit head (3) and the thrust tile base (2). The invention adds a self-locking structure, the side baffle is inserted into the side groove of the thrust tile to lift the lock arm, and the side baffle is inserted into the thrust tile to the position and then the lock arm is lowered, so that the limit head of the lock arm snaps into the thrust tile, And the preload step is set to keep the relative position of the side baffle and the tile base fixed, avoiding the cumbersome structure of the traditional water-lubricated bearing pad using screws to close the side baffle, reducing parts and improving reliability. The invention is suitable for the water-lubricated thrust bearing of the shielded motor of the high-power nuclear main pump of the third-generation nuclear power, and can be widely used in the fields of nuclear power, national defense, chemical industry, ship power and the like.

Description

technical field [0001] The invention relates to a lateral elastic baffle limiting structure of a water-lubricated thrust pad, which is applied to the field of nuclear reactor coolant pump water-lubricated bearings. Background technique [0002] Improving the reliability of the reactor coolant pump (referred to as the nuclear main pump) is of great significance to improving the safety level of nuclear power plants. Traditional pressurized water reactor nuclear power plants generally adopt the safety concept of addition, that is, increase system redundancy or equipment redundancy. Although the safety is improved, the cost and complexity increase. and integration, reducing system complexity and improving system reliability. Traditional shielded motors or wet winding motors use water-lubricated bearing technology to balance the axial water thrust. The thrust tile uses a baffle to fit the side of the tile base to limit the circumference of the graphite tile surface, but the baff...

AI Technical Summary

Problems solved by technology

Traditional pressurized water reactor nuclear power plants generally adopt the safety concept of addition, that is, increase system redundancy or equipment redundancy. Although the safety is improved, the cost and complexity increase. and integration, reducing system complexity and improving system reliability

Traditional shielded motors or wet winding motors use water-lubricated bearing technology to balance the axial water thrust. The thrust tile uses a baffle to fit the side of the tile base to limit the circumference of the graphite tile surface, but the baffle and the thrust tile base use bolts. The closing position is just located in the flow channel between the two thrust pads, where the bearing flow field is relatively complicated and the flow velocity is high. It is expected to be loose and fall, which will have a certain impact on the safe operation of the motor. In order to control the locking effect, more process costs and complex process control costs are required

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