A bearing bush oil deflecting ring

Abstract

The present invention relates to a bearing pad oil baffle ring including an inner ring, an outer ring, a locating pin and a fastening screw (7), the locating pin and the fastening screw are located between the inner ring and the outer ring, the bearing pad oil baffle ring is characterized in that: an inner ring binding surface (14) fixed connection way is designed from a bolt fixed connection way to a plug fixed connection way, namely, an inner ring upper half part (2) and inner ring lower half part (3) binding surface (14) is respectively provided with a convex shoulder groove (9) and a convex shoulder (12), and is also provided with the locating pin and a punching pin (8) for connecting, locating and preventing circumferential rotation, the grove width of the convex shoulder groove (9) on the inner ring is widened to prevent shearing damage of the punching pin (8), the width of a convex shoulder at the position of an outer ring locating part hole of the outer ring is correspondingly increased, a de-weight groove (13) is arranged on the inner ring, the bearing pad oil baffle ring has the characteristics of simple structure, safe use, easy installation, high strength and the like.

Description

technical field [0001] The invention relates to the technical field of steam turbine generators, in particular to a bearing bush oil deflecting ring that can be widely used in 600MW steam turbine generator sets. Background technique [0002] At present, 600MW turbogenerator units in various power generation enterprises across the country are put into operation. Problems with the oil retaining ring often occur during operation. Usually, a certain bush in the shaft system suddenly has a large shaft vibration, and there are abnormal sounds in the bearing box accompanied by metal Knocking sound, during the shutdown process, due to the breakage of the inner ring of the oil deflector ring or the loss of the fastening bolts on the joint surface of the oil deflector ring, the internal pressure of the pad is reduced, and the burning of the bearing pad is likely to occur during the coasting process. After replacing the inner ring of the oil deflecting ring of the bearing bush for many...

AI Technical Summary

Problems solved by technology

After measuring the fit between the inner ring of the oil deflector ring and the outer ring of the oil deflector ring, it was found that there were some problems in the fit depth between the radial positioning grooves of the inner ring of the oil deflector ring and the radial positioning pins of the outer ring of the oil deflector ring. Taking some measures can only prolong the damage period but not completely solve it

These situations show that the problems or faults of the oil deflector ring in the operation of the steam turbine generator set in the power generation enterprise often cause the unit's pad shaft to vibrate too much, abnormal noise in the bearing box, and burnt tiles and other accidents.

At the present stage, domestic and foreign steam turbine generator sets or large and medium-sized turning bearing mechanical seals usually adopt a sealing method that combines dynamic and static oil retaining rings. However, since the static oil retaining ring is a straight cylinder, splashes on the static ring The lubricating oil cannot freely flow back to the bottom of the inner wall of the bearing pad sealing end cover, so that oil leakage or oil leakage often occurs at the joint between the sealing end cover and the rotating shaft; When the radial clearance of the shaft is zero or the clearance is too small, the dynamic and static rings will have serious friction and cause damage

However, the investigation found that the breakage of the positioning pin of the outer ring of the oil deflector ring or the failure of the turbine generator set in the power generation company often caused accidents such as excessive vibration of the pad shaft of the unit, abnormal sound in the bearing box, and tile burning.

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