Oil deflecting ring for bearing bush of steam turbine unit

Abstract

The invention relates to a turboset bearing bush oil retainer. The turboset bearing bush oil retainer comprises an oil retainer inner ring, an oil retainer outer ring, a positioning pin, an oil retainer combination surface (14) and a fastening screw (7). The oil retainer inner ring comprises an oil retainer inner ring upper and half section (2) and an oil retainer inner ring lower and half section (3). The oil retainer outer ring comprises an oil retainer outer ring upper and half section (1) and an oil retainer outer ring lower and half section (4). The turboset bearing bush oil retainer is characterized in that the fixed connection mode of the combination surface of the oil retainer inner ring upper and half section and the oil retainer inner ring lower and half section, namely the oil retainer combination surface (14) is designed to be a plugging fixed connection mode from a bolt connection fixation mode, namely, a crossette recessed groove (9) is arranged on the combination surface of the oil retainer inner ring upper and half section (2), correspondingly, a crossette (12) is arranged on the combination surface of the oil retainer inner ring lower and half section (3), and the positioning pin (10) preventing circumferential rotation is arranged on the oil retainer combination surface (14). The structure is simple, the turboset bearing bush oil retainer is safe to use, is convenient to install, and the intensity is high.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a bearing pad oil retaining ring of a steam turbine unit. Background technique [0002] At present, accidents such as excessive vibration of the pad shaft of the unit, abnormal sound in the bearing box, and burning of tiles often occur due to problems or failures of the oil deflector ring during the operation of the steam turbine generator set in a power generation company. 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 ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the shaft vibration of the existing above-mentioned types of models is too large suddenly and accompanied by abnormal sound in the bearing box, the inner ring of the oil deflector ring of the bearing is broken, and the inner ring of the oil deflector ring is broken. In the first and second half of the year, the fastening bolts of the joint surface were loose, and the positioning pins of the outer ring of the oil deflector ring were broken. After further analysis, discussion and conclusion, it was considered that the inner ring of the oil deflector ring of the bearing pad was broken, the positioning pin was broken, and the bolts on the joint surface of the inner ring of the oil deflector ring were broken. The main reason for loosening is that the radial matching position between the shoulder of the inner ring of the oil deflector ring and the positioning pin of the outer ring of the oil deflector ring is unreasonable, and the contact part between the positioning pin of the outer ring of the oil deflector ring and the positioning groove of the shoulder of the inner ring of the oil deflector ring is relatively small. The inner ring of the oil deflector ring is stuck at the lower part of the positioning pin of the outer ring of the oil deflector ring, the positioning pin of the inner ring of the oil deflector ring or the outer ring of the oil deflector ring is broken, the shaft vibration of the unit increases, and there are abnormal sounds in the tile, etc., the oil deflector ring The fastening bolts on the upper and lower joint surfaces of the inner ring are loose. Because the fastening bolts fail to reach the bearing capacity of the inner ring of the oil deflector ring, the tightness will be caused by continuous vibration during long-term unit operation or sudden accidents such as unit load shedding. In order to completely solve this defect, it is finally determined to change the technical structure and connection method of the joint surface of the inner ring of the oil deflector ring and provide the connection form of the joint surface of the inner ring of the oil deflector ring and the radial positioning of the oil deflector ring body. The pin assembly structure accurately calculates the weight of the inner ring of the oil deflector ring and appropriately increases the weight. The structure is simple, meets the design requirements, and is safe to operate. A kind of bearing pad oil deflector ring of steam turbine unit for accidents such as internal abnormal sound and burning tile

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