A steam turbine generator set

Abstract

The invention provides a steam turbine generator unit, which comprises an exciter rotor and a seat type bearing, wherein the seat type bearing comprises a bearing seat, a bearing bush, a first bearing press cover, a second bearing press cover, a first annular blocking part and a second annular blocking part; a lubricating oil channel is formed in the bearing seat; two ends of the bearing bush are in clearance fit with a bearing neck respectively through a first inner oil retainer sheet and a second inner oil retainer sheet; both the first and second bearing press covers are in clearance fit with the bearing neck; a first annular oil return groove communicated with the lubricating oil channel is formed in the first bearing press cover; a second annular oil return groove communicated with the lubricating oil channel is formed in the second bearing press cover; the first and second annular blocking parts are arranged on the bearing neck and protruded out of the surface of the bearing neck; the first annular blocking part is arranged in the first annular oil return groove and the second annular blocking part is arranged in the second annular oil return groove. According to the steam turbine generator unit, by virtue of the annular blocking part, lubricating oil splashed from the clearance among the inner oil retainer sheets and the bearing neck is effectively prevented; the oil leakage of the seat type bearing of the steam turbine generator unit is reduced; the potential safety danger caused by leaked oil is alleviated and the safe and civilized production of a power plant is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of power generation equipment, and more specifically, to a steam turbine generator set. Background technique [0002] Oil leakage from the bearings of turbogenerator sets is a "persistent" problem that affects the safe and civilized production of power plants. Especially, some small and medium-sized unit bearings often suffer from oil leakage, which poses a great potential safety hazard. [0003] In a commonly used 12MW turbogenerator set, the exciter rotor is supported by seat bearings at both ends; the seat bearing includes a bearing seat and a bearing bush fixed on the bearing seat by set screws, and the bearing bush and the journal of the exciter rotor have a gap fit To realize the rotational connection of the two. In order to eliminate the oil leakage phenomenon of the seat bearing, a copper oil retainer and a bearing gland located outside the copper oil retainer are respectively arranged betwe...

AI Technical Summary

Problems solved by technology

[0005] However, there is still a small amount of oil and oil gas leaking outward through the gap between the outer oil block and the journal during the working process of the above-mentioned seat bearing, resulting in waste of steam turbine oil

When the oil leakage is serious, the lubricating oil will pass through the inner and outer oil retainers on both sides of the bearing bush and throw oil outward, resulting in oil leakage into the exciter, aging the cable insulation and causing a breakdown accident, which has a large potential safety hazards, affecting the safe and civilized production of the power plant

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