Debugging 丨 turbine bearing temperature on the high side

Debugging 丨 turbine bearing temperature on the high side - 2018 10 - 08 loading stage 5 watts temperature climb at a factory, some of temperature measurement is no problem. General segment temperature on the high side and tile oil film thickness is too thin, and some of the reasons for oil film thickness too thin, more common are: tile design improper selection, oil of hard particles, oil shortage, tile and inadequate self-aligning ability, compared to the same type unit commissioning, design selection can be excluded. Oil has a high probability of hard particle, the new unit qualified lubricating oil is unlikely to exist in a large number of hard particle, but occasionally mixed with a small amount of hard particles into the tile and scratch segment. Hard particle damage tile rising temperature usually takes a long time the operation of the accumulation, short time 1, 2 times of hard particle scratch does not generally induced temperature soared. Small enough oil such as tile oil hole, loose oil inlet pipe joint often were found at the beginning of the unit, and is accompanied by oil temperature rise obviously, and 5 wawa climbing in the process of warm, oil temperature rise only 2 degrees or so, not too obvious, tile temperature surge is unlikely to be joint suddenly fall off. Is not good for mature machine installation process control caused by the segment from a lack of ability often occur in the process of construction unit, because didn't pay attention to when you install tile ellipse tile self-aligning ability check, lead to segment from a lack of ability, when the unit load bearing in the cold and hot state of the rotor degree, great changes have taken place tile cannot follow axis swaying back and forth, tile cannot remain good parallelism and axis, the segment of the bearing surface cannot be effectively used, local tile surface load heavier load after load, bearing oil film on the surface of thin, tile bearing capacity decreased, when the tile load bearing capacity of more than obvious rise and the temperature will happen unilateral wear, the related key monitoring of temperature, and increased 5 watts input, cut lube oil temperature, the effect is not obvious, the headquarters decided to arrange the downtime of tile inspection, found that the unilateral wear obviously, according to the technological requirement after processing after processing again again boot loading, temperature did not rise again. （ Yongtai nanyang power plant technology exchange)