Nuclear power plant important pump gear box operational state evaluation method

Abstract

The invention discloses a nuclear power plant important pump gear box operable state evaluation method comprising the following steps: S1, regularly detecting the surface topography of a gear of an important pump gear box, and determining whether the gear fails or not according to a failure standard; S2, establishing a material cyclic stress-strain curve; S3, determining a stress process; s4, drawing an SN curve; s5, modeling analysis: establishing a gear box operation model, and adopting stress simulation analysis to obtain stress states of different positions on the surface of the gear in the dynamic meshing process of the gear; s6, fatigue life calculation: calculating the life of each component gear in the gear set during fatigue fracture, and obtaining the stress states of different positions of the gear surface at the same time. The invention provides an effective method for evaluating the operable life of the gear box, which is used as an effective evaluation means for judging the operability of the gear box so as to improve the operation reliability of equipment and guide an on-site operation and maintenance strategy.

Description

Technical field[0001]The present invention belongs to the field of nuclear power technology, involving gearbox operability evaluation methods, and more particularly to a nuclear power plant important pump gearbox can operate evaluation method.Background technique[0002]There is a gearbox with a gearbox with a nuclear power plant, and the reliability requires high technical characteristics. It has long been spent on a long period of time, and even the fatigue is caused by broken teeth. For nuclear power plants, important pump sets such as circulating pumps, such as the failure of gearbox, will cause the unit to drop the power or even downtime, causing major economic losses. It is therefore necessary to study the failure mechanism of the nuclear power plant important pump gearbox, predicted the operating life of the gearbox, and studied a complete set of gearboxs to perform evaluation techniques to guide important pump gearbox on-site operation and maintenance.Inventive content[0003]Th...

AI Technical Summary

Problems solved by technology

[0002] Gearboxes equipped with important pump sets in nuclear power plants have technical characteristics such as large transmission power and high reliability requirements. After long-term operation, gear tooth surfaces have peeled off many times, and even teeth are broken due to fatigue.

For important pump sets in nuclear power plants such as circulating water pumps, if the gearbox fails, it will cause the unit to reduce power or even shut down, causing major economic losses

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