Protection method for thrust bearing of axial-flow fixed-blade generator set based on multi-feature fusion

Abstract

The invention discloses a method for protecting the thrust bearing of an axial-flow fixed-propeller generating set based on multi-feature fusion, which includes: measuring and calculating the dynamic lifting amount of the hydro-generating set, the turning angle of the thrust head, the inclination of the thrust pad, and the wave of the mirror plate degree and the non-perpendicularity between the main shaft and the mirror plate; if the dynamic lifting amount is greater than the preset dynamic lifting amount threshold, the thrust head flip angle is larger than the preset thrust head flip angle threshold, and the thrust tile inclination is larger than the preset thrust tile If any one of the inclination threshold, the waviness of the mirror plate is greater than the preset waviness threshold of the mirror plate, or the non-perpendicularity between the main axis and the mirror plate is greater than the preset non-perpendicularity threshold between the main axis and the mirror plate, an alarm signal will be output. The invention more comprehensively reflects the operating state and health status of the thrust bearing of the unit, thereby accurately assessing and predicting potential defects and problems existing in the operation of the thrust bearing, and ensuring the stability and safety of the thrust bearing operation.

Description

technical field [0001] The invention relates to the field of thrust bearings of axial-flow hydroelectric generator sets. More specifically, the present invention relates to a method for protecting the thrust bearing of an axial-flow fixed-propeller generator set based on multi-feature fusion. Background technique [0002] Axial flow turbine refers to the impact turbine in which the water flow enters the runner from the axial direction and flows out from the axial direction along its blades, converting the energy of the water flow into mechanical energy. As a key component of the axial flow hydroelectric generator, the thrust bearing provides support for the weight of the rotating part and water thrust of the hydroelectric generator set, and its operating state directly determines the safety and stability of the unit operation. Statistics on the failure of foreign hydroelectric generator sets show that the accident shutdown of the unit due to the failure of the bearing (thru...

AI Technical Summary

Problems solved by technology

Due to the lack of effective monitoring means for thrust bearings, it is impossible to achieve effective monitoring, positioning and early warning of faults

[0003] At present, the monitoring of thrust bearings at home and abroad is mainly focused on the monitoring of thrust pads, and this monitoring is still in its infancy. Most monitoring systems only stay at the monitoring of thrust pad temperature and oil temperature. For other important thrust bearings Operating parameters, such as core monitoring parameters such as mirror plate waviness, unit lifting amount, improper fit of thrust head mirror plate, non-perpendicular main shaft and mirror plate, and thrust tile inclination and tilt azimuth, are still in a blank stage, and it is difficult to implement online monitoring , and still needs further development and research

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