Steam turbine generator iron loss test vibration and noise testing method

Abstract

The invention relates to a steam turbine generator iron loss test vibration and noise testing method. Acceleration sensors are installed at a steam turbine generator stator iron core pressing plate, a cross-core screw, a yoke part, a press finger part, a stator winding water box and an end ring part, and vibration signals are collected. Sound pressure sensors are installed with distances of one meter from a steam end and an exciter end, and noise signals are collected. The measurement is carried out through a dynamic signal analysis system, and then whether an iron core is pressed tightly and whether electromagnetic resonance exists at a winding end part are judged according to an analysis result. Through the application of the method, the vibration problems of the stator iron core and the winding end part can be solved, the potential safety hazard brought by the excessive vibration of the stator iron core and the winding end part are prevented, and the long-term stable operation of a unit is ensured.

Description

technical field [0001] The invention relates to a method for testing vibration and noise of a steam turbine generator iron loss test. Background technique [0002] The stator iron loss test is an important method to check the assembly quality of the stator core of the generator, and it is also an important process to check the insulation performance of the iron core itself. Tightness will lead to the loosening of the end of the stator core, the broken teeth of the end core, and the breakage of the ventilation channel steel of the end core, which will cause large vibration and noise during the operation of the core, and eventually cause the entire stator to be scrapped and the stator must be replaced. The end of the stator winding is under the action of electromagnetic oscillating force for a long time. If the structure is loose, resonance may occur. Even if the overall resonance does not occur, the relaxation phenomenon will gradually increase, eventually leading to insulati...

AI Technical Summary

Problems solved by technology

[0002] The stator iron loss test is an important method to check the assembly quality of the stator core of the generator, and it is also an important process to check the insulation performance of the iron core itself. Tightness will lead to loosening of the end of the stator core, broken teeth of the end core, and breakage of the ventilation channel steel of the end core, which will cause large vibration and noise during operation of the core, and eventually cause the entire stator to be scrapped. Replace the stator

The end of the stator winding is under the action of electromagnetic oscillating force for a long time. If the structure is loose, resonance may occur. Even if the overall resonance does not occur, the relaxation phenomenon will gradually increase, which will eventually lead to insulation wear and short circuit grounding

Images