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Research of pressure pulsations and vibration in the turbine 1,000 MW
Procházka, Pavel ; Vaněk, František ; Sadílek, J.
The paper describes the methods and equipment used in experimental research of pressure pulsations with simultaneous measurement of vibration of the stator and blades of the third moving wheel in the turbine 1,000 MW at the nuclear power plant Temelín in 2012. The aim of this work was to find links and possible sources of blade vibration during the turbine start-up. The observed phenomena are analyzed, focusing on the causes of blade vibrations in the stage L-1.
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Investigation of friction effect on a blades model
Půst, Ladislav ; Horáček, Jaromír ; Veselý, Jan
The blades model consists of two steel beams with rectangular cross-sections, fixed to the masive block. A loading device for normal force in the friction contact, exciting system and variouspickups togeteher with accessory apparatuses for evaluation and recordng completes the measurement set-up. The dynamic stiffnes, lost energy and equivalent coefficient of damping were ascertained. The found influences of normal force, excitation apmplitude and frequency on the reduction of both beams vibration amplitudes form a base for optimal destign of friction elements.
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