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Yan Xianguo
Taiyuan Heavy Machinery Institute,
Taiyuan 030024, China China
Guan Huiling
Theory of Lubrication and
Bearing Institute,
Zhengzhou University,
Zhengzhou 450052, China
Zhang Youyun
Theory of Lubrication and
Bearing Institute,
Xi’an Jiaotong University,
Xi’an 710049, China
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Vibration Response and
Its
Characteristics of Centrifugal
Compressor with Rotating Stall*
Abstract:
Based on the beginning, propagating and ending mechanism of
rotating-stall cell, the relation between the pressure history
signal and the pressure distribution along rotor circumference
is proposed. The angular velocities of rotating-stall cell
propagating are computed from time series picked by the pressure
probes on a cross section. Self-relation calculating filtered
the random noise of the pressure history data. The exciting load
on rotor is computed by integral of filtered pressure signal along rotor circumference. By Prohl-Myklestad method, dynamical equations of rotor system are obtained. The dynamical response of rotor system is resolved by using Matlab
system. Further more, the situation of more than one of stall
cells is discussed. Two cases respectively from the natural gas
compressor of some fertilizer plant and the CO2 compressor of some nitrogenous fertilizer plant demonstrate that both methods of calculating the load exerted on rotor by pressure fluctuation and resolving the dynamic response of rotor are available and the characteristics of frequency spectrum of rotating stall are correct.
Key words:
Rotating stall Exciting from rotating-stall Characteristics of rotating stall
Symptom of rotating stall Self-relation analysis filter
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