Rotor torsional vibration excitation and vibration analyzing experimental system

Abstract

The invention discloses a rotor torsional vibration excitation and vibration analyzing experimental system, and belongs to the technical field of rotating machine experimental devices. The rotor torsional vibration excitation and vibration analyzing experimental system comprises a multi-span rotor test bed, a rotor torsional vibration exciting device and a rotor vibration monitoring and analyzing system. In the rotor torsional vibration exciting device, an alternating signal generated by a signal generator is processed by a power amplifier and a transformer and then is overlapped with an output signal of a direct current voltage stabilization linear power source, and the overlapped signals serve as the input of a direct current motor to enable the direct current motor to output fluctuation torque. A rotor of the multi-span rotor test bed generates torsional vibration under the excitation of the fluctuation torque, and the rotor transverse vibration and rotor torsional vibration are monitored by the rotor vibration monitoring and analyzing system. The excitation and measuring of the torsional vibration of the rotor system can be finished under the condition of a laboratory, and the rotor torsional vibration excitation and vibration analyzing experimental system can be used for studying the relation between the transverse vibration and the torsional vibration when the rotor system is excited by the torsional vibration, and analyzing the characters of the rotor system excited by the torsional vibration. The rotor torsional vibration excitation and vibration analyzing experimental system is easy to achieve and complete in function, and is mainly used for the fields of rotating machine scientific researches and teaching.

Description

technical field [0001] The invention relates to the field of rotating machinery experimental systems, in particular to a method for torsional vibration excitation and vibration analysis of a rotating machinery rotor system and an experimental device thereof, belonging to the technical field of rotor system experimental equipment. Background technique [0002] The rotor system is widely used in rotating machinery such as steam turbines and gas turbines. It is a key component for power transmission and energy conversion in power generation equipment. Its safety and reliability are directly related to the safety and reliability of the entire equipment. With the development of modern large-scale rotating machinery, high-parameter and large-capacity units have become an effective way to improve efficiency and reduce pollution emissions. The size of its rotor system continues to increase, and the shafting length of a million-unit steam turbine exceeds 45 meters (single-shaft arrang...

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Problems solved by technology

Transverse vibration monitoring devices are usually installed in conventional power generation equipment, torsional vibrat

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