System and method for monitoring eccentricity of turbine-generator unit shaft system online

Abstract

The invention discloses a system and method for monitoring eccentricity of a turbine-generator unit shaft system online. The amplitudes and phases of the eccentricity of the shaft system of an eccentricity sensor and vibration sensors at all bearing bushes are calculated in real time according to difference values of maximal voltages and minimum voltages of the eccentricity sensor and the vibration sensors at all the bearing bushes, the included angles of the eccentricity sensor and the vibration sensors at all the bearing bushes with a key-phase sensor, and coefficients of the eccentricity sensor and the vibration sensors at all the bearing bushes, and the calculated values are sent to a computer of an operator to be displayed in real time, so that the operator grasps the change conditionof the eccentricity of the turbine-generator unit shaft system in real time. Besides, a detection device is installed on power plant equipment all the time, and the problem in the prior art that real-time online monitoring cannot be achieved and time limit is caused when the detection device needs to be disassembled and assembled is solved.

Description

technical field [0001] The invention relates to an on-line monitoring system for shafting eccentricity of a turbogenerator set and a monitoring method thereof, belonging to the field of safe operation of the turbogenerator set. Background technique [0002] Steam turbines and generators are the main equipment in thermal power plants, which are responsible for converting heat energy into electrical energy. Turbine-generator shaft eccentricity is an important data, which can reflect the bending degree of steam turbine-generator rotor affected by factors such as thermal stress or gravity, and is an important parameter monitored during start-up and shutdown. According to the requirements on the running of the steam turbine generator set in the "Technical Specifications for Electric Power Construction Construction Part 3: Turbine Generator Units" and "Technical Specifications for Unit Commissioning of Thermal Power Construction Engineering Units", the deviation between the eccent...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to design an on-line monitoring system and monitoring method for the shafting eccentricity of the turbogenerator set for the power plant itself, so as to solve the problem that the current technical operators cannot grasp the change of the shafting eccentricity of the turbogenerator set in real time. Problems and the need to rewire and install the equipment during monitoring, and the need to remove the equipment after the monitoring is completed, resulting in time constraints, and the continuous real-time online monitoring of shafting eccentricity and phase cannot be realized

Images