Dynamic Balance Calculation For Rotor & Orbit Of Shaft Centerline Recognition For Rotor

The saturated steam turbine is an important part of the nuclear power equipment of ships, and the rotor is a major working part of the turbine. It has very important significance that monitoring rotor condition form orbit of shaft centerline, which can assure the turbine running unfailingly and reducing the rate of accident.A lot of papers about rotor dynamic balance and orbit of shaft centerline recognition has been read by the author and let as the basis. In this paper, the object of study is the turbine of the nuclear power equipment of ships, based on the study of dynamics specific property of the turbine rotor and common fault and its orbit of shaft centerline character, the system of dynamic balance calculation for turbine rotor and orbit of shaft centerline recognition based on BP network has been designed. In this system the computer is the most important part. The computer can control the real-time data acquisition and has the data of all kinds of parameters processed and analyzed. The system can evaluate the running status of the saturated steam turbine. It also can display and save the processed results. The system can give an alarm to the abnormal status. If the saturated steam turbine has faults the system can diagnose them. Moreover, the system has the complete functions and convenient operations. The system will play an important action in directing the running and maintaining of the saturated steam turbine.A rotor experimental platform had been constructed. It provided an experimental platform for fault analysis and fault diagnosis. The experiment for the system of dynamic balance calculation which designed with the method of influence coefficients had been carriedout, the experimental results indicated that the program can calculate the balance mass and phase, the results also showed the feasibility of method of influence coefficients and correctness of the program. Besides, a series of experiments of unbalance and non-alignment had been carried out, a great deal of data had been acquired, the pattern recognition system for orbit of shaft centerline based on BP network had been trained using these data, the system can on-line recognize the faults of unbalance and non-alignment. The experimental results indicated that the orbit of shaft centerline that the system acquired were consistent with the fault modes. The results showed the feasibility and validity of carrying out fault analysis and fault diagnosis with the orbit of shaft centerline. They also showed the correctness of the running of the recognition system .