Research On Control System Of High Speed Dynamic Balancing Machine

As compressor unit putting into operation,the speed of compressor rotor is extremely high.High speed dynamic balance test for compressor rotor is the very important procedure to ensure the rotor could run smoothly with high speed and high speed dynamic balancing machine is the key equipment to conduct high speed dynamic balancing test.High speed dynamic balancing machine control system is the groundwork to ensure the high speed dynamic test could be achieved successfully.In order to adapt to the variety of the compressor dynamic balance testing needs,400?50000 rpm range of rotor speed is adjustable.In order to reduce the air resistance and mechanical friction resistance in the process of rotor running with high speed,high speed dynamic balancing machine will operate in vacuum and lubricating condition.Based on the analysis of the working principle of high speed dynamic balance machine to ensure the efficient operation of high dynamic balancing machine as the goal,this paper dissertates respectively function and method of the high speed rotor system,lubricating system and vacuum control system.In accordance with rotor speed requirements as conducting rotor high dynamic balancing test and ensure the smooth operation of the rotor without pole,DCS500 governor is adopt to realize rotor speed control by regulating pressure.To meet the needs of different bearing lubrication oil flow and to supply lubrication with stable flow and pressure,Fuzzy-PID controller was designed to ensure the lubricating oil flow.In order to ensure the rotor could run smoothly under vacuum condition,sequential control method will be adopt to realize mechanical vacuum pump and roots vacuum pump sequence control at vacuum stage;to ensure the stability of the vacuum degree by using Ping pang control method at vacuum stage.Hardware design and software design of high speed dynamic balancing machine control system is adopt Siemens PLC.This paper also designed a high speed dynamic balance testing system to achieved vibration speed and displacement measurement and gain modifier based on these two parameters to adjust rotor by high speed dynamic balancing.