Coupled Rigid And Flexible Model For Diaphragm Coupling And Research On Shaft Centerline Orbit Under The Misalignment Working Condition

As an important part of motorized spindle rotor system,diaphragm coupling compensates the coupling misalignment and absorbs shock and load.When coupling misalignment appears in the motorized spindle-diaphragm coupling-dynamometer system,diaphragms of the diaphragm coupling will deform to compensate the coupling misalignment,in the same time,additional load is introduced and finally it will affect the motorized spindle.The misalignment in the rotor system will make the shaft centerline orbit of cross section of drive shaft or driven shaft go wrong.The misalignment state can be judged by detecting the orbit.So,it is necessary to study the corresponding orbits under different misalignment states.Based on the reliability test-bed for motorized spindle and theoretical study and modeling analysis on the diaphragm coupling,the orbit for coupling misalignment of diaphragm coupling which connects the motorized spindle and dynamometer system is studied in this dissertation.The study mainly includes coupled rigid and flexible model for diaphragm coupling and shaft centerline orbit under different misalignment working conditions of test-bed.The misalignment of test-bed will limit the rotating speed of rotor system,while misalignment is mainly embodied in the diaphragm coupling,so it's necessary to build the model of diaphragm coupling and analyze this model.Among all the characteristic signals which reflect the misalignment state of rotor system,shaft centerline orbit is studied extensively because it's easy to obtain and used widely.To detect the misalignment state of test-bed,the orbit is studied in this dissertation.Based on ADAMS and ANSYS,the coupled rigid and flexible model for diaphragm coupling which is adopted in the test-bed is built;on the other hand,the shaft centerline orbit under different misalignment working conditions of test-bed is studied.Main work includes:1)Different kinds of strain generated from deformation of diaphragms in the diaphragm coupling are derived,proceeding from the working principle of diaphragm coupling.2)Different rigid models for diaphragm coupling are built by ADAMS,which lays a foundation for the coupled rigid and flexible model.MNF file is generated by ANSYS and is verified.After replacing the diaphragm in the rigid model with MNF file,the coupled rigid and flexible model is obtained.Finally the internal load of diaphragm is analyzed.3)The centering performance detecting and analyzing platform is built based on Lab VIEW and Matlab.It can filter and denoise history data or the data collected in real time.It is also used to generate shaft centerline orbit,which realized the online detecting.4)Angular misalignment and radial misalignment experiments under no loading or loading condition are conducted,by which the shaft centerline orbits are analyzed and studied,which lays a foundation for misalignment warning of rotor system.The coupled rigid and flexible model for diaphragm coupling based on ADAMS lays a foundation for the ADAMS model building on rotor system.The centering performance detecting and analyzing platform has strong practicability and is able to conduct the pretreatment for data when detecting the misalignment state,in the end the shaft centerline orbit is obtained.The misalignment experiments conducted finally is combined with the detecting platform,which analyzes the orbit,all of these work offers technical support for the fault diagnosing and pre-warning of rotor system.