Research And Detection Of Vibration Characteristics Of Transmission Mechanism Of Seamless

The transmission mechanism of seamless underwear machine is prone to loose parts,gear friction,sliding teeth or jumping teeth of synchronous belt due to its complex structure,multiple transmission stages and complex links.These problems will accelerate the damage of various parts of the transmission mechanism and affect the production efficiency of the machine;the most important thing is to produce safety hazards and cause personal injury.Therefore,this paper studies the vibration characteristics of the transmission mechanism of the seamless underwear machine from three aspects: theoretical simulation analysis,experimental analysis and engineering application analysis,so as to detect the running state of the seamless underwear machine from the angle of the vibration characteristics of the transmission mechanism and achieve fault diagnosis.Theoretical simulation analysis.Combined with the relevant parameters of the transmission mechanism of the seamless underwear machine,the composition and movement process of the mechanism are studied;the transmission,simulation and vibration characteristics of key mechanisms are analyzed;study the vibration source of transmission mechanism.It is concluded that the axial direction of motor and helical gear and the direction perpendicular to the movement of synchronous belt can be used as vibration detection positions,which paves the way for the selection of measured points in the experiment.Experimental analysis.Setting up the vibration test platform of the transmission mechanism of the seamless underwear machine,and selecting the motor,the original gear shaft,the large gear mounting plate,the needle cylinder and the Haff plate as the measured points;the vibration signal of the measured point is obtained in real time by the piezoelectric acceleration sensor.The vibration characteristics of the seamless underwear machine under the speed of 10～80r/min,the motor under no-load and load conditions,the five measured points at the same speed and the key transmission mechanism under different needle output modes are analyzed.It is found that the motor movement is more stable under load conditions;different needle delivery modes have little influence on the transmission mechanism,and the vibration of the motor,the vibration of the helical gear axis and the vibration of the synchronous belt perpendicular to the belt movement direction are the main factors that lead to the vibration of the transmission mechanism and even the whole machine.Engineering application analysis.Observing the speed and acceleration spectrum of motor and helical gear of the two fault positions in the X,Y and Z directions when the rotating speed of the whole machine is 50r/min,60r/min,70r/min and 80r/min respectively.It is concluded that the vibration in Y direction is obvious when the motor works normally,and the vibration in Z direction is more obvious when the screw looseness fault occurs;when the helical gear works normally,the vibration in the X direction is obvious.When the speed of the whole machine reaches 75r/min,the vibration in the X direction is obvious,while when the tooth surface wear fault occurs to the helical gear,the vibration in the X direction is obvious.During the operation of the machine,it can directly observe the curve change law of the corresponding spectrum diagram in the PC terminal of the computer,monitor the operation status of the measured position,accurately locate the fault and timely repair it,so as to reduce the damage caused to the machine by bad vibration during the transmission process.Through the above three aspects,the theoretical and experimental analysis of the vibration characteristics of the transmission mechanism of the seamless underwear machine is completed,and the operation of the seamless underwear machine and other textile equipment is tested from the perspective of the vibration characteristics of the transmission mechanism.Using the acceleration sensor to diagnose the fault of the running machine can greatly shorten the maintenance time of workers and improve the service life of the machine.