Vibration Analysis And Balance Optimization Of Cylinder Mechanism Of Comber

Cylinder mechanism of comber is the core carding component.In order to achieve high quality and efficient carding,the cylinder carding camber is enlarged on the new combing,namely 110 or 130 degrees cylinder carding.To improve the motion fit between cylinder and separator roller,cylinder was changed from constant speed to variable speed.When the center of mass of cylinder mechanism is not in the center of rotation of cylinder axis,the variable speed cylinder mechanism will produce a large inertia force,which will cause the comber vibration.When the production speed of the comber increases,the vibration generated by the variable-speed carding increases,which not only causes the change of the distance between cylinder and pliers,but also deteriorates the quality of cylinder carding.Moreover,the increase of vibration will aggravate the wear of cylinder parts and reduce its service life.According to the kinematic and vibration characteristics of the cylinder mechanism of the existing comber,the balance optimization is carried out to reduce the cylinder mechanism vibration and improve the quality of the cotton mesh.By the three-dimensional modeling software Solidworks,the overall modeling of the 90°cylinder mechanism and the 110°cylinder mechanism is assembled into an assembly.The kinematics and dynamics simulation analysis software Adams is used to carry out the parts of the cylinder mechanism and the cylinder mechanism as a whole Kinematics analysis to study the displacement change law,speed change law,acceleration change law and inertia force change law of the center of mass of each part of the monocular cylinder mechanism and the total center of mass of the mechanism The linear independent vector method and the mass-acceleration method were used to balance and optimize the 110° cylinder mechanism to determine the optimal cylinder balance scheme.A new cylinder balance system was designed and developed to compare the changes in the inertial force of the cylinder mechanism before and after optimization law.Finally,the vibration detector was used to test the vibration displacement,vibration speed and vibration acceleration of the cylinder mechanism before and after optimization.The research results show that: Within a working cycle of the combing machine,the change law of the total inertial force of the 90°and 110°cylinder mechanism is similar,but the total inertial force of the 110°cylinder mechanism is much greater than that of the 90°cylinder mechanism.It is necessary to balance the 110°cylinder mechanism.The change rules of inertial force of various parts of cylinder in a working cycle are different.The inertial force generated by connecting plate and cylinder body is the largest,which is the main source of vibration of the entire cylinder mechanism.The higher the speed of the combing machine,the greater the vibration displacement,vibration speed,vibration acceleration and vibration inertia force of the parts of the cylinder mechanism and the cylinder mechanism.When the speed of the comber was increased from 300 nippers/min to 600 nippers/min,the maximum inertial force of the 110°cylinder mechanism increased from 46.56 N to186.26 N.A comparative experiment is performed on the 110 ° cylinder balance mechanism.Compared with the original balance mechanism,the 110°cylinder uses a new balance mechanism.When the speed of the combing machine is 500 nippers/min,the cylinder mechanism vibrates.The average displacement is reduced by 18.62%,and the vibration optimization effect of the cylinder mechanism is obvious.