Time filter

Source Type

Zhao-Xia H.,China University of Technology | Zhao-Xia H.,Jiangsu Huatong Kinetics Co. | Qing-Tao L.,China University of Technology | Le-Hao C.,Northwestern Polytechnical University
Sensors and Transducers | Year: 2014

A dynamics model of vibration screen for asphalt mixing equipment is established in order to investigate the working performance of the system, which combines the lumped parameter method and substructure method in this paper. In order to acquire accurate results, the spring support stiffness, bearing stiffness and torsional stiffness of connecting link are considered in this model. The mass and stiffness matrixes of link are transformed to the master nodes according to the substructure method. Then the part is combined with the whole dynamics model by support points. Furthermore, the differential equations of motion are given by the Newton Second Law, and it is solved by Newmark time integration method. The centroid trajectory of vibrating screen is computed. At the same time, the reaction force of support springs and bearings are also acquired. And the strength of the product can meet the requirements of design by simulations. A vibration experiment is executed in factory, and the dynamics model is validated by comparing the results. © 2014 IFSA Publishing, S. L. Source

He Z.,Changan University | He Z.,Jiangsu Huatong Kinetics Co. | Chang L.,Northwestern Polytechnical University | Liu L.,Northwestern Polytechnical University
Sensors and Transducers | Year: 2013

An approach to analyze the effects of different factors on gear dynamic behavior is presented by means of vibration influence chart. Considering the high contact ratio and heavy load characteristics of herringbone planetary gear train, a translational-rotational coupled dynamic model for an encased differential herringbone planetary gear train is developed using lumped mass method. The principles and methods to draw the influence chart are given and the specific steps for HPGT are discussed in detail. The optimal matches between the mean value and fluctuation of mesh stiffness, rotating speed are obtained using the vibration influence charts. The good design regions for vibration are evidently presented in figures, which is significant to parameters design of herringbone planetary gear systems. © 2013 IFSA Publishing. All rights reserved. Source

Dong Z.-H.,Changan University | Ni F.-Y.,Changan University | Liu S.-M.,Changan University | Liu X.,Jiangsu Huatong Kinetics Co.
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2014

To determine the reasonable grade and grade length, a dynamic heavy truck model was set up, which could be suitable to the characteristics of steep and long longitudinal slope. The tire and suspension could bear forces not only in the vertical direction but also in the horizontal direction along slope. With consideration of the torque characteristics of the engine and the stall conversion relationship of the power transmission system, the speed variation during the heavy truck climbing process was studied. The influences of axle load, entrance speed, grade and grade length on the truck speed were analyzed. The results show that the change of the heavy truck drive torque is quite complex during the climbing process, but the speed is always in decline. If the grade length is long enough, there is always a steady speed. With the increase of grade and axle load, the decline of the speed will be faster, and the steady speed will be lower. The entrance speed has no influence on the steady speed, but with the increase of the entrance speed, the steady length will be longer. Based on the above analysis, the control indicators of grade and grade length are put forward, and then a function model on the relationship between grade and grade length is built up. The results can provide reference for route design of highway in mountain area. Source

Gu H.,Changan University | Xiao C.,Jiangsu Huatong Kinetics Co. | Liu Y.,Jiangsu Huatong Kinetics Co. | Wang F.,Jiangsu Huatong Kinetics Co.
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 | Year: 2011

To make research work reproducible and comparable, enhance efficiency, decrease cost, AMESim (Advanced Modeling and Simulation Environment for Systems engineering) is used in studying cutting speed stability of hydraulic milling machines. One simulation model of hydraulic milling machine is established based on AMESim, and cutting rev characteristic of milling machine is studied when the hydraulic system overflow pressure is set different. The results indicate inertia of engine effects milling drum cutting speed stability significantly, and milling drum cutting rev will fluctuate when the maximum output torque is set on a low level, limited by the overflow pressure setting, as milling hydraulic system overflows frequently under the action of alternating load, and ideal overflow pressure setting should insure the relief valve not overflowing all the normal working status. © 2011 IEEE. Source

Zhaoxia H.,China University of Technology | Zhaoxia H.,Jiangsu Huatong Kinetics Co. | Qingtao L.,China University of Technology | Lehao C.,China University of Technology | Jinsong W.,Jiangsu Huatong Kinetics Co.
Open Mechanical Engineering Journal | Year: 2014

The vibration characteristics of a high-speed planetary gear transmission (PGT) are studied in this paper. A transverse-torsional coupling dynamic model is developed using lumped parameter method. In order to ensure the accuracy of the analysis model, the mesh stiffness, support stiffness and the influence of eccentric masses on system are also considered. By solving the eigenvalue of differential equations of motion, the natural frequencies and mode shapes are calculated. According to the vibration modes of this gear transmission, the characteristics of translational mode and torsional mode are described in details. The influence of mesh stiffness, support stiffness and modal modes are discussed by adopting strain and kinetic energy. © 2014, Zhaoxia et al.; Licensee Bentham Open. Source

Discover hidden collaborations