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Yu X.,Harbin University of Science and Technology | Wang Z.,Harbin University of Science and Technology | Meng X.,Heilongjiang Polytechnic | Li H.,Harbin University of Science and Technology | And 6 more authors.
International Journal of Control and Automation | Year: 2014

In order to solve the loading capacity of the hydrostatic thrust bearing, a numerical simulation concerning dynamic pressure of multi-pad hydrostatic thrust bearing under the different recess depth and rotating velocity is been described. Three-dimensional dynamic pressure field of gap fluid between the rotational worktable and the base has been simulated by using the Computational Fluid Dynamics. This study theoretically researches the influence of recess depth and rotating velocity on dynamic pressure of the bearing according to the lubricating theory and Finite Volume Method, and the simulation results indicate that an improved characteristic will be affected by recess depth and rotating velocity easily. Through this method, the optimal loading capacity of such products can be achieved. © 2014 SERSC. Source


Yu X.-D.,Harbin University of Science and Technology | Wu B.,Harbin University of Science and Technology | Shao J.-P.,Harbin University of Science and Technology | Zhang Y.-Q.,Harbin University of Science and Technology | Shi Z.-M.,Qiqihar Heavy CNC Equipment Corporation Ltd
Key Engineering Materials | Year: 2010

In order to solve the thermal deformation of the hydrostatic thrust bearing in the heavy equipment, a simulation research concerning temperature field of multi-pad hydrostatic thrust bearing having circular cavities was described. The Finite Volume Method of Fluent has been used to compute three-dimensional temperature field of gap fluid between the rotation worktable and base. This study theoretically analyzes the influence of cavity radius and cavity depth on the bearing temperature performance according to computational fluid dynamics and lubricating theory. It has revealed its temperature distribution law. The simulation results indicate that an improved characteristic can be gotten from a circular cavity hydrostatic thrust bearing, oil cavity temperature decreases by gradually with cavity radius enhancing, oil cavity temperature decreases by gradually with cavity depth. Through this method, the safety of a hydrostatic thrust bearing having circular cavities multi-pad can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design and lubrication and experience and thermal deformation computation for hydrostatic thrust bearing in the heavy equipment. Source


Qin B.,Harbin University of Science and Technology | Zhang B.,Harbin University of Science and Technology | Ni Y.,Qiqihar Heavy CNC Equipment Corporation Ltd | Han G.,Harbin University of Science and Technology | And 2 more authors.
Advanced Science Letters | Year: 2011

Dynamical vibration absorption technique is adopted to increase the dynamic stiffness of a lathe tool with large length to diameter ratio. According to dynamical vibration absorption construction and tail clamp form of lathe tool, multi flexible body dynamical model of the vibration absorption system is built up by using the software of ADAMS and ANSYS. And the amplitude-frequency characteristic of a lathe tool is obtained by simulation. The actual amplitude-frequency characteristic of a lathe tool is analyzed by using SA-78 2ch FFT analyzer. Through the analysis of simulation results and experimental data, the accuracy of the model is validated. Aiming at reducing the peak value of frequency response, the vibration absorption system has been simulated, optimized and analyzed, and the result of study demonstrates that the anti-vibration property of the system is improved greatly. Based on the optimization of system, it is discussed that the influence of the dimensions of vibration absorption cavity and the mass center position of mass block on the vibration absorption performance of lathe tool. This offers the design considerations about the structure of the lathe tool with large length to diameter ratio. © 2011 American Scientific Publishers All rights reserved. Source


Yu X.-D.,Harbin University of Science and Technology | Meng X.-L.,Heilongjiang Polytechnic | Li H.-H.,Harbin University of Science and Technology | Tan L.,Harbin University of Science and Technology | And 4 more authors.
Journal of Donghua University (English Edition) | Year: 2013

In order to solve the deformation of the hydrostatic thrust bearing with multi-pad annular recess in the heavy computer numerical control (CNC) equipment, the simulation concerning pressure field of hydrostatic thrust bearing with multi-pad annular recesses was carried out. The finite volume method of computational fluid dynamics (CFD) was used to compute the three-dimensional pressure field of gap fluid between the rotary worktable and the base. The influence of the rotational speed on the bearing pressure performance was studied based on CFD and lubrication theory, and the method revealed the pressure distribution law. The results qualitatively agree well with the experimental data. The results indicate that the oil cavity pressure decreases gradually with rotational speed enhancing. The reliability of a hydrostatic thrust bearing with multi-pad annular recess can be predicted through this method, and the optimal design of such products can be achieved, and the numerical simulation method can provide reasonable data for design, lubrication, experiment, and deformation computation of hydrostatic thrust bearing in the heavy CNC equipment. Copyright © 2013 Editorial Department of Journal of Donghua University. Source


Wang Y.P.,Harbin University of Science and Technology | Gao L.,Harbin University of Science and Technology | Shi Z.M.,Qiqihar Heavy CNC Equipment Corporation Ltd | Bi K.X.,Harbin University of Science and Technology | Ge J.H.,Harbin University of Science and Technology
International Journal of Smart Home | Year: 2014

Enterprises to achieve global optimization and better diversification and personalized product production scheduling, from the unity of the tasks and resources manufacturing, based on the perspective of global optimization in production scheduling method. With global production scheduling of matching and process model resources as the foundation for the realization of enterprise process production scheduling optimization and level continue working process decoupling point, this paper manufacturing task and manufacturing process is divided into generalization and differential theory , applications from manufacturing process optimization results obtained path, based on the manufacturing process optimization mathematical model to study the production scheduling, and by using the improved genetic algorithm, and finally for example. Above scheduling method simplified the scheduling process, reduce the scheduling of difficulty, shorten the time scheduling, and finally achieve enterprise resource efficient use. © 2014 SERSC. Source

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