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Shi R.,China University of Mining and Technology | Zhao J.,China University of Mining and Technology | Sun H.,Jiangsu Xuzhou Construction Machinery Research Institute
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

According to the operating characteristics of wheel loaders, the energy distribution and saving potential of loader were researched through calculation and simulation. Combing the characteristics of hydraulic hybrid system, the parallel configuration of hydraulic hybrid wheel loader was presented, and the influencing factors for hydraulic hybrid wheel loader energy-saving potential were analyzed. Finally, the key parameters were optimized. The results show that optimization of hydraulic hybrid power system, selection of the appropriate parameters in control strategy, recovering the braking energy and long slope potential energy of loaders are helpful to improve the energy saving effect of hydraulic hybrid loader.


Li J.,Tianjin University | Wang P.,Tianjin University | Chen X.-C.,Jiangsu Xuzhou Construction Machinery Research Institute | Yang T.-J.,Tianjin University
International Journal of Advanced Manufacturing Technology | Year: 2015

Preliminary study on slicing technology and design theory of slicing cutter shows that there is deviation between the machined tooth surface and the theoretical tooth surface, called theoretical machining error. This deviation is affected by cutter parameters and machining parameters. To improve machining accuracy, a suitable combination of parameters should be ascertained. On the other hand, interference between major flank face of the cutter and machined tooth surface of the workpiece could occur with inappropriate parameters. In addition, the constraint conditions of enough addendum thickness and no top cut also raise a claim to parameter optimization. For this purpose, the mathematical model of theoretical machining error is built. The judgment method of interference is proposed. The mathematical discriminants of enough addendum thickness and no top cut are presented. On this basis, the selectable ranges of parameters are determined by the constraint conditions. Then, orthogonal experiment is carried out to select an optimal combination of parameters by analyzing the theoretical machining error. Machining experiment is performed with the selected parameters. The results prove that the proposed optimal selection method is effective and applicable. © 2015 Springer-Verlag London


Yang Z.,Jiangsu Xuzhou Construction Machinery Research Institute | Du J.,Yanshan University | Wen B.,Yanshan University | Hu C.,Jiangsu Xuzhou Construction Machinery Research Institute | And 2 more authors.
Intermetallics | Year: 2013

First principles calculations have been performed to study the structural, heats of formation, elastic properties, and densities of states of eight Mg-AE (AE = Ca, Sr, Ba) intermetallic compounds. The obtained results indicate that with increasing atom weight and concentration of AE, the bulk moduli decrease monotonously, and the larger the electronegativity difference is, the smaller the elastic modulus would be. Based on the ratios of shear moduli to bulk moduli, it has been found that Mg 2Ca, Mg 38Sr 9, Mg 2Sr, Mg 17Ba 2 and Mg 23Ba 6 behave in a brittle manner, and Mg 17Sr 2, Mg 23Sr 6 and Mg 2Ba behave in a ductile manner. Our calculations of the densities of states, heats of formation, and elastic constants of all the eight Mg compounds indicate that they are all conductors, thermodynamically and mechanically stable. © 2012 Elsevier Ltd. All rights reserved.


Yang Z.,Jiangsu Xuzhou Construction Machinery Research Institute | Shi D.,East China University of Technology | Wen B.,Yanshan University | Melnik R.,Wilfrid Laurier University
Journal of Alloys and Compounds | Year: 2012

Structural, elastic and electronic properties, as well as heats of formation, of seven Ca-Zn intermetallic compounds have been studied by using first principles methods. It was found that with increasing Zn concentration, the bulk moduli and shear moduli of Ca-Zn intermetallic compounds increase monotonically. Our results also indicate that Ca 3Zn, Ca 5Zn 3, and CaZn are ductile, while CaZn 2, CaZn 5, CaZn 11, and CaZn 13 are brittle. Furthermore, calculations of the electronic properties and heats of formation indicate that seven Ca-Zn intermetallic compounds, considered in this work, are all conductors and thermodynamically stable. © 2012 Elsevier B.V.


Jin C.,Shenyang Ligong University | Zhu M.,JiangSu XuZhou Construction Machinery Research Institute
Key Engineering Materials | Year: 2014

Micro turn-milling has superiority on the productivity and the quality of work pieces, and is more suitable to machine micro-shaft parts and desirable miniature parts based on the turn-milling technology. On the basis of ADAMS and UG software, kinematics simulation of complete machine has been performed, meanwhile, the natural frequency and vibration mode of micro turn-milling machine tool has been analyzed by adoption of modal analysis in this paper. The results forecasts dynamic characteristics of micro turn-milling machine tool. It also provides important reference frame of dynamic optimization design of micro turn-milling machine tool. © (2014) Trans Tech Publications.


Hui S.,Jiangsu Xuzhou Construction Machinery Research Institute
Engineering Applications of Artificial Intelligence | Year: 2010

Along with the shortage of energy and the increasingly serious pollution of environment in cities, automobile industries all over the world are exploring and developing energy saving and clean automobile. Hydraulic hybrid vehicle has better potential in medium-size and large-size passenger vehicles than its electric counterparts. The key components' sizes have remarkable influence on the vehicle performance and fuel economy, and an optimization process is needed to find the best design parameters for maximum fuel economy while satisfying the vehicle performance constraints. Multi-Objective optimization method based on adaptive simulated annealing genetic algorithm (ASAGA) is proposed to optimize the key components in HHV. In the objective function of the optimization, all the weighting factors can be set with different values according to different requirements. The optimal results show that the proposed method effectively distinguishes the key components' optimal parameters' position of HHV, enhances the performance and fuel consumption. © 2009 Elsevier Ltd. All rights reserved.


Yang Z.,Jiangsu Xuzhou Construction Machinery Research Institute | Hu C.,Jiangsu Xuzhou Construction Machinery Research Institute | Meng Q.,Jiangsu Xuzhou Construction Machinery Research Institute
Indian Journal of Physics | Year: 2012

Nonequilibrium Green's function techniques are today a vital tool for investigating electrical properties of nanoscale materials. In this review paper, recent works addressed on comprehend nanomaterials have been reviewed. A brief description of the theoretical basis of nonequilibrium Green's function and its application in deducing the current formula for a two probe model are given. Applications of nonequilibrium Green's functions in hunting electronic transport properties of nanoscale materials have been presented. A short conclusion and prospects on two probe model calculations are discussed. © 2012 IACS.


Hui S.,Jiangsu Xuzhou Construction Machinery Research Institute | Lifu Y.,Jiangsu Xuzhou Construction Machinery Research Institute | Junqing J.,Jiangsu Xuzhou Construction Machinery Research Institute | Yanling L.,Jiangsu Xuzhou Construction Machinery Research Institute
Energy Conversion and Management | Year: 2011

Energy consumption and exhaust emissions of hybrid vehicles strongly depend on the energy storage source and the applied control strategy. Heavy vehicles have the characteristics of frequent starts/stops and significant amounts of braking energy, which needs to find a more efficient way to store and use the high power flow. A novel parallel hybrid vehicles configuration consisting of hydraulic/electric synergy system is proposed to overcome the existing drawbacks of single energy storage source in heavy hybrid vehicles. A control strategy combining a logic threshold approach and key parameters optimization algorithm is developed to achieve acceptable vehicle performance while simultaneously maximizing engine fuel economy and maintaining the battery state of charge in its rational operation range at all times. The experimental and simulation results illustrate the potential of the proposed control strategy in terms of fuel economy and in keeping the deviations of SOC at high efficiency range. © 2010 Elsevier Ltd. All rights reserved.


Hui S.,Jiangsu Xuzhou Construction Machinery Research Institute | Junqing J.,Jiangsu Xuzhou Construction Machinery Research Institute
Automation in Construction | Year: 2010

Aimed at the frequent starts/stops operation characteristics of the loader, an energy saving scheme with parallel hydraulic hybrid system is proposed to regenerate and reuse the braking energy normally lost in a conventional loader. Hydraulic hybrid system is designed and sized to capture braking energy from normal-moderate braking operating modes while ensures hybrid system working in higher efficiency region. According to the higher power density characteristic of hydraulic hybrid system, the regenerative braking strategy and energy reuse strategy are designed to coordinate all the powertrain components in an optimal manner while satisfying performance constraints of loader. Energy controller using logic threshold approach is built up to control the dynamic transitions among the various operation modes. Simulation and experimental results show the parallel hydraulic hybrid loader (PHHL) effectively recovered and reused the braking energy, improved the working performance of loader and effectively reduced the fuel consumption. © 2009 Elsevier B.V. All rights reserved.


Hui S.,Jiangsu Xuzhou Construction Machinery Research Institute | Lifu Y.,Jiangsu Xuzhou Construction Machinery Research Institute | Junqing J.,Jiangsu Xuzhou Construction Machinery Research Institute
Energy | Year: 2010

Energy storage source is one of the key factors constraining the development of hybrid drive technology. Single energy storage source is difficult to satisfy the hybrid vehicle's requirements for both energy density and power density. This paper presents a hydraulic/electric synergy system (HESS) for heavy hybrid vehicles to overcome the existing drawbacks of single energy storage source. The key components in the synergy system are sized to improve the fuel economy potential while satisfying the vehicle performance constraints. In order to achieve optimal fuel economy, energy control strategy tailored specially to the synergy system is designed to manage the power distribution between multiple energy sources based on theirs characteristics. The experiments and simulations demonstrate that the proposed synergy system can provide good fuel economy and overall system efficiency. © 2010 Elsevier Ltd.

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