Sany Heavy Machinery Co

Kunshan, China

Sany Heavy Machinery Co

Kunshan, China
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Du J.,Wuhan University of Technology | Qian Z.,Wuhan University of Technology | Zhao J.,SANY Heavy Machinery Co.
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings | Year: 2011

A single crankshaft of 8L250 diesel engine using a finite element model is established, which used Pro-E and ANSYS-workbench software in this paper, and a finite element analysis is done in force and displacement boundary conditions. The maximum stress point is found, and under the premise of not affecting the basic structure of the crankshaft the optimization improvements to reduce the stress concentration are presented, and the specific methods for quantitative analysis are executed so that the crankshaft will achieve to the best result of optimization. © 2011 IEEE.


Yao Z.,Wuhan University of Technology | Qian Z.,Wuhan University of Technology | Wang J.,SANY Heavy Machinery Co.
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings | Year: 2011

In this paper, the energy balance analysis of diesel engine system is introduced, and a medium-speed diesel engine was used as a research object to build simulation models. The correctness of model was verified by comparing simulation data to experimental result. The energy balance on thermodynamic cycle is analyzed by combining the results of simulation data and theoretical analysis to evaluate the energy efficiency of this diesel engine. Factors of energy efficiency are pointed out by theoretical analysis, and the result of the research on effects caused by changes of parameters is been used to pointing out the path of improving the energy efficiency of diesel engines. © 2011 IEEE.


Jia W.,Nanjing University of Technology | Yin C.,Nanjing University of Technology | Dai Q.,Sany Heavy Machinery Co | Chen J.,Sany Heavy Machinery Co
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2010

The manufacture and the fabrication may cause inevitable geometric and coaxially errors. The influences on the mechanical characters of the spool valve may appear due to the radial clearance. Based on the analysis of the Poiseuille flow and the Couette flow of the clearance, the Newtonian fluid is assumed to flow through the valve orifices, a second-order non-linear differential equation is derived to describe the process, the conclusion is reached that the contribution of the Couette flow always makes the spool motion stable, while friction caused by Poiseuille flow may have positive or negative resistance. Finally, the simulation and the experiment indicate that, the larger the eccentric and the clearance are, the more unstable the movement of spool valve become.


Zeng Y.,Hefei University of Technology | Geng S.,Hefei University of Technology | Feng L.,Hefei University of Technology | Zhou B.,Sany Heavy Machinery Co.
Proceedings of 2015 International Conference on Fluid Power and Mechatronics, FPM 2015 | Year: 2015

This paper introduces application and hydraulic system's working principle of the Multi-DOF hydraulic arm, adopts the power bond graph to establish the mathematical model of the hydraulic system, and uses the Matlab software to draw the Bode diagram of the open-loop system. The stability and other time domain performance of the hydraulic system are analyzed by using the engineering control theory, the results show that, on the premise of guaranteeing the system stability, the system could obtain good time domain performance, through increasing the open-loop gain coefficient properly. The results of simulation are useful for the design and dynamic analysis of the hydraulic system. © 2015 IEEE.


Qin S.-D.,Jiangsu University | Qin S.-D.,Sany Heavy Machinery Co. | Wang S.-Q.,Jiangsu University | Chen N.-L.,Jiangsu University
Jinshu Rechuli/Heat Treatment of Metals | Year: 2011

Steel-cast iron dry sliding pairs are used on pin-on-disk configuration to study the wear behaviors of gray cast iron, corresponding wear laws are found and the wear mechanisms of gray cast iron under various service conditions are explored using XRD, SEM and EDS means. The results show that with the increase of applied load, the wear rate increases slowly first, then sharply, at last the increase rates become slow under those ambient temperatures tested, however, the average friction coefficient decreases gready at first, then tends to a definite value. At room temperature, adhesive wear and abrasive wear mechanisms are dominant. While at the surrounding temperature of 200 °C, wear mechanism is mainly adhesive wear and mild oxidation wear, however, there will be appearing massive spalling. At the surrounding temperature of 400 °C, the dominant wear mechanism is mild oxidative-wear and abrasive wear when the applied load is small; as the applied load increasing, the wear mechanism turns into severe oxidation-wear and abrasive wear; massive spalling and plastic extrusion will be appeared after the applied load large enough.


Patent
SANY HEAVY MACHINERY Ltd and Shanghai Huaxing Digital Technology Co. | Date: 2012-04-19

An excavator self-detection system comprises a controller, a fuel inlet flow meter, a fuel outlet flow meter and a performance self-detection controller. The fuel inlet flow meter and the fuel outlet flow meter are deployed at a fuel inlet and a fuel outlet of an engine respectively, and are connected to the performance self-detection controller. The performance self-detection controller is connected to the controller. The performance self-detection controller reads the signal values of the fuel inlet flow meter and the fuel outlet flow meter, calculates a fuel consumption value, and reads a machine parameter of the excavator through the controller to determine the performance. A detection method is also provided which uses the above excavator self-detection system. The method comprises performance self-detection, a fuel consumption test, and an efficiency test. The measuring equipment can be set by itself according to different machine types and different communication protocols. The detection device of the present invention aims to the different excavators with different communication protocols setting, therefore it owns strong portability. The condition of people waste is effectively reduced, and by means of the self-detection function, the measurement precision is improved.


Patent
Hunan Sany Intelligent Control Equipment Co. and Sany Heavy Machinery Ltd | Date: 2014-09-17

An intelligent post-treatment and regeneration control method for an engineering machinery engine, comprising an automatically regenerated auxiliary load loading control method and a manually regenerated auxiliary load loading control method; the automatic regeneration auxiliary load loading control method comprises the following steps: when the accumulation of the particles in a diesel particulate filter exceeds a specified standard and the exhaust temperature of the engine is higher than the regeneration required temperature, an engine controller transmits an auxiliary regeneration packet; after receiving the packet, a main controller determines the external environment temperature; the main controller supplies corresponding current for the regeneration electromagnetic valve of the particulate filter according to the obtained external environment temperature and the corresponding relationship between a preset environment temperature and a loading current, so as to obtain a load matching the environment temperature; and the main controller monitors the exhaust temperature at the inlet of the diesel particulate filter catalytic converter to achieve automatic closed-loop control of the regeneration auxiliary loading. The intelligent post-treatment and regeneration control method for the engineering machinery engine selects corresponding load according to the external environment temperature, thus enabling the load loading process to be more intelligent and accurate.


Patent
Sany Heavy Machinery Ltd | Date: 2012-12-04

This present invention discloses an engine-driven generator rotational speed control method. The method comprises the following steps, obtaining n-IA1 curve, n-IA2 curve, n-DCLV curve and DCLV-n curve through the generator open-loop characteristic curve; determining whether the current work area of the generator is the saturation area, the transition area or the linear area, and meanwhile determining the 1.1-times DCLV work area. The present invention adjusts the generator objective rotational speed by determining the state of the generator, and outputs the generator objective rotation rotational speed by the method of dynamic discrete, so as to ensure the responsiveness of the DC output voltage of the generator, to extend the service life of the generator, and to make the generator work in a more efficient state.


Patent
Shanghai Huaxing Digital Technology Co. and Sany Heavy Machinery Ltd | Date: 2014-09-10

A method for heating cooling liquid to start preheating comprising: step 1, supply cooling liquid, which cooling liquid is filled in a circulating water pipe (12); step 2, supply fuel and ignite the fuel to heat the cooling liquid in the circulating water pipe; step 3, connect the circulating water pipe to an engine (1), and the cooling liquid is made to circulate in the circulating water pipe in order to continuously heat the engine; step 4, the exhaust gas generated by fuel combustion is collected and guided to the bottom of the engine for heating same; and step 5, judge the temperature of the engine, and stop burning fuel when the temperature of the engine reaches a threshold value. The method features a low temperature start and a high temperature cut-off with a higher level of safety. Also disclosed is a system of heating cooling liquid to start preheating.

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