Simulation Analysis of the Working Process of the Corn Seed Metering Device with Combination Inner-Cell

2012 ◽  
Vol 215-216 ◽  
pp. 160-167 ◽  
Author(s):  
Qing Long Li ◽  
Ji Yang Yu ◽  
Qiang Qiang Zhang ◽  
Jian Qun Yu ◽  
Hong Fu
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Bench Test ◽  
Particle Model ◽  
Test Results ◽  
Working Process ◽  
Corn Seed ◽  
3D Cad ◽  
Novel Method ◽  
Seed Metering Device

A three-dimensional discrete element method analytic model of the corn seed metering device with combination inner-cell was established based on its 3D CAD model, and the three-dimensional particle model of corn seeds was built by using the method of combination spherical particle. The working process of the corn seed metering device was simulated and analyzed by self-developed three-dimensional CAE software. It was observed that the simulative results of the seeding performance, clearing angles and dropping angles of the corn seeds well agreed with the bench test results. A novel method for studying and designing of the corn seed metering device was put forward.

Design and study of the action of the yarn-pulling mechanism of a carbon-fiber one-sided stitching device based on improved technology

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1372-1384
Author(s):  
Jiuzhi Dong ◽  
Lingchao Ji ◽  
Xin La ◽  
Jingzhao Yang ◽  
Yunjun Chen
Keyword(s):  
Mathematical Model ◽  
Carbon Fiber ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Carbon Composites ◽  
Test Results ◽  
Trajectory Simulation ◽  
Crank Angle ◽  
Relationship Of ◽  
Improved Technology

To realize a one-sided stitching action and stable stitch formation, a poor match between the lead and the hook yarn needles in the stitching process must be avoided as it can lead to hook dropping and hook errors, causing loop loss, thread breaking, and even thread relaxing. Based on an analysis of the principle of one-sided stitching and matching the hook and lead yarn needles, the original stitching technology is improved and a method of trajectory superposition is proposed. A yarn-pulling mechanism is designed for a one-sided stitching device for three-dimensional preformed carbon/carbon composites. By analyzing the principle of the yarn-pulling mechanism, a mathematical model of that mechanism is established, and a trajectory simulation analysis is carried out with MATLAB, which verifies the rationality of the yarn-pulling principle. Results for the two crank angles of the yarn-pulling mechanism and the crank angle of the hook yarn needle at two particular moments reflect the matching relationship of the three, which provides a theoretical reference for the stitching device to adjust to and work well, forming the desired stitch. Finally, stitching tests are carried out, and the test results show the designed yarn-pulling mechanism can cooperate with the hook and the lead yarn needles to complete the stitch lock. This realizes a stable stitching action and avoids hook dropping and hook errors, thereby increasing stitching efficiency.

An Integrated Design and Fabrication Approach for Heterogeneous Objects

2011 ◽  
Vol 383-390 ◽  
pp. 5810-5817 ◽  
Author(s):  
Yu Fang Zhu ◽  
Chen Peng ◽  
Ji Quan Yang ◽  
Chang Ming Wang
Keyword(s):  
Three Dimensional ◽  
Integrated Design ◽  
Working Process ◽  
Stl Model ◽  
Three Dimensional Printing ◽  
Heterogeneous Objects ◽  
New Process ◽  
Novel Method ◽  
Representation Scheme ◽  
Dimensional Printing

A novel method for the design and fabrication of heterogeneous objects is presented, which combines the Three Dimensional Printing (3DP) and micro droplets dispensing technology. It provides a solution to the fabrication of assemblies with multi materials, which can not be fabricated by traditional processes. An integrated design and fabrication system for heterogeneous objects based on the new process is introduced. Its constructive representation scheme is described. To show the effectiveness of the working process of multi-materials, based on slice software of color STL model and developing prototyping system, an example is shown to illustrate the entire design-fabrication cycle for heterogeneous objects.

Two Welding Models Application on Fatigue Analysis for Front Sub-Frame

2011 ◽  
Vol 63-64 ◽  
pp. 431-434
Author(s):  
Jiang Tao Xu ◽  
Rui Xia Guo
Keyword(s):  
Finite Element ◽  
Optimum Design ◽  
Simulation Analysis ◽  
Spot Weld ◽  
Bench Test ◽  
Test Design ◽  
Finite Element Models ◽  
Test Results ◽  
Seam Weld ◽  
Weld Fatigue

This article firstly established two finite element models of seam weld and spot-weld for the front sub-frame, then used the two models for seam weld and spot weld fatigue simulation analysis, next cooperated with bench test results for verification. After the above steps, we not only found the weak portion of the front sub-frame, but also provide reference for both optimum design and improving the bench test design.

Simulation Research of Six-Bar Mechanism for Open and Close

2014 ◽  
Vol 644-650 ◽  
pp. 162-166
Author(s):  
Xu Zhou ◽  
Ying Wu
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Horizontal Displacement ◽  
Working Process ◽  
Simulation Research ◽  
Revolute Joint ◽  
Initial Values ◽  
Vertical Location ◽  
Optimization Parameters ◽  
Set Up

For the purpose of researching the six-bar mechanism for open and close and the improvement and use of the mechanism, improving the work efficiency, the three-dimensional solid model of the mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of the mechanism was achieved. The structure optimization parameters of the mechanism were obtained. The result proves that when the vertical location of the upper endpoint of lid were increased the horizontal displacement of the lower endpoint of lid reduced. When the locations of revolute joint of lower rocker and link, the horizontal location of revolute joint of lower rocker and lid, the opening force acting on the lower endpoint of lid were increased the horizontal displacement of the lower endpoint of lid added. The sensitivities of the horizontal displacement of the lower endpoint of lid on the initial values of the locations of revolute joint of lower rocker and link, the horizontal location of revolute joint of lower rocker and lid, the horizontal location of revolute joint of lower rocker and frame are greater. The sensitivities of the horizontal displacement of the lower endpoint of lid on the initial values of the vertical location of revolute joint of upper rocker and link, the vertical location of the upper endpoint of lid, the opening force acting on the lower endpoint of lid are smaller.

Modeling and Optimization Research of a Planar Six Bar Mechanism

2012 ◽  
Vol 215-216 ◽  
pp. 921-925
Author(s):  
Ying Wu ◽  
Xu Zhou
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Working Process ◽  
Revolute Joint ◽  
Technical Performance ◽  
Revolute Joints ◽  
Vertical Location ◽  
Vertical Speed ◽  
Optimization Parameters ◽  
Set Up

For being convenient for researching the dynamic characteristic and the improvement and use of the planar six bar mechanism, for improving the dynamic technical performance, the three-dimensional solid model of the mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of the mechanism was achieved. The structure optimization parameters of the mechanism were obtained. The result proves that the vertical location of revolute joint of link and rocker, the location of revolute joint of crank and frame, the horizontal locations of two revolute joints of link are almost no impact on the vertical speed of slider. The vertical locations of revolute joint of frame and rocker and revolute joint of block and slider have less impact on the vertical speed and acceleration of slider. The vertical location of revolute joint of link and crank, the horizontal locations of revolute joint of frame and rocker and revolute joint of block and slider have greater impact on the maximum vertical speed and acceleration of slider.

Research on Matching of Main Engine and Turbocharger on Sail-Assisted Ship

2013 ◽  
Vol 291-294 ◽  
pp. 513-517
Author(s):  
Jun Hao Zhao ◽  
Hong Ying Ren ◽  
Lian Zhong Huang
Keyword(s):  
Simulation Model ◽  
Constant Speed ◽  
Bench Test ◽  
Test Results ◽  
Working Process ◽  
Engine Load ◽  
Speed Mode ◽  
Main Engine

To research the matching of main engine and turbocharger on sail-assisted ship, a 76000 deadweight tonnage cargo ship with 5S60MC main engine and TCA66 turbocharger was selected. The simulation model of working process of the engine was established, with AVL BOOST software, and verified by bench test results. Then, the model was used to analyze the matching of main engine and turbocharger, at constant speed mode of the main engine and constant speed mode of the ship. The results show that, the matching of main engine and turbocharger is acceptable, on the selected sail-assisted ship. However, special attentions should be paid to the turbocharger when the engine load is above 85.6% of the rated power at constant speed mode of the ship, to avoid surge of the compressor.

Experimental Research on Belt Type of Precision Seed-Metering Device

2013 ◽  
Vol 712-715 ◽  
pp. 1339-1342
Author(s):  
Duan Yang Geng ◽  
Rui Cheng Du ◽  
Dao Lin Zhang ◽  
Li Dan
Keyword(s):  
Experimental Research ◽  
Work Performance ◽  
Spherical Shape ◽  
Good Work ◽  
Seed Plant ◽  
Working Process ◽  
Corn Seed ◽  
Belt Speed ◽  
Single Seed ◽  
Seed Metering Device

Based on the fact of low single seed plant rate, high seed damaged rate and low seed adaptability for conventional and mechanistic precision seed-metering device, a new belt type of seed-metering device was designed (patent No.20101020638.7). both of the 1/4 spherical shape and its size was first established by analyzing the working process of the seed-metering combination the material character of the tested corn seed, and the structure size 6mmX6mm of the seed scoop of this type of seed-metering was then determined by the frame test in agricultural lab, which was tested to own the good work performance. At last, the working adaptability tests were operated, the conclusion showed that the following character indexes were single seed plant rate 98.6%, repeated plant rate 6.3%, leakage plant rate 0.8% and seed damaged rate 0.05% when the size of seed-scoop is 8mmX12mm and the belt speed is1.05 m/s.

A Study on Static Features of a High-Speed Solenoid Valve Used in Diesel Engine

2012 ◽  
Vol 189 ◽  
pp. 393-397
Author(s):  
Na Chen ◽  
Yan Song Wang ◽  
Hui Guo ◽  
Jie Lei ◽  
Tao Zhang
Keyword(s):  
High Speed ◽  
3D Model ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Theoretical Method ◽  
Solenoid Valve ◽  
Analysis Method ◽  
Working Process ◽  
Electrical Unit ◽  
Ansys Workbench

Based on the Maxwell equation and simulation analysis method, this paper investigates and retains the optimized parameters of a high-speed solenoid valve, which is very important for electrical unit pump (EUP) diesels. According to the electromagnetic theory, firstly, a three-dimensional (3D) model of the solenoid valve is established, and working process of the electromagnets is analyzed by using both the theoretical method and Ansys Workbench software. In view of the electromagnetic force, furthermore, several parameters related to the solenoid valve performance are considered and their effects on solenoid valve are analyzed and discussed. Finally, the optimized parameters are proposed for the analyzed solenoid valve and proved by theoretical equations. The studied approach can be extended to any other field related to the electromagnetic device design.

Dynamics Research of RRR-PRP Planar Six Bar Mechanism

2012 ◽  
Vol 479-481 ◽  
pp. 1530-1534
Author(s):  
Ying Wu
Keyword(s):  
Vertical Velocity ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Structure Optimization ◽  
Solid Model ◽  
Working Process ◽  
End Points ◽  
Technical Performance ◽  
Optimization Parameters ◽  
Set Up

For being convenient for researching the dynamic characteristic and the improvement and use of RRR-PRP planar six bar mechanism, for improving the dynamic technical performance, the three-dimensional solid model of the mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of the mechanism was achieved. The structure optimization parameters of the mechanism were obtained. The result proves that the vertical locations of two end points of rocker are almost no impact on the vertical velocity of slider. The location of block and the horizontal locations of two end points of crank and rocker have less impact on the vertical velocity and acceleration of slider. The vertical locations of two end points of crank have greater impact on the maximum vertical velocity and acceleration of slider.

Research and Simulation of Working Mechanism of Small Shaper

2011 ◽  
Vol 127 ◽  
pp. 202-206
Author(s):  
Ying Wu
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Working Process ◽  
Working Mechanism ◽  
Revolute Joint ◽  
Technical Performance ◽  
Fluctuation Range ◽  
Optimization Parameters ◽  
Ram Speed ◽  
Set Up

For being convenient for researching the dynamic characteristic and the improvement and use of small shaper, for improving the dynamic technical performance, the three-dimensional solid model of working mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of working mechanism was achieved. The structure optimization parameters of working mechanism were obtained. The result proves that the lengths of crank and rocker are almost no impact on the fluctuation range of ram speed. The location of revolute joint between rocker and frame has less impact on the return speed and acceleration of ram. The location of revolute joint between crank and slider impacts greater on the fluctuation range of ram speed.

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