Decheng Wang

Stimulating effects of magnetized arc plasma of different intensities on the germination of old spinach seeds

Abstract Stimulation with a magnetized arc plasma (MAP) can improve seed germination and seedling growth. This technology has been applied in practice and works well. In this paper, the effects of different MAP intensities on old seeds of Spinacia oleracea L. Beiouzhizun were investigated to determine the optimal conditions for improving germination. The vigor and germination rate were compared between treated and untreated seeds under laboratory conditions. The results show that the vigor and rate were much greater for the treated seeds compared to the untreated ones. The germination vigor increased by 217.6% and the germination rate by 137.2% for a treatment intensity of 2.0xa0A repeated three times. This was the optimum treatment for stimulating potential vigor and promoting seed germination.

Topology optimization of conditioner suspension for mower conditioner considering multiple loads

Abstract The conditioner suspension of the mower conditioner is the most important load-bearing part of the whole machine. In order to reduce the weight of the conditioner suspension, and ensure the sufficient stiffness of the equipment, this paper analyzed and classified the boundary conditions and load cases during the working time. Taking minima of the general flexibility of the conditioner suspension as the objective function, setting volume fraction and modal properties as constraints, optimization of the structural topology of the conditioner suspension design was carried out based on the variable density method. By analyzing the changes in stiffness and natural frequency before and after optimization, contrast to the results shown that the stiffness and dynamics of suspension have greatly improved after being optimized. It shown the effectiveness and feasibility of designing the conditioner suspension of the mower conditioner by using the topology optimization method, and it provides a reference method for technical improvements of similar equipment. It was indicated that the topology optimization method used for the design of conditioner suspension was effective and feasible, which provided a reference method for technical improvements of similar equipment.

Fatigue life simulation of rotary tiller blades synthetic using experimental and finite elements analysis tools

Rotary tiller blades are usually required to achieve the performances of more efficient and longer lifetime. Shapes and processing techniques play a key role in their fatigue life. A Simulation model and data of field experiments were conducted to use are used synthetically for on the evaluation of fatigue life, which is related with the geometric features of rotary tiller blades and their working conditions. In simulation model, the weakest section of rotary tiller blade was identified by the finite element method with ANSYS software. The weakest section was loaded by statistical random load spectrum using severe conditions in the working environment including sandy soil and clayey soil. The modal analysis method was adopted in studying dynamic effects. Fatigue analysis methods (S–N curves, rain flow counting and mean stress theory) were used to determine the fatigue damage imposed on the components. The simulation model analyzed the fatigue sensitivity of input parameters to obtain a discrete fatigue life, and important factors affecting the fatigue life. The comparisons between rain flow matrix and damage matrix reveal corresponding relationship between loading cycle and fatigue damage. Based on these, cumulative fatigue damage was calculated by the software (ANSYS Workbench) according to linear damage theory, and the fatigue damage was evaluated. The predictions were based on linear elastic fracture mechanics theories combined with the finite element method. The results indicated that it can be used to anti-fatigue design of rotary tiller blades in the designing stage of product, and provide technical support for further optimization and evaluation of rotary tiller blades.

Stimulating Effect of Low-Temperature Plasma on Seed Germination Characteristics of Trifolium repens

The low temperature plasma (LTP) technology a new technology, uses for pre-sowing treatments. In this research work we used the new LTP technology equipment “low-temperature plasma modified instrument” and applied different doses in LTP technology to explore its effect on seed germination and other related characteristics on Trifolium repens crop seeds. The seed germination, germination vigor, plant fresh weight, plant dry weight, plant height and root length were significantly affected by LTP doses. The maximum seed germination (73.75%) recorded at LTP 120W treatment followed by 72% at 160W. In addition early germination was observed on same treatment, while minimum seed germination was recorded at 140 Watts LTP treatment. Maximum plant height (8.16mm) at 160W and maximum root length (74.14mm) was recorded at 180W followed by root length (73.89mm) at 160W. From our present work results, it is concluded that low temperature plasma dose 160W is an optimum dose to get high germination rate and healthy seedlings of Trifolium repens crop seeds.

Effect of Low-Temperature Plasma on Forage Maize ( Zea mays Linn .) Seeds Germination and Characters of the Seedlings

Low-temperature plasma is a high-energy state of the material gathered. Plasma seed processing technology is the use of high energy aggregation on treating crop seeds within 20 seconds. Previous research elucidated that this technology could improve germination and seedling growth of welsh onion seeds. In this paper, the effects of different intensities of low-temperature plasma on forage maize seeds have been investigated. The vigor and rate of germination, length of root and shoot of seedlings, the green and dry weight, and the fiber root number of seedlings of the treated sample seeds were compared with those of untreated seeds. The results showed substantial changes in the vigor and rate of germination just like what we found in welsh onion seeds. Thus, the characters of seedlings change regularly with the intensity of low-temperature plasma, and the analysis indicated that 120W was the optimum treatment. Results showed that low-temperature plasma was effective in improving seedling growth, we believe it will be also effective in earlier flowering and maturity and higher yield. There is a great value of using and spreading on production.

Kinematics Simulation and Analysis of Planet Gear Mechanism Based on Cero and ADAMS

Abstract. Planet gear mechanism can transform rotary motion into reciprocating linear motion with high efficiency, high accuracy, stability, and reliability. Its application in combine harvester cutter can improve cutting performance significantly and reduce harvest losses of the cutting process. This paper builds the parametric 3D model of the planet gear mechanism for realizing automatism modeling of variable basic parameters with Creo software. Using virtual prototype technology, this paper imports the model into ADAMS software and implements kinematic simulation analysis, getting the characteristic curve of key moving components displacement, velocity, and acceleration. The results can provide effective parameters and helps for design of the planet gear mechanism and its application on the combine harvester cutter.

Modeling Design and Application of Low-Temperature Plasma Treatment Test Stand for Seeds before Sowing

Stimulation with a low-temperature plasma (LTP) can improve the seed germination and seed adaptability to the environment. This technology has been applied in practice, but the study level of mechanism involved is still limited. Moreover, the treatment devices in using are quite simple. The paper focuses on the modeling design and application of the LTP treatment test stand for seeds before sowing. Numerous experimental LTP treatment on crop seeds and forage grass seeds will be conducted to find out the optimal dose used in the treatment. Another advanced method of this modeling is data collecting and intelligent monitoring system designed in, therefore all key process parameters can be under control during treatment period. At the same time, the modeling design will provide technical support for large-scale manufacturing of seed treatment devices.

Experimental Study on Cutting and Chopping Corn Straw with Different Moisture Content

The corn straws processed by chopping machine could increase diet digestibility and utilization. At present, the most of cutting and chopping machine were small in China, which cannot satisfy the requirement of production due to their high power consumption and low productivity. In order to evaluate the effects of structure parameters of chopping machine on power and the broken rate of straws, experiments were conducted in a device which was designed for cutting and chopping corn straw. Variables in this study included cutting edge shape(A), feed speed(B), number of hammers(C) and rotor speed(D), the broken rate of straws and energy consumption were chose as evaluation index, and the samples are corn straws with different moisture content (56%~60% and 73%~77%). The orthogonal test method was used in this experiment to get the similar results as the completely randomized experiments. This study would provide some advices to design corn straw cutting and chopping machine with high performance.

Influence of Compression Platen on Specific Energy of Bale Recompressing

Hay bale made by small square baler has a low bulk density ranging from 100 to 180 kg/m3 depending on the grass species and moisture content. Recompression can increase bale density to 400-500 kg/m3, helping reduce storage space and freight rates largely. However, high energy consumption is becoming a main obstacle for producing high-density hay bales. The objective of this research was to determine the specific energy requirements for the recompression of wheat straw bales, when subjected to different types of compression platens.

Structural Optimization and Modal Analysis for the Framework of Herbage Cutting and Chopping Machine

Abstract:With the fast development of stockbreeding, the demand for herbage is increasing year by year. The herbage cutting and chopping machine is designed to improve the utilization rate of herbage. Since the framework of the machine is the non-working part, for the purpose of reducing the cost, its necessary to simplify its structure on the premise of satisfying the strength requirement and avoiding possible resonance. In this paper, we introduce a herbage cutting and chopping machine, the framework structure of which need to be optimized. Firstly, the frame is analyzed by ANSYS. Through modal analysis, we obtain the critical speed that can lead to the possible resonance. According to analysis results, we optimize the frame’s structure, which improves the stress state, simplifies the structure and avoids the possible resonance. This work provides reliable theoretical basis for the design and improvement of the framework.