Abstract
A new hydraulic chassis of rice transplanter is designed based on the paddy machinery operation requirements. Driving system adopts single pump four-motor scheme, and the anti-slide valve group is used to prevent the slippage of the shunt-wound hydraulic motors. Hydraulic steering system adopts single-way stable diverter valve for ensuring its response in time. Then, hydraulic system and components parameters are designed and calculated. The driving resistance and average slip rate are measured in paddy field. The experimental data verifies the correctness of theoretical calculation. The designed hydraulic driving system and steering system are simulated in AMESim. The simulated data, including pressure, flow, and torque, basically conform to the design requirement. The results verify the feasibility and reliability of chassis hydraulic scheme. The proposed design scheme may be extended to other vehicles for improving chassis performance.
Highlights
In 2015, the rice planting area in China is about 30 million hectares, which accounts for 30% of China’s grain crop area and 20% of the world’s rice planting area.[1,2] Nearly 200 billion kilograms of rice is produced every year
The running resistance and average slip rate are measured in paddy field and the experimental data verifies the correctness of theoretical calculation
The hydraulic driving system and steering system are simulated in AMESim and the simulated results verify the feasibility and reliability of chassis hydraulic scheme
Summary
In 2015, the rice planting area in China is about 30 million hectares, which accounts for 30% of China’s grain crop area and 20% of the world’s rice planting area.[1,2] Nearly 200 billion kilograms of rice is produced every year. Advances in Mechanical Engineering conducted the measurement and analysis of steering radius of high-speed rice transplanter on different grounds.[9] But almost the research of rice transplanters is traditional machinery chassis which can basically meet the requirements of paddy field work. Low-speed high-load working model is walking on the paddy field with transplanting operations and its maximum speed is 1.5 m/s This hydraulic system can change walking speed and amplify speed variation range by input or output adjustment. The calculation results show that the maximum driving resistance is 4880 N when the rice transplanter is walking on the paddy field. In order to calculate hydraulic system flow, the average slip ratio of rice transplanter in paddy field needs to be measured. The theoretical walking distance of rear wheel rotation 10 laps is calculated, and the actual walking distance is measured by meter ruler
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