Design of potato connecting and conveying mechanism for 4UZL-1 type sweet potato combine harvester

Shen Haiyang; Wang Bing; Hu Lianglong; Wang Gongpu; Ji Longlong; Shen Gongwei; Wu Teng

doi:10.11975/j.issn.1002-6819.2020.17.002

Volume 36 Issue 17

Aug. 2020

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2020 > 36(17): 9-17. > DOI: 10.11975/j.issn.1002-6819.2020.17.002

Shen Haiyang, Wang Bing, Hu Lianglong, Wang Gongpu, Ji Longlong, Shen Gongwei, Wu Teng. Design of potato connecting and conveying mechanism for 4UZL-1 type sweet potato combine harvester[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2020, 36(17): 9-17. DOI: 10.11975/j.issn.1002-6819.2020.17.002

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Design of potato connecting and conveying mechanism for 4UZL-1 type sweet potato combine harvester

1.
Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China
2.
School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China

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Received Date: May 04, 2020
Revised Date: August 30, 2020
Published Date: August 31, 2020

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Abstract

Abstract

Sweet potato is an important food crop and energy crop. In order to solve the problems of larger loss rate and high damage rate of 4UZL-1 sweet potato combine harvester during the operation process, a potato connection and conveying mechanism was designed based on the analysis of the structure of 4UZL-1 sweet potato combine harvester and characteristics of domestic sweet potato planting models in this paper. The potato connection and conveying mechanism was mainly composed of a depth limiting mechanism, a digging conveying mechanism, an arc grid conveying mechanism and a scraper chain conveying mechanism. The working parameters were obtained through the kinematic and mechanical analysis of the working process of the mechanism. Aiming at the main evaluation indexes of potato damage rate and loss rate during the transfer and transportation, the Box-Benhnken test was presented on the basis of single-factor test. The angle of the digging conveyor, the conveyor angle of the scraper chain, the conveyor speed of the digging and the conveyor speed of the scraper chain were selected as testing factors. The multiple regression model of evaluation index to each factor was established, and the influence of each factor on operation quality was analyzed, and the optimal structure and operation parameters were obtained. The results showed that the order of the significance influence of factors on potato loss rate from large to small was that the conveyor angle of the scraper chain, the conveyor speed of the digging conveyor, the conveyor speed of the scraper chain and the angle of the digging conveyor. The order of the factors influencing on potato damage rate from large to small was the conveyor speed of the digging, the angle of the digging conveyor, the conveyor speed of the scraper chain and the conveyor angle of the scraper chain. When the forward speed of the machine was 1 m/s, the angle of the digging conveyor was 20°, the conveyor angle of the scraper chain was 68°, the conveyor speed of the digging was 1.2 m/s, and the conveyor speed of the scraper chain was 0.67 m/s, respectively, the potato loss rate was 1.12%, and the potato damage rate was 0.94%. Compared with the predicted values, the relative errors were 3.4% and 1.1%, respectively, the results satisfied the performance requirements of the 4UZL-1 sweet potato combine harvester. The study is benefit for the structure improvement and operation parameters optimization of the sweet potato combine harvester.
- agricultural machinery,
- design,
- optimization,
- sweet potato combine harvester,
- connection and conveying mechanism,
- response surface

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References

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