Design and test of an agricultural variable nozzle based on magnetorheological fluid

HUANG Xiaoyu; LAN Yubin; YIN Xuanchun

doi:10.7671/j.issn.1001-411X.201809038

Journal of South China Agricultural University > 2019 > 40(4): 92-99. > DOI: 10.7671/j.issn.1001-411X.201809038

HUANG Xiaoyu, LAN Yubin, YIN Xuanchun. Design and test of an agricultural variable nozzle based on magnetorheological fluid[J]. Journal of South China Agricultural University, 2019, 40(4): 92-99. DOI: 10.7671/j.issn.1001-411X.201809038

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Design and test of an agricultural variable nozzle based on magnetorheological fluid

National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology/ College of Engineering, South China Agricultural University, Guangzhou 510642, China

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Received Date: September 24, 2018
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
To design an agricultural variable nozzle based on magnetorheological fluid, and realize variable spraying in agricultural protection area.

Method
Mechanical structure of the variable nozzle was designed based on the theory of magnetorheological effect. Structural parameters were optimized through software simulation. Nozzle flow rate was measured under different coil voltage and volume of magnetorheological fluid injected in the nozzle cavity. Effect of coil voltage and volume of magnetorheological fluid injected in the nozzle on flow rate were analyzed.

Result
When the pressure of the diaphragm pump kept at 0.3 MPa constantly, the nozzle flow rate decreased with the volume of magnetorheological fluid in the nozzle cavity increased from 0 to 2.5 mL. The reduction in flow rate was the least (14.29%) at the coil voltage of 24 V, while the reduction in flow rate was the largest (28.57%) at the coil voltage of 0 V. When the volume of magnetorheological fluid maintained at 1.5 mL and coil voltage increased from 0 to 28 V, the nozzle flow rate increased by 25.00%.

Conclusion
The variable nozzle based on magnetorheological fluid can realize variable flow rate control by controlling the external magnetic field, and therefore the designed variable nozzle can be used in precise variable agricultural spraying.
- smart material,
- magnetorheological fluid,
- agricultural variable nozzle,
- coil voltage,
- simulation,
- precise variable spraying

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References (25)

References

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