System of mathematical equations to predict wear rate on circular-cone orifice of pesticide spray nozzles

Akshay Kumar Singh

Abstract


Abstract: A simple system of mathematical equations was developed to predict wear rate on the circular-cone orifice (CCO) plates of hollow-cone type pesticide spray nozzles.  Geometrical and physical properties of CCOs, abrasiveness of spray solutions, time of usage and change in discharge rate were taken into considerations as observable parameters to predict wear.  The developed equations were also validated by conducting a long rum wear test on CCO plates made of plastic (P), stainless steel (S) and ceramic (C) materials.  Tests conducted on the wear test rig (WTR) by investigating each material at three different spray pressures 350, 700 and 1000 kPa, respectively.  Strong coefficient of determination (R2>0.96) between experimental and calculated values revealed that the developed system is suitable to predict wear rates for all the CCO plates with minor variations.  The CCO plates made of ceramic at spray pressure 350 kPa (C-350) have shown longest worn-out life as compared to C-700 and C-1000, respectively.  P-350 and S-350 have reported effective working of 40 h and 60 h, respectively.  CCO plates of ceramic have shown least wear rate due to minimum value of wear coefficient (Cw = 0.006) followed by stainless steel (Cw=0.013) and plastic (Cw= 0.016), respectively.  The validation of equations has also revealed that the use of CCO plates of ceramic material may not only enhance the component reliability of a sprayer or any atomization device but also ensure a precise quantity of pesticide spray due to comparatively least wear rate on orifice.

Keywords: Circular-cone orifice (CCO) plates, mathematical equations, spray pressure, wear rate, wear coefficient (Cw)

DOI: 10.33440/j.ijpaa.20190202.52.

 

Citation: Singh A K, Bhatt Y C, Dhande K G, Wandkar, S V.  System of mathematical equations to predict wear rate on circular-cone orifice of pesticide spray nozzles.  Int J Precis Agric Aviat, 2019; 2(2): 76–80.


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