Research on Mass Concentration Detection Method of Ferromagnetic Abrasive Particles Based on Two-State Tests
For the rotary PQ index detector can only detect the dimensionless index of ferromagnetic wear par-ticles.While the plug-in Iron content detector can only detect the concentration of ferromagnetic abrasive par-ticle,and it has low detection accuracy.A method is proposed in this paper to establish a mathematical model for converting the PQ index into the wear particle concentration by using a rotary PQ index detector to test the samples in two different states and by index calculation and coefficient fitting.It is verified that the fitting method has high accuracy for ferromagnetic abrasive particles greater than 10pm,and the relative error between the fit-ting method and the actual value of ferromagnetic abrasive particles in oil is within±8％.The results show that the method can obtain PQ index and ferromagnetic abrasive particle concentration simultaneously,which is help-ful to judge the friction and wear status of mechanical equipment and optimize the analysis of large abrasive par-ticles.
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