In order to improve the transmission efficiency of the gearbox and reduce power loss,a simulation calculation method for the transmission efficiency of the gearbox is proposed.Establish a transmission model for the gearbox system based on KISSsys,calculate the losses of gears,bearings,shaft seals,etc.,and apply it to the transmission efficiency analysis of the twin-screw extruder gearbox.Obtain the efficiency value of the gearbox through loading experiments and compare it with the results of theoretical simulation calculations.The results show that the maximum deviation between simulation calculation and experimental results is 0.28%,and the proposed simulation calculation method can predict the efficiency of the gearbox of the twin-screw extruder well;The influence of gear pressure angle and lubricating oil type on transmission efficiency was analyzed.The KISSSsys analysis results showed that increasing the gear pressure angle from 20 ° to 25 ° reduced the load loss of the gear by 22.26%and increased the transmission efficiency by 0.24%;By using polyethylene glycol synthetic lubricating oil,the average gear load loss was reduced by 28.83%,the average bearing loss was reduced by 19.68%,and the transmission efficiency was improved by an average of 0.59%.
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