Research On The Relationship Between Swing Parameters And Performance Of Curved-groove Ball Bearings

In traditional agricultural equipment,reciprocating motion mechanism mainly includes crank slider mechanism and CAM mechanism.Although these mechanical device can realize reciprocating motion,the mechanical structure is complex,the transmission efficiency is low,and the inertia effect is difficult to eliminate.Our project team has designed a curved-groove ball bearing,which can turn the rotary motion into a reciprocating linear motion.This kind of bearing outer ring(or inner ring)raceway is a 3d sine(or cosine)curve ring road,which can realize the effect of circumferential extrusion and axial rubbing.In order to research the relationship between the swing parameters and the performance of the curved-groove ball bearing,a series of 12 oscillating parameters of the curved-groove ball bearing were tested and the friction torque and bearing capacity were studied.The specific research results obtained in this paper are as follows:(1)Firstly,this paper analyzes the different oscillating parameters of curved-groove ball bearing structure,determine the different design parameters,the curve shape,outer ring raceway structure and the relations of big ball and small ball.On this basis,The number of balls were 5,7,9,11 and the amplitude were 0.75 mm,1mm,1.25 mm.Parameter design,3d modeling and simulation assembly of 12 oscillating curved-groove ball bearing are carried out.(2)According to 12 kinds of oscillation parameters of curved-groove ball bearing,determined the processing and assembling process and improved the processing scheme of outer ring,inner ring and retainer.Completed the 12 kinds of curved-groove ball bearing,including the selection of raw materials,rough machining,heat treatment,grinding,machining and assembly.(3)The relationship between the oscillating parameters of curved-groove ball bearing and its friction torque is studied.Using the friction torque test platform of curved-groove ball bearing,the tester speed,axial load,the size of the ball number and amplitude of curved-groove ball bearing are studied.By analyzing the test results,it is concluded that the friction torque of curved-groove ball bearing increases with the increase of the speed and axial load of the test instrument.With the increase of ball number and the amplitude increases,the friction torque of curved-groove ball bearing increases.(4)The relationship between swing parameters and bearing capacity of curved-groove ball bearing is studied.Using the load performance testing platform of curved-groove ball bearing,the influence of rotational speed,axial force,radial force,ball number and amplitude on the bearing capacity of curved-groove ball bearing is studied.The results of the test were analyzed and the following conclusions were drawn: within 0-2min,the temperature rises very slowly.During the 2-8min,the temperature rise will become larger and then smaller,and then the thermal equilibrium was reached after 8min.With the increase of the rotational speed,the axial radial force increases,the number of ball bearings and the amplitude,the temperature rise increases,and the thermal equilibrium temperature rises.This research design and manufacture the 12 kinds of oscillation parameters of curved-groove ball bearing.The relationship between oscillation parameters and performance of curved-groove ball bearing is studied.This paper provides a reference for the follow-up study of curved-groove ball bearing,which is helpful for further promotion of curved-groove ball bearing.