CAJ | 학술논문

为了揭示行星滚柱丝杠副滚滑机理，基于滚柱螺纹球面牙型特点，采用等效球的方法，分别建立了未考虑弹性变形和考虑弹性变形的行星滚柱丝杠副滚滑分析模型。通过求解两侧接触点的相对滑动速度，研究其滚滑特性。采用滑滚比表征两接触侧滑动量与滚动量的相对关系，分别计算了两接触侧滑滚比，并重点研究了螺纹结构参数中接触角、螺旋升角和滚柱螺纹牙数对两接触侧滑滚比的影响规律。分析结果表明，考虑弹性变形，丝杠与滚柱接触侧会产生相对滑动，且两接触侧沿螺旋线切向产生的相对滑动速度最大；接触角和螺旋升角对两接触侧滑滚比的影响趋势均相反，增大螺旋升角更有利于降低螺母侧滑滚比；滚柱螺纹牙数对两接触侧滑滚比的影响较小。
위료게시행성곤주사강부곤활궤리，기우곤주라문구면아형특점，채용등효구적방법，분별건립료미고필탄성변형화고필탄성변형적행성곤주사강부곤활분석모형。통과구해량측접촉점적상대활동속도，연구기곤활특성。채용활곤비표정량접촉측활동량여곤동량적상대관계，분별계산료량접촉측활곤비，병중점연구료라문결구삼수중접촉각、라선승각화곤주라문아수대량접촉측활곤비적영향규률。분석결과표명，고필탄성변형，사강여곤주접촉측회산생상대활동，차량접촉측연라선선절향산생적상대활동속도최대；접촉각화라선승각대량접촉측활곤비적영향추세균상반，증대라선승각경유리우강저라모측활곤비；곤주라문아수대량접촉측활곤비적영향교소。
In order to disclose the rolling-sliding mechanism of the planetary roller screw, the models of rolling-sliding analysis of the planetary roller screw( PRS) with and without elastic deformation are developed by using the equivalent ball method based on the characteristic of spherical surface of the roller thread.The rolling-sliding characteristics are studied by calculating the relative slip veloci-ties of contact points on the screw side and the nut side.The slide-roll ratios of two contact sides are calculated respectively to express the relative amounts of sliding and rolling.Furthermore, the influ-ence of contact angle, helix angle and tooth number of the roller thread on slide-roll ratios is taken into account.The results show that the slide between the screw and the rollers always occurs consid-ering elastic deformation and the relative slip velocity in the direction of tangent along helical trajec-tory on the screw side and the nut side is the highest.The influence trends of contact angle and helix angle on slide-roll ratios of two contact sides are opposite and the slide-roll ratio of the nut side can be reduced by increasing helix angle.Besides, increasing tooth number of the roller thread has little effect on the slide-roll ratios.