TY - JOUR
T1 - An investigation for the friction torque of a needle roller bearing with the roundness error
AU - Liu, Jing
AU - Yan, Zhanglin
AU - Shao, Yimin
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3
Y1 - 2018/3
N2 - Needle roller bearings (NRBs) are key components in industrial machinery. The rotational accuracy and efficiency of the machinery are determined by the friction torques of their interior NRBs. This study proposes an analytical method for calculating the friction torque of a NRB without and with the roundness error. This model formulates the rolling friction torques produced by the elastic material hysteresis, slipping friction torques generated by differential slipping, viscous friction torques caused by the lubricating oil, slipping torques generated by the slipping between mating components, and centrifugal force of the needle roller. The friction torques of a healthy solid-grease-lubricated NRB calculated by Palmgren's, SKF's, Chiu and Myers's, and proposed methods are compared. The influences of the radial load, inner raceway velocity, and roundness error on the friction torque increment of an unhealthy solid-grease-lubricated NRB are analyzed by using the proposed method. Moreover, the results from Palmgrem's method, SKF's method, Chiu and Myers's method, proposed method, and Iqbal et al.’s experimental investigations are compared to validate the proposed method. It seems that this study can give a more accurate method for predicting the friction torque of the NRB with the roundness error compared to the previous empirical methods.
AB - Needle roller bearings (NRBs) are key components in industrial machinery. The rotational accuracy and efficiency of the machinery are determined by the friction torques of their interior NRBs. This study proposes an analytical method for calculating the friction torque of a NRB without and with the roundness error. This model formulates the rolling friction torques produced by the elastic material hysteresis, slipping friction torques generated by differential slipping, viscous friction torques caused by the lubricating oil, slipping torques generated by the slipping between mating components, and centrifugal force of the needle roller. The friction torques of a healthy solid-grease-lubricated NRB calculated by Palmgren's, SKF's, Chiu and Myers's, and proposed methods are compared. The influences of the radial load, inner raceway velocity, and roundness error on the friction torque increment of an unhealthy solid-grease-lubricated NRB are analyzed by using the proposed method. Moreover, the results from Palmgrem's method, SKF's method, Chiu and Myers's method, proposed method, and Iqbal et al.’s experimental investigations are compared to validate the proposed method. It seems that this study can give a more accurate method for predicting the friction torque of the NRB with the roundness error compared to the previous empirical methods.
KW - Friction torque
KW - Grease lubrication
KW - Needle roller bearings
KW - Roundness error
UR - http://www.scopus.com/inward/record.url?scp=85032827696&partnerID=8YFLogxK
U2 - 10.1016/j.mechmachtheory.2017.10.028
DO - 10.1016/j.mechmachtheory.2017.10.028
M3 - 文章
AN - SCOPUS:85032827696
SN - 0094-114X
VL - 121
SP - 259
EP - 272
JO - Mechanism and Machine Theory
JF - Mechanism and Machine Theory
ER -