US 11,768,149 B2
Device for measuring frictional force and film thickness of lubricating oil film in different surface velocity directions
Jianjun Zhang, Qingdao (CN); Hewei Lu, Qingdao (CN); Qinglun Che, Qingdao (CN); Jiahao Zhang, Qingdao (CN); Zhaogang Jing, Qingdao (CN); Chenglong Liu, Qingdao (CN); and Feng Guo, Qingdao (CN)
Assigned to QINGDAO UNIVERSITY OF TECHNOLOGY, Qingdao (CN)
Filed by QINGDAO UNIVERSITY OF TECHNOLOGY, Shandong (CN)
Filed on Aug. 13, 2021, as Appl. No. 17/402,243.
Claims priority of application No. 2020108140072 (CN), filed on Aug. 13, 2020.
Prior Publication US 2022/0050045 A1, Feb. 17, 2022
Int. Cl. G01N 19/02 (2006.01); G01N 33/30 (2006.01); G01B 5/06 (2006.01)
CPC G01N 19/02 (2013.01) [G01B 5/066 (2013.01); G01N 33/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device for measuring a frictional force and a film thickness of a lubricating oil film in different surface velocity directions, the device comprising a translation stage and a main shaft, wherein the translation stage is linearly movable under driving of a first driving device, the main shaft extends through the translation stage, a glass disc is fixed to an upper part of the main shaft, a lower part of the main shaft is driven by a second driving device to rotate, an arcuate guide rail is disposed on the translation stage, a rotary base is mounted to the arcuate guide rail and is movable along the arcuate guide rail, a loading system is mounted to the rotary base, a steel ball of the loading system and the glass disc are movable relative to each other, and a rotary bearing in the rotary base is configured to convert a frictional force generated from the relative movement to a pressure allowed to be collected by a pressure sensor on the rotary base.