Surface Profile Observation of PTFE Thrust Bearings under Rolling Contact Fatigue in Water

Abstract

The life of the PTFE thrust bearing under rolling contact fatigue (RCF) was investigated. The different conditions of axial loads and the rotating speeds under water were applied. The shapes of the bearing race before and after the tests were measured by a two-dimensional shape measurement sensor. The wear loss of PTFE bearing was rarely generated and the shape of the bearing changed slightly in the test. However, it was found that the lifetime of PTFE bearing depended on the temperature generated in the contact surface. In our testing machine condition, the bearing was collapsed over a load of 1600 N.

Surface crack and wear of PPS polymer thrust bearings under rolling contact fatigue in water

“…This is the same as in our previous studies about polymer bearings under RCF in water. [5][6][7][8][9][10] This is contrary to the main reason under dry condition that is wear loss for polymer materials. [11][12][13][14][15][16] In the present study, grooves of new specimens were made with feedrate of 0?12 mm rev 21 , which was finer than in our previous study.…”

Evolution and new horizons in modeling crack mechanics of 3D printing polymeric structures

“…The rolling aluminium balls applied the shear stress and then led to the main subsurface cracks propagation from the artificial notch. As for the semi-circular cracks, the tensile stress resulted in it on the raceway surface, as shown in Figure4-4[43].Similarly, some research also focused on the rolling fatigue crack propagation in polymer bearings[44][45][46][47][48]. Shi, Kida and Kashima observed the surface crack of polyphenylene sulphide (PPS) polymer thrust bearings under water.…”

Rolling Contact Fatigue and Static Compression Deformation of UHMWPE thrust bearing in water

“…The RCF tests of UHMWPE thrust bearings were done using a RCF test machine which was developed by the Kida's group [3][4][5][6]. Figure 2 shows a schematic illustration of the RCF testing machine.…”

“…Figure 2 shows a schematic illustration of the RCF testing machine. All tests were performed in water and total number of cycles was 1.0×10 6 . The RCF tests were stopped when the rotating resistance increased rapidly.…”

“…The thermal deformation depended on the thrust load and rotation speed. Furthermore, we studied PEEK, PPS, and PTFE bearings in water [3][4][5][6].…”