Multidimensional Study on the Wear of High-Speed, High-Temperature, Heavy-Load Bearings

Abstract

The friction and wear performance of high-performance bearings directly affects the accuracy and maneuverability of weapons and equipment. In this study, high-speed, high-temperature, and heavy-load durability experiments of weapon bearings were carried out, and their wear properties (i.e., surface wear, metamorphic layer, scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), residual stress, and retained austenite) were analyzed in multiple dimensions. The results showed the following: (1) The experimental temperature of the serviced front-end bearing is always lower than that of the rear bearing. (2) The metamorphic layer of the serviced rear bearing (i.e., inner ring, outer ring, rolling body, and cage) > the metamorphic layer of the serviced front-end bearing > the metamorphic layer of the unserviced bearing. (3) The rolling body of the rear bearing at high experimental temperatures contains not only elemental O, but also elemental P and Sr. (4) In the EDS analysis of the rolling elements, with the migration from the “ball edge” to the “ball center”, the elemental C in the rolling elements of serviced or unserviced bearings decreases slowly, while the elemental Fe content increases slowly.

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

“…The wear failure of bearings is a complex process involving several stages such as initial wear, stable wear, and severe wear [66]. The initial wear is related to the material properties of the bearings themselves, while the wear gradually slows down after entering the sTa wear stage [67,68]. In the later stages of wear, the bearing may undergo severe plastic deformation due to factors such as abrasive particles, changes in load, and other particles, which can accelerate the failure or damage of the bearing [69,70].…”

“…The study found that taking into account reduced frictional interactions due to wear can lead to more accurate predictions of bearing wear. Wang et al [68] conducted multiple sets of high-speed, high-temperature, and heavy-duty durability experiments to investigate the frictional wear of high-performance bearings. They discovered that impurities adsorb onto the bearing surface after it has been damaged by abrasive wear.…”

Study on microstructure of 42CrMo steel by ultrasonic surface rolling process

“…42CrMo steel is widely used in the manufacture of wind power bearing rings due to its unique wear resistance and high hardness 1 – 3 . However, at the same time, because the wind turbine bearing rings are in the harsh working environment in the field, under harsh working conditions such as cold, sand and tide, the surface is very prone to fatigue pitting 4 , wear 5 and even fracture 6 and other failure forms. This will adversely affect the normal operation of wind turbines bearing rings.…”