A high-speed and long-life triboelectric sensor with charge supplement for monitoring the speed and skidding of rolling bearing

The impulse response of a rolling bearing and its principal component, the elasto-hydrodynamic lubrication film (EHDL), are analysed. When measuring the vibrations of bearings, we observed that the impulse response was mostly caused by defects (fatigue damage) on the raceways and/or rolling elements. However, this phenomenon can also occur in new defect-free roller bearings, where it is not commonly expected. This study presents an experiment that identifies the conditions of dynamic excitation for the impulse response of the EHDL, the source of which is not defects, but the EHDL itself. The EHDL responds in the form of impulses in case the velocity of its radial deformation is too fast. This is an unfavourable phenomenon that significantly shortens the service life of bearings. To analyse the dynamic excitation conditions, a testing bench at speeds up to 135,000 rpm with a flat belt drive was used. The testing bench enabled the formation of the so-called beat excitation from two harmonic excitation forces close in rotational frequency. The subject of this study is a defect-free high-speed double-row angular contact ball bearing used in the textile industry. We also present other physical conditions for the occurrence of undesired impulse responses that are caused by the EHDL.

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Measures on Improving the Mechanical Properties and Construction Standards of Highway

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.4274 ◽

2011 ◽

Vol 243-249 ◽

pp. 4274-4278

Author(s):

Yan Cang Jiang

Keyword(s):

Mechanical Properties ◽

Carrying Capacity ◽

High Speed ◽

High Standard ◽

Traffic Load ◽

Heavy Vehicles ◽

Long Life ◽

Design Materials

Currently, there are so many heavy vehicles being driven fast and overloading on highway. Carrying capacity of highway are not fit with this situation, They are often run in a serious state of overloading and fatigue. This directly influenced the life of highway. So, to improve the mechanical properties and carrying capacity of highway, and to construction high standard, high speed, large-tonnage, long-life modern highway are urgent and imperative. This article analyzes the current traffic load and design, materials select and construction status of highway, and proposed some measures to improve mechanical properties and construction standards of highway. Life of highway can be greatly improved by adopt these measures.

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Main failure mode of oil-air lubricated rolling bearing installed in high speed machining

Tribology International ◽

10.1016/j.triboint.2017.03.024 ◽

2017 ◽

Vol 112 ◽

pp. 68-74 ◽

Cited By ~ 15

Author(s):

Zhou Chang ◽

Qian Jia ◽

Xing Yuan ◽

Yaolong Chen

Keyword(s):

Failure Mode ◽

High Speed ◽

Rolling Bearing ◽

High Speed Machining

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Development of Test Rig for High-Speed Railway Rolling Bearings

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.101-102.702 ◽

2011 ◽

Vol 101-102 ◽

pp. 702-707 ◽

Cited By ~ 1

Author(s):

Zhao Dong Huang ◽

Bo Qian Fan ◽

Xiao Ping Ouyang ◽

Ling Ling Xu ◽

Zhi Gang Wang

Keyword(s):

High Speed ◽

High Performance ◽

Rolling Bearing ◽

Main Shaft ◽

Heavy Vehicles ◽

Test Rig ◽

Rolling Bearings ◽

Heavy Load ◽

High Speed Railway ◽

Mechanical Structure

The rolling bearing test rig for heavy vehicles often works under heavy load and high speed, thus it requires high performance for the main shaft and mechanical structure. In this paper a design of test rig for high-speed railway rolling bearings is presented, in which a new structure is adopted to reduce the load on the support bearings. The basic idea is to position the load in a way that they can be balanced by each other.

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Lubrication and Thermal Failure Mechanism Analysis in High-Speed Angular Contact Ball Bearing

Journal of Tribology ◽

10.1115/1.4038356 ◽

2017 ◽

Vol 140 (3) ◽

Cited By ~ 1

Author(s):

Wang Yunlong ◽

Wang Wenzhong ◽

Li Yulong ◽

Zhao Ziqiang

Keyword(s):

Rotational Speed ◽

High Speed ◽

Ball Bearing ◽

Rolling Bearing ◽

Operating Conditions ◽

Contact Forces ◽

Mechanism Analysis ◽

Angular Contact Ball Bearing ◽

Thermal Failure ◽

Lubrication Performance

Lubrication analysis of rolling bearing is often conducted with assumed operating conditions, which does not consider the effect of internal dynamics of rolling bearing. In this paper, the effects of the applied load and bearing rotational speed on the lubrication performance in an angular contact ball bearing are conducted, which combines the bearing dynamic analysis and thermo-elastohydrodynamic lubrication (TEHL) analysis. First, the internal motions and contact forces are obtained from the developed bearing dynamic model, and then were integrated into the TEHL model to investigate the lubrication performance of the bearing. The results show that the rotational speed and external load has significant effects on film thickness, temperature, and power loss; if the improper axial load is applied for certain bearing speed, the lubrication performance will deteriorate and thermal failure may occur; there exists critical load or speed to keep good lubrication performance and avoid thermal failure; the skidding contributes to the thermal failure and bad lubrication performance.

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