Effect of oil film stiffness on vibration of full ceramic ball bearing under grease lubrication

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL Industrial Lubrication and Tribology Pub Date : 2024-06-26 DOI:10.1108/ilt-03-2024-0094

Jian Sun, Junran Huang, Zhonghao Tian, Jinmei Yao, Yang Zhang, Lu Wang

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Abstract

Purpose

This paper aims to understand the vibration characteristics of full ceramic ball bearings under grease lubrication, reduce the vibration of the bearings and improve their service life.

Design/methodology/approach

The Hertz contact stiffness formula for full ceramic ball bearings is constructed; the equivalent comprehensive stiffness calculation model and vibration model of full ceramic ball bearings are established. The dynamic characteristic test of full ceramic ball bearing under grease lubrication was carried out by using the bearing life testing machine, and its vibration was measured, and its vibration acceleration root-mean-square was obtained by software calculation and compared with the simulation results.

Findings

At the rotational speed of 12,000 r/min, the root-mean-square value of vibration acceleration is maximum 10.82 m/s², and the error is also maximum 7.49%. As the rotational speed increases, the oil film stiffness decreases. In the radial load of 600 N, the vibration acceleration root-mean-square is minimum 6.40 m/s², but its error is maximum 6.56%. As the radial load increases, the vibration of the bearing decreases and then increases, so under certain conditions increasing the radial load can reduce the bearing vibration. With different types of grease, the best preload is also different; low-speed heavy load should be used when the viscosity of the grease is large, and high-speed light load should be used when the choice of smaller viscosity grease is made.

Originality/value

It provides a theoretical basis for the application of full ceramic ball bearings under grease lubrication, which is of great significance for reducing the vibration of bearings as well as enhancing the service life of bearings.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2024-0094/

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油膜刚度对油脂润滑下全陶瓷球轴承振动的影响

设计/方法/途径构建了全陶瓷球轴承的赫兹接触刚度计算公式，建立了全陶瓷球轴承的等效综合刚度计算模型和振动模型。结果当转速为 12,000 r/min 时，振动加速度的均方根值最大为 10.82 m/s2，误差最大为 7.49%。随着转速的增加，油膜刚度降低。在径向载荷为 600 N 时，振动加速度均方根值最小为 6.40 m/s2，但其误差最大为 6.56%。随着径向载荷的增加，轴承的振动先减小后增大，因此在一定条件下增加径向载荷可以减小轴承的振动。对于不同类型的润滑脂，最佳预紧力也不同；当润滑脂的粘度较大时，应使用低速重载，而当选择粘度较小的润滑脂时，应使用高速轻载。原创性/价值它为全陶瓷球轴承在润滑脂润滑下的应用提供了理论依据，对降低轴承振动和提高轴承使用寿命具有重要意义。同行评议本文的同行评议记录可在以下网址查阅：https://publons.com/publon/10.1108/ILT-03-2024-0094/。

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来源期刊

Industrial Lubrication and Tribology 工程技术-工程：机械

CiteScore

3.00

自引率

18.80%

发文量

129

审稿时长

1.9 months

期刊介绍： Industrial Lubrication and Tribology provides a broad coverage of the materials and techniques employed in tribology. It contains a firm technical news element which brings together and promotes best practice in the three disciplines of tribology, which comprise lubrication, wear and friction. ILT also follows the progress of research into advanced lubricants, bearings, seals, gears and related machinery parts, as well as materials selection. A double-blind peer review process involving the editor and other subject experts ensures the content''s validity and relevance.