Purpose

The purpose of this paper is to research on optimization of spindle bearing preload based on efficiency coefficient method and provide theoretical guidance for variable preload of intelligent spindle.

Design/methodology/approach

Based on an established thermo-mechanical coupling model of angular contact ball bearing with fix-position preload, temperature rise and axial stiffness of the bearing at different speeds and preload are analyzed, and life of the bearing is estimated by the improved L-P theory. The bearing temperature rise, axial stiffness and life data are standardized, and the preload is optimized by the efficiency coefficient method according to the requirements of operating conditions.

Findings

The optimized preload meets comprehensive requirements of the bearing temperature rise, axial stiffness and life under different operating conditions.

Originality/value

In the past studies, it is rarely reported that temperature rise, stiffness and life of the bearing under thermo-mechanical coupling effect are used as objective functions to optimize preload at different speeds.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-06-2020-0205/

中文翻译：

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基于效率系数法的主轴轴承预紧力优化研究

目的

本文旨在基于效率系数法对主轴轴承预紧力进行优化研究，为智能主轴的可变预紧力提供理论指导。

设计/方法/方法

基于已建立的固定位置预紧角接触球轴承的热力耦合模型，分析了轴承在不同速度和预紧力下的温升和轴向刚度，并通过改进的LP理论估算了轴承的使用寿命。对轴承的温升，轴向刚度和寿命数据进行了标准化，并根据工作条件的要求，采用效率系数法对预载进行了优化。

发现

优化的预紧力可满足轴承在不同工况下的温升，轴向刚度和寿命的综合要求。

创意/价值

在过去的研究中，很少有报道将轴承在热力耦合作用下的温升，刚度和寿命作为目标函数来优化不同速度下的预紧力。

同行评审

本文的同行评审历史记录可在以下网址获得：https://publons.com/publon/10.1108/ILT-06-2020-0205/