Purpose

The purpose of this paper is to introduce the structure design process of the cantilever spindle with limited installation space and wishing to increase its critical speed.

Design/methodology/approach

In this paper, the finite element method was used to analyze the influence of the supporting stiffness and the structure of the spindle on the critical speed, and then the structure of the spindle was designed; moreover, the experiment was accomplished and the experiment results show that the spindle can work stably.

Findings

Through analyzing the influence of the supporting stiffness and the structure of the spindle on the critical speed, the following conclusions could be obtained: the shape of the first-mode is the bend vibration of the cantilever of the spindle; the first-order critical speed of the spindle gradually decreases with the diameter and length of the cantilever increasing; the first-order critical speed of the spindle increases with the depth and diameter of the blind hole increasing; and the experiment was accomplished and the experiment results show that the spindle can work stably.

Originality/value

In this paper, the finite element method was used to design the spindle of the testing machine, and satisfactory results were obtained. It can provide a theoretical reference for the design of a similar spindle.

中文翻译：

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悬臂高速滚动轴承试验台主轴的结构设计

目的

本文的目的是介绍具有有限安装空间并希望提高其临界转速的悬臂主轴的结构设计过程。

设计/方法/方法

本文采用有限元方法分析了支撑刚度和主轴结构对临界转速的影响，进而设计了主轴结构。实验结果表明，主轴工作稳定。

发现

通过分析支承刚度和主轴结构对临界转速的影响，可以得出以下结论：第一模的形状为主轴悬臂的弯曲振动。主轴的一阶临界速度随着悬臂直径和长度的增加而逐渐减小。主轴的一阶临界速度随着盲孔的深度和直径的增加而增加。实验结果表明，主轴工作稳定。

创意/价值

本文采用有限元方法对试验机主轴进行了设计，取得了满意的结果。它可以为类似主轴的设计提供理论参考。