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首页> 外文会议>DSC-vol.73-1; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition pt.A; 20041113-19; Anaheim,CA(US) >CONTROLLING BOTH THERMALLY INDUCED LOADS IN BACK-TO-BACK ANGULAR CONTACT SPINDLE BEARINGS
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CONTROLLING BOTH THERMALLY INDUCED LOADS IN BACK-TO-BACK ANGULAR CONTACT SPINDLE BEARINGS

机译：控制背对背角接触主轴轴承中的热感应载荷

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Thermally induced bearing loads may cause serious problems for metal cutting spindles when used at high speeds. While proper spindle bearing setup can help minimize this problem, ultimately the plethora of factors that cause the loads to vary cannot be accounted for by the setup. Previous work has shown that bearing load control is possible, but that improved performance may be realized if the temperature environment of each bearing of a back-to-back pair is considered separately. The purpose of this paper is to provide the results of an experimental evaluation of a bearing load control strategy using two thermal actuators. A box spindle was modified and two electric heating tapes were placed around the front pair of back-to-back angular contact ball bearings, one around each bearing. Significant control over the bearing loads can be achieved for the conditions tested including some level of independent control. Unfortunately, there is cross-talk between the heat actuators and the bearing loads, and this interferes with the level of independent load control that can be achieved over the individual bearings. The significance of this issue is discussed and future research outlined. The authors conclude that it is possible to significantly reduce the transient load variation in both bearings with two rather than one actuator; additionally, the second control loop usually improves the steady-state behavior over that achievable with single heater placed over the rear bearing.
机译：高速使用时，由热引起的轴承载荷可能会对金属切削主轴造成严重的问题。尽管正确的主轴轴承设置可以帮助最大程度地减少此问题，但最终，导致负载变化的因素过多，无法通过设置来解决。先前的工作表明可以进行轴承负载控制，但是如果分别考虑背对背轴承中每个轴承的温度环境，则可以实现改善的性能。本文的目的是提供对使用两个热执行器的轴承负载控制策略进行实验评估的结果。修改了箱形主轴，并在前后一对角接触球轴承的前对周围放置了两个电加热带，每个轴承上都围绕着一个。在测试条件下（包括一定程度的独立控制），可以实现对轴承载荷的有效控制。不幸的是，在热执行器和轴承负载之间存在串扰，并且这干扰了可以在单个轴承上实现的独立负载控制的水平。讨论了此问题的重要性，并概述了未来的研究。作者得出的结论是，有可能通过两个而不是一个执行器来显着降低两个轴承的瞬态载荷变化。此外，第二个控制回路通常会比将单个加热器放置在后轴承上方时所达到的稳态行为有所改善。

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