液動軸承加開液靜注油槽開口參數之設計

The Calculation and Redesign of Recesses for Externally Pressurized Journal Bearings

謝進安 ； 鄭子銘 ； 劉鎮相

《石油季刊》 36卷1期 (2000/03) Pp. 51-58

https://doi.org/10.30128/JP.200003.0006

摘要

一般液動軸承於開機、停機或有異常重負荷震動時，容易因潤滑油膜不足或破裂，對軸承造成傷害。為改善液動軸承於此狀況下之潤滑操作，可以將液動軸承改為液靜軸承的設計，於軸承下方開一壓力給油之注油凹槽，供給液靜油壓。平時正常操作時，可關閉液靜油壓，使軸承以液動潤滑型態運轉；當停開機期間或異常重負荷時，則開動液靜油壓，使軸承改以液靜潤滑型態，以保護軸承免受傷害，達到降低軸承損壞率之目的。本文將以軋鋼馬達之液動軸承為例，說明軸承設計改善流程。經由液動軸承操作分析顯示，原馬達液動軸承操作狀況應屬合理，若改為液靜軸承則油槽開孔之大小、液靜油壓等的選擇影響軸響操作性能。本研究將針對液靜軸承開孔參數對軸承操作之影響作一分析，以提供潤滑操作改善。

關鍵字

液靜軸承 ； 注油凹槽 ； 限制器

並列摘要

Hydrodynamic journal bearing can be damaged due to the lack or break-down of fluid film during starting, stopping, or heavy shock load. To improve the lubrication performance of hydrodynamic journal bearings under these operating conditions, hydrostatic lubrication design can be applied to hydrodynamic bearings by opening a externally pressurized oil recess on the bearing under the load line. When under normal operation, the hydrostatic oil pressure can be shut down, and the bearing can run within hydrodynamic lubrication regime. During starting, stopping, or heavy shock load encountered; the external oil pressure can be supplied to protect the bearing from failure. In this article, hydrodynamic journal bearings in steel rolling main motors are taken as examples to illustrate improvement of lubrication design. The results show that the operation pereformance of main motor bearings are under normal conditions. By incorporating hydrostatic lubrication design, the influence of dimension of oil recess, and the applied external oil pressure on bearings' performance is studied in this paper.

並列關鍵字

Hydrostatic Bearing ； Oil Pocket ； Restrictor