CN103410861A - 非均匀狭缝节流静压气体轴承 - Google Patents

非均匀狭缝节流静压气体轴承 Download PDF

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CN103410861A
CN103410861A CN2013103128835A CN201310312883A CN103410861A CN 103410861 A CN103410861 A CN 103410861A CN 2013103128835 A CN2013103128835 A CN 2013103128835A CN 201310312883 A CN201310312883 A CN 201310312883A CN 103410861 A CN103410861 A CN 103410861A
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bearing
slit
throttling
gas
aerostatic bearing
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于贺春
李欢欢
张国庆
赵则祥
乔雪涛
张洪
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Zhongyuan University of Technology
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Zhongyuan University of Technology
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Abstract

一种非均匀狭缝节流静压气体轴承，主要由定子组件和转子组件组成，转子组件包括中空心圆柱形的轴承基体，在轴承基体上设有节流狭缝。本发明综合了狭缝供气和轴承刚度异向性在提高气体轴承稳定性的优点，在降低耗气量的基础上，提高气体轴承转子***的精度和稳定性，进一步拓宽了气体轴承的应用范围。

Description

非均匀狭缝节流静压气体轴承
技术领域
本发明涉及一种非均匀狭缝节流静压气体轴承。
背景技术
气体轴承是一种以气体作为润滑剂的滑动轴承，与传统的滚动轴承或油膜润滑轴承相比，气体静压轴承具有以下几方面的优点：（1）摩擦小、能耗低、寿命长。由于气体的粘度仅为润滑油的千分之一，因此其摩擦损耗极低，这极大地改善了高速机械的工作性能；（2）由于气膜的匀化效应，其运转平滑、精度高，能保证较高的回转精度，可用于精密设备、计算机硬盘磁头等领域；（3）耐高温、低温性能好，抗辐射能力强；由于气体粘度受温度的影响远远小于润滑油，气体轴承可以在很宽的温度范围内正常工作；辐射对气体润滑性能亦无影响。因此它可以工作在极端工况下。利用这一点，可将其用于低温、制冷领域或核工业的透平膨胀机及深冷回转机械，或者高温领域的燃气透平机械。（4）清洁度高，不污染环境。由于气体轴承直接利用空气或机内工作介质作为润滑剂，不具有任何污染源，这在电子、航天、医药、医疗器械、食品等工业领域是最合适的轴承元件。由于上述的优点，气体轴承可以用于许多领域，且具有不可替代的作用，越来越受到科研人员的重视。
由于气体的粘度小及气体的可压缩性，气体轴承刚度低、阻尼小，因此导致气体轴承-转子***的稳定性较差。为提高***的稳定性，1967年，Tondl提出了逆切向供气法以提高轴承的稳定性，并且很快获得了成功应用，在一定程度提高了***的稳定。1933年，Smith提出轴承刚度非对称性可以提高轴承的稳定范围。目前，随着气体轴承转速的提高以及对运转精度要求的进一步提高，传统结构轴承难以满足要求。
发明内容
为解决现有静压气体轴承稳定性差的技术问题，本发明提供一种非均匀狭缝节流静压气体轴承。
为了解决上述问题采用以下技术方案：一种非均匀狭缝节流静压气体轴承，主要由定子组件和转子组件组成，转子组件包括中空心圆柱形的轴承基体，在轴承基体上设有节流狭缝。
所述的节流狭缝沿轴承基体的圆周方向不连续、不均匀分布。
所述的节流狭缝在轴承基体圆周方向分别采用不同的狭缝宽度。
本发明综合了狭缝供气和轴承刚度异向性在提高气体轴承稳定性的优点，在降低耗气量的基础上，提高气体轴承转子***的精度和稳定性，进一步拓宽了气体轴承的应用范围。
附图说明
图1是非均匀狭缝节流静压气体轴承结构示意图。
图2是图1A-A向视图。
具体实施方式
下面结合附图对本发明进行进一步地描述。如图1所示，一种非均匀狭缝节流静压气体轴承，主要由定子组件和转子组件组成，转子组件包括中空心圆柱形的轴承基体1，在轴承基体上设有节流狭缝2。
节流狭缝2沿轴承基体1的圆周方向呈不连续、不均匀分布，如图2所示，节流狭缝沿轴承基体的圆周方向分为四段，分别为α1、α2、α3、α4，四段节流狭缝之间分别间隔β1、β2、β3、β4。其中，α1≠α2≠α3≠α4，β1≠β2≠β3≠β4。
节流狭缝在轴承基体圆周方向分别采用不同的狭缝宽度，如图2所示，α1、α2、α3、α4处的狭缝的宽度分别为d1、d2、d3、d4，其中，d1≠d2≠d3≠d4，且狭缝宽度均为微米级。
采用狭缝节流形式，可以改善流场的压力分布，并提高轴承的精度及稳定性；根据实际应用需求，合理设置各段节流狭缝分布角度、大小及相应节流狭缝的宽度，可以提高轴承的稳定性。

Claims (3)

1.一种非均匀狭缝节流静压气体轴承，主要由定子组件和转子组件组成，其特征是：转子组件包括中空心圆柱形的轴承基体，在轴承基体上设有节流狭缝。
2.根据权利要求1所述的非均匀狭缝节流静压气体轴承，其特征是：所述的节流狭缝沿轴承基体的圆周方向不连续、不均匀分布。
3.根据权利要求1所述的非均匀狭缝节流静压气体轴承，其特征是：节流狭缝在轴承基体圆周方向分别采用不同的狭缝宽度。
CN2013103128835A 2013-09-22 2013-09-22 非均匀狭缝节流静压气体轴承 Pending CN103410861A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040061414A (ko) * 2002-12-30 2004-07-07 주식회사알피엠텍 슬롯 리스트릭터 공기 저널 베어링 지지 회전체-베어링시스템
KR20070101484A (ko) * 2006-04-11 2007-10-17 노병후 비대칭 급기공 저널 베어링
CN101589242A (zh) * 2006-10-31 2009-11-25 Gsi集团有限公司 空气静力轴承心轴

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040061414A (ko) * 2002-12-30 2004-07-07 주식회사알피엠텍 슬롯 리스트릭터 공기 저널 베어링 지지 회전체-베어링시스템
KR20070101484A (ko) * 2006-04-11 2007-10-17 노병후 비대칭 급기공 저널 베어링
CN101589242A (zh) * 2006-10-31 2009-11-25 Gsi集团有限公司 空气静力轴承心轴

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
H. C. GARG: "Performance of Asymmetric Slot-Entry Hybrid Journal Bearing Operating with Non-Newtonian Lubricant", 《JOURNAL OF ENGINEERING AND TECHNOLOGY》 *
H.C. GARG等: "Performance of slot-entry hybrid journal bearings considering combined influences of thermal effects and non-Newtonian behavior of lubricant", 《TRIBOLOGY INTERNATIONAL》 *
JUNG-KOO PARK等: "Stability analyses and experiments of spindle system using new type of slot-restricted gas journal bearings", 《TRIBOLOGY INTERNATIONAL》 *
SATISH C. SHARMA等: "A study of slot-entry hydrostatic/hybrid journal bearing using the finite element method", 《TRIBOLOGY INTERNATIONAL》 *
SATISH C.SHARMA等: "Thermohydrostatic analysis of slot-entry hybrid journal bearing", 《TRIBOLOGY INTERNATIONAL》 *

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Application publication date: 20131127