CN111963568A - 导电且自润滑的轴承衬套、包括其的轴承及制造其的方法 - Google Patents
导电且自润滑的轴承衬套、包括其的轴承及制造其的方法 Download PDFInfo
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Abstract
本发明涉及一种轴承衬套(4),包括:第一织物(9),具有预先浸渍有粘合剂(12)的纤维片材(11),以及第二织物(10),浸渍有所述粘合剂(12),并且具有带有润滑纤维(14)的轴承元件接触表面(13)以及支撑所述轴承元件接触表面(13)的结构纤维(15)。所述纤维片材(11)和粘合剂(12)包含导电填料。
Description
技术领域
本发明总体上涉及轴承领域,特别地,涉及一种改进的轴承衬套以及包括该轴承衬套的轴承。该轴承衬套在使用中具有低磨损率、是导电的且可以用在多种应用中,例如,航空航天应用(aerospace application)。
背景技术
轴承是允许两个部件之间进行受约束的相对运动的装置。滑动轴承是最简单的轴承类型,仅包含轴承表面,而没有滚动元件。因此,轴颈(即,轴的与轴承接触的部分)在轴承表面上滑动。滑动轴承的最简单示例是在孔中旋转的轴。在工业机械中被称为全轴承的两件式滑动轴承通常用于较大直径的轴承,诸如曲轴轴承。自润滑的滑动轴承在轴承壁内含有润滑剂。润滑剂通常是轴承材料的整体元件(/一体元件)(integral element),并且在不需要外部维护的情况下保持轴承的补偿(/补充)用于其使用寿命的一部分。
滑动轴承往往在轴承表面之间包含衬套以减少摩擦。典型的现有技术中的用在自润滑轴承中的织物衬套包括与粘合剂结合的机织织物,以形成能够固定到轴承表面的复合材料。复合物的织物成分由润滑纱线(yarn)(通常为PTFE纤维)的顶表面和结构纱线(通常为玻璃纤维)组成,润滑纱线通过在工作表面上运动而降解并且为轴承提供润滑剂,结构纱线帮助保持润滑纱线并且提供具有其结构完整性的复合物(/复合材料)。
在EP-A1-2955400中描述了轴承衬套及其制造工艺的示例。织物衬套与预先浸渍有树脂粘合剂的纤维片材层压在一起。然后,将所得的层压件在高温下压缩,以使粘合剂渗出以浸渍织物。
改进这种复合的轴承衬套以使包括这种轴承衬套的滑动轴承能够广泛使用,这可能是非常令人感兴趣的。
发明内容
因此,本发明提供一种轴承衬套,所述轴承衬套包括第一织物,所述第一织物具有预先浸渍有粘合剂的纤维片材。所述轴承衬套还包括第二织物,所述第二织物浸渍有所述粘合剂,并且具有带有润滑纤维的轴承元件接触表面以及支撑所述轴承元件接触表面的结构纤维。
根据本发明,所述纤维片材和粘合剂包含导电填料(conductive fillers)。
由于本发明,所述轴承衬套是导电的。纤维片材的导电填料浸渍有也包括导电填料的粘合剂。电流能够经过衬套。在一些应用中,例如飞行器起落架(landing gear),不必提供额外的导电路径。本发明允许在特定应用中减少部件的数量,并由此降低成本和制造费用,并且可以用在需要导电部件的特别应用中。
所述导电的轴承衬套还是自润滑的,以增加轴承的工作寿命。
根据本发明的有利但非强制性的其他方面,这种轴承衬套可以包含以下特征中的一个或多个:
-导电填料包括石墨填料和/或碳填料和/或金属填料,诸如铜或银。
-所述粘合剂包括至少2wt.%的石墨填料。
-所述粘合剂包括树脂,优选地所述粘合剂包括酚醛树脂。
-所述润滑纤维包括PTFE。
-所述结构纤维包括10wt.%至30wt.%的玻璃和/或碳和/或聚酯和/或芳族聚酰胺,以及70wt.%至90wt.%的PTFE。
在另一方面,本发明还提供一种轴承,所述轴承包括内圈、外圈以及根据前述实施方式中的任一实施方式的的轴承衬套,在此所述轴承衬套布置在所述内圈与所述外圈之间。
根据本发明的有利但非强制性的其他方面,这种轴承可以包含以下特征中的一个或多个:
-所述轴承衬套固定到所述外圈的内表面,轴承元件表面与内圈的外表面接触。
-所述轴承衬套固定到所述内圈的外表面,轴承元件表面与外圈的内表面接触。
-所述内圈具有凸形的外表面,所述外圈具有凹形的内表面。
-所述外圈具有凸形的内表面,所述内圈具有凹形的外表面。
–圈中的至少一个圈由轴承钢制成,例如AMS 5630或AMS 5643。
-所述内圈是旋转的轴颈。
-所述外圈是固定的壳体。
-所述轴承是滑动轴承。
在另一方面,本发明提供一种制造根据前述实施方式中的任一实施方式的轴承衬套的方法,所述方法包括以下步骤:
(a)提供第一织物,所述第一织物包括预先浸渍有粘合剂的纤维片材,所述纤维片材和粘合剂包含导电填料,
(b)提供第二织物,所述第二织物包括具有润滑纤维的轴承元件接触表面以及支撑所述轴承元件接触表面的结构纤维,以及
(c)在高温下使所述第一织物和所述第二织物接触并压缩在一起,使得,所述第一织物中的粘合剂中的至少一些粘合剂转移到所述第二织物并且浸渍所述第二织物。
在接触和压缩步骤中,有利地,使浸有粘合剂且导电的第一织物压抵第二织物的具有结构纤维的一侧,即与轴承元件表面相反的一侧。
所述方法允许将两种织物进行组合以形成整体的轴承衬套。第一织物的导电粘合剂浸渍具有自润滑纤维和结构纤维的第二织物。由此,第二织物是导电的。
在高温(例如,160℃至180℃)下执行压缩。所使用的温度将取决于粘合剂材料的性质。高温促进(/增加)转移到第二织物并浸渍第二织物的粘合剂的量。第一织物和/或第二织物通常是编织的(woven)。
附图说明
现在将根据作为示例性示例而不限制本发明的目的的附图来说明本发明。在附图中:
-图1是根据本发明的包括轴承衬套的轴承的半轴向部分;
-图2是根据本发明的示意性轴承衬套。
具体实施方式
参照图1,具有主轴线X1的轴承1包括内圈2、外圈3和布置在内圈2与外圈3之间的轴承衬套(/轴承内衬)(bearing liner)4。
内圈2包括圆柱形孔5和球形(/球面形)的凸形外表面6。有利的是,内圈由轴承钢(例如AMS5630)形成。
外圈3相对于内圈2同心地定位。外圈3包括圆柱形外表面7和球形(/球面形)的凹形内表面8。外圈3的内表面8和内圈2的外表面6分别具有对应的形状,以允许它们之间的相对运动。
内圈2可以是可运动的圈,外圈3可以是静止(/固定)(stationary)的圈。作为另一种选择,内圈2可以是静止的圈,而外圈3可以是可运动的圈。
作为另一种选择,内圈2可以包括在(/存在于)轴颈中。作为另一种选择,外圈3可以包括在静止(/固定)的壳体(/座)(housing)中。
轴承衬套4在径向上介于外圈3的内表面8与内圈2的外表面6之间。图2中进一步详细描述了轴承衬套4。
轴承衬套4包括第一织物(fabric)9和第二织物10。
第一织物9具有预先浸渍有粘合剂(binder)12的纤维片材(/纤维片)11。有利的是,粘合剂12包括树脂,优选酚醛树脂。
第二织物10具有带有润滑纤维14的轴承元件接触表面13以及支撑所述轴承元件接触表面13的结构纤维15。有利的是,润滑纤维包括PTFE。有利的是,结构纤维包括10wt.%(/重量百分比)至30wt.%的玻璃和/或碳和/或聚酯和/或芳族聚酰胺(aramid),以及70wt.%至90wt.%的PTFE。第二织物10浸渍有第一织物9的粘合剂12。
在图2的实施方式中,轴承衬套4固定到内圈2的外表面6,轴承元件接触表面13与外圈3的内表面8滑动接触。作为另一种选择,轴承衬套4可以固定到外圈3的内表面8,轴承元件接触表面13与内圈2的外表面6滑动接触。
在轴承1的使用寿命期间,这种自润滑的轴承衬套4允许降低磨损率。
根据本发明,所述纤维片材11和粘合剂12包含导电填料。
然后,第一织物9是导电的。第一织物9的树脂粘合剂12也浸渍第二织物10,然后所述第二织物10也是导电的。
导电填料包括石墨填料和/或金属填料,诸如铜或银。有利地,粘合剂包括至少2wt.%的石墨填料以确保有效的导电性。
轴承衬套4允许电流通过。然后,轴承1在内圈2(通过内表面6)与轴承衬套4之间以及在外圈3(通过外表面8)与轴承衬套4之间是导电的。
制造这种自润滑且导电的轴承衬套4的方法包括以下步骤:提供第一织物9,第一织物9包括预先浸渍有粘合剂12的纤维片材11,所述纤维片材11和粘合剂12包含导电填料。
然后,该方法包括以下步骤:提供第二织物10,第二织物10包括具有润滑纤维14的轴承元件接触表面13以及支撑轴承元件接触表面的结构纤维15。
该方法包括以下最终步骤:在高温下使第一织物9和第二织物10接触并压缩在一起,诸如第一织物9中的粘合剂12中的至少一些转移到第二织物10并且浸渍所述第二织物10。
在接触和压缩步骤中,有利地,使浸有粘合剂且导电的第一织物9压抵第二织物10的具有结构纤维15的一侧,即与轴承元件表面13相反的一侧。
在高温(例如,160℃至180℃)下执行压缩,以促进(/增加)(facilitate)转移到第二织物10并浸渍第二织物10的粘合剂12的量。
图1中示出的轴承1是滑动轴承。有利地,轴承1适用于航空航天应用。航空航天轴承在特别艰苦的条件下运转,因此可能会相对迅速地失效。结果,飞行器(aircraft)维修(/维护)指南规定了频繁的检查间隔。有利地,鉴于根据本发明的轴承衬套4的低磨损率,可以增大更换航空航天轴承1之间的平均时间。
上面参照附图详细描述了本发明的代表性非限制性示例。该详细描述仅旨在教导本领域技术人员用于实践本教导的优选方面的更多细节,而无意于限制本发明的范围。另外,上面公开的每个附加特征和教导可以单独使用或与其他特征和教导结合使用,以提供改进的轴承衬套和轴承。
此外,上述代表性示例以及各个独立权利要求和从属权利要求中的各个特征可以以未具体和明确列举的方式进行组合,以提供本教导的其他有用的实施方式。
Claims (8)
1.一种轴承衬套(4),包括:
-第一织物(9),具有预先浸渍有粘合剂(12)的纤维片材(11),以及
-第二织物(10),浸渍有所述粘合剂(12),并且具有带有润滑纤维(14)的轴承元件接触表面(13)以及支撑所述轴承元件接触表面(13)的结构纤维(15),
其特征在于,所述纤维片材(11)和粘合剂(12)包含导电填料。
2.根据权利要求1所述的轴承衬套,其特征在于,所述导电填料包括石墨填料和/或金属填料和/或碳填料。
3.根据权利要求2所述的轴承衬套,其特征在于,所述粘合剂(12)包括至少2wt.%的石墨填料。
4.根据前述权利要求中的任一项所述的轴承衬套,其特征在于,所述粘合剂(12)包括树脂。
5.根据前述权利要求中的任一项所述的轴承衬套,其特征在于,所述润滑纤维(14)包括PTFE。
6.根据前述权利要求中的任一项所述的轴承衬套,其特征在于,所述结构纤维(15)包括10wt.%至30wt.%的玻璃和/或碳和/或聚酯和/或芳族聚酰胺,以及70wt.%至90wt.%的PTFE。
7.一种轴承,包括内圈(2)、外圈(3)以及根据前述权利要求中的任一项所述的轴承衬套(4),在此所述轴承衬套(4)布置在所述内圈(2)与所述外圈(3)之间。
8.一种制造根据权利要求1至6中的任一项所述的轴承衬套(4)的方法,包括以下步骤:
(a)提供第一织物(9),所述第一织物(9)包括预先浸渍有粘合剂(12)的纤维片材(11),所述纤维片材(11)和粘合剂(12)包含导电填料,
(b)提供第二织物(10),所述第二织物(10)包括具有润滑纤维(14)的轴承元件接触表面(13)以及支撑所述轴承元件接触表面(13)的结构纤维(15),以及
(c)在高温下使所述第一织物(9)和所述第二织物(10)接触并压缩在一起,诸如,所述第一织物(9)中的粘合剂(12)中的至少一些粘合剂转移到所述第二织物(10)并且浸渍所述第二织物(10)。
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EP19175443.1A EP3742013A1 (en) | 2019-05-20 | 2019-05-20 | Electrically conductive and self-lubricating bearing liner, bearing containing the same, and method of manufacturing such a bearing liner |
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EP3751161B1 (en) * | 2019-06-14 | 2023-09-27 | Safran Landing Systems UK Ltd | Self-lubricating bush assembly |
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JP6072408B2 (ja) * | 2011-09-22 | 2017-02-01 | Ntn株式会社 | 滑り軸受および画像形成装置 |
GB201410486D0 (en) | 2014-06-12 | 2014-07-30 | Skf Ab | Bearing liner |
DE102016115619A1 (de) * | 2016-08-23 | 2018-03-01 | Federal-Mogul Deva Gmbh | Gleitbolzen und Steckkupplung mit Gleitbolzen |
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CN114704552B (zh) * | 2022-03-30 | 2023-06-20 | 深圳大学 | 一种载流固体薄膜润滑轴承及其摩擦力控制方法 |
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