Purpose

This paper aims to elucidate the effects of lubricant groove shape, vertical load, swing angle and grease injection cycle on the friction and wear performances of journal bearings under the grease lubrication condition.

Design/methodology/approach

Three different types of lubricant grooves, namely, numeral eight-shaped, axial straight line-shaped and circular blind hole-shaped, were designed and machined in the bearing bush of journal bearings. The tribological behaviors of these journal bearings were investigated on the self-developed reciprocating swing friction and wear tester. Experimental data including the friction coefficient, the friction temperature, the wear loss and wear time were analyzed in detail. The wear morphologies of friction pairs were observed by scanning electron microscope and confocal laser scanning microscope.

Findings

The load carrying capacity and service life of the journal bearing with circular blind hole-shaped lubricant grooves are not affected. However, the load carrying capacities of journal bearings with numeral eight-shaped and axial straight line-shaped lubricant grooves are declined. The coverage areas of lubricating grease in the bearing bush are associated with the swing angle. The smaller the swing angle is, the more limited the coverage areas of lubricating grease get. Among these journal bearings, the maintenance-free time of journal bearing with circular blind hole-shaped lubricant grooves is the longest because of its large grease storage capacity.

Originality/value

The journal bearing with circular blind hole-shaped lubricant grooves exhibits the excellent antifriction and wear-resistant properties, making it suitable for the application in the low-speed and heavy-load engineering conditions.

中文翻译：

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脂润滑条件下润滑油槽形状对轴颈轴承摩擦学性能的影响

目的

本文旨在阐明润滑油槽形状，垂直载荷，摆动角度和注脂周期对脂润滑条件下轴颈轴承摩擦磨损性能的影响。

设计/方法/方法

在轴颈轴承的轴承衬套中设计并加工了三种不同类型的润滑剂槽，即数字八字形，轴向直线形和圆形盲孔形。在自行开发的往复式摆动摩擦和磨损测试仪上研究了这些轴颈轴承的摩擦学行为。详细分析了摩擦系数，摩擦温度，磨损量和磨损时间等实验数据。用扫描电子显微镜和共聚焦激光扫描显微镜观察摩擦副的磨损形态。

发现

带圆形盲孔形润滑槽的滑动轴承的承载能力和使用寿命不受影响。然而，具有数字八形和轴向直线形润滑剂槽的轴颈轴承的承载能力下降。轴承衬套中润滑油的覆盖面积与摆角相关。摆动角越小，润滑脂的覆盖范围越有限。在这些轴颈轴承中，具有圆形盲孔形润滑槽的轴颈轴承的免维护时间最长，因为其储脂量大。

创意/价值

带圆形盲孔形润滑槽的轴颈轴承具有出色的抗磨和耐磨性能，使其适用于低速和重载工程条件下的应用。