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预防ntn非标轴承被侵蚀对寿命影响须掌握几点事项

ntn轴承因使用环境的不同,所以被侵蚀的表现也是不同的,因为侵蚀方式不同。轴承当然也逃不掉这个被侵蚀的宿命,下面就来讲一讲非标轴承被侵蚀的三种方式。
1、气蚀
ntn轴承的气蚀是固体表面与液体接触并作相对运动时所产生的表面损伤形式。当润滑油在油膜低压区时,油中会形成气泡,气泡运动到高压区后,在压力作用下气泡溃灭,在溃灭的瞬间产生极大的冲击力和高的温度,固体表面在这冲击力的反复作用下,材料发生疲劳脱落,使摩擦表面出现小凹坑,进而发展成海绵状伤痕。 重载、高速,且载荷和速度变化较大的非标轴承中,常发生气蚀;
2、流体侵蚀
ntn轴承的流体侵蚀是指流体激烈地冲击固体表面会造成流体侵蚀,使固体表面上出现点状伤痕,这种损伤的表面较光滑;
3、电侵蚀
ntn轴承的电侵蚀是指由于电机或电器漏电,在非标轴承摩擦表面间产生电火花,在摩擦表面上造成点状伤痕,其特征是损伤往复出现在较硬的轴颈表面上。
要想预测ntn轴承的疲劳寿命,判断剩余寿命,就需了解所有的轴承疲劳破坏现象,为此将花费很长时间。然而,由于滚动疲劳是在接触点的压应力下发生的疲劳,要达到破损将发生极大的材料变化。因此,除了表面出现早期裂纹、滚道遭受化学影响、裂纹的扩展先于材料变化的情况外,检测材料变化就可能判断非标轴承的疲劳度。
保养ntn轴承还必须要掌握以下几点:
1、 定期检查使用状态,注意观察部位是否有异常响声和局部急剧温升现象;
2、 按要求定期、定量加注润滑油或润滑脂;
3、 根据车辆使用状况,至少每半年要彻底更换一次润滑油,并对进行仔细检查;
4、 维护状态下的检查方法:把拆卸下的用煤油或汽油清洗干净,仔细观察内外圆柱面是否有滑动或蠕动现象,内外滚道面有无剥落、点蚀状况,滚动体和保持架是否磨损和变形等,根据非标轴承检查的综合情况,判断是否能够继续使用。
解析ntn塑料轴承负荷导致的升温四大因素和预防措施
ntn转盘轴承运转震动损伤检查方法

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