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简析两大经典球磨机轴承位磨损修复案例

2024-11-06

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球磨机长期运行过程中,轴承位磨损是较为常见的问题,部分厂家因生产任务紧急急需恢复生产,传统的刷镀、补焊机加工等方法无法实现在线修复,且易对轴承造成二次伤害。文中提到的方法为高分子复合材料在线修复的方法,结合设备损坏情况,采用刮研法、模具法等修复工艺在线修复,修复用时短,性价比高。

应用案例一、矿山球磨机轴承位磨损在线修复

某矿山企业球磨机轴承位出现磨损现象,轴承位直径895mm,宽度240mm,单边磨损量1mm左右。设备在生产过程中因润滑问题导致轴承过热抱死,拆卸轴承检查发现轴承位已经出现磨损,企业与我司取得联系,希望我们的技术能为其在现场实施修复。

结合设备损坏情况,最终决定采用福世蓝刮研法修复工艺实施修复。由于轴承较大,加热比较麻烦,考虑到轴承内圈是可分离的,单独对轴承内圈进行加热进行热装工艺,冷却后安装轴承其他部分。总计耗时8个小时恢复了轴承的安装,为企业节省了宝贵的停机时间。

具体工艺如下:

1.   使用氧气乙炔对磨损的球磨机轴承室进行烤油,直至无火星四射;

2.   使用磨光机对待修复位置进行打磨,直至露出金属原色;

3.   使用无水乙醇擦拭轴承位表面,确保表面干净、干燥、坚实;

4.   调和适量福世蓝2211F高分子复合材料,涂抹至待修复表面,先薄薄涂抹一层并反复刮研,确保材料压进表面上的任何微孔;

5.   使用样板尺沿基准面进行刮研;

6.   待材料固化后,使用砂带打磨去除高点;

7.   再次调和少量2211F高分子复合材料,再薄薄涂抹一层;

8.   加热轴承,加热完成后在轴承内表面刷涂薄薄一层脱模剂,快速安装轴承。 

应用案例二、大轴径球磨机轴承位磨损在线修复

此台球磨机造成轴单边磨损0.7mm,后轴肩磨损10mm。已经无法正常的运转。

设备参数:

轴径直径:1400mm,宽:350mm

部件材质:碳钢

设备转速:30~50r/min左右

磨损尺寸:单边磨损0.7mm

配合形式:过盈配合

设备自重:400多吨,添加钢球重量200多吨

修复工艺如下:

1、做好修复球磨机轴承位前的准备工作,如工具、材料及定位样板尺等;

2、用做好的样板尺确定球磨机轴径磨损修复定位点及高度;

3、修复表面进行烤油和糙化处理,使表面干净、干燥、结实;

4、严格按比例调和福世蓝高分子复合材料2211F,并充分混合直至颜色均匀一致没有色差;

5、在球磨机轴承位磨损位置涂抹高分子材料,厚度率高于磨损尺寸;

6、热装轴承,进行足够时间的固化材料,具体固化时间根据现场温度并参照材料技术数据表而定。

(来源:福世蓝)