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离心泵各填料密封的检修方法

2024-07-18

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离心泵各填料密封的检修方法:

1、清洗排污泵填料箱,并检查轴表面是否有划痕、毛刺等。填料箱应清洗干净,轴表面应光滑。 

2、检查轴跳动,转子跳动的不平衡量应在允许范围内,以免振动过大,对填料不利。 

3、在填料箱内和轴表面涂密封剂或涂与介质相适应的润滑剂。 

4、对成卷包装的填料,用时先取根与轴颈尺寸相同的木棒,将填料缠绕其上,再用刀切断,刀口最好呈45°斜面。 

5、填料要逐根装填,不得一次装填几根。方法是取一根填料,涂以润滑剂,双手各持填料接口的一端,沿轴向拉开,使之呈螺旋形,再从切口外套入轴颈。不得沿径向拉开,以免接口不齐。 

6、取一只与填料箱同尺寸材质或较轴硬度低些的金属轴套,把填料推入箱的深部,并用压盖对轴套施加一定的压力,使填料得到预压缩。预压缩量为5%~10%,最大到20%。再将轴转动一周,取出轴套。 

7、以同样的方法,装填第二根、第三根。注意,当填料数为4~8根时,装填时应使接口相互错开90°;二根填料错开180°;3~6根错开120°,以防通过接口渗漏。 

8、最后一根填料装填完毕后,应用压盖压紧,但压紧力不宜过大。同时用手转动轴,使装配压紧力趋于抛物线分布。然后略放松一下压盖。 

9、进行运转试验,若不能密封,再压紧一些填料;若发热过大,将它放松一些。如此调到只呈滴状泄漏和发热不大时为止(填料部位的温度只能比环境温度高30~40℃),才可以正式投入使用。

安装填料密封件,应符合技术文件规定。如无规定,应符合下列要求: 

1、检查轴在密封部件处的径向跳动量,轴的允许径向跳动量在0.03~0.08mm范围内; 

2、液封环与轴套的直径间隙一般为1.00~1.50mm,液封环与填料箱的直径间隙一般为0.15~0.20mm; 

3、填料压盖与轴套的直径间隙一般为0.75~1.00mm,四周间隙应均匀; 

4、填料压盖与填料箱的直径间隙一般为0.10~0.30mm; 

5、有填料底环时,底环与轴套的直径间隙一般为0.70~1.00mm; 

6、填料压紧后,液封环进液孔应与液封管对准,或液封环稍偏向外侧; 

7、对于成卷包装的填料,用时先取一根与轴同尺寸的木棒,将填料缠绕其上,再用刀切断,切口最好呈45°斜面。

(来源:网络)