Severity: Notice
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File: D:\database\translate.php
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Function: _error_handler
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File: D:\database\translate.php
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Function: _error_handler
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Function: lang
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File: D:\database\translate.php
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Function: _error_handler
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Function: lang
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Filename: database/translate.php
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File: D:\database\translate.php
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Function: _error_handler
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Function: lang
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File: D:\database\translate.php
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Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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File: D:\database\translate.php
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Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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2024-08-02
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File: D:\database\translate.php
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Function: _error_handler
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File: D:\database\translate.php
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Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: _error_handler
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赵成明
（中材装备集团有限公司）
都江堰拉法基水泥有限公司一线Φ4.8m回转窑窑头罩产生向窑尾方向的轴向移动。
1 存在的问题
回转窑是由德国洪堡公司供货（见图1）,密封形式是弹簧压杆式端面密封，由于密封端面受到窑头罩持续的推力作用，密封结构逐渐损坏，弹簧压杆已经处于半脱落状态，密封即将失效。
图1 原密封变形情况
2 原因分析及解决方案
初步分析，怀疑窑头罩的移动与2008年的地震有关，地震导致设备基础产生倾斜，进而使窑头罩发生缓慢移动。
鉴于对窑头罩的移动原因还未确定，为保障生产的进行，先行更换窑头密封。因周向密封不会因窑头罩的移动而损坏，因此选择了传统周向密封结构——碟片式密封。
碟片密封采用钢丝绳拉紧，密封静环与窑头罩焊接，密封动环与风冷套通过螺栓连接。同时，原设计中的风冷套结构不适用于新的方案，也一并更换。
3 方案的实施
原设计的窑头密封设计方案见图2，挡块1、2、3、5、6焊接在筒体上，挡块4焊在风冷套上，风冷套扣在窑头护板上，挡块4与挡块2抵住，并通过挡块1上的螺栓向左拉紧风冷套。挡块1、2、3用于承担风冷套的预紧力，挡块5、6的作用则是约束风冷套的周向转动。
图2 窑头密封设计方案
现场安装时，由于工期比较紧，并没有预留出窑头护板的拆卸时间，窑头罩也仅是做了复位，不能过度移动，导致挡块2、3的焊接空间较小，很难保证焊接精度。但如果焊接误差过大，挡块2、3很难起到原设计中的作用，风冷套的预紧就会出现问题。因此，我们对原方案挡块部分进行了改进，见图3。
图3 窑头风冷套挡块改进结构
1）挡块2焊接在风冷套的挡块4上。
2）改变靠近窑头护板的挡块5的尺寸和形状，挡块5抵近挡块2，使其既起到限制风冷套周向转动的作用，又能承担风冷套的轴向预紧力。同时，在套上风冷套之后再焊接挡块，既减小了焊接的难度，又保证了焊接的精度。
4 现场使用情况
改造后的窑头密封密封性好，同时，周向密封结构也不会因为窑头罩的移动而损坏，在暂时无法确定窑头罩移动原因的情况下，解决了窑的密封问题，保证了生产进度。
来源：《水泥》杂志
（版权归原作者或机构所有）
Severity: Notice
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File: D:\database\translate.php
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Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
File: D:\wwwroot\sebberzc.com\application\controllers\news.php
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Function: view
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File: D:\database\translate.php
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Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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Backtrace:
File: D:\database\translate.php
Line: 69
Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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Function: require_once
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Message: Use of undefined constant APP_ID - assumed 'APP_ID'
Filename: database/translate.php
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File: D:\database\translate.php
Line: 64
Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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File: D:\database\translate.php
Line: 69
Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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File: D:\database\translate.php
Line: 69
Function: _error_handler
File: D:\wwwroot\sebberzc.com\application\views\news\knowledgePage.php
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Function: lang
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