CN202305043U - 一种防轴电压、轴电流的轴瓦测温热电阻 - Google Patents

一种防轴电压、轴电流的轴瓦测温热电阻 Download PDF

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CN202305043U
CN202305043U CN2011203688161U CN201120368816U CN202305043U CN 202305043 U CN202305043 U CN 202305043U CN 2011203688161 U CN2011203688161 U CN 2011203688161U CN 201120368816 U CN201120368816 U CN 201120368816U CN 202305043 U CN202305043 U CN 202305043U
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bearing bush
thermal resistor
temperature
thermal resistance
shaft
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王丽杰
闫永胜
侯俊卿
樊波红
闫祥生
史登跃
杨红里
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Aluminum Corp of China Ltd
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Aluminum Corp of China Ltd
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Abstract

一种防轴电压、轴电流的轴瓦测温热电阻,涉及一种电机轴瓦温度测量装置。其测温热电偶的结构包括:棒状的铠装热电阻和热电阻固定件;其特征在于其固定件为采用尼龙棒加工的固定件;在铠装热电阻与轴瓦接触的部位涂有耐高温、耐油、防腐绝缘导热材料层。本实用新型的一种防轴电压、轴电流的轴瓦测温热电阻,采用尼龙棒加工固定件替代原来的金属固定件;在铠装热电阻与轴瓦接触的部位涂上0.2mm的耐高温、耐油、防腐绝缘导热材料(环氧改性有机硅树脂)。通过改进风机轴瓦测温元件与轴瓦之间的连接,改善电机轴瓦与热电阻之间的导热性能;保证电机轴瓦与热电阻之间的彻底绝缘,防了止轴电压、轴电流对热电阻测温的影响。

Description

一种防轴电压、轴电流的轴瓦测温热电阻
技术领域
一种防轴电压、轴电流的轴瓦测温热电阻,涉及一种电机轴瓦温度测量装置。 
背景技术
风机是氧化铝焙烧生产工艺的核心设备,对风机电机的保护措施又是风机电机安全、稳定、高效运行的重要保证,其中对电机轴瓦温度的监测就是保护措施中一项。有资料显示“电动机的轴电压、轴电流是由于环绕电动机轴的磁路不对称、转子运转不同心、感生脉动磁通等原因所产生的,它会使轴—轴承—机座的回路有轴电流流通,在电动机转子轴两端、轴与轴承之间、轴与轴承对地形成称为轴电压。根据轴承的种类不同,其耐电压程度有所不同,若超过轴承所允许的值,会通过油膜放电或者导电,会在轴瓦和轴承处产生点状微孔,并在底部产生发黑现象。严重时会使轴和轴承受到损坏,运行中伴随着强烈的噪声及设备外壳带电等。” 在氧化铝生产的焙烧炉风机电机在运行过程中,经常会出现一侧轴瓦温度高报跳停电机的故障,但通过现场实地监测,并没有发现电机轴瓦有什么异常,也没有温度升高的迹象,而通过热电阻测出来的温度却有变化,并且会徒然升高。查找温度误报的原因和排除影响温度测量的因素成了急需解决的难题。经反复论证影响温度测量最可能的因素是电机在运行过程产生的轴电压或轴电流。 
发明内容
本实用新型的目的就是针对上述已有技术存在的不足,提供一种能有效改善电机轴瓦与热电阻之间的导热性能;防止轴电压、轴电流对热电阻测温结果产生影响的防轴电压、轴电流的轴瓦测温热电阻。 
上述目的是通过下述方案实现的。 
一种防轴电压、轴电流的轴瓦测温热电阻,其测温热电偶的结构包括:棒状的铠装热电阻和热电阻固定件;其特征在于其热电阻固定件为采用尼龙棒加工的固定件,在铠装热电阻与轴瓦接触的部位涂有耐高温、耐油、防腐绝缘导热材料层。 
本实用新型的一种防轴电压、轴电流的轴瓦测温热电阻,其特征在于所述的耐高温、耐油、防腐绝缘导热材料层为0.2mm 的环氧改性有机硅树脂。 
本实用新型的一种防轴电压、轴电流的轴瓦测温热电阻,采用尼龙棒加工固定件替代原来的金属固定件;在铠装热电阻与轴瓦接触的部位涂上0.2mm 的F46耐高温、耐油、防腐绝缘导热材料。通过改进风机轴瓦测温元件与轴瓦之间的连接,改善了电机轴瓦与热电阻之间的导热性能;保证了电机轴瓦与热电阻之间的彻底绝缘,防止了轴电压、轴电流对热电阻测温的影响。
附图说明
图1本实用新型的结构示意图。 
具体实施方式
一种防轴电压、轴电流的轴瓦测温热电阻,其测温热电偶的结构包括:棒状的铠装热电阻1和热电阻固定件2;其热电阻固定件为采用尼龙棒加工的固定件;在铠装热电阻与轴瓦接触的部位涂有耐高温、耐油、防腐绝缘导热材料层3;所述的耐高温、耐油、防腐绝缘导热材料层为0.2mm 的环氧改性有机硅树脂。 
操作时,按照固定件尺寸螺纹间距,孔径,用尼龙棒在车床上进行加工。加工好后将原来的金属固定件替换下来。将制作好的铠装热电阻在其表面涂上0.2mm 的F46耐高温、耐油、防腐绝缘导热材料。测量时,无轴电压、轴电流热电阻测温的影响发生。 

Claims (2)

1.一种防轴电压、轴电流的轴瓦测温热电阻,其测温热电偶的结构包括:棒状的铠装热电阻和热电阻固定件;其特征在于其热电阻固定件为采用尼龙棒加工的固定件;在铠装热电阻与轴瓦接触的部位涂有耐高温、耐油、防腐绝缘导热材料层。
2.根据权利要求1所述的一种防轴电压、轴电流的轴瓦测温热电阻,其特征在于所述的耐高温、耐油、防腐绝缘导热材料层为0.2mm 的环氧改性有机硅树脂。
CN2011203688161U 2011-09-30 2011-09-30 一种防轴电压、轴电流的轴瓦测温热电阻 Expired - Fee Related CN202305043U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11569712B2 (en) 2021-04-05 2023-01-31 General Electric Renovables Espana, S.L. System and method for detecting bearing insulation and ground brush health in a generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11569712B2 (en) 2021-04-05 2023-01-31 General Electric Renovables Espana, S.L. System and method for detecting bearing insulation and ground brush health in a generator

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