CN102518544B - 水轮发电机机壳防结露防腐结构及制备工艺 - Google Patents

水轮发电机机壳防结露防腐结构及制备工艺 Download PDF

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CN102518544B
CN102518544B CN201110448039.6A CN201110448039A CN102518544B CN 102518544 B CN102518544 B CN 102518544B CN 201110448039 A CN201110448039 A CN 201110448039A CN 102518544 B CN102518544 B CN 102518544B
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赵有文
花朝晖
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Chongqing Water Turbine Works Co Ltd
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Abstract

为克服灯泡贯流式水轮发电机结露对机壳及机壳内零部件的腐蚀并严重影响整机的运行安全和使用寿命等问题,本发明提出了一种水轮发电机机壳防结露防腐结构及制备工艺采用喷涂工艺在机壳内、外表面喷涂环氧底漆和保温隔热涂料形成防腐涂层及保温隔热层。本发明水轮发电机机壳防结露防腐结构的有益技术效果是处理后的机壳内、外表面既有防腐蚀的作用,又有保温隔热作用,能有效防止机壳内表面结露,减缓机壳及机壳内零部件的腐蚀,保障机组的正常运行,延长整机的使用寿命。

Description

水轮发电机机壳防结露防腐结构及制备工艺
技术领域
本发明涉及到水轮发电机机壳防腐结构及制备工艺,特别涉及到一种水轮发电机机壳防结露防腐结构及制备工艺。
背景技术
灯泡贯流式水轮发电机因其机壳(即灯泡头)整体浸泡在河水中,机壳外表面接触的是低温的河水。夏天,机壳体内空气温度高,相对湿度大,加之机壳内发电机运行时产生的热量使机壳内的温度持续升高,因而,机壳内水蒸气的含量也高。在热传导的作用下,机壳外部河水的低温使得机壳内表面的温度逐渐降低。当机壳内高温高湿产生的水蒸气接触到温度较低的机壳内表面并达到凝露临界点时,便从气态变成液态,在机壳内表面形成凝露水珠,即产生结露。由于灯泡贯流式水轮发电机机壳本身处于密封状态,结露的产生加重了机壳及机壳内零部件的腐蚀,严重影响到整机的运行安全和使用寿命。
发明内容
为克服灯泡贯流式水轮发电机结露对机壳及机壳内零部件的腐蚀并严重影响整机的运行安全和使用寿命等问题,本发明提出了一种水轮发电机机壳防结露防腐结构及制备工艺。本发明水轮发电机机壳防结露及防腐结构包括机壳内、外表面的防腐涂层及保温隔热层,其中,机壳外表面的防腐涂层和保温隔热层分别为环氧底漆和环氧沥青防锈漆,其厚度分别为50至150μm和160至260μm;机壳内表面的防腐涂层及保温隔热层分别为环氧底漆、保温隔热涂料和白色面漆,其厚度分别为50至150μm、1.0至3.0mm和25至45μm;其中,所述环氧底漆包括环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆;所述环氧沥青防锈漆包括厚浆环氧树脂漆或无溶剂环氧沥青防锈漆;所述保温隔热涂料包括环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料;所述白色面漆包括氯化橡胶磁漆或醇酸磁漆。
本发明水轮发电机机壳防结露防腐结构及制备工艺,包括以下主要步骤:
(1)机壳内、外表面喷砂除锈,达到《涂装前钢材表面锈蚀等级和除锈等级》(GB8923--1988)中的Sa2.5除锈标准;
(2)机壳内、外表面喷涂1至3道环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆,厚度为50至150μm;
(3)机壳外表面喷涂3至5道环氧沥青防锈漆或厚浆环氧树脂漆或无溶剂环氧沥青防锈漆,厚度为160至260μm;
(4)机壳内表面用高粘度涂布机喷涂1至3道环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料,厚度为1.0至3.0mm;
(5)机壳内表面喷涂1至3道白色氯化橡胶磁漆或醇酸磁漆,厚度为25至45μm。
本发明水轮发电机机壳防结露防腐结构及制备工艺的有益技术效果是处理后的机壳内、外表面既有防腐蚀的作用,又有保温隔热作用,能有效防止机壳内表面结露,减缓机壳及机壳内零部件的腐蚀,保障机组的正常运行,延长整机的使用寿命。
附图说明
附图1是本发明水轮发电机机壳防结露防腐结构的示意图。
下面结合附图和具体实施方式对本发明水轮发电机机壳防结露防腐结构及制备工艺做进一步说明。
具体实施方式
附图1是本发明水轮发电机机壳防结露防腐结构的示意图,图中,1为机壳,2为机壳外表面第一外涂层,3为机壳外表面第二外涂层,4为机壳内表面第一内涂层,5为机壳内表面第二内涂层,6为机壳内表面第三内涂层。由图可知,本发明水轮发电机机壳防结露防腐结构是在机壳的内、外表面涂覆保温隔热及防腐涂层,其中,机壳外表面的防腐保温隔热层包括第一外涂层环氧底漆和第二外涂层环氧沥青防锈漆,其厚度分别为50至150μm和160至260μm;机壳内表面的保温隔热防腐层包括第一内涂层环氧底漆、第二内涂层保温隔热涂料和第三内涂层白色面漆,其厚度分别为50至150μm、1.0至3.0mm和25至45μm;其中,所述环氧底漆包括环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆;所述环氧沥青防锈漆包括环氧沥青防锈漆或厚浆环氧树脂漆或无溶剂环氧沥青防锈漆;所述保温隔热涂料包括环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料;所述白色面漆包括氯化橡胶磁漆或醇酸磁漆。
本发明灯泡贯流式水轮发电机机壳防结露防腐结构制备工艺,包括以下步骤:
(1)机壳内、外表面喷砂除锈,达到《涂装前钢材表面锈蚀等级和除锈等级》(GB8923--1988)中的Sa2.5除锈标准;
(2)机壳内、外表面喷涂1至3道环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆,厚度为50至150μm;
(3)机壳外表面喷涂3至5道环氧沥青防锈漆或厚浆环氧树脂漆或无溶剂环氧沥青防锈漆,厚度为160至260μm;
(4)机壳内表面用高粘度涂布机喷涂1至3道环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料,厚度为1.0至3.0mm;
(5)机壳内表面喷涂1至3道白色氯化橡胶磁漆或醇酸磁漆漆,厚度为25至45μm。
显然,本发明灯泡贯流式水轮发电机机壳防结露防腐结构及制备工艺的有益技术效果是机壳外表面的涂层主要起防腐蚀的作用且兼有保温隔热作用,机壳内表面的涂层主要起保温隔热作用又兼有防腐作用。本发明保温隔热及防腐性能显著,能有效阻止低温河水通过传导使得机壳内表面的温度降低,防止机壳内表面“结露”的产生,减缓机壳及机壳内零部件的腐蚀,保障机组的正常运行,延长整机的使用寿命。

Claims (2)

1.一种灯泡贯流式水轮发电机机壳防结露及防腐结构,其特征在于:在机壳的内、外表面涂覆防腐及保温隔热层,其中,机壳外表面的防腐保温隔热层包括环氧底漆和环氧沥青防锈漆,其厚度分别为50至150μm和160至260μm;机壳内表面的保温隔热防腐层包括环氧底漆、保温隔热涂料和白色面漆,其厚度分别为50至150μm、1.0至3.0mm和25至45μm;其中,所述环氧底漆包括环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆;所述环氧沥青防锈漆包括环氧沥青防锈漆或厚浆环氧树脂漆或无溶剂环氧沥青防锈漆;所述保温隔热涂料包括环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料;所述白色面漆包括氯化橡胶磁漆或醇酸磁漆。
2.一种灯泡贯流式水轮发电机机壳防结露防腐结构制备工艺,其特征在于:该制备工艺包括以下主要步骤:
(1)机壳内、外表面喷砂除锈,达到《涂装前钢材表面锈蚀等级和除锈等级》(GB8923--1988)中的Sa2.5除锈标准;
(2)机壳内、外表面喷涂1至3道环氧富锌底漆或双组分环氧铁红底漆或环氧云铁中间漆,厚度为50至150μm;
(3)机壳外表面喷涂3至5道环氧沥青防锈漆或厚浆环氧树脂漆或无溶剂环氧沥青防锈漆,厚度为160至260μm;
(4)机壳内表面用高粘度涂布机喷涂1至3道环氧树脂保温隔热涂料或醇酸树脂保温隔热涂料,厚度为1.0至3.0mm;
(5)机壳内表面喷涂1至3道白色氯化橡胶磁漆或醇酸磁漆,厚度为25至45μm。
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