矿用隔爆型电气设备的防暴原理是什么?其防爆性能靠什么来保证?

2025-03-15 18:05:57
推荐回答(2个)
回答1:

有很多种方式
大体可以分为3类
第一类:填充型,把会产生电火花的空腔用阻燃材料(比如充油型,充砂型,浇封型,正压型应该也算)填满,不让爆炸性气体或粉尘进入,从而防止爆炸
第二类:安全型,包括本安型和增安型,通过合理的电路设计避免出现高温和电火花,从本质上防止爆炸
第三类:隔爆型,内部可能会发生爆炸,但接合面结构可以在火焰传出壳体之前将其冷却熄灭
(这个分类是我自己分的...仅供参考)
如何保证防爆性能,那就得看其是否按照标准进行了设计,生产和检验,可以参考国标【GB 3836.1~9】或者欧标【IEC 60079-0】欧标在有些指标上比较国标严格。

回答2:

利用间隙防爆原理设计制造,具有足够的机械强度,能耐受内部爆炸性混合物可能产生的最大压力,并通过严格控制结合面的间隙 宽度及加工光洁度,使电气设备外壳内部产生的电火花及爆炸不致引燃外部爆炸性混合物。
靠隔爆面长度,间隙厚度和隔爆面光洁度三个参数来保证

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