CN107299847A - 调节尾气阻力的无黑烟尾气过滤器 - Google Patents
调节尾气阻力的无黑烟尾气过滤器 Download PDFInfo
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Abstract
本发明涉及一种调节尾气阻力的无黑烟尾气过滤器。它包括过滤箱(1)、备用载体(9)、盖板(10)、支撑板(11)、压簧(12)和轴(8),所述过滤箱(1)内设置有过滤网(2)和陶瓷蜂窝载体(3),过滤网(2)上设置有斜向的压折(2.1)和纵向的压凸(2.2)。本发明一种调节尾气阻力的无黑烟尾气过滤器,在过滤网和陶瓷蜂窝载体两级过滤下,将主要成分为CO、HC、NOx的尾气,反应成CO2、H2O、N2和O2,同时隔壁上的微孔能有效过滤废气中的黑烟颗粒,并在催化剂涂层的作用下黑烟颗粒会被燃烧掉,过滤箱内的压力可以随时调整,保证了发动机的稳定运行。
Description
技术领域
本发明涉及一种调节尾气阻力的无黑烟尾气过滤器,用于汽车尾气净化。属于汽车设备技术领域。
背景技术
目前,普通的汽车尾气过滤器,很多都是经过简单的过滤直接排出,而配备柴油发动机的汽车,其尾气中含有黑烟颗粒,现有的尾气过滤器不能有效过滤黑烟颗粒,这样会造成环境污染。
尾气过滤器进行处理后才能排放,长时间使用后,有一些不可再生的杂质会附着在过滤载体的内壁上,增大尾气排放的阻力,如此会造成发动机的功率下降,有安全隐患。
发明内容
本发明的目的在于克服上述不足,提供了一种调节尾气阻力的无黑烟尾气过滤器,此尾气过滤器在过滤汽车尾气中的CO、HC、NOx有害气体的同时也能过滤黑烟颗粒,并在高温下黑烟颗粒会逐步燃烧而氧化;过滤箱内的压力可以随时调整,使得尾气排放通畅,不会影响发动机的功率。
本发明的目的是这样实现的:
一种调节尾气阻力的无黑烟尾气过滤器,包括过滤箱,其特点是:所述过滤箱内设置有过滤网和陶瓷蜂窝载体,过滤网上设置有斜向的压折和纵向的压凸,所述过滤箱包括第一圆弧边、第二圆弧边、第一斜边和第二斜边,所述第一圆弧边、第二斜边、第二圆弧边和第一斜边依次首尾相连,相连处采用圆角过渡,所述陶瓷蜂窝载体沿轴线方向密布有气孔,所述气孔的一端为开口,另一端设置有封堵面,所述封堵面和开口间隔布置,所述相邻两个气孔设置有隔壁,隔壁上开有呈蜂窝状的微孔,隔壁上涂覆有催化剂涂层,所述尾气过滤器还包括备用载体、盖板、支撑板、压簧和轴,备用载体与陶瓷蜂窝载体并排布置,轴的一端通过支撑板与过滤箱相抵,轴的另一端与盖板连接,盖板与备用载体的尾气出口端配合,压簧套设在轴上,其一端与盖板相抵,另一端与过滤箱的内壁相抵。
本发明一种调节尾气阻力的无黑烟尾气过滤器,其气孔的孔数为600孔/平方英寸。
本发明一种调节尾气阻力的无黑烟尾气过滤器,其隔壁的厚度为0.13~0.14mm。
与现有技术相比,本发明的有益效果是:
本发明一种调节尾气阻力的无黑烟尾气过滤器,在过滤网和陶瓷蜂窝载体两级过滤下,将主要成分为CO、HC、NOx的尾气,反应成CO2、H2O、N2和O2,同时隔壁上的微孔能有效过滤废气中的黑烟颗粒,并在催化剂涂层的作用下黑烟颗粒会被燃烧掉,进一步提高了尾气净化效果,当过滤箱内的压力超过允许值时,此压力会顶开盖板,尾气从备用载体排出,从而解决了尾气排放阻力大的问题,使得发动机稳定运行。
附图说明
图1为本发明一种调节尾气阻力的无黑烟尾气过滤器的结构示意图。
图2为图1的左视图。
图3为本发明的陶瓷蜂窝载体的截面示意图。
图4为本发明的陶瓷蜂窝载体的部分轴向截面图。
图5为本发明的陶瓷蜂窝载体的隔壁的结构示意图。
图6为本发明的过滤网的结构示意图。
图7为本发明的过滤网的展开图。
图8为图6中A的放大图。
图9为图1中B的放大图。
图中:
过滤箱1,
第一圆弧边1.1,
第二圆弧边1.2,
第一斜边1.3,
第二斜边1.4,
过滤网2,
压折2.1,
压凸2.2,
陶瓷蜂窝载体3,
气孔3.1,
封堵面3.2,
隔壁3.3,
微孔3.4,
催化剂涂层3.5
开口3.6,
尾气进口4,
尾气出口5,
尾气6,
气流通道7,
轴8,
备用载体9,
盖板10,
支撑板11,
压簧12。
具体实施方式
参见图1-9,本发明涉及一种调节尾气阻力的无黑烟尾气过滤器,它包括过滤箱1、过滤网2和陶瓷蜂窝载体3,过滤箱1的左端为尾气进口4,右端为尾气出口5,所述过滤网2和陶瓷蜂窝载体3设置在过滤箱1内,过滤网2设置在靠近尾气进口4处。
所述过滤网2采用不锈钢材料制成,过滤网2上设置有斜向的压折2.1和纵向的压凸2.2,图7为过滤网2的展开图,途中横向为过滤网2卷起来时的轴向,纵向为过滤网2卷起来时的径向,使用时,将过滤网2卷绕后安装在过滤箱1内,压折2.1和过滤网2本体形成气流通道7,气流通道7交汇处形成多个菱形扩张槽,并且每隔一段距离由压凸2.2形成一个隔断,当发动机尾气吹向气流通道7时,一部分沿气流通道7分流,一部分透过过滤网2本体过滤,沿气流通道7分流的部分尾气在经过扩张槽和隔断时会产生不同程度的紊流,形成多个方向的分流,使尾气中的黑烟颗粒能够充分捕集在过滤网2本体上,当黑烟颗粒捕集到一定量时,在发动机排气的高温下会燃烧形成CO2,从而实现过滤器再生的功能。
所述过滤箱1包括第一圆弧边1.1、第二圆弧边1.2、第一斜边1.3和第二斜边1.4,所述第一圆弧边1.1、第二斜边1.4、第二圆弧边1.2和第一斜边1.3依次首尾相连,相连处采用圆角过渡,所述陶瓷蜂窝载体3的形状与过滤箱1对应,且陶瓷蜂窝载体3沿轴线方向密布有气孔3.1,所述气孔3.1的一端为开口3.6,另一端设置有封堵面3.2,所述封堵面3.2和开口3.6间隔布置,所述相邻两个气孔3.1设置有隔壁3.3,隔壁3.3上开有呈蜂窝状的微孔3.4,隔壁3.3上涂覆有催化剂涂层3.5。
其中,气孔3.1的孔数为600孔/平方英寸,隔壁3.3的厚度为0.13~0.14mm。
所述过滤器还包括备用载体9、盖板10、支撑板11、压簧12和轴8,备用载体9与陶瓷蜂窝载体3并排布置,轴8的一端通过支撑板11与过滤箱1相抵,轴8的另一端与盖板10连接,盖板10与备用载体9的尾气出口配合,压簧12套设在轴8上,其一端与盖板10相抵,另一端与过滤箱1的内壁相抵。
正常情况下,盖板10封住备用载体9的尾气出口,当过滤箱1内的压力超过允许值时,此压力会顶开盖板10,尾气从备用载体9排出,从而解决了尾气排放阻力大的问题,使得发动机稳定运行。
工作原理:本发明采用堇青石质制作成蜂窝陶瓷载体,并内置在柴油机尾气净化器内,柴油发动机排出的带有黑烟颗粒的废气尾气进口4进入,经过过滤网2的一级过滤,然后进入陶瓷蜂窝载体3进行二级过滤,从气孔3.1的开口3.6进入,由于气孔3.1在一端是开口3.6,而在另一端则是封堵面3.2,因此废气会通过带有微孔3.4的隔壁3.3,然后从相邻气孔3.1的开口3.6排出,由于黑烟颗粒的直径较微孔3.4大,因此废气中的黑烟颗粒将被过滤捕捉在隔壁3.3上,气流则从微孔3.4穿过。
所述催化剂涂层3.5含有贵金属的活性稀土,主要成份有Pt、Pd、Rh、Al2O3、Ce、La、Zr、Cu、Mn ,柴油燃烧的废气(主要为CO、HC、NOx等有害气体)穿过微孔3.4时,涂覆在隔壁3.3上的催化剂涂层3.5将增强CO、HC、NOx三种气体的活性,促使其进行一定的氧化-还原化学反应,其中CO在高温下氧化成无色无毒的二氧化碳气体,HC化合物在高温下分解成水(H2O)和二氧化碳,NOx还原成氮气和氧气。
当柴油机排气温度达到375 摄氏度时,在催化剂涂层3.5的作用下,隔壁3.3上的黑烟颗粒会逐步燃烧而氧化,黑烟颗粒的净化率约达到85% 以上,当反应温度达到500 摄氏度时催化剂和黑烟颗粒反应从而完全燃烧掉(催化燃烧),此时黑烟颗粒的净化率可达90% 以上。
Claims (3)
1.一种调节尾气阻力的无黑烟尾气过滤器,包括过滤箱(1),其特征在于:所述过滤箱(1)内设置有过滤网(2)和陶瓷蜂窝载体(3),过滤网(2)上设置有斜向的压折(2.1)和纵向的压凸(2.2),所述过滤箱(1)包括第一圆弧边(1.1)、第二圆弧边(1.2)、第一斜边(1.3)和第二斜边(1.4),所述第一圆弧边(1.1)、第二斜边(1.4)、第二圆弧边(1.2)和第一斜边(1.3)依次首尾相连,相连处采用圆角过渡,所述陶瓷蜂窝载体(3)沿轴线方向密布有气孔(3.1),所述气孔(3.1)的一端为开口(3.6),另一端设置有封堵面(3.2),所述封堵面(3.2)和开口(3.6)间隔布置,所述相邻两个气孔(3.1)设置有隔壁(3.3),隔壁(3.3)上开有呈蜂窝状的微孔(3.4),隔壁(3.3)上涂覆有催化剂涂层(3.5),所述尾气过滤器还包括备用载体(9)、盖板(10)、支撑板(11)、压簧(12)和轴(8),备用载体(9)与陶瓷蜂窝载体(3)并排布置,轴(8)的一端通过支撑板(11)与过滤箱(1)相抵,轴(8)的另一端与盖板(10)连接,盖板(10)与备用载体(9)的尾气出口端配合,压簧(12)套设在轴(8)上,其一端与盖板(10)相抵,另一端与过滤箱(1)的内壁相抵。
2.根据权利要求1所述的一种调节尾气阻力的无黑烟尾气过滤器,其特征在于:所述气孔(3.1)的孔数为600孔/平方英寸。
3.根据权利要求1或2所述的一种调节尾气阻力的无黑烟尾气过滤器,其特征在于:所述隔壁(3.3)的厚度为0.13~0.14mm。
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