The invention discloses a main board of an EGR cooler, which is provided with one or more groups of perforations matching the cooling tube, and is characterized by flanging around the plate body, having flanges perpendicular to the plane of the plate body, and the thickness of the flanges is less than the thickness of the plate body. The flange can increase the contact area between the main board and the cooling pipe, thereby increasing the brazing area, making the welding between the main board and the cooling pipe more firm, avoiding the excessive concentration of local stress, resulting in deformation failure, and prolonging the service life of EGR cooler. Because the flange is directly set on the perforation of the main board, no additional parts are needed, so the manufacturing cost will not be increased on the premise of solving the welding fastness. The thickness of the flange is less than the thickness of the plate body, and the channel width between adjacent flanges can be opened, which is beneficial to the medium flow.
【技术实现步骤摘要】
一种EGR冷却器及其主板
本专利技术涉及热交换器
,尤其涉及发动机废气再循环冷却器领域,具体地说是一种EGR冷却器及其主板。
技术介绍
废气再循环技术是辅助柴油机实现排放升级、辅助汽油机降低油耗的一种重要技术路线。废气再循环进入发动机气缸之前需要通过废气再循环冷却器(简称EGR冷却器)冷却到一定温度。参照图1和图2,现有的EGR冷却器,包括两端气室1、两端主板2和中间的水壳体4;所述的水壳体4上设有进出水管3,水壳体4内设有一到多组冷却管5;所述的主板2上开设有一到多组穿孔203,所述的穿孔203与冷却管5一一对应。装配时,冷却管5的两端分别穿入一对主板的穿孔203内;主板2置于气室1的止口上,主板2的两侧分别与止口和水壳体4的端面相抵,主板2和水壳体4的周边与气室1的内壁相抵;将端气室1、两端主板2、水壳体4和冷却管5装配成组件后,通过钎焊焊接成一体。一般的EGR冷却器的主板2为一平主板结构,由于主板2通常与气室1和水壳体4同时相联接,当气室1与平主板2出现高温热膨胀时会受到温度相对低的水壳体4的约束而产生变形。变形严重时,在平主板2、水壳体4、气室1相连 ...
【技术保护点】
1.一种EGR冷却器主板,包括板体,所述的板体上开设有一到多组与冷却管相适配的穿孔,其特征在于所述的板体周边具有翻边;所述的穿孔周边具有与板体平面垂直的凸缘,并且所述凸缘的厚度小于所述板体的厚度。
【技术特征摘要】
1.一种EGR冷却器主板,包括板体,所述的板体上开设有一到多组与冷却管相适配的穿孔,其特征在于所述的板体周边具有翻边;所述的穿孔周边具有与板体平面垂直的凸缘,并且所述凸缘的厚度小于所述板体的厚度。2.如权利要求1所述的一种EGR冷却器主板,其特征在于所述凸缘的厚度为所述板体的厚度的30%~60%。3.如权利要求2所述的一种EGR冷却器主板,其特征在于所述凸缘的厚度为0.2~0.6mm,所述板体的厚度为0.6~2mm。4.如权利要求1所述的一种EGR冷却器主板,其特征在于所述的穿孔和凸缘通过冲压拉伸变薄形成。5.如权利要求4所述的一种EGR冷却器主板,其特征在于所述的穿孔和凸缘通过两到多次冲压拉伸变薄形成。6.如权利要求1所述的一种...
【专利技术属性】
技术研发人员:王丹娟,张文锋,高建新,凌天峰,
申请(专利权)人:浙江银轮机械股份有限公司,
类型:发明
国别省市:浙江,33
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。