共查询到19条相似文献,搜索用时 218 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
<正> 本发明属于机器制造类,即发动机制造,具体为水冷内燃机气缸盖。 众所周知的液冷内燃机气缸盖包括冷却水腔和由喷咀套外表面与缸盖体垂直壁形成的环形通道,鼻梁区的径向圆柱形通道和进水通道。 然而这种结构不遵循冷却通道长度与截面的比例关系,因此液体高速流动不能实现,不能保证燃烧室顶板中部温度有根本的降低。所以这种缸盖在燃烧室顶板与边缘之间存在着很大的径向温差,由此引起高的温度应力和大的变形,降低了缸盖的工作可靠性。 相似文献
11.
12.
13.
基于强耦合理论的柴油机稳态传热计算 总被引:1,自引:0,他引:1
为了解决柴油机冷却水与机体组件之间的流动与传热问题,将强耦合理论应用于柴油机的稳态传热计算。建立了柴油机机体—缸盖—缸套—缸垫—冷却水腔的流—固耦合模型,通过内燃机工作过程仿真确定燃气侧的传热边界条件,进行了数值模拟。最终得到了冷却水腔内速度、压力、传热系数以及主要受热零部件的温度分布情况。 相似文献
14.
汽油机水套能保证冷却液在其内部循环从而带走发动机产生的热量。文章基于车型匹配需求,将一款汽油机的布置形式由横置改为纵置,根据散热器出水口位置设定了2种方案,并对其水套进行CFD分析,以确定最佳的方案。文章使用FIRE软件分析了2种方案中水套的流速、换热系数及其分布情况。结果表明:从气缸体和气缸盖的流体速度大小和分布均匀性来看,方案Ⅱ优于方案Ⅰ;从气缸体和气缸盖的换热系数值大小和分布均匀性来看,方案Ⅱ优于方案Ⅰ。因此,方案Ⅱ的冷却水套能达到更佳的冷却效果。 相似文献
15.
16.
17.
18.
《JSAE Review》2002,23(1):15-20
Experiments on a small, one-cylinder high-speed diesel engine were performed by changing the temperature of cooling water and also by changing the material and configuration of the cylinder head gaskets. Three kinds of cylinder head gaskets were made. The temperature was abruptly changed and the temperatures at several points of the cylinder head gasket and its peripheral region, the relative displacement between cylinder head and cylinder block, the loads of the cylinder head bolts, the indicator diagram, the pressure of gasket surface and combustion gas leakage were measured. The sealing characteristics in the transient state and the steady state of the cooling water temperature were investigated from an experimental standpoint. The effect of the temperature differences between the cylinder head, cylinder block and head bolts on the loads of the head bolts and the relative displacement between the cylinder head and cylinder block were observed for the test gaskets. 相似文献