固体颗粒对扇形雾喷头的冲蚀磨损分析
- 文件大小:443.17KB
- 浏览次数:
- 发布时间:2014-03-19
本资料包含pdf文件1个,下载需要1积分
由于冲蚀磨损对喷雾质量产生影响,造成喷头磨损失效。通过对扇形雾喷头球头处固体颗粒的运动状态、边界层上颗粒受力、运动速度和攻角的分析,解释了扇形雾喷头的冲蚀磨损机理。并建立了扇形雾喷头球头处材料流失体积与攻角的关系式。结果表明,在扇形雾喷头处,当固体颗粒冲击位置的轴向尺寸小于其轴向临界尺寸时,攻角随轴向尺寸的增加而增大;反之,攻角随轴向尺寸的增加而减小。分析发现,扇形雾喷头喷口处磨损程度随喷头内表面轴向尺寸的增加而增加。在扇形雾喷头喷口短轴处,轴向尺寸最大,固体颗粒的攻角最小,磨损最严重。并通过喷头冲蚀磨损试验,试验结果与理论分析一致。该文对分析喷头磨损规律,计算磨损率和磨损失效预测提供了基础依据。 The problem of spray quality of nozzle affected by erosion wear can cause the flat-fan spraying were invalid. The solid particles' properties on its motion, the forces, the kinematical velocity and the attack angle of the particles in boundary-layer were discussed. Then the hydraulic abrasion mechanism of the flat-fan spraying nozzles was analyzed. The volume losses of nozzles material relationship was established with the attack angle change of the spherical-top of flat-fan orifices. It was indicated that the attack angle increased with axial size increasing, when axial size of solid particles impact position was less than its critical dimension, on the contrary the attack angle decreased with axial size increasing at fan-shaped spraying nozzle. Wear degree of fan-shaped spraying nozzle increased with axial size of nozzle inner surface increasing. And the most serious wear was in the minor-axis of the spherical-top of flat-fan orifices because the least attack angle. Finally, the theoretical analysis was verified through erosion wear test of the flat-fan spraying nozzles. The results provide a reference for analyzing wear characteristics, calculating wear rate and forecasting erosion loss of the flat-fan nozzles.
- 1某利源针织有限公司施工组织设计
- 2XWS-JM电气火灾监控探测器概述
- 3房屋建筑和市政基础设施工程档案资料管理规范(2012江苏DB)
- 4法向压力对销-盘在电磁场环境下耦合温度场的影响
- 5世家精品酒店室内装修施工平面图CAD
- 6全套建筑脚手架节点CAD图34个
- 7梁平县某私人别墅地源热泵空调设计施工图
- 8技术参数参照标准.doc - 广东参数参照标准
- 9薛城小沙河节制闸施工图设计报告
- 10不同冠间配合叶盘系统振动响应局部化问题研究
- 11超级英雄飞车中望3D设计
- 12山西某住宅雨季施工措施
- 1300SJ202建筑坡屋面构造
- 14交流电气装置的接地
- 15小型自动恒温控制器 KTS 011 SolidWorks设计