全氢罩式退火炉内罩结垢腐蚀分析与改善

根据某冷轧板厂全氢罩式退火炉内罩结垢腐蚀现象,从生产条件和接触的介质入手进行了分析、调研和取样化验,提出相应的改善措施,抑制腐蚀结垢现象的发生与恶化,从而提高罩式炉产能和内罩的使用寿命。     

师范院校舞蹈教学改革初探

随着我国教育体制的改组、联合、重组等形式进行深化改革,其教育体系、专业分布也发生了极大的变化。师范院校的舞蹈教育受传统观念、文化素质、课程设置等方面因素的制约,导致目前师范院校的舞蹈教育存在诸多不足和弊端。鉴于此．深化教学改革、提升教学质量、坚持教学创新、优化教学结构等成了当前师范院校舞蹈教学改革的当务之急,     

冷轧带钢退火粘结缺陷影响因素的研究及控制措施

文章在结合冷轧厂从轧制工艺、退火工艺到平整工艺等生产过程着重进行了时粘结缺陷的研究,目的是找出影响粘结产生的诸多因素,分析这些因素的影响方式及控制方法.     

金属防火罩

把一小块铁丝窗纱放在蜡烛的火焰上。你会惊讶地看到:火焰只在窗纱的网眼下摇晃,而不会透过网眼去。这是因为,纵横交叉的铁丝吸走了许多热,以致蜡烛的蒸     

Hydrodynamic coefficients of a simplified floating system of gravity cage in waves

Numerical simulation and experimental tests were carried out to examine the hydrodynamic behaviors of a double-column floating system of gravity cage under wave conditions. A floating system of gravity cage can be treated as a small-sized floating structure when compared with the wavelengths. The main problem in calculating the wave loads on the small-sized floating structure is to obtain the reasonable force coefficients, which may differ from a submerged structure. In this paper, the floating system of gravity cage is simplified to a 2D problem, where the floating system is set symmetrically under wave conditions. The motion equations were deduced under wave conditions and a specific method was proposed to resolve the problem of wave forces acting on a small-sized floating system of gravity cage at water surface. Results of the numerical method were compared with those from model tests and the hydrodynamic coefficients Cn and Cr were studied. It is found that Cn ranges from 0.6 to 1.0 while Cr is between 0.4 and 0.6 in this study. The results are useful for research on the hydrodynamic behavior of the deep-water gravity sea cages.     

两缸两排汽式600MW汽轮机低压装配研究

两缸式600MW汽轮机是新型机组,主要通过对机组低压缸装配的详细介绍来进一步了解和熟悉该机组结构独特性、先进性以及装配过程中的技术难点和问题的解决方法。     

有杆泵游动凡尔罩断脱机理及治理技术

抽油泵游动凡尔罩的受力是比较复杂的,其中因抽油杆在上下运动中会产生一个横向载荷,这载荷以波的形式向上传播,最终导致游动凡尔罩受应力过大而疲劳断裂,本文就此进行了分析,提出了安装扶正器、改进活塞、凡尔罩采用耐腐蚀材料的解决办法。     

用等效图求解电容器电容的两类典型问题

应用等效图示的方法、分析求解平行板电容器插入电介质和加上屏蔽罩后的电容。     

旋伞静电收尘器电晕极清灰系统研究

建立了旋伞静电收尘器电晕极的清灰系统的理论模型.分析了清灰系统中各构件参数对清灰振动加速度的影响.为提高旋伞静电收尘器电晕极清灰效果提供了理论依据.     

浅碟形动量轮密封罩屈曲的数值模拟

通过分析动量轮的结构、功能及实际工况,构建动量轮密封罩结构模型,其结构设计为1mm壁厚浅碟形密封罩。通过理论方法计算出浅碟形密封罩承受的临界强度,采用ANSYS软件分析了浅碟形动量轮密封罩壳顶有无飞轮轴支撑的特征值屈曲与非线性屈曲。结果表明:无飞轮轴支撑密封罩的非线性屈曲分析结果与理论值相近,且有飞轮轴时该临界值比无飞轮轴时大,验证了设计的1mm厚浅碟形动量轮密封罩能满足设计要求,可为同类产品的设计提供了参考。