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详细介绍了结晶器调宽控制系统的基本原理,并从实用的角度分析了该系统实现结晶器在线调宽所采取的主要控制原理,同时对结晶器调宽的控制算法进行了分析。 相似文献
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阐述了单流板坯连铸机结晶器液压调宽系统的设计、软硬件配置及控制方法。通过控制系统设计与调试,实现了结晶器液压调宽系统冷调宽的目标。 相似文献
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马钢CSP薄板坯连铸连轧生产线上的连铸机使用漏斗型板式结晶器,其宽度和锥度可在连续浇注中不降低拉坯速度的前提下在线连续调节。重点介绍结晶器在线调宽的原理、方法以及液压控制故障的分析与排除。 相似文献
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以无干扰复式结晶器板簧振动装置为研究对象,根据对连铸结晶器振动装置结构的研究,使用静力学中的常用方法将结晶器振动装置分为两部分,分别作独立的受力分析,同时采用虚位移原理与达朗贝尔原理分析振动结构,计算了液压缸端的负载。从实际生产需要出发,采用ADAMS虚拟样机软件对结晶器振动装置—无干扰式全板簧结晶器振动装置的动力学状态进行分析,得到液压伺服系统结晶器振动端与伺服油缸激振端之间的振动参数关系,为液压系统的设计提供理论基础。 相似文献
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结晶器是连铸设备中一个非常关键的部件,通常由支撑框架、宽边部件、窄边部件、调宽装置、夹紧装置、足辊等主要部件组成。 相似文献
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介绍Mapal座圈刀具精镗某发动机进排气座圈的工艺过程;通过使用Mapal座圈导管刀具对发动机缸盖座圈凡尔线角度和宽度经常超差问题进行研究;根据密封带宽度角度其变化规律更改刀具调整的公差,进而提高刀具寿命。 相似文献
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重点介绍了内燃机在使用和维护过程中气门间隙的调整方法,通过对常用的气门间隙调整方法——"逐缸调整法"和"双排不进"法进行比较分析,并根据长期的实践实验证明,此方法是一种更为快速、简便、准确的调整方法。 相似文献
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In this study, the suppression of flow-induced vibration of an elastically supported circular cylinder by attachment of a flexible sheet was investigated experimentally. In particular, the dependence of flow-induced vibration characteristics of the circular cylinder upon the flow velocity was investigated in detail by axially attaching the flexible poly-ethylene sheet to the cylinder surface. The characteristics of the flow-induced vibration of the cylinder were investigated by changing the attachment angle ?? and the length l of the flexible sheet (rectangular type) as experimental parameters in various combinations. The angle ?? was set at five different angles, 90°, 45°, 0°, ?45° and ?90°. The angle??s base point was the back side stagnation point of the cylinder. The length l of the flexible sheet varied from 0.5 to 3.0 times of the cylinder??s diameter at the interval of 0.5 times. The width T of the flexible sheet along the span of the cylinder also varied in 7 cases from 1.0L to 0.4L (L is the length of the cylinder) in order to discover the minimum width of the sheet necessary to effectively suppress the flow-induced vibration of the cylinder. Furthermore, the flexible sheet of the minimum width was split into 2 to 5 pieces and attached to the cylinder, and changes in the flow-induced vibration characteristics were investigated. Also, vibration characteristics were investigated for a flexible sheet in the shape of an isosceles triangle. As a result, the optimal length l and minimum width T of the flexible rectangular sheet were found to be 2??2.5D and 0.7L, respectively, to suppress the flow-induced vibration of the cylinder. Most importantly, it was found that the sheet located at the back side stagnation point can suppress the flow-induced vibration generated by any directional flow to strike the front surface of the cylinder. 相似文献
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以广东粤电云河发电有限公司两台300 MW机组为研究对象,针对其存在的高压缸排汽参数较设计值偏高的情况进行研究分析。经检查确认后发现原因为高压缸进汽导管密封环安装反向,调整后高压缸效率有了显著提高,高压缸排汽参数也得到明显下降。 相似文献
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《Wear》1986,113(3):353-370
The contact mechanism between a cylinder and a rough plate is theoretically analysed for mixed, elastic and plastic contacts of asperities. The analysis leads to the result that the contact pressure, the contact width and the compliance between the cylinder and plate differ considerably from those calculated from the Hertz equation and the Lundberg equation when the surface roughness in contact is greater and the normal load is lower. It is also found that the difference between the calculated contact width and the compliance based on mixed asperity contacts and those based on elastic or plastic asperity contacts is small. To confirm the analysed results, the contact width between the cylinder and the rough steel or rough copper plate was measured by means of evaporated carbon and lamp black film coatings on the rough surfaces. The compliance between the surfaces was also measured using differential transformers. Little difference was found between the analysed results and the experimental results. 相似文献
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采用有限元方法模拟计算了按等边三角形排布开孔的转鼓应力,讨论了开孔直径、鼓壁厚度、孔桥宽度以及转鼓半径等因素对鼓壁环向应力的影响情况.通过进一步计算研究得到了最大薄膜应力出现时孔桥宽度与开孔直径的关系曲线,为工程实际中转鼓开孔问题提供了计算依据. 相似文献