众文网1.千斤顶的毕业设计和论文
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第一章 设计题目及材料选择
1.1设计要求
简单千斤顶的螺杆和螺母的主要尺寸。起重量为40000N，起重高度为200mm，材料自选.。
传力螺旋传动要求以小的扭矩产生较大的轴向推力，一般为间歇性工作，每次的工作时间较短，工作速度也不高，通常有自锁能力，所以千斤顶设计采用此结构。
1.2 主要零件的常用材料
螺杆： 45# 采用带有外螺纹的杆件
螺母：铸锡青铜 带有内螺纹的构件
底座：灰铸铁 HT100 带1:15斜度
1.3 千斤顶结构示意图
第二章 螺杆的设计计算
2.1耐磨性计算
螺旋传动耐磨性与比压，滑动速度，表面粗糙度及润滑有关，螺纹工作面上能建立油膜就可减少磨损，而建立油膜取决于比压，所以要限制比压p>[p]。
2.【液压千斤顶的工作原理及运用】
1、动力部分-将原动机的机械能转换为油液的压力能（液压能）.例如：液压泵.\x0b2、执行部分-将液压泵输入的油液压力能转换为带动工作机构的机械能.例如：液压缸、液压马达.\x0b3、控制部分-用来控制和调节油液的压力、流量和流动方向.例如：压力控制阀、流量控制阀和方向控制阀.\x0b4、辅助部分-将前面三部分连接在一起，组成一个系统，起贮油、过滤、测量和密封等作用.例如：管路和接头、油箱、过滤器、蓄能器、密封件和控制仪表等.\x0b在一定体积的液体上的任意一点施加的压力，能够大小相等地向各个方向传递.这意味着当使用多个液压缸时，每个液压缸将按各自的速度拉或推，而这些速度取决于移动负载所需的压力.\x0b 在液压缸承载能力范围相同的情况下，承载最小载荷的液压缸会首先移动，承载最大载荷的液压缸最后移动.\x0b 为使液压缸同步运动，以达到载荷在任一点以同一速度被顶升，一定要在系统中使用控制阀或同步顶升系统元件.。
3.英语高手来啦,液压论文摘要翻译~
Hydraulic Pump Station is to drive the use of electric motors, fuel tanks, hydraulic relief valve, etc., including the source device or the hydraulic control valve device, including. General principles of its role in motor driven pump to provide the pressure source, through the chip, such as hydraulic valve drive device (the fuel tank or motor) to the direction, pressure, flow regulation and control of action to achieve the various provisions. Hydraulic station on various occasions is widely used in hydraulic power transmission, it can be highly integrated and fully automatic control, the space can be made in accordance with the specific corresponding shape points on the hydraulic design of great practical significance . In this paper, the subject "before the bridge hydraulic system design - on the 2nd valve station" based on the former bridge some of the hydraulic system components detailed design of structure. First of all, set the modalities for the implementation of hydraulic components and the structure and function parameters, and then for the function of this hydraulic station, institutional characteristics, the initial stop to determine the hydraulic system schematic diagram, and then the hydraulic system of the various components of the standards in detail Select pieces, and finally the entire system will optimize the combination of various components and the check.。
4.~英语高手来啦,液压论文摘要翻译~
Hydraulic Pump Station is to drive the use of electric motors, fuel tanks, hydraulic relief valve, etc., including the source device or the hydraulic control valve device, including. General principles of its role in motor driven pump to provide the pressure source, through the chip, such as hydraulic valve drive device (the fuel tank or motor) to the direction, pressure, flow regulation and control of action to achieve the various provisions. Hydraulic station on various occasions is widely used in hydraulic power transmission, it can be highly integrated and fully automatic control, the space can be made in accordance with the specific corresponding shape points on the hydraulic design of great practical significance . In this paper, the subject "before the bridge hydraulic system design - on the 2nd valve station" based on the former bridge some of the hydraulic system components detailed design of structure. First of all, set the modalities for the implementation of hydraulic components and the structure and function parameters, and then for the function of this hydraulic station, institutional characteristics, the initial stop to determine the hydraulic system schematic diagram, and then the hydraulic system of the various components of the standards in detail Select pieces, and finally the entire system will optimize the combination of various components and the check.。
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