共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
3.
滑块式万向接轴广泛用于各类机械传动中,以往其扁头的强度计算多采用密诺维奇的经验公式,它是假定滑块和开口扁头间的接触压力呈三角形分布。经验公式法有一定的实用价值,但有许多不足之处,有些问题尚待进一步探讨:(1)经验公式所算出的是扁头的最大计算应力值,但未确定出最大计算应力的所在部位;(2)不能得到扁头体应力变化规律;(3)所算出的最大 相似文献
4.
5.
滑块式万向接轴由于允许倾角较大,工作平稳,能传递的扭矩范围较广,维修方便,故广泛应用于轧辊调正范围较大的轧钢机上。为了延长滑块和叉头的使用寿命,降低各种消耗,除在叉头的材质、表面硬度采取强化措施,探索青铜滑块的代用材料外,润滑问题也是至关重要的。我们1985年开始,对φ1100初轧机滑块式万向接轴的润滑与密封存在的问题,采取不同的油脂和密封方法,进行多次试验,初步取得了一定的成果,介绍如下。 相似文献
6.
7.
8.
万向接轴是钢厂粗轧机重要零件,在传递动力和扭矩方面起到非常关键的作用,是轧钢过程的主要受力件.1270粗轧机滑块式万向接轴的结构特点是两端具有开式滑块式叉头.其制造难点为,尺寸较长、热处理容易变形,锻件内部质量要求高、超声波探伤严格,接轴尺寸公差和粗糙度要求都很高.主要采用电渣重熔冶炼,4000砘水压机锻造,在上下炉膛... 相似文献
9.
本文介绍了650型轧钢机滑块式万向接轴滑块的服径条件和失效机理,提出了它的改进措施,为提高滑块的使用寿命提供了一定的参数。 相似文献
10.
11.
万向联轴器十字轴和叉头结构十分复杂,受力状况用一般经典方法无法进行准确的计算,本文采用CAD造型技术和有限元方法,对万向联轴器十字轴和叉头进行了强度计算,运用三维光弹应力分析方法对计算结果进行实验验证,取得基本一致的结果。为了满足船用万向联轴器挠度大,长度变化频繁的特点,将普通移动花键改为滚动接触结构,大大减少了长度变化的时摩阻力,这是一种国内尚未见过的新颖结构,本文还对大功率万向联轴器进行了高速 相似文献
12.
13.
三叉杆滑块式万向联轴器的运动分析 总被引:2,自引:0,他引:2
利用方向余弦矩阵对三叉杆滑块式万向联轴器的关键部件——滑块进行运动分析,得出了滑块的速度和加速度表达式。为这种万向联轴器后续的动力分析提供了基础,也为一般的运动分析提供了参考。 相似文献
14.
The dynamics of the load/unload process are studied using a so-called ‘periscope approach’ which allows us to follow the slider motion during load/unload (L/UL) with the beam of a Laser Doppler Vibrometer (LDV). LDV signals and acoustic emission signals are obtained for three different slider airbearing designs and for load/unload conditions with different vertical velocities and spindle speeds. The load process is investigated statistically using the acoustic emission signal in order to determine the effect of vertical load speed and spindle speed on the probability of contacts between slider and disk.The results indicate that small vertical load speeds decrease the number of head/disk contacts, and that slider designs with a cavity centered close to the trailing edge enable a smooth unloading process. 相似文献
15.
16.
17.
18.
The tribological characteristics of the head–disk interface are investigated during load–unload for air and helium-filled drives as a function of the pitch static angle and the roll static angle between slider and disk. A custom-made experimental tester inside a sealed environmental chamber was used to determine the regions of “safe” pitch static angle and “safe” roll static angle in air and helium environment during the load–unload process. The presence of head–disk contacts during load–unload were evaluated by measuring the acoustic emission signal and the decrease in rotational speed of the spindle. Scanning electron microscopy and optical surface analysis were used to investigate wear of the slider and the redistribution of lubricant on the disk surface after 10,000 load–unload cycles. The results indicate that the tribological performance of the head–disk interface is improved in helium environment compared to air environment. 相似文献