共查询到20条相似文献,搜索用时 245 毫秒
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针对机车上装用的轮缘喷油装置不能识别复杂线路状况,在直线和曲线运行时均喷油,造成一定浪费且减磨效果不好,改进的最新产品仍存在距离偏差造成喷油时机不准等问题,从解决问题的角度出发,研究机车轮缘喷油装置控制技术改进方案,采用计算机控制及传感技术,使其具备自动识别曲线及状态、优化控制喷油时机和数量等功能,提高机车轮对减磨效果。 相似文献
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介绍了ZLPM-I型自动轮喷控制装置的工作原理及其特点.该装置对减少机车轮缘、踏面磨耗,减少机车旋修次数,缩短机车检修库停时间有一定的效果. 相似文献
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介绍了ZLPM-Ⅰ型自动轮喷控制装置的工作原理及其特点。该装置对减少机车轮缘、踏面磨耗,减少机车旋修次数,缩短机车检修库停时间有一定的效果。 相似文献
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径向转向架对减少机车轮对磨耗的作用 总被引:1,自引:0,他引:1
径向转向架技术在我国铁路机车上运用目前尚处于试验阶段,本文结合大连机车车辆厂研制的DF4D型7001号机车(采用径向转向架)在丰台机务段的运用情况,以实测数据,就应用径向转向架技术后在减少机车动轮轮缘磨耗、提高动力学性能等方面,与传统转向架做了对比论述。 相似文献
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针对造成我国现行C0-C0轴式机车个别轴位轮缘磨耗提前到限、各位轮对轮缘磨耗不均匀的原因进行了理论分析,并提出了改进措施。 相似文献
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对以轮对踏面滚动圆作为轮缘测量基准和以轮缘顶点作为轮缘测量基准两种情形下运用机车的轮缘厚度进行了分析比较,指出以轮对踏面滚动圆作为轮缘测量基准是更加科学、经济、合理的测量方法,有利于延长米轨机车轮缘的旋轮周期和降低运营成本。还对米轨东方红21型机车轮缘测量基准提出了修改建议。 相似文献
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东风5型内燃机车已被广泛应用于大型机械化驼峰编组站,但作业时存在着轮箍踏面非正常磨耗严重的问题.经分析后,对其轮箍踏面形状进行了改进处理,将原有的锥型踏面改用为DJND型,改型后的轮箍踏面非正常磨耗量减少了36%,取得了良好的效果. 相似文献
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介绍以DF4C型机车为基型,进行干式冷却水系统及其主要部件的研究设计、性能试验的情况,其结果对于干式冷却水系统在国产内燃机车上的装车运用,提高内燃机车冷却技术,具有一定的意义。 相似文献
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从机车各零部件的加工、组装质量等方面对厂内试运新造机车轮缘非正常磨耗的原因进行了分析,并介绍了相应的解决措施及其实施后的效果。 相似文献
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Nao-Aki Noda Akifumi Inoue Masato Nagawa Fumitaka Shiraishi 《International Journal of Pressure Vessels and Piping》2002,79(12):807-818
This paper deals with a new seal system between flange joints without using a gasket. This gasketless flange includes a groove and an annular lip that is machined in one of the flange rings which when removed being in contact with the other flange to form a seal line when the flanges are assembled. In this study, firstly, fundamental dimensions are examined for unplasticized polyvinyl chloride (PVC-U JIS) to obtain the best sealing performance. Then, the effects of material difference and flange nominal size upon the sealing performance of the new gasketless flange are investigated for two types of materials, 0.25% carbon steel (S25C JIS) and PVC-U. It is found that the critical internal pressure at which leakage appears is mainly controlled by the maximum stress at the annular lip for each material even if the flange nominal sizes are different. The gasketless flange made by PVC-U shows the higher critical internal pressure compared with the case of S25C if the same clamping forces are applied. The effect of stress relaxation for PVC-U on the sealing performance is also considered. Then, it may be concluded that this PVC-U gasketless flange as well as S25C has good sealing performance. 相似文献
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M. Murali Krishna M.S. ShunmugamN. Siva Prasad 《International Journal of Pressure Vessels and Piping》2007
Gaskets play an important role in the sealing performance of bolted flange joints, and their behaviour is complex due to nonlinear material properties combined with permanent deformation. The variation of contact stresses due to the rotation of the flange and the material properties of the gasket play important roles in achieving a leak proof joint. In this paper, a three-dimensional finite element analysis (FEA) of bolted flange joints has been carried out by taking experimentally obtained loading and unloading characteristics of the gaskets. Analysis shows that the distribution of contact stress has a more dominant effect on sealing performance than the limit on flange rotation specified by ASME. 相似文献
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指出DF4型机车齿轮箱窜、漏油脂的主要原因是牵引齿轮箱的密封结构存在着固有缺陷,其次是组装、检修和外购件质量方面的原因。介绍了所采取的相应解决措施。 相似文献