平衡轴轴承早期损坏有原因

S195等柴油机上平衡轴轴承工作中经常被损坏,特别是飞轮侧上平衡轴轴承更易损坏。损坏特征为轴承保持架碎裂,滚珠挤在一边,外圈与内圈脱位甚至产生裂纹。当该轴承损坏后,柴油机工作不平稳,齿轮室内传出“哗——”的响声,加大油门时响声增大,怠速运转时响声较清晰。

一起风机事故原因分析

AYX75-1No22D型引风机叶轮的动平衡在拆迁过程中被破坏。在叶轮上加装一块配重后重新启动引风机锅炉并汽运行10h,出现该机侧轴承着火的事故。本文简述了该事故所造成的破坏情况,分析了事故原因,提出了预防措施。

CRH380A(L)型动车组齿轮箱检修技术分析

文章对CRH380A(L)型动车组齿轮箱结构以及五级修过程中齿轮箱的分解、组装进行介绍,提出国内现有组装方式存在容易磕碰G侧轴承的问题,提出改进吊运工装、引导工装,降低轴承磕碰故障的发生,保证齿轮箱的组装质量,从而保证动车组的运行安全。

不锈钢中厚板酸洗退火炉炉辊更换方案优化及检修技术探讨

本文结合不锈钢中厚板酸洗退火炉炉辊的设备组成情况和生产现状,通过对炉辊传动侧的技术改造、换辊装置的改进等方法措施优化其更换方案,解决了炉辊更换中遇到的一系列问题,为设备的顺畅运行提供有力保障。

引风机轴颈磨损修复技术

介绍了引风机轴颈损坏后的现场修复技术,该技术采用现场车削、同心度调整和喷焊技术,及时对引风机轴颈修复,节约了资金和时间,保证了机组正常恢复启动。

高效微型电动铡草机

山东省莱州市仲院镇铡草机厂研制生产的9Z-0.4型电动微型铡草机,最近通过省级鉴定,批量投放市场。该机为全钢立式转子滚筒结构。

Novel high torque bearingless two-sided rotary ultrasonic motor

Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which required lubricant. To solve the above problem, a bearingless travelling-wave USM is designed. First, a novel structure of the two-sided USM consisting of a two-sided teeth stator and two disk-type rotors is designed. And the excitation principle of the two-sided travelling-wave USM is analyzed. Then, using ANSYS software, we set up the model of the stator to predict the excitation frequency and modal response of the stator. The shape of the vibration mode was obtained. Last, the load characteristics of the USM are measured using ex-perimental method. The maximum stall torque and the no-load speed were obtained. The results showed that the characteristics of the two-sided USM are better than those of the conventional one-sided USM.

增压器采用飞机轴承

ABB公司生产的VTR..4系列增压器全部采用外置式自动润滑滚珠轴承和滚柱轴承。由于这两种轴承可以减少摩擦,因此机械效率大大提高。