转子运转过程中的自动平衡研究

在分析国内外平衡所存在的优缺点的基础上,设计了一种新的平衡头和自动平衡控制系统。它具有结构简单,在运行中进行自动平衡,平衡速度快、平衡精度高等优点。适用于运行中,不平衡情况经常发生变化的旋转机械中。     

一次划线法找风机转子动平衡

介绍了笔者从生产实际出发,经过多年的反复探索,参考相关技术资料,总结出的一次划线找风机转子动平衡的简易方法。     

风机转子现场质量平衡方法的实验研究

在实验研究的基础上,提出了试重－求当前失衡量法、平衡－试重综合法。实验分析表明,这两种新方法对于风机转子的现场平衡具有明显的优点。     

催化装置主风机组不平衡故障的分析

通过对主风机组开机过程振动信号的分析,判明机组的振动原因为不平衡,并查明产生不平衡的原因。通过现场动平衡解决了机组的振动问题。     

转子自动平衡用释液式平衡头的研究

介绍了研制成功的释液式平衡头的工作机理、结构设计以及利用它进行的转子自动平衡试验的情况，还进行了有关激振的讨论。试验证明，释液式平衡头取得了很好的平衡效果且能连续工作。     

滚珠自动控制转子不平衡响应的动力学机理

通过理论分析和数值计算,研究在Jeffcott转子的圆盘里加入单、双滚珠的转子系统的周期解及其稳定性。研究表明,转子在临界转速以下运行时,单、双滚珠均使转子的静不平衡振动加剧,平衡恶化;而在临界转速以上运行时,特定参数的单滚珠能使转子自动达到静平衡,而参数设计合理的双滚珠始终能使转子达到自动静平衡,能有效地消除不平衡振动。另外,由于滚珠运动的影响,在转速刚过临界转速附近,系统发生自激振动。     

风机的平衡误差分析

介绍了引起风机不平衡的几种原因,并通过实例计算风机平衡误差得出了现场平衡的方法,提出了建议和解决措施.     

转炉风机的故障诊断

结合现场实际,运用大量的统计数据,分析转炉风机的故障现象,列举了一些经故障诊断实践证明的成功措施和手段。     

The role of information technology in rotor balancing

The potential of multimedia interactive simulators is discussed. As an example, the simulator for a system measuring vibration parameters is considered. By means of this simulator, the components and operating principle of the measuring system may be studied in dialog mode, as is demonstrated. The application of this system not only as a measuring instrument but also for the reduction of vibration in rotating mechanisms (rotor balancing) is demonstrated.     

Generalized modal balancing for non-isotropic rotor systems

This paper primarily aims at the new generalized modal balancing for non-isotropic rotor systems. The method is based on the derived unbalance modal responses from the complete modal analysis for non-isotropic rotor systems. We found, from investigating the modal configuration to be balanced, that the isotropic and asymmetric rotor systems appear a single 1X harmonic, whereas the anisotropic and general rotor systems appear duel and multiple harmonics, respectively. Furthermore, for the asymmetric and general rotor systems, each harmonic is combined with the multiple modal parameters. The peculiar feature for balancing the non-isotropic rotor systems is that the additional right eigenvector and counter excitation in stator to cancel the anisotropy are required to suppress effectively the total residual response. In this process, the concept of the dominant balancing mode is drawn from the definition of the major harmonic. Also it is suggested that the balancing performance is dependent upon the degree of accuracy of the unbalance modal response that is approximated by the dominant mode at a critical speed.The numerical simulations of the simple general rotor model with one balancing plane are performed to demonstrate the theoretical findings and effectiveness of the proposed method for non-isotropic rotor systems.     

罗茨鼓风机转子系统动态特性分析

应用ANSYS有限元分析罗茨鼓风机转子系统的动态特性.采用Solidworks建立SSR125H型三转子罗茨鼓风机转子实体模型,导入ANSYS软件进行三维有限元模态分析.研究了支承方式和轴承刚度对转子系统固有频率影响规律,为罗茨鼓风机结构优化与减振降噪设计奠定理论基础.     

Discrete optimization of rigid rotor balancing

This work deals with the discrete optimization problem of rotor two-plane balancing. The best balancing configuration is searched for two discrete parameters: allowed standard masses and predefined angular positions on the balancing planes. The objective is to minimize the residual unbalancing effects (such as reactions in supports) thanks to an optimal location of several accurately selected masses on each balancing plane. The corresponding optimization problem is solved using genetic algorithm. A simple model of a rigid rotor mounted on rigid supports is investigated in numerical examples. The optimization efficiency and the influence of the number of applied balancing masses are discussed. The experimental tests have validated the developed balancing approach.     

转子数控加工自动编程及仿真系统开发

介绍基于Pro/E、VERICUT软件平台,进行转子数控自动编程及仿真系统开发的过程、难点及解决办法.     

面向数控自动编程的模型识别技术研究

传统模型特征识别一般只能识别标准的孔、槽特征,当特征组合复杂、特征面缺失时则无法识别并给出候选工艺,为了有效支撑数控自动编程模式,提出一种架构线、面和边界基础几何特征框架的方法,以特征面凹凸和边界关系为基础设计模型分解规则.从STL文件中获取三角形面片数据,提出改进面积分布算子进行特征识别,同时给出了模型特征识别自动编程应用流程,以实现数控自动编程加工的新思路和新办法,最大程度上实现数控编程自动化,提高编程效率及软件对复杂加工对象的适应性.     

关于转子系统动平衡试重选择的试验研究

转子系统因制造、装配等原因均会产生不平衡现象,需要进行动平衡操作.现有的动平衡方法多是基于影响系数法,其在动平衡计算中需要先添加试重以计算影响系数矩阵,而加装试重的大小与相位会直接对动平衡精度产生影响.通过试验对比研究发现,相比于试重大小其加装相位将对动平衡结果产生决定性的影响.因此,应保持试重相位与初始不平衡相位接近...     

基于视觉的微马达转子引线自动化装配研究

将转子线圈的线头焊接到焊盘上是微马达制造的重要工序,由于操作对象的特殊性,线头焊接全部采用人工在显微镜下操作完成,人工焊接成本高、效率低、产品一致性差.针对这些问题,提出了一种基于视觉的微马达转子导线自动焊接方法,利用视觉自适应调整微马达的位姿.另外,采用气流定位法对转子导线进行定位,并分析了因位置和姿态调整产生耦合而...     

基于图像处理技术的旋翼锥体测量方法研究

针对我国直升机旋翼锥体测量过程中存在测量难度大、测量精度低、长期依赖国外测量仪器3个问题,研究了一种基于图像处理技术的直升机旋翼锥体可视化、非接触测量方法.首先在直升机桨叶尖部位置粘贴反光靶标,采用磁转速传感器得到直升机旋翼转速,根据桨叶数量对转速信号进行倍频;然后采用工业摄像机及LED频闪灯获取旋翼旋转过程中粘贴在每片桨叶尖部位置的反光靶标灰度图像;最后采用大津阈值分割法、Sobel算子、基于图像特征的图元自动识别算法相结合的图像处理算法实现直升机旋翼锥体共锥度测量.并采用自制的直升机动平衡实验台进行了地面模拟实验.实验结果表明,该系统测量误差小于0.5 mm,为在直升机上进行开车实验提供理论依据及技术基础.     

Flexible rotor balancing: A review of principles and practices

The balancing of flexible rotors on bearing supports is considered from fundamental and practica; standpoints. The effect of unbalance, the relevant parts of modal analysis and modal balancing, influence coefficients and influence coefficient balancing methods, the selection of balancing planes, measurements and procedures, results obtainable, outstanding difficulties, and likely developments are considered