齿轮箱通用跑合乎台研制

通过梳理分析本公司各类产品内的齿轮箱跑合要求,研发一种通用性较强的跑合平台,平台含控制器、通用安装支架、通用测试电机、各类电机与齿轮箱驱动轴的安装接口等,满足现有各产品及后续产品的齿轮箱跑合要求,提高生产效率,节约生产成本.     

齿轮箱通用跑合乎台研制

通过梳理分析本公司各类产品内的齿轮箱跑合要求,研发一种通用性较强的跑合平台,平台含控制器、通用安装支架、通用测试电机、各类电机与齿轮箱驱动轴的安装接口等,满足现有各产品及后续产品的齿轮箱跑合要求,提高生产效率,节约生产成本.     

齿轮电火花跑合工艺

我公司为解决减速机跑合问题,引进DZ42型四闸流管双回路齿轮电火花跑合电源,该电火花跑合电源主要用于齿轮减速器跑合工艺,代替金刚砂研齿、空载跑合、人工刮齿、砂轮修磨等老工艺方法,减轻了劳动强度,提高了工效。     

蜗杆副的跑合工艺

叙述了蜗杆副跑合的目的、作用以及跑合过程的特点和跑合中应重视的几个问题。     

一种新型格来密封圈的安装

在江苏 - 65 4 IB型拖拉机的提升系统中 ,为了提高其工作的可靠性与降低加工要求 ,在活塞与缸筒配合中 ,不再使用传统的 O型密封圈 ,而是选用了一种新型的格来密封圈。格来密封圈与 O型密封圈的不同点主要为 :1 .弹性差　外径为Φ1 1 0 mm的格来圈 ,其直径方向的变化量仅为 8mm。2 .刚性大　与普通 O型密封圈相比 ,安装时比较费力。3.回弹性小　涨大后需要用外力铆合。因此 ,安装格来密封圈要比安装普通 O型密封圈困难得多。试装时 ,根据上述特点 ,仅做了 1个锥面芯轴 ,如图 1所示 ,先把锥面芯轴放在活塞上 ,而后把格来密封圈装在锥面芯…     

大型齿轮减速器的跑合

概述大型齿轮减速器齿轮跑合的目的和作用 ,着重研究跑合的过程及机理 ,分析影响跑合的主要因素 ,提出跑合的控制方法。     

双圆弧齿轮跑合的计算机仿真

建立了双圆弧齿轮跑合仿真的数学模型。该模型可以描述不同工况的圆弧齿轮跑合过程，得到双圆弧齿轮的理想跑合规范。分析了理想啮合状态和有中心距误差情况下双圆弧齿轮的跑合磨损规律，得到了跑合前后双圆弧齿轮接触区形状以及跑合磨损量变化曲线，计算结余与试验结果非常吻合。     

圆弧齿轮跑合分析

从润滑、磨损和接触力学3方面对圆弧齿轮的跑合机理进行探讨,推导了跑合后油膜厚度计算公式,分析了不同齿面的跑合磨损量,确定了齿面法向磨损量的影响因素,最后指出圆弧齿轮的初始接触区对跑合有重要影响。     

等离子弧淬火后处理工艺对摩擦学特性的影响

等离子弧淬火后处理工艺主要采用研磨和化学跑合2种方法.研究2种后处理工艺对材料表面摩擦磨损的影响.结果表明:后处理方式采用研磨对表面摩擦磨损性能的改善不明显,而化学跑合使摩擦副的润滑状态得到改善,减摩性能明显提高.因此在等离子弧淬火后,对需要进行精加工的表面可直接采用化学跑合工艺,提高二次加工的效率和配合性能.     

跑合脂在钢—钢蜗杆传动中的应用

本文提出了一种新的跑合方法,利用新研制的跑合脂在极压条件下的腐蚀作用,通过化学抛光,降低表面粗糙度。这种跑合脂在钢一钢蜗杆减速机的实验中表明,跑合后的蜗轮蜗杆齿面精度可提高近三个等级。逼过对这种跑合脂作用机理的分析和跑合工艺方法的研究表明,本文提出的跑合方法对钢—钢接触高副传动具有重要意义。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...