罗茨鼓风机同步齿轮无键联接配合尺寸的有限元模拟

计算罗茨鼓风机同步齿轮无键联接的配合尺寸，利用有限元软件MSC．Marc对同步齿轮与轴锥配合的过盈量进行模拟，从而确定了合理的同步齿轮与轴锥配合的过盈量。     

齿轮与轴压装过程过盈配合研究

过盈配合由于连接承载能力强、结构简单等特点,被广泛应用于实际生产中。由于齿轮与轴之间装配过盈量直接影响着齿轮传动的工作性能,因而对齿轮与轴过盈配合研究具有重要的意义。从理论上详细地推导了齿轮和轴过盈配合过程,建立了过盈量计算公式,并采用有限元法对齿轮与轴之间的最大过盈量进行了数值计算,得到了应力分布和压装力变化,接触应力结果表明理论计算和有限元计算结果基本一致,可为齿轮与轴过盈设计提供一定的理论和依据,具有重要的实用价值。     

高速大功率柴油机曲轴齿轮有限元分析技术研究

根据高速大功率柴油机曲轴齿轮的结构和承载特点,对三维过盈装配有限元模型和齿轮对啮合有限元模型的建模方法进行详细分析和论述,在此基础上对曲轴齿轮过盈联接中的装配预应力和传递扭矩与齿轮内径和过盈量的关系,以及齿轮对动态啮合时的动静载荷和不同脉冲对结构强度的影响作相关理论分析,并用接触有限元方法进行对比分析计算,得到的结论可用于同类斜齿轮的设计和改进。     

减速器齿轮与轴过盈配合选取的分析

抽油机减速器齿轮与轴过盈配合的选取不当是造成减速器串轴和齿轮冲击的直接原因,精确确定过盈量是减速器设计的关键。以26B型减速器为例,根据额定扭矩计算所需的过盈量并和当前所选的过盈量进行比较,对其不合适的配合进行了修改,最后依据修改后的过盈配合计算出热装时工件的加热温度,从而减少用电量、节约成本。     

油压法拆装的过盈配合及其在压缩机中的应用

通过油压法拆装的过盈配合结构,介绍了油压法拆装的过盈配合的原理及设计使用要点。同时,介绍了此种结构在调整螺杆压缩机同步齿轮及罗茨鼓风机同步齿轮等设备中的应用。     

高铁车轴与齿轮过盈配合计算与分析

高铁齿轮箱具有降速增扭的作用,其齿轮与车轴间的过盈配合非常关键。运用DIN 7190标准和有限元方法对高铁车轴与齿轮过盈配合进行力学分析计算,得到了在极限配合尺寸下的各部件接触压强与应力分布规律。计算结果表明,该配合设计在足够的安全裕度下保证了动力传递且不发生滑移。该研究为高铁齿轮箱过盈配合的设计提供了一定的理论基础和技术支撑。     

带式输送机改向滚筒有限元分析

建立了轴和轮毂过盈配合的带式输送机改向滚筒的有限元模型，基于国际通用有限元分析软件ANS YS分析了过盈配合产生的预应力，以及在工作载荷作用下改向滚筒的应力及变形，讨论了滚筒的结构参数对滚筒应力和轴最大挠度的影响。     

变速器过盈配合接触非线性分析

近年来变速器装配涉及的齿轮、轴承压装工艺被广泛应用,对高速旋转齿轮及轴承的装配质量提出了更高要求。本文利用有限元分析软件ABAQUS对光轴过盈配合进行接触非线性分析,针对冷压和热压两种方法研究摩擦系数、过盈量对装配应力的影响。本文采用有限元分析方法对变速器过盈配合进行非线性分析,研究成果对改进装配工艺,提高产品质量具有参考意义。     

机械传动装置的过盈配合

过盈配合可用于齿轮和滑轮之类的组合传动零件。但当元件数目增加时,分析这些组合件应力的工作很复杂.如果用矩阵方程可使应力分析简化.用计算机求解矩阵方程很为方便.在机械传动装置中,通常把键,销和花键作为连接元件,将扭矩从传动轴传递给齿轮,滑轮、皮带轮及链轮。过盈配合也能用来传递扭矩。因为无须连接装置,省去了键槽,销孔及花键齿的加工,因而成本较低。过盈配合时,齿轮或链轮的装配孔径小于轴径,用压合方     

机械传动中的过盈配合

在机械传动中常用键、销和叠接等来传递由轴到齿轮、滑轮等上的力矩。过盈配合也能用来传递力矩。并且费用较低,因为它免去了连接设计和键槽、销孔,叠接齿机械加工。采用过盈配合时,齿轮、棘轮的装配孔直径要比轴径小一些,因此可采用压入或热胀的方法套装在轴上。为了防止滑动,驱动轴和齿轮或棘轮之间的过盈量必须随着传递力矩的增加而增加。当过盈量大时,则装配件产生的内应力也大。从而有可能导致驱动结构的损坏。所以必须按照限定的应力小心地设计部件的几何尺寸和过盈量。     

行星齿轮传动单侧板转臂的有限元分析

封闭式行星齿轮传动中单侧板转臂通常为整体式。分析研究了将行星轮轴与单侧板分开加工,采用过盈配合联接形成分离式单侧板转臂,以代替整体式结构的方法,来提高制造工艺性。并应用有限元分析软件ANSYS,将组装后的分离式单侧板转臂,在考虑其过盈配合及行星轮轴加载情况下进行结构分析,得出了分离式转臂分别在一组不同大小过盈量下,其变形、应力大小变化规律及其分布,从而获得了其过盈配合的最佳过盈量。转臂结构优化方法可行,实践应用效果良好。     

Effects of Prestressing of the Ring Gear in Interference Fit on Flexural Fatigue Strength of Tooth Root

When the gearbox body interference is connected to the ring gear, prestressing occurs in the ring gear, which has a significant impact on the strength and life of the gear. Research on the prestressing of the inner ring gear is in the preliminary stage, and the distribution rule of the prestressing and the influence of each parameter on the interference prestressing have not been derived. In this paper, based on the method of calculating the prestressing of the thick cylinder in interference fit, the ring gear is found to be equivalent to a thick cylinder, and the distribution rule of prestressing of the ring gear in the interference fit is inferred. Then, by modeling and analyzing the gearbox body and ring gear in the interference fit using ABAQUS, the distribution rule of prestressing the ring gear in the interference fit is obtained through a numerical simulation. Finally, the prestressing of the ring gear in the interference fit is measured using X-ray di raction, and the distribution rule of prestressing of the ring gear in the interference fit is obtained through analysis. Compared with the distribution rule of prestressing in theory, numerical simulation, and experiment, the theoretical distribution rule of prestressing is amended through a statistical method, and a more accurate formula of prestressing is obtained. Through the calculation of the stress and bending moment in the dangerous section of the ring gear through prestressing, the formula for checking the tooth root flexural fatigue strength in the interference fit prestressing is inferred. This research proposes a tooth root bending strength conditional formula for the inner ring gear of the interference fit, which serves as a guide for the design and production of the actual interference joint inner ring gear.     

磁力齿轮内转子护套过盈量计算及其应力分析

针对磁力齿轮中转子在旋转时产生的离心力容易导致表贴式永磁体损坏的问题,将一个高强度过盈配合的保护套应用到永磁体的保护中。对内转子保护套与永磁体间的过盈配合量及其应力的计算方法进行了分析,对一台内转子速度为56 r/min,传动比为8的磁力齿轮,计算了内转子护套和永磁体的应力值以及护套的过盈量,并根据计算出的过盈量利用ANSYS Workbench15.0分析了护套和永磁体的应力,通过建立试验平台对稳定运行一段时间的样机进行了拆分,观察护套效果。研究结果表明:仿真结果接近理论计算值,内转子护套表面光滑无凸起,证明数值计算的准确性,该护套可用于保护永磁体。     

A force/stiffness compensation method for precision multi-peg-hole assembly

In interference fit assembly, the magnitude and deviation of the assemble force are large so that it is hard to reach high accuracy of position for components of multiple parts stacked up. A force/stiffness compensation method is proposed to control the positioning accuracy in the interference fit assembly for multi-peg-hole components. Based on the force and displacement information measured in the assembly process, the position errors are acquired, and the stiffness of the assembly system under the exerted assemble force is calculated. According to the stiffness, the deviation from the target position is calculated and compensated. An experimental equipment based on this method was developed. As an example, assembly of rings, 6.2 mm in diameter and 0.25 mm in thickness, was carried out to demonstrate the feasibility of the proposed method. The assembly results show that high positioning accuracy of the assembled rings can be achieved with a large variation of assembly force. The presented method provides a simple, feasible, and efficient solution for interference fit assembly for multi-peg-hole components.     

齿轮组合圆柱面过盈配合联接设计分析

详细分析和论证齿轮组合圆柱面过盈联接的特点和可行性     

The meshing angular velocity and tangential contact force simulation for logarithmic spiral bevel gear based on Hertz elastic contact theory

To obtain the change tendency of output angular velocity and tangential contact force of a gear when the pinion under the step input during meshing of a new type of spiral bevel gear, which is a logarithmic spiral bevel gear, the tooth flank equation of logarithmic spiral bevel gear is deduced based on the formation mechanism of the tooth flank formation. A three-dimensional model of a pair of logarithmic spiral bevel gears whose number of teeth was 37:9, with modules being 4.5 mm, normal pressure angle being 20 degrees and spiral angle being 35 degrees were built and assembled. Based on Hertz elastic contact theory, the calculation formulas and parameters sets of contact force for conventional spiral bevel gear meshing simulation and logarithmic spiral bevel gear meshing simulation were done. Consider the dynamic simulation about meshing angular velocity and tangential contact force for conventional spiral bevel gear meshing and logarithmic spiral bevel gear meshing, respectively. Finally, by analyzing and comparing the simulation data, the results show that under the same input conditions, the fluctuation of the gear angular velocity and tangential contact force of logarithmic spiral bevel gear meshing are smaller than the conventional spiral bevel gear. That is, the transmission stationary of logarithmic spiral bevel gear meshing is superior to conventional spiral bevel gear.     

高速永磁电机转子护套过盈配合量计算及应力分析

高速永磁电机的永磁体抗拉强度很小,不能承受转子高速旋转产生的离心力,因此需要一个过盈配合的高强度防护套对永磁体进行保护。主要分析了转子护套和永磁体间过盈配合量及应力的计算方法,对一台额定转速60 000 r/mim的高速永磁电机,计算了过盈量的值以及护套和永磁体的应力,并根据计算的过盈量采用ANSYS Workbench12.1分析了护套和永磁体的应力。结果表明,理论计算值与ANSYS的仿真结果接近,能够满足高速下保护永磁体的要求。     

Design of antibacklash pin-gearing

The paper suggests that pin gearing can be used for an antibacklash gear. The gear tooth curve derived from a cycloidal curve furnishes the pin gearing with kinematic antibacklash, low pressure angle, and no interference among other features. Pins on one side of a centerline are contacting the forward faces of a mating tooth gear. Simultaneously, pins on the other side of the centerline are contacting the backward faces of the gear. The correct center distance can be maintained in this multiple-contact mechanism by applying a force directed to each other center. A generating method of tooth-gear manufacture is also suggested. Contact and bending deformations as well as the gear stress are analyzed to help its design.