基于一种两层、多孔式磁性新型V带的研究

发布时间：2018-04-17 07:50

本文选题：V带中性层 + 三层实心V带　；参考：《青岛科技大学》2016年硕士论文

【摘要】：目前在工程中广泛使用着的普通V带大多是三层、实心式V带结构,这种V带在结构上存在着诸多的不足与缺陷,如V带的断面为三层组合式结构,它的上下层是胶体、中间是抗拉体,V带在位于带轮处进行弯曲运动时,V带组合结构中抗拉体与胶体的接触层处容易产生滑移错位;V带的弯曲柔性相对差、弯曲应力大;V带的无效质量相对多、离心应力大;V带与带轮间相对摩擦力小、V带的传动能力低。另外在很多权威教科书、获奖教材中对V带传动进行设计计算时参数确定的设计步骤也存在着不足,V带传动设计结果与工程实际应用有较大差异;设计的V带传动大都没能实现理论所期望的严格数值下的过载打滑,没有真正起到V带传动“安全保护器”的作用。针对普通V带结构和教科书中V带参数设计步骤的不妥,本研究提出了一种两层、空心、磁性包布式的新型V带结构,并给出了V带传动最佳设计参数确定的设计步骤。本研究的主要内容有以下两大部分:V带结构改进性研究:将V带的三层实体结构,改为两层空心式结构,降低了V带制造成本,改善了V带加工制造的工艺性;V带中性层最优设计,将中性层确定在抗拉体与胶体的分界线上,有效地发挥了V带抗拉体的承载能力,减少V带抗拉体与胶体滑移脱落的危险;将V带的内层胶体处适度间隔设计为数排圆柱孔,减轻了无效胶体的重量,增加了V带的弯曲柔性,有效地减少V带传动的离心拉应力;V带包布采用磁性橡胶材料,除了固定抗拉体与胶体外,能增加V带与带轮的吸附力,增加V带的承载能力。在V带结构改进、理论分析的同时,采用了ANSYS软件进行建模,进行了应力模拟测试,给出了测试结果,从而在理论上对V带的新理论、新设计提供了支持依据。V带传动的最佳设计方法与设计步骤:本研究改变了原来V带设计中,率先查图盲目确定V带型号,然后再确定其它参数的设计步骤。而是依据工作机应用特点,先确定大离散性的参数,如带的根数,然后再协调确定带的型号、带轮直径和带长,并可以按不同的带的根数,得到诸多个方案提供优选,从而为V带传动设计的最优化提供了很好的保障。本设计理念及设计步骤能保证设计结果恰好近似达到理想的设计临界状态,真正实现V带传动起到“过载保护器”的作用。通过对V带结构、性能的分析与研究,本文设计出一种两层、多孔式磁性新型V带,并且改进了V带的计方法和步骤,提出了最佳设计的方法步骤。从而解决了传统的三层、实心式普通V带的缺陷与不足,解决了教科书中V带传动设计步骤存在的不妥。
[Abstract]:At present, most of the common V-belt used widely in engineering is three-layer, solid V-band structure. There are many shortcomings and defects in the structure of this V-band. For example, the section of V-belt is a three-layer composite structure, and its upper and lower layers are colloids.In the middle, when the tensile V band is bending at the wheel of the belt, the contact layer between the tensile body and the colloid is easy to produce the relative poor bending flexibility of the slip dislocation V band, and the failure mass of the V band with large bending stress is relatively high.The driving capacity of the V belt with high centrifugal stress is lower than that of the belt wheel with low relative friction force.In addition, in many authoritative textbooks, the design steps of determining the parameters of V-belt transmission design in the award-winning textbooks are also different from the actual engineering application.Most of the V-belt drives can not realize the overload slip under the strict value expected by the theory, and do not really play the role of "safety protector" of V-belt transmission.In this paper, a new type of V-belt structure with two layers, hollow and magnetic wrapping is proposed, and the design steps for determining the optimum design parameters of V-belt transmission are given.The main contents of this study are as follows: the three-layer solid structure of V-band is changed into two-layer hollow structure, which reduces the manufacturing cost of V-belt.The optimum design of V-belt neutral layer is improved, the neutral layer is determined on the dividing line between the tensile body and the colloid, the bearing capacity of the V-band tensile body is effectively brought into play, and the danger of V band tensile body and colloidal slippage is reduced.In order to reduce the weight of the ineffective colloid and increase the bending flexibility of the V-belt, the appropriate interval between the colloid in the inner layer of V-belt is designed as several rows of cylindrical holes. The magnetic rubber material is used to effectively reduce the centrifugal tensile stress of V-belt transmission.In addition to the fixed tensile body and colloid, the adsorption force of V-band and belt wheel can be increased, and the load-carrying capacity of V-band can be increased.At the same time of the improvement of V-band structure and the theoretical analysis, the ANSYS software is used to model the model, the stress simulation test is carried out, the test results are given, and the new theory of V-band is theoretically analyzed.The new design provides the best design method and design steps for supporting .V belt drive: this study changes the original V belt design, first looking up the diagram blindly to determine the V belt model, and then determining the design steps of other parameters.On the basis of the characteristics of the work machine application, the parameters of large dispersion, such as the root number of the belt, and then the model of the belt, the diameter and length of the belt wheel can be determined in coordination, and many schemes can be obtained according to the root number of the different bands.Thus it provides a good guarantee for the optimization of V belt transmission design.The design idea and the design steps can ensure that the design result exactly reaches the ideal design critical state, and the V-belt drive plays the role of "overload protector".Based on the analysis and study of the structure and performance of V-band, a new type of V-band with two-layer, porous magnetic is designed, and the counting method and step of V-band are improved, and the method and step of optimum design are put forward.Thus, the defects and shortcomings of the traditional three-layer, solid ordinary V-belt are solved, and the improper design steps of V-belt transmission in textbooks are solved.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132.32

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