双点接触等角螺旋线锥齿轮强度分析及试验研究

发布时间：2019-03-02 08:46

【摘要】：螺旋锥齿轮是一种以高效传递动力为主要目的的机械传动基础件,具有承载能力强、重叠系数大以及传动平稳性好等突出优点,其在航天、机床和汽车等工业领域里得到了广泛应用。在工程实际应用中,螺旋锥齿轮的典型传动形式为交错轴或相交轴,其运动为三维空间运动,与其他齿轮传动相比受力情况比较复杂。而啮合齿面作为承受载荷和传递动力的直接作用面,其是影响螺旋锥齿轮传动性能的关键因素。本文根据共轭曲线啮合基本原理,提出了一种新型双点接触等角螺旋线共轭曲线锥齿轮副,并开展了该新型齿轮副齿面接触强度理论和试验测试技术的研究。论文主要内容如下:(1)提出了一种新型双点接触等角螺旋线共轭曲线锥齿轮啮合副,推导了共轭曲线锥齿轮副的啮合方程;提出了双点接触等角螺旋线共轭曲线锥齿轮副齿面构建的一般方法,并推导了其齿面方程;建立了90°轴夹角双点接触等角螺旋线锥齿轮副的三维模型。(2)推导了点接触等角螺旋线锥齿轮副齿面的接触强度理论计算公式;采用有限元方法对双点接触等角螺旋线锥齿轮副进行了齿面接触强度分析,并研究了该啮合副的接触特性;提出了双点接触等角螺旋线锥齿轮副的修形设计方法,对修形后的啮合副进行了接触强度分析,并对比了修形前后齿面的接触应力分布情况。分析结果表明本文采用的修形方法能有效改善双点接触等角螺旋线锥齿轮副的边缘接触情况。(3)完成了双点接触等角螺旋线锥齿轮齿轮箱的样机试制;搭建了新型齿轮箱性能测试试验台,开展了双点接触等角螺旋线锥齿轮箱和SEW齿轮箱的传动效率和温升等基本性能的对比试验。性能试验结果表明双点接触等角螺旋线锥齿轮副具有良好的传动特性,具有广阔的应用前景。
[Abstract]:Spiral bevel gear is a kind of mechanical transmission foundation with the main purpose of high efficiency transmission power. It has the outstanding advantages of strong bearing capacity, large overlap coefficient and good stability of transmission. Machine tools and automotive industries have been widely used. In practical engineering application, the typical transmission form of spiral bevel gear is interlaced shaft or intersecting shaft, and its motion is three-dimensional space motion. Compared with other gear transmission, the force condition of spiral bevel gear is more complicated. The meshing tooth surface, as the direct acting surface to bear the load and transfer the power, is the key factor affecting the transmission performance of spiral bevel gear. According to the basic principle of conjugate curve meshing, this paper presents a new type of double point contact equal angle helix conjugate curve bevel gear pair, and studies on the contact strength theory and test technology of the new gear pair tooth surface. The main contents of this paper are as follows: (1) A new type of double-point contact equal angle helix conjugate curve bevel gear mesh pair is proposed and the meshing equation of conjugate curve bevel gear pair is derived. The general method of constructing the tooth surface of the conjugate curve bevel gear with double-point contact isogonal helix is presented and its tooth surface equation is derived. The three-dimensional model of double-point contact equal angle spiral bevel gear pair with 90 掳axis is established. (2) the theoretical calculation formula of contact strength of point contact equiangular spiral bevel gear pair is deduced. The tooth surface contact strength of double point contact equal angle spiral bevel gear pair is analyzed by using finite element method, and the contact characteristics of the meshing pair are studied. The shape modification design method of double point contact equal angle spiral bevel gear pair is put forward. The contact strength of the modified meshing pair is analyzed and the contact stress distribution of tooth surface before and after modification is compared. The analysis results show that the modification method used in this paper can effectively improve the edge contact of the double-point contact equiangular spiral bevel gear pair. (3) the prototype of the double-point contact equiangular spiral bevel gear box is tested and manufactured. A new type of gear box performance test-bed was built. The comparison tests of transmission efficiency and temperature rise between the double-point contact constant angle spiral bevel gear box and the SEW gear box were carried out. The performance test results show that the double-point contact equiangular spiral bevel gear pair has good transmission characteristics and has a wide application prospect.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132.41

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