菜单
  

    separate constraints).

    In the interest of conciseness we shall not dwell on the details of their calculation (the interested reader may find all the details of the gearing calculations in the relevant industrial standard document (DIN 1987) and the catalogs and calculation methods used for bearings and seals in the SKF online catalog (http://tinyurl.com/p7u4yx, Accessed on 17 August 2009)); we do note though that they are mostly based on a combination of lookup tables and simple analytical models, their computational cost therefore being minimal.

    Additionally, it is worth noting that to enable the calculation of some of the constraints (such as some of the geometrical inequalities, as well as those related to lubrication and operating temperature), the housing was also designed automatically once the virtual design of each two-stage gearing was generated.

    The following list of constraints should be viewed with

    reference to the sketch in Fig. 1.

    Constraint group 1 The relative dif ference between the

    required and the actual gearing ratio must be within the

    range [−2.5%, 2.5%] on both stages.

    Constraint group 2 The Hertzian contact pressure on the

    teeth of both stages must not exceed a specif ied value.

    Constraint group 3 The bending stress on the teeth of

    gears 1 through 4 must not exceed a specif ied value.

    Constraint group 4 The teeth on gears 1 through 4 must

    not be undercut.

    Constraint group 5 The top land of the teeth on gears 1

    through 4 must not vanish.

    Constraint group 6 The contact ratio on stages I and II

    must be greater than a specif ied value.

    Constraint group 7 The normal addendum coef f icients on

    both stages should be in the range [−0.5, 1].

    Constraint group 8 Measurability constraint for all four

    gears.

    Constraint group 9 The numbers of teeth on the gears of

    both stages must be relative primes.

    Automated optimal design of a two-stage helical gear reducer 433

    Constraint group 10 Gear 2 must not interfere with the

    output shaft.

    Constraint group 11 Lubrication constraint—the margin

    between the minimum and maximum allowable lubricant

    levels should be no less than 10 mm.

    Constraint group 12 The input and output shaft ends must

    have a suf f icient diameter step to allow the mounting of a

    belt wheel.

    Constraint group 13 The inside diameter of the tapered

    roller bearings on the input and output shafts must be less

    than the mounting diameter of the seal.

    Constraint group 14 Geometrical constraint relating to

    the space required by the outside ring of the tapered roller

    bearings on the input and output shafts.

    Constraint group 15 Set of manufacturability constraints

    on all four gears.

    Constraint group 16 Input, output and intermediary shaft

    stress constraints (radial and axial loads originating from

    the gearings).

    Constraint group 17 The fatigue life safety factors on the

    three shafts must not fall below a specif ied value.

    Constraint group 18 The bending strains on the three

    shafts in key locations must be below certain threshold values

    to enable the correct functioning of the gearings and the

    bearings.

    Constraint group 19 The torsional strains in the three

    shafts must be below a threshold value.

    Constraint group 20 The service life of the tapered roller

    bearings must exceed a specif ied value.

    Constraint group 21 The shearing and crushing stresses

    must not exceed a specif ied value on the keys and keyways

    of the input and output shafts.

    Constraint group 22 The minimum distance between adjacent

  1. 上一篇:噪音工程齿轮模型英文文献和中文翻译
  2. 下一篇:使用基因算法来减少齿轮振动英文文献和中文翻译
  1. 齿轮平行转子系统英文文献和中文翻译

  2. 齿条刀具对渐开线直齿轮...

  3. 液化天然气运输船螺旋桨...

  4. 薄壁行星齿轮的变形体动...

  5. 单级直齿圆柱齿轮减速器英文文献和中文翻译

  6. 超高速行星齿轮组合中内...

  7. 双曲柄环板式针摆线齿轮...

  8. 中国传统元素在游戏角色...

  9. C++最短路径算法研究和程序设计

  10. 高警觉工作人群的元情绪...

  11. 上市公司股权结构对经营绩效的影响研究

  12. 浅析中国古代宗法制度

  13. 现代简约美式风格在室内家装中的运用

  14. 巴金《激流三部曲》高觉新的悲剧命运

  15. NFC协议物理层的软件实现+文献综述

  16. 江苏省某高中学生体质现状的调查研究

  17. g-C3N4光催化剂的制备和光催化性能研究

  

About

优尔论文网手机版...

主页:http://www.youerw.com

关闭返回