ISO 6336-1-2006 直齿轮和斜齿轮承载能力的计算.第1部分:基本原则、引言和一般影响因素

标准号：ISO 6336-1-2006
中文标准名称：直齿轮和斜齿轮承载能力的计算.第1部分:基本原则、引言和一般影响因素
英文标准名称：Calculation of load capacity of spur and helical gears - Part 1: Basic principles, introduction and general influence factors
标准类型：J17
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：J17
国际标准分类号：21.200
适用范围：This part of ISO 6336 presents the basic principles of, an introduction to, and the general influence factors for,the calculation of the load capacity of spur and helical gears. Together with ISO 6336-2, ISO 6336-3,ISO 6336-5 and ISO 6336-6, it provides a method by which different gear designs can be compared. It is notintended to assure the performance of assembled drive gear systems. It is not intended for use by the generalengineering public. Instead, it is intended for use by the experienced gear designer who is capable ofselecting reasonable values for the factors in these formulae based on knowledge of similar designs andawareness of the effects of the items discussed.The formulae in ISO 6336 are intended to establish a uniformly acceptable method for calculating the pittingresistance and bending strength capacity of cylindrical gears with straight or helical involute teeth.ISO 6336 includes procedures based on testing and theoretical studies such as those of Hirt [1], Strasser [2]and Brossmann [3]. The results of rating calculations made by following this method are in good agreementwith previously accepted gear calculations methods (see References [4] to [8]) for normal working pressureangles up to 25° and reference helix angles up to 25°).For larger pressure angles and larger helix angles, the trends of products YF YS Y β and, respectively, ZH Z ε Z βare not the same as those of some earlier methods. The user of ISO 6336 is cautioned that when the methodsin ISO 6336 are used for other helix angles and pressure angles, the calculated results will need to beconfirmed by experience.The formulae in ISO 6336 are not applicable when any of the following conditions exist:⎯ spur or helical gears with transverse contact ratios less than 1,0;⎯ spur or helical gears with transverse contact ratios greater than 2,5;⎯ interference between tooth tips and root fillets;⎯ teeth are pointed;⎯ backlash is zero.The rating formulae in ISO 6336 are not applicable to other types of gear tooth deterioration such as plasticyielding, scuffing, case crushing, welding and wear, and are not applicable under vibratory conditions wherethere may be an unpredictable profile breakdown. The bending strength formulae are applicable to fractures atthe tooth fillet, but are not applicable to fractures on the tooth working surfaces, failure of the gear rim, orfailures of the gear blank through web and hub. ISO 6336 does not apply to teeth finished by forging orsintering. It is not applicable to gears which have a poor contact pattern.The procedures in ISO 6336 provide rating formulae for the calculation of load capacity, based on pitting andtooth root breakage. At pitch line velocities below 1 m/s the gear load capacity is often limited by abrasivewear (see other literature for information on the calculation for this).