齿轮 蜗轮负载能力计算

[中文适用范围]： 交叉参考： ISO 701:1998 ISO 1122-2:1998 ISO/TR 10828:1997 DIN 3974-1:1995 DIN 3974-2:1995 ISO 1122-1:1998 ISO 6743-6:1990 ISO/TR 10064-4: 1998 ISO 10347:1999 ISO/TR 10495:1997 EN 1561:1997 EN 1563:1997 EN 1982:1998 DIN 1691 DIN 1693 DIN 1705 DIN 1714 DIN 3975 DIN 1709 DIN 3974-1 DIN 3974- 2 DIN 3979 BS 721-2： 1983年 [外文原描述]： This document specifies formulae for calculating the load capacity of cylindrical worm gears and covers load ratings associated with wear, pitting, worm deflection, tooth breakage and temperature. Scuffing and other failure modes are not covered by this document. The load rating and design procedures are only valid for tooth surface sliding velocities, , less than or equal to 25 m/s and contact ratios greater than 2,1. For wear, load rating and design procedures are only valid for tooth surface sliding velocities which are above 0,1 m/s. The rules and recommendations for the dimensioning, lubricants or materials selected by this document only apply to centre distances of 50 mm and larger. For centre distances below 50 mm, method A applies. The choice of appropriate methods of calculation requires knowledge and experience. This document is intended for use by experienced gear designers who can make informed judgements concerning factors. It is not intended for use by engineers who lack the necessary experience. See 4.7. WARNING — The geometry of worm gears is complex, therefore the user of this document is encouraged to make sure that a valid working geometry has been established.