英语翻译2.7.SpeedreductionSpeedreductionbetweenthemagazineandthemotormaybeprovidedthroughwormgear,planetarygeartrain,harmonicdrive,etc.Abacklash-freereductionisnecessaryforaccuratepositioningofthetoolsrelativetothespi

Question

英语翻译
2.7.Speed reduction
Speed reduction between the magazine and the motor may be provided through worm
gear,planetary gear train,harmonic drive,etc.A backlash-free reduction is necessary for
accurate positioning of the tools relative to the spindle bore center while changing the
tools.A timing belt is another method which can ensure a zero backlash power transmission.
However,high reduction is very difficult to obtain with timing belts in a very
small area.Very high reduction ratios can be obtained with worm-gear sets in a very small
area.However,worm gears have backlash problems.Moreover,for high reductions,the
efficiency of the system decreases abruptly.If the reduction is done with a very low
efficiency worm gear,the required capacity of the motor size gets bigger,which in turn
increases the cost of the motor and its control system.In zero backlash worm gears,the
worms are of split type and their tooth profiles are special [24].
In planetary-gear systems of low prices,the backlash elimination is obtained by just
decreasing the center distance between the gears until a minimum clearance condition is
reached without too much noise or heating up.This normally causes high starting torque
because of interference,and much lower running efficiency than the same with a normal
backlash condition.There are only a few companies in the world which manufacture zero
backlash planetary gear trains [25].

Answer 1

2.7.减速
杂志和电机之间的速度减少,可通过蠕虫
无反冲减少齿轮,行星齿轮传动,谐波传动等是必要的
准确的定位孔中心相对主轴的工具,同时改变
工具.一个同步带是另一种方法,它可以确保零背隙输电.
然而,高还原是非常困难的同步带获得在一个非常
小面积.在一个非常小,减少比例非常高,可以得到与蜗轮齿轮组
区.然而,蜗轮有反弹的问题.此外,为减少高,
系统的效率急剧下降.如果减少具有非常低的
效率蜗杆,电机大小所需的容量变得更大,这反过来又
增加了电机及其控制系统的成本.在零背隙蜗轮,
蠕虫是分体式和特殊齿廓[24].
在低价格的行星齿轮系统,消除由刚刚获得反弹
减少齿轮之间的中心距离,直到最低的通关条件是
达到无噪音太大,或升温.这通常会导致高起动转矩
因为与正常的干扰,运行效率低得多,比同
反弹的条件.只有在世界上几家公司生产零
背隙行星齿轮系[25].