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如图1所示,设摇臂轴等分摇臂(即a=b),当气门间隙△S=0时,若调节螺钉1的螺距为h毫米,则拧松调节螺钉一圈,便可得到气门间隙值△S=h毫米。通常摇臂轴并不等分摇臂,而是a/b=1.3～1.5。这时有关系式;△S/h=a/b,即△S=(1.3～1.5)h 一般柴油机气门间隙值均小于h值。设各机型的气门间隙值为△S_n,与△S_n对应的调节螺钉退出圆心角为n,则△S_n/△S=n/360°即n=△Sn/△S·360°=△S_n/(1.3～1.5)h·360°……(1) 柴油机的调节螺钉一般采用第一类细牙螺纹,常
As shown in Figure 1, the rocker arm shaft is divided into equal parts (ie a = b), when the valve clearance △ S = 0, if the adjustment screw 1 pitch h mm, then loosen the adjustment screw a circle, you can Get the valve clearance value △ S = h mm. Usually rocker shaft does not divide the rocker, but a / b = 1.3 ~ 1.5. At this time there is a relationship; △ S / h = a / b, that is △ S = (1.3 ~ 1.5) h Diesel engine valve clearance values are less than h value. Assuming that the valve clearance value of each model is ΔS_n and the adjustment screw corresponding to ΔS_n exits the center of the circle as n, ΔS_n / ΔS = n / 360 °, that is, n = ΔSn / ΔS · 360 ° = ΔS_n /(1.3~1.5)h*360°....... (1) The adjustment screw of diesel engine generally adopts the first kind of fine thread, often