在某些抽油机上，旋转平衡块可由改变其在曲柄臂上的位置进行调整。
On some pumpers, the rotary counterbalance can be adjusted by shifting the position on the crank arms.
并对两种机型提出了曲柄平衡位置工作实用图表，可供前置式抽油机设计和使用者参考。
Practical working charts for the crank balanced position of two types of units, which will give a reference to the designers and operators, are offered.
(上止点)-当活塞离曲轴最远时，曲柄和活塞的位置。
TDC (top dead center) - the position of the crank and piston when the piston is farther away from the crankshaft.
对曲柄摇杆机构极限位置进行运动倒置分析，作出相应辅助圆，从而设计出满足条件要求的机构。
Analyzing the motion inversion of the limit of the crank rocker mechanism, drawing the relative supplementary circle, and designing the mechanism up to requirement.
在曲柄摇杆机构中，当以摇杆为原动件时，工作一个循环以后，直观看出有两次死点位置出现。
In the crank and rocker mechanism, when the rocker acts as the driving link, there will be two dead points in one working cycle.
并用图解法或解析法（矩阵形式）对这种类型的机构构件位置的确定、机构有曲柄存在的条件、以及对这类机构的运动分析、力分析等均加以举例讨论。
With the graphical or analytical approaches, the author discusses how to determine the position of the mechanism member, the mechanism with crank, and kinematic and dynamic analyses of such me…
阐述了确定行程速比系数和的平面曲柄摇杆机构最小传动角位置和大小的新方法。
According to its equivalent mechanism-crank rocker mechanism, driving performance and minimum driving Angle position of movable tooth is analyzed.
根据以机构极端位置建模导出的曲柄存在条件，应用机架变换法导出了两自由度铰链五杆机构（不论连架杆是否为主动件）的全部类型。
According to the condition of crank existence, all types of 5-bar linkage with 2-degree of freedom are synthesized by linkage mould in extreme position.
根据以机构极端位置建模导出的曲柄存在条件，应用机架变换法导出了两自由度铰链五杆机构（不论连架杆是否为主动件）的全部类型。
According to the condition of crank existence, all types of 5-bar linkage with 2-degree of freedom are synthesized by linkage mould in extreme position.
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