本发明结构简单、合理，方便生产，方便使用，易于更换，可以改变传动螺母的往复行程。
The invention has the advantages of simple and reasonable structure, convenient production, convenient use and easy replacement, and can change the reciprocating stroke of the driving nut.
圆弧形自动门是往复摆动，其运动参数是每分钟摆动次数、摆角大小和行程速比系数等。
The circular arc automatic door is reciprocating swing, and its motion parameters are the number of swing per minute, the size of the swing Angle and the travel speed ratio coefficient.
往复压缩机部分行程压开吸气阀调节是一种调节范围大、操作简单且经济实用的排气量调节方法。
Unloading inlet valves at partial stroke is one means of capacity regulating for reciprocating compressor, and it possesses economic, full-range and easy-using character.
活塞行程长度1，以及活塞每分种在缸套种往复的次数n有关。
Piston stroke length of 1, as well as the piston per minute species reciprocating cylinder liner at the number (referred to as red pump or pump a few) n-related.
对于三缸低波动往复泵，理论上应使三个活塞在排出行程（吸入行程）中的速度之和为一常数，采用凸轮机构能达到这一目的。
Theoretically the sum of the velocities of the three pistons on the discharge stroke in a low-fluctuation triplex pump should be a constant, and this can be achieved by means of the cam mechanism.
对于三缸低波动往复泵，理论上应使三个活塞在排出行程（吸入行程）中的速度之和为一常数，采用凸轮机构能达到这一目的。
Theoretically the sum of the velocities of the three pistons on the discharge stroke in a low-fluctuation triplex pump should be a constant, and this can be achieved by means of the cam mechanism.
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