加拿大外贸
which uses torque factors and polished-rod load and position datatogether with counterbalance weight.
[ 本帖最后由 rockzl630 于 2010-4-3 15:35 编辑 ]
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:L Frank 要出来收拾你了···
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为什么啊，什么意思？
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你这是论文吧，这也太为难人了吧。我表示心有余而力不足。。。
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呵呵，试着翻翻吧，谢谢各位啊
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The pnt pumping system has a relatively constant speed on most of the upstroke and most of the
downstroke.
点泵系统在大多数上行冲程和下行冲程里有一个相对恒定的速度。
个人猜测pnt是point的缩写
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The linkage of the RotaFlex system results in a constant torque arm (or torque factor) on the gearbox, which is equal to one-half of the pitch diameter of the driving sprocket that is attached to the gearbox during most of the stroke.
RotaFlex系统的连接导致一个作用于变速箱的恒定的扭矩臂（扭矩参数），相当于驱动链齿轮（在大多数冲程中附在变速箱上）的节径的一半。
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The constant torque arm (or torque factor) and positive loads on most of the upstroke and downstroke (when the unit is balanced and the pump is full) result in work requirement by the motor during most of the upstroke and downstroke.
恒定额扭矩臂（扭矩参数）和正向载荷在大多数上行冲程和下行冲程中（当单元处于平衡和泵是满的时候）导致了对马达的工作需求。
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At the very top and the bottom of the stroke, the moment arm becomes zero and the motor power requirement is low during these reversals.
在冲程的顶端和底端，瞬时（扭矩）臂会变成零，在这个反向过程中对马达动力的需求会很小。
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The weight of the counterweight box including the auxiliary weights should equal approximately the buoyant weight of the rods plus one-half of the fluid load.
“对重箱”的重量包括辅助机构的重量必须近似等于杆的“浮重”加上一半的可变载荷。
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Thus, energy must be supplied to the system during the polished rod upstroke because the weight of the rods plus the fluid load exceeds the weight of the weight box including the auxiliary weights.
然而，在“光杆”上行冲程中，能量必须提供给系统，因为杆的重量加上可变载荷将大于“对重箱”的重量（包括辅助机构重量）。
[ 本帖最后由 7788414 于 2010-4-3 13:11 编辑 ]
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谢谢，这个看来是有点难度呀
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During the polished rod downstroke, the weight of the weight box exceeds the buoyant rod weight so power must be supplied to the system in order to raise the weight box while the rods are being lowered.
在“光杆”下行冲程中，“对重箱”的重量大于杆的“浮重”，所以必须提供力给系统，在杆被降低时举升“对重箱”。
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7788414
太感谢你了
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For efficient operations, the pump should be completely filled with liquid so that the traveling valve will open at the top of the downstroke and remove the fluid load from the polished rod.
在经济的操作方式中，泵应该被装满液体，这样游动阀将在下行冲程的顶端开启，降低来自“光杆”的可变载荷。
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