The main drive chain and the bearing chain divide the polished rod load into reverse pumping load and equilibrium load.
主传动链与承载链将悬点载荷分解为换向抽汲载荷与平衡载荷。
So the pumping flow can be increased to burden more load with the permission of pumping and injection.
因此在抽水和回灌允许的情况下，可以加大抽水流量，使井承担更大的负荷。
This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
摘要抽油机中载荷变化大，易引起电动机转速和转矩的波动。
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