Automatic speed-changing wide-swing-angle oil pumping machine

Abstract

The invention relates to the technical field of oil extraction machinery, in particular to an automatic speed-changing wide-swing-angle oil pumping machine. The automatic speed-changing wide-swing-angle oil pumping machine comprises an electric motor, a speed changing mechanism, a swing arm support, a swing arm arranged on the swing arm support, a support provided with a fixed pulley and a wellhead oil pumping device, wherein the speed changing mechanism is connected with a driving crankshaft wheel, the driving crankshaft wheel is meshed with a driven crankshaft wheel, the driving crankshaft wheel is connected with a connecting piece through a bearing, one end of the connecting piece is connected with the driven crankshaft wheel, the other end of the connecting piece is connected with the swing arm through a connecting rod, a sliding chute is arranged on the connecting piece of which one end is connected with the driven crankshaft wheel, and a bearing on the driven crankshaft wheel is sleeved in the sliding chute. The automatic speed-changing wide-swing-angle oil pumping machine disclosed by the invention has the advantages that when the two crankshaft wheels are in rotation, since the position of the bearing of a driven pulley is changed, the position of the connecting piece can be also correspondingly changed, a motion trail of the connecting rod is affected by the motion of the connecting piece, the speed of the wellhead oil pumping device in the up-stroke is higher than that in the down-stroke, the oil leakage problem existing in an oil pumping process is avoided, and the oil pumping efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of oil production machinery, in particular to a self-variable speed wide swing angle oil pumping unit. Background technique [0002] The traditional beam pumping unit decelerates the motor once, connects the connecting rod mechanism, and then makes the crank rotate, thereby driving the sucker rod to reciprocate up and down to realize the oil pumping function. At this time, the upstroke of the oil pumping Same speed, same stroke distance, and same amount of time as the downstroke. However, in actual work, the oil pumping device in the underground passage will be worn after a period of use, and there will be a gap between the worn oil pumping device and the underground passage. If the time is the same, a large amount of oil pumped upward will flow downward from the gap. If the upstroke time of the oil pumping device is shortened under the premise of ensuring the oil pumping efficiency, the problem of upward p...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems that the existing oil pumping unit has too long upstroke time, and the existing speed change structure wears a lot in actual work and is easy to leak oil, a speed change structure with strong wear resistance and no oil leakage is specially proposed now. Self-variable speed wide-swing angle pumping unit that needs to add lubricating oil

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