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 an automatic variable speed wide swing angle oil pumping unit. Background technique

[0002] The traditional beam pumping unit is after the motor is decelerated once, the connecting rod mechanism is connected, and then the crank is rotated to drive the sucker rod to reciprocate up and down to realize the oil pumping function. The same speed as the downstroke, the same stroke distance, and the same amount of time spent. However, in actual work, the edge of the oil pumping unit located in the underground passage will wear out after a period of use, and there will be a gap between the worn oil pumping unit and the underground passage. If the time is the same, the oil pumped up will flow down from the gap in a large amount. If the upstroke time of the oil pumping unit is shortened on the premise of ensuring the oil pumping efficiency, the problem of up-pumping and d...

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