A long-stroke pumping unit

Abstract

The invention discloses a long-stroke pumping unit which comprises a base, a rack, a driving motor, a reversing transmission mechanism, a loading mechanism and a balancing mechanism, wherein the reversing transmission mechanism is located on the upper part of the rack and is connected with the rack through a shaft base, the reversing transmission mechanism is respectively connected with the balancing mechanism through a dragging steel rope and the loading mechanism, the driving motor is connected with the reversing transmission mechanism through a transmission piece, the driving motor drives a reversing roller to rotate, when the reversing roller rotates, a positive and negative screw groove pushes a sliding block to move along a guiding rod in a reciprocated mode, the switching of the upper stroke and the lower stroke of a pumping rod is finished, the rotating speed of the reversing roller and the driving motor is low, a high speed rotating component is replaced, the structure is simple, the upper stroke and the lower stroke of the pumping rod are stable in operation, the impact loading is eliminated, and the service life of the pumping rod and a pump is prolonged. The rolling cylinder reversing long-stroke and low stroke frequency pumping unit is simple in structure, light in weight, energy-saving, material-saving, firm, stable, reliable and convenient to maintain, and the adjusting of the stroke and the stroke frequency is convenient.

Description

technical field [0001] The invention relates to the technical field of oil pumping equipment, in particular to a long-stroke oil pumping unit. Background technique [0002] Among the oil production equipment commonly used in oil fields, the commonly used beam pumping unit is bulky and heavy, and its reducer often weighs 4-5 tons, and has high energy consumption, poor load performance and is difficult to achieve long stroke. Therefore, long-stroke, low-stroke, large-displacement, and heavy-duty pumping units have always been the research and development direction of oil production equipment at home and abroad. Since the pumping unit is continuously unattended in the field with complex geographical climate, the pumping unit is required to be reliable, solid and easy to maintain. The existing steering reversible motor or hydraulic motor drives the forward and reverse rotation of the drum. Oil, but because the motor and the drum reverse need to consume a lot of energy, it is no...

AI Technical Summary

Problems solved by technology

However, its disadvantages are: there are many moving components in the range-extending part, the structure is complex, easy to be damaged, and the reliability is poor. At the same time, because the reversing drive and the range-extending mechanism are arranged on the top of the frame, it is difficult to install and maintain on site. Manufacturing and operation management High difficulty

Secondly, the double crank and double connecting rod structure is easy to form scissors difference, and the connecting rod is long, which requires high material and manufacturing precision of the connecting rod, which brings great difficulty to manufacturing and installation, and increases the weight of the whole machine , increasing the manufacturing cost

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