Servo direct-driven oil pumping unit

Abstract

The invention discloses a servo direct-driven oil pumping unit. According to the servo direct-driven oil pumping unit, a servo motor is used as a power source; the servo motor forwards and reverses, the speed is reduced by a secondary planet-gear speed reducer, a master synchronous pulley is driven by the primary synchronous belt drive to do low-speed forward and reverse rotation movement, the master synchronous pulley drives an opening synchronous belt which is meshed with the master synchronous pulley to reciprocate, both ends of the opening synchronous belt are connected with a plurality of steel wire ropes; the steel wire ropes at one end are connected with a load through a rope hanger, and the steel wire ropes at the other end are connected with a weight box; and sand stones are filled in the weight box. The servo direct-driven oil pumping unit has the advantages that: a drive system is compact; the middle speed reduction mechanism is simple; the servo motor with good speed regulation performance is used for directly driving and inverting and is matched with a servo speed regulation system; and the weight box is used for directly balancing. Thus, the oil pumping unit has the characteristics of long stroke, low stroke frequency, high efficiency, low power consumption, easy parameter regulation, simple structure, easy operation and the like.

Description

Technical field: [0001] The invention relates to an oil pumping unit used in a rod oil production system in oil field production, in particular to a servo direct drive beamless pumping unit, which belongs to the technical field of oil production machinery. Background technique: [0002] The most widely used at home and abroad is the beam pumping unit. The beam pumping unit has low transmission efficiency due to the cumbersome transmission mechanism, heavy structure, high motor operating power, high energy consumption, and the beam pumping unit is difficult to adjust stroke times due to structural limitations. Beamless pumping units mainly include wide belt pumping units, linear reciprocating pumping units, sky wheel pumping units and so on. Because the beamless pumping unit eliminates the heavy beam, it is easy to realize long stroke, relatively small stroke loss, large effective stroke, and relatively low stroke times, which improves the pump efficiency and improves the wo...

AI Technical Summary

Problems solved by technology

However, the existing beamless pumping units generally use three-phase AC asynchronous motors with poor speed regulation performance. During the frequent positive and negative rotations, the acceleration is large and the inertial load is large, resulting in high power consumption of the motors, and the existing The beamless pumping unit has a complex structure, many moving parts, high cost, difficult maintenance and high failure rate

All of these have greatly limited the popularization and application of beamless pumping units

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