Direct-drive pumping unit of permanent-magnet disk-type motor

Abstract

The invention discloses a direct-drive pumping unit of a permanent-magnet disk-type motor. The direct-drive pumping unit comprises a frame, a permanent-magnet disk-type servo motor, a brake, a synchronous pulley, a drive shaft, a drive wheel base, a guide pulley, a pulley base, an opening synchronous belt and the like. The permanent-magnet disk-type servo motor is adopted as a power source; a motor output shaft is the drive shaft and directly drives the synchronous pulley in key connection with the motor output shaft to rotate positively and reversely; the synchronous pulley also pulls the opening synchronous belt meshed with the synchronous pulley to move in a reciprocating manner, and the two ends of the opening synchronous belt are connected with a plurality of steel wire ropes. The direct-drive pumping unit of the permanent-magnet disk-type motor, disclosed by the invention, has the beneficial effects that: a transmission system is very simple without a middle retarding mechanism; the direct-drive pumping unit is directly driven and reversed by the permanent-magnet disk-type servo motor with excellent governing performance and is matched with a servo speed control system, in addition, a weight box is adopted for performing direct balancing, so that the pumping unit has the advantages of long stroke, low jig frequency, high efficiency, low power consumption, easy adjustment of parameters, simple structure, convenience in 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 permanent disk servo motor 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 efficienc...

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

Images