Direct-drive roller screw oil extracting device

Abstract

The invention relates to a direct-drive roller lead screw oil extraction device, and belongs to the technical research field of petroleum machinery. The direct-drive roller lead screw oil extraction device mainly comprises a permanent magnet motor, a dust cover, a bearing chamber, a vertical cylinder, a packing, a mounting seat, a brake disc, a lead screw, a planetary roller lead screw pair, a slide rail and a guide seat, wherein the permanent magnet motor is mounted in an inverted manner, the mounting seat, the vertical cylinder, the bearing seat, the permanent magnet motor and the dust cover are sequentially connected and fixed on a flange of a wellhead after being assembled, the front end of an output shaft of the permanent magnet motor drives a nut of the planetary roller lead screw pair through the four-claw connector, the lower end of the nut of the planetary roller lead screw pair is connected with the thrust bearing, the brake disc is installed at the tail end of the output shaft of the motor, and a sliding rail, an oil pump, a guide seat and a spring are installed in the vertical cylinder. According to the direct-drive roller lead screw oil extraction device, the permanent magnet motor directly drives the planetary roller lead screw pair, rotary motion is changed into reciprocating linear motion, then a sucker rod is driven to move, and the planetary roller lead screw is stable in motion, high in stability, low in noise, long in service life and high in efficiency.

Description

technical field [0001] The invention relates to a mechanical device for oil recovery in an oil field, belonging to the field of petroleum machinery technology research. Background technique [0002] With the continuous development of industrial technology and the continuous improvement of oil extraction technology, the performance requirements of pumping units are also constantly increasing. At present, oil production pumping units in oil fields are mainly divided into two types, beam pumping units and beamless pumping units. Among them, 80% of the oil wells are produced by the beam pumping unit. The working principle of the beam pumping unit is that after the motor is decelerated by the V-belt reducer, the four-link mechanism converts the rotation of the output shaft of the reducer into a beam. The reciprocating motion of the donkey head drives the polished rod and the sucker rod to reciprocate linearly up and down with the donkey head, and then transmits this motion to th...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the hydraulic components, the sealing and reliability requirements of the hydraulic system are high; the chain pumping unit has many moving pairs, the reversing mechanism is complicated, and the failure rate is high; the ring gear ring of the gear pumping unit is difficult to manufacture. , the gear lubrication requirements are high, the pumping unit as a whole is relatively heavy, and the installation is difficult

Therefore, the advantages and disadvantages of these pumping units coexist, yet to be further studied and perfected

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