Electric motor direct-drive dead-weight balanced type beam-pumping unit

Abstract

An electric motor direct-drive dead-weight balanced type beam-pumping unit comprises a rope hanger, a horsehead, a walking beam, a balance weight, a brake disc, a brake device, an electric motor, a crank, a connecting rod, a rear support, a braking connecting rod, a brake handle, a variable-frequency cabinet, a hinge, a base and a front support. The rope hanger is hung on the horsehead at the front end of the walking beam. The front support on the base and the middle of the walking beam are connected through a middle bearing. The bottom face of the rear portion of the walking beam is provided with the electric motor. The crank is arranged on the electric motor through a shaft and connected with the connecting rod through a crank and pin assembly. The other end of the connecting rod is connected with the hinge fixed to the base. The balance weight is arranged at the rear portion of the walking beam. The brake disc is arranged at the tail portion of the walking beam. The brake device outside the brake disc is supported by the rear support on the base. The brake device is controlled by the brake handle through the braking connecting rod. By means of the magnetic-coupling low-speed electric motor, the requirement for low-speed high-power output is met, and a transmission mechanism of the beam-pumping unit is simplified; the dead-weight balanced type beam-pumping unit with the electric motor is simple in structure, stable in working performance and capable of saving energy sources and reducing maintenance expenses.

Description

technical field [0001] The invention relates to a beam pumping unit for exploiting oil in an oil field, in particular to a motor direct-driven self-weight balanced beam pumping unit. Background technique [0002] At present, the beam pumping unit is one of the main types of pumping units used in oil fields. Its working principle is: the electric motor is used as the power, and the belt transmission is used to drive the reduction box to work. The output shaft of the reduction box outputs low-speed motion, and drives the crank to rotate, and is driven by the connecting rod, the beam and the donkey head rope suspension. The polished rod, the sucker rod column and the oil well pump do reciprocating motion. This traditional beam pumping unit has the following problems: first, the structure is complex; second, the working stability is poor, the gears on the reduction box are prone to wear or broken teeth, and the belt is easy to break; third, the energy consumption is high, and t...

AI Technical Summary

Problems solved by technology

[0003]The purpose of the present invention is to solve the problems in the prior art that the beam pumping unit has complex structure, poor working stability, high energy consumption and high maintenance cost. Provide a motor direct drive self-weight balanced beam pumping unit

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