Efficient energy-saving oil pumping machine

Abstract

The invention discloses an efficient energy-saving oil pumping machine, which comprises a derrick, an oil pumping rod, a movable pulley set, a hanging rope, a drive motor, a reversing lifting device and a winding drum, wherein the derrick is erected on an oil well; the drive motor, the reversing lifting device and the winding drum are arranged at the bottom of the derrick; the hanging rope is wound on the winding drum; one end head of the hanging rope is fixed at the top of the derrick through bypassing a first fixed pulley and the movable pulley set arranged at the top of the derrick; the other end head of the hanging rope bypasses a second fixed pulley and a third fixed pulley arranged at the top of the derrick to hang a counterweight; a hanging chain is hung on the movable pulley set; the oil pumping rod is hung to the lower end of the hanging chain; an output shaft of the drive motor is connected with an input shaft of the reversing lifting device; and the winding drum is connected with an output shaft of the reversing lifting device. According to the efficient energy-saving oil pumping machine, the drive motor rotates in one direction all the time, and the rotation direction of the winding drum is automatically changed by the reversing lifting device according to the ascending and descending programs of the oil pumping rod, so that the energy loss of the drive motor, a speed reducer and a flywheel in the reversing process is avoided.

Description

technical field [0001] The invention relates to an oil pumping unit, in particular to a high-efficiency and energy-saving oil pumping unit. Background technique [0002] The most widely used pumping unit in the oil field is the beam pumping unit. The suspension point load of the beam pumping unit is a periodically variable load. The torque curve of the suspension point load on the crank shaft of the reducer is sine The curves are very different, causing the net torque curve at the crankshaft to fluctuate wildly, even to appear negative. However, the output speed and torque of ordinary three-phase asynchronous motors are basically constant. In order to meet the peak torque requirements, the pumping unit has to be equipped with a larger power motor, which causes the motor to be at In light load state, the operating efficiency and power factor are very low. Therefore, it is generally believed that the main reason for the low efficiency of the beam pumping unit is that its loa...

AI Technical Summary

Problems solved by technology

The efficiency of the system is low, the energy consumption is high, and the power consumption is high. Therefore, energy saving has become an urgent problem to be solved in the rod pumping system

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