Crank connecting structure of pumping unit

Abstract

The invention relates to a crank connecting structure of a pumping unit. The crank connecting structure comprises a bearing box, a bearing cover, a self-aligning roller bearing, a crank pin shaft, a connecting rod, a grease fitting and a screw plug. The bearing box comprises an open box body with a hollow cavity. The bearing cover is used for sealing an opening of the bearing box. The self-aligning roller bearing is arranged in the bearing box. The crank pin shaft penetrates into the bearing box and is in shaft connection with the self-aligning roller bearing. The connecting rod penetrates the bearing box, is perpendicular to the crank pin shaft and is in rotary connection with the self-aligning roller bearing and the crank pin shaft at the same time. The grease fitting is arranged on the bearing cover and used for injecting lubricating grease into the bearing box. The screw plug is arranged on the side, opposite to the grease fitting, of the bearing box and used for discharging redundant lubricating grease injected into the bearing box by the grease fitting. The defects in the prior art are overcome, lubricating grease is fully utilized, it is guaranteed that a left bearing cavity and a right bearing cavity are filled with lubricating grease, full bearing lubricating is achieved, high safety and reliability are achieved, and use is convenient.

Description

technical field [0001] The invention relates to the technical field of oil extraction equipment, in particular to a crank connection structure used on an oil pumping unit. Background technique [0002] At present, commonly used beam pumping units mainly include: counter-crank balanced beam pumping unit, front beam pumping unit, conventional beam pumping unit and conventional beam pumping unit. From the structural analysis, it can be known that the above pumping units belong to the four-bar linkage mechanism. Generally speaking, the structure includes: beams, brackets, donkey heads, rope hangers, connecting rods, reducers, cranks, bases and motors. , the bracket is connected to the base by means of bolts, the beam is installed on the top of the bracket by means of the central bearing seat, the donkey head is installed on the front end of the beam, the rope hanger is fixedly connected to the donkey head, the base is equipped with a motor, and the motor is connected to the dece...

AI Technical Summary

Problems solved by technology

The self-aligning roller bearing is a key part of the operation, maintenance and daily inspection of the beam pumping unit. During normal maintenance, we add grease to the bearing cover. With the extension of the operation time of the pumping unit, the inside of the bearing box The lubricating grease is continuously reduced, which is prone to dry grinding, abnormal noise, roller damage, etc., which will eventually lead to bearing jamming, wear of the crank pin taper sleeve, and even accidents such as pumping unit overturning.

[0005] Another situation is: there is still a lot of grease in the end cover, but it is squeezed to one side of the bearing box, resulting in insufficient use of the grease

Images