Two-way thrust universal coupling for high-stability screw pump

Abstract

The invention discloses a two-way thrust universal coupling for a high-stability screw pump and belongs to the technical field of submersible machinery. An upper gear sleeve (9) and a lower gear sleeve (17) are fixedly arranged at the upper end and the lower end of a connecting pipe (11); the lower end of an upper gear shaft (4) is meshed with inner teeth of the upper gear sleeve (9) through an upper zero-tooth-difference inner-meshing drum gear (8); the upper end of a lower gear shaft (21) is meshed with the inner teeth of the lower gear sleeve (17) through a lower zero-tooth-difference inner-meshing drum gear (13); knuckle bearings comprise a first knuckle bearing (6), a second knuckle bearing (10), a third knuckle bearing (16) and a fourth knuckle bearing (18); the first knuckle bearing (6) and the second knuckle bearing (10) are oppositely arranged at the two ends of the upper zero-tooth-difference inner-meshing drum gear (8); the third knuckle bearing (16) and the fourth knuckle bearing (18) are oppositely arranged at the two ends of the lower zero-tooth-difference inner-meshing drum gear (13). The two-way thrust universal coupling for the high-stability screw pump has the advantages that the carrying capacity is high, and the two-way axial force can be borne.

Description

technical field [0001] The utility model relates to a two-way thrust universal coupling of a screw pump with high stability, which belongs to the technical field of submersible machinery. Background technique [0002] Submersible screw pump oil recovery technology is a new type of oil recovery technology that has gradually attracted worldwide attention in recent years. The electric submersible screw pump is a rodless oil production equipment, suitable for high viscosity heavy oil wells, high sand content, gas wells and deviated wells, and has unique advantages incomparable with traditional equipment. The special universal coupling for electric submersible screw pump is one of the key components of the electric submersible screw pump oil production system. It connects the power output shaft of the motor and the rotor of the screw pump. At the same time, it is necessary to realize the conversion of the fixed-axis motion of the input shaft connected to the motor end to the pla...

AI Technical Summary

Problems solved by technology

[0003] At present, the special universal couplings for electric submersible screw pumps mostly use spherical pairs to realize the transformation of the motion form, but the current special universal couplings can only bear the downward axial force, and cannot bear the force generated when the screw pump rotor reverses. upward axial force, and usually only one tapered roller bearing is used to radially locate the input shaft, and the centering effect is not ideal

The spherical pair of steel ball bearing the axial force is in point-surface contact, which is easy to be crushed and cause the failure of the special coupling

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