Flexible transmission mechanism for deep well screw pump

Abstract

The invention discloses a flexible transmission mechanism for a deep well screw pump, which comprises an automatic pressure-balancing device, a split-flow pressure-bearing thrust brake and a flexible coupling device, wherein the automatic pressure-balancing device comprises a first housing, a thrust bearing, a bearing pressure plate and a shaft head pressure-bearing plate, and the thrust bearing, the bearing pressure plate and the shaft head pressure-bearing plate are arranged on a first transmission shaft; a gap Y is remained between the shaft head pressure-bearing plate and the lower end face of a second transmission shaft; the split-flow pressure-bearing thrust brake comprises a second housing, two thrust bearings, two springs and two spring pressure plates, and the two thrust bearings, the two springs and the two spring pressure plates are respectively arranged on the second transmission shaft and a third transmission shaft; and the flexible coupling device comprises a third housing, a fourth joint, a fourth housing, an input shaft, a thrust bearing, a bearing pressing sleeve, a spring, a mechanical seal, a universal shaft and an output shaft, the thrust bearing, the bearing pressing sleeve, the spring and the mechanical seal are arranged on the output shaft, and the universal shaft and the output shaft are arranged in the fourth housing. The flexible transmission mechanism can bear huge axial force and environmental stress, and has the advantages of stable operation, high efficiency, long service life, simple and compact structure and relatively lower production cost.

Description

technical field [0001] The invention belongs to the field of transmission devices, and in particular relates to a deep well screw pump which integrates a pressure balance device, a flow-dividing pressure-bearing thrust device and a flexible coupling device into a whole, the axial force is divided by a spring, and can withstand a huge axial force. Use flexible transmission mechanism. Background technique [0002] In the field of petroleum production, the equipment used in oil production used ground power equipment in the early stage to pump crude oil from the bottom of the well several kilometers deep through plunger pumps and pipe fittings. Due to the large power loss and low efficiency of such equipment, it will be used in the future. It has gradually developed into the use of downhole submersible centrifugal pumps for oil production, and the power is directly placed in the downhole. Since the power is close to the centrifugal pump, the power loss is slight, and the oil pro...

AI Technical Summary

Problems solved by technology

Therefore, the thrust bearing in the current transmission mechanism is extremely easy to damage and has a very low lifespan.

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