Double-spiral elliptic sealing engagement pair for conveying high-viscosity multi-impurity fluid medium

Abstract

The invention discloses a double-spiral elliptic sealing engagement pair for conveying a high-viscosity multi-impurity fluid medium, and belongs to the technical field of screw pump engagement pairs. The double-spiral elliptic sealing engagement pair is characterized in that a screw rotor (8) includes an engagement end and a material inlet end; two sets of elliptic sealing discs (5) are symmetrically distributed between two sides of the engagement end and a shell (3), and are rotationally mounted on two sides of the screw rotor (8) through rotating shafts (4); the screw rotor (8) is provided with engagement grooves (804) engaged with the two sets of elliptic sealing discs (5); and an inlet spiral groove (803) is formed in the material inlet end of the screw rotor (8). The double-spiral elliptic sealing engagement pair forms self-driving force through complete engagement of the elliptic sealing discs and the engagement grooves on the screw rotor to realize the screw rotor self-driven revolving motion; and the elliptic sealing discs form two periodic-changed working cavity volumes, so that the volume utilization rate of the sealing discs and a screw is increased, and the operation reliability and stability of the screw pump are guaranteed.

Description

technical field [0001] The utility model relates to a double-helix elliptical sealing engagement pair for conveying high-viscosity and multi-impurity fluid medium, which belongs to the technical field of screw pump engagement pairs. Background technique [0002] In recent years, with the continuous reduction of terrestrial fossil resource reserves, the exploitation and transportation of offshore oil and gas resources have developed rapidly. However, the marine environmental pollution caused by the development of offshore oil and gas fields has become more and more prominent. Also getting bigger and bigger. Rapid and effective recovery of oil spilled at sea is crucial to the protection of the marine ecological environment and the safety of human survival. On the other hand, in the process of petrochemical production, a large amount of oily sludge waste is continuously generated and accumulated, which needs to be cleaned regularly. However, since this part of the marine oil ...

AI Technical Summary

Problems solved by technology

However, during the entire working process of the pump body, only part of the meshing area between the sealing disc and the screw rotor is the working area of ​​the pumped fluid, and the other part of the meshing area is the return area, resulting in screw rotor low utilization

Moreover, this meshing feature prevents the two sealing discs from being driven to rotate by the screw rotor. In order to meet the periodic motion relationship, an additional auxiliary connection device is required between the two sealing discs, resulting in a complex structure of the screw pump, which is bulky and heavy. The adaptability of the impurity medium is poor, and the existence of auxiliary connection devices also greatly reduces the reliability and efficiency of the screw pump operation

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