8-shaped seal engagement pair screw pump for large-flow fluid medium conveying

Abstract

The invention aims at providing an 8-shaped seal engagement pair screw pump for large-flow fluid medium conveying. Dirty fatlute fluid media containing multiple impurities can be conveyed, seal discsare designed to be in 8 shapes, displacement is large, the curvature change of an engagement segment is small, and dirty fatlute fluid media containing multiple impurities can be conveyed continuouslyand stably. The 8-shaped seal engagement pair screw pump comprises a hydraulic motor, a connecting frame, a machine shell, a screw rotor and a coupling. One end of the connecting frame and the machine shell are connected together to form an outer shell of the screw pump. The screw rotor is located in the outer shell. The output end of the hydraulic motor and the screw rotor are connected togetherthrough the coupling. The other end of the connecting frame and the hydraulic motor are connected together. The 8-shaped seal discs are symmetrically arranged at in the machine shell and located on two sides of the screw rotor. An engagement pair is formed by the 8-shaped seal discs and a supercharging segment spiral groove, so that when the screw rotor is driven by the hydraulic motor to rotate,the 8-shaped seal discs are driven to rotate around fixed shafts.

Description

technical field [0001] The invention belongs to the technical field of positive displacement pump equipment, and in particular relates to an 8-shaped sealing and meshing secondary screw pump for large-flow fluid medium transportation. Background technique [0002] In recent years, the continuous improvement of the level of science and technology has promoted the continuous growth of people's demand for oil, which has also led to the rapid development of my country's oil industry. In the process of petroleum processing and production, a large amount of sludge will be formed [1] According to statistics from the China Materials Research Association: In 2015, my country produced 32,500 tons of sludge. Sludge is a pollutant produced in various stages of petroleum processing. The composition is extremely complex. It contains more than 10% oil, more than 40% water and a large amount of toxic substances. Once discharged into the environment, it will affect the air and soil in the e...

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. 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 impurity medium has poor adaptability, and the existence of auxiliary connection devices also greatly reduces the reliability and efficiency of the screw pump operation

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