Multistage deep sea mixture pump with axial force transmission structure

Abstract

The invention discloses a multistage deep sea mixture pump with an axial force transmission structure. The pump comprises a pump case. Two ends of the pump case are fixedly provided with an inlet pumpcover and an outlet pump cover. The other end of the outlet pump cover is fixedly connected with an outlet connecting pipe. The outlet pump cover is coaxially provided with an outlet bearing pedestal. The other end of the inlet pump cover is fixedly connected with an inlet connecting pipe, a bearing box, and a motor. The inlet pump cover is coaxially provided with an inlet bearing pedestal. The bearing box is internally provided with a bearing box shaft. One end of the bearing box, far away from a motor, extends into the inlet connecting pipe. The pump case is internally provided with a pumpshaft. One end of the pump shaft extends into the inlet connecting pipe and is connected with the bearing box by a shaft, and the other end of the pump shaft is in the outlet bearing pedestal. A plurality of stages of static pressure expanders are uniformly sleeved on the pump shaft along an axial direction in sequence. Ends of the pressure expanders, close to the inlet pump cover, are provided with closed impellers which are fixedly coupled with the pump shaft in a cooperated manner. A thrust collar is arranged between a first stage impeller and the inlet bearing pedestal. The pump is high inoperation efficiency under a working condition of high gas content, and the pump is easy to process and install.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and engineering equipment, and in particular relates to a multistage deep-sea mixed transportation pump with an axial force transmission structure. Background technique [0002] With the rapid development of economy and industry in all countries in the world, the demand for mineral resources such as oil and gas is increasing day by day, while land mineral resources are decreasing day by day. As the last undeveloped area in the world, the deep sea has very large mineral resources reserves. It is rich and has caused scientists from all over the world to study it. [0003] The deep-sea oil and gas production and transportation technology studies how to collect and transport the rich oil and gas resources on the seabed to the sea surface, and the mining technology that lifts oil and gas resources from the seabed to the sea surface is the core technology of deep-sea production and transportatio...

AI Technical Summary

Problems solved by technology

However, due to its poor operation under high gas content conditions, it is rarely used in subsea mixed transportation systems; and when multi-stage pumps are working, the liquid pressure on both sides of the impeller is different, and the pressure on the inlet side is lower , under the action of pressure difference, an axial thrust to the inlet side will be generated, and the impeller will be displaced under this force, so the impeller needs to be positioned axially. This method is more suitable for single-stage pumps, but for the deep-sea multi-stage pumps of this project, not only does not use installation, but also because the shaft shoulder increases the cross-sectional area of ​​the main shaft, more rods are required for processing. material and increase the difficulty of processing

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