Efficient high-pressure horizontal multi-stage centrifugal pump

Abstract

A high-efficiency high-pressure horizontal multi-stage centrifugal pump, related to the technical field of centrifugal pumps, including a suction section, a middle section, a guide vane, an impeller, a pump shaft, a water-lubricated bearing, an outlet section, an axial force balance mechanism and a seal, etc., and is characterized in that The suction port of the pump is different from the radial arrangement of all previous horizontal multistage pumps, but is arranged in the axial direction, which greatly improves the hydraulic efficiency of the first stage impeller and the cavitation performance of the pump; , the liquid lubricated shaft is installed inside the hydraulic part; the sliding bearing near the outlet section also acts as a balance hub for balancing the axial force, and together with the balance plate constitutes an automatic axial force balancing mechanism; the pump uses an internal liquid sliding bearing, only One shaft extension, compact structure, only one set of seals. It has the advantages of less friction pairs, high efficiency, good reliability, less wearing parts, and easy disassembly and assembly. The present invention is suitable for all occasions of conveying cleaning liquid.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pumps, and in particular relates to a high-efficiency high-pressure horizontal multistage centrifugal pump, which is mainly used to provide seawater reverse osmosis high-pressure energy in reverse osmosis seawater desalination production devices with a level of more than 10,000 tons, and can also be applied to the transportation of clean media . Background technique [0002] The power consumption of the high-pressure pump providing reverse osmosis pressure in the reverse osmosis seawater desalination production device accounts for 70% of the power consumption in the entire water production process. Therefore, the efficiency of the high-pressure pump directly affects the price of seawater desalination per ton of water, and Most of the production devices are left unattended and have no professional equipment maintenance and repair personnel. As a result, the requirements for pump efficiency, rel...

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Problems solved by technology

[0003] In order to solve the problems of low efficiency, complex structure and difficult maintenance in the prior art, the present invention provides a high-efficiency high-pressure horizontal multi-stage centrifugal pump, which is composed of water inlet and outlet parts - water inlet section, water outlet section, hydraulic components for energy conversion - First-stage impeller, guide vane, middle section, secondary impeller, axial force automatic balance device-sliding bearing (discharge section), balance hub-bearing, wear-resistant ring, balance disc, return pipe, supporting parts-sliding bearing (suction section ), shaft sleeves, mechanical seal parts-back cover, mechanical seal and couplings-impeller nuts, through-bar bolts, which are characterized in that the inlet of the multi-stage centrifugal pump is changed from traditional radial suction to axial suction, and the supporting parts are composed of The liquid lubricated bearings installed inside the hydraulic components replace the metal bearings, and the axial force automatic balance device uses sliding bearings as the balance drum. The stage guide vane also serves as a bearing support, canceling the shaft extension at one end, and only needs a set of mechanical seal

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