A series vortex pump with step-by-step boosting, high lift and slight impurities

Abstract

The invention discloses a series vortex pump with a step-by-step pressurization and high lift which can contain slight impurities, and belongs to the field of multi-stage pumps. The series vortex pump of the present invention includes a pump body, a pump cover, a transition plate, a pump shaft and a booster impeller, wherein the high-pressure region of the vortex pump cavity of the upper stage is communicated with the low-pressure region of the adjacent vortex pump cavity of the next stage , forming a step-by-step pressurization of the conveying liquid medium; mechanical seals are provided between the pump body and the pump shaft, between each transition disc and the pump shaft, and each booster impeller is installed on the pump shaft in an axial up and down sliding manner. In the present invention, mechanical seals are provided in each stage of the vortex pump cavity, and each stage of the vortex pump cavity only bears part of the pressure under the rated flow, thereby effectively reducing the bearing pressure of each mechanical seal and ensuring the service life of each mechanical seal; and , Each booster impeller is installed on the pump shaft in an axially up and down sliding manner, which has low requirements on the components in the axial direction, overcomes the difficulty of assembling the multi-stage high-lift pump, and is simpler and more convenient to manufacture and assemble.

Description

technical field [0001] The invention relates to a series pump, more specifically, to a series vortex pump with step-by-step pressurization and high head which can contain slight impurities, which can be used for cooling and flushing during the processing of machinery industry equipment. Background technique [0002] There are basically two types of pumps for cooling and flushing in the processing of existing mechanical equipment, and these two types of pumps are suitable for liquids that may contain slight impurities. The first type of pump is a series of ordinary mechanical cooling pumps with many varieties. It is used in ordinary mechanical processing equipment such as turning, milling, planing, grinding, and drilling. The lift is about 4 to 6 meters. It is an ordinary pump. Another type of pump is a multi-stage high-lift pump developed for mechanical equipment such as machining centers, car-based grinding, deep-hole drilling, and gear hobbing machines. The corresponding ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of existing multi-stage high-lift pumps, such as easy damage to mechanical seals, short service life, and great difficulty in manufacturing and assembling, and provide a series vortex pump with step-by-step pressurization and high-lift that can contain slight impurities. The technical solution of the invention uses the transition plate to form a multi-stage vortex pump cavity in the series vortex pump, and the high and low pressure areas of the multi-stage vortex pump cavity are connected in sequence, and between the pump body and the pump shaft, and between each transition plate and the pump shaft There are mechanical seals between them to form multi-stage independent booster vortex pump chambers. Each independent booster vortex pump chamber only bears part of the pressure under the rated flow rate, which effectively reduces the bearing pressure of each mechanical seal and ensures the integrity of each mechanical seal. In addition, each booster impeller is axially and vertically slidably installed on the pump shaft, which has low requirements on the axial direction of the components and can be completed by simple assembly, which overcomes the difficulties in the assembly of multi-stage high-lift pumps. Difficult, making and assembling is simpler and more convenient

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