A wear-resistant semi-open solid-liquid two-phase flow pump impeller with detachable working surface

Abstract

The invention discloses a wear-proof semi-open type solid-liquid two-phase flow pump impeller with detachable working faces. The impeller comprises an impeller rear cover plate; a plurality of basic blades are evenly arranged on the impeller rear cover plate in a peripheral direction; each basic blade is equipped with a blade working face lining plate; each blade working face lining plate is in aC shape, and can be attached to the working face, the inlet end face and the outlet end face of the corresponding basic blade; and each blade working face lining plate and the corresponding basic blade are detachably connected. According to the impeller, the blade working face lining plates and inlet edges are detachable, so that the impeller is prevented from frequently replaced, and the maintenance cost of the impeller is reduced.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, in particular to a wear-resistant semi-open solid-liquid two-phase flow pump impeller with detachable working face. Background technique [0002] Solid-liquid two-phase fluids widely exist in nature and in many industrial productions. Under the condition of transporting two-phase media such as sediment particles, the wear of the main hydraulic components will lead to a serious decline in pump performance. The impeller is the core component of the centrifugal pump. Continuously provide energy for the flowing medium, and the long-term erosion of the impeller by particles will cause serious wear of the impeller, which will further cause a sharp decline in pump performance. How to solve the wear of pump flow parts, especially the impeller, has always been a bottleneck in the industry. With the gradual promotion of the application of solid-liquid two-phase flow centrifugal pumps, the problem o...

AI Technical Summary

Problems solved by technology

The current design method of the solid-liquid two-phase flow pump cannot meet the increasingly complex working conditions, and the particle wear has not been solved well. The wear is mainly delayed by improving the performance of the pump material. The closed impeller, which is widely used at present, once worn Deterioration, the entire impeller can only be scrapped and cannot be maintained, and the replacement of a new impeller will lead to an increase in production costs

[0003] After searching, related patents: CN204113726U fixes and disassembles the blade through sliders, slots and clamping devices, which requires the blade to have a certain thickness to open the slot, which has low applicability, and the processing and disassembly process of the slot is complicated; CN107664139A uses the slot spring The fastening structure fixes and disassembles the blade, but it is difficult to apply to the complex shape of the cylindrical blade and the space-distorted blade, and the structure of the spring and the top post of the cylinder is not easy to be used for disassembling the blade; Sliding and threaded connections to fix and disassemble the blades; the main purpose of the above-mentioned invention patents on detachable blades is to facilitate the disassembly and assembly of the blades, and rely too much on springs and card slots for fixing and dismounting. When conveying granular media, the spring structure and card The groove is easily blocked by particles, resulting in structural failure, and less consideration is given to the wear characteristics of the blade. The method of directly disassembling the entire blade is mainly used, and the material cost of replacing the entire blade is still relatively high.

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