Abrasion-resistant slurry pump

Abstract

The invention discloses an abrasion-resistant slurry pump and belongs to the field of rotary power pump equipment. The abrasion-resistant slurry pump comprises a front bump body with a suction inlet, a rear pump body and a discharging opening, and each of the front pump body and the rear pump body is composed of at last of three layers of materials including a metal case, a composite abrasion-resistant material and ceramic chips embedded in the composite abrasion-resistant material; the total number of the ceramic chips is at least 100 pieces. The abrasion-resistant slurry pump is used for delivering abrasive solid-liquid two-phase flow, the ceramic chips are high in fixation reliability and are more advantageous in process and cost, service life is long, and good abrasion-resistant effect is achieved.

Description

technical field [0001] The invention relates to the field of rotary power pump equipment, in particular to a wear-resistant slurry pump body. Background technique [0002] In industries such as mineral processing and smelting, centrifugal pumps are often used to transport some abrasive solid-liquid two-phase flows, and slurry pumps are often used. Common slurry pumps are usually made of wear-resistant alloys such as Cr26 and Cr15Mo3. The slurry pumps made of these wear-resistant materials are difficult to meet the use requirements in many working conditions. The main problems are as follows: 1. The problem of wear is prominent, and the flow parts Life often can not meet the requirements of use. 2. The anti-cavitation performance is poor. This is because as the concentration of the two-phase flow increases, the fluidity of the medium continues to decrease, and the NPSH is much smaller than that of clean water, resulting in cavitation when the flow rate of the pump is much lo...

AI Technical Summary

Problems solved by technology

Common slurry pumps are usually made of wear-resistant alloys such as Cr26 and Cr15Mo3. The slurry pumps made of these wear-resistant materials are difficult to meet the use requirements in many working conditions. The main problems are as follows: 1. The problem of wear is prominent, and the flow parts The service life often cannot meet the requirements of use

2. The anti-cavitation performance is poor. This is because as the concentration of the two-phase flow increases, the fluidity of the medium continues to decrease, and the NPSH is much smaller than that of clean water, resulting in cavitation when the flow rate of the pump is much lower than the calibration value. Not only the wetted parts are easily damaged, but the performance of the pump such as efficiency, head, flow, etc. are obviously reduced

This scheme has the following problems in practice, one requires too many types and specifications of ceramic sheets, and the manufacturing process and cost of the ceramic sheets are not considered; the other is that the process and cost of fixing the ceramic sheets are not considered. In actual manufacturing, ceramic sheets of different shapes need to be placed in specific positions like complex building blocks, and cannot be misplaced, which makes the operation very difficult and costly; the third is that the gap between the ceramic sheets is large, and this Even if a variety of ceramic sheets with different shapes are used to adapt to the complex shape of the flow surface, there will inevitably be large gaps between the ceramic sheets. Even if these large gaps are filled with composite wear-resistant materials, they will It becomes the weak point of the structure and is firstly worn and perforated. The fourth is that it does not consider how to position the ceramic sheet during operation. Even if a lot of energy and cost are spent to solve the first two problems, the composite wear-resistant material is filled in the back If the ceramic sheet is not fixed properly and shifts during the process, all previous efforts will be wasted

[0007] In other working conditions, the medium contains larger solid particles, such as the particle size reaches 5-10mm, the solid particles may be stuck between the gap between the impeller and the pump body during operation and squeeze the pump body, this kind of Under such circumstances, it is very easy to cause the overall rupture of the pump body made of ceramic sheets or composite wear-resistant materials, and the technologies disclosed in CN105201914A and CN201083212 cannot be used

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