Nano structure metal screen-polyurethane composite anti-wear impeller and its preparing process
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A technology of nanostructure and wire mesh, which is applied to mechanical equipment, components of pumping devices for elastic fluids, non-variable pumps, etc., can solve the problems of short service life of impellers, reduce production costs, and facilitate Large-scale industrial production, overcoming the effect of low strength
Inactive Publication Date: 2005-08-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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[0004] The purpose of the present invention is to overcome the shortcomings of the short service life of existing impellers, and provide a nano-structured wire mesh that can meet the requirements of various types of material delivery pumps for impellers under complex working conditions in various industries such as impact, corrosion, and wear. —Polyurethane composite wear-resistant impeller and its preparation process
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Embodiment 1
[0029] The preparation process steps of embodiment 1 are as follows, referring to the process flow Figure 5 .
[0030] a. Weaving 0.5mm nanostructured metal wires into nanostructured wire mesh 1 with a wire mesh weaving machine;
[0031] b. Punch out the shapes of the front cover plate 3, rear cover plate 4 and blade 5 of the impeller;
[0032] c. Wash the nanostructured wire mesh 1 with acetone, derust, degrease and decontaminate the surface, laminate and fix it;
[0033] d. The processed nanostructure wire mesh 1 is placed in the cavity of the casting impeller mold (ie the cavity where the front cover plate 3, the rear cover plate 4 and the blade 5 are located);
[0034] e. Pour polyurethane in a molten state at a temperature of 90-100°C into the cavity of the mold and pressurize it;
[0035] f. After 18 to 25 minutes of cooling and solidification, open the mold to make the shaft hoop 6 made of polyurethane material, the front cover 3, the rear cover 4, and the blade 5 a...
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Abstract
The impeller consists of front cover plate, back cover plate, blades and hub. The front cover plate, the back cover plate and the blades fixed on the hub are made of closely laminated nanometer structure metal screen and polyurethane composite material. The present invention has the advantages of high anti-cracking strength, lowered polyurethane consumption and low production cost. The polyurethane elastomer fixes and protects the nanometer structure metal screens against medium corrosion to result in high integral strength, high wear resistance, excellent damping performance and long service life.
Description
technical field [0001] The invention belongs to the field of conveying materials such as ore pulp, mud, petroleum, pulverized coal, etc., and relates to a mechanical device for conveying materials and a preparation process thereof, in particular to a composite wear-resistant impeller and a preparation process thereof. Background technique [0002] Coal, metallurgy, mining, electric power and other industrial industries widely use mortar pumps, slurry pumps, mud pumps, pulverized coal pumps, etc. to transport ore slurry, mud, pulverized coal, etc., and the consumption is huge. The impellers used in various pumps are severely eroded by the strong erosion of materials during high-speed operation, and even in most working conditions, they are accompanied by medium corrosion, which further aggravates the wear. As a result, the conveying efficiency of the material is reduced, the balance of the impeller is destroyed, strong vibration and noise are caused, and even the entire mater...
Claims
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Patent Type & Authority Applications(China)
IPC IPC(8): F04D7/04F04D29/02F04D29/24
Inventor 许云华岑启宏付永红王永平武宏
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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