Slurry pump impeller

Abstract

A slurry pump impeller (1000), comprising a wear-resistant ceramic layer (10), flexible connection layers (20), and a metal framework (60) which consists of a front cover plate (30), a rear cover plate (40) and several blades (50), wherein the front cover plate (30) and the rear cover plate (40) are arranged opposite each other, the several blades (50) are arranged between the front cover plate (30) and the rear cover plate (40), and the front cover plate (30) is connected to the rear cover plate (40) by means of the several blades (50); the wear-resistant ceramic layer (10) is arranged on a surface of the metal framework (60); the flexible connection layers (20) include a first flexible connection layer and a second flexible connection layer, the first flexible connection layer being arranged between the wear-resistant ceramic layer (10) and the metal framework (60), and the second flexible connection layer being arranged on surfaces of the wear-resistant ceramic layer (10) and the metal framework (60); and a fluid suction inlet (70) is provided in the middle of the front cover plate (30). The slurry pump impeller (1000) has relatively good wear resistance, impact resistance and stability, and has a long service life.

Description

Slurry pump impeller Technical Field

[0001] The present application relates to the technical field of slurry pumps, and in particular to a slurry pump impeller. Background Art

[0002] Slurry pumps are widely used in industries such as mining, power plants, metallurgy, and the chemical industry to transport fluids containing solid particles. During slurry pump operation, impeller life is crucial for determining the pump's hydraulic performance and stable operating indicators. Existing slurry pump impellers are mostly made of carbide or rubber. However, these materials offer poor corrosion and wear resistance, are prone to localized wear, and can lead to failure, resulting in a short impeller life. Therefore, improving impeller life is a pressing issue.

[0003] Utility Model Content

[0004] An embodiment of the present application provides a slurry pump impeller, which has excellent wear resistance, impact resistance and stability and a long service life.

[0005] The embodiment of the present application provides a slurry pump impeller, comprising a wear-resistant ceramic layer, a soft connection layer, and a metal skeleton consisting of a front cover plate, a rear cover plate, and a plurality of blades;

[0006] The front cover plate and the rear cover plate are arranged opposite to each other, the plurality of blades are arranged between the front cover plate and the rear cover plate, and the front cover plate and the rear cover plate are connected through the plurality of blades;

[0007] The wear-resistant ceramic layer is arranged on the surface of the metal skeleton, and the soft connection layer includes a first soft connection layer and a second soft connection layer, the first soft connection layer is arranged between the wear-resistant ceramic layer and the metal skeleton, and the second soft connection layer is arranged on the surface of the wear-resistant ceramic layer and the metal skeleton;

[0008] A fluid suction port is provided in the middle of the front cover.

[0009] In the slurry pump impeller described in the embodiment of the present application, the wear-resistant ceramic layer includes a first wear-resistant ceramic layer, a second wear-resistant ceramic layer, a third wear-resistant ceramic layer and a fourth wear-resistant ceramic layer;

[0010] The first wear-resistant ceramic layer is arranged on the inner surface of the front cover plate facing the rear cover plate, the second wear-resistant ceramic layer is arranged on the inner surface of the rear cover plate facing the front cover plate, the third wear-resistant ceramic layer is arranged on the outer surface of the rear cover plate facing the front cover plate, and the fourth wear-resistant ceramic layer is arranged on the working surface of each of the blades.

[0011] In the slurry pump impeller described in the embodiment of the present application, the first wear-resistant ceramic layer includes a plurality of first wear-resistant ceramic blocks, and the plurality of first wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the inner side surface of the front cover plate;

[0012] The second wear-resistant ceramic layer includes a plurality of second wear-resistant ceramic blocks, and the plurality of second wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the inner side surface of the rear cover plate;

[0013] The third wear-resistant ceramic layer includes a plurality of third wear-resistant ceramic blocks, and the plurality of third wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the outer side surface of the rear cover plate;

[0014] The fourth wear-resistant ceramic layer includes a plurality of fourth wear-resistant ceramic blocks, and a plurality of the fourth wear-resistant ceramic blocks are arranged at intervals on the working surface of each blade.

[0015] In the slurry pump impeller described in the embodiment of the present application, the plurality of first wear-resistant ceramic blocks include at least one of silicon carbide ceramic, silicon nitride bonded silicon carbide ceramic, silicon oxide ceramic bonded silicon carbide ceramic, and recrystallized ceramic.

[0016] In the slurry pump impeller described in the embodiment of the present application, a plurality of glue holes are respectively provided on the surfaces of the front cover plate and the rear cover plate.

[0017] In the slurry pump impeller described in the embodiment of the present application, the diameter of each of the glue holes ranges from 20 mm to 40 mm.

[0018] In the slurry pump impeller described in the embodiment of the present application, the soft connection layer is made of a flexible and wear-resistant material.

[0019] In the slurry pump impeller described in the embodiment of the present application, the flexible wear-resistant material is highly elastic and wear-resistant rubber.

[0020] In the slurry pump impeller described in the embodiment of the present application, a raised portion is provided in the middle of the rear cover plate, and a threaded hole for cooperating with the pump shaft of the slurry pump is provided at the center of the raised portion.

[0021] In the slurry pump impeller described in the embodiment of the present application, each of the blades is in the shape of a circular arc.

[0022] The slurry pump impeller provided in the embodiment of the present application is capable of improving the local wear resistance of the slurry pump impeller by providing a wear-resistant ceramic layer on the surface of the metal skeleton and utilizing the high hardness, wear resistance and corrosion resistance of the ceramic. By providing a soft connection layer (first soft connection layer) between the wear-resistant ceramic layer and the metal skeleton, and providing a soft connection layer (second soft connection layer) on the surface of the wear-resistant ceramic layer and the metal skeleton, utilizing the elasticity and impact absorption characteristics of the soft connection layer, the impact of solid particles on the wear-resistant ceramic layer can be reduced, thereby reducing the risk of the slurry pump impeller from breaking. In addition, the slurry pump impeller has a built-in metal skeleton, so the mechanical properties are stable. Therefore, the slurry pump impeller has better wear resistance, impact resistance and stability, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] FIG1 is a cross-sectional view of a slurry pump impeller provided in an embodiment of the present application.

[0025] FIG2 is a schematic diagram of the structure of the metal skeleton provided in an embodiment of the present application.

[0026] FIG3 is a structural schematic diagram of a slurry pump impeller from one perspective provided in an embodiment of the present application.

[0027] FIG4 is a structural schematic diagram of the slurry pump impeller provided in an embodiment of the present application from another perspective.

[0028] Description of Figure Numbers:

[0029] 10-wear-resistant ceramic layer 20-soft connection layer 30-front cover

[0030] 40- rear cover 50- blade 60- metal frame

[0031] 70- fluid suction port 80- first wear-resistant ceramic block 90- second wear-resistant ceramic block

[0032] 100-third wear-resistant ceramic block 110-fourth wear-resistant ceramic block 120-glue hole

[0033] 130-protrusion 140-threaded hole 1000-slurry pump impeller DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0037] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0039] 1 to 4 , the slurry pump impeller 1000 includes a wear-resistant ceramic layer 10 , a flexible connection layer 20 , and a metal skeleton 60 composed of a front cover plate 30 , a rear cover plate 40 , and a plurality of blades 50 .

[0040] The metal skeleton 60 can improve the stability of the mechanical performance of the slurry pump impeller 1000 .

[0041] The front cover plate 30 and the rear cover plate 40 are arranged opposite to each other, and a plurality of blades 50 are arranged between the front cover plate 30 and the rear cover plate 40 . The front cover plate 30 and the rear cover plate 40 are connected by the plurality of blades 50 .

[0042] The wear-resistant ceramic layer 10 is arranged on the surface of the metal skeleton 60, and the soft connection layer 20 includes a first soft connection layer (not shown in the figure) and a second soft connection layer (not shown in the figure). The first soft connection layer is arranged between the wear-resistant ceramic layer 10 and the metal skeleton 60, and the second soft connection layer is arranged on the surface of the wear-resistant ceramic layer 10 and the metal skeleton 60.

[0043] The soft connection layer 20 is formed on the surface of the wear-resistant ceramic layer 10 and the metal skeleton 60 and between the wear-resistant ceramic layer 10 and the metal skeleton 60 by using a vulcanization injection process, and plays a bonding and buffering role.

[0044] Among them, in order to prevent the wear-resistant ceramic layer 10 from moving when the soft connection layer 20 is injected, the wear-resistant ceramic layer 10 is pre-fixed on the metal skeleton 60 by an adhesive. After pre-fixation, the metal skeleton 60 and the wear-resistant ceramic layer 10 are placed in the mold as a whole, and the soft connection layer 20 is filled into the gap between the wear-resistant ceramic layer 10 and the metal skeleton 60 by injection.

[0045] Specifically, by providing a wear-resistant ceramic layer 10 on the surface of the metal skeleton 60, the high hardness, wear resistance, and corrosion resistance of the ceramic are utilized to improve the local wear resistance of the slurry pump impeller 1000. By providing a first soft connection layer between the wear-resistant ceramic layer 10 and the metal skeleton 60, and providing a second soft connection layer on the surfaces of the wear-resistant ceramic layer 10 and the metal skeleton 60, the elasticity and impact absorption properties of the first and second soft connection layers are utilized to reduce the impact of solid particles on the wear-resistant ceramic layer 10, thereby reducing the risk of fragmentation of the slurry pump impeller 1000.

[0046] A fluid suction port 70 is provided in the middle of the front cover plate 30 , wherein the fluid enters the slurry pump impeller through the fluid suction port 70 .

[0047] In some embodiments, the wear-resistant ceramic layer 10 includes a first wear-resistant ceramic layer, a second wear-resistant ceramic layer, a third wear-resistant ceramic layer and a fourth wear-resistant ceramic layer. The first wear-resistant ceramic layer is arranged on the inner surface of the front cover plate 30 facing the rear cover plate 40, the second wear-resistant ceramic layer is arranged on the inner surface of the rear cover plate 40 facing the front cover plate 30, the third wear-resistant ceramic layer is arranged on the outer surface of the rear cover plate 40 facing the front cover plate 30, and the fourth wear-resistant ceramic layer is arranged on the working surface of each blade 50.

[0048] Among them, the wear-resistant ceramic layer 10 is arranged in the area of ​​the slurry pump impeller 1000 that is prone to wear (the inner surface of the front cover plate 30 facing the rear cover plate 40, the inner surface of the rear cover plate 40 facing the front cover plate 30, the outer surface of the rear cover plate 40 facing the front cover plate 30 and the working surface of the blade 50) based on usage experience.

[0049] In some embodiments, the first wear-resistant ceramic layer includes a plurality of first wear-resistant ceramic blocks 80, and the plurality of first wear-resistant ceramic blocks 80 are spaced apart along the circumferential direction of the inner surface of the front cover plate 30; the second wear-resistant ceramic layer includes a plurality of second wear-resistant ceramic blocks 90, and the plurality of second wear-resistant ceramic blocks 90 are spaced apart along the circumferential direction of the inner surface of the rear cover plate 40; the third wear-resistant ceramic layer includes a plurality of third wear-resistant ceramic blocks 100, and the plurality of third wear-resistant ceramic blocks 100 are spaced apart along the circumferential direction of the outer surface of the rear cover plate 40; the fourth wear-resistant ceramic layer includes a plurality of fourth wear-resistant ceramic blocks 110, and a plurality of fourth wear-resistant ceramic blocks 110 are spaced apart on the working surface of each blade 50.

[0050] The first, second, and third wear-resistant ceramic layers are divided into small ceramic blocks along the circumference of the front and rear cover plates 30 and 40, based on the diameter of the slurry pump impeller 1000 and the ceramic molding process. Furthermore, the fourth wear-resistant ceramic layer is divided into small blocks spaced apart on the blades 50. This design addresses the difficulty of scaling up wear-resistant ceramics. Furthermore, dividing the first, second, third, and fourth wear-resistant ceramic layers into small blocks can reduce the cost of the slurry pump impeller 1000.

[0051] Among them, the number of the first wear-resistant ceramic block 80, the second wear-resistant ceramic block 90, the third wear-resistant ceramic block 100 and the fourth wear-resistant ceramic block 110 can be the same or different. Those skilled in the art can set it according to actual conditions and no specific limitation is made here.

[0052] In some embodiments, the plurality of first wear-resistant ceramic blocks 80 include at least one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic.

[0053] For example, the plurality of first wear-resistant ceramic blocks 80 may all be silicon carbide ceramic, or a portion of the plurality of first wear-resistant ceramic blocks 80 may be silicon carbide ceramic, while the remaining portion may be silicon nitride-bonded silicon carbide ceramic. In other words, the plurality of first wear-resistant ceramic blocks 80 may be composed of any one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic, either alone or in combination.

[0054] In some embodiments, the plurality of second wear-resistant ceramic blocks 90 include at least one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic.

[0055] For example, the plurality of second wear-resistant ceramic blocks 90 may all be silicon carbide ceramic, or a portion of the plurality of second wear-resistant ceramic blocks 80 may be silicon carbide ceramic, while the remaining portion may be silicon nitride-bonded silicon carbide ceramic. In other words, the plurality of second wear-resistant ceramic blocks 90 may be composed of any one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic, either alone or in combination.

[0056] In some embodiments, the plurality of third wear-resistant ceramic blocks 100 include at least one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic.

[0057] For example, the plurality of third wear-resistant ceramic blocks 100 are all silicon carbide ceramics, or a portion of the plurality of third wear-resistant ceramic blocks 80 are silicon carbide ceramics, and the remaining portions are silicon nitride-bonded silicon carbide ceramics. In other words, the plurality of third wear-resistant ceramic blocks 100 can be composed of any one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide-bonded silicon carbide ceramics, and recrystallized ceramics, either alone or in combination.

[0058] In some embodiments, the plurality of fourth wear-resistant ceramic blocks 110 include at least one of silicon carbide ceramic, silicon nitride-bonded silicon carbide ceramic, silicon oxide-bonded silicon carbide ceramic, and recrystallized ceramic.

[0059] For example, the plurality of fourth wear-resistant ceramic blocks 110 are all silicon carbide ceramics, or a portion of the plurality of fourth wear-resistant ceramic blocks 110 are silicon carbide ceramics, and the remaining portion are silicon nitride-bonded silicon carbide ceramics. In other words, the plurality of fourth wear-resistant ceramic blocks 110 can be composed of any one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide-bonded silicon carbide ceramics, and recrystallized ceramics, either alone or in combination.

[0060] In some embodiments, a plurality of adhesive holes 120 are respectively provided on the surfaces of the front cover 30 and the rear cover 40 .

[0061] The first soft connection layer is formed by injecting the flexible wear-resistant material into the gap between the wear-resistant ceramic layer 10 and the metal skeleton 60 through the glue holes 120. The multiple glue holes 120 facilitate injection of the first soft connection layer and help make the first soft connection layer uniform.

[0062] Among them, those skilled in the art can set the number of the glue holes 120 according to actual conditions, and no specific limitation is made here.

[0063] In some embodiments, the diameter of each via hole ranges from 20 mm to 40 mm.

[0064] In some embodiments, the soft connection layer is made of a flexible and wear-resistant material.

[0065] In some embodiments, the flexible wear-resistant material is highly elastic wear-resistant rubber.

[0066] In some embodiments, a raised portion 130 is provided in the middle of the rear cover plate 40 , and a threaded hole 140 for coupling with a pump shaft of a slurry pump is provided at the center of the raised portion 130 .

[0067] In some embodiments, each blade 50 is in the shape of an arc.

[0068] In summary, the slurry pump impeller 1000 provided in the embodiment of the present application, by providing a wear-resistant ceramic layer 10 on the surface of the metal skeleton 60, utilizes the high hardness, wear resistance and corrosion resistance of the ceramic, thereby being able to improve the local wear resistance of the slurry pump impeller 1000. By providing a soft connection layer (first soft connection layer) between the wear-resistant ceramic layer 10 and the metal skeleton 60, and providing a soft connection layer (second soft connection layer) on the surface of the wear-resistant ceramic layer 10 and the metal skeleton 60, utilizing the elasticity and impact absorption characteristics of the soft connection layer, it is possible to reduce the impact of solid particles on the wear-resistant ceramic layer, thereby reducing the risk of fragmentation of the slurry pump impeller 1000. In addition, the slurry pump impeller 1000 has a built-in metal skeleton 60, so the mechanical properties are stable. Therefore, the slurry pump impeller 1000 has better wear resistance, impact resistance and stability, and a long service life.

[0069] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The above is a detailed introduction to a slurry pump impeller provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A slurry pump impeller, characterized in that: It includes a wear-resistant ceramic layer, a soft connection layer, and a metal frame consisting of a front cover plate, a rear cover plate, and a plurality of blades; The front cover plate is arranged opposite to the rear cover plate, a plurality of blades are arranged between the front cover plate and the rear cover plate, and the front cover plate and the rear cover plate are connected through the plurality of blades; The wear-resistant ceramic layer is arranged on the surface of the metal skeleton, the soft connection layer includes a first soft connection layer and a second soft connection layer, the first soft connection layer is arranged between the wear-resistant ceramic layer and the metal skeleton, and the second soft connection layer is arranged on the surface of the wear-resistant ceramic layer and the metal skeleton; A fluid suction port is arranged in the middle of the front cover plate.

2. The slurry pump impeller according to claim 1, characterized in that: The wear-resistant ceramic layer includes a first wear-resistant ceramic layer, a second wear-resistant ceramic layer, a third wear-resistant ceramic layer and a fourth wear-resistant ceramic layer; The first wear-resistant ceramic layer is arranged on the inner surface of the front cover plate facing the rear cover plate, the second wear-resistant ceramic layer is arranged on the inner surface of the rear cover plate facing the front cover plate, the third wear-resistant ceramic layer is arranged on the outer surface of the rear cover plate facing the front cover plate, and the fourth wear-resistant ceramic layer is arranged on the working surface of each of the blades.

3. The slurry pump impeller according to claim 2, characterized in that: The first wear-resistant ceramic layer includes a plurality of first wear-resistant ceramic blocks, and the plurality of first wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the inner side surface of the front cover plate; The second wear-resistant ceramic layer includes a plurality of second wear-resistant ceramic blocks, and the plurality of second wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the inner side surface of the rear cover plate; The third wear-resistant ceramic layer includes a plurality of third wear-resistant ceramic blocks, and the plurality of third wear-resistant ceramic blocks are arranged at intervals along the circumferential direction of the outer side surface of the rear cover plate; The fourth wear-resistant ceramic layer includes a plurality of fourth wear-resistant ceramic blocks, and a plurality of the fourth wear-resistant ceramic blocks are arranged at intervals on the working surface of each blade.

4. The slurry pump impeller according to claim 3, characterized in that: The plurality of first wear-resistant ceramic blocks include at least one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide ceramics-bonded silicon carbide ceramics, and recrystallized ceramics.

5. The slurry pump impeller according to claim 1, characterized in that: A plurality of glue holes are respectively arranged on the surfaces of the front cover plate and the rear cover plate.

6. The slurry pump impeller according to claim 5, characterized in that: The diameter of each of the glue holes ranges from 20 mm to 40 mm.

7. The slurry pump impeller according to claim 1, characterized in that: The soft connection layer is made of flexible and wear-resistant material.

8. The slurry pump impeller according to claim 7, characterized in that: The flexible wear-resistant material is highly elastic wear-resistant rubber.

9. The slurry pump impeller according to claim 1, characterized in that: A raised portion is arranged in the middle of the rear cover plate, and a threaded hole for matching and connecting with the pump shaft of the slurry pump is arranged at the center of the raised portion.

10. The slurry pump impeller according to claim 1, characterized in that: Each of the blades is in the shape of an arc.

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