Wear-resistant ceramic pump body

Abstract

The utility model discloses a kind of wear-resistant ceramic pump bodies, including shell, ceramic lining and the first bonding layer for filling binder between shell and ceramic lining, the shell is equipped with and the cooperation hole of guard plate cooperation;The first bonding layer is equipped with wear-resistant ceramic piece near cooperation hole;The wear-resistant ceramic piece is annular, is spliced into by at least three ceramic sub-pieces, the surface of the ceramic sub-piece towards cooperation hole and the surface of the corresponding part of guard plate are adapted to each other.The utility model can greatly improve the wear resistance of the first bonding layer near cooperation hole by setting wear-resistant ceramic piece.In addition, wear-resistant ceramic piece is annular, is spliced into by at least three ceramic sub-pieces, can be under the premise that wear-resistant ceramic piece is not machined (i.e. Cost reduction in the process of pump body manufacturing), so that the radial inner surface of wear-resistant ceramic piece and the axial surface of corresponding guard plate are more consistent.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal pumps, and in particular to a wear-resistant ceramic pump body. Background Technology

[0002] Slurry pumps are used to transport liquids containing solid particles. Due to the scouring effect of solid particles, the flow parts wear out severely. To improve their service life, the flow parts are often made of wear-resistant materials, such as wear-resistant alloys, wear-resistant rubber, and wear-resistant ceramics. Among them, wear-resistant ceramics have the best wear resistance.

[0003] Slurry pumps made of wear-resistant ceramics have flow-through components including the pump body, impeller, and liner plates. The pump body and liner plates are sealed using a hole and shaft fit. Typically, the hole is located on the pump body, and the shaft is mounted on the front or rear liner plate. A sealing ring is placed on the outside of the mating shaft and hole to achieve a seal. To ensure sealing effectiveness and reliability, the dimensions of the mating shaft and hole must meet certain precision requirements to prevent wear on the sealing ring. A common method is to machine the shaft or hole to achieve the designed dimensional accuracy.

[0004] Slurry pumps made of wear-resistant ceramics have flow-through components including the pump body, impeller, and liner plates. The pump body and liner plates are sealed using a hole and shaft fit. Typically, the hole is located on the pump body, and the shaft is mounted on the front or rear liner plate. A sealing ring is placed on the outside of the mating shaft and hole to achieve a seal. To ensure sealing effectiveness and reliability, the dimensions of the mating shaft and hole must meet certain precision requirements to prevent wear on the sealing ring. A common method is to machine the shaft or hole to achieve the designed dimensional accuracy.

[0005] However, due to the extremely high hardness of ceramics, processing is very difficult, resulting in high costs. To solve this problem, CN211343486U discloses a ceramic pump body. This technical solution involves sintering holes on the ceramic pump body to a size larger than the theoretical size, then applying a composite wear-resistant material to the inner surface and axial outer side of the hole to eliminate the need for machining, and finally applying a seal to the outer side of the composite wear-resistant material to achieve a seal. This solution can meet the requirements for lifespan and reliability in most application scenarios, and the cost is significantly lower than that of machining methods. However, under conditions of severe abrasion, due to the insufficient wear resistance of the composite wear-resistant material, the composite wear-resistant material on the surface of the pump body mating hole is easily worn, further wearing down the composite wear-resistant material on the axial outer side of the hole, leading to damage to the outer sealing ring, and ultimately causing the slurry to erode the metal parts of the pump body or the protective plate, causing damage.

[0006] Therefore, existing technologies cannot simultaneously meet the requirements of reducing costs and increasing service life during the manufacturing process of pump bodies under conditions of strong abrasion. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wear-resistant ceramic pump body that can simultaneously meet the requirements of reducing costs and increasing service life during the pump body manufacturing process under strong abrasive conditions.

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: A wear-resistant ceramic pump body includes a housing, a ceramic liner, and a first bonding layer for filling a binder between the housing and the ceramic liner, wherein the housing is provided with mating holes that mate with a protective plate. The first bonding layer is provided with a wear-resistant ceramic component near the mating hole; The wear-resistant ceramic part is ring-shaped and is composed of at least three ceramic sub-parts. The surface of the ceramic sub-parts facing the mating hole is adapted to the surface of the corresponding part of the guard plate.

[0009] In this technical solution, by setting wear-resistant ceramic components, the wear resistance of the first bonding layer near the mating hole can be greatly improved. Furthermore, the wear-resistant ceramic component is annular and composed of at least three ceramic sub-components. The surface of the ceramic sub-component facing the mating hole is adapted to the surface of the corresponding part of the guard plate. This allows for a higher degree of fit between the radial inner surface of the wear-resistant ceramic component and the axial surface of the corresponding guard plate without requiring machining of the wear-resistant ceramic component (i.e., reducing costs during pump body manufacturing).

[0010] Furthermore, the wear-resistant ceramic component is located between the outer shell and the ceramic liner, and is connected to the outer shell and the ceramic liner respectively through the first bonding layer. The wear-resistant ceramic component, the outer shell, the first bonding layer, and the ceramic liner form a whole, thereby preventing the wear-resistant ceramic component from falling off and improving the reliability of the wear-resistant ceramic pump body.

[0011] Furthermore, the side of the wear-resistant ceramic part that connects to the first bonding layer is provided with a stress-bearing connection groove; The width of the bottom of the stress-bearing connection groove is greater than the width of the groove opening.

[0012] This technical solution improves the structure of the wear-resistant ceramic parts, thereby enhancing the bond strength between the wear-resistant ceramic parts and the first bonding layer.

[0013] Furthermore, the ceramic liner has a second bonding layer on the side facing the mating hole, which allows it to be fitted with a protective plate without machining the ceramic liner.

[0014] Furthermore, the wear-resistant ceramic component has a third bonding layer on the side facing the mating hole, which can reduce the dimensional accuracy of the ceramic sub-components involved in assembling the wear-resistant ceramic component, thereby reducing the manufacturing cost of the wear-resistant ceramic pump body while meeting the requirements of wear resistance.

[0015] Furthermore, the thickness of the second bonding layer is greater than that of the third bonding layer, which makes the third bonding layer less susceptible to wear, thereby increasing the lifespan of the sealing ring.

[0016] Furthermore, the outer casing is provided with a limiting groove; The wear-resistant ceramic part is provided with a limiting part; The limiting part is embedded in the limiting groove, and the limiting groove limits the wear-resistant ceramic part in the horizontal direction.

[0017] This technical solution, through the cooperation of the limiting groove of the outer shell and the limiting part of the wear-resistant ceramic part, is conducive to the positioning and fixing of the wear-resistant ceramic part during the manufacturing of the pump body. At the same time, it is also conducive to the wear-resistant ceramic part not falling off due to pressure when the sealing ring is installed on its surface.

[0018] Furthermore, the outer surface of the wear-resistant ceramic part away from the mating hole is provided with multiple clamping parts between the limiting groove and the outer surface of the wear-resistant ceramic part away from the mating hole, for pushing the corresponding ceramic sub-parts to move toward the axis.

[0019] In this technical solution, the wear-resistant ceramic part can be positioned by a clamping component during casting, so that the wear-resistant ceramic part can be tightly attached to the molding mold, and the third bonding layer formed after casting has a smaller thickness, which makes the third bonding layer less susceptible to wear, thereby improving the life of the sealing ring.

[0020] Furthermore, the binder contains wear-resistant particles, which can be made of silicon carbide, alumina, etc., to enhance the overall strength of the wear-resistant ceramic pump body while ensuring the adhesiveness of the binder.

[0021] Furthermore, the distance between the wear-resistant ceramic part and the ceramic liner is 1-10mm.

[0022] Compared with existing technologies, the principles and advantages of this technical solution are as follows: 1. By incorporating wear-resistant ceramic components, the wear resistance of the first bonding layer near the mating hole can be significantly improved. Furthermore, the wear-resistant ceramic component is annular and composed of at least three ceramic sub-components, allowing for a higher degree of fit between the radial inner surface of the wear-resistant ceramic component and the corresponding axial surface of the protective plate without requiring machining of the wear-resistant ceramic component (i.e., reducing costs during pump body manufacturing).

[0023] 2. The wear-resistant ceramic component is located between the outer shell and the ceramic liner, and is connected to the outer shell and the ceramic liner respectively through the first bonding layer. The wear-resistant ceramic component, the outer shell, the first bonding layer, and the ceramic liner form a whole, which can prevent the wear-resistant ceramic component from falling off and improve the reliability of the wear-resistant ceramic pump body.

[0024] 3. A stress-bearing connection groove is provided on the side of the wear-resistant ceramic part that is connected to the first bonding layer. The width of the bottom of the stress-bearing connection groove is greater than the width of the groove opening. By improving the structure of the wear-resistant ceramic part, the firmness of the connection between the wear-resistant ceramic part and the first bonding layer can be further improved.

[0025] 4. The ceramic liner has a second bonding layer on the side facing the mating hole, which allows it to be fitted with a protective plate without machining the ceramic liner.

[0026] 5. A third bonding layer is provided on the side of the wear-resistant ceramic part facing the mating hole, which can reduce the dimensional accuracy of the ceramic sub-parts involved in assembling the wear-resistant ceramic part, thereby reducing the manufacturing cost of the wear-resistant ceramic pump body while meeting the requirements of wear resistance.

[0027] 6. The matching of the limiting groove of the outer shell and the limiting part of the wear-resistant ceramic part is beneficial to the positioning and fixing of the wear-resistant ceramic part during the manufacturing of the pump body. At the same time, it is also beneficial to prevent the wear-resistant ceramic part from falling off due to pressure when the sealing ring is installed on its surface.

[0028] 7. During casting, clamping components can be used to position the wear-resistant ceramic parts, allowing them to fit tightly against the mold. This results in a thinner third bonding layer after casting, making it less susceptible to wear and thus extending the lifespan of the sealing ring.

[0029] 8. A distance of 1-10mm between the wear-resistant ceramic part and the ceramic liner is more suitable. If the distance is too small, the axial dimensions of the wear-resistant ceramic part and the ceramic liner need to be more precise to ensure that they do not interfere with each other during assembly, thereby increasing the manufacturing cost. Conversely, the first bonding layer located between the wear-resistant ceramic part and the ceramic liner is easily worn, causing the wear-resistant ceramic part to easily fall off the first bonding layer. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the services required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of the wear-resistant ceramic pump body described in Embodiment 1 of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a cross-sectional view of the ceramic component in Embodiment 1 of this utility model; Figure 4 This is a perspective view of the ceramic component of Embodiment 1 of this utility model; Figure 5 This is a cross-sectional view of the wear-resistant ceramic pump body and the protective plate after assembly according to Embodiment 1 of this utility model; Figure 6 for Figure 5 A partial view at point B in the middle; Figure 7 This is a cross-sectional view of the wear-resistant ceramic pump body in Embodiment 2 of this utility model; Figure 8 for Figure 7 A partial view at point D; Figure 9 This is a cross-sectional view of the ceramic component in Embodiment 2 of this utility model; Figure 10 This is a perspective view of the ceramic component in Embodiment 2 of this utility model; Figure label: 1. Outer shell, 2. Ceramic inner liner, 3. First bonding layer, 4. Protective plate, 5. Mating hole, 6. Wear-resistant ceramic part, 7. Ceramic sub-part, 8. Force-bearing connection groove, 9. Second bonding layer, 10. Third bonding layer, 11. Limiting groove, 12. Limiting part, 14. Sealing ring. Detailed Implementation

[0032] The present invention will be further described below with reference to two specific embodiments: Example 1

[0033] like Figures 1 to 8 As shown in the figure, the wear-resistant ceramic pump body described in this embodiment includes a shell 1, a ceramic liner 2, and a first bonding layer 3 located between the shell 1 and the ceramic liner for filling with a binder (the binder contains wear-resistant particles). The shell 1 is provided with a mating hole 5 that mates with a protective plate 4. The first bonding layer 3 is provided with a wear-resistant ceramic part 6 near the mating hole 5. The wear-resistant ceramic part 6 is annular and is composed of six ceramic sub-parts 7. The surfaces of the six ceramic sub-parts 7 facing the mating hole are adapted to the surfaces of the corresponding parts of the protective plate 4.

[0034] By incorporating wear-resistant ceramic components 6, the wear resistance of the first bonding layer 3 near the mating hole 5 can be significantly improved. Furthermore, the wear-resistant ceramic component 6 is annular, composed of six ceramic sub-components 7, which allows for a higher degree of fit between the radial inner surface of the wear-resistant ceramic component 6 and the corresponding axial surface of the guard plate 4 without requiring machining of the component 6 (i.e., reducing costs during pump body manufacturing). Wear-resistant particles are incorporated into the binder, enhancing the overall strength of the wear-resistant ceramic pump body while maintaining binder viscosity.

[0035] Specifically, in this embodiment, the wear-resistant ceramic part 6 is located between the outer shell 1 and the ceramic inner liner 2, and is connected to the outer shell 1 and the ceramic inner liner 2 respectively through the first bonding layer 3. The wear-resistant ceramic part 6, the outer shell 1, the first bonding layer 3, and the ceramic inner liner 2 form a whole, thereby preventing the wear-resistant ceramic part 6 from falling off and improving the reliability of the wear-resistant ceramic pump body.

[0036] The distance between the wear-resistant ceramic part 6 and the ceramic inner liner 2 is 5mm. This ensures that the wear-resistant ceramic part 6 and the ceramic inner liner 2 do not interfere with each other during assembly, and also prevents the wear-resistant ceramic part 6 from falling off due to the easy wear of the bonding agent between the wear-resistant ceramic part 6 and the ceramic inner liner 2.

[0037] Specifically, in this embodiment, the side of the wear-resistant ceramic part 6 connected to the first bonding layer 3 is provided with a stress-bearing connection groove 8; the width b2 of the bottom of the stress-bearing connection groove 8 is greater than the width b1 of the groove opening. By improving the structure of the wear-resistant ceramic part 6, the firmness of the connection between the wear-resistant ceramic part 6 and the first bonding layer 3 is further improved.

[0038] Specifically, in this embodiment, the ceramic liner 2 has a second bonding layer 9 on the side facing the mating hole 5, allowing it to be fitted with the protective plate 4 without machining the ceramic liner 2. The wear-resistant ceramic part 6 has a third bonding layer 10 on the side facing the mating hole 5, which can reduce the dimensional accuracy of the ceramic sub-parts 7 involved in assembling the wear-resistant ceramic part 6, thereby reducing the manufacturing cost of the wear-resistant ceramic pump body while meeting wear resistance requirements. The thickness of the second bonding layer 9 is greater than the thickness of the third bonding layer 10, making the third bonding layer 10 less prone to wear, thereby increasing the lifespan of the sealing ring 14.

[0039] Obviously, in this embodiment, the first bonding layer 3 can be made of one material or can contain multiple materials to improve its performance or reduce its cost.

[0040] Specifically, in this embodiment, the distance between the wear-resistant ceramic part 6 and the ceramic liner 2 is 5mm, which is a suitable distance. If the distance is too small, the axial dimensions of the wear-resistant ceramic part 6 and the ceramic liner 2 need to be more precise to ensure that they do not interfere with each other during assembly, thereby increasing the manufacturing cost. Conversely, the first bonding layer 3 located between the wear-resistant ceramic part 6 and the ceramic liner 2 is easily worn, causing the wear-resistant ceramic part 6 to easily fall off the first bonding layer 3. Example 2

[0041] like Figures 7 to 10 As shown, the main difference between this embodiment and Embodiment 1 is that: In this embodiment, the mating hole 5 is a stepped conical hole, and the wear-resistant ceramic part 6 is composed of 24 ceramic sub-parts 7.

[0042] Next, the outer shell 1 is provided with a limiting groove 11; the wear-resistant ceramic part 6 is provided with a limiting part 12; the limiting part 12 is embedded in the limiting groove 11, and the wear-resistant ceramic part 6 is horizontally limited by the limiting groove 11. In this embodiment, the limiting groove 11 of the outer shell 1 and the limiting part 12 of the wear-resistant ceramic part 6 cooperate to facilitate the positioning and fixing of the wear-resistant ceramic part 6 during the manufacturing of the pump body. At the same time, it also helps to prevent the wear-resistant ceramic part 6 from falling off due to pressure when the sealing ring 14 is installed on its surface.

[0043] In addition, in this embodiment, a plurality of clamping parts are provided between the outer surface of the wear-resistant ceramic part 6 away from the mating hole 5 and the limiting groove 11 for pushing the corresponding ceramic sub-part 7 to move toward the axis. The clamping parts can be used to position the wear-resistant ceramic part 6 during casting, so that the wear-resistant ceramic part 6 can be tightly attached to the molding mold, so that the third bonding layer 10 formed after casting has a smaller thickness, making the third bonding layer 10 less susceptible to wear, thereby improving the life of the sealing ring 14.

[0044] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A wear-resistant ceramic pump body, comprising a housing, a ceramic liner, and a first bonding layer for filling a binder between the housing and the ceramic liner, characterized in that, The outer casing is provided with mating holes that mate with the protective plate; The first bonding layer is provided with a wear-resistant ceramic component near the mating hole; The wear-resistant ceramic component is ring-shaped and is composed of at least three ceramic sub-components.

2. The wear-resistant ceramic pump body according to claim 1, characterized in that, The surface of the ceramic component facing the mating hole is adapted to the surface of the corresponding part of the protective plate.

3. The wear-resistant ceramic pump body according to claim 1, characterized in that, The wear-resistant ceramic component is located between the outer shell and the ceramic liner, and is connected to the outer shell and the ceramic liner respectively through the first bonding layer. The wear-resistant ceramic component, the outer shell, the first bonding layer, and the ceramic liner form a whole.

4. The wear-resistant ceramic pump body according to claim 1, characterized in that, The side of the wear-resistant ceramic part that connects to the first bonding layer is provided with a stress-bearing connection groove. The width of the bottom of the stress-bearing connection groove is greater than the width of the groove opening.

5. The wear-resistant ceramic pump body according to claim 1, characterized in that, The ceramic liner has a second bonding layer on the side facing the mating hole.

6. The wear-resistant ceramic pump body according to claim 5, characterized in that, The wear-resistant ceramic part has a third bonding layer on the side facing the mating hole.

7. A wear-resistant ceramic pump body according to claim 6, characterized in that, The thickness of the second bonding layer is greater than the thickness of the third bonding layer.

8. A wear-resistant ceramic pump body according to any one of claims 1-7, characterized in that, The outer casing is provided with a limiting groove; The wear-resistant ceramic part is provided with a limiting part; The limiting part is embedded in the limiting groove, and the limiting groove limits the wear-resistant ceramic part in the horizontal direction.

9. A wear-resistant ceramic pump body according to claim 8, characterized in that, The wear-resistant ceramic part has multiple clamping parts between its outer surface away from the mating hole and the limiting groove, which are used to push the corresponding ceramic sub-parts to move toward the axis.

10. A wear-resistant ceramic pump body according to any one of claims 1-7, characterized in that, The distance between the wear-resistant ceramic part and the ceramic liner is 1-10mm.

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