Small and medium-sized ceramic pump impeller

Abstract

The utility model relates to the technical field of ceramic pump impellers, and provides a small and medium-sized ceramic pump impeller which comprises a hub, a supporting plate, a ceramic cover plate and ceramic blades, the supporting plate is arranged on the hub, the supporting plate and the hub jointly form a framework, a special-shaped flowing hole is formed in the supporting plate, and the width of the special-shaped flowing hole is gradually increased from inside to outside in the radial direction of the supporting plate. And the ceramic cover plate and the ceramic blades are integrally cast on the framework. By means of the technical scheme, the problems that in the prior art, ceramic materials cannot penetrate through a traditional flowing hole easily, and production efficiency and quality are affected easily are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic pump impellers, specifically to medium and small-sized ceramic pump impellers. Background Art

[0002] Ceramic impellers have good wear resistance and corrosion resistance. When transporting abrasive media, the service life of the impeller can be effectively extended. In the production and manufacturing of medium and small-sized ceramic pump impellers, methods such as spraying ceramic coatings or casting ceramic materials are mostly used. When using the casting method, a plurality of flow holes need to be opened on the ceramic pump impeller skeleton to ensure the flow of ceramic materials, and the flow holes mostly adopt circular designs.

[0003] This design has obvious drawbacks. On the one hand, when the number of round holes is large and the area is small, although it may meet certain specific flow requirements to a certain extent, the large number increases the production difficulty, and the small area of the round holes results in poor flow performance. When casting, it is difficult for ceramic materials to smoothly pass through these small holes, thereby affecting production efficiency and quality. On the other hand, if the number of round holes is reduced and the area of the round holes is increased to improve the casting efficiency, although it is beneficial to the flow of ceramic materials to a certain extent, the strength of the skeleton will be greatly reduced, which makes the impeller unable to withstand the required pressure and stress during operation, thus affecting the overall performance and service life of the ceramic pump impeller and reducing production quality.

[0004] In summary, in view of the above problems, the existing technology has not solved them well, bringing troubles to the normal operation of this field. Therefore, there is an urgent need for a medium and small-sized ceramic pump impeller to solve the above problems. Content of the Utility Model

[0005] The utility model provides a medium and small-sized ceramic pump impeller, which solves the problem in related technologies that traditional flow holes are not conducive to the passage of ceramic materials and easily affect production efficiency and quality.

[0006] The technical solution of the utility model is as follows: A medium and small-sized ceramic pump impeller, including a hub, a support plate, a ceramic cover plate and ceramic blades. The support plate is arranged on the hub, and the support plate and the hub jointly form a skeleton. The support plate has special-shaped flow holes, and the width of the special-shaped flow holes gradually increases from the inside to the outside along the radial direction of the support plate. The ceramic cover plate and the ceramic blades are integrally cast on the skeleton.

[0007] Optionally, the special-shaped flow hole is trapezoidal, and the corner of the special-shaped flow hole is in arc transition.

[0008] Optionally, there are a plurality of special-shaped flow holes, which are evenly distributed along the circumferential direction of the support plate.

[0009] Optionally, the hub has threads for threaded connection with the transmission shaft of the pump.

[0010] Optionally, the support plate and the hub are connected by welding.

[0011] Optionally, the support plate and the hub are integrally formed.

[0012] Optionally, it further includes a baffle plate provided at the end of the hub.

[0013] Optionally, the support plate also has circular flow holes.

[0014] Optionally, there are multiple circular flow holes.

[0015] Optionally, the multiple circular flow holes are evenly distributed along the circumferential direction of the support plate.

[0016] The working principle and beneficial effects of the present utility model are as follows:

[0017] When manufacturing the impeller of a medium and small-sized ceramic pump, first, the special-shaped support plate is installed on the metal hub to form a strong skeleton structure. Special-shaped flow holes are opened on the support plate. These special-shaped flow holes are of a special shape, similar to an isosceles trapezoid, and their width gradually increases from the inside to the outside along the radial direction of the support plate. Such a design can provide a larger space for the flow of ceramic materials while ensuring the strength of the support plate. Then, by means of casting, the ceramic materials are integrally cast on the skeleton to form a ceramic cover plate and ceramic blades, where the ceramic cover plate includes a front cover plate and a rear cover plate. During the casting process, the ceramic materials can fully fill each part of the skeleton and be tightly combined with the skeleton. Due to the special shape and large area of the special-shaped flow holes, the ceramic materials can flow smoothly, ensuring the uniformity and integrity of the casting. At the same time, the ceramic cover plate and ceramic blades are integrally formed on the skeleton by casting, and the bonding degree between the ceramic materials and the skeleton is very high, improving the overall strength and performance of the impeller.

[0018] This solution has significant beneficial effects. First of all, the skeleton formed by the hub and the support plate greatly improves the overall strength of the impeller, which can withstand various pressures and stresses generated during the operation of the pump, ensuring the stability and reliability of the impeller. Secondly, the unique design of the special-shaped flow holes is more in line with the shape of the impeller, and the opening of the holes will not have a great impact on the strength of the support plate. Moreover, since its width gradually increases from the inside to the outside along the radial direction of the support plate, it can be designed with a larger area, which makes the fluidity of the ceramic materials better. During casting, the ceramic materials can flow more smoothly through the special-shaped flow holes, improving the production efficiency and production quality. At the same time, the larger area of the special-shaped flow holes can also reduce the number of holes, further reducing the production difficulty.

[0019] The overall manufacturing process of the impeller of a medium and small-sized ceramic pump is as follows:

[0020] S1: Conduct 3D modeling design and strength analysis on the special-shaped support plate and metal hub in industrial software, then conduct overall 3D design and strength analysis after covering the ceramic layer, and analyze different working conditions through simulation calculation to ensure the overall structural strength of the ceramic impeller and the stress analysis of the impeller during the operation of the pump and meet the operation requirements;

[0021] S2: Select the optimal combination scheme of the skeleton and the covered ceramic layer through simulation calculation and analysis, and cast on the support plate and the hub, and integrally cast the ceramic cover plate and the ceramic blades;

[0022] S3: When designing the structure, there is no need to design the front and back blades of the traditional metal impeller, which can reduce the erosion of the front guard plate and the rear guard plate respectively installed in front of and behind the impeller. At the same time, the flow channel is appropriately widened, and the outlet angle of the blade is appropriately increased to ensure that after the impeller blade is thickened, the hydraulic performance of the ceramic impeller is consistent with that of the metal impeller;

[0023] S4: The rear cover plate of the ceramic impeller is specially thickened, preferably 1.3 - 1.8 times the thickness of the traditional metal rear cover plate, to ensure the firmness after casting the skeleton inside and meet the strength requirements for the impeller to rotate and do work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present invention in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0025] Figure 1 It is a schematic structural diagram of the skeleton in the present invention;

[0026] Figure 2 It is an external shape schematic diagram of the skeleton in the present invention;

[0027] Figure 3 It is a schematic structural diagram of the impeller of a medium and small ceramic pump.

[0028] In the figure: 1, hub; 2, support plate; 3, ceramic cover plate; 4, ceramic blade; 5, skeleton; 6, special-shaped flow hole; 7, thread; 8, baffle; 9, circular flow hole; 10, front cover plate; 11, rear cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation manners of the present invention will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can also be obtained.

[0030] To simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to simplify the drawings for easy understanding, for components with the same structure or function in some figures, only one of them is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0031] In this article, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] Referring to Figures 1 to 3 , for the first embodiment of the present utility model, a medium and small ceramic pump impeller is proposed, which includes a hub 1, a support plate 2, a ceramic cover plate 3, and ceramic blades 4. The support plate 2 is provided on the hub 1. The support plate 2 and the hub 1 together form a framework 5. The support plate 2 has a special-shaped flow hole 6, and the width of the special-shaped flow hole 6 gradually increases from the inside to the outside along the radial direction of the support plate 2. The ceramic cover plate 3 and the ceramic blades 4 are integrally cast on the framework 5.

[0034] In this embodiment, when manufacturing the impeller of a medium and small-sized ceramic pump, first, the special-shaped support plate 2 is installed on the metal hub 1 to form a firm skeleton 5 structure. Special-shaped flow holes 6 are opened on the support plate 2. The shapes of these special-shaped flow holes 6 are special, similar to isosceles trapezoids, and their widths gradually increase from the inside to the outside along the radial direction of the support plate 2. Such a design can provide a larger space for the flow of ceramic materials while ensuring the strength of the support plate 2. Then, by means of casting, the ceramic materials are integrally cast on the skeleton 5 to form a ceramic cover plate 3 and ceramic blades 4, where the ceramic cover plate 3 includes a front cover plate 10 and a rear cover plate 11. During the casting process, the ceramic materials can fully fill each part of the skeleton 5 and be tightly combined with the skeleton 5. Due to the special shape and large area of the special-shaped flow holes 6, the ceramic materials can flow smoothly, ensuring the uniformity and integrity of the casting. At the same time, the ceramic cover plate 3 and the ceramic blades 4 are integrally formed on the skeleton 5 by casting, and the bonding degree between the ceramic materials and the skeleton 5 is very high, improving the overall strength and performance of the impeller.

[0035] This solution has significant beneficial effects. First of all, the skeleton 5 jointly formed by the hub 1 and the support plate 2 greatly improves the overall strength of the impeller, can withstand various pressures and stresses generated during the operation of the pump, and ensures the stability and reliability of the impeller. Secondly, the unique design of the special-shaped flow holes 6 is more in line with the shape of the impeller, and the opening of the holes will not have a great impact on the strength of the support plate 2. Moreover, since its width gradually increases from the inside to the outside along the radial direction of the support plate 2, it can be designed to have a larger area, which makes the fluidity of the ceramic materials better. During casting, the ceramic materials can flow through the special-shaped flow holes 6 more smoothly, improving the production efficiency and production quality. At the same time, the special-shaped flow holes 6 with a larger area can also reduce the number of holes, further reducing the production difficulty.

[0036] The overall manufacturing process of the impeller of a medium and small-sized ceramic pump is as follows:

[0037] S1: Conduct three-dimensional modeling design and strength analysis on the special-shaped support plate 2 and the metal hub 1 in industrial software, and then conduct overall three-dimensional design and strength analysis after covering the ceramic layer, and analyze different working conditions through simulation calculations to ensure the overall structural strength of the ceramic impeller and the stress analysis of the impeller during the operation of the pump and meet the operation requirements;

[0038] S2: After analyzing through simulation calculations, select the optimal cooperation plan of the skeleton 5 and the covered ceramic layer, and conduct casting on the support plate 2 and the hub 1, and the ceramic cover plate 3 and the ceramic blades 4 are integrally cast and formed;

[0039] S3: When designing the structure, there is no need to design the front and back shroud blades of the traditional metal impeller, which can reduce the erosion of the front shroud and the rear shroud separately installed in front of and behind the impeller. At the same time, the flow passage is appropriately widened, and the outlet angle of the blade is appropriately increased to ensure that after the impeller blade is thickened, the hydraulic performance of the ceramic impeller is consistent with that of the metal impeller;

[0040] S4: The rear cover plate 11 of the ceramic impeller is specially thickened, preferably 1.3 - 1.8 times the thickness of the traditional metal rear cover plate 11, to ensure the firmness after casting the skeleton 5 inside and meet the strength requirements for the impeller to rotate and do work.

[0041] Furthermore, the special-shaped flow holes 6 are trapezoidal, and the corners of the special-shaped flow holes 6 are transitioned with arcs.

[0042] Furthermore, there are multiple special-shaped flow holes 6, which are evenly distributed along the circumferential direction of the support plate 2.

[0043] In this embodiment, the special-shaped flow holes 6 are designed in a trapezoidal shape. The upper base of the trapezoid is close to the center of the support plate 2, the lower base is close to the edge of the support plate 2, and the width gradually increases from the inside to the outside, perfectly fitting the structural characteristics of the impeller. At the same time, the corners of the trapezoidal flow holes are transitioned with arcs. When casting the ceramic material, the ceramic material can flow smoothly along the trapezoidal flow holes. Due to the arc transition at the corners, there will be no accumulation of the ceramic material, further improving the fluidity. Moreover, multiple such trapezoidal special-shaped flow holes 6 are arranged on the support plate 2 and are evenly distributed along the circumferential direction of the support plate 2. During the casting process, the ceramic material can uniformly pass through each special-shaped flow hole 6, fully filling each part of the skeleton 5, ensuring the uniform distribution of the ceramic material throughout the impeller, thus guaranteeing the overall quality of the impeller, reducing the risk of local stress concentration and quality problems caused by uneven distribution of the ceramic material, and extending the service life of the impeller.

[0044] Furthermore, the hub 1 has a thread 7 inside, which is used for threaded connection with the transmission shaft of the pump.

[0045] In this embodiment, a thread 7 is provided inside the hub 1. When it is necessary to install the impeller on the transmission shaft of the pump, it is connected through the thread 7 inside the hub 1 and the thread 7 of the transmission shaft of the pump. This connection method is simple and reliable, facilitating installation and disassembly. If it is necessary to replace the impeller during actual use, due to the threaded connection, the ceramic impeller can be easily disassembled and then replaced with a metal impeller of the same model or an impeller of other materials. Such a design enables flexible selection of the most suitable impeller material under different working scenarios and requirements to achieve the most economical design and use effect.

[0046] Furthermore, the support plate 2 and the hub 1 are connected by welding.

[0047] In this embodiment, when the space of the rear cover plate 11 of the impeller is small, the welding connection method can well adapt to this situation, make full use of the limited space, and make the structure of the impeller more compact. The production and manufacturing of the welding structure are relatively simple, without the need for high-precision processing equipment and complex assembly processes, reducing the production cost and manufacturing difficulty. The welding connection can also reduce the gap and leakage risk at the connection part, improving the sealing performance and working efficiency of the impeller.

[0048] Furthermore, the support plate 2 and the hub 1 are integrally formed.

[0049] In this embodiment, when the space of the rear cover plate 11 of the impeller is sufficient, it is possible to select the integral formation of the support plate 2 and the hub 1. The integrally formed structure has very high strength, can withstand greater external forces and pressures, and is more stable and reliable during the operation of the pump. Whether it is the centrifugal force generated by high-speed rotation or the impact force when conveying the medium, it can be easily handled, greatly increasing the service life of the impeller. Secondly, the absence of connection gaps can avoid failures caused by loosening or leakage at the connection part, reducing the maintenance cost and downtime. At the same time, the integral forming process can improve production efficiency, reduce the assembly link, reduce the errors and uncertainties in the manufacturing process, and ensure the quality consistency of the impeller.

[0050] Furthermore, it further includes a baffle 8, and the baffle 8 is arranged at the end of the hub 1.

[0051] In this embodiment, the baffle 8 is installed at the end of the hub 1 by means of welding, bolt connection, etc., and the end of the hub 1 is closed to form a blind hole structure. During the operation of the pump, the baffle 8 can effectively block foreign impurities, dust, moisture, etc. from entering the interior of the hub 1, protecting the shaft end connection part. At the same time, when the impeller rotates at high speed, the baffle 8 can also play a certain balancing role, reducing vibration and noise.

[0052] Furthermore, the support plate 2 also has circular flow holes 9.

[0053] Furthermore, there are multiple circular flow holes 9.

[0054] Furthermore, the multiple circular flow holes 9 are evenly distributed along the circumferential direction of the support plate 2.

[0055] In this embodiment, in addition to the irregular flow holes 6 being formed on the support plate 2, circular flow holes 9 are also machined simultaneously. These circular flow holes 9 are multiple and are evenly distributed along the circumferential direction of the support plate 2. During the machining process, the positions of the circular flow holes 9 are controlled to ensure their uniform distribution. When casting the ceramic material, the ceramic material can flow through the irregular flow holes 6 and the circular flow holes 9 simultaneously, further improving the fluidity and casting efficiency of the ceramic material, ensuring the uniform distribution of the ceramic material, making the ceramic material filling in each part of the impeller more sufficient during the casting process, and thus improving the overall quality of the impeller.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Small and medium-sized ceramic pump impeller, characterized in that: The invention comprises a wheel hub (1), a support plate (2), a ceramic cover plate (3) and ceramic blades (4), wherein the support plate (2) is arranged on the wheel hub (1), the support plate (2) and the wheel hub (1) together form a framework (5), the support plate (2) has a special-shaped flow hole (6), the width of the special-shaped flow hole (6) gradually increases from the inside to the outside along the radial direction of the support plate (2), and the ceramic cover plate (3) and the ceramic blades (4) are integrally cast on the framework (5).

2. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: The irregular flow hole (6) is trapezoidal, and the corners of the irregular flow hole (6) are arc transitions.

3. The small and medium-sized ceramic pump impeller according to claim 2, characterized in that: There are a plurality of special-shaped flow holes (6), which are evenly distributed along the circumference of the support plate (2).

4. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: The wheel hub (1) has a thread (7) therein for connecting with the thread (7) of the transmission shaft of the pump.

5. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: The support plate (2) and the wheel hub (1) are connected by welding.

6. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: The support plate (2) and the wheel hub (1) are integrally formed.

7. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: It also comprises a baffle (8), wherein the baffle (8) is arranged at the end of the wheel hub (1).

8. The small and medium-sized ceramic pump impeller according to claim 1, characterized in that: The support plate (2) also has a circular flow hole (9).

9. The small and medium-sized ceramic pump impeller according to claim 8, characterized in that: There are multiple circular flow holes (9).

10. The small and medium-sized ceramic pump impeller according to claim 9, characterized in that: The plurality of circular flow holes (9) are evenly distributed along the circumference of the support plate (2).

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