A composite ceramic pump ceramic auxiliary impeller

Abstract

This utility model discloses a ceramic auxiliary impeller for a composite ceramic pump, comprising an auxiliary impeller ceramic body, a metal frame, a metal hub, and a front cover plate. The auxiliary impeller ceramic body has a hub hole in its middle that mates with the metal hub. The interior of the auxiliary impeller ceramic body has a receiving cavity for accommodating the metal frame. The front end of the auxiliary impeller ceramic body has a cover plate cavity for inserting the front cover plate. The metal frame is circumferentially disposed on the outer surface of the metal hub. After inserting the metal hub into the hub hole and the metal frame into the receiving cavity, a resin-ceramic bonding layer is poured into the receiving cavity. Then, the front cover plate is placed into the cover plate cavity. The resin-ceramic bonding layer connects the auxiliary impeller ceramic body, metal frame, metal hub, and front cover plate into a whole.

Description

Technical Field

[0001] This utility model relates to the field of impeller technology, and in particular to a ceramic auxiliary impeller for a composite ceramic pump. Background Technology

[0002] Slurry pumps are widely used in power plants, chemical plants, metallurgy, cement plants, mines, seawater washing, and river channels due to their advantages such as corrosion resistance, wear resistance, low requirements for intake water (water containing sludge and small solid particles), high efficiency, and strong centrifugal force. Their main functions include diversion, material feeding, sewage discharge, and sludge removal. The impeller and auxiliary impeller of a slurry pump use a transition or clearance fit. The back pressure generated by the auxiliary impeller prevents liquid leakage from the pump. The rotation of the auxiliary impeller balances the axial force generated by the main impeller, reducing mechanical wear and vibration. The design of the auxiliary impeller prevents solid particles and other impurities from entering the pump's sealing device, which is particularly effective when conveying media containing solid particles. Traditionally, slurry pump auxiliary impellers are mostly made of high-chromium steel. However, under prolonged high-intensity operating conditions, damage is easily caused, leading to a decline in the performance and a shortened lifespan of the auxiliary impeller. This, in turn, affects the normal operation of the entire equipment, increasing maintenance costs and downtime.

[0003] Currently, Chinese patent publication number CN210196121U discloses a composite ceramic impeller with a metal skeleton. This patent includes a metal skeleton and a ceramic coating. The ceramic coating is uniformly coated onto the outer surface of the metal skeleton through a casting process. The metal skeleton includes blades, a rear cover plate, and a hub. The blades and rear cover plate are made of perforated plate material. The blades, rear cover plate, and hub are welded to form the metal skeleton. This impeller uses the welding of blades, rear cover plate, and hub to form the metal skeleton, and then uses a casting process to achieve the coating of ceramic onto the metal skeleton, greatly improving the impeller's resistance to brittleness. However, this patent uses direct casting of the ceramic coating onto the outer surface of the metal skeleton, resulting in relatively poor adhesion between the ceramic coating and the metal skeleton. Furthermore, once the metal skeleton shifts during the casting process, it cannot be corrected, causing the metal skeleton and ceramic coating to not be bonded in the intended position, affecting the overall bonding strength. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings and defects of the existing technology by providing a composite ceramic pump ceramic auxiliary impeller to solve the above-mentioned problems.

[0005] The technical problem solved by this utility model can be achieved by the following technical solution:

[0006] A composite ceramic pump ceramic auxiliary impeller includes an auxiliary impeller ceramic body, a metal frame, a metal hub, and a front cover plate. The auxiliary impeller ceramic body has a hub hole in the middle that mates with the metal hub. The interior of the auxiliary impeller ceramic body has a receiving cavity for accommodating the metal frame. The front end of the auxiliary impeller ceramic body has a cover plate cavity for inserting the front cover plate. The metal frame is circumferentially disposed on the outer surface of the metal hub. After the metal hub is inserted into the hub hole and the metal frame is inserted into the receiving cavity, a resin ceramic bonding layer is poured into the receiving cavity. Then, the front cover plate is placed into the cover plate cavity. The resin ceramic bonding layer connects the auxiliary impeller ceramic body, metal frame, metal hub, and front cover plate into a whole.

[0007] In a preferred embodiment of the present invention, the metal frame includes a metal ring connected to the metal hub and a metal edge disposed on the outer periphery of the metal ring and having a first radial structure. The cover plate cavity has a second radial structure that cooperates with the first radial structure, so that the metal frame can be assembled into the receiving cavity after passing through the cover plate cavity.

[0008] In a preferred embodiment of the present invention, the metal ring is provided with a plurality of through holes spaced apart circumferentially, each through hole corresponding to a ceramic insert, and the resin ceramic adhesive layer fills the gap between the through holes and the ceramic insert.

[0009] In a preferred embodiment of this utility model, the ceramic insert has a frustum-shaped structure.

[0010] In a preferred embodiment of this utility model, the front end of the ceramic body of the secondary impeller is provided with a plurality of guide edges spaced apart in the circumferential direction.

[0011] In a preferred embodiment of this utility model, the front cover plate is made of ceramic material.

[0012] By employing the above technical solution, this invention uses a cast resin-ceramic bonding layer as the bonding material to connect various components, avoiding direct casting of the ceramic layer onto the metal frame. This improves the bonding ability between components, ensures impeller strength, maintains stable operating conditions, reduces equipment maintenance and replacement frequency, lowers overall operating costs, reduces the generation of waste metal impellers, and reduces environmental pollution, meeting environmental protection requirements. Furthermore, this invention features high hardness and high wear resistance, effectively resisting particle erosion and abrasion when facing media containing solid particles, extending impeller lifespan, and ensuring stable equipment operation. Moreover, compared to existing technologies where the ceramic layer is directly bonded to the metal frame, the resin-ceramic bonding layer material used in this invention is lighter, reducing equipment operating energy consumption. Additionally, this invention can use ceramic inserts to position the metal frame before casting, preventing displacement during casting and affecting overall bonding strength. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below 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.

[0014] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional view of one embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the ceramic body of the auxiliary impeller according to one embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the metal frame and metal hub according to one embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the front cover plate according to one embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the structure of a ceramic inlay according to an embodiment of the present invention.

[0020] Reference numerals: 100 for secondary impeller ceramic body; 110 for hub hole; 120 for receiving cavity; 130 for cover plate cavity; 140 for guide edge; 200 for metal skeleton; 210 for metal ring; 211 for through hole; 212 for ceramic insert; 220 for metal edge; 300 for metal hub; 400 for front cover plate; 500 for resin ceramic bonding layer. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0022] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Combination Figures 1 to 6 As shown, a composite ceramic pump ceramic auxiliary impeller includes an auxiliary impeller ceramic body 100, a metal frame 200, a metal hub 300, and a front cover plate 400.

[0025] The secondary impeller ceramic body 100 is cast from a mold. A hub hole 110, which mates with the metal hub 300, is provided in the middle of the secondary impeller ceramic body 100. An accommodating cavity 120 for accommodating the metal frame 200 is provided inside the secondary impeller ceramic body 100. A cover plate cavity 130 for inserting the front cover plate 400 is provided at the front end of the secondary impeller ceramic body 100. In this embodiment, several guide edges 140 are spaced circumferentially around the front end of the secondary impeller ceramic body 100, which helps to generate greater back pressure to prevent liquid leakage from the pump.

[0026] The metal frame 200 is circumferentially disposed on the outer surface of the metal hub 300. In this embodiment, the metal frame 200 is cast by mold and is made of ductile iron. The metal hub 300 is machined and is also made of ductile iron. The metal frame 200 includes a metal ring 210 welded to the metal hub 300 and a metal edge 220 disposed on the outer periphery of the metal ring 210 and having a first radial structure. The cover plate cavity 130 has a second radial structure that cooperates with the first radial structure, so that the metal frame 200 can be assembled into the receiving cavity 120 after passing through the cover plate cavity 130.

[0027] In this embodiment, the metal ring 210 is provided with a plurality of through holes 211 spaced apart circumferentially. Each through hole 211 corresponds to a ceramic insert 212, and a gap is left between the through hole 211 and the ceramic insert 212. The ceramic insert 212 has a frustum conical structure. The front cover plate 400 is made of ceramic material. The front cover plate 400 and the ceramic insert 212 are cast by mold. The resin ceramic adhesive layer 500 is liquid resin before casting.

[0028] In the molding process of this utility model, the metal hub 300 is inserted into the hub hole 110 and the metal frame 200 is inserted into the receiving cavity 120 through the cover plate cavity 130. There is a certain gap between the metal frame 200 and the secondary impeller ceramic body 100. The ceramic insert 212 passes through the through hole 211 and the resin ceramic bonding layer 500 is poured into the receiving cavity 120. While the resin ceramic bonding layer 500 is still liquid, the front cover plate 400 is placed into the cover plate cavity 130. The resin ceramic bonding layer 500 connects the secondary impeller ceramic body 100, the metal frame 200, the metal hub 300, and the front cover plate 400 into a whole, resulting in better stability and higher strength.

[0029] In this embodiment, after the resin-ceramic adhesive layer 500 is formed, it fills the gap between the through hole 211 and the ceramic insert 212. This gap is small and does not affect the positioning accuracy. The ceramic insert 212 passes through the through hole 211, and a marker for the positioning ceramic insert 212 can also be provided inside the secondary impeller ceramic body 100. After the resin-ceramic adhesive layer 500 is formed, the ceramic insert 212 and the resin-ceramic adhesive layer 500 can further prevent the metal skeleton 200 from misaligning and rotating. Simultaneously, the material of the ceramic insert 212 is also ceramic, resulting in higher strength and hardness. This invention uses the ceramic insert 212 to position the metal skeleton 200 before casting, preventing the metal skeleton 200 from shifting during casting and affecting the overall bonding strength.

[0030] This invention uses a cast resin-ceramic bonding layer as the adhesive material to connect the various components, avoiding direct casting of the ceramic layer onto the metal frame. This improves the bonding strength between components, ensuring that they do not detach during long-term use, maintaining stable operation, reducing equipment maintenance and replacement frequency, lowering overall operating costs, reducing the generation of waste metal impellers, and minimizing environmental pollution, thus meeting environmental protection requirements. Furthermore, this invention features high hardness and high wear resistance, effectively resisting the erosion and wear of media containing solid particles, extending the impeller's service life, and ensuring stable equipment operation. Moreover, compared to existing technologies where the ceramic layer is directly bonded to the metal frame, the resin-ceramic bonding layer material used in this invention is lighter, reducing the equipment's energy consumption.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite ceramic pump ceramic vane wheel characterized by, The device includes a secondary impeller ceramic body, a metal frame, a metal hub, and a front cover plate. The secondary impeller ceramic body has a hub hole in its middle that mates with the metal hub. The interior of the secondary impeller ceramic body has a receiving cavity for accommodating the metal frame. The front end of the secondary impeller ceramic body has a cover plate cavity for inserting the front cover plate. The metal frame is circumferentially disposed on the outer surface of the metal hub. After the metal hub is inserted into the hub hole and the metal frame is inserted into the receiving cavity, a resin ceramic bonding layer is poured into the receiving cavity. Then, the front cover plate is placed into the cover plate cavity. The resin ceramic bonding layer connects the secondary impeller ceramic body, metal frame, metal hub, and front cover plate into a whole.

2. The ceramic auxiliary impeller of a composite ceramic pump according to claim 1, characterized in that, The metal frame includes a metal ring connected to the metal hub and a metal edge disposed on the outer periphery of the metal ring and having a first radial structure. The cover plate cavity has a second radial structure that cooperates with the first radial structure, so that the metal frame can be assembled into the receiving cavity after passing through the cover plate cavity.

3. The ceramic auxiliary impeller of a composite ceramic pump according to claim 2, characterized in that, The metal ring is provided with several through holes spaced apart circumferentially, each through hole corresponding to a ceramic insert, and the resin ceramic adhesive layer fills the gap between the through holes and the ceramic insert.

4. The ceramic auxiliary impeller of a composite ceramic pump according to claim 3, characterized in that, The ceramic insert has a frustum-shaped structure.

5. The ceramic auxiliary impeller of a composite ceramic pump according to claim 1, characterized in that, The front end of the ceramic body of the secondary impeller is provided with several guide edges at intervals in the circumferential direction.

6. The ceramic auxiliary impeller of a composite ceramic pump according to claim 1, characterized in that, The front cover is made of ceramic material.

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