Ceramic and metal composite structure and delivery pump

Abstract

The utility model relates to ceramic and metal composite structure of delivery pump discloses a ceramic and metal composite structure and delivery pump, including metal structure, ceramic structure and bonding structure, metal structure includes metal volute, metal front guard board and metal rear guard board, and metal front guard board and metal rear guard board are arranged respectively in both ends of metal volute, ceramic structure includes ceramic volute, ceramic front guard board and ceramic rear guard board, and ceramic volute is built into metal volute, and ceramic front guard board and ceramic rear guard board are arranged respectively between metal front guard board and metal rear guard board, bonding structure is arranged between metal volute and ceramic volute, between metal front guard board and ceramic front guard board and between metal rear guard board and ceramic rear guard board. Ceramic and metal composite structure can replace the cast iron and rubber material's overflow device in the existing heavy duty slurry pump, and the service life is increased significantly, can reduce the speed of replacing overflow component greatly, avoids the influence of industrial production of replacing overflow spare.

Description

Technical Field

[0001] This utility model relates to the technical field of ceramic and metal composite structures for delivery pumps, specifically to ceramic and metal composite structures and delivery pumps. Background Technology

[0002] Heavy-duty slurry pumps are industrial pumps specifically designed for conveying high-concentration, highly abrasive, large-particle, or corrosive solid-liquid mixtures. The flow-through components of a heavy-duty slurry pump include the volute, impeller, front / rear guard plates, and liners.

[0003] Currently, some heavy-duty slurry pumps use cast iron and rubber for their flow-through components, such as the volute and front / rear guard plates. These components have a relatively short service life and require regular replacement.

[0004] The short service life of flow-through components made of cast iron and rubber means that heavy-duty slurry pumps need to replace these components frequently, which affects production operations. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a ceramic-metal composite structure and a conveying pump to solve the technical problem that the short service life of the flow-through components made of cast iron and rubber in the prior art leads to the need for frequent replacement of the flow-through components in heavy-duty slurry pumps.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a ceramic-metal composite structure, comprising: A metal structure includes a metal volute, a metal front guard plate, and a metal rear guard plate, wherein the metal front guard plate and the metal rear guard plate are respectively disposed at both ends of the metal volute and are detachably connected to the metal volute. A ceramic structure includes a ceramic volute, a ceramic front guard plate, and a ceramic rear guard plate. The ceramic volute is housed within a metal volute. The ceramic front guard plate and the ceramic rear guard plate are respectively disposed between the metal front guard plate and the metal rear guard plate, and together with the ceramic volute, form a vortex chamber. An adhesive structure is provided between the metal volute and the ceramic volute, between the metal front guard plate and the ceramic front guard plate, and between the metal rear guard plate and the ceramic rear guard plate. The adhesive structure and the ceramic volute, the ceramic front guard plate and the ceramic rear guard plate are provided with a concave-convex structure that fits in through grooves and protrusions.

[0007] Secondly, this utility model also provides a delivery pump, including the above-mentioned ceramic and metal composite structure.

[0008] Compared with the prior art, the ceramic and metal composite structure and conveying pump provided by this utility model can replace some of the flow-through components in the slurry pump. In the replaced slurry pump, a ceramic volute, a ceramic front guard plate and a ceramic rear guard plate are installed in the metal structure. The ceramic volute, the ceramic front guard plate and the ceramic rear guard plate form a volute that contacts the fluid. The wear resistance of the ceramic volute, the ceramic front guard plate and the ceramic rear guard plate is much higher than that of cast iron and ceramic, and the service life is significantly increased. This can greatly reduce the speed of replacing flow-through components and avoid the impact of replacing flow-through components on industrial production.

[0009] While ceramics are highly wear-resistant, they are brittle. To prevent ceramic components from breaking due to fluid impact, a metal volute, a metal front guard plate, and a metal rear guard plate are incorporated. When the ceramic component is subjected to impact, the impact is transferred to the metal components, which enhance the impact resistance of the ceramic component, resisting large particle impacts, mechanical vibrations, and installation stresses, thus preventing ceramic cracking. The adhesive structure enables the connection between the ceramic and the metal, and also absorbs differences in thermal expansion and contraction as well as minor deformation stresses. Since the adhesive is attracted to metal but repellent to ceramic, a textured structure is incorporated between the ceramic and the adhesive structure to enhance the bonding strength and prevent the ceramic from detaching. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a delivery pump provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of a local part of the structure; Figure 3 This is a cross-sectional view of the metal volute and ceramic volute in a ceramic-metal composite structure provided in an embodiment of this utility model. Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle; Figure 5 yes Figure 3 A magnified view of a portion of point C in the middle; Figure 6 This is a cross-sectional view of the metal volute in a ceramic-metal composite structure provided in an embodiment of this utility model; Figure 7 This is a cross-sectional view of the inner lining component in a ceramic-metal composite structure provided in an embodiment of the present invention when they are spliced ​​together. Figure 8 This is a cross-sectional view of the metal front guard plate and the ceramic front guard plate in a ceramic-metal composite structure provided in an embodiment of the present invention. Figure 9 yes Figure 8 A magnified view of a portion of point D in the middle; Figure 10 yes Figure 8A magnified view of a portion of point E in the middle; Figure 11 This is a cross-sectional view of the metal front guard plate and the ceramic front guard plate after separation in a ceramic-metal composite structure provided in an embodiment of this utility model. Figure 12 yes Figure 11 A magnified view of a portion of point F in the middle; Figure 13 yes Figure 11 A magnified view of a portion of point G in the middle; Figure 14 This is a cross-sectional view of a partial structure of the metal front guard plate and the ceramic front guard plate in a ceramic-metal composite structure provided in an embodiment of this utility model. Figure 15 This is a schematic diagram of the ceramic front guard plate in a ceramic-metal composite structure provided in one embodiment of the present invention; Figure 16 yes Figure 15 Cross-sectional view of the ceramic front guard plate; Figure 17 yes Figure 16 A magnified view of a portion of point H in the middle; Figure 18 This is a schematic diagram of the ceramic front guard plate in a ceramic-metal composite structure provided in one embodiment of the present invention; Figure 19 yes Figure 18 Cross-sectional view of the ceramic front guard plate; Figure 20 This is a schematic diagram of the ceramic front guard plate in a ceramic-metal composite structure provided in one embodiment of the present invention; Figure 21 yes Figure 20 Cross-sectional view of the ceramic front guard plate; Figure 22 This is a schematic diagram of the impeller structure in a ceramic-metal composite structure provided in an embodiment of the present invention; Figure 23 This is a schematic diagram of the impeller body in a ceramic-metal composite structure provided in an embodiment of the present invention; Figure 24 This is a cross-sectional view of the impeller structure in a ceramic-metal composite structure provided in an embodiment of this utility model; Figure 25 yes Figure 24 A magnified view of a portion of point A in the middle; Figure 26 This is a schematic diagram of a portion of the ceramic cover plate in a ceramic-metal composite structure provided in one embodiment of the present invention. Figure 27This is a schematic diagram of a portion of the metal skeleton in a ceramic-metal composite structure provided in one embodiment of the present invention.

[0011] Explanation of reference numerals in the attached figures: Metal structure 1; metal volute 11; cavity 11a; mounting channel 11b; volute 111; first fixing hole 111a; second fixing hole 111b; filling port 111c; diffuser 112; third through hole 112a; sealing plug 113; metal front guard plate 12; grouting hole 12a; metal protrusion 12b; disc 121; sleeve 122; metal rear guard plate 13; end face 13a; cylindrical surface 13b; Ceramic structure 2; Ceramic volute 21; Locking block 21a; Locking groove 21b; First inner liner 211; First inner liner 2111 (first position); Second to last first inner liner 2112; First inner liner 2113 (last position); Second inner liner 212; Seventh protrusion 213; Ceramic front guard plate 22; Panel piece 221; Second through hole 221a; First mating part 221b; Fifth protrusion 221b1; Sixth protrusion 221b2; Annular cavity 221c; Annular groove 221d; Recessed stop 221e; Hollow shaft 222; Boss structure 222a; Ceramic rear guard plate 23; Adhesive structure 3; First adhesive layer 31; Second adhesive layer 32; Second mating part 32a; Impeller structure 4; Impeller body 41; First groove 41a; Inlet 41b; Inter-blade flow channel 41c; Channel 41d; End plate 411; Blade 412; Fourth protrusion 413; Ceramic cover plate 42; Plate 421; Labyrinth structure 422; Second protrusion 423; Third protrusion 424; First protrusion 425; Protrusion structure 42a; Metal frame 43; Fixing plate 431; Connector 432; First reinforcing plate 4321; Second reinforcing plate 4322; Opening 43a; Third fixing hole 43b; Third adhesive layer 44; Pump casing structure 5; front pump casing 51; rear pump casing 52; Transmission structure 6. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] To address the technical problem of frequent replacement of flow-through components in heavy-duty slurry pumps due to their short service life, which necessitates the use of cast iron and rubber materials, this invention provides a ceramic-metal composite structure and a pump that can reduce the replacement speed of flow-through components and avoid the impact of frequent replacements on industrial production.

[0014] It should be noted that the ceramic-metal composite structure described in this utility model is used in, but not limited to, pumps. For ease of explanation, this utility model only uses the application of the ceramic-metal composite structure in a pump as an example. The principle of applying the ceramic-metal composite structure to other types of equipment is essentially the same as that applied to a pump, and will not be elaborated here.

[0015] Please see Figures 1 to 27 As shown, Figure 1 This is a schematic diagram of a ceramic-metal composite structure in one embodiment of the present invention. The ceramic-metal composite structure includes a metal structure 1, a ceramic structure 2, and an adhesive structure 3. The metal structure 1 includes a metal volute 11, a metal front guard plate 12, and a metal rear guard plate 13. The metal front guard plate 12 and the metal rear guard plate 13 are respectively disposed at both ends of the metal volute 11 and are detachably connected to the metal volute 11. The ceramic structure 2 includes a ceramic volute 21, a ceramic front guard plate 22, and a ceramic rear guard plate 23. The ceramic volute 21 is built into... A metal volute 11, a ceramic front guard plate 22, and a ceramic rear guard plate 23 are respectively disposed between the metal front guard plate 12 and the metal rear guard plate 13, and together with the ceramic volute 21, form a volute chamber. An adhesive structure 3 is disposed between the metal volute 11 and the ceramic volute 21, between the metal front guard plate 12 and the ceramic front guard plate 22, and between the metal rear guard plate 13 and the ceramic rear guard plate 23. The adhesive structure 3 has a concave-convex structure with grooves and protrusions for engagement with the ceramic volute 21, the ceramic front guard plate 22, and the ceramic rear guard plate 23. It should be understood that the metal front guard plate 12 and the metal rear guard plate 13 can be detachably connected to the metal volute 11 using bolts, screws, and clips.

[0016] When it is necessary to replace the flow-through components of the slurry pump, remove the front pump casing 51, then remove the impeller structure 4. Remove the volute, front guard plate, and rear guard plate inside the front pump casing 51 and rear pump casing 52. Install the metal rear guard plate 13 onto the rear pump casing 52. Then connect the impeller structure 4 to the drive shaft of the slurry pump's transmission assembly. Connect the metal volute 11 to the rear metal guard plate and fit the metal volute 11 onto the impeller structure 4. Then connect the metal front guard plate 12 to the metal turbine. Connect the rear pump casing 52 to the front pump casing 51 and connect it to the metal turbine. The front guard plate 12 is connected to the slurry pump, enabling the replacement of some flow-through components. In the replaced slurry pump, the metal structure 1 is equipped with a ceramic volute 21, a ceramic front guard plate 22, and a ceramic rear guard plate 23. The ceramic volute 21, ceramic front guard plate 22, and ceramic rear guard plate 23 form a volute chamber that contacts the fluid. The wear resistance of the ceramic volute 21, ceramic front guard plate 22, and ceramic rear guard plate 23 is much higher than that of cast iron and ceramics, and the service life is significantly increased. This can greatly reduce the speed of replacing flow-through components and avoid affecting industrial production when replacing flow-through components.

[0017] While ceramics are highly wear-resistant, they are brittle. To prevent ceramic components from breaking due to fluid impact, a metal volute 11, a metal front guard plate 12, and a metal rear guard plate 13 are provided. These components reinforce the ceramic volute 21, ceramic front guard plate 22, and ceramic rear guard plate 23, resisting large particle impacts, mechanical vibrations, and installation stresses, thus preventing ceramic breakage. The bonding structure 3 connects the ceramic to the metal and absorbs thermal expansion and contraction differences and minor deformation stresses. Since adhesives are metal-friendly and ceramic-repellent, a textured structure is provided between the ceramic and the bonding structure 3 to enhance the bonding strength and prevent ceramic detachment.

[0018] It should be understood that, in order to replace the metal or rubber flow components in existing slurry pumps with ceramic-metal composite structures, in one embodiment, the ceramic volute 21, the ceramic front guard plate 22, and the ceramic rear guard plate 23 are 3D printed structures. Using 3D printing allows for the production of complex-shaped ceramic structures 2, enabling the formation of uneven structures on the ceramic structure 2, and enhancing the connection strength with the metal structure 1 while reducing thickness.

[0019] To further enhance the bonding strength between the ceramic and the adhesive structure 3, in one embodiment, the outer diameter of the protrusion is at least locally increased along the protrusion direction.

[0020] In this embodiment, by setting the protrusion to be at least partially enlarged along the protrusion direction, when the protrusion and the groove are fitted together, a dovetail joint structure similar to that in mortise and tenon joints is formed. This can effectively resist the impact of high-speed slurry on the ceramic liner, prevent the high-frequency vibration during equipment operation from causing the ceramic and metal displacement to accumulate and loosen, avoid the ceramic liner from falling off and failing under extreme working conditions, and ensure the structural integrity.

[0021] In order to position the metal front guard plate 12, the metal rear guard plate 13 and the metal volute 11, in one embodiment, the metal volute 11 is hollow inside and has first through holes at both ends; the metal front guard plate 12 and the metal rear guard plate 13 each have an end face 13a that abuts against the end of the metal volute 11 and a cylindrical surface 13b that fits against the inner wall of the first through hole, and the cylindrical surface 13b is perpendicular to the end face 13a.

[0022] In this embodiment, end face 13a provides axial positioning to precisely control the distance between the volute and the guard plate, while cylindrical surface 13b provides radial positioning to ensure that the volute flow channel and the inner hole of the guard plate are strictly concentric. The orthogonality of end face 13a and cylindrical surface 13b eliminates degrees of freedom, forming a rigid spatial constraint and reducing leakage loss. End face 13a and cylindrical surface 13b form a straight stop, which mates with the metal volute 11 to achieve the positioning of the metal rear guard plate 13, the metal front guard plate 12, and the metal volute 11. The straight stop can be formed in one step by turning, which is easy to process and inspect. At the same time, the mutually perpendicular end face 13a and cylindrical surface 13b can form a labyrinth fit with the metal volute 11 to enhance the sealing performance.

[0023] To reduce the weight of the metal volute 11 and the ceramic volute 21, therefore, as follows: Figure 3 , Figure 6 and Figure 7 As shown, in one embodiment, the metal volute 11 has a cavity, and the outer wall of the metal volute 11 has an installation channel 11b communicating with the cavity 11a; the ceramic volute 21 includes multiple inner lining components, which are spliced ​​together to form an inner liner that fits with the inner wall of the metal volute 11. The size of the inner lining components is set to be smaller than the inner diameter of the installation channel 11b, so that the inner lining components can enter the cavity 11a through the installation channel 11b; the adhesive structure 3 includes a first adhesive layer 31, which is disposed between the inner liner and the inner wall of the cavity 11a.

[0024] When assembling the metal volute 11 and the ceramic volute 21, multiple inner lining components are fed into the cavity 11a through the installation channel 11b, and then assembled in the cavity 11a to form the inner liner. The inner lining components can protect the inner wall of the cavity 11a. At the same time, since the inner lining components enter the cavity 11a through the installation channel 11b, it is not necessary to set the metal volute 11 as a split structure. Under the premise of achieving the preset structural strength, the thickness of the integral metal volute 11 is relatively thin, and there is no need to thicken the metal volute 11, thus reducing the weight and cost of the metal volute 11. The first adhesive layer 31 can connect the metal volute 11 and the inner lining components. The connection allows the metal volute 11 and the inner liner assembly to bond together as a whole, enabling the impact force borne by the inner liner assembly to be transmitted to the metal volute 11 via the first adhesive layer 31. The first adhesive layer 31 can seal the gap between the inner liner assembly and the cavity 11a. The first adhesive layer 31 can be formed by injecting adhesive into the gap between the inner liner and the cavity 11a. After the adhesive is fixed, the first adhesive layer 31 is formed. The adhesive can also penetrate into the gaps between adjacent inner liner assemblies, sealing the gaps between adjacent inner liner assemblies. The adhesive components can be resin adhesives, vertical adhesives, and mixtures of silicon carbide particles, etc.

[0025] It should be understood that the cavity 11a can be circular, involute, etc., specifically, such as Figure 6 and Figure 3 As shown, in one embodiment, the cavity 11a is vortex-shaped, and the shape of the inner liner matches the shape of the cavity 11a, with the inner liner being circumferentially positioned via the cavity 11a.

[0026] In this embodiment, by setting the cavity 11a as a vortex, when the shape of the inner liner matches the shape of the cavity 11a, the inner wall of the vortex-shaped cavity 11a can position the inner liner circumferentially, and since the inner liner matches the inner wall of the cavity 11a, the arc surface of the inner liner can position the inner liner axially.

[0027] It should be understood that adjacent lining components can be connected and secured using bolts, mortises, and adhesives. Specifically, for example... Figure 4 As shown, in one embodiment, a snap-fit ​​structure is formed between adjacent liner components.

[0028] In this embodiment, adjacent lining components are engaged by a snap-fit ​​structure, which can fix and position the adjacent lining components. At the same time, during the snap-fit ​​process, a maze structure 422 is formed to prevent fluid from passing between adjacent lining components, which can effectively prevent fluid from passing through the joint of adjacent lining components.

[0029] The ends of the inner lining components that are spliced ​​are provided with a locking block 21a and a locking groove 21b, which are fitted into each other with the locking blocks 21a and locking grooves 21b of the adjacent inner lining components.

[0030] It should be understood that the metal volute 11 can be the housing of various types of pump bodies, such as Figure 6 As shown, specifically, in one embodiment, the metal volute 11 includes a volute 111 and a diffuser tube 112. The volute 111 is hollow inside, and a first fixing hole 111a and a second fixing hole 111b are respectively provided at the end and on the peripheral wall. The diffuser tube 112 is connected to the volute 111 and is arranged along the tangential direction of the volute 111. The diffuser tube 112 has a third through hole 112a that communicates with the second fixing hole 111b. The third through hole 112a and the first fixing hole 111a form an installation channel 11b.

[0031] In this embodiment, the volute 111 and the diffuser tube 112 are combined to form a vortex-shaped cavity 11a. The inner liner assembly can be completely inserted into the volute 111 and the diffuser tube 112 through the first fixing hole 111a of the volute 111, or it can be partially inserted into the volute 111 through the first fixing hole 111a and the other part inserted into the diffuser tube 112 through the third through hole 112a for installation, so that the inner liner assembly can be inserted into the integral metal volute 11.

[0032] It should be understood that the volute 111 and diffuser 112 can be processed separately and then assembled. Specifically, in one embodiment, the volute 111 and diffuser 112 are integrally cast parts. By casting, the volute 111 and diffuser 112 are integrally formed without subsequent processing. Moreover, the structure of the cast part is lighter in thickness and weight than the assembled part while achieving the same structural strength.

[0033] like Figure 3 and Figure 7 As shown, in one embodiment, the multiple liner components are a first liner 211 and a second liner 212. There are multiple first liner components 211. The size of the multiple first liner components 211 is set to be smaller than the size of the first fixing hole 111a, and can enter the volute 111 through the first fixing hole 111a. The size of the second liner component 212 is set to be smaller than the size of the second fixing hole 111b, and can enter the diffuser 112 through the second fixing hole 111b.

[0034] In this embodiment, the inner liner assembly is divided into a first inner liner 211 and a second inner liner 212. Multiple first inner liners 211 enter the volute 111 through a first fixing hole 111a, forming a vortex structure that mates with the inner wall of the volute 111. The second inner liner 212 is installed into the diffuser 112 through a third through hole 112a, and is fitted with the first inner liner 211 using a concave-convex structure. Simultaneously, the structure formed by the combination of the second inner liner 212 and the first inner liner 211 is interconnected. It should be understood that the number of first inner liners 211 can be three, four, five, six, seven, eight, etc.

[0035] It should be understood that the multiple first inner liner pieces 211 can be divided into multiple pieces along the circumference of the volute 111 to match the inner cavity shape of the volute 111, and then the divided first inner liner pieces 211 are spliced ​​together in the volute 111 to form a vortex structure that matches the inner cavity shape of the volute 111.

[0036] It should be understood that the multiple first inner liner components 211 can be installed and connected in various ways, specifically, such as Figure 3 and Figure 7 As shown, in one embodiment, multiple first inner lining members 211 are sequentially spliced ​​along the circumference of the cavity 11a, and are connected end to end. When the vortex-shaped cavity 11a positions one of the first inner lining members 211, the other first inner lining members 211 can also be positioned through the inner lining member. By sequentially connecting end to end, all the first inner lining members 211 can be positioned circumferentially.

[0037] Since multiple first inner lining pieces 211 are sequentially spliced ​​along the circumference of the cavity 11a using a concave-convex structure, when splicing to the last first inner lining piece 2113, this last first inner lining piece 2113 needs to be connected to both the second-to-last first inner lining piece 2112 and the first first inner lining piece 2111. To ensure that the last first inner lining piece 2113 can be embedded into both the first and second-to-last first inner lining pieces 2111, and to also utilize a concave-convex structure for snap-fit ​​connection, therefore, as follows... Figure 7 As shown, in one embodiment, an installation space is formed between the first inner liner 2111 located at the first position and the second to last first inner liner 2112 for installing the last first inner liner 2113. The installation space is stepped and at least partially increases in size along the direction close to the center of the cavity 11a. The last first inner liner 2113 can be inserted into the installation space from the center of the cavity 11a.

[0038] like Figure 7 As shown, the first inner liner at the beginning is marked as 2111, the second to last first inner liner is marked as 2112, and the last first inner liner is marked as 2113. The installation space between the first inner liner 2111 and the second to last first inner liner 2112 is stepped, with at least a partial increase in step size along the direction near the cavity 11a. The last first inner liner 2113 has at least a partial decrease in step size along the direction near the inner wall of the cavity 11a, allowing the last first inner liner 2113 to be inserted into the installation space and also to be snapped into place via the stepped structure.

[0039] It should be understood that the maximum length of each first inner liner 211 is less than the inner diameter of the first fixing hole 111a, so that the first inner liner 211 can enter the volute 111 through the first fixing hole 111a, and the outer diameter of the second inner liner 212 is less than the inner diameter of the third through hole 112a, so that the second inner liner 212 can enter the diffuser 112 through the third through hole 112a.

[0040] like Figure 3 and Figure 7 As shown, the first inner liner 211 located at the first position is disposed at the connection between the volute 111 and the diffuser tube 112, and the shape of the first inner liner 211 is adapted to the shape of the connection between the volute 111 and the diffuser tube 112. The second inner liner 212 is a tubular structure, and the second inner liner 212 and the first inner liner 211 at the first position are fitted together by a slot and a ring body inserted into the slot.

[0041] like Figure 4As shown, in one embodiment, a seventh protrusion 213 is provided on the side of the liner assembly opposite to the center of the cavity 11a. This serves two purposes: firstly, to enhance the structural strength of the first liner 211, and secondly, to enhance the overall strength of the composite structure.

[0042] In order to allow the adhesive to enter the volute 111 and the diffuser 112, for this purpose, such as Figure 5 As shown, in one embodiment, the top and bottom of the volute 111 are provided with filling ports 111c, which are connected to the interior of the volute 111. The metal volute 11 also includes a sealing plug 113, which is detachably connected to the filling port 111c.

[0043] By providing the filling port 111c, the adhesive can enter the volute 111 and the diffuser tube 112 from the filling port 111c, so that the adhesive can fill the gap between the volute 111 and the first inner liner 211 and the gap between the diffuser tube 112 and the second inner liner 212; by providing the sealing plug 113, the sealing plug 113 can seal the filling port 111c to prevent uncured adhesive from flowing out.

[0044] It should be understood that the first inner liner 211 and the second inner liner 212 can be formed by casting, die casting, or other methods. Specifically, in one embodiment, the first inner liner 211 is a 3D printed structure. Producing the first inner liner 211 and the second inner liner 212 by printing eliminates the need for mold forming, greatly reducing production costs and production cycle, and shortening the product manufacturing cycle.

[0045] To address the issue of the ceramic front skid plate 22 potentially detaching from the metal front skid plate 12, therefore, as follows: Figure 8 , Figure 9 and Figure 19 As shown, in one embodiment, the ceramic front guard plate 22 includes a panel 221 and a hollow shaft 222. The panel 221 is disposed on one side of the metal front guard plate 12 and has a second through hole 221a. The hollow shaft 222 is coaxially disposed with the second through hole 221a. The hollow shaft 222 forms a boss structure 222a that cooperates with the metal front guard plate 12. The boss structure 222a is used to restrict the movement of the hollow shaft 222 in the direction close to the panel 221. The adhesive structure 3 includes a second adhesive layer 32. The second adhesive layer 32 is disposed between the metal front guard plate 12 and the panel 221 and is fitted with the panel 221 in a concave-convex structure. The second adhesive layer 32 is also disposed between the hollow shaft 222 and the metal front guard plate 12.

[0046] Specifically, in the axial direction of the hollow shaft 222, the direction closer to the panel member 221 is the first direction, and the direction farther from the panel member 221 is the second direction. The panel member 221 is disposed on one side of the metal front guard plate 12. Due to the restriction of the metal front guard plate 12, the panel member 221 cannot move along the second direction. The hollow shaft 222 has a boss structure 222a that cooperates with the metal front guard plate 12. The boss structure 222a cooperates with the metal front guard plate 12 to restrict the movement of the hollow shaft 222 along the first direction. Moreover, when the fluid conveying device is working, the fluid generally passes through the hollow shaft along the first direction. The hollow shaft 222 bears relatively small force along the second direction. By providing a second adhesive layer 32, the hollow shaft 222, panel piece 221, and metal front guard plate 12 are connected to form a whole. At the same time, the second adhesive layer 32 and panel piece 221 are fitted with a concave-convex structure, which can further restrict the panel piece 221 from detaching from the metal front guard plate 12 along the first direction. Through the cooperation between the hollow shaft 222, panel piece 221, and metal front guard plate 12, the hollow shaft 222 and panel piece 221 can be restricted from detaching from the metal front guard plate 12.

[0047] It should be understood that the metal front guard plate 12 can be a metal component of any structure and shape, specifically, such as Figure 11 As shown, in one embodiment, the metal front guard plate 12 includes a connected disc 121 and a sleeve 122. The disc 121 is disposed against the panel piece 221, and the sleeve 122 is sleeved on the hollow shaft 222 and is coaxially disposed with the hollow shaft 222.

[0048] It should be understood that the boss structure 222a can be a protrusion located on one side of the hollow shaft 222, or a protruding ring located at one end of the hollow shaft 222. Specifically, for example... Figure 9 As shown, in one embodiment, the boss structure 222a is a ring body disposed at one end of the hollow shaft 222, and the outer diameter of the ring body gradually decreases along the direction close to the panel member 221.

[0049] It should be understood that the panel 221 and the second adhesive layer 32 are fitted together through a concave-convex structure. In one embodiment, the panel 221 forms a protrusion, and the second adhesive layer 32 wraps around the protrusion to form a groove that matches the protrusion, thus achieving fitting together through the engagement of the protrusion and the groove. In another embodiment, the panel 221 has a groove, the second adhesive layer 32 is embedded in the groove, and forms a protrusion that matches the groove, thus achieving fitting together through the engagement of the groove and the protrusion. In yet another embodiment, the panel 221 has both protrusions and grooves, and the second adhesive layer 32 forms grooves and protrusions that match the protrusions and grooves of the panel 221, thereby achieving fitting together between the panel 221 and the second adhesive layer 32.

[0050] It should be understood that the materials of panel 221 and hollow shaft 222 can be silicon carbide ceramic, silicon nitride ceramic, silicon nitride composite silicon carbide ceramic, alumina ceramic and zirconium oxide ceramic, etc.; the material of metal front guard plate 12 can be cast iron, stainless steel, etc.; the second adhesive layer 32 can be formed by curing epoxy resin, or by curing phenolic resin, or by compounding epoxy resin and phenolic resin with other components.

[0051] Because the adhesive used in the second adhesive layer 32 is generally metal-friendly and ceramic-repellent, the bonding force between the second adhesive layer 32 and the panel 221 is less than the bonding force between the second adhesive layer 32 and the metal front guard plate 12. Therefore, as Figure 12 As shown, in one embodiment, panel member 221 has a first mating portion 221b, and second adhesive layer 32 has a second mating portion 32a that mates with the first mating portion 221b. The second mating portion 32a and the first mating portion 221b are fitted together using a concave-convex structure. One of the second mating portion 32a and the first mating portion 221b is a protrusion and the other is a groove. The protrusion has at least a partial increase in size along the protrusion direction.

[0052] In this embodiment, based on the use of a concave-convex structure for fitting between the second adhesive layer 32 and the panel 221, the protrusion is further enlarged at least locally along the protrusion direction. When the protrusion engages with the groove, an inverted structure is formed, so that the protrusion is stuck in the groove structure, which can further increase the bonding force between the panel 221 and the second adhesive layer 32 and prevent the panel 221 from detaching from the metal front guard plate 12.

[0053] It should be understood that, such as Figure 18 and Figure 20 As shown, the protrusion can be a stepped cylinder, consisting of a large cylinder and a small cylinder, with the large cylinder located on the side of the small cylinder facing away from the panel 221, as shown. Figures 15 to 21 As shown, the protrusions can also be structures with progressively increasing outer diameters, such as a conical structure; the grooves can be set as dovetail grooves, conical grooves, trapezoidal grooves, etc. When the panel 221 is provided with a groove, the inner diameter of the groove increases along the direction of penetrating the panel 221.

[0054] It should be understood that the number of the first mating part 221b and the second mating part 32a can be one or more. When the first mating part 221b and the second mating part 32a are set to multiple, the multiple first mating parts 221b are distributed at intervals on the panel part 221, and the multiple second mating parts 32a are distributed at intervals on the second adhesive layer 32.

[0055] Specifically, in one embodiment, the first mating part 221b is a groove provided on the panel member 221, and the size of the groove is at least partially increased along the depth direction; the second mating part 32a is a protrusion that fits into the groove.

[0056] In this embodiment, the first mating part 221b is a groove opened in the panel. The size of the groove increases at least partially along the depth direction. When the adhesive enters the groove and cures, the adhesive forms a protrusion that matches the groove. The size of the protrusion increases at least partially along the protrusion direction. An inverted structure is formed between the protrusion and the groove structure, which can restrict the separation of the panel 221 from the second adhesive layer 32.

[0057] It should be understood that, as shown in Figure 14, in this embodiment, a metal protrusion 12b can be further provided on the metal front guard plate 12. The metal protrusion 12b is embedded in the groove of the panel piece 221, and the second adhesive layer 32 fills the gap between the metal protrusion 12b and the groove, further enhancing the connection strength between the metal front guard plate 12 and the panel piece 221.

[0058] Specifically, such as Figures 15 to 17 As shown, in another embodiment, the first mating part 221b is a protrusion provided on the panel member 221, and the size of the protrusion is increased at least partially along the protrusion direction; the second mating part 32a is a groove fitted onto the protrusion.

[0059] In this embodiment, the first mating part 221b is a protrusion provided on the panel 221. When adhesive is filled between the panel 221 and the metal front guard plate 12, the adhesive can wrap the protrusion to form a groove that matches the shape of the protrusion. Since the size of the protrusion increases at least partially along the protrusion direction, the groove formed after the adhesive is cured can engage with the protrusion and form an inverted structure, which can restrict the panel 221 from separating from the second adhesive layer 32.

[0060] Specifically, such as Figure 15 and Figure 17 As shown, in another embodiment, the protrusion is divided into a fifth protrusion 221b1 and a sixth protrusion 221b2. The fifth protrusion 221b1 and the sixth protrusion 221b2 are at least partially enlarged in size along the protrusion direction, and the height of the sixth protrusion 221b2 is higher than the height of the fifth protrusion 221b1. The metal front guard plate 12 is provided with a receiving groove relative to the sixth protrusion 221b2, and the metal front guard plate 12 is sleeved on the sixth protrusion 221b2 through the receiving groove. The second adhesive layer 32 is also provided in the gap between the sixth protrusion 221b2 and the receiving groove.

[0061] In this embodiment, based on the first mating part 221b being configured as a protrusion, the protrusion is divided into a fifth protrusion 221b1 and a sixth protrusion 221b2. The sixth protrusion 221b2 is higher than the fifth protrusion 221b1 and can be embedded into the corresponding receiving groove of the metal front guard plate 12. After the adhesive is injected, the adhesive covers the fifth protrusion 221b1 and the sixth protrusion 221b2, forming an inverted structure with the fifth protrusion 221b1 and the sixth protrusion 221b2 respectively, and realizing the connection between the sixth protrusion 221b2 and the metal front guard plate 12, further enhancing the structural strength between the panel part 221 and the metal front guard plate 12. It should be understood that the height of the fifth protrusion 221b1 can be 0.5cm to 2cm, and the taper is 5° to 10°.

[0062] To further enhance the bonding strength between panel 221 and the second adhesive layer 32, therefore, as Figure 8 , Figure 11 and Figure 12 As shown, in one embodiment, an annular cavity 221c with an open end is formed on one side of the panel member 221. The axis of the annular cavity 221c is parallel to the axis of the second through hole 221a. At least one annular groove 221d is formed on the circumferential inner wall of the annular cavity 221c. The metal front guard plate 12 is at least partially embedded in the annular cavity 221c. The second adhesive layer 32 is also disposed in the annular groove 221d.

[0063] In this embodiment, by providing an annular cavity 221c in the panel component 221, when the adhesive fills the annular cavity 221c, it simultaneously connects the bottom and peripheral wall of the annular cavity 221c, increasing the connection area between the second adhesive layer 32 and the panel component 221, and enhancing the structural strength between the second adhesive layer 32 and the panel component 221. Furthermore, an annular groove 221d is provided in the peripheral wall of the annular cavity 221c. When the adhesive fills the annular cavity 221c, the adhesive enters the annular groove 221d. The cured second adhesive layer 32, by cooperating with the annular groove 221d, can restrict the second adhesive layer 32 from detaching from the panel component 221 along the opening direction of the annular cavity 221c.

[0064] In order to position the panel 221 and the hollow shaft 222, for this purpose, as follows: Figure 8 and Figure 19 As shown, in one embodiment, panel 221 is provided with a recessed stop 221e; hollow shaft 222 is inserted into the recessed stop 221e and is sealed to the inner wall of the recessed stop 221e.

[0065] In this embodiment, by providing a recessed stop 221e on the panel 221, and inserting the hollow shaft 222 into the recessed stop 221e, the end of the hollow shaft 222 can seal and fit against the inner wall of the recessed stop 221e. This can prevent the adhesive from flowing through the gap between the hollow shaft 222 and the recessed stop 221e during the adhesive filling process. At the same time, the inner wall of the recessed stop 221e can position the axial position of the hollow shaft 222.

[0066] Since the panel component 221 may have grooves or protrusions, and the material of the panel component 221 is ceramic, traditional processing methods for the panel component 221 are difficult. Therefore, in one embodiment, the panel component 221 is a 3D printed structure. By using printing to produce the panel component 221, it is possible to process ceramic panel components 221 with complex structures and shapes.

[0067] In order to allow adhesive to be injected into the gap between the hollow shaft 222 and the metal front guard plate 12, for this purpose, as follows: Figure 11 As shown, in one embodiment, the metal front guard plate 12 has a grouting hole 12a; the gap between the panel piece 221 and the metal front guard plate 12 is connected to the grouting hole 12a; the gap between the hollow shaft 222 and the metal front guard plate 12 is connected to the grouting hole 12a.

[0068] In this embodiment, by opening a grouting hole 12a on the metal front guard plate 12, the adhesive can enter the gap between the metal front guard plate 12, the panel component 221, and the hollow shaft 222 through the grouting hole 12a. After the injected adhesive cures, a second adhesive layer 32 is formed. It should be understood that before injecting the adhesive, any gaps between the metal front guard plate 12 and the panel component 221 that may have leaked adhesive are sealed. Sealing methods include applying sealant, applying a sealing film, etc.

[0069] To prevent the ceramic from separating from the metal in impeller structure 4, therefore, as follows: Figure 24 As shown, in one embodiment, the ceramic-metal composite structure further includes an impeller structure 4. The impeller structure 4 includes an impeller body 41, a ceramic cover plate 42, a metal frame 43, and a third adhesive layer 44. The ceramic cover plate 42 is disposed at the end of the impeller body 41. The metal frame 43 is embedded in the impeller body 41 and disposed between the impeller body 41 and the ceramic cover plate 42. The third adhesive layer 44 connects the metal frame 43, the impeller body 41, and the ceramic cover plate 42. A groove structure and a protrusion structure 42a are provided between the third adhesive layer 44, the ceramic cover plate 42, and the impeller body 41. The outer diameter of the protrusion structure 42a increases at least partially along the protrusion direction.

[0070] Specifically, by providing a metal frame 43 inside the impeller body 41 and between the ceramic cover plate 42 and the impeller body 41, the metal frame 43 can enhance the impact resistance of the impeller structure 4; a third adhesive layer 44 is used to connect the ceramic cover plate 42, the impeller body 41, and the impeller body 41, which can bond the ceramic cover plate 42, the impeller body 41, and the metal frame 43 of different materials together; at the same time, by providing a groove structure and a protrusion structure 42a between the ceramic third adhesive layer 44 and the ceramic cover plate 42 and the impeller body 41, the third adhesive layer 44 is used to achieve the third adhesive layer 43. The interlocking of the adhesive layer 44 with the ceramic cover plate 42 and the impeller body 41 enhances the bonding force between the third adhesive layer 44 and the ceramic cover plate 42 and the impeller body 41. Furthermore, the protruding structure 42a is configured to have at least a partially increased outer diameter along the protruding direction, so that the third adhesive layer 44 forms an inverted mechanical interlock with the impeller body 41 and the ceramic cover plate 42, which can increase the bonding force between the third adhesive layer 44 and the impeller body 41 and the ceramic cover plate 42 and prevent the ceramic cover plate 42 and the impeller body 41 from separating from the third adhesive layer 44.

[0071] It should be understood that the ceramic cover plate 42 and the impeller body 41 can be made of silicon carbide ceramic, silicon nitride ceramic, silicon nitride composite silicon carbide ceramic, alumina ceramic, and zirconium oxide ceramic, etc.; the metal frame 43 can be made of cast iron, stainless steel, etc.; the third adhesive layer 44 can be formed by curing epoxy resin, curing phenolic resin, or a mixture of epoxy resin and phenolic resin with other components. It should be understood that the metal frame 43 can be a support formed by splicing metal plates and metal connecting rods, and the support can be annular or have a shape adapted to the impeller body 41, etc.

[0072] It should be understood that the outer diameter of the protruding structure 42a can gradually increase along the protruding direction, such as a frustum or a trapezoid, or it can increase at least partially along the protruding direction, such as a stepped cylinder or a mushroom structure.

[0073] To strengthen the structural strength of the edges of the ceramic cover plate 42 and limit the further propagation of cracks, therefore, as follows: Figure 22 and Figure 23 As shown, in one embodiment, a plurality of first grooves 41a and a plurality of first protrusions 425 are provided between the outer edge of the ceramic cover plate 42 and the impeller body 41. The first protrusions 425 are fitted into the first grooves 41a, and the plurality of first grooves 41a and the plurality of first protrusions 425 are spaced apart along the circumference of the ceramic cover plate 42.

[0074] The ceramic cover plate 42 and the impeller body 41 are engaged by the first groove 41a and the first protrusion 425, which can restrict the relative movement of the ceramic cover plate 42 to the impeller body 41 in the circumferential direction. At the same time, the multiple first grooves 41a and the multiple first protrusions 425 are distributed at intervals in the circumferential direction of the ceramic cover plate 42, which can form a structure with concave and convex distribution in the circumferential direction of the ceramic cover plate 42 and the impeller body 41. This structure can prevent cracks from spreading in the circumferential direction.

[0075] It should be understood that a first protrusion 425 can be formed on the ceramic cover plate 42, and a first groove 41a can be formed on the impeller body 41; alternatively, a first groove 41a can be formed on the ceramic cover plate 42, and a protrusion can be formed on the impeller body 41; or the ceramic cover plate 42 can simultaneously form both a first groove 41a and a first protrusion 425, and the impeller body 41 can form a first protrusion 425 and a first groove 41a corresponding to the ceramic cover plate 42. The number of first grooves 41a and first protrusions 425 can be two, three, four, five, six, seven, or eight, etc. Specifically, in one embodiment, eight first grooves 41a are formed on the outer edge of the impeller body 41, extending circumferentially along the impeller body 41. The ceramic cover plate 42 is disposed on the eight first protrusions 425 relative to the eight first grooves 41a, and the eight first protrusions 425 respectively fit into the eight first grooves 41a. It should be understood that the first groove 41a can be elongated or arc-shaped, etc. Specifically, in one embodiment, the first groove 41a is arc-shaped.

[0076] It should be understood that the ceramic cover plate 42 can be a one-piece molded structure, or it can be formed by splicing together multiple plates 421. Specifically, for example... Figure 22 As shown, in one embodiment, the ceramic cover plate 42 includes a plurality of plates 421 arranged circumferentially along the impeller structure 4. Adjacent plates 421 are abutted by a labyrinth structure 422, and the labyrinth structure 422 is radially continuously bent along the impeller body 41. The outer edges of the plurality of plates 421 are formed with eight first protrusions 425, and the outer edges of the impeller body 41 are formed with first grooves 41a.

[0077] In this embodiment, by setting the ceramic cover plate 42 as a multiple plate body 421 spliced ​​together, the size of the minimum processing unit of the ceramic cover plate 42 can be reduced. A large ceramic cover plate 42 can be formed by splicing multiple small-sized plate bodies 421, reducing the processing difficulty. At the same time, by setting multiple ceramic cover plates 42, when the ceramic cover plate 42 forms a crack and extends circumferentially, the crack will not extend to the hopper plate body 421 due to the splicing, thus limiting the extension of the crack along the circumferential direction of the ceramic cover plate 42. In addition, by using a labyrinth structure 422 for interlocking between adjacent plate bodies 421, and the labyrinth structure 422 is continuously bent radially along the impeller body 41, a labyrinth structure can be formed between adjacent plate bodies 421, preventing the slurry from flowing into the ceramic cover plate 42 and improving the wear resistance of the ceramic cover plate 42.

[0078] It should be understood that the labyrinth structure 422 can be a side that is continuously bent radially along the impeller body 41, a sawtooth side, a wavy side, etc.

[0079] Planar bonding relies solely on interfacial shear force, and independent ceramic protrusions without a frame anchorage are prone to stress concentration and breakage. In order to further enhance the overall strength of the impeller structure, in one embodiment, at least a portion of the protrusion structure 42a in the impeller body 41 and / or ceramic cover plate 42 is embedded in a metal frame 43 and connected to the metal frame 43 via a third adhesive layer 44.

[0080] In this embodiment, by setting a protruding structure 42a and embedding the protruding structure 42a into the metal frame 43, and filling the gap between the protruding structure 42a and the metal frame 43 with the third adhesive layer 44, the protruding structure 42a is embedded into the metal frame 43 to form a mortise and tenon structure, which can connect the ceramic cover plate 42 and the metal frame 43 into a whole, so that the impact on the ceramic cover plate 42 can be directly transmitted to the metal frame 43 and diffused outward through the metal frame 43, avoiding the ceramic cover plate 42 bearing the impact alone, and improving the bonding strength between the ceramic cover plate 42 and the metal frame 43. At the same time, the protruding structure 42a can also position the metal frame 43 and the ceramic cover plate 42.

[0081] To simultaneously strengthen the bond strength between the ceramic cover plate 42, the third adhesive layer 44, and the metal skeleton 43, and to enhance the shear strength of the ceramic cover plate 42, therefore, as follows: Figure 25As shown, in one embodiment, the ceramic cover plate 42 has a protruding structure 42a, which includes a second protrusion 423 and a third protrusion 424. The dimensions of the second protrusion 423 and the third protrusion 424 are at least partially increased along the protrusion direction, and the height of the third protrusion 424 is higher than the height of the second protrusion 423. A metal frame 43 is provided with an opening 43a relative to the third protrusion 424, and the metal frame 43 is fitted onto the third protrusion 424 through the opening 43a. A third adhesive layer 44 covers the second protrusion 423 and is also disposed in the gap between the opening 43a and the third protrusion 424. The second protrusion 423, the third protrusion 424, and the third adhesive layer 44 are fitted together using a first concave-convex structure.

[0082] In this embodiment, the second protrusion 423 is fitted with the third adhesive layer 44, which can provide a large-area bonding and disperse shear stress. The third protrusion 424 cooperates with the opening 43a of the metal skeleton 43 to form a rigid tenon and mortise anchor, resisting pull-out failure caused by centrifugal force and restricting the ceramic cover plate 42 from detaching from the third adhesive layer 44 along the impeller axis. At the same time, the third protrusion 424 directly transfers the load to the metal skeleton 43, avoiding local stress concentration in the ceramic cover plate 42.

[0083] like Figure 23 As shown, in one embodiment, the impeller body 41 includes two spaced-apart end plates 411 and a plurality of blades 412 disposed between the two end plates 411. The end plates 411 are connected to the ceramic cover plate 42 and the metal frame 43 via a third adhesive layer 44, and one end plate 411 has an intake port. The two end plates 411 are respectively connected to the two blades 412 on both sides and are distributed circumferentially along the end plates 411. A plurality of inter-blade flow channels 41c are formed between the blades 412, and one end of each inter-blade flow channel 41c is connected to the intake port 41b. The outer edge of the end plate 411 has a first groove 41a that mates with the first protrusion 425.

[0084] Specifically, when the impeller body 41 is working, it rotates at high speed. The rotating impeller body 41 forms a negative pressure suction force, which draws the slurry in from the suction port 41b. After the slurry enters the impeller body 41, it is pushed out between the blades 412 by the blades 412, thus realizing the pumping of the slurry. The blades 412 are located between the two end plates 411, which can avoid the blades 412 directly bearing the impact of the slurry. By setting ceramic cover plates 42 on the outside of the two end plates 411, the wear resistance of the ends of the end plates 411 can be strengthened, and the overall impact resistance of the impeller structure 4 can be enhanced.

[0085] To enhance the bonding strength between the end plate 411 and the third adhesive layer 44, therefore, as follows: Figure 25As shown, in one embodiment, a protruding structure 42a is formed on one side of the end plate 411 opposite to the ceramic cover plate 42. The protruding structure 42a includes a plurality of fourth protrusions 413, which are distributed at intervals along the circumference and radial direction of the end plate 411. The plurality of fourth protrusions 413 are all arranged along the circumference of the ceramic cover plate 42. The edges of the fourth protrusions 413 have sharp serrations, and a grid-like three-dimensional groove is formed between the plurality of fourth protrusions 413. The depth-to-width ratio of the grid-like three-dimensional groove is 1-1.2:1. The fourth protrusions 413 and the third adhesive layer 44 combine to form a first concave-convex structure, and the depth-to-width ratio of the grid-like three-dimensional groove is 1-1.2:1.

[0086] The serrated edge of the fourth protrusion 413 penetrates into the third adhesive layer 44 and forms a barbed structure with the third adhesive layer 44, which can improve the peel resistance between the end plate 411 and the third adhesive layer 44. The adhesive enters the gap between the fourth protrusion 413 and forms a three-dimensional grid structure with corresponding grid grooves after curing, which can effectively increase the bonding area.

[0087] like Figure 23 As shown, in one embodiment, the outer diameter of the fourth protrusion 413 gradually increases along the protrusion direction, and the two ends of the fourth protrusion 413 along the rotation direction of the impeller are set at an angle, and the angle is less than 30°.

[0088] The outer diameter of the fourth protrusion 413 gradually increases, making it an inverted frustum or mushroom shape. After the adhesive fills the gaps between the fourth protrusions 413, it can form an inverted hanging structure that matches the fourth protrusion 413, restricting the separation of the fourth protrusion 413 from the third adhesive layer 44. When the impeller body 41 rotates counterclockwise, the end plate 411 bears a force opposite to the rotation direction of the impeller body 41. Therefore, in this embodiment, the first and last ends of the fourth protrusion 413 along the rotation direction of the impeller are set at an angle, and the angle is less than 30°, so that the angle of the fourth protrusion 413 facing the rotation direction of the impeller forms two intersecting surfaces. The two intersecting surfaces can share the force along the rotation direction of the impeller body 41, which can restrict the rotation of the end plate 411 and the third adhesive layer 44 relative to the ceramic cover plate 42, and enhance the torsional strength between the end plate 411, the third adhesive layer 44, and the ceramic cover plate 42.

[0089] It should be understood that the metal frame 43 can be independently disposed at both ends of the impeller body 41, or it can penetrate through the impeller body 41. Specifically, for example... Figure 23As shown, in one embodiment, the blade 412 has a channel 41d that passes through the blade 412 and the two end plates 411; there are two ceramic cover plates 42, which are disposed at both ends of the impeller body 41; the metal frame 43 includes two fixing plates 431 and multiple connectors 432. The two fixing plates 431 are disposed at both ends of the impeller and between the ceramic cover plates 42 and the end plates 411. The multiple connectors 432 connect the two fixing plates 431 and pass through the channel 41d.

[0090] In this embodiment, the connector 432 passes through the blade 412 and the end plate 411 via the channel 41d, so that both ends of the impeller body 41 are provided with metal frames 43, and the metal frames 43 at both ends form an integral structure, which enhances the overall impact resistance and torsional strength of the impeller body 41. At the same time, since the connector 432 passes through the blade 412 via the channel 41d, it can strengthen the weak part of the blade 412 in the impeller body 41, enhance the impact resistance of the blade 412, and prevent the blade 412 from breaking due to impact. The connector 432 can be connected to the two fixing plates 431 by welding, screws, or other means; the connector 432 can be a connecting rod, connecting rope, connecting block, or connecting strip, etc.

[0091] Because the blade 412 is a three-dimensional structure, the impeller has a certain degree of torsion along the direction near the center of the impeller, causing the blade 412 to not be arranged along the axial direction of the impeller. However, multiple connectors 432 are fixed to the fixing plate 431, and the multiple connectors 432 can only pass through the blade 412 in the same direction. To prevent the connectors 432 from passing through the blade 412 between the two end plates 411, the size of the channel 41d needs to be increased. Increasing the size of the channel 41d will reduce the thickness of the blade 412. In order to balance the thickness of the blade 412 and the passage of the connectors 432, therefore, as follows... Figure 27 As shown, in one embodiment, the cross-sectional area of ​​the blade 412 gradually decreases along the direction close to the center of the end plate 411; the connector 432 includes an arc-shaped first reinforcing piece 4321 and a second reinforcing piece 4322, the first reinforcing piece 4321 and the second reinforcing piece 4322 are arranged along the axial direction of the end plate 411, the first reinforcing piece 4321 passes through the channel 41d and connects the two end plates 411, the second reinforcing piece 4322 is inserted into the channel 41d, and the second reinforcing piece 4322 is located on the side of the first reinforcing piece 4321 close to the center of the end plate 411, and the height of the second reinforcing piece 4322 along the axial direction of the end plate 411 is lower than the height of the first reinforcing piece 4321.

[0092] In this embodiment, by gradually reducing the cross-sectional area of ​​the blade 412 near the center of the end plate 411, the peripheral wall of the blade 412 becomes streamlined from the inside out, and the cross-sectional area decreases near the suction port 41b, thus reducing the flow resistance applied to the fluid. By providing a first reinforcing plate 4321 and a second reinforcing plate 4322, which pass through the blade 412 and are then injected with adhesive into the channel 41d, and after the adhesive cures, the first and second reinforcing plates 4321 and 4322 form an integral structure with the blade 412. When the blade 412 is subjected to impact, the impact can be transmitted to other parts via the first and second reinforcing plates 4321 and 4322, preventing localized impact on the blade 412. The blade 412 is thick enough in the direction away from the impeller center, while the thickness of the blade 412 in the direction closer to the impeller center is smaller. In this embodiment, the first reinforcing plate 4321 and the second reinforcing plate 4322 are set to different sizes. Both the first reinforcing plate 4321 and the second reinforcing plate 4322 can be inserted into the channel 41d along the axial direction of the impeller, which solves the problem that the connecting piece 432 cannot pass through the impeller body 41 in the same direction. At the same time, the first reinforcing plate 4321 passes through the impeller and the second reinforcing plate 4322 is inserted into the channel 41d, and only penetrates a limited distance. This can strengthen the blade 412 while preventing the blade 412 from passing through the two end plates 411.

[0093] In another embodiment, both fixing plates 431 are provided with connectors 432. In the same channel 41d, the connectors 432 of the two fixing plates 431 are both located in the channel 41d, and the connectors 432 are both first reinforcing pieces 4321 and second reinforcing pieces 4322. The first reinforcing pieces 4321 and second reinforcing pieces 4322 are arranged along the axial direction of the end plate 411. The second reinforcing piece 4322 is inserted into the channel 41d, and the second reinforcing piece 4322 is located on the side of the first reinforcing piece 4321 near the center of the end plate 411. Along the axial direction of the end plate 411, the height of the second reinforcing piece 4322 is lower than the height of the first reinforcing piece 4321. The connectors 432 on the two fixing plates 431 are arranged one-to-one, and the first reinforcing pieces 4321 on the two fixing plates 431 are fixedly connected. Along the torsion direction of the blade 412, the first reinforcing pieces 4321 and second reinforcing pieces 4322 on the two reinforcing plates are staggered.

[0094] In this embodiment, by providing connectors 432 on both sides of the channel 41d of the two impeller bodies 41, the connectors 432 can be inserted into the channel 41d along both sides. When multiple connectors 432 are inserted into the channel 41d in the same direction, the insertion depth of a single first reinforcing plate 4321 and a single second reinforcing plate 4322 into the channel 41d can be reduced, thus reducing the required thickness of the channel 41d. Furthermore, the blades 412 are provided with second reinforcing plates 4322 on both sides near the impeller center, which can strengthen both the upper and lower sides of the blades 412. Moreover, the first reinforcing plates 4321 on the two fixing plates 431 can be connected to form a whole. The first reinforcing plates 4321 and second reinforcing plates 4322 on the two reinforcing plates are staggered, so that the first reinforcing plates 4321 and second reinforcing plates 4322 adapt to the twisting direction of the blades 412, allowing the first reinforcing plates 4321 and second reinforcing plates 4322 located at both ends of the channel 41d to be inserted smoothly.

[0095] It should be understood that, in order to achieve the fit between the opening 43a of the metal skeleton 43 and the third protrusion 424, specifically, as follows: Figure 27 As shown, in one embodiment, the two fixing plates 431 have multiple openings 43a, and the first reinforcing plate 4321 has multiple third fixing holes 43b. Some of the openings 43a are for the third protrusion 424 to pass through, while the other openings 43a and the third fixing holes 43b are for adhesive to pass through, so that the adhesive is interspersed with the fixing plates 431, enhancing the bonding strength between the fixing plates 431 and the third adhesive layer 44. Furthermore, the second reinforcing plates 4322 located on the two fixing plates 431 can be connected by adhesive injected into the channel 41d. The adhesive passes through the third fixing holes 43b on the two reinforcing plates, so that the two fixing plates 431 are combined into one unit, restricting the misalignment between the two fixing plates 431.

[0096] Secondly, this utility model also provides a delivery pump, including the aforementioned ceramic-metal composite structure. For example... Figure 1 As shown, in one embodiment, the pump further includes a pump housing structure 5, which includes a detachably connected front pump housing 51 and a rear pump housing 52, forming a pump chamber between the front pump housing 51 and the rear pump housing 52. The front pump housing 51 has an inlet for fluid to enter the pump chamber. A metal front guard plate 12 is detachably connected to the front pump housing 51, and a metal rear guard plate 13 is detachably connected to the rear pump housing 52. It should be understood that the metal front guard plate 12 and the front pump housing 51, and the metal rear guard plate 13 and the rear pump housing 52 can all be detachably connected using bolts, screws, and clips.

[0097] In this embodiment, the pump housing structure 5 is configured as a detachable front pump housing 51 and a rear pump housing 52. When it is necessary to replace the flow-through component, the rear pump housing 52 is separated from the front pump housing 51, and then the ceramic and metal composite structure can enter the area formed by the front pump housing 51 and the rear pump housing 52. Then, the metal rear guard plate 13 in the ceramic and metal composite structure is connected to the rear pump housing 52, and the metal front guard plate 12 is connected to the front pump housing 51, thus realizing the connection between the ceramic and metal composite structure and the pump housing structure 5.

[0098] like Figure 1 As shown, in one embodiment, the rear pump housing 52, the metal rear guard plate 13, and the ceramic rear guard plate 23 are provided with mounting holes. The pump also includes a transmission structure 6. The housing of the transmission structure 6 is connected to the rear pump housing 52 by bolts. The transmission shaft of the transmission mechanism is threadedly connected to the end plate 411 of the impeller that is away from the suction port 41b. The transmission shaft passes through the mounting holes of the rear pump housing 52, the metal rear guard plate 13, and the ceramic rear guard plate 23. The transmission shaft is sealed to the rear pump housing 52, the metal rear guard plate 13, and the ceramic rear guard plate 23 by fitting together.

[0099] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A ceramic-metal composite structure, characterized in that, include: A metal structure includes a metal volute, a metal front guard plate, and a metal rear guard plate, wherein the metal front guard plate and the metal rear guard plate are respectively disposed at both ends of the metal volute and are detachably connected to the metal volute. A ceramic structure includes a ceramic volute, a ceramic front guard plate, and a ceramic rear guard plate. The ceramic volute is housed within a metal volute. The ceramic front guard plate and the ceramic rear guard plate are respectively disposed between the metal front guard plate and the metal rear guard plate, and together with the ceramic volute, form a vortex chamber. An adhesive structure is provided between the metal volute and the ceramic volute, between the metal front guard plate and the ceramic front guard plate, and between the metal rear guard plate and the ceramic rear guard plate. The adhesive structure and the ceramic volute, the ceramic front guard plate and the ceramic rear guard plate are provided with a concave-convex structure that fits in through grooves and protrusions.

2. The ceramic-metal composite structure according to claim 1, characterized in that, The outer diameter of the protrusion increases at least locally along the protrusion direction.

3. The ceramic-metal composite structure according to claim 1, characterized in that, The metal volute is hollow inside and has first through holes at both ends; Both the front metal guard plate and the rear metal guard plate have an end face that abuts against the end of the metal volute and a cylindrical surface that fits against the inner wall of the first through hole, and the cylindrical surface is perpendicular to the end face.

4. The ceramic-metal composite structure according to claim 1, characterized in that, The metal volute has a cavity, and the outer wall of the metal volute has an installation channel that communicates with the cavity; The ceramic volute includes multiple inner lining components, which are spliced ​​together to form an inner liner that fits with the inner wall of the metal volute. The size of each inner lining component is set to be smaller than the inner diameter of the mounting channel, so that the inner lining component can enter the cavity through the mounting channel. The adhesive structure includes a first adhesive layer, which is disposed between the inner liner and the inner wall of the cavity.

5. The ceramic-metal composite structure according to claim 1, characterized in that, The ceramic front guard plate includes: A panel component, disposed on one side of the metal front guard plate, and having a second through hole; and A hollow shaft is coaxially arranged with the second through hole. The hollow shaft has a boss structure that cooperates with the metal front guard plate. The boss structure is used to restrict the movement of the hollow shaft in the direction close to the panel. The adhesive structure includes a second adhesive layer, which is disposed between the metal front guard plate and the panel piece and is fitted with the panel piece using a concave-convex structure. The second adhesive layer is also disposed between the hollow shaft and the metal front guard plate.

6. The ceramic-metal composite structure according to claim 1, characterized in that, It also includes an impeller structure, which comprises: Impeller body; A ceramic cover plate is disposed at the end of the impeller body; A metal frame is embedded in the impeller body and disposed between the impeller body and the ceramic cover plate; and The third adhesive layer connects the metal frame, the impeller body, and the ceramic cover plate. The third adhesive layer, the ceramic cover plate, and the impeller body are provided with a groove structure and a protrusion structure that fit together. The outer diameter of the protrusion structure increases at least partially along the protrusion direction.

7. The ceramic-metal composite structure according to claim 6, characterized in that, The ceramic cover plate includes multiple plates arranged circumferentially along the impeller body. Adjacent plates are joined by a labyrinth structure, and the labyrinth structure is continuously bent radially along the impeller body.

8. The ceramic-metal composite structure according to claim 6, characterized in that, The impeller body includes: Two spaced-apart end plates, the end plates being connected to the ceramic cover plate and the metal frame via the third adhesive layer; and Multiple blades are disposed between the two end plates, with each blade connected to one of the two end plates on its two sides and distributed at intervals along the circumference of the end plates; the cross-sectional area of ​​the blades gradually decreases along the direction closer to the center of the end plates. The metal frame includes two fixing plates and multiple connectors. The two fixing plates are disposed at both ends of the impeller body and between the ceramic cover plate and the end plate. The connectors include a first reinforcing plate and a second reinforcing plate that are arc-shaped and arranged along the axial direction of the end plate. The first reinforcing plate passes through the blade and connects the two end plates. The second reinforcing plate is embedded in the blade and is located on the side of the first reinforcing plate closer to the center of the end plate. The height of the second reinforcing plate along the axial direction of the end plate is lower than the height of the first reinforcing plate.

9. A delivery pump, characterized in that, Including the ceramic-metal composite structure as described in any one of claims 1-8.

10. The delivery pump according to claim 9, characterized in that, It also includes a pump housing structure, which includes a detachably connected front pump housing and a rear pump housing, with a pump chamber formed between the front pump housing and the rear pump housing; The metal front guard plate is detachably connected to the front pump housing, and the metal rear guard plate is detachably connected to the rear pump housing.

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