A large silicon carbide ceramic impeller

Abstract

The present invention provides a large silicon carbide ceramic impeller, comprising silicon carbide ceramic and a metal skeleton structure arranged inside the silicon carbide ceramic, the silicon carbide ceramic is a split structure, the silicon carbide ceramic comprises a front cover plate ceramic block, a flow channel hub ceramic block, a flow channel front ceramic block, a flow channel rear ceramic block, a rear cover plate ceramic block and a hub ceramic block, the metal skeleton structure comprises a front cover plate metal skeleton and a metal skeleton, the front cover plate ceramic block, the front cover plate metal skeleton, the flow channel front ceramic block, the flow channel hub ceramic block, the metal skeleton, the flow channel rear ceramic block and the rear cover plate ceramic block and the hub ceramic block are sequentially connected to form an integral structure, an assembly gap is arranged between the silicon carbide ceramic and the metal skeleton, and the assembly gap is filled with a resin adhesive. The present invention provides a large silicon carbide ceramic impeller with simple installation, high connection stability and a split structure.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide ceramic pumps, in particular to a large silicon carbide ceramic impeller. Background Art

[0002] The impeller is the core component of a heavy-duty slurry pump. Using silicon carbide ceramics as the surface contact material of the impeller is an important way to improve the abrasion resistance and corrosion resistance of the impeller, which can effectively increase the service life of the impeller.

[0003] The existing Chinese invention patent with announcement number CN208073779U and titled "A large silicon carbide ceramic impeller for a heavy-duty slurry pump" discloses a large silicon carbide ceramic impeller for a heavy-duty slurry pump, which includes silicon carbide ceramics and a metal frame embedded in the silicon carbide ceramics, the metal frame includes a front cover plate, metal blades and a rear cover plate, the metal blades are sandwiched between the front cover plate and the rear cover plate, an assembly gap is left between the metal frame and the silicon carbide ceramics, and the assembly gap is filled with a resin adhesive. However, the silicon carbide ceramics and the metal frame in this technical solution are an integrated structure. When the size of the impeller to be installed is greater than 1m, if the traditional casting process is still used to form an integrated structure, the stress of the molded impeller is uneven, and it is difficult to achieve the required performance requirements.

[0004] Therefore, it is necessary to design a large silicon carbide ceramic impeller with a spliced ​​liner that is easy to produce, easy to assemble, and has a good sealing effect. Summary of the invention

[0005] The object of the present invention is to provide a large silicon carbide ceramic impeller which is simple to install, has high connection stability and adopts a split structure.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a large silicon carbide ceramic impeller, comprising silicon carbide ceramic and a metal skeleton structure arranged inside the silicon carbide ceramic, the silicon carbide ceramic is a split structure, the silicon carbide ceramic comprises a front cover plate ceramic block, a flow channel hub ceramic block, a flow channel front ceramic block, a flow channel rear ceramic block, a rear cover plate ceramic block and a hub ceramic block, the metal skeleton structure comprises a front cover plate metal skeleton and a metal skeleton, the front cover plate metal skeleton is arranged between the front cover plate ceramic block and the flow channel front ceramic block, the metal skeleton is arranged between the flow channel rear ceramic block and the flow channel rear cover plate ceramic block, the front cover plate ceramic block, the front cover plate metal skeleton, the flow channel front ceramic block, the flow channel hub ceramic block, the metal skeleton, the flow channel rear ceramic block, the rear cover plate ceramic block and the hub ceramic block are sequentially connected to form an integral structure, an assembly gap is arranged between the silicon carbide ceramic and the metal skeleton, and the assembly gap is filled with resin adhesive.

[0007] By adopting the above technical scheme, the original integrated silicon carbide ceramic structure is divided into six parts: front cover plate ceramic block, flow channel hub ceramic, flow channel front ceramic block, flow channel rear ceramic block, rear cover plate ceramic block and hub ceramic block. The six parts are fixed by setting corresponding convex and concave structures, and the metal skeleton and the front cover plate metal skeleton provide support and connection for the ceramics of each component, which further improves the stability of the impeller. The split ceramic structure is also convenient for production and processing difficulty, and the cast silicon carbide ceramic parts have high strength.

[0008] As a further configuration of the present invention, the front cover plate metal skeleton is embedded in a cavity one formed by the front cover plate ceramic block and the flow channel front ceramic block, the front cover plate ceramic block is provided with a glue hole, the front cover plate metal skeleton is provided with a plurality of glue injection holes, the glue hole is connected with the glue injection hole, the outer diameter length of the front cover plate metal skeleton is smaller than the outer diameter length of the cavity one, the axial length of the front cover plate metal skeleton is smaller than the axial length of the cavity one, a circular glue injection channel is formed around the front cover plate metal skeleton, and the glue hole, the glue injection hole and the circular glue injection channel are connected to form a first glue injection channel.

[0009] By adopting the above technical solution, glue injection is convenient and this method can improve the efficiency of glue injection, and the front cover plate metal frame is fully bonded to the front cover plate ceramic block and the front ceramic block of the flow channel, thereby improving the stability of the adhesive bonding the front cover plate metal frame to the ceramic component.

[0010] As a further configuration of the present invention, a metal skeleton is arranged in cavity two formed by the ceramic block at the rear of the flow channel and the ceramic block at the rear cover plate, and an interlocking protrusion is arranged on the metal skeleton. The ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel are respectively provided with an interlocking groove one and an interlocking groove two matching the interlocking protrusion, and the interlocking protrusion of the metal skeleton penetrates the interlocking groove one and the interlocking groove two to connect and fix the ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel.

[0011] By adopting the above technical scheme, during assembly, the metal skeleton is embedded through the ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel, so that the three components of the metal skeleton, the ceramic block at the rear of the flow channel and the ceramic block at the rear cover plate can be fixedly connected, and the embedding groove one and the embedding groove two of the ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel are of the same position and size, thereby improving the synchronization of the metal skeleton in driving the rotation of the ceramic block at the rear of the flow channel and the ceramic rotating blades at the rear cover plate to rotate, thereby improving the rotation stability and the service life of the impeller.

[0012] As a further configuration of the present invention, the embedding groove one and the embedding groove two form a transverse accommodating cavity, the length of the embedding protrusion along the radial direction of the impeller is smaller than the length of the transverse accommodating cavity along the radial direction of the impeller, and a transverse glue injection channel one is formed between the embedding protrusion and the transverse accommodating cavity, and the transverse glue injection channel one is connected to the first glue injection channel.

[0013] By adopting the above technical solution, the formed transverse injection channel 1 is connected to the first injection channel, and the adhesive forms an adhesive path in the transverse injection channel 1 and the first injection channel. The adhesive path flows through the front cover plate ceramic block, the front cover plate metal frame, the flow channel front ceramic block, the flow channel rear ceramic block and the metal frame, and solidifies the whole by gluing and curing, thereby improving the bonding stability between the components.

[0014] As a further configuration of the present invention, the glue injection hole spreads in a whirlwind shape from the center of the metal frame of the front cover plate to the edge, and the engaging protrusion is configured as an arc-shaped whirlwind-shaped protrusion.

[0015] By adopting the above technical scheme, the glue injection holes spread in a whirlwind shape from the center of the metal frame of the front cover plate to the edge. In conjunction with the glue holes of the ceramic block of the front cover plate, a glue injection passage is formed between the metal frame of the cover plate and the ceramic block of the front cover plate, thereby expanding the contact area of ​​the adhesive connection and improving the stability of the impeller adhesive connection. The embedded convex portion, embedded groove one and embedded groove two are all arranged in an arc whirlwind shape, and the rotation direction of the arc whirlwind is the same as the rotation direction of the impeller. This method can improve the tightness of the connection between the metal frame and the front and rear ceramic blocks of the flow channel hub, and along the direction of rotation of the impeller, the contact area of ​​the embedded convex groove is large, the rotation stability is high, inertial collision is not easy to occur, and the impeller rotation stability is high.

[0016] As a further configuration of the present invention, a convex tooth is provided at the end of the engaging protrusion of the metal frame, and a blocking platform is provided at the corresponding position of the engaging groove 2 and the convex tooth, and the blocking platform is arranged in an L-shape, and one side of the long side of the blocking platform blocks the convex tooth of the engaging protrusion, and a vertical glue injection channel 1 is provided between the metal frame and the front ceramic block of the flow channel along the axial direction of the impeller, and the L-shaped corner groove of the blocking platform is connected to the front cover metal frame, and a vertical glue injection channel 2 is provided between the front cover metal frame and the front ceramic block of the flow channel in the axial direction of the impeller, and the vertical glue injection channel 1, the horizontal glue injection channel 1 and the vertical glue injection channel 2 are connected.

[0017] By adopting the above technical solution, a convex tooth is arranged at the end of the engaging convex part of the metal frame, and a blocking platform is arranged at the corresponding position of the engaging groove 2 and the convex tooth. The blocking platform is arranged in an L-shape, and one side of the long side of the blocking platform blocks the convex tooth of the engaging convex part, so that a vertical glue injection channel 1 is formed between the metal frame and the ceramic block at the front of the flow channel along the axial direction of the impeller, and the L-shaped corner groove of the blocking platform is connected to the metal frame of the front cover, so that a vertical glue injection channel 2 is arranged between the metal frame of the front cover and the ceramic block at the front of the flow channel in the axial direction of the impeller. The vertical glue injection channel 1. The horizontal injection channel 1 and the vertical injection channel 2 are connected, and finally the first injection channel, the vertical injection channel 2, the horizontal injection channel 1 and the vertical injection channel 1 form an adhesive injection channel to bond and fix the front cover ceramic block, the front cover metal frame, the runner front ceramic block, the runner rear ceramic block, the rear cover ceramic block and the wheel hub ceramic block, and the adhesive forms a passage. The adhesive finally solidifies to form an integrated structure of an adhesive layer. The adhesives between the various components interact with each other to improve the bonding stability of the adhesive.

[0018] As a further configuration of the present invention, the length of the metal skeleton along the radial direction of the impeller is smaller than the length of the second cavity along the radial direction of the impeller, and a second transverse injection channel is formed between the metal skeleton and the ceramic block of the rear cover plate, and the second transverse injection channel is connected to the first vertical injection channel.

[0019] By adopting the above technical solution, the metal frame is bonded and fixed to the ceramic block at the rear of the flow channel and the ceramic block at the rear cover plate.

[0020] As a further configuration of the present invention, the flow channel hub ceramic block is clamped and fixed to the central support portion of the metal skeleton along the axial direction of the impeller, and the flow channel hub ceramic block is clamped and fixed to the boss portion of the flow channel rear ceramic block along the radial direction of the impeller.

[0021] By adopting the above technical solution, the flow channel hub ceramic block is clamped with the boss portion of the flow channel rear ceramic block through the central support portion of the metal skeleton, thereby achieving axial and radial fixation of the flow channel hub ceramic block, with ingenious design, easy assembly and high stability.

[0022] As a further configuration of the present invention, the metal frame is provided with a metal flange, and the wheel hub ceramic block is sleeved on the metal flange to press and connect the rear cover plate ceramic block and the metal frame.

[0023] By adopting the above technical solution, the wheel hub ceramic block is sleeved on the metal flange to press and connect the rear cover plate ceramic block and the metal frame, which is easy to operate and has high connection tightness.

[0024] As a further configuration of the present invention, a gap is provided between the flow channel hub ceramic block and the metal frame in the axial direction of the impeller to form a vertical glue injection channel three, and the glue injection channel three is connected to the vertical glue injection channel one.

[0025] By adopting the above technical scheme, under the condition of structural clamping and fixing, adhesive is used for bonding and fixing, which further improves the connection tightness of the flow channel hub ceramic block and improves the rotational stability of the impeller. Finally, the first glue injection channel, the vertical glue injection channel 2, the transverse glue injection channel 1, the vertical glue injection channel 1, the transverse glue injection channel 2 and the vertical glue injection channel 3 form a complete glue injection channel, and all the components in the impeller of the device are bonded and fixed. The adhesive is finally cured to form an integrated structure of an adhesive layer. The adhesives between the various components interact with each other to improve the bonding stability of the adhesive.

[0026] The beneficial effects of this program are:

[0027] 1. The large silicon carbide ceramic impeller for the heavy-duty slurry pump of the present invention adopts a split structure, which is divided from the original silicon carbide ceramic integrated structure into six parts: a front cover plate ceramic block, a flow channel hub ceramic, a flow channel front ceramic block, a flow channel rear ceramic block, a rear cover plate ceramic block and a hub ceramic block. The six parts are fixedly connected by corresponding convex and concave structures, and the metal skeleton and the front cover plate metal skeleton provide support and connection for the ceramics of each component, which further improves the stability of the impeller. The split ceramic structure is also convenient for production and processing difficulty, and the cast silicon carbide ceramic parts have high strength.

[0028] 2. The metal frame of the cover plate of the present invention is provided with glue injection holes that spread out in a whirlwind shape from the center to the edge. Together with the glue holes of the front cover plate ceramic block, a glue injection passage is formed between the metal frame of the cover plate and the front cover plate ceramic block, thereby expanding the contact area of ​​the adhesive connection and improving the stability of the impeller adhesive connection.

[0029] 3. The metal skeleton of the present invention is provided with an interlocking protrusion, and the ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel are respectively provided with an interlocking groove 1 and an interlocking groove 2 matching the interlocking protrusion. The metal skeleton connects and fixes the ceramic block at the rear of the flow channel and the ceramic block at the front of the flow channel by penetrating the interlocking groove 1 and the interlocking groove 2 through the interlocking protrusion, and the interlocking protrusion, the interlocking groove 1 and the interlocking groove 2 are all arranged in an arc-shaped cyclone shape, and the rotation direction of the arc-shaped cyclone is the same as the rotation direction of the impeller. This method can improve the connection tightness between the metal skeleton and the front and rear ceramic blocks of the flow channel hub, and with the direction of rotation of the impeller, the contact area of ​​the interlocking protrusion and the groove is large, the rotation stability is high, inertial collision is not easy to occur, and the impeller rotation stability is high.

[0030] 4. The outer diameter of the metal frame of the present invention is smaller than the outer diameter of the ceramic block of the rear cover plate, so a transverse glue injection channel 1 is radially formed between the metal frame and the ceramic block of the rear cover plate, and the outer diameter of the embedded protrusion of the metal frame is smaller than the outer diameter of the embedded groove, so there is a gap between the embedded protrusion and the embedded groove in the radial direction of the impeller, forming a transverse glue injection channel 2, and the end of the embedded protrusion of the metal frame is provided with a convex tooth, and the embedded groove 2 is provided with a blocking platform at the corresponding position of the convex tooth, and the blocking platform is set in an L shape, and one side of the long side of the blocking platform blocks the convex tooth of the embedded protrusion, so that a vertical glue injection channel 1 is formed between the metal frame and the ceramic block in front of the flow channel along the axial direction of the impeller, and the L-shaped corner groove of the blocking platform is connected to the metal frame of the front cover, so that the metal frame of the front cover and the ceramic block in front of the flow channel are in the axial direction of the impeller. A vertical glue injection channel 2 is provided, and the vertical glue injection channel 1, the transverse glue injection channel 1 and the vertical glue injection channel 2 are connected. Finally, the first glue injection channel, the vertical glue injection channel 2, the transverse glue injection channel 1 and the vertical glue injection channel 1 form an adhesive injection channel to bond and fix the front cover plate ceramic block, the front cover plate metal frame, the flow channel front ceramic block, the flow channel rear ceramic block, the rear cover plate ceramic block and the wheel hub ceramic block. The adhesive forms a passage, and the adhesive is finally solidified to form an integrated structure of an adhesive layer. The adhesives between the various components interact with each other to improve the bonding stability of the adhesive. Not only are the six ceramic components connected through the metal frame and the cover plate metal frame, but all the components of the impeller are also glued and connected through the glue injection connection passage, which synergistically improves the tightness of the impeller.

[0031] 5. The metal frame of the present invention is provided with a metal flange, and the wheel hub ceramic block is sleeved on the metal flange to press and connect the rear cover plate ceramic block and the metal frame, which is easy to operate and has high connection tightness.

[0032] 6. The flow channel hub ceramic block of the present invention is clamped with the boss portion of the flow channel rear ceramic block through the central support portion of the metal skeleton, thereby achieving axial and radial fixation of the flow channel hub ceramic block, with ingenious design, easy assembly and high stability.

[0033] 7. A gap is provided between the flow channel hub ceramic block and the metal frame in the axial direction of the impeller to form a vertical glue injection channel 3. Under the condition of structural clamping and fixing, adhesive is used for gluing and fixing, which further improves the connection tightness of the flow channel hub ceramic block and improves the rotational stability of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1This is a schematic diagram of the front structure of a large silicon carbide ceramic impeller of the present invention;

[0036] Figure 2 It is a schematic diagram of the reverse structure of the large silicon carbide ceramic impeller of the present invention;

[0037] Figure 3 It is a schematic diagram of the explosion structure of the large silicon carbide ceramic impeller of the present invention;

[0038] Figure 4 It is a schematic diagram of the half-section structure of the large silicon carbide ceramic impeller of the present invention.

[0039] In the figure, 1. silicon carbide ceramics, 2. metal skeleton structure, 3. front cover plate ceramic block, 4. flow channel hub ceramic block, 5. flow channel front ceramic block, 6. flow channel rear ceramic block, 7. rear cover plate ceramic block, 8. hub ceramic block, 9. front cover plate metal skeleton, 10. metal skeleton, 11. cavity one, 12. glue through hole, 13. glue injection hole, 14. round glue injection channel, 15. first glue injection channel, 16. cavity two, 17. embedded convex part, 18. embedded groove one, 19. embedded groove two, 20. horizontal glue injection channel one, 21. convex teeth, 22. blocking platform, 23. vertical glue injection channel one, 24. vertical glue injection channel two, 25. horizontal glue injection channel two, 26. boss, 27. metal flange, 28. vertical glue injection channel three, 29. horizontal accommodating cavity. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-4The present invention provides a large silicon carbide ceramic impeller, comprising a silicon carbide ceramic 1 and a metal skeleton structure 2 arranged inside the silicon carbide ceramic 1, wherein the silicon carbide ceramic 1 is a split structure, wherein the silicon carbide ceramic 1 comprises a front cover plate ceramic block 3, a flow channel hub ceramic block 4, a flow channel front ceramic block 5, a flow channel rear ceramic block 6, a rear cover plate ceramic block 7 and a hub ceramic block 8, wherein the metal skeleton structure 2 comprises a front cover plate metal skeleton 9 and a metal skeleton 10, wherein the front cover plate metal skeleton 9 is arranged inside the front cover plate. The metal skeleton 10 is arranged between the flow channel rear ceramic block 6 and the rear cover plate ceramic block 7, the front cover plate ceramic block 3, the front cover plate metal skeleton 9, the flow channel front ceramic block 5, the flow channel hub ceramic block 4, the metal skeleton 10, the flow channel rear ceramic block 6 and the rear cover plate ceramic block 7 and the hub ceramic block 8 are sequentially connected to form an integral structure, and an assembly gap is arranged between the silicon carbide ceramic 1 and the metal skeleton 10, and the assembly gap is filled with resin adhesive.

[0042] Specifically, the front cover plate metal skeleton 9 is embedded in the cavity 11 formed by the front cover plate ceramic block 5 and the flow channel front ceramic block 5, the front cover plate ceramic block 3 is provided with a glue hole 12, the front cover plate metal skeleton 9 is provided with a plurality of glue injection holes 13, the flow channel front ceramic block 5 is provided with a protrusion, the protrusion is embedded in the glue injection hole 13 to realize the fixed connection between the front cover plate metal skeleton 9 and the flow channel front ceramic block 5, the glue hole 12 is connected with the glue injection hole 13, the outer diameter length of the front cover plate metal skeleton 9 is smaller than the outer diameter length of the cavity 11, the axial length of the front cover plate metal skeleton 9 is smaller than the axial length of the cavity 11, and a circular glue injection channel 14 is formed around the front cover plate metal skeleton 9, the glue hole 12, the glue injection hole 13 and the circular glue injection channel 14 are connected to form a first glue injection channel 15.

[0043] Specifically, the metal skeleton 10 is arranged in the cavity 2 16 formed by the ceramic block 6 at the rear of the flow channel and the ceramic block 7 at the rear cover plate, and an interlocking protrusion 17 is arranged on the metal skeleton 10. The ceramic block 6 at the rear of the flow channel and the ceramic block 5 at the front of the flow channel are respectively provided with an interlocking groove 18 and an interlocking groove 2 19 matching the interlocking protrusion 17. The interlocking protrusion 17 of the metal skeleton 10 penetrates the interlocking groove 18 and the interlocking groove 2 19 to connect and fix the ceramic block 6 at the rear of the flow channel and the ceramic block 5 at the front of the flow channel, and the glue injection hole 13 spreads in a whirlwind shape from the center to the edge of the metal skeleton 9 of the front cover plate, and the interlocking protrusion 17 is set as an arc-shaped whirlwind-shaped protrusion.

[0044] Specifically, the interlocking groove 18 and the interlocking groove 2 19 form a transverse accommodating cavity 29, the length of the interlocking protrusion 17 along the radial direction of the impeller is smaller than the length of the transverse accommodating cavity 29 along the radial direction of the impeller, and a transverse glue injection channel 20 is formed between the interlocking protrusion 17 and the transverse accommodating cavity 29, and the transverse glue injection channel 20 is connected to the first glue injection channel 15.

[0045] Specifically, a convex tooth 21 is provided at the end of the engaging protrusion 17 of the metal skeleton 10, and a blocking platform 22 is provided at the corresponding position of the engaging groove 19 and the convex tooth 21. The blocking platform 22 is set in an L shape, and one side of the long side of the blocking platform 22 blocks the convex tooth 21 of the engaging protrusion 17. A vertical glue injection channel 23 is provided between the metal skeleton 10 and the front ceramic block 5 of the flow channel along the axial direction of the impeller. The L-shaped corner groove of the blocking platform 22 is connected to the front cover metal skeleton 10. A vertical glue injection channel 24 is provided between the front cover metal skeleton 10 and the front ceramic block 5 of the flow channel in the axial direction of the impeller. The vertical glue injection channel 23, the horizontal glue injection channel 20 and the vertical glue injection channel 24 are connected.

[0046] Specifically, the length of the metal skeleton 10 along the radial direction of the impeller is smaller than the length of the second cavity 16 along the radial direction of the impeller, and a second transverse injection channel 25 is formed between the metal skeleton 10 and the rear cover plate ceramic block 7 , and the second transverse injection channel 25 is connected to the first vertical injection channel 23 .

[0047] Specifically, the flow channel hub ceramic block 4 is clamped and fixed to the central support portion of the metal skeleton 10 along the axial direction of the impeller, and the flow channel hub ceramic block 4 is clamped and fixed to the boss 26 of the flow channel rear ceramic block 6 along the radial direction of the impeller.

[0048] Specifically, the metal frame 10 is provided with a metal flange 27 , and the hub ceramic block 8 is sleeved on the metal flange 27 to press and connect the rear cover plate ceramic block 7 and the metal frame 10 .

[0049] Specifically, a gap is provided between the flow channel hub ceramic block 4 and the metal frame 10 in the axial direction of the impeller to form a vertical glue injection channel three 28 , and the glue injection channel three is connected to the vertical glue injection channel one 23 .

[0050] Working principle: The original silicon carbide ceramic 1 integrated structure is divided into six parts: front cover plate ceramic block 3, flow channel hub ceramic, flow channel front ceramic block 5, flow channel rear ceramic block 6, rear cover plate ceramic block 7 and hub ceramic block 8. The six parts are fixed by setting corresponding convex and concave structures, and then the metal frame 10 and the front cover plate metal frame 9 provide support and connection for the ceramics of each component. A convex tooth 21 is set at the end of the embedded convex part 17 of the metal frame 10, and a blocking platform 22 is set at the corresponding position of the embedded groove 19 and the convex tooth 21. The blocking platform 22 is set to be L-shaped, and one side of the long side of the blocking platform 22 blocks the convex tooth 21 of the embedded convex part 17, so that a vertical glue injection channel 23 is formed between the skeleton and the flow channel front ceramic block 5 along the axial direction of the impeller. The L-shaped corner groove of the blocking platform 22 is connected to the front cover metal frame 10, so that A vertical glue injection channel 2 24 is arranged between the front cover metal frame 10 and the front ceramic block 5 of the flow channel in the axial direction of the impeller. The vertical glue injection channel 1 23, the transverse glue injection channel 1 20 and the vertical glue injection channel 2 24 are connected. Finally, the first glue injection channel 15, the vertical glue injection channel 2 24, the transverse glue injection channel 1 20, the vertical glue injection channel 1 23, the transverse glue injection channel 2 25 and the vertical glue injection channel 3 28 form a complete glue injection channel, which flows through the front cover plate ceramic block 3, the front cover plate metal frame 9, the flow channel front ceramic block 5, the flow channel hub ceramic block 4, the metal frame 10, the flow channel rear ceramic block 6, the rear cover plate ceramic block 7 and the hub ceramic block 8, and all the components in the impeller of the device are bonded and fixed. The adhesive is finally cured to form an integrated structure of an adhesive layer. The adhesives between the components interact with each other to improve the bonding stability of the adhesive.

[0051] Installation principle: During installation, resin adhesive is injected into the adhesive channel, and then the front cover plate ceramic block 3, the front cover plate metal frame 9, the flow channel front ceramic block 5, and the flow channel hub ceramic block 4 are glued and spliced, and then the metal frame 10 engaging protrusion 17 is embedded in the transverse accommodating cavity 29 formed by the engaging groove 18 and the engaging groove 2 19 to fix the front end part of the impeller, and then the flow channel rear ceramic block 6 and the rear cover plate ceramic block 7 are clamped and installed, and finally the hub ceramic block 8 is sleeved, glued and pressed on the metal flange 27 of the metal frame 10 to complete the assembly of the large impeller of the present invention, which is simple to operate, reduces the difficulty of production and processing, and improves the strength of ceramic casting.

[0052] The above is a detailed introduction to a large silicon carbide ceramic impeller provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A large silicon carbide ceramic impeller, characterized in that: The invention comprises a silicon carbide ceramic (1) and a metal skeleton structure (2) arranged inside the silicon carbide ceramic (1); the silicon carbide ceramic (1) is a split structure; the silicon carbide ceramic (1) comprises a front cover plate ceramic block (3), a flow channel hub ceramic block (4), a flow channel front ceramic block (5), a flow channel rear ceramic block (6), a rear cover plate ceramic block (7) and a hub ceramic block (8); the metal skeleton structure (2) comprises a front cover plate metal skeleton (9) and a metal skeleton (10); the front cover plate metal skeleton (9) is arranged between the front cover plate ceramic block (3) and the flow channel hub ceramic block (4); The metal skeleton (10) is arranged between the flow channel rear ceramic block (6) and the rear cover plate ceramic block (7); the front cover plate ceramic block (3), the front cover plate metal skeleton (9), the flow channel front ceramic block (5), the flow channel hub ceramic block (4), the metal skeleton (10), the flow channel rear ceramic block (6), the rear cover plate ceramic block (7) and the hub ceramic block (8) are sequentially connected to form an integral structure; an assembly gap is arranged between the silicon carbide ceramic (1) and the metal skeleton (10), and the assembly gap is filled with a resin adhesive; The front cover plate metal frame (9) is embedded in a cavity (11) formed by the front cover plate ceramic block (3) and the flow channel front ceramic block (5); a glue hole (12) is provided on the front cover plate ceramic block (3); a plurality of glue injection holes (13) are provided on the front cover plate metal frame (9); the glue hole (12) is connected to the glue injection hole (13); the outer diameter of the front cover plate metal frame (9) is smaller than the outer diameter of the cavity (11); the axial length of the front cover plate metal frame (9) is smaller than the axial length of the cavity (11); a circular glue injection channel (14) is formed around the front cover plate metal frame (9); the glue hole (12), the glue injection hole (13) and the circular glue injection channel (14) are connected to form a first glue injection channel (15); The metal frame (10) is arranged in the second cavity (16) formed by the flow channel rear ceramic block (6) and the rear cover plate ceramic block (7); the metal frame (10) is provided with an engaging protrusion (17); the flow channel rear ceramic block (6) and the flow channel front ceramic block (5) are respectively provided with an engaging groove 1 (18) and an engaging groove 2 (19) matching the engaging protrusion (17); the engaging protrusion (17) of the metal frame (10) penetrates the engaging groove 1 (18) and the engaging groove 2 (19) to connect and fix the flow channel rear ceramic block (6) and the flow channel front ceramic block (5); The first embedding groove (18) and the second embedding groove (19) form a transverse accommodating cavity (29); the length of the embedding convex portion (17) along the radial direction of the impeller is shorter than the length of the transverse accommodating cavity (29) along the radial direction of the impeller; a transverse glue injection channel (20) is formed between the embedding convex portion (17) and the transverse accommodating cavity (29); and the transverse glue injection channel (20) is connected to the first glue injection channel (15); The glue injection hole (13) spreads in a whirlwind shape from the center of the front cover plate metal frame (9) to the edge, and the engaging protrusion (17) is configured as an arc-shaped whirlwind-shaped protrusion.

2. The large silicon carbide ceramic impeller according to claim 1, characterized in that: A convex tooth (21) is arranged at the end of the engaging protrusion (17) of the metal frame (10); a blocking platform (22) is arranged at a position corresponding to the engaging groove (19) and the convex tooth (21); the blocking platform (22) is arranged in an L-shape; one side of the long side of the blocking platform (22) blocks the convex tooth (21) of the engaging protrusion (17); a vertical glue injection channel (23) is arranged between the metal frame (10) and the flow channel front ceramic block (5) along the axial direction of the impeller; the L-shaped corner groove of the blocking platform (22) is connected to the front cover metal frame (10); a vertical glue injection channel (24) is arranged between the front cover metal frame (10) and the flow channel front ceramic block (5) in the axial direction of the impeller; the vertical glue injection channel (23), the horizontal glue injection channel (20) and the vertical glue injection channel (24) are connected.

3. The large silicon carbide ceramic impeller according to claim 2, characterized in that: The length of the metal frame (10) along the radial direction of the impeller is shorter than the length of the second cavity (16) along the radial direction of the impeller, and a second transverse glue injection channel (25) is formed between the metal frame (10) and the rear cover plate ceramic block (7), and the second transverse glue injection channel (25) is connected to the first vertical glue injection channel (23).

4. The large silicon carbide ceramic impeller according to claim 1, characterized in that: The flow channel hub ceramic block (4) is clamped and fixed to the central support portion of the metal frame (10) along the axial direction of the impeller, and the flow channel hub ceramic block (4) is clamped and fixed to the boss (26) portion of the flow channel rear ceramic block (6) along the radial direction of the impeller.

5. The large silicon carbide ceramic impeller according to claim 4, characterized in that: The metal frame (10) is provided with a metal flange (27), and the wheel hub ceramic block (8) is sleeved on the metal flange (27) to press and connect the rear cover plate ceramic block (7) and the metal frame (10).

6. The large silicon carbide ceramic impeller according to claim 5, characterized in that: A gap is provided between the flow channel hub ceramic block (4) and the metal frame (10) in the axial direction of the impeller to form a vertical glue injection channel three (28), and the glue injection channel three is connected to the vertical glue injection channel one (23).

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