Novel silicon nitride combined silicon carbide ceramic volute structure

Abstract

The utility model provides a novel silicon nitride combined silicon carbide ceramic volute structure which comprises a volute body, and the volute body comprises a sintered ceramic outer layer structure and a silicon nitride combined silicon carbide inner layer structure. Wherein the silicon nitride combined silicon carbide inner layer structure is formed by splicing a plurality of silicon nitride combined silicon carbide sheets; wherein a flange ring is arranged at the circular opening of the silicon nitride combined silicon carbide inner layer structure. According to the utility model, silicon nitride and silicon carbide are combined, so that the chemical corrosion resistance and the wear resistance are high, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of slurry pump, especially to a new silicon nitride combined with silicon carbide ceramic volute structure. BACKGROUND

[0002] The current silicon carbide ceramic volute structure has the following technical problems in the manufacturing process: 1. The internal part is easy to burst during the sintering process of large-volume workpieces; 2. The original sintered ceramic structure is insufficient in strength to solve the wear of large particles, and is easy to be damaged and broken during use, affecting the processing efficiency and product quality. SUMMARY

[0003] To solve the above problems, the application discloses a new silicon nitride combined with silicon carbide ceramic volute structure, which is assembled by using a split structure and uses silicon nitride combined with silicon carbide material to ensure strong chemical corrosion resistance and wear resistance and prolong service life.

[0004] The new silicon nitride combined with silicon carbide ceramic volute structure comprises a volute body, which comprises a sintered ceramic outer layer structure and a silicon nitride combined with silicon carbide inner layer structure, wherein the silicon nitride combined with silicon carbide inner layer structure is composed of a plurality of silicon nitride combined with silicon carbide pieces; and a flange ring is arranged at the circular opening of the silicon nitride combined with silicon carbide inner layer structure.

[0005] Further, one end of the silicon nitride combined with silicon carbide piece is designed with a clamping groove structure, and the other end is provided with a protrusion; every two adjacent silicon nitride combined with silicon carbide pieces are connected through clamping groove and protrusion matching.

[0006] Further, the flange ring is made of silicon nitride combined with silicon carbide structure, which can ensure the centering of the flanges on both sides and play a positioning role for all ceramic pieces during assembly.

[0007] Further, the bending part of the volute body is provided with a reinforcing layer.

[0008] Further, the thickness of the sintered ceramic outer layer structure is 20-30 mm, and the thickness of the silicon nitride combined with silicon carbide inner layer structure is 30-40 mm.

[0009] The utility model has the advantages of:

[0010] The flange ring is arranged to fix all the silicon nitride combined with silicon carbide pieces and prevent them from moving; the sintered silicon nitride combined with silicon carbide pieces are close to each other after sintering, then the sintered ceramic outer layer structure is poured and sintered, and then sent into the furnace for forming, which can effectively prevent the burst caused by stress in the furnace. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of this utility model;

[0012] Figure 2 Silicon nitride-bonded silicon carbide inner layer structure;

[0013] Figure 3 Schematic diagram of silicon nitride bonded to silicon carbide wafer Figure 1 ;

[0014] Figure 4 Schematic diagram of silicon nitride bonded to silicon carbide wafer Figure 2 ;

[0015] List of reference numerals in the attached diagram:

[0016] 1-1-Sintered ceramic outer layer structure; 1-2-Silicon nitride bonded silicon carbide inner layer structure; 1-3-Flange ring; 2-Reinforcing layer; 3-Slot; 4-Protrusion. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] like Figures 1-4 As shown, the novel silicon nitride-bonded silicon carbide ceramic volute structure of this embodiment includes a volute body, which includes a sintered ceramic outer layer structure 1-1 and a silicon nitride-bonded silicon carbide inner layer structure 1-2. The thickness of the sintered ceramic outer layer structure 1-1 is 20 mm, and the thickness of the silicon nitride-bonded silicon carbide inner layer structure is 30 mm.

[0019] The silicon nitride-bonded silicon carbide inner layer structure 1-2 is composed of several silicon nitride-bonded silicon carbide sheets; a flange ring 1-3 is provided at the circular opening of the silicon nitride-bonded silicon carbide inner layer structure 1-2; the flange ring 1-3 adopts a silicon nitride-bonded silicon carbide structure.

[0020] One end of the silicon nitride-bonded silicon carbide wafer is designed with a slot structure and the other end is provided with a protrusion; every two adjacent silicon nitride-bonded silicon carbide wafers are connected to each other by the slot 3 and the protrusion 4.

[0021] The bend of the volute body is provided with a reinforcing layer 2 to increase the strength of the structure.

[0022] In this embodiment, the use of flange rings ensures that all silicon nitride-bonded silicon carbide sheets are fixed and prevents them from shifting. By assembling the sintered silicon nitride-bonded silicon carbide sheets before casting and sintering the ceramic outer layer structure, cracking caused by stress in the furnace can be effectively prevented.

[0023] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A new silicon nitride combined silicon carbide ceramic volute structure comprising a volute body, characterized in that: The volute body comprises a sintered ceramic outer layer structure (1-1) and a silicon nitride bonded silicon carbide inner layer structure (1-2), wherein the silicon nitride bonded silicon carbide inner layer structure (1-2) is composed of a plurality of silicon nitride bonded silicon carbide pieces; wherein a flange ring (1-3) is arranged at the circular opening of the silicon nitride bonded silicon carbide inner layer structure (1-2).

2. The new silicon nitride combined with silicon carbide ceramic volute structure according to claim 1, characterized in that: One end of the silicon nitride bonded silicon carbide piece is designed with a clamping groove structure, and the other end is provided with a protrusion; every two adjacent silicon nitride bonded silicon carbide pieces are connected through the clamping groove and the protrusion.

3. The new silicon nitride combined with silicon carbide ceramic volute structure according to claim 1, characterized in that: The flange ring (1-3) is made of a silicon nitride bonded silicon carbide structure.

4. The new silicon nitride combined with silicon carbide ceramic volute structure according to claim 1, characterized in that: The bending part of the volute body is provided with a reinforcing layer (2).

5. The new silicon nitride combined with silicon carbide ceramic volute structure according to claim 1, characterized in that: The thickness of the sintered ceramic outer layer structure (1-1) is 20-30 mm, and the thickness of the silicon nitride bonded silicon carbide inner layer structure is 30-40 mm.

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