Silicon carbide ceramic double volute pump body for low specific speed slurry pump

Abstract

The present invention discloses a silicon carbide ceramic double volute pump body for a low specific speed slurry pump, comprising a front metal pump casing and a rear metal pump casing fixed front and back, and an inner volute bonded to the inner cavity of the front metal pump casing and the rear metal pump casing; the inner volute comprises a silicon carbide ceramic volute body, a silicon nitride ceramic tongue block embedded at the outlet of the inner cavity of the silicon carbide ceramic volute body, a silicon nitride ceramic ring plate embedded in the flow channel on one side of the outlet of the inner cavity of the silicon carbide ceramic volute body, and a silicon nitride ceramic guard plate embedded on the rear end plate of the inner cavity of the silicon carbide ceramic volute body. The double volute pump body of the present invention adopts a structure combining a metal pump casing and a silicon carbide ceramic volute, and a silicon nitride ceramic filling part is embedded in the position of the inner cavity of the silicon carbide ceramic volute that is most susceptible to wear, so that the wear resistance of the silicon carbide ceramic volute is stronger, and the service life of the silicon carbide ceramic volute is improved under the premise of meeting the operating conditions of the pump body.

Description

Technical Field

[0001] The invention relates to a silicon carbide ceramic double volute pump body of a low specific speed slurry pump, belonging to the fields of fluid machinery and fluid power engineering. Background Art

[0002] In the mining and metallurgical industry, the conveyed medium is abrasive. Traditional metal slurry pumps are prone to wear, have a short lifespan, and have a high frequency of parts replacement, resulting in low pump efficiency and failure to meet the national development needs of energy conservation and emission reduction. Pumps with low specific speeds have the characteristics of small flow and high head. During the operation of traditional metal pump bodies, due to a series of reasons such as their structure, material, and the conveyed medium, the front guard plate and volute are worn in a short time. In severe cases, they will be worn through, resulting in leakage, affecting the normal operation of the pump.

[0003] Silicon carbide ceramics have excellent mechanical properties, excellent oxidation resistance, high wear resistance and low friction coefficient. Therefore, silicon carbide ceramic technology is applied to the slurry pump body to invent a silicon carbide ceramic double volute pump body that is easy to produce, easy to assemble and has good sealing. Summary of the invention

[0004] The purpose of the present invention is to provide a silicon carbide ceramic double volute pump body for a low specific speed slurry pump.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The silicon carbide ceramic double volute pump body of the low specific speed slurry pump of the present invention comprises a metal front pump casing and a metal rear pump casing fixed front and back, and an inner volute glued to the inner cavity of the metal front pump casing and the metal rear pump casing;

[0007] The metal front pump housing and the metal rear pump housing are fixed by bolts and nuts.

[0008] A sealing gasket is installed at the joint between the metal front pump casing and the metal rear pump casing.

[0009] The inner volute includes a silicon carbide ceramic volute body, a silicon nitride ceramic tongue block embedded at the outlet of the inner cavity of the silicon carbide ceramic volute body, a silicon nitride ceramic ring plate embedded in the flow channel on one side of the inner cavity outlet of the silicon carbide ceramic volute body, and a silicon nitride ceramic guard plate embedded on the rear end plate of the inner cavity of the silicon carbide ceramic volute body.

[0010] The inner cavity of the silicon carbide ceramic volute body adopts a single-ear or double-ear structure.

[0011] The inner walls of the metal front pump casing and the metal rear pump casing are both provided with grouting holes and exhaust holes, so as to improve the bonding firmness of the inner volute with the metal front pump casing and the metal rear pump casing respectively.

[0012] Beneficial Effects

[0013] The double volute pump body of the present invention adopts a structure combining a metal pump casing and a silicon carbide ceramic volute, and a silicon nitride ceramic filling part is embedded in the position of the silicon carbide ceramic volute cavity that is most susceptible to wear, so that the wear resistance of the silicon carbide ceramic volute is stronger. On the premise of meeting the operating conditions of the pump body, the service life of the silicon carbide ceramic volute is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the double volute pump body of the present invention.

[0016] Figure 2 It is a structural diagram of the inner volute in the double volute pump body of the present invention;

[0017] Figure 3 It is a parts diagram of a silicon nitride ceramic tongue block in a double volute pump body of the present invention;

[0018] Figure 4 It is a parts diagram of a silicon nitride ceramic ring plate in a double volute pump body of the present invention;

[0019] Figure 5 It is a parts diagram of a silicon nitride ceramic guard plate in a double volute pump body of the present invention;

[0020] In the figure, 1-silicon nitride ceramic volute, 11-silicon carbide ceramic volute body, 12-silicon nitride ceramic tongue block, 13-silicon nitride ceramic ring plate, 14-silicon nitride ceramic guard plate, 2-metal rear pump casing, 3-metal front pump casing, 4-sealing gasket, 5-bolt, 6-nut. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiment will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figure 1As shown, a silicon carbide ceramic double volute pump body of a low specific speed slurry pump of the present invention comprises a metal front pump casing 3 and a metal rear pump casing 2 fixed front and rear, and an inner volute 1 bonded to the inner cavities of the metal front pump casing 3 and the metal rear pump casing 2;

[0023] The metal front pump housing 3 and the metal rear pump housing 2 are fixed by bolts 5 and nuts 6 .

[0024] A sealing gasket 4 is installed at the joint between the metal front pump housing 3 and the metal rear pump housing 2.

[0025] like Figure 2 As shown, the inner volute 1 includes a silicon carbide ceramic volute body 11, and a silicon nitride ceramic tongue block 12 embedded at the inner cavity outlet of the silicon carbide ceramic volute body 11. Figure 3 As shown, the silicon nitride ceramic ring plate 13 is embedded in the flow channel on one side of the inner cavity outlet of the silicon carbide ceramic volute body 11, as shown in FIG. Figure 4 As shown, and the silicon nitride ceramic guard plate 14 is embedded in the rear end plate of the inner cavity of the silicon carbide ceramic volute body 11, as shown Figure 5 shown.

[0026] The inner cavity of the silicon carbide ceramic volute body 11 adopts a single-ear or double-ear structure.

[0027] The inner walls of the metal front pump casing 3 and the metal rear pump casing 2 are both provided with grouting holes and exhaust holes, so as to improve the bonding strength of the inner volute 1 to the metal front pump casing 3 and the metal rear pump casing 2 respectively.

Claims

1. A silicon carbide ceramic double volute pump body for a low specific speed slurry pump, comprising a metal front pump casing and a metal rear pump casing fixed front and rear, and an inner volute glued to the inner cavity of the metal front pump casing and the metal rear pump casing; It is characterized in that The inner volute includes a silicon carbide ceramic volute body, a silicon nitride ceramic tongue block embedded at the outlet of the inner cavity of the silicon carbide ceramic volute body, a silicon nitride ceramic ring plate embedded in the flow channel on one side of the inner cavity outlet of the silicon carbide ceramic volute body, and a silicon nitride ceramic guard plate embedded on the rear end plate of the inner cavity of the silicon carbide ceramic volute body.

2. The silicon carbide ceramic double volute pump body of a low specific speed slurry pump according to claim 1, characterized in that: The metal front pump housing and the metal rear pump housing are fixed by bolts and nuts.

3. The silicon carbide ceramic double volute pump body of a low specific speed slurry pump according to claim 1, characterized in that: A sealing gasket is installed at the joint between the metal front pump casing and the metal rear pump casing.

4. The silicon carbide ceramic double volute pump body of a low specific speed slurry pump according to claim 1, characterized in that: The inner cavity of the silicon carbide ceramic volute body adopts a single-ear or double-ear structure.

5. The silicon carbide ceramic double volute pump body of a low specific speed slurry pump according to claim 1, characterized in that: The inner walls of the metal front pump casing and the metal rear pump casing are both provided with grouting holes and exhaust holes.

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