Liquid metal electromagnetic pump

Abstract

The liquid metal electromagnetic pump comprises a pump core, a first sleeve and a second sleeve, the first sleeve and the second sleeve are coaxially nested, the pump core is located in the second sleeve, a heat insulation layer is further arranged between the pump core and the second sleeve, the heat insulation layer is made of inorganic materials, and the thickness of the heat insulation layer is not larger than 10 mm. Sleeve bodies of the first sleeve and the second sleeve are formed by pouring refractory castable, and mesh-shaped objects are further arranged in the sleeve bodies. According to the liquid metal electromagnetic pump, the heat insulation layer is additionally arranged between the pump core and the second sleeve, the heat insulation layer shares the heat insulation function of the second sleeve, the thickness of an existing second sleeve can be reduced by half, and the manufacturing difficulty and cost of the second sleeve are greatly reduced; meanwhile, the thickness of the second sleeve is reduced, so that the distance between the pump core and the liquid metal in the pumping channel is closer, and the pumping efficiency of the pump core is improved; the sleeve is made of refractory castable, and compared with a silicon nitride ceramic sleeve, the cost can be greatly saved; and the structural strength of the sleeve is improved by the mesh in the castable.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid metal electromagnetic pump technical field, concretely relates to liquid metal electromagnetic pump. BACKGROUND

[0002] Patent CN2023115882691 discloses a kind of liquid metal electromagnetic pump, including pump core, first sleeve and second sleeve, first sleeve and second sleeve coaxially nest, the gap between first sleeve and second sleeve constitutes pumping channel, and pump core is located in second sleeve.This kind of electromagnetic pump of configuration, coil in pump core, magnetic steel and high-temperature liquid metal with outside are only separated by the inner wall of second sleeve, which has very high requirements for the material, thickness and temperature insulation performance of second sleeve, resulting in great difficulty in manufacturing second sleeve and high processing cost.Second sleeve thickness too big will also cause that liquid metal in pump core and pumping channel is far away, and it affects the pumping efficiency of traveling wave magnetic field.In addition, sleeve is immersed in high-temperature molten state liquid metal, needs to bear high temperature, liquid metal scouring, repeated thermal shock etc., and the performance requirement of material is very high.The sleeve made of ordinary high-temperature resistant material is very easy to crack in this repeated thermal shock.At present, the industry usually uses silicon nitride material to make sleeve, but silicon nitride sleeve is difficult to process, and the price is expensive. SUMMARY

[0003] The utility model aims at providing a kind of liquid metal electromagnetic pump of low cost easy to make to solve the defects of great difficulty in manufacturing and high cost of existing electromagnetic pump.

[0004] To achieve the above-mentioned utility model purposes, the technical scheme of the utility model is as follows:

[0005] The liquid metal electromagnetic pump comprises a pump core, a first sleeve and a second sleeve. The first sleeve and the second sleeve are coaxially nested. The gap between the first sleeve and the second sleeve constitutes a pumping channel. The pump core is located in the second sleeve. There is also a thermal insulation layer between the pump core and the second sleeve. The thermal insulation layer is made of inorganic material, and the thickness of the thermal insulation layer is not greater than 10 mm. Preferably, the thickness of the thermal insulation layer is 2 mm.

[0006] Further, the thermal insulation layer is a composite thermal insulation layer, which comprises a main thermal insulation layer and an insulating layer. The insulating layer is located between the pump core and the main thermal insulation layer. The main thermal insulation layer is an aerogel film, and the insulating layer is an inorganic material woven fabric. The thickness of the aerogel film is 1 mm, and the thickness of the inorganic material woven fabric is 1 mm.

[0007] Further, the sleeve body of the first sleeve and / or the second sleeve is casted by refractory castable. The sleeve body also has a mesh inside. The mesh is an inorganic material woven fabric or a metal mesh. The metal mesh is a wire mesh or a stainless steel wire mesh.

[0008] Further, the metal mesh is a cylinder coaxial with the sleeve body, the metal mesh comprises warp threads and weft threads, and the weft threads and the warp threads are further provided with insulating sleeves for separating the warp threads and the weft threads at the interweaving positions of the weft threads and the warp threads; the weft threads are connected end to end by single metal wires, and the single metal wires are further provided with insulating sleeves for separating the two ends of the single metal wires at the end-to-end connecting positions of the single metal wires, and the insulating sleeves are inorganic material woven fabrics.

[0009] The inorganic material woven fabric is woven by at least one of glass fiber, basalt fiber and alumina fiber.

[0010] Compared with the prior art, the utility model has the beneficial technical effects that:

[0011] The liquid metal electromagnetic pump of the utility model, through increase heat insulation layer between pump core and second sleeve, with heat insulation layer share heat insulation function of second sleeve, can reduce half of the thickness of the existing second sleeve, greatly reduce the manufacturing difficulty and cost of second sleeve;

[0012] Meanwhile, the reduction of the thickness of the second sleeve also makes the liquid metal in the pump core and the pumping channel closer, improving the pumping efficiency of the pump core;

[0013] By adopting the composite heat insulation layer, the thickness of the heat insulation layer is compressed to several millimeters, further narrowing the distance between the pump core and the liquid metal in the pumping channel;

[0014] The sleeve made of refractory castable can greatly save the cost compared with the silicon nitride ceramic sleeve; the reticular mesh in the castable is used for increasing the structural strength of the sleeve;

[0015] The reticular mesh woven by metal wires can further increase the structural strength of the sleeve, and the warp threads and weft threads of the metal mesh are isolated from each other by the insulating sleeves, do not form an annular eddy current channel to generate additional loss, and do not affect the normal operation of the traveling wave electromagnetic field of the electromagnetic pump. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the liquid metal electromagnetic pump in the embodiment 1 of the utility model;

[0017] Figure 2 is a structural schematic view (front view) of the metal mesh in the embodiment 1 of the utility model;

[0018] Figure 3 is a structural schematic view (top view) of the metal mesh in the embodiment 1 of the utility model. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be described clearly and completely in combination with the drawings and specific embodiments, and the unfinished part can also be disposed by referring to the scheme disclosed in the patent CN2024228633574.

[0020] Example 1

[0021] like Figure 1 As shown, a liquid metal electromagnetic pump includes a pump core 1, a first sleeve 2, and a second sleeve 3. The first sleeve 2 and the second sleeve 3 are coaxially nested, and the gap between the first sleeve 2 and the second sleeve 3 forms a pumping channel. The pump core 1 is located in the second sleeve 3. A heat insulation layer 4, made of inorganic material and 2mm thick, is also provided between the pump core 1 and the second sleeve 3. By adding the heat insulation layer 4 between the pump core 1 and the second sleeve 3, the heat insulation function of the second sleeve 3 is shared, thus reducing the thickness of the second sleeve 3.

[0022] In a preferred embodiment, the insulation layer 4 is a composite insulation layer, comprising a main insulation layer and an insulating layer, with the insulating layer located between the pump core 1 and the main insulation layer. The main insulation layer is an aerogel film 401, and the insulating layer is an inorganic woven fabric 402. The inorganic woven fabric is woven from at least one of glass fiber, basalt fiber, and alumina fiber. The aerogel film 401 has a thickness of 1 mm, and the inorganic woven fabric 402 has a thickness of 1 mm. The aerogel film 401 primarily serves as insulation, while the inorganic woven fabric 402 serves to separate the pump core 1 from the aerogel film 401 and also helps maintain the position and shape of the aerogel film 401.

[0023] The sleeve bodies of the first sleeve 2 and the second sleeve 3 are cast from refractory castable, and the inside of the sleeve body also has a mesh to increase the structural strength of the sleeve body.

[0024] In one implementation, the mesh is a cylindrical stainless steel wire mesh coaxial with the sleeve body. For example... Figure 2 and Figure 3 As shown, the metal mesh includes warp and weft threads. The intersections of the warp and weft threads have insulating sleeves to separate them. The weft threads are formed by connecting single metal wires end-to-end, and the points where the wires meet also have insulating sleeves to separate the ends of the individual wires. These insulating sleeves are made of an inorganic woven material. The insulating sleeves isolate the warp and weft threads, preventing them from forming annular eddy current channels and thus affecting the normal operation of the electromagnetic pump's traveling wave electromagnetic field.

[0025] As another implementation method, the mesh is an inorganic woven material, which is directly woven from glass fiber, basalt fiber, alumina fiber, etc., or glass fiber, basalt fiber or alumina fiber is first woven into rope and then further woven into a mesh.

Claims

1. A liquid metal electromagnetic pump comprising a pump core, a first sleeve and a second sleeve, the first sleeve and the second sleeve being coaxially nested, a gap between the first sleeve and the second sleeve constituting a pumping channel, the pump core being located in the second sleeve, characterized in that, The heat insulation layer between the pump core and the second sleeve is made of inorganic material, and the thickness of the heat insulation layer is not greater than 10 mm.

2. The liquid metal electromagnetic pump of claim 1, wherein, The thickness of the heat insulation layer is 2 mm.

3. The liquid-metal electromagnet pump according to claim 1 or 2, characterized in that The heat insulation layer is a composite heat insulation layer, which comprises a main heat insulation layer and an insulation layer, and the insulation layer is located between the pump core and the main heat insulation layer.

4. The liquid metal electromagnetic pump of claim 3, wherein, The main heat insulation layer is an aerogel film, and the insulation layer is an inorganic material braid.

5. The liquid metal electromagnetic pump of claim 4, wherein, The thickness of the aerogel film is 1 mm, and the thickness of the inorganic material braid is 1 mm.

6. The liquid metal electromagnet pump of claim 1, wherein, The sleeve body of the first sleeve and / or the second sleeve is cast by refractory castable, and the sleeve body further comprises a mesh.

7. The liquid metal electromagnetic pump of claim 6, wherein, The mesh is an inorganic material braid or a metal mesh.

8. The liquid metal electromagnetic pump of claim 7, wherein, The metal mesh is a cylinder coaxial with the sleeve body, and the metal mesh comprises warp and weft, and the intersection of the warp and the weft further comprises an insulating sleeve for separating the warp and the weft; the weft is connected end to end by a single metal wire, and the end-to-end connection of the metal wire further comprises an insulating sleeve for separating the two ends of the single metal wire, and the insulating sleeve is an inorganic material braid.

9. A liquid metal electromagnetic pump according to claim 4, 5, 7 or 8, characterised in that, The inorganic material braid is woven by at least one of glass fiber, basalt fiber and alumina fiber.

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