Composite material for ultra-high-speed submersible pump and preparation method of composite material

Abstract

The composite material is a polymer composite material and is prepared from the following components in percentage by weight: 20%-40% of thermoplastic polyamide resin, 10%-25% of MC nylon particles, 5%-15% of sub-nano silicon chloride, 2%-6% of molybdenum disulfide, 3%-8% of carbon fibers and 3%-10% of silica fibers. 15%-35% of glass fiber and 0.1%-0.4% of grease. The preparation method of the composite material for the ultra-high-speed submersible pump comprises the following steps: respectively activating the surfaces of silicon nitride, molybdenum disulfide, silica fibers, carbon fibers and glass fibers by using a coupling agent, compounding and uniformly stirring silicon chloride, molybdenum disulfide, MC nylon particles, polyamide resin slices, silica fibers and grease by using a stirrer, adding a dispersing agent and a phase solvent, and uniformly stirring to obtain the composite material for the ultra-high-speed submersible pump. Double-screw equipment is applied, raw and auxiliary materials are fed from a feeding port of the double-screw equipment, carbon fibers and glass fibers are added from a middle feeding port and a side feeding port, and the polymer composite material is prepared through the double-screw equipment.

Description

Technical Field

[0001] The invention relates to the technical field of polymer composite materials, in particular to a composite material for an ultra-high-speed submersible pump and a preparation method thereof. Background Art

[0002] With the advancement of science and technology and the continuous development of the submersible pump industry towards high-speed pumps and ultra-high-speed pumps, higher requirements are constantly being placed on submersible pump materials. Ultra-high-speed submersible pump materials require high strength, high wear resistance, corrosion resistance, light weight, low water absorption, good product resilience, low production cost, high efficiency, and easy processing and molding.

[0003] The motor speed of traditional submersible pumps is below 4000 rpm, and the performance of common metals and engineering plastics PA6 and PPS basically meet the requirements for use;

[0004] However, when the speed of the submersible pump motor is greater than 6000 rpm or above, the submersible pump impeller, mouth ring and water inlet section are in a high-speed grinding state; traditional materials (such as general ordinary metals and engineering plastics PA6, PPS) may not meet the use requirements under high-speed grinding, and new high-performance materials need to be developed. Summary of the invention

[0005] The object of the present invention is to provide a composite material for an ultra-high-speed submersible pump and a preparation method thereof, so as to solve the problem raised in the above background technology that when the speed of the submersible pump motor is greater than 6000 rpm or above, the submersible pump impeller, mouth ring, and water inlet joint are all in a high-speed grinding state; traditional materials (such as general ordinary metals and engineering plastics PA6, PPS) may not meet the use requirements under the high-speed grinding state.

[0006] To achieve the above-mentioned purpose, the present invention provides a polymer composite material, which selects thermoplastic polyamide resin as the resin material, selects carbon fiber, glass fiber, and silica fiber as the resin-based material, and selects sub-nano silicon chloride and molybdenum disulfide as wear-resistant modified materials. By adding an appropriate amount of oil and fat, the water absorption rate of the composite material is reduced, and the resilience of the composite material is improved, which is beneficial to improving the sealing performance of the multi-layer impellers to the fluid.

[0007] Preferably, the polymer material is a thermoplastic polyamide resin, and the thermoplastic polyamide is polyamide 6, polyamide 66, polyamide 11, or polyamide 12.

[0008] Preferably, the polymer material resin matrix is ​​carbon fiber, glass fiber, or silica fiber.

[0009] Preferably, the coupling agent of the polymer composite material is KH550.

[0010] Preferably, the dispersant of the polymer composite material is 630R or ALL.

[0011] Preferably, the compatibilizers of the polymer composite material are SC8315 and SHSC.

[0012] Preferably, the wear-resistant modified polymer composite material is sub-nano silicon chloride, molybdenum disulfide, or lithium-based grease.

[0013] Preferably, the polymer composite material water-increasing and modified material is lithium-based grease.

[0014] The present invention provides a method for preparing a composite material for an ultra-high-speed submersible pump, which is characterized by comprising the following steps:

[0015] Step 1: Mix the silicon nitride according to claim 3, the silica fiber according to claim 4, and the molybdenum disulfide according to claim 5 according to the weight component ratio according to claim 1, dilute the coupling agent KH550 at a ratio of 2%-5% with pure water at a ratio of 1:5-1:25, spray the mixture on the surface of the mixture with a sprayer, stir for 0.5h, and dry it at 100℃-120℃ for 3-6h.

[0016] Step 2: Place the thermoplastic polyamide, polyamide 6, polyamide 66, polyamide 11, polyamide 1 or one or more resins described in claim 8, including MC nylon particles, into a mechanical stirring device, add the wear-resistant material configured in step 1, and then add the grease, dispersant and compatibilizer described in claim 9 for stirring. After stirring evenly, add the mixture to the feeding port of the twin-screw device.

[0017] Step 3: Add the carbon fiber described in claim 2 and the glass fiber described in claim 7 from the middle feed port and the side feed port of the twin-screw extruder, and add the weight components described in claim 1 to the feed port.

[0018] The various materials of claims 2-9 are processed and granulated according to the weight percentage of claim 1 by using a twin-screw modification device to prepare a polymer composite material.

[0019] Compared with the prior art, the invention has the following beneficial effects: the composite material for ultra-high-speed submersible pump and the preparation method thereof:

[0020] In the conventional polymer material system, we introduced highly wear-resistant silicon nitride and molybdenum disulfide ions as key modification additives;

[0021] During the material processing and molding process, these ion additives can effectively accumulate on the surface of the product and form a unique highly wear-resistant ion membrane; this ion membrane has excellent wear resistance and can significantly enhance the material's ability to withstand the strong friction generated by high-speed fluid scouring and high-speed rotation of the impeller;

[0022] Therefore, when the material is applied to flow-through parts such as pump bodies, its service life is significantly extended because the highly wear-resistant ion membrane effectively reduces material loss caused by friction and wear.

[0023] In addition, to further optimize the performance of the composite material, an appropriate amount of oil was added to the system;

[0024] The addition of oil not only reduces the water absorption of polymer composites, reduces problems such as material performance degradation and dimensional changes caused by water absorption, but also significantly improves the resilience of the composites.

[0025] This improvement is crucial to the fluid sealing performance between the multi-layer impellers, because good resilience can better ensure the close fit of the sealing surface, thereby effectively preventing fluid leakage; in addition, the medium ions in the grease can penetrate and enter the polymer ion membrane, further exerting its anti-friction and lubrication functions;

[0026] These dielectric ions form a lubricating layer inside the polymer ion membrane, further reducing the friction coefficient and friction loss, thereby improving the operating efficiency and stability of equipment such as pumps;

[0027] In summary, by adding highly wear-resistant silicon nitride, molybdenum disulfide ions and an appropriate amount of grease to polymer materials, their application in flow-through parts such as pump bodies will greatly extend their service life, improve the operating efficiency and stability of the equipment, and have important practical application value. DETAILED DESCRIPTION

[0028] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate positions or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The present invention provides a technical solution: a composite material for an ultra-high-speed submersible pump, comprising the following components: 20%-40% of thermoplastic polyamide resin, 10%-25% of MC nylon particles, 5%-15% of silicon chloride, 2%-6% of molybdenum disulfide, 3%-8% of carbon fiber, 3%-10% of silica fiber, 15%-35% of glass fiber, and 0.1%-0.4% of grease;

[0031] The carbon fiber size is set to 48K, and the wire diameter is 8-20μm; the silicon nitride is set to 800-2000 mesh; the silica fiber powder is set to 600-1200 mesh; the molybdenum disulfide is 800-2000 mesh; the MC nylon particles are monomer cast nylon, secondary modified granulation, and the molecular weight is greater than 70000; the glass fiber is 12-2-μm wire diameter; the thermoplastic polyamide is one or more of polyamide 6, polyamide 66, polyamide 11, and polyamide 12; the grease is set to lithium-based grease;

[0032] A preparation process for a composite material for an ultra-high-speed submersible pump comprises the following steps:

[0033] Step 1: Mix the silicon nitride according to claim 3, the silica fiber according to claim 4, and the molybdenum disulfide according to claim 5 according to the weight component ratio according to claim 1, and dilute the coupling agent KH550 with pure water at a ratio of 2%-5% at a ratio of 1:5-1:25, spray the mixed solution on the surface of the above mixture with a sprayer, stir for 0.5h, and dry it at 100°C-120°C for 3-6h in a dryer for activation treatment;

[0034] Step 2: Put the thermoplastic polyamide, polyamide 6, polyamide 66, polyamide 11, polyamide 1 or one or more resins as claimed in claim 8, including MC nylon particles, into a mechanical stirring device, add the wear-resistant material prepared in step 1, and then add the grease as claimed in claim 9, as well as the dispersant and the compatibilizer, stir, and add from the feeding port of the twin-screw device after stirring evenly;

[0035] Step 3: adding the carbon fiber described in claim 2 and the glass fiber described in claim 7 from the middle feeding port and the side feeding port of the twin-screw device, and adding them according to the weight components described in claim 1;

[0036] The various materials of claims 2-9 are processed and granulated according to the weight percentage of claim 1 by using a twin-screw modification device to prepare a polymer composite material.

[0037] Improved wear resistance: By adding wear-resistant materials such as silicon nitride, silica fiber and molybdenum disulfide, the wear resistance of the composite material is significantly improved, making it more suitable for use in severe wear environments;

[0038] Enhanced mechanical properties: The addition of carbon fiber and glass fiber enhances the strength and stiffness of the composite material and improves its overall mechanical properties;

[0039] Optimization of processing performance: Using twin-screw modified equipment for processing can ensure uniform mixing of various materials and improve the uniformity and stability of composite materials. At the same time, the granulation process is also convenient for subsequent processing and application;

[0040] High material utilization rate: by precisely controlling the proportion of various materials and the processing process, the raw materials can be used to the maximum extent and waste can be reduced;

[0041] Wide range of applications: This composite material has excellent wear resistance and mechanical properties, and is suitable for the manufacture of flow-through parts such as pump bodies and impellers. It can also be widely used in other fields that require wear-resistant and high-strength materials.

[0042] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A composite material for an ultra-high-speed submersible pump and a preparation method thereof, characterized in that: The composite material is made of the following components in weight percentage: 20%-40% thermoplastic polyamide resin, 10%-25% MC nylon particles, 5%-15% silicon chloride, 2%-6% molybdenum disulfide, 3%-8% carbon fiber, 3%-10% silica fiber, 15%-35% glass fiber, and 0.1%-0.4% grease. The composite material has many excellent properties such as high strength, high wear resistance, corrosion resistance, low water absorption, and excellent resilience, and can meet the performance requirements of ultra-high-speed submersible pumps when working. The silicon chloride is set to sub-nanometer level.

2. The composite material for an ultra-high-speed submersible pump according to claim 1, characterized in that: The carbon fiber size is set to 48K, and the wire diameter is 8-20 μm.

3. The composite material for an ultra-high-speed submersible pump according to claim 1, characterized in that: The silicon nitride is set to 800 mesh-2000 mesh.

4. The composite material for an ultra-high-speed submersible pump according to claim 1, characterized in that: The silica fiber powder is set to 600-1200 meshes.

5. The composite material for an ultra-high-speed submersible pump according to claim 1, characterized in that: The molybdenum disulfide has a mesh size of 800-2000.

6. The composite material for an ultra-high-speed submersible pump and the preparation method thereof according to claim 1, characterized in that: The MC nylon particles are monomer cast nylon, which is granulated by secondary modification and has a molecular weight of more than 70,000.

7. The composite material for an ultra-high-speed submersible pump and the preparation method thereof according to claim 1, characterized in that: The glass fiber has a wire diameter of 12-2 μm.

8. The composite material for an ultra-high-speed submersible pump and the preparation method thereof according to claim 1, characterized in that: The thermoplastic polyamide is one or more of polyamide 6, polyamide 66, polyamide 11 and polyamide 12.

9. The composite material for an ultra-high-speed submersible pump and the preparation method thereof according to claim 1, characterized in that: The grease is configured as lithium-based grease.

10. A method for preparing a composite material for an ultra-high-speed submersible pump according to claims 2-9, characterized in that: The steps include: Step 1: Mix the silicon nitride according to claim 3, the silica fiber according to claim 4, and the molybdenum disulfide according to claim 5 according to the weight component ratio according to claim 1, and dilute the coupling agent KH550 with pure water at a ratio of 2%-5% at a ratio of 1:5-1:25, spray the mixed solution on the surface of the above mixture with a sprayer, stir for 0.5h, and dry it at 100°C-120°C for 3-6h in a dryer for activation treatment; Step 2: Put the thermoplastic polyamide, polyamide 6, polyamide 66, polyamide 11, polyamide 1 or one or more resins as claimed in claim 8, including MC nylon particles, into a mechanical stirring device, add the wear-resistant material prepared in step 1, and then add the grease as claimed in claim 9, as well as the dispersant and the compatibilizer, stir, and add from the feeding port of the twin-screw device after stirring evenly; Step 3: adding the carbon fiber described in claim 2 and the glass fiber described in claim 7 from the middle feeding port and the side feeding port of the twin-screw device, and adding them according to the weight components described in claim 1; The various materials of claims 2-9 are processed and granulated according to the weight percentage of claim 1 by using a twin-screw modification device to prepare a polymer composite material.