High-temperature-resistant submersible motor winding wire and preparation method thereof

Abstract

The application relates to the technical field of winding wires, and discloses a high-temperature-resistant submersible motor winding wire and a preparation method thereof. The high-temperature-resistant submersible motor winding wire comprises a wire core and a fluoroplastic insulation layer coated on the wire core; the wire core comprises, from inside to outside, a conductor formed by twisting copper wires and a polyimide film layer; a sheath layer is arranged outside the fluoroplastic insulation layer; the sheath layer comprises the following raw materials in parts by weight: polyether ether ketone 35-45 parts, polytetrafluoroethylene 20-30 parts, acrylate rubber 5-15 parts, nano inorganic filler 5-10 parts, antioxidant 0.5-1 part and inorganic fiber 3-9 parts; the melting index of the polyether ether ketone is 10-30 g / 10 min under 380 DEG C and 10 kg. Through the technical scheme, the problem of poor high-temperature resistance of the submersible motor winding wire in the related art is solved.

Description

Technical Field

[0001] This invention relates to the field of winding wire technology, specifically to a high-temperature resistant submersible motor winding wire and its preparation method. Background Technology

[0002] Winding wires are primarily used for electromagnetic energy conversion and signal transmission. They can be categorized into enameled wire, wrapped wire, extruded wire, and inorganic insulated wire, and are widely used in power equipment, household appliances, industrial motors, and transportation equipment. Among these, the winding wires of submersible motors are a critical component, and their performance directly affects the reliability and lifespan of the submersible motor.

[0003] Currently, although submersible motor windings possess excellent water resistance and insulation properties, in some high-temperature environments, such as geothermal wells and high-temperature hot water environments, the poor high-temperature resistance of the sheath layer prevents submersible motors from maintaining long-term stable operation at high temperatures, thus limiting their application range. Therefore, there is an urgent need for a submersible motor winding with superior high-temperature resistance. Summary of the Invention

[0004] This invention proposes a high-temperature resistant submersible motor winding wire and its preparation method, which solves the problem of poor high-temperature resistance of submersible motor winding wires in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a high-temperature resistant submersible motor winding wire, comprising a wire core and a fluoroplastic insulation layer covering the wire core; the wire core comprises, from the inside out, a conductor made of stranded copper wires and a polyimide film layer; a sheath layer is provided outside the fluoroplastic insulation layer;

[0007] The sheath layer comprises the following raw materials in parts by weight: 35-45 parts of polyetheretherketone, 20-30 parts of polytetrafluoroethylene, 5-15 parts of acrylate rubber, 5-10 parts of nano-inorganic filler, 0.5-1 part of antioxidant, and 3-9 parts of inorganic fiber.

[0008] The polyetheretherketone has a melt index of 10~30g / 10min at 380℃ and 10kg.

[0009] As a further technical solution, the mass ratio of polyetheretherketone, polytetrafluoroethylene, and acrylate rubber is 40:28:8~12.

[0010] In this invention, the mass ratio of polyetheretherketone, polytetrafluoroethylene, and acrylate rubber in the sheath layer is adjusted to 40:28:8~12, which further improves the high temperature resistance of the submersible motor winding wire.

[0011] As a further technical solution, the polyetheretherketone has a melt index of 14.3~22.26 g / 10 min at 380℃ and 10 kg.

[0012] In this invention, when polyetheretherketone has a melt index of 14.3~22.26 g / 10 min at 380℃ and 10 kg, it is further compounded with polytetrafluoroethylene and acrylate rubber in the sheath layer, which further improves the high temperature resistance and strength of the submersible motor winding wire.

[0013] As a further technical solution, the nano-inorganic filler includes one or more of graphite powder, silicon dioxide, talc powder, and molybdenum disulfide.

[0014] As a further technical solution, the particle size of the nano-inorganic filler is 10~50nm.

[0015] As a further technical solution, the nano-inorganic filler is a 4-carbamoylphenylboronic acid modified nano-inorganic filler.

[0016] As a further technical solution, the preparation method of the 4-carbamoylphenylboronic acid modified nano-inorganic filler includes the following steps:

[0017] 4-Carbamoylphenylboronic acid was dissolved in a solvent, and then mixed with nano-inorganic filler. The solvent was then removed to obtain 4-carbamoylphenylboronic acid modified nano-inorganic filler.

[0018] In this invention, the nano-inorganic filler of the sheath layer is modified with 4-carbamoylbenzeneboronic acid, which further improves the high temperature resistance and strength of the submersible motor winding wire.

[0019] As a further technical solution, the mass ratio of 4-carbamoylphenylboronic acid, solvent, and nano-inorganic filler is 0.5~1:50:10.

[0020] As a further technical solution, the antioxidants include hindered phenolic antioxidants and phosphite antioxidants;

[0021] The inorganic fibers include glass fibers and carbon fibers in a mass ratio of 1:9 to 9:1.

[0022] This invention also proposes a method for preparing a high-temperature resistant submersible motor winding wire, comprising the following steps:

[0023] S1. Mix the raw materials of the sheath layer to obtain a mixture;

[0024] S2. Coat the surface of the conductor formed by stranding copper wires with a polyimide film layer to obtain a wire core;

[0025] S3. Coat the surface of the wire core with the fluoroplastic insulation layer, and extrude the mixture onto the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0026] The working principle and beneficial effects of this invention are as follows:

[0027] In this invention, the high-temperature resistant submersible motor winding wire is provided with a conductor, a polyimide film layer, a fluoroplastic insulation layer, and a sheath layer from the inside out. The high-temperature resistance of the submersible motor winding wire is significantly improved by using polyetheretherketone, polytetrafluoroethylene, and acrylate rubber compounded at 380℃ and 10kg with a melt index of 10~30g / 10min, along with the remaining components. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] In the following examples and comparative examples, the glass fiber has a diameter of 10 μm and a length of 1 mm; the carbon fiber has a diameter of 5 μm and a length of 0.5 mm; the graphite powder has a particle size of 30 nm; the talc powder has a particle size of 50 nm; the silica has a particle size of 10 nm; the polytetrafluoroethylene is grade 6515; and the acrylate rubber is grade AR840.

[0030] Example 1

[0031] The high-temperature resistant submersible motor winding wire, from the inside out, includes a conductor, a polyimide film layer, a fluoroplastic insulation layer, and a sheath layer.

[0032] The sheath layer comprises the following raw materials in parts by weight: 35 parts polyetheretherketone, 20 parts polytetrafluoroethylene, 5 parts acrylic rubber, 5 parts nano-inorganic filler, 0.3 parts antioxidant 1010, 0.2 parts antioxidant 626, 2.7 parts glass fiber, and 0.3 parts carbon fiber.

[0033] Among them, the melt index of polyetheretherketone at 380℃ and 10kg is 10g / 10min (grade number 1105-7760), and the nano-inorganic filler is graphite powder and talc powder in a mass ratio of 1:1.

[0034] A method for preparing high-temperature resistant submersible motor winding wire includes the following steps:

[0035] S1. Mix the raw materials of the sheath layer to obtain a mixture;

[0036] S2. A polyimide film layer is coated on the surface of a conductor formed by stranding copper wires to obtain a wire core;

[0037] S3. A fluoroplastic insulation layer is coated on the surface of the wire core, and a mixture is extruded onto the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0038] Example 2

[0039] The high-temperature resistant submersible motor winding wire, from the inside out, includes a conductor, a polyimide film layer, a fluoroplastic insulation layer, and a sheath layer.

[0040] The sheath layer comprises the following raw materials in parts by weight: 45 parts polyetheretherketone, 30 parts polytetrafluoroethylene, 15 parts acrylic rubber, 10 parts nano-inorganic filler, 0.5 parts antioxidant 1076, 0.5 parts antioxidant 168, 0.9 parts glass fiber, and 8.1 parts carbon fiber.

[0041] Among them, the melt index of polyetheretherketone at 380℃ and 10kg is 10g / 10min (grade number 1105-7760), and the nano-inorganic filler is graphite powder;

[0042] A method for preparing high-temperature resistant submersible motor winding wire includes the following steps:

[0043] S1. Mix the raw materials of the sheath layer to obtain a mixture;

[0044] S2. A polyimide film layer is coated on the surface of a conductor formed by stranding copper wires to obtain a wire core;

[0045] S3. A fluoroplastic insulation layer is coated on the surface of the wire core, and a mixture is extruded onto the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0046] Example 3

[0047] The high-temperature resistant submersible motor winding wire, from the inside out, includes a conductor, a polyimide film layer, a fluoroplastic insulation layer, and a sheath layer.

[0048] The sheath layer comprises the following raw materials in parts by weight: 40 parts polyetheretherketone, 28 parts polytetrafluoroethylene, 7 parts acrylic rubber, 8 parts nano-inorganic filler, 0.3 parts antioxidant 1010, 0.7 parts antioxidant 626, 3 parts glass fiber, and 3 parts carbon fiber.

[0049] Among them, the melt index of polyetheretherketone at 380℃ and 10kg is 10g / 10min (grade number 1105-7760), and the nano-inorganic filler is graphite powder and silicon dioxide in a mass ratio of 1:1.

[0050] A method for preparing high-temperature resistant submersible motor winding wire includes the following steps:

[0051] S1. Mix the raw materials of the sheath layer to obtain a mixture;

[0052] S2. A polyimide film layer is coated on the surface of a conductor formed by stranding copper wires to obtain a wire core;

[0053] S3. A fluoroplastic insulation layer is coated on the surface of the wire core, and a mixture is extruded onto the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0054] Example 4

[0055] The difference between this embodiment and Embodiment 3 is only that the sheath layer includes the following raw materials in parts by weight: 40 parts of polyetheretherketone, 28 parts of polytetrafluoroethylene, 15 parts of acrylic rubber, 8 parts of nano-inorganic filler, 0.3 parts of antioxidant 1010, 0.7 parts of antioxidant 626, 3 parts of glass fiber, and 3 parts of carbon fiber.

[0056] Example 5

[0057] The difference between this embodiment and Embodiment 3 is only that the sheath layer includes the following raw materials in parts by weight: 40 parts of polyetheretherketone, 28 parts of polytetrafluoroethylene, 8 parts of acrylic rubber, 8 parts of nano-inorganic filler, 0.3 parts of antioxidant 1010, 0.7 parts of antioxidant 626, 3 parts of glass fiber, and 3 parts of carbon fiber.

[0058] Example 6

[0059] The difference between this embodiment and embodiment 5 is only that the sheath layer includes the following raw materials in parts by weight: 40 parts of polyetheretherketone, 28 parts of polytetrafluoroethylene, 12 parts of acrylic rubber, 8 parts of nano-inorganic filler, 0.3 parts of antioxidant 1010, 0.7 parts of antioxidant 626, 3 parts of glass fiber, and 3 parts of carbon fiber.

[0060] Example 7

[0061] The only difference between this embodiment and Example 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 29.64 g / 10 min (grade number 1105-7777).

[0062] Example 8

[0063] The only difference between this embodiment and Example 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 14.3 g / 10 min (grade number 1105-7781).

[0064] Example 9

[0065] The only difference between this embodiment and Example 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 22.26 g / 10 min (grade number 1105-7776).

[0066] Example 10

[0067] The only difference between this embodiment and Embodiment 9 is that the nano-inorganic filler is replaced with an equal amount of 4-carbamoylphenylboronic acid modified nano-inorganic filler;

[0068] The preparation method of 4-carbamoylphenylboronic acid modified nano-inorganic filler includes the following steps: 0.5g of 4-carbamoylphenylboronic acid is dissolved in 50g of methanol, and then 10g of nano-inorganic filler is added and mixed. The methanol is removed to obtain 4-carbamoylphenylboronic acid modified nano-inorganic filler.

[0069] Example 11

[0070] The only difference between this embodiment and Embodiment 9 is that the nano-inorganic filler is replaced with an equal amount of 4-carbamoylphenylboronic acid modified nano-inorganic filler;

[0071] The preparation method of 4-carbamoylphenylboronic acid modified nano-inorganic filler includes the following steps: dissolving 1g of 4-carbamoylphenylboronic acid in 50g of methanol, adding 10g of nano-inorganic filler and mixing, removing methanol, and obtaining 4-carbamoylphenylboronic acid modified nano-inorganic filler.

[0072] Comparative Example 1

[0073] The only difference between this comparative example and Example 3 is that the sheath layer includes the following raw materials in parts by weight: 75 parts polyetheretherketone, 8 parts nano-inorganic filler, 0.3 parts antioxidant 1010, 0.7 parts antioxidant 626, 3 parts glass fiber, and 3 parts carbon fiber.

[0074] Comparative Example 2

[0075] The only difference between this comparative example and Example 3 is that the sheath layer includes the following raw materials in parts by weight: 60 parts polytetrafluoroethylene, 15 parts acrylate rubber, 8 parts nano-inorganic filler, 0.3 parts antioxidant 1010, 0.7 parts antioxidant 626, 3 parts glass fiber, and 3 parts carbon fiber.

[0076] The mixtures obtained in Examples 1-11 and Comparative Examples 1-2 were extruded and pressed into sheets (2 mm thick) according to their respective molding processes, and cut into Type 1A samples as specified in GB / T 1040.2-2022 for high-temperature resistance testing.

[0077] The specimens were placed at 180℃ for 168 hours, and the tensile strength of the specimens before and after high-temperature treatment was tested. The rate of change of tensile strength was calculated.

[0078] Wherein, the rate of change of tensile strength = [(tensile strength before high temperature treatment - tensile strength after high temperature treatment) / tensile strength before high temperature treatment] × 100%;

[0079] Tensile strength was tested in accordance with GB / T 1040.1-2018 "Determination of tensile properties of plastics - Part 1: General rules", with a test speed of 1 mm / min.

[0080] The results are shown in Table 1 below.

[0081] Table 1 Performance Test Results

[0082]

[0083] Compared with Comparative Examples 1-2, the tensile strength variation rate of the sheath layer of the submersible motor winding wire prepared in Examples 1-11 is smaller, indicating that the sheath layer of the high-temperature resistant submersible motor winding wire is made of polyetheretherketone, polytetrafluoroethylene, and acrylate rubber with a melt index of 10-30 g / 10 min, which significantly improves the high-temperature resistance of the submersible motor winding wire.

[0084] Compared with Examples 3-4, the tensile strength variation rate of the sheath layer of the submersible motor winding wire prepared in Examples 5-6 is smaller, indicating that adjusting the mass ratio of polyetheretherketone, polytetrafluoroethylene, and acrylate rubber in the sheath layer to 40:28:8-12 further improves the high temperature resistance of the submersible motor winding wire.

[0085] Compared with Examples 6-7, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 8-9 was smaller and the tensile strength before high temperature treatment was higher. This indicates that when the melt index of polyetheretherketone at 380℃ and 10kg is 14.3~22.26g / 10min, and it is compounded with polytetrafluoroethylene and acrylate rubber in the sheath layer, the high temperature resistance and strength of the submersible motor winding wire are further improved.

[0086] Compared with Example 9, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 10-11 is smaller and the tensile strength before high temperature treatment is higher, indicating that the modification treatment of the nano-inorganic filler of the sheath layer with 4-carbamoylbenzeneboronic acid further improves the high temperature resistance and strength of the submersible motor winding wire.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high temperature resistant submersible motor winding wire, characterized by, The wire core comprises a conductor made of copper wires and a polyimide film layer, and the fluoroplastic insulation layer is provided with a sheath layer outside. The sheath layer comprises the following raw materials by weight: polyether ether ketone 35-45 parts, polytetrafluoroethylene 20-30 parts, acrylic rubber 5-15 parts, nano inorganic filler 5-10 parts, antioxidant 0.5-1 part, and inorganic fiber 3-9 parts. The polyether ether ketone has a melt index of 10-30 g / 10 min at 380℃ under a load of 10 kg. The nano inorganic filler is a 4-carbamoylphenylboronic acid modified nano inorganic filler. The preparation method of the 4-carbamoylphenylboronic acid modified nano inorganic filler comprises the following steps: After the 4-carbamoylphenylboronic acid is dissolved in a solvent, the nano inorganic filler is added and mixed, and the solvent is removed to obtain the 4-carbamoylphenylboronic acid modified nano inorganic filler. The mass ratio of the 4-carbamoylphenylboronic acid, the solvent, and the nano inorganic filler is 0.5-1:50:

10. The mass ratio of the polyether ether ketone, the polytetrafluoroethylene, and the acrylic rubber is 40:28:8-12.

2. A high temperature resistant submersible motor winding wire according to claim 1, characterized in that, The polyether ether ketone has a melt index of 14.3-22.26 g / 10 min at 380℃ under a load of 10 kg.

3. A high temperature resistant submersible motor winding wire as claimed in claim 1, wherein, The nano inorganic filler comprises one or more of graphite powder, silicon dioxide, talc powder, and molybdenum disulfide.

4. A high temperature resistant submersible motor winding wire as claimed in claim 1, wherein, The nano inorganic filler has a particle size of 10-50 nm.

5. A high temperature resistant submersible motor winding wire as claimed in claim 1, wherein, The antioxidant comprises a hindered phenolic antioxidant and a phosphite antioxidant.

6. A high temperature resistant submersible motor winding wire as claimed in claim 1, wherein, The inorganic fiber comprises glass fiber and carbon fiber in a mass ratio of 1:9-9:

1. The preparation method comprises the following steps:

7. The method according to any one of claims 1 to 6, wherein the method is characterized by, S1, mixing the raw materials of the sheath layer to obtain a mixture; S2, coating a polyimide film layer on the surface of the conductor made of copper wires to obtain a wire core; S3, coating the fluoroplastic insulation layer on the surface of the wire core, and extruding the mixture on the surface of the fluoroplastic insulation layer to obtain a high-temperature-resistant submersible motor winding wire. ​

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