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

Abstract

The invention relates to the technical field of winding wires, and provides 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 insulating layer coated outside the wire core, the wire core sequentially comprises a conductor formed by twisting copper wires and a polyimide film layer from inside to outside; a sheath layer is arranged outside the fluoroplastic insulating layer; the sheath layer comprises the following raw materials in parts by weight: 35-45 parts of polyether-ether-ketone, 20-30 parts of polytetrafluoroethylene, 5-15 parts of acrylate rubber, 5-10 parts of a nano inorganic filler, 0.5-1 part of an antioxidant and 3-9 parts of inorganic fibers; the melt index of the polyether-ether-ketone is 10-30 g / 10 min at the temperature of 380 DEG C and the weight of 10 kg. According to the technical scheme, the problem of poor high temperature resistance of the submersible motor winding wire in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of winding wires, and in particular to a high-temperature resistant submersible motor winding wire and a preparation method thereof. Background Art

[0002] Winding wire is mainly used to achieve electromagnetic energy conversion and signal transmission. Winding wire can be divided into enameled wire, wrapped wire, extruded wire and inorganic insulated wire, etc., and is widely used in products such as power equipment, household appliances, industrial motors and transportation equipment. Among them, submersible motor winding wire is a key component of submersible motors, and its performance directly affects the reliability and service life of submersible motors.

[0003] At present, although the submersible motor winding wire has excellent water resistance and insulation performance, in some high-temperature environments, such as geothermal wells and high-temperature hot water environments, the submersible motor cannot maintain long-term stable operation under high temperatures due to the poor high-temperature resistance of the sheath layer of the submersible motor winding wire, which limits the application scope of the submersible motor. Therefore, there is an urgent need for a submersible motor winding wire with excellent high-temperature resistance. Summary of the invention

[0004] The present invention provides a high-temperature resistant submersible motor winding wire and a preparation method thereof, which solves the problem of poor high-temperature resistance of the submersible motor winding wire in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a high temperature resistant submersible motor winding wire, comprising a wire core and a fluoroplastic insulation layer coated outside the wire core; the wire core comprises a conductor formed by twisting copper wires and a polyimide film layer in sequence from the inside to the outside; a sheath layer is arranged outside the fluoroplastic insulation layer; 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 acrylic rubber, 5-10 parts of nano inorganic filler, 0.5-1 part of antioxidant, and 3-9 parts of inorganic fiber; The polyetheretherketone has a melting index of 10-30 g / 10 min at 380° C. and 10 kg.

[0006] As a further technical solution, the mass ratio of polyetheretherketone, polytetrafluoroethylene and acrylic rubber is 40:28:8-12.

[0007] In the present invention, the mass ratio of polyetheretherketone, polytetrafluoroethylene and acrylic rubber in the sheath layer is adjusted to 40:28:8-12, thereby further improving the high temperature resistance of the submersible motor winding wire.

[0008] As a further technical solution, the melt index of the polyetheretherketone at 380° C. and 10 kg is 14.3-22.26 g / 10 min.

[0009] In the present invention, when the melting index of polyetheretherketone at 380°C and 10kg is 14.3-22.26g / 10min, it is compounded with polytetrafluoroethylene and acrylic rubber in the sheath layer, thereby further improving the high temperature resistance and strength of the submersible motor winding wire.

[0010] As a further technical solution, the nano inorganic filler includes one or more of graphite powder, silicon dioxide, talcum powder, and molybdenum disulfide.

[0011] As a further technical solution, the particle size of the nano inorganic filler is 10-50 nm.

[0012] As a further technical solution, the nano inorganic filler is a 4-carbamoylphenylboronic acid modified nano inorganic filler.

[0013] As a further technical solution, the preparation method of the 4-carbamoylphenylboronic acid modified nano inorganic filler comprises the following steps: After dissolving 4-carbamoylphenylboronic acid in a solvent, adding a nano inorganic filler and mixing, removing the solvent, and obtaining a 4-carbamoylphenylboronic acid modified nano inorganic filler.

[0014] In the present invention, the nano inorganic filler of the sheath layer is modified with 4-carbamoylphenylboric acid, thereby further improving the high temperature resistance and strength of the submersible motor winding wire.

[0015] As a further technical solution, the mass ratio of the 4-carbamoylphenylboric acid, the solvent and the nano inorganic filler is 0.5-1:50:10.

[0016] As a further technical solution, the antioxidant includes hindered phenol antioxidants and phosphite antioxidants; The inorganic fibers include glass fibers and carbon fibers in a mass ratio of 1:9 to 9:1.

[0017] The present invention also provides a method for preparing a high temperature resistant submersible motor winding wire, comprising the following steps: 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 formed by twisting the 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.

[0018] The working principle and beneficial effects of the present invention are: In the present 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 in sequence from the inside to the outside, wherein polyetheretherketone, polytetrafluoroethylene and acrylate rubber with a melting index of 10-30g / 10min at 380°C and 10kg are compounded, and the remaining components are used as the raw materials of the sheath layer, which significantly improves the high temperature resistance of the submersible motor winding wire. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the following embodiments and comparative examples, the diameter of the glass fiber is 10 μm and the length is 1 mm; the diameter of the carbon fiber is 5 μm and the length is 0.5 mm; the particle size of the graphite powder is 30 nm; the particle size of the talc powder is 50 nm; the particle size of the silicon dioxide is 10 nm; the grade of polytetrafluoroethylene is 6515; and the grade of the acrylic rubber is AR840.

[0021] Example 1 High temperature resistant submersible motor winding wire, from inside to outside, includes conductor, polyimide film layer, fluoroplastic insulation layer, and sheath layer; The sheath layer includes the following raw materials in parts by weight: 35 parts of polyetheretherketone, 20 parts of polytetrafluoroethylene, 5 parts of acrylic rubber, 5 parts of nano inorganic filler, 0.3 parts of antioxidant 1010, 0.2 parts of antioxidant 626, 2.7 parts of glass fiber, and 0.3 parts of carbon fiber; The melting index of polyetheretherketone at 380°C and 10kg is 10g / 10min (grade 1105-7760), and the nano inorganic filler is graphite powder and talcum powder in a mass ratio of 1:1; A method for preparing a high temperature resistant submersible motor winding wire comprises the following steps: S1, mixing the raw materials of the sheath layer to obtain a mixture; S2, coating the surface of the conductor formed by twisting the copper wires with a polyimide film layer to obtain a wire core; S3. Coat a fluoroplastic insulation layer on the surface of the wire core, and extrude a mixture on the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0022] Example 2 High temperature resistant submersible motor winding wire, from inside to outside, includes conductor, polyimide film layer, fluoroplastic insulation layer, and sheath layer; The sheath layer comprises the following raw materials in parts by weight: 45 parts of polyetheretherketone, 30 parts of polytetrafluoroethylene, 15 parts of acrylic rubber, 10 parts of nano inorganic filler, 0.5 parts of antioxidant 1076, 0.5 parts of antioxidant 168, 0.9 parts of glass fiber, and 8.1 parts of carbon fiber; Among them, the melting index of polyetheretherketone at 380°C and 10kg is 10g / 10min (grade 1105-7760), and the nano inorganic filler is graphite powder; A method for preparing a high temperature resistant submersible motor winding wire comprises the following steps: S1, mixing the raw materials of the sheath layer to obtain a mixture; S2, coating the surface of the conductor formed by twisting the copper wires with a polyimide film layer to obtain a wire core; S3. Coat a fluoroplastic insulation layer on the surface of the wire core, and extrude a mixture on the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0023] Example 3 High temperature resistant submersible motor winding wire, from inside to outside, includes conductor, polyimide film layer, fluoroplastic insulation layer, and sheath layer; The sheath layer includes the following raw materials in parts by weight: 40 parts of polyetheretherketone, 28 parts of polytetrafluoroethylene, 7 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; The melting index of polyetheretherketone at 380°C and 10kg is 10g / 10min (grade 1105-7760), and the nano inorganic filler is graphite powder and silicon dioxide in a mass ratio of 1:1; A method for preparing a high temperature resistant submersible motor winding wire comprises the following steps: S1, mixing the raw materials of the sheath layer to obtain a mixture; S2, coating the surface of the conductor formed by twisting the copper wires with a polyimide film layer to obtain a wire core; S3. Coat a fluoroplastic insulation layer on the surface of the wire core, and extrude a mixture on the surface of the fluoroplastic insulation layer to obtain a high-temperature resistant submersible motor winding wire.

[0024] Example 4 The only difference between this embodiment and embodiment 3 is 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.

[0025] Example 5 The only difference between this embodiment and embodiment 3 is 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.

[0026] Example 6 The only difference between this embodiment and embodiment 5 is 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.

[0027] Example 7 The only difference between this embodiment and embodiment 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 29.64 g / 10 min (brand number 1105-7777).

[0028] Example 8 The difference between this embodiment and embodiment 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 14.3 g / 10 min (grade 1105-7781).

[0029] Example 9 The only difference between this embodiment and embodiment 6 is that the melt index of polyetheretherketone at 380°C and 10 kg is 22.26 g / 10 min (grade 1105-7776).

[0030] Example 10 The 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; The preparation method of 4-carbamoylphenylboronic acid modified nano inorganic filler comprises the following steps: dissolving 0.5g 4-carbamoylphenylboronic acid in 50g methanol, adding 10g nano inorganic filler for mixing, and removing methanol to obtain 4-carbamoylphenylboronic acid modified nano inorganic filler.

[0031] Embodiment 11 The 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; The preparation method of 4-carbamoylphenylboronic acid modified nano inorganic filler comprises the following steps: dissolving 1g 4-carbamoylphenylboronic acid in 50g methanol, adding 10g nano inorganic filler for mixing, and removing methanol to obtain 4-carbamoylphenylboronic acid modified nano inorganic filler.

[0032] Comparative Example 1 The difference between this comparative example and Example 3 is that the sheath layer includes the following raw materials in parts by weight: 75 parts of polyetheretherketone, 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.

[0033] Comparative Example 2 The difference between this comparative example and Example 3 is that the sheath layer includes the following raw materials in parts by weight: 60 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.

[0034] The mixed materials obtained in Examples 1 to 11 and Comparative Examples 1 to 2 were extruded into sheets (thickness 2 mm) according to their respective molding processes, cut into Type 1A specimens in GB / T 1040.2-2022, and subjected to high temperature resistance tests: The samples were placed at 180°C for 168 hours, and the tensile strength of the samples was tested before and after high-temperature treatment, and the change rate of tensile strength was calculated.

[0035] Among them, tensile strength change rate = [(tensile strength before high temperature treatment - tensile strength after high temperature treatment) / tensile strength before high temperature treatment] × 100%; The tensile strength is tested in accordance with GB / T 1040.1-2018 “Determination of tensile properties of plastics Part 1: General”, with a test speed of 1 mm / min.

[0036] The results are shown in Table 1 below.

[0037] Table 1 Performance test results

[0038] Compared with Comparative Examples 1 to 2, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 1 to 11 is smaller, indicating that the sheath layer of the high-temperature resistant submersible motor winding wire is compounded with polyetheretherketone, polytetrafluoroethylene, and acrylic rubber with a melt index of 10 to 30 g / 10 min, which significantly improves the high temperature resistance of the submersible motor winding wire.

[0039] Compared with Examples 3 to 4, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 5 to 6 is smaller, indicating that the mass ratio of polyetheretherketone, polytetrafluoroethylene, and acrylic rubber in the sheath layer is adjusted to 40:28:8 to 12, which further improves the high temperature resistance of the submersible motor winding wire.

[0040] Compared with Examples 6 and 7, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 8 and 9 is smaller and the tensile strength before high-temperature treatment is higher, indicating that when the melt index of polyetheretherketone at 380°C and 10kg is 14.3-22.26g / 10min, it is compounded with polytetrafluoroethylene and acrylic rubber in the sheath layer, which further improves the high temperature resistance and strength of the submersible motor winding wire.

[0041] Compared with Example 9, the tensile strength change rate of the sheath layer of the submersible motor winding wire prepared in Examples 10 to 11 is smaller and the tensile strength before high-temperature treatment is higher, indicating that the nano-inorganic filler of the sheath layer is modified with 4-aminoformylphenylboronic acid, which further improves the high temperature resistance and strength of the submersible motor winding wire.

[0042] The above are only 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 in the protection scope of the present invention.

Claims

1. A high temperature resistant submersible motor winding wire, characterized in that: It comprises a wire core and a fluoroplastic insulation layer coated on the outside of the wire core; the wire core comprises a conductor formed by twisting copper wires and a polyimide film layer in sequence from the inside to the outside; a sheath layer is arranged outside the fluoroplastic insulation layer; 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 acrylic rubber, 5-10 parts of nano inorganic filler, 0.5-1 part of antioxidant, and 3-9 parts of inorganic fiber; The polyetheretherketone has a melting index of 10-30 g / 10 min at 380° C. and 10 kg.

2. A high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The mass ratio of the polyetheretherketone, polytetrafluoroethylene and acrylic rubber is 40:28:8-12.

3. The high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The polyetheretherketone has a melting index of 14.3-22.26 g / 10 min at 380° C. and 10 kg.

4. The high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The nano inorganic filler includes one or more of graphite powder, silicon dioxide, talcum powder and molybdenum disulfide.

5. The high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The particle size of the nano inorganic filler is 10-50 nm.

6. The high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The nano inorganic filler is a 4-carbamoylphenylboronic acid modified nano inorganic filler.

7. A high temperature resistant submersible motor winding wire according to claim 6, characterized in that: The preparation method of the 4-carbamoylphenylboronic acid modified nano inorganic filler, The following steps are involved: After dissolving 4-carbamoylphenylboronic acid in a solvent, adding a nano inorganic filler and mixing, removing the solvent, and obtaining a 4-carbamoylphenylboronic acid modified nano inorganic filler.

8. The high temperature resistant submersible motor winding wire according to claim 7, characterized in that: The mass ratio of the 4-carbamoylphenylboronic acid, the solvent and the nano inorganic filler is 0.5-1:50:

10.

9. The high temperature resistant submersible motor winding wire according to claim 1, characterized in that: The antioxidants include hindered phenol antioxidants and phosphite antioxidants; The inorganic fibers include glass fibers and carbon fibers in a mass ratio of 1:9 to 9:

1.

10. A method for preparing a high temperature resistant submersible motor winding wire according to any one of claims 1 to 9, characterized in that: The following steps are involved: 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 formed by twisting the 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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