A high-voltage submersible motor winding wire and a preparation method thereof

Abstract

The present invention relates to the technical field of winding wires, and proposes a high-voltage submersible motor winding wire and a preparation method thereof. The high-voltage submersible motor winding wire includes a conductor, a cross-linked polyethylene insulation layer, and a sheath layer from the inside to the outside; the sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 5-10 parts of polyphenylene sulfide, 8-16 parts of SEBS, 3-6 parts of a compatibilizer, 0.5-1 parts of a nucleating agent, 1-2 parts of an antioxidant, and 10-15 parts of a fiber filler; the mass fraction of styrene in SEBS is 20%-37%. Through the above technical solution, the problem of low strength and poor wear resistance of the sheath layer of the high-voltage submersible motor winding wire in the related art is solved.

Description

Technical Field

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

[0002] As a key component of high-voltage submersible motors, the performance of the sheath layer of the winding wire plays a vital role in the reliable operation of the motor in high-pressure and complex underwater environments.

[0003] The sheath layer materials used in some high-voltage submersible motor winding wires are difficult to meet actual needs in terms of strength. For example, traditional rubber materials, although they have certain flexibility and insulation properties, have limited tensile strength and tear resistance. When the motor is in a high-pressure environment, especially when subjected to external forces such as water pressure changes, stretching and torsion during installation and transportation, the sheath layer is prone to cracks and damage. The sheath material also has the problem of insufficient wear resistance. During long-term scouring by water flow and frequent contact and friction with particles such as mud and sand, the surface of the sheath material is easily worn. Over time, moisture, corrosive substances, etc. are more likely to invade the interior of the winding wire, affecting the service life of the high-voltage submersible motor. Therefore, it is necessary to improve the strength and wear resistance of the sheath layer of the high-voltage submersible motor winding wire. Summary of the invention

[0004] The present invention provides a high-voltage submersible motor winding wire and a preparation method thereof, which solves the problems of low sheath strength and poor wear resistance of the high-voltage submersible motor winding wire in the related art.

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

[0006] The present invention provides a high-voltage submersible motor winding wire, which comprises a conductor, a cross-linked polyethylene insulation layer, and a sheath layer from the inside to the outside;

[0007] The sheath layer comprises the following raw materials in parts by weight: 100 parts of polypropylene, 5-10 parts of polyphenylene sulfide, 8-16 parts of SEBS, 3-6 parts of compatibilizer, 0.5-1 part of nucleating agent, 1-2 parts of antioxidant, and 10-15 parts of fiber filler;

[0008] The mass fraction of styrene in the SEBS is 20% to 37%.

[0009] In the present invention, SEBS is a hydrogenated styrene-butadiene-styrene block copolymer.

[0010] As a further technical solution, the mass ratio of the polypropylene, polyphenylene sulfide and SEBS is 100:8:10-12.

[0011] In the present invention, the mass ratio of polypropylene, polyphenylene sulfide and SEBS in the sheath layer of the high-voltage submersible motor winding wire is 100:8:10-12, which further improves the strength and wear resistance of the high-voltage submersible motor winding wire.

[0012] As a further technical solution, the compatibilizer includes one or two of maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene.

[0013] As a further technical solution, the antioxidant includes an amine antioxidant or a phenol antioxidant.

[0014] As a further technical solution, the nucleating agent includes an inorganic nucleating agent; the inorganic nucleating agent includes one or both of talc and calcium carbonate.

[0015] As a further technical solution, the fiber filler includes one or more of basalt fiber, aramid fiber, and glass fiber.

[0016] As a further technical solution, the fiber filler is a fiber filler modified by a polylactic acid-glycolic acid copolymer.

[0017] As a further technical solution, the polylactic acid-glycolic acid copolymer modified fiber filler includes the following raw materials in parts by weight: 2-5 parts of polylactic acid-glycolic acid copolymer, 15-20 parts of fiber filler, 0.1-0.2 parts of silane coupling agent, and 35-45 parts of organic solvent.

[0018] As a further technical solution, the preparation method of the polylactic acid-glycolic acid copolymer modified fiber filler includes the following steps: mixing the polylactic acid-glycolic acid copolymer, a silane coupling agent and an organic solvent, adding the fiber filler and continuing to mix, and drying to obtain the polylactic acid-glycolic acid copolymer modified fiber filler.

[0019] In the present invention, polylactic acid-glycolic acid copolymer is used to modify the fiber filler in the sheath layer of the high-voltage submersible motor winding wire, thereby further improving the strength and wear resistance of the high-voltage submersible motor winding wire.

[0020] The present invention also provides a method for preparing a high-voltage submersible motor winding wire, comprising the following steps:

[0021] S1, mixing the raw materials of the sheath layer, extruding and granulating, to obtain sheath layer granules;

[0022] S2. After the cross-linked polyethylene insulation layer is extruded on the surface of the conductor, the sheath layer pellets are extruded and coated on the outside of the cross-linked polyethylene insulation layer to obtain a high-voltage submersible motor winding wire.

[0023] The working principle and beneficial effects of the present invention are:

[0024] In the present invention, the high-voltage submersible motor winding wire includes a conductor, a cross-linked polyethylene insulation layer, and a sheath layer from the inside to the outside. Polyphenylene sulfide and SEBS with a styrene mass fraction of 20% to 37% are introduced into the polypropylene matrix of the sheath layer for compounding, thereby significantly improving the strength and wear resistance of the high-voltage submersible motor winding wire. DETAILED DESCRIPTION

[0025] 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.

[0026] In the following examples and comparative examples, the model of polypropylene is S700;

[0027] The model of polyphenylene sulfide is A504X95;

[0028] The model of maleic anhydride grafted polyethylene is XYJ1251, purchased from Dongguan Xingyuan Chemical Co., Ltd.;

[0029] The particle size of talc is 100nm;

[0030] The particle size of calcium carbonate is 80nm;

[0031] The diameter of the basalt fiber is 16 μm and the length is 1 mm;

[0032] The glass fiber has a diameter of 13 μm and a length of 1 mm;

[0033] The weight average molecular weight of the polylactic acid-glycolic acid copolymer is 150,000, and the molar ratio of lactic acid to glycolic acid in the polylactic acid-glycolic acid copolymer is 50:50;

[0034] The weight average molecular weight of polylactic acid is 150,000.

[0035] Example 1

[0036] High-voltage submersible motor winding wire includes, from inside to outside, a conductor, a cross-linked polyethylene insulation layer, and a sheath layer;

[0037] The sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 5 parts of polyphenylene sulfide, 8 parts of SEBS, 3 parts of maleic anhydride grafted polyethylene, 0.1 parts of talc, 0.4 parts of calcium carbonate, 1 part of antioxidant 264, and 10 parts of basalt fiber; the mass fraction of styrene in SEBS is 20% (model G1642);

[0038] A method for preparing a high-voltage submersible motor winding wire comprises the following steps:

[0039] S1, mixing the raw materials of the sheath layer, extruding and granulating, and obtaining sheath layer granules;

[0040] S2. After extruding a cross-linked polyethylene insulation layer on the surface of the conductor, the sheath layer pellets are extruded and coated on the outside of the cross-linked polyethylene insulation layer to obtain a high-voltage submersible motor winding wire.

[0041] Example 2

[0042] High-voltage submersible motor winding wire includes, from inside to outside, a conductor, a cross-linked polyethylene insulation layer, and a sheath layer;

[0043] The sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 10 parts of polyphenylene sulfide, 16 parts of SEBS, 6 parts of maleic anhydride grafted polyethylene, 1 part of calcium carbonate, 2 parts of antioxidant 264, 5 parts of basalt fiber, and 10 parts of glass fiber; the mass fraction of styrene in SEBS is 37% (model G1701);

[0044] A method for preparing a high-voltage submersible motor winding wire comprises the following steps:

[0045] S1, mixing the raw materials of the sheath layer, extruding and granulating, and obtaining sheath layer granules;

[0046] S2. After extruding a cross-linked polyethylene insulation layer on the surface of the conductor, the sheath layer pellets are extruded and coated on the outside of the cross-linked polyethylene insulation layer to obtain a high-voltage submersible motor winding wire.

[0047] Example 3

[0048] High-voltage submersible motor winding wire includes, from inside to outside, a conductor, a cross-linked polyethylene insulation layer, and a sheath layer;

[0049] The sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 8 parts of polyphenylene sulfide, 8 parts of SEBS, 5 parts of maleic anhydride grafted polyethylene, 0.8 parts of calcium carbonate, 1.5 parts of antioxidant 264, and 12 parts of basalt fiber; the mass fraction of styrene in SEBS is 20% (model G1642);

[0050] A method for preparing a high-voltage submersible motor winding wire comprises the following steps:

[0051] S1, mixing the raw materials of the sheath layer, extruding and granulating, and obtaining sheath layer granules;

[0052] S2. After extruding a cross-linked polyethylene insulation layer on the surface of the conductor, the sheath layer pellets are extruded and coated on the outside of the cross-linked polyethylene insulation layer to obtain a high-voltage submersible motor winding wire.

[0053] Example 4

[0054] The only difference between this embodiment and embodiment 3 is that the mass fraction of styrene in SEBS is 37% (model G1701).

[0055] Example 5

[0056] The only difference between this embodiment and embodiment 3 is that the sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 8 parts of polyphenylene sulfide, 14 parts of SEBS, 5 parts of maleic anhydride grafted polyethylene, 0.8 parts of calcium carbonate, 1.5 parts of antioxidant 264, and 12 parts of basalt fiber; the mass fraction of styrene in SEBS is 20% (model G1642).

[0057] Example 6

[0058] The only difference between this embodiment and embodiment 3 is that the sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 8 parts of polyphenylene sulfide, 10 parts of SEBS, 5 parts of maleic anhydride grafted polyethylene, 0.8 parts of calcium carbonate, 1.5 parts of antioxidant 264, and 12 parts of basalt fiber; the mass fraction of styrene in SEBS is 20% (model G1642).

[0059] Example 7

[0060] The only difference between this embodiment and embodiment 3 is that the sheath layer includes the following raw materials in parts by weight: 100 parts of polypropylene, 8 parts of polyphenylene sulfide, 12 parts of SEBS, 5 parts of maleic anhydride grafted polyethylene, 0.8 parts of calcium carbonate, 1.5 parts of antioxidant 264, and 12 parts of basalt fiber; the mass fraction of styrene in SEBS is 20% (model G1642).

[0061] Example 8

[0062] The difference between this embodiment and embodiment 7 is that the basalt fiber is replaced by an equal amount of polylactic acid-modified basalt fiber, and the polylactic acid-modified basalt fiber comprises the following raw materials in parts by weight: 2 parts of polylactic acid, 15 parts of basalt fiber, 0.1 parts of silane coupling agent KH550, and 35 parts of dichloromethane;

[0063] The preparation method of polylactic acid modified basalt fiber comprises the following steps: mixing polylactic acid, silane coupling agent KH550 and dichloromethane, adding basalt fiber and continuing to mix, and drying to obtain polylactic acid modified basalt fiber.

[0064] Example 9

[0065] The difference between this embodiment and embodiment 7 is that the basalt fiber is replaced by an equal amount of polylactic acid-glycolic acid copolymer modified basalt fiber, and the polylactic acid-glycolic acid copolymer modified basalt fiber comprises the following raw materials in parts by weight: 2 parts of polylactic acid-glycolic acid copolymer, 15 parts of basalt fiber, 0.1 parts of silane coupling agent KH550, and 35 parts of dichloromethane;

[0066] The preparation method of polylactic acid-glycolic acid copolymer modified basalt fiber comprises the following steps: mixing polylactic acid-glycolic acid copolymer, silane coupling agent KH550 and dichloromethane, adding basalt fiber and continuing mixing, and drying to obtain polylactic acid-glycolic acid copolymer modified basalt fiber.

[0067] Example 10

[0068] The difference between this embodiment and embodiment 7 is that the basalt fiber is replaced by an equal amount of polylactic acid-glycolic acid copolymer modified basalt fiber, and the polylactic acid-glycolic acid copolymer modified basalt fiber comprises the following raw materials in parts by weight: 5 parts of polylactic acid-glycolic acid copolymer, 20 parts of basalt fiber, 0.2 parts of silane coupling agent KH550, and 45 parts of dichloromethane;

[0069] The preparation method of polylactic acid-glycolic acid copolymer modified basalt fiber comprises the following steps: mixing polylactic acid-glycolic acid copolymer, silane coupling agent KH550 and dichloromethane, adding basalt fiber and continuing mixing, and drying to obtain polylactic acid-glycolic acid copolymer modified basalt fiber.

[0070] Comparative Example 1

[0071] The difference between this comparative example and Example 3 is that SEBS is replaced by an equal amount of polyphenylene sulfide.

[0072] Comparative Example 2

[0073] The only difference between this comparative example and Example 3 is that polyphenylene sulfide is replaced by an equal amount of SEBS, and the mass fraction of styrene in SEBS is 20% (model G1642).

[0074] Comparative Example 3

[0075] The only difference between this comparative example and Example 3 is that the mass fraction of styrene in SEBS is 13% (model G1645MO).

[0076] Comparative Example 4

[0077] The only difference between this comparative example and Example 3 is that the mass fraction of styrene in SEBS is 40% (model GRP6936).

[0078] The sheath layer pellets prepared in Examples 1 to 10 and Comparative Examples 1 to 4 were extruded into sheets (thickness 2 mm) according to their respective molding processes, cut into 1A type specimens in GB / T 1040.2-2022, and subjected to tensile strength tests according to GB / T1040.1-2018 "Determination of tensile properties of plastics Part 1: General Principles", with a test speed of 1 mm / min;

[0079] Carry out quality wear test in accordance with GB / T 3960-2016 "Plastic Sliding Friction Wear Test Method";

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

[0081] Table 1 Performance test results

[0082]

[0083] Compared with Comparative Examples 1 to 4, the sheath layer of the high-voltage submersible motor winding wire prepared in Examples 1 to 10 has higher tensile strength and lower mass wear, indicating that the introduction of polyphenylene sulfide and SEBS with a styrene mass fraction of 20% to 37% into the polypropylene matrix of the sheath layer for compounding significantly improves the strength and wear resistance of the high-voltage submersible motor winding wire.

[0084] Compared with Example 3 and Example 5, the sheath layer of the high-voltage submersible motor winding wire prepared in Examples 6~7 has higher tensile strength and lower mass wear, indicating that the mass ratio of polypropylene, polyphenylene sulfide and SEBS in the sheath layer of the high-voltage submersible motor winding wire is 100:8:10~12, which further improves the strength and wear resistance of the high-voltage submersible motor winding wire.

[0085] Compared with Examples 7 and 8, the sheath layer of the high-voltage submersible motor winding wire prepared in Examples 9 and 10 has higher tensile strength and lower mass wear, indicating that the fiber filler in the sheath layer of the high-voltage submersible motor winding wire is modified by using polylactic acid-hydroxyacetic acid copolymer, which further improves the strength and wear resistance of the high-voltage submersible motor winding wire.

[0086] 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-voltage submersible motor winding wire, characterized in that: From the inside to the outside, it includes a conductor, a cross-linked polyethylene insulation layer, and a sheath layer; The sheath layer comprises the following raw materials in parts by weight: 100 parts of polypropylene, 5-10 parts of polyphenylene sulfide, 8-16 parts of SEBS, 3-6 parts of compatibilizer, 0.5-1 part of nucleating agent, 1-2 parts of antioxidant, and 10-15 parts of fiber filler; The mass fraction of styrene in the SEBS is 20% to 37%; The fiber filler includes one or more of basalt fiber, aramid fiber, and glass fiber; The fiber filler is a fiber filler modified by a polylactic acid-glycolic acid copolymer; The polylactic acid-glycolic acid copolymer modified fiber filler comprises the following raw materials in parts by weight: 2-5 parts of polylactic acid-glycolic acid copolymer, 15-20 parts of fiber filler, 0.1-0.2 parts of silane coupling agent, and 35-45 parts of organic solvent.

2. A high voltage submersible motor winding wire according to claim 1, characterized in that: The mass ratio of the polypropylene, polyphenylene sulfide and SEBS is 100:8:10-12.

3. The high-voltage submersible motor winding wire according to claim 1, characterized in that: The compatibilizer includes one or two of maleic anhydride grafted polypropylene and maleic anhydride grafted polyethylene.

4. The high-voltage submersible motor winding wire according to claim 1, characterized in that: The antioxidant includes an amine antioxidant or a phenol antioxidant.

5. The high-voltage submersible motor winding wire according to claim 1, characterized in that: The nucleating agent includes an inorganic nucleating agent; the inorganic nucleating agent includes one or both of talc and calcium carbonate.

6. The high-voltage submersible motor winding wire according to claim 1, characterized in that: The preparation method of the polylactic acid-glycolic acid copolymer modified fiber filler comprises the following steps: mixing the polylactic acid-glycolic acid copolymer, a silane coupling agent and an organic solvent, adding the fiber filler and continuing to mix, and drying to obtain the polylactic acid-glycolic acid copolymer modified fiber filler.

7. A method for preparing a high-voltage submersible motor winding wire according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, mixing the raw materials of the sheath layer, extruding and granulating, to obtain sheath layer granules; S2. After the cross-linked polyethylene insulation layer is extruded on the surface of the conductor, the sheath layer pellets are extruded and coated on the outside of the cross-linked polyethylene insulation layer to obtain a high-voltage submersible motor winding wire.

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