Composite insulation paper for motor

Abstract

The utility model discloses composite insulation paper for a motor. Relates to the technical field of insulating materials. Comprising a PEEK layer, two fiber paper layers, an adhesive layer and a polytetrafluoroethylene layer, the two polytetrafluoroethylene layers are adhered to the PEEK layer by the two fiber paper layers through the two adhesive layers. The polytetrafluoroethylene layer is arranged on the surface of the PEEK layer, and the high chemical stability of a carbon-fluorine bond of the polytetrafluoroethylene layer is utilized, so that the chemical corrosion resistance of the material is remarkably enhanced, the composite insulation paper is stable for a long time in complex media such as cooling oil, acid and alkali, performance degradation caused by chemical corrosion of the composite insulation paper in the scheme is prevented, and the long-term reliability of a motor in a severe environment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of insulating material, specifically to a composite insulating paper for motor. BACKGROUND

[0002] As a key material in the motor, the insulating paper is usually composed of multiple layers to provide mechanical support and electrical insulation performance. However, in the harsh operating environment of the motor, the surface characteristics of the existing insulating paper still have certain limitations:

[0003] 1. First, the chemical stability of the surface of the insulating paper is poor, and when it is in contact with cooling oil, acid and alkali and other media for a long time, it may decompose or its performance may deteriorate, affecting its electrical insulation effect;

[0004] 2. Secondly, the surface friction coefficient is high, and wear and heat accumulation are likely to occur during dynamic operation of the motor, reducing the service life of the material;

[0005] 3. In addition, the surface energy of the insulating paper is high, and it is easy to adsorb oil stains and dust, resulting in surface contamination, which affects the electrical performance and operating stability. These problems significantly limit the application of the insulating paper in complex environments, especially in the field of high-performance motors, and there is an urgent need to solve the above problems by a composite insulating paper for motor. SUMMARY

[0006] The purpose of the present application is to provide a technical solution to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution:

[0008] A composite insulating paper for motor, comprising a PEEK layer, two layers of fiber paper layer, an adhesive layer and a polytetrafluoroethylene layer; the two layers of fiber paper layer are bonded to the PEEK layer by the two layers of adhesive layer and the two layers of polytetrafluoroethylene layer.

[0009] Preferably, the polytetrafluoroethylene layer is a surface-activated polytetrafluoroethylene layer.

[0010] Preferably, the fiber paper layer is one of aramid paper layer or Nomex paper layer.

[0011] Preferably, the adhesive layer is one of epoxy adhesive layer or polyurethane layer.

[0012] Preferably, the thickness of the PEEK layer is 25um-350um.

[0013] Preferably, the adhesive layer is a polyurethane adhesive layer.

[0014] Preferably, the thickness of the polyurethane adhesive layer is 5um-30um.

[0015] Preferably, the polytetrafluoroethylene layer is a surface plasma or sodium treated polytetrafluoroethylene layer.

[0016] In summary, the technical effects and advantages of the present application are:

[0017] 1. By setting a polytetrafluoroethylene (PTFE) layer on the surface of the PEEK layer, the high chemical stability (bond energy up to 485 kJ / mol) of the carbon-fluorine bond (C-F bond) is utilized to significantly enhance the chemical corrosion resistance of the material. In complex media such as cooling oil, acid and base, it can be stable for a long time, preventing the performance degradation of the composite insulating paper caused by chemical erosion, thereby ensuring the long-term reliability of the motor in harsh environments.

[0018] 2. The composite insulating paper of the present application is provided with a polytetrafluoroethylene (PTFE) layer, which has a very low friction coefficient (about 0.05-0.10) and a highly crystallized molecular structure on its surface, which can significantly reduce friction and heat accumulation in dynamic mechanical environment, forming a lasting friction-reducing protection. By reducing friction heat and mechanical loss, the service life of the insulating paper under high-speed motor operating conditions is extended, and the system operating efficiency is improved.

[0019] 3. The composite insulating paper of the present application has very low surface energy (about 18 mN / m) and shielding effect of molecular surface fluorine atoms, excellent hydrophobic and oleophobic properties (contact angle can reach more than 110°), which can effectively prevent dust, oil stains and other pollutants from adhering to the surface of the insulating paper, keeping it clean during long-term use, and further improving the stability and reliability of the insulating performance. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The present application is a sectional view.

[0022] Reference numerals in the drawing: 1 PEEK layer; 2 fiber paper layer; 3 adhesive layer; 4 polytetrafluoroethylene layer. DETAILED DESCRIPTION

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, a composite insulating paper for motors includes a PEEK layer 1, two fiber paper layers 2, an adhesive layer 3, and a polytetrafluoroethylene (PTFE) layer 4. The two fiber paper layers 2 are bonded to the PEEK layer 1 via the two adhesive layers 3. By setting the PTFE layer 4 on the surface of the PEEK layer 1, the high chemical stability of its carbon-fluorine bonds (CF bonds, with bond energies up to 485 kJ / mol) significantly enhances the material's resistance to chemical corrosion. It remains stable in complex media such as cooling oil, acids, and alkalis for a long time, preventing performance degradation due to chemical erosion and ensuring the long-term reliability of the motor in harsh environments. The composite insulating paper of this design, by setting the PTFE layer 4, has an extremely low coefficient of friction (approximately 0.05-0.10) and a highly crystalline molecular structure, which can significantly reduce friction and heat accumulation in dynamic mechanical environments, forming a durable friction-reducing protection. By reducing frictional heat and mechanical losses, the service life of the insulating paper under high-speed motor operating conditions is extended, while improving system operating efficiency. The composite insulating paper in this solution, due to the inclusion of a polytetrafluoroethylene (PTFE) layer 4, possesses extremely low surface energy (approximately 18 mN / m) and a shielding effect of fluorine atoms on the molecular surface, exhibiting excellent hydrophobic and oleophobic properties (contact angle exceeding 110°). This effectively prevents dust, oil, and other contaminants from adhering to the insulating paper surface, keeping it clean during long-term use and further improving the stability and reliability of insulation performance.

[0025] Furthermore, the polytetrafluoroethylene layer 4 is a polytetrafluoroethylene layer with a surface activated treatment. This enables the polytetrafluoroethylene layer 4 to have the property of adhering to the surface of the polyetheretherketone (PEEK) layer 1; specifically, the polytetrafluoroethylene layer 4 is a polytetrafluoroethylene layer 4 with a surface treated by plasma or sodium treatment.

[0026] Furthermore, the fiber paper layer 2 is either an aramid paper layer or a Nomex paper layer. This can be adapted to meet user needs, thus accommodating motors in industrial motors or new energy vehicles.

[0027] Further, the adhesive layer 3 is one of an epoxy adhesive layer and a polyurethane adhesive layer; in particular, the adhesive layer 3 is a polyurethane adhesive layer. The polyurethane adhesive layer has the characteristic of UV rapid photocuring, and when the present scheme is realized as a product, the yield can be greatly improved. Further, the thickness of the polyurethane adhesive layer is 5-30 um, which can be adaptively adjusted according to user requirements.

[0028] Further, the thickness of the PEEK layer 1 is 25-350 um, which can be adaptively adjusted according to user requirements.

[0029] Finally, it should be noted that the above only describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A composite insulation paper for electric machines, characterized by: The PEEK layer, two fiber paper layers, an adhesive layer, and two polytetrafluoroethylene layers are provided.

2. The composite insulation paper for electric machines according to claim 1, characterized in that: The polytetrafluoroethylene layer is a surface-activated polytetrafluoroethylene layer.

3. The composite insulation paper for electric machines according to claim 1, characterized in that: The fiber paper layer is one of aramid paper or Nomex paper.

4. The composite insulation paper for electric machines according to claim 1, characterized in that: The adhesive layer is one of an epoxy adhesive layer or a polyurethane layer.

5. The composite insulation paper for electric machines according to claim 1, characterized in that: The thickness of the PEEK layer is 25-350 microns.

6. The composite insulation paper for electric machines according to claim 4, characterized in that: The adhesive layer is a polyurethane adhesive layer.

7. The composite insulation paper for electric machines according to claim 6, characterized in that: The thickness of the polyurethane adhesive layer is 5-30 microns.

8. The composite insulation paper for electric machines according to claim 2, characterized in that: The polytetrafluoroethylene layer is a surface-plasma or sodium-activated polytetrafluoroethylene layer.

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