A double-layer insulation cylinder for a wind power generator cabin

Abstract

The utility model discloses a kind of double-layer insulation cylinders of wind power motor cabin type, including inner tube and outer tube, its innovation point is that the inner and outer side wall of inner tube and the inner and outer side wall of outer tube are evenly spaced to be provided with several reinforcing ribs, reinforcing rib is integrally formed with corresponding cylinder body, it is long strip and extends along cylinder body radial direction and forms annular platform. The cross-sectional shape of reinforcing rib can be triangle, rectangle or semicircle, and the adjacent reinforcing rib spacing is equal. Inner tube and outer tube are made of epoxy resin, polyimide and other insulating materials. The utility model is added by reinforcing rib, the structural strength and rigidity of insulation cylinder are significantly improved, the deformation resistance and crack resistance are enhanced, the damage caused by factors such as vibration and electromagnetic force during motor operation is effectively prevented, the motor winding protection effect is improved, and the motor service life is prolonged. At the same time, the improved structure reduces the requirement for the matching precision of other components during installation, simplifies the installation process and reduces the cost.

Description

Technical Field

[0001] This utility model relates to the technical field of motor and wind power components, and in particular to a double-layer insulating cylinder for wind power motor nacelles. Background Technology

[0002] In existing wind turbines, double-layer insulating sleeves are commonly used for insulation protection of the motor windings. However, research has found that the overall structural strength of the double-layer insulating sleeves in existing wind turbine technologies is relatively weak. Under the influence of vibrations and electromagnetic forces generated during motor operation, problems such as deformation and cracking are prone to occur, thus affecting the normal operation of the motor windings and reducing the reliability and service life of the motor. In addition, the insufficient rigidity of the insulating sleeve also leads to higher requirements for the fitting precision of other components during installation, increasing the installation difficulty and cost. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a double-layer insulating cylinder for wind turbine nacelles, which can significantly improve the overall structural strength and rigidity of the double-layer insulating cylinder, enhance its resistance to deformation and cracking, and effectively prevent damage to the insulating cylinder caused by factors such as vibration and electromagnetic force during motor operation, thereby improving the protection effect of the motor windings and extending the service life of the motor.

[0004] A double-layer insulating cylinder for a wind turbine nacelle, according to a first aspect of the present invention, is characterized in that it comprises an inner cylinder and an outer cylinder; a plurality of inner cylinder reinforcing ribs are evenly spaced on the inner and outer side walls of the inner cylinder, and a plurality of outer cylinder reinforcing ribs are evenly spaced on the inner and outer side walls of the outer cylinder; the inner cylinder reinforcing ribs are integrally formed with the inner cylinder, and the outer cylinder reinforcing ribs are integrally formed with the outer cylinder; both the inner cylinder reinforcing ribs and the outer cylinder reinforcing ribs are elongated strips, extending radially along the inner and outer cylinders and forming annular platforms on the inner and outer side walls of the inner and outer cylinders.

[0005] A double-layer insulating cylinder for a wind turbine nacelle according to an embodiment of the present invention has at least the following beneficial effects: By setting inner reinforcing ribs on the outer side wall of the inner cylinder and outer reinforcing ribs on the inner side wall of the outer cylinder, the overall structural strength and rigidity of the double-layer insulating cylinder are significantly improved, enhancing its resistance to deformation and cracking. This effectively prevents damage to the insulating cylinder caused by factors such as vibration and electromagnetic force during motor operation, thereby improving the protection effect of the motor windings and extending the service life of the motor.

[0006] The improved insulating cylinder structure is more stable, and the precision requirements for the fit of other components during installation are relatively reduced, simplifying the installation process, reducing installation costs, and improving production efficiency.

[0007] According to some embodiments of this utility model, the cross-sectional shapes of the inner cylinder reinforcing rib and the outer cylinder reinforcing rib are both triangular, rectangular or semi-circular.

[0008] According to some embodiments of this utility model, the spacing between two adjacent inner cylinder reinforcing ribs is equal, and the spacing between two adjacent outer cylinder reinforcing ribs is also equal.

[0009] According to some embodiments of this utility model, the materials of the inner cylinder and the outer cylinder are both insulating materials, including epoxy resin and polyimide.

[0010] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the outer cylinder of an embodiment of the present utility model. Detailed Implementation

[0012] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0013] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0015] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0016] Reference Figure 1-2 According to a first aspect of the present invention, a double-layer insulating cylinder for a wind turbine nacelle is characterized in that it includes an inner cylinder and an outer cylinder 1; a plurality of inner cylinder reinforcing ribs 3 are evenly spaced on the inner and outer side walls of the inner cylinder, and a plurality of outer cylinder reinforcing ribs 2 are evenly spaced on the inner and outer side walls of the outer cylinder 1; the inner cylinder reinforcing ribs 3 are integrally formed with the inner cylinder, and the outer cylinder reinforcing ribs 2 are integrally formed with the outer cylinder 1; both the inner cylinder reinforcing ribs 3 and the outer cylinder reinforcing ribs 2 are elongated strips, extending radially along the inner cylinder and the outer cylinder 1, and forming annular platforms on the inner and outer side walls of the inner cylinder and the outer cylinder 1.

[0017] A double-layer insulating cylinder for a wind turbine nacelle according to an embodiment of the present invention has at least the following beneficial effects: By setting inner reinforcing ribs on the outer side wall of the inner cylinder and outer reinforcing ribs on the inner side wall of the outer cylinder 1, the overall structural strength and rigidity of the double-layer insulating cylinder are significantly improved, its resistance to deformation and cracking is enhanced, and the damage to the insulating cylinder caused by factors such as vibration and electromagnetic force during motor operation is effectively prevented, thereby improving the protection effect of the motor windings and extending the service life of the motor.

[0018] The improved insulating cylinder structure is more stable, and the precision requirements for the fit of other components during installation are relatively reduced, simplifying the installation process, reducing installation costs, and improving production efficiency.

[0019] According to some embodiments of this utility model, the cross-sectional shapes of the inner cylinder reinforcing rib 3 and the outer cylinder reinforcing rib 2 are both triangular, rectangular or semi-circular.

[0020] According to some embodiments of this utility model, the spacing between two adjacent inner cylinder reinforcing ribs 3 is equal, and the spacing between two adjacent outer cylinder reinforcing ribs 2 is also equal.

[0021] According to some embodiments of the present invention, the materials of the inner cylinder and the outer cylinder 1 are both insulating materials, including epoxy resin and polyimide.

[0022] The manufacturing method of this utility model is as follows: Step 1: Add the prepared solvent-free resin solution to the degassing tank. The temperature of the degassing tank is 40-50℃, the vacuum degree inside the tank is ≤80Pa, and the time is 1hr±0.3hr to obtain solution a. Step 2: Transfer the solvent-free resin solution into a pressure vessel and then evacuate it. The temperature is 40-50℃, the vacuum degree is ≤80Pa, and the time is 0.3hr to obtain solution b. Step 3: Wrap the glass cloth around the outer surface of the PTFE inner cylinder to obtain glass cloth layer a, then put the PTFE outer cylinder 1 on top. The outer surface of glass cloth layer a is in close contact with the inner surface of the PTFE outer cylinder 1. Install the sealing ring to obtain tube blank a. Step 4: Place tube blank a in an oven and heat it at a temperature of 100-120℃. Keep tube blank a at this temperature for 1.5hr±8min to obtain tube blank b. Step 5: Adjust the oven temperature to 70-80℃ and start evacuation to achieve a vacuum of 0.3-3Pa. Dry the tube blank b for 2.5hr±8min to obtain tube blank c. Step 6: Use a glass tube with an inner diameter of 8mm to deliver the adhesive b to the space between the PTFE inner cylinder and the PTFE outer cylinder 1 of the tube blank c at a flow rate of 8s / 1cm, so that it can fully contact the glass cloth layer a, to obtain the tube blank d. The time is 1±0.3hr. Step 7: Maintain the oven temperature at 70-80℃, pressurize the pressure vessel with N2 at a rate of 0.08MPa / 10min, so that the pressure inside the pressure vessel is 0.4-0.8MPa, and perform a pressure holding operation on the tube blank d for 2±0.4hr to obtain tube blank e; The total time required for steps 6 and 7 shall not be less than 3 hours.

[0023] Step 8: Heat the oven to 120±4℃ for 20±4 min, and keep the tube blank e at the oven temperature for 0.8hr±8 min to obtain tube blank f; Step 9: Heat the oven to 150℃ and heat the tube blank f for 4 hours to obtain tube blank g; Step 10: Discharge the N2 from the pressure vessel, lower the oven temperature to below 85℃ for 25-40 minutes to obtain tube blank h, remove tube blank h from the oven, remove the sealing ring to obtain tube blank i; Step 11: Process the tube blank i according to the dimensions to obtain a double-layer polytetrafluoroethylene composite epoxy glass cloth insulating cylinder.

[0024] The embodiments described above with reference to the accompanying drawings have been described in detail. However, the embodiments are not limited to those described above. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A double-layer insulating cylinder for wind turbine nacelles, characterized in that, It includes an inner cylinder and an outer cylinder; the inner cylinder has a plurality of inner cylinder reinforcing ribs evenly spaced on its inner and outer outer walls, and the outer cylinder has a plurality of outer cylinder reinforcing ribs evenly spaced on its inner and outer outer walls; the inner cylinder reinforcing ribs are integrally formed with the inner cylinder, and the outer cylinder reinforcing ribs are integrally formed with the outer cylinder; both the inner cylinder reinforcing ribs and the outer cylinder reinforcing ribs are elongated strips, extending radially along the inner and outer cylinders and forming annular platforms on the inner and outer outer walls of the inner and outer cylinders.

2. The double-layer insulating cylinder for a wind turbine nacelle according to claim 1, characterized in that: The cross-sectional shapes of both the inner cylinder reinforcing rib and the outer cylinder reinforcing rib are triangular, rectangular, or semi-circular.

3. A double-layer insulating cylinder for a wind turbine nacelle according to claim 1, characterized in that: The spacing between two adjacent inner cylinder reinforcing ribs is equal, and the spacing between two adjacent outer cylinder reinforcing ribs is also equal.

4. A double-layer insulating cylinder for a wind turbine nacelle according to claim 1, characterized in that: Both the inner and outer cylinders are made of insulating materials.

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