Carbon fiber car roof flow guiding device

Abstract

According to the carbon fiber car roof flow guiding device, the two sides of a flow guiding cover are directly hinged to a car body through stainless steel fasteners, the middle position of the flow guiding cover is fastened to equipment of different systems of a car roof through the stainless steel fasteners by adopting an aluminum profile sliding way, and an internal cross beam structure of an original flow guiding device is omitted; the motor train unit flow guiding device integrates pneumatic optimization, material light weight, structural reliability and the like and is installed by being matched with multiple systems of a train roof, so that the flow guiding device improves the aerodynamic performance and the safety performance of the high-speed motor train unit and is convenient to disassemble and assemble, the molding process is a compression molding process for manufacturing, the process achieves light weight, and meanwhile the production efficiency is improved. And the overall appearance can be ensured to be attractive.

Description

Technical Field

[0001] This invention relates to the field of roof-mounted airflow guide devices for intercity rail transit vehicles, and more particularly to a carbon fiber roof-mounted airflow guide device. Background Technology

[0002] The development of roof-mounted aerodynamic devices for high-speed trains stems from the urgent need for aerodynamic performance in the ever-increasing speed of high-speed trains. Its technological evolution is closely related to train speed increase, noise reduction, energy saving and safety. With technological innovation, more systems are placed on the roof, which makes the roof-mounted aerodynamic devices face more problems in terms of protecting various system equipment and adapting to the installation of various system equipment. Summary of the Invention

[0003] The purpose of this invention is to integrate aerodynamic optimization, lightweight materials, and structural reliability into a single high-speed train aerodynamic guide device, and to adapt it for installation in multiple systems on the roof of the train. This allows the aerodynamic guide device to improve the aerodynamic and safety performance of high-speed trains, facilitate disassembly and assembly, and ensure the aesthetic appearance of the train.

[0004] To achieve the above objectives, the present invention provides a carbon fiber roof air deflector. The entire device includes a roof air deflector, an inspection door, and a ventilation grille. The roof air deflector is connected to a roof slide channel on both sides via T-shaped sliders. An aluminum profile bracket or a carbon fiber bracket is connected to the roof slide channel via T-shaped sliders. The aluminum profile bracket or carbon fiber bracket is connected to the roof air deflector via fasteners. A roof equipment bracket is mounted on the roof slide channel via fasteners. The roof equipment bracket is connected to the aluminum profile slide channel via fasteners. The roof air deflector covers the roof equipment and is connected to the roof equipment bracket via the slide channel and T-shaped sliders. The inspection door is bolted to the roof air deflector. The ventilation grille is installed on the roof air deflector to provide heat dissipation.

[0005] Furthermore, the roof deflector has an opening near the roof piping system, and a metal flange is installed at the opening to prevent the roof piping system from vibrating during operation and thus damaging the carbon fiber roof deflector.

[0006] Furthermore, the roof fairing adopts a sandwich foam core structure, with PMI75 foam material and a product thickness of 18mm. The inner skin is 0.8mm and the outer skin is 1.2mm, with a total fairing thickness of 20mm. The outer layer is covered with 3K twill fabric. The strength layer is T700, and aramid layers are added in some areas to improve the impact resistance of the bottom plate.

[0007] The roof-mounted air deflector of this invention has a simple installation structure. The two sides of the air deflector are directly hinged to the vehicle body using stainless steel fasteners. The middle position of the air deflector uses an aluminum profile slide rail to be fastened to equipment of different systems on the roof using stainless steel fasteners, eliminating the need for the original internal crossbeam structure of the air deflector. This integrates aerodynamic optimization, lightweight materials, and structural reliability into the air deflector of the EMU, and adapts it to multiple systems on the roof. This makes the air deflector improve the aerodynamic and safety performance of high-speed EMUs and facilitate disassembly and assembly. The molding process adopts a compression molding process, which achieves lightweighting while ensuring the overall aesthetic appearance. Attached Figure Description

[0008] Figure 1 Top view of the roof-mounted air deflector;

[0009] Figure 2 This is a cross-sectional view of the roof-mounted air deflector.

[0010] Figure 3 This is a front view of the device;

[0011] Figure 4 This is a cross-sectional view of the device without roof equipment. Detailed Implementation

[0012] Reference Figures 1-4 The components shown in the diagram are: 1. roof fairing; 2. roof equipment; 3. vehicle body; 4. slide rail; 5. T-shaped slider; 6. roof equipment bracket; 7. inspection door; 8. ventilation grille; 9. roof piping system; 10. carbon fiber bracket; and 11. aluminum profile bracket.

[0013] During operation, the roof deflector 1 is connected to the roof slide channel on both sides via T-shaped sliders 5. An aluminum profile bracket 10 or a carbon fiber bracket 10 is connected to the roof slide channel via T-shaped sliders 5. The aluminum profile bracket 10 or the carbon fiber bracket 10 is connected to the roof deflector 1 via fasteners. The roof equipment bracket 6 is installed on the roof slide channel via fasteners. An aluminum profile slide rail 4 is welded to the roof equipment bracket 6. The roof deflector 1 covers the roof equipment 2 and is connected to the roof equipment 2 via the slide rail 4 and T-shaped sliders 5. To facilitate maintenance personnel's inspection of the equipment inside the vehicle, an inspection door 7 is provided on the roof deflector 1, and the inspection door 7 is bolted to the roof deflector 1. During operation, the roof equipment 2 requires heat dissipation, so a ventilation grille 8 and an exhaust vent are installed on the roof deflector 1 for heat dissipation. Additionally, to avoid the roof piping system 9, an opening is made on the roof deflector 1 near the roof piping system 9, and a metal flange is installed at the opening (see...). Figure 1 and Figure 3 (Circled area) to prevent vibration of the piping system during operation, which could damage the roof deflector.

[0014] In a specific embodiment, in order to achieve product lightweighting, the roof fairing 1 adopts a carbon fiber sandwich foam core structure. The foam material is PMI75, the product thickness is 27.5mm, the inner skin is 1mm, the outer skin is 1.5mm, and the total thickness of the fairing is 30mm. The outer layer is covered with 3K twill fabric. The strength layer is T700, and aramid layers are added locally to improve the impact resistance of the bottom plate.

[0015] Compared to aluminum alloy roof fairings, the carbon fiber roof fairing 1 proposed in this invention can achieve a weight reduction of 42.9%, and compared to fiberglass roof fairings, the carbon fiber roof fairing 1 proposed in this invention can achieve a weight reduction of 23%. The weight results of roof fairings with different material schemes are shown in Table 1.

[0016] Table 1. Comparison of weight of roof fairings with different material options

[0017]

[0018] The molding process of this invention adopts compression molding, which can achieve lightweight while ensuring the overall aesthetic appearance.

Claims

1. A carbon fiber roof deflector characterized by, The whole device includes a roof fairing, an access door and a ventilation grille, the roof fairing is connected with roof sliding groove through T-shaped sliding block on both sides, aluminum profile support or carbon fiber support is connected with roof sliding groove through T-shaped sliding block, the aluminum profile support or carbon fiber support is connected with roof fairing through fastener, roof equipment support is installed on roof sliding groove through fastener, the roof equipment support and aluminum profile sliding groove are connected together through fastener, the roof fairing covers roof equipment and is connected with roof equipment support through sliding groove and T-shaped sliding block, the access door is connected with roof fairing through bolt, and the ventilation grille is installed on roof fairing to play a heat dissipation effect.

2. A carbon fibre roof spoiler as claimed in claim 1, characterised in that, The roof fairing is provided with an opening near the roof pipeline system, and a metal flange is installed at the opening, so that the roof pipeline system is prevented from vibrating and damaging the carbon fiber material of the roof fairing device during work.

3. A carbon fiber roof deflector as defined in claim 1, wherein, The roof fairing adopts a sandwich foam sandwich structure, the foam material is PMI75, the product thickness is 18mm, the inner skin is 0.8mm, the outer skin is 1.2mm, the total thickness of the roof fairing is 20mm, 3K twill fabric is laid on the outer layer, T700 is used as the strength layer, and aramid layer is locally added.

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