Light aerospace aluminum alloy cable

Abstract

The utility model discloses a light aerospace aluminum alloy cable, which relates to the technical field of aluminum alloy cables, and comprises an elastomer support frame and a support assembly, the support assembly comprises a plurality of groups of support frames distributed at intervals on the outer side of the elastomer support frame, and the support frames are Z-shaped. The reinforcing supporting rods and the cable branches are symmetrically arranged on the inner sides of the supporting frames, each cable branch comprises a braided sleeve arranged between the supporting frames and two sets of conductor wire cores arranged in the braided sleeve, the conductor wire cores are mutually twisted, the twisting direction is the left direction, the twisting pitch is not larger than 16 times of the twisting outer diameter, and the conductor wire cores are arranged in the braided sleeve. The Z-shaped supporting frame can collapse within a certain range after a cable is pressed, a good energy absorption effect is achieved, the reinforcing supporting rods support the Z-shaped supporting frame, excessive deformation of the Z-shaped supporting frame is avoided, and therefore the Z-shaped supporting frame 2 is matched with the reinforcing supporting rods to achieve a good supporting effect on cable branches arranged in the Z-shaped supporting frame 2. And the creep resistance of the whole cable is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy cables, and particularly relates to a lightweight aluminum alloy cable for aerospace applications. Background Art

[0002] A cable is usually a rope-like object formed by stranding several or several groups of wires. The wires in each group are insulated from each other and are often twisted around a central wire. The whole is wrapped with a highly insulating covering layer. Power cables are mainly used for transmitting and distributing electric power, as well as transmitting various signals.

[0003] The Chinese patent authorization publication number is CN219759255U, and the name is a fire-resistant cable, including: a core area, a glass binding tape, a sheath, an outer insulating layer, an outer fire-resistant coating; a glass binding tape is wound around the core area; an outer insulating layer is arranged outside the glass binding tape; a sheath is arranged outside the outer insulating layer; an outer fire-resistant coating is arranged outside the sheath. By arranging a fire-resistant plastic strip between any two adjacent wires, on the one hand, this strip structure can fill and support the adjacent wires and can bend along with the wires according to the wire shape, and on the other hand, it can also completely cover the wires, and the fire-resistant coating material thickness outside the wires in the cable can be increased by using the material characteristics of the plastic strip itself, effectively prolonging the fire-resistant time of the fire-resistant cable;

[0004] The deficiencies of the above-mentioned prior art solutions are as follows: Although the above solutions can effectively prolong the fire-resistant time of the cable, most of the existing cables are manufactured by stranding tinned copper wires and then wrapping a polyvinyl chloride sheath outside. The tinned copper wires have a large mass and poor creep resistance, which is not convenient for laying and is also prone to deformation during subsequent use, causing certain inconvenience to users. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lightweight aluminum alloy cable for aerospace applications to solve the technical problems mentioned in the above background art.

[0006] The technical problems to be solved by the utility model can be realized through the following technical solutions:

[0007] A lightweight aluminum alloy cable for aerospace applications includes an elastomeric support frame,

[0008] It further includes a support assembly. The support assembly includes several groups of support frames arranged at intervals outside the elastomeric support frame, and the support frames are Z-shaped, and reinforcing struts symmetrically arranged inside the support frames;

[0009] A cable branch, the cable branch includes a braided sleeve arranged between the support frames, two conductor cores arranged inside the braided sleeve, and the conductor cores are stranded with each other, the stranding direction is left-handed, the stranding pitch does not exceed 16 times the stranding outer diameter, and an insulating sleeve covering the outside of the conductor cores.

[0010] As a further solution of the present utility model: the braided sleeve is woven from silver-plated copper wire, and the braiding density is not less than 80%.

[0011] As a further solution of the present utility model: the material of the conductor wire core is an aluminum alloy conductor.

[0012] As a further solution of the present utility model: the material of the insulating sleeve is polyetheretherketone, the nominal thickness of the insulating sleeve is 0.22 mm, and the thinnest point is not less than 85% of the nominal thickness. The extrusion outer diameter range of the braided sleeve is 1.06 - 1.08 mm.

[0013] As a further solution of the present utility model: a layer of polyimide composite tape with a thickness of 0.03 - 0.05 mm is wound around the outer side of the insulating sleeve.

[0014] As a further solution of the present utility model: the outer side of the cable branch is coated with a sheath. The inner wall of the sheath is connected to one end of the support frame far from the elastomeric support frame, and the material of the sheath is polyetheretherketone, and the outer diameter range is 7.0 ± 0.5 mm.

[0015] Advantages of the present utility model:

[0016] 1. After the cable is pressurized, the Z-shaped support frame provided in the present utility model can collapse within a certain range, playing a good energy absorption role. The provided strengthening strut supports the Z-shaped support frame to prevent excessive deformation. Thus, the Z-shaped support frame 2 and the strengthening strut can provide a good support effect for the cable branch arranged inside, effectively improving the creep resistance of the overall cable.

[0017] 2. By using a conductor wire core made of aluminum alloy conductor and insulating sleeves and sheaths made of polyetheretherketone, the mass of aluminum alloy is approximately one-third of that of a copper cable under the same current-carrying capacity. And the flammability rating of polyetheretherketone is V0 when the thickness is 1.45 mm. The combination of the two can further reduce the weight of the cable, and aluminum alloy has good creep resistance, which can ensure that the cable can withstand high loads for a long time without residual damage, thus maintaining the integrity of the structure. Brief Description of the Drawings

[0018] The following further describes the present utility model with reference to the drawings.

[0019] Figure 1 is the overall three-dimensional schematic diagram of the device in the present utility model;

[0020] Figure 2 is the overall structural schematic diagram of the device in the present utility model.

[0021] In the figure: 1. Elastomer support frame; 2. Support frame; 3. Reinforcing strut; 4. Braided sleeve; 5. Conductor core; 6. Insulation sleeve; 7. Sheath. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0023] As Figure 1-2 shown, a lightweight aerospace aluminum alloy cable includes an elastomer support frame 1.

[0024] It further includes a support assembly. The support assembly includes a plurality of groups of support frames 2 arranged at intervals outside the elastomer support frame 1, and the support frames 2 are Z-shaped. Reinforcing struts 3 symmetrically arranged inside the support frames 2.

[0025] Cable branches. The cable branches include a braided sleeve 4 arranged between the support frames 2. The braided sleeve 4 is woven from silver-plated copper wires, and the braiding density is not less than 80%. Two conductor cores 5 arranged inside the braided sleeve 4, and the conductor cores 5 are twisted together, with the twisting direction being left-handed, and the twisting pitch does not exceed 16 times the twisting outer diameter. The material of the conductor core 5 is an aluminum alloy conductor. An insulation sleeve 6 coated on the outside of the conductor core 5. The material of the insulation sleeve 6 is polyetheretherketone. The nominal thickness of the insulation sleeve 6 is 0.22 mm, and the thinnest point is not less than 85% of the nominal thickness. The extrusion outer diameter range of the braided sleeve 4 is 1.06 - 1.08 mm.

[0026] The Z-shaped support frame 2 undergoes a certain range of collapse under pressure, which can play a good energy absorption role. The provided reinforcing struts 3 support the Z-shaped support frame 2 to prevent it from deforming excessively. Thus, the Z-shaped support frame 2 and the reinforcing struts 3 can provide good support for the cable branches arranged inside it. The braided sleeve 4 woven from silver-plated copper wires has good shielding performance compared to other braided materials, and the braiding density is not less than 85%, which can maximize the shielding of electromagnetic interference, eliminate the potential on the cable surface, and improve the anti-interference ability of the cable. At the same time, on the premise of maintaining certain electrical performance, the purpose of lightweight can be achieved. The conductor core 5 is an aluminum alloy conductor. When the current-carrying capacity is the same, the weight of the aluminum alloy cable is about one-third of that of the copper cable. Using an aluminum alloy cable instead of a copper cable can reduce the cable weight, and the aluminum alloy has good anti-creep performance, which can ensure that the cable does not produce residual damage under high load for a long time, thus maintaining the integrity of the structure. The conductor cores 5 are twisted together, which can effectively reduce the influence of electromagnetic radiation and external electromagnetic interference.

[0027] The material of the insulating sleeve 6 is polyether ether ketone, which has excellent heat resistance and corrosion resistance, can maintain stable performance in the temperature range of -60°C to 260°C, has a flammability rating of V0 when the thickness is 1.45 mm, a limiting oxygen index (LOI) of 35%, and very low toxic gas emissions. It can form good insulation protection for the conductor core 5. The thinnest point is not less than 80% of the nominal value, and the extruded outer diameter is controlled within 1.06 - 1.08 mm, which can further improve the mechanical strength of the cable. The specified thickness can ensure the insulation performance of the cable and prevent the cable from malfunctioning due to mechanical damage during use.

[0028] In this embodiment, specifically, a polyimide composite tape with a thickness of 0.03 - 0.05 mm is wound around the outer side of the insulating sleeve 6, which can effectively prevent the mutually twisted conductor cores 5 from loosening or shifting, avoid being damaged by excessive tension in the aerospace field. On the other hand, it can reduce the corrosion of the external environment and effectively ensure the performance and safety of aerospace vehicles.

[0029] In this embodiment, specifically, a sheath 7 is coated on the outer side of the cable branch. The inner wall of the sheath 7 is connected to the end of the support frame 2 away from the elastomeric support frame 1, and the material of the sheath 7 is polyether ether ketone, with an outer diameter range of 7.0 ± 0.5 mm, which can effectively prevent the cable from being physically damaged during use, ensure that the cable can transmit signals and carry current smoothly, and is more suitable for the performance and safety of aerospace vehicles.

[0030] A detailed description of an embodiment of the present invention has been given above, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A lightweight aluminum alloy cable for aerospace applications, comprising an elastomeric support frame (1), characterized in that: It further comprises a support assembly, the support assembly includes a plurality of groups of support frames (2) arranged at intervals on the outer side of the elastomeric support frame (1), and the support frame (2) is Z-shaped, and reinforcing struts (3) symmetrically arranged inside the support frame (2); Cable branches, the cable branches include a braided sleeve (4) arranged between the support frames (2), two conductor cores (5) arranged inside the braided sleeve (4), and the conductor cores (5) are twisted together, the twisting direction is left-handed, and the twisting pitch does not exceed 16 times the twisting outer diameter, and an insulating sleeve (6) covering the outside of the conductor cores (5).

2. The lightweight aerospace aluminum alloy cable according to claim 1, characterized in that, The braided sleeve (4) is woven from silver-plated copper wire, and the weaving density is not less than 80%.

3. A lightweight aluminum alloy cable for aerospace applications according to claim 1, characterized in that, The material of the conductor core (5) is an aluminum alloy conductor.

4. A lightweight aluminum alloy cable for aerospace applications according to claim 1, wherein, The material of the insulating sleeve (6) is polyether ether ketone, the nominal thickness of the insulating sleeve (6) is 0.22 mm, and the thinnest point is not less than 85% of the nominal thickness. The extrusion outer diameter range of the braided sleeve (4) is 1.06 - 1.08 mm.

5. A lightweight aluminum alloy cable for aerospace applications according to claim 1, wherein, A polyimide composite tape with a thickness of 0.03 - 0.05 mm is wound around the outside of the insulating sleeve (6).

6. The lightweight aerospace aluminum alloy cable according to claim 1, characterized in that, The outside of the cable branch is covered with a sheath (7), the inner wall of the sheath (7) is connected to one end of the support frame (2) away from the elastomeric support frame (1), and the material of the sheath (7) is polyether ether ketone, and the outer diameter range is 7.0 ± 0.5 mm.

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