Thermal design method for extra-planetary rotary cable bunch

A cable harness and thermal design technology, applied in the manufacture of wire harnesses, etc., can solve the problems of winding heating belts and difficulty in implementation, and achieve the effects of improving reliability, simplifying design, and achieving obvious effects

Active Publication Date: 2013-01-16
BEIJING INST OF SPACECRAFT SYST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to meet the temperature requirements of special cables by using conventional passive thermal control methods, and it is difficult to implement general active thermal control methods on cable h

Method used

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  • Thermal design method for extra-planetary rotary cable bunch
  • Thermal design method for extra-planetary rotary cable bunch
  • Thermal design method for extra-planetary rotary cable bunch

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Extraterrestrial activity cable bundle, the cable bundle is C55 series wire, the wire specification is C55 / 012-22, and the power cable core cross section is 0.35mm 2 , the resistivity of the power cable core is 50.5Ω / km; when the cable bundle is working, the power current I=2A passing through the cable bundle is approximately considered to be 2A through the power cable core; in order to ensure that the cable bundle is in a cold space (-269 ℃), it is necessary to keep the temperature of the cable bundle at a level not lower than -25 ℃;

[0027] 1) First, design the extraterrestrial active cable bundle, that is, to isolate the power cable core and the signal cable core and cover the two with insulating layers and multi-layer heat insulation components, such as figure 1 As shown, the Thermal Desktop software is used to establish the thermal analysis model of the cable harness according to the track parameters in Table 1;

[0028] Orbital parameters in Table 1 Embodiment 1...

Embodiment 2

[0041] Extraterrestrial activity cable bundle, the cable bundle is C55 series wire, the wire specification is C55 / 011-20, and the power cable core cross section is 0.5mm 2 , the resistivity of the power cable core is 30.2Ω / km; when the cable bundle is working, the power current I=3A passing through the cable bundle is approximately considered to be 3A through the power cable core; in order to ensure that the cable bundle is in a cold space (-269 ℃), it is necessary to keep the temperature of the cable bundle at a level not lower than -15 ℃;

[0042] 1) First, design the extraterrestrial active cable bundle, that is, to isolate the power cable core and the signal cable core and cover the two with insulating layers and multi-layer heat insulation components, such as figure 1 As shown, the Thermal Desktop software and the track parameters in Table 2 are used to establish the thermal analysis model of the cable harness;

[0043] Orbit parameter in table 2 embodiment 2

[0044] ...

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Abstract

The invention belongs to the technical field of extra-planetary cables, and relates to a thermal design method for an extra-planetary rotary cable bunch. The method is particularly applicable to extra-planetary cables having high requirements on temperature. The method includes: isolating a power cable core and a signal cable core; determining heating power required by the extra-planetary rotary cable bunch through numerical simulation, and designing the length of the power cable core to enable intrinsic heat productivity of the power cable to be the required heating power, so that heat can be completely and reasonably used; and coating a plurality of heat insulating components on the outer surface of the cable bunch. The temperature requirement of cables can be met by means of heating of the power cable core according to intrinsic conditions of the cables, and the method is simple and effective while reliability is improved. According to ground tests, the temperature can be increased by about 100 DEG C when the cable bundle adopting the method is compared with cable bundles taking no measure, and effects are evident. In addition, cables designed by the method are simple in structure and lightweight.

Description

technical field [0001] The invention relates to a thermal design method for extraterrestrial rotating cable bundles, which is especially suitable for extraterrestrial cables with high temperature requirements, and belongs to the technical field of extraterrestrial cables. Background technique [0002] The extraterrestrial cables are currently made of Raychem wires. The insulation and sheath of the cables are made of radiation cross-linked ethylene-tetrafluoroethylene copolymers, which are cross-linked after being irradiated with a certain dose of high-energy electrons. finished product. The temperature range it can withstand is: -100 ~ +200 ° C. Generally, no special treatment is required, and it can adapt to the complex outer space environment directly exposed outside the star. For extraterrestrial active cables, due to the requirement of active functions, long-term activities will cause stress accumulation effect at the junction of cable rotation and static, and the signa...

Claims

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Application Information

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IPC IPC(8): H01B13/012
Inventor 孟恒辉耿利寅谭沧海彭方汉李国强
Owner BEIJING INST OF SPACECRAFT SYST ENG
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