Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF5 Cites 6 Cited by
  • Summary
  • 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 harnesses, especially for cables that rotate outside the planet, it is impossible to wrap heating tape on them. Therefore, special thermal control measures must be taken for the cable to ensure its temperature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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
Comparison scheme
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] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com