Compound liquid-absorbing core for heat pipe and preforming device thereof and preparation method

A liquid-absorbing core and pre-forming technology, which is applied in the field of heat pipe liquid-absorbing cores, can solve the problems of affecting the pre-forming effect of the liquid-absorbing core, the inability to radially compress the liquid-absorbing core, and poor anti-gravity performance, etc., and achieve convenient processing and low cost Low, simple structure, high permeability effect

Active Publication Date: 2017-06-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grooved liquid-absorbent core has small liquid return resistance, but poor anti-gravity performance; powder sintered liquid-absorbent core has high capillary force, but low permeability and is fragile; wire mesh liquid-absorbent core is easy to prepare, but easy to block and break; fiber Sintered wicks have high permeability but low capillary force
In addition, in the prior art, in terms of the pre-forming of the liquid-absorbing core, the radial size of the mandrel is fixed, and it is impossible to radially compress the liquid-absorbing core, which affects the pre-forming effect of the liquid-absorbing core

Method used

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  • Compound liquid-absorbing core for heat pipe and preforming device thereof and preparation method
  • Compound liquid-absorbing core for heat pipe and preforming device thereof and preparation method
  • Compound liquid-absorbing core for heat pipe and preforming device thereof and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a composite liquid-absorbing core preforming device for heat pipes includes ceramic balls 9, a support frame 1 made of aluminum or steel, several positioning plates fixed on the support frame 1 from top to bottom, vertical The heat pipe shell 6 directly fixed on the positioning plate is coaxially arranged to vertically penetrate the core tube 3 arranged in the heat pipe shell 6, and the two ends of the heat pipe shell 6 are provided with detachable end caps , the tube wall of described core tube 3 is provided with otch along axial direction, adopts wire cutting to cut (see figure 2 and image 3 ), the diameter of the ceramic ball 9 is greater than the inner diameter of the core tube 3.

[0040] Specifically, the positioning plate includes an upper plate 7, a middle plate 4, and a lower plate 2 from top to bottom. The center of the upper plate 7 is provided with a through hole matching the heat pipe shell 6, and the center of the middle pla...

Embodiment 2

[0046]A method for preparing a composite liquid-absorbing core for heat pipes using the preforming device, comprising the steps of:

[0047] (1) Preparation of metal fibers: first cut metal fibers of different shapes into short metal fibers of a certain length, then degrease and dry, then calculate and weigh two kinds of metal fibers of required quality according to a certain ratio, and then mix evenly;

[0048] (2) Position the heat pipe shell 6 and the core tube 3: first insert the tapered end of the lower end cover 5 into the heat pipe shell 6, and press it tightly, and then pass the heat pipe shell 6 through the through hole of the upper plate 7 until It is in contact with the stepped through hole of the middle plate 4, so that the heat pipe shell 6 is matched with the through hole of the upper plate 7, the lower end cover 5 is matched with the stepped through hole with a larger diameter of the middle plate 4, and the lower end cover 5 and the heat pipe shell 6 is axially...

Embodiment 3

[0057] The difference between this embodiment and embodiment 2 is that the metal fiber with a rough surface processed by a multi-tooth turning tool accounts for 20% of the mass of the composite liquid-absorbing core. The short metal fibers have a length of 5 mm and an equivalent diameter of 50 μm.

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PUM

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Abstract

The invention discloses a preforming device for a compound liquid-absorbing core for a heat pipe. The preforming device comprises a ceramic ball, a supporting frame made of an aluminum profile or steel, a plurality of positioning plates sequentially fixed to the supporting frame from top to bottom and a heat pipe casing vertically fixed to the positioning plates. A core pipe arranged in the heat pipe casing in a vertical penetrating mode is coaxially arranged, the two ends of the heat pipe casing are provided with detachable end covers, the pipe wall of the core pipe is axially provided with a notch, and the diameter of the ceramic ball is larger than the internal diameter of the core pipe. The invention further provides the compound liquid-absorbing core for the heat pipe and a preparation method thereof. The preforming device is simple in structure and convenient to operate. According to the method for preparing the compound liquid-absorbing core for the heat pipe, radial compaction of the compound liquid-absorbing core can be implemented, it is ensured that the compound liquid-absorbing core and the pipe casing are effectively sintered, and contact thermal resistance is reduced. The prepared compound liquid-absorbing core for the heat pipe is excellent in heat transfer performance, high in permeability, large in capillary force, excellent in antigravity performance, low in cost and suitable for industrial scale production.

Description

technical field [0001] The invention relates to the technical field of heat pipe liquid-absorbent cores, in particular to a composite liquid-absorbent core for heat pipes, a preforming device and a preparation method thereof. Background technique [0002] Based on the urgent requirements of energy storage and consumption and environmental protection in the world today, effective, reliable, economical and practical energy-saving technologies are becoming more and more popular, and heat pipe technology is one of the options available in energy-saving technologies. The heat transfer performance of the heat pipe mainly depends on the structure of the wick. Commonly used wick structures for heat pipes mainly include grooved wicks, powder sintered wicks, wire mesh wicks and fiber sintered wicks. Grooved liquid-absorbent core has small liquid return resistance, but poor anti-gravity performance; powder sintered liquid-absorbent core has high capillary force, but low permeability a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02F28D15/04
CPCF28D15/0275F28D15/043F28D15/046
Inventor 汤勇曹睿陈灿万珍平林浪唐恒陆龙生袁伟李宗涛
Owner SOUTH CHINA UNIV OF TECH
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