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Method for preparing liquid-absorbent core by pressure sintering method

A pressurized sintering and liquid-absorbing core technology, applied in lighting and heating equipment, indirect heat exchangers, etc., can solve problems such as uneven porosity and shrinkage during sintering, so as to improve the uniformity of porosity and avoid shrinkage problems Effect

Active Publication Date: 2021-04-16
贵州宇源新能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a liquid-absorbent core to solve the problems of serious shrinkage and uneven porosity in the sintering process in the prior art. The present invention combines continuous powder addition, induction heating, and pressure sintering Ways to prepare wicks

Method used

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  • Method for preparing liquid-absorbent core by pressure sintering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The metal tube shell is made of 18*3 metal titanium tube; the metal layer (1) is made of porous stainless steel with a pore diameter of

[0022] 13μm, the porosity is 65%. The metal powder is nickel powder with a particle size of 2 μm.

[0023] Such as figure 1 As shown, the porous stainless steel is inserted into the titanium tube with the lower end fixed. Nickel powder from the feeding device

[0024] Pour from above, set the motion period of the feeding device to 1 s, the pressing pressure of the feeding device on the metal powder is 2MPa, and the frequency of the induction coil is 1000 HZ.

[0025] The moving speed of the titanium tube is 0.2 cm / s. To be sintered with nickel powder between the titanium tube and the porous stainless steel

[0026] After the liquid-absorbent core, stop each equipment, and the preparation of the liquid-absorbent core can be completed.

Embodiment 2

[0028] 22*3 metal copper pipes are selected for the metal shell; porous stainless steel is selected for the metal layer (1), and the aperture is

[0029] 20μm, the porosity is 55%. The metal powder is nickel powder with a particle size of 5 μm.

[0030] Such as figure 1 As shown, the porous stainless steel is inserted into the copper tube, and the lower end is fixed. Nickel powder from the feeding device

[0031] Pour from above, set the motion cycle of the feeding device to 2 s, the pressing pressure of the feeding device on the metal powder is 3 MPa, and the frequency of the induction coil is 2000 HZ.

[0032] The moving speed of the titanium tube is 0.1 cm / s. After the copper tube and the porous stainless steel are filled with copper powder and sintered

[0033] After the liquid-absorbent core, stop each equipment, and the preparation of the liquid-absorbent core can be completed.

Embodiment 3

[0035] The metal tube shell is made of 16*1 metal copper tube; the metal layer (1) is made of porous copper, and the aperture is

[0036] 15μm, the porosity is 55%. The metal powder is copper powder with a particle size of 1 μm.

[0037] Such as figure 1 As shown, the porous copper is inserted into the copper pipe, and the lower end is fixed. Copper powder from the feeding device

[0038] Pour from above, set the motion period of the feeding device to 3 s, the pressing pressure of the feeding device on the metal powder is 1 MPa, and the frequency of the induction coil is 1500 HZ.

[0039] The moving speed of the titanium tube is 0.4 cm / s. The suction liquid that is filled with copper powder and sintered between the copper tube and the porous copper

[0040] After the core is finished, all equipment is stopped to complete the preparation of the liquid-absorbent core.

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Abstract

The invention discloses a method for preparing a liquid-absorbing wick by pressure sintering. The liquid-absorbing wick is composed of a metal tube shell, a capillary tube (1) and a capillary tube (2). The capillary (1) is inserted into the metal tube shell to form a cavity, and the feeding device reciprocates up and down at a high speed to continuously load the metal powder into the cavity at a very small speed and compact it, and sinter the metal powder through high-frequency induction heating. , to realize the one-step preparation of the wick, and the whole process is completed under vacuum. The present invention performs pressure sintering and high-frequency induction simultaneously, which can not only avoid the shrinkage problem in conventional sintering, make the capillary tube (2) closely fit with the metal tube shell, but also effectively improve the porosity uniformity of the capillary core (2). In addition, the conventional method of the liquid-absorbent core is to assemble the metal outer tube and the liquid-absorbent core, which requires extremely high matching dimensions of the two. The present invention can avoid this problem by one-step sintering.

Description

technical field [0001] The invention relates to a method for preparing a liquid-absorbing core by a pressurized sintering method, which can be applied to the fields of aviation thermal control and cooling of electronic equipment. Background technique [0002] Loop heat pipe is a high-efficiency two-phase thermal control technology. With its high-efficiency heat transfer rate, long-distance transmission, good isothermal performance, and flexible and convenient structural design, it has become the preferred choice in the field of heat exchange for aerospace and high-density electronic equipment. Cooling, heat recovery, and air-conditioning and refrigeration are increasingly being used. [0003] A typical heat pipe consists of a tube shell, a liquid-absorbing core and an end cap. The negative pressure in the tube is filled with an appropriate amount of working liquid, so that the capillary porous material of the liquid-absorbing core close to the inner wall of the tube is fille...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D15/04
CPCF28D15/046
Inventor 俞健杨佳辉沈芳洁
Owner 贵州宇源新能科技有限公司
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