A New Electric Heating Type Suction Element

A new type of electric heating technology, which is applied in the direction of suction, electric tube/lamp degassing, container pressure maintenance, etc., can solve the problems of high-impact small electric vacuum device vacuum maintenance, powder dropping of suction components, and inconvenient assembly, etc., to achieve The effect of wide activation temperature range, excellent suction performance and convenient assembly

Active Publication Date: 2019-07-19
GRIMAT ENG INST CO LTD
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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 new type of electric heating suction element to overcome the shortcomings of existing suction elements such as powder dropping, inconvenient assembly, and broken wires, and to solve the vacuum maintenance problem of small electric vacuum devices under high impact and strong vibration conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A nickel-chromium alloy tube with a wall thickness of 20 μm and a diameter of 1 mm is used. The cross-section of the sleeve is circular, and laser drilling is used to form a lattice network structure. The diameter of the microholes is 40 μm, and the radial spacing is 0.1 mm. The total length of the tube is 14mm, and the total micropore area accounts for 9% of the total surface area of ​​the alloy tube; the alloy tube is filled with zirconium vanadium iron getter material with a diameter of 60-100 μm, and the packing density is 4.6mg / mm 3 ; The two ends of the alloy tube are directly sealed and used as electrodes and support frames; the suction rate of the suction element is as high as 4820Pa.ml / g in ten minutes after activation at 400 ° C, with good suction performance. The suction element is subjected to an impact test with an impact acceleration of 500g, a frequency range of 20-2000Hz, and a power spectral density of 0.12g 2 Under the condition of random vibration of ...

Embodiment 2

[0017] A nickel-chromium alloy tube with a wall thickness of 50 μm and a maximum diameter of 3 mm is used. The cross-section of the sleeve is elliptical, and laser drilling is used to form a lattice network structure. The diameter of the microholes is 100 μm, and the radial spacing is 0.1 mm. The total length of the alloy tube is 6mm, and the total micropore area accounts for 30% of the total surface area of ​​the alloy tube; the alloy tube is filled with zirconium vanadium manganese getter material with a diameter of 120-150μm, and the filling density is 3.2mg / mm3; the end of the alloy tube is spot welded with nickel The strip is used as an electrode and a support frame after the transition; the suction rate of the suction element is as high as 5147Pa.ml / g in the tenth minute after activation at 500 ° C, which has good suction performance. The suction element is subjected to an impact test with an impact acceleration of 500g, a frequency range of 20-2000Hz, and a power spectra...

Embodiment 3

[0019] The iron-chromium-aluminum alloy tube with a wall thickness of 40 μm and a diameter of 5 mm is used. The cross-section of the sleeve is elliptical, and laser drilling is used to form a lattice network structure. The diameter of the microholes is 10 μm, and the radial spacing is 0.15 mm. The total length of the alloy tube is 10mm, and the total micropore area accounts for 10% of the total surface area of ​​the alloy tube; the alloy tube is filled with zirconium aluminum getter material with a diameter of 60-100μm, and the filling density is 4.1mg / mm 3 The end of the alloy tube is spot-welded with nickel wire and then used as an electrode and support frame; the suction rate of the suction element is as high as 4086Pa.ml / g in ten minutes after activation at 700 ° C, which has good suction performance. The suction element is subjected to an impact test with an impact acceleration of 500g, a frequency range of 20-2000Hz, and a power spectral density of 0.12g 2 Under the cond...

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Abstract

The invention discloses a novel electric heating air suction element, comprising a metal alloy pipe and an air suction alloy material filled in the pipe, wherein a plurality of micropores are formed in the wall of the metal alloy pipe and arranged in a dot matrix netlike structure; the air suction alloy material is not sintered, and the particle diameter of the air suction alloy material is greater than the diameters of the micropores in the wall of the metal alloy pipe. The novel air suction element is composed of a metal alloy pipe and an air suction alloy, and the air suction alloy not sintered is directly assembled and used, so the process is simple and easy to operate; the non-sintered air suction alloy has large specific surface area and porosity, and excellent air suction performance; the air suction element has high strength, can adapt to severe environments of impact, vibration, friction and the like, and the air suction material is not restricted by the overall strength of the element, so the optional range is wide and the activation temperature range is wide; and the air suction element formed integrally is simple in structure and adjustable in size, and can be controlled accurately.

Description

technical field [0001] The invention relates to a novel electric heating suction element, which belongs to the technical field of electric vacuum suction elements. Background technique [0002] The suction element is a functional element used in electric vacuum devices to absorb various impurity gases in the vacuum tube. It is mainly used to maintain and increase the vacuum degree in the tube to ensure a good vacuum state of the device, prolong the service life and improve the reliability of the device. [0003] There are great differences in the internal space structure and size of various electric vacuum devices, and there will be different requirements for the size, strength, and activation methods of the getter components. High overall strength, no powder shedding, easy installation and easy activation. In response to the needs of various electric vacuum devices, two types of getter components are mainly developed at present: one is the getter component activated by ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/39
CPCH01J9/39H01J2209/385
Inventor 张艳杨志民崔建东苑鹏陈博昊吴然嵩崔航
Owner GRIMAT ENG INST CO LTD
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