Rotary anode target for X-ray tube, preparation method and target assembly

A rotating anode and X-ray technology, which is applied to X-ray tube electrodes, X-ray tube components, X-ray tubes, etc., can solve the problems of affecting the life of X-ray tubes, affecting the life of bearings, and the temperature rise of metal balls. Avoid direct heat radiation, improve the service life, and have the effect of high loading power

Pending Publication Date: 2019-12-10
安泰天龙钨钼科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, part of the heat is inevitably transferred to the anode bearing through heat conduction and heat radiation, which makes the temperature of the metal ball rise.
If the heat transferred by heat conduction or heat radiation is too much, it will cause the metal ball to exceed the limit operating temperature, which will cause the bearing to be stuck, resulting in the failure of the entire X-ray tube
[0003] The traditional rotating anode X-ray tube reduces heat conduction by reducing the wall thickness of the shaft connecting the target disk and the bearin

Method used

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  • Rotary anode target for X-ray tube, preparation method and target assembly
  • Rotary anode target for X-ray tube, preparation method and target assembly
  • Rotary anode target for X-ray tube, preparation method and target assembly

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preparation example Construction

[0073] The invention also discloses a method for preparing a rotating anode target for an X-ray tube, comprising the following steps:

[0074] A. Roughening treatment on the surface of the weldment:

[0075] The surfaces to be welded of the target surface layer 3 and the substrate 2 are subjected to straight grain or net knurling treatment, and the depth of the straight grain or net knurling treatment is 0.1-0.2 mm.

[0076] B. High temperature vacuum degassing treatment:

[0077] After the treatment in step A, the target surface layer 3, the substrate 2 and the annular cover 4 are cleaned, and the cleaned target disk 1, the substrate 2 and the annular cover 4 are placed in a vacuum furnace for high-temperature vacuum degassing treatment. The gas treatment temperature is 1400-1600°C (such as 1420°C, 1450°C, 1480°C, 1500°C, 1520°C, 1550°C, 1580°C), and the holding time is 30-60min (such as 35min, 40min, 45min, 50min, 55min ), the vacuum degree of vacuum degassing treatment is...

Embodiment 1

[0084] The rotating anode target assembly of this embodiment is such as figure 1 As shown, it includes a target disk 1 , an annular cover 4 , a rotating shaft 5 and a bearing assembly 6 . The metal balls 9 in the bearing assembly 6 are dry-lubricated with silver, and the corresponding limit operating temperatures are 450°C.

[0085] The preparation process of the rotating anode target in this embodiment is as follows:

[0086] A. Roughening treatment on the surface of the weldment:

[0087] The surfaces to be welded of the target surface layer 3 and the base body 2 that meet the size requirements of the target disc 1 after machining are subjected to knurling treatment, and the depth of the knurling is 0.15mm.

[0088] B. High temperature vacuum degassing treatment:

[0089] After the treatment in step A, the target surface layer 3, the substrate 2 and the annular cover 4 are cleaned, and the cleaned target disk 1, the substrate 2 and the annular cover 4 are placed in a vacu...

Embodiment 2

[0099] The anode target assembly of the present embodiment is as figure 2 As shown, it includes a target disk 1 , an annular cover 4 , a rotating shaft 5 and a bearing assembly 6 . The metal balls 9 in the bearing assembly 6 are dry-lubricated with silver, and the corresponding limit operating temperatures are 450°C.

[0100] The preparation process of the present embodiment target disc 1 is:

[0101] A. Roughening treatment on the surface of the weldment:

[0102] The surfaces to be welded of the target surface layer 3 and the substrate 2 that meet the size requirements of the target disc 1 after machining are subjected to knurling treatment, and the depth of the knurling is 0.20 mm.

[0103] B. High temperature vacuum degassing treatment:

[0104] After the treatment in step A, the target surface layer 3, the substrate 2 and the annular cover 4 are cleaned, and the cleaned target disk 1, the substrate 2 and the annular cover 4 are placed in a vacuum furnace for high-temp...

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Abstract

The invention provides a rotary anode target for an X-ray tube, a preparation method and a target assembly. The anode target comprises a target disc and an annular cover. The target disc comprises a substrate and a target surface layer covering the substrate. A first center hole is formed in the center of the substrate. A second center hole is formed in the center of the target surface layer. Theannular cover covers the inner circumferential side wall of the first center hole and is connected with the substrate, and the annular cover is used for reducing or blocking the diffusion of the heatemitted by the substrate. The rotary anode target can reduce the heat transmitted to a rotating shaft or a bearing in a heat radiation mode, obviously reduces the temperature of a metal ball, and prolongs the service lives of the bearing and the X-ray tube. Moreover, the power continuously loaded by the X-ray tube is higher, and more patients can be scanned in unit time.

Description

Technical field [0001] The invention relates to the technical field of preparing components for high-performance medical devices, and in particular to a rotating anode target for X-ray tubes, a preparation method and a target assembly. Background technique [0002] X-ray tubes are used to generate X-rays and play an important role in various fields such as medical diagnosis, safety inspection and non-destructive testing. The basic principle of the X-ray tube is that the hot electrons excited by the heating of the cathode filament hit the target disk under the action of the cathode and anode accelerating electric fields. 1% of the energy is converted into X-rays, and the remaining 99% of the energy is converted into heat energy. , causing the temperature of the impacted area to rise rapidly. In the fixed anode X-ray tube, electrons continue to hit the same position, causing the local temperature of the fixed anode X-ray tube to rise rapidly. Although it can be continuously l...

Claims

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Application Information

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IPC IPC(8): H01J35/10H01J9/02
CPCH01J9/02H01J35/101H01J35/105
Inventor 董帝刘国辉熊宁王寅梁俊才
Owner 安泰天龙钨钼科技有限公司
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