X-ray bulb tube

Abstract

The invention relates to an X-ray bulb tube. The X-ray bulb tube comprises a target disc and a rotating part used or driving the target disc to rotate, wherein the target disc comprises a target surface which can produce X rays under impact of electrons, and a locating slot is also limited at central axis of the target disc at a side opposite to the target surface, so that an annular gap is defined between the locating slot and the circumferential side wall of the rotating part when the rotating part is fixedly arranged on the target disc, a heat-resistant plate is also arranged between the rotating part and the target disc, and the heat-resistant plate is fixedly arranged on the target disc in the annular gap. According to the invention, the heat-resistant plate of the X-ray bulb tube is fixedly arranged on the target disc and is not in surface contact with the rotating part, so that strength of the rotating part can be strengthened, and conduction of temperature of a reflecting piece onto a fixed shaft is also effectively reduced.

Description

technical field [0001] The invention relates to the field of X-rays, in particular to an X-ray tube for generating X-rays. Background technique [0002] X-ray tube (X-ray tube) can generate X-rays used to generate fluoroscopic images. In the process of generating X-rays, such as CT (Computed Tomography) imaging equipment, high-speed electrons in the X-ray tube bombard the target On the disk, the temperature of the target disk rises. In order to avoid the damage of the target disk due to the temperature rise, the general method is to use the motor to drive the target disk to rotate at a high speed (the speed can reach 6000 rpm), so that the target disk is evenly heated. , to avoid cracking of the target disc. [0003] Because the high temperature of the target disk will be conducted and radiated to the rotor of the motor and the bearing fixed to the rotor, and the high-speed rotating friction of the bearing fixed to the rotor of the motor will also increase the temperature o...

AI Technical Summary

Problems solved by technology

However, this method of screwing the heat shield 10 on the thin-walled shaft 41 will cause the heat shield 10 to be in surface contact with the rotating part 40, so that the heat on the heat shield 10 is conducted to the rotating part 40 through the thin-walled shaft 41, It affects the life of the rotating part 40. At the same time, in order to install the heat-resistant plate 10 on the thin-walled shaft 41, threads should be provided on the thin-walled shaft 41, which further reduces the thickness of the thin-walled shaft 41 and affects the thin-walled shaft 41. The rigidity of the wall shaft 41 may even cause the thin-wall shaft 41 to break during high-speed rotation

[0005] In some other schemes, in order to strengthen the rigidity of the thin-walled shaft 41, a protruding ring (not shown) is provided on the thin-walled shaft 41, and threads are provided on the protruding ring to screw the heat shield 10 On the protruding ring, but the heat resistance effect of this structure is not ideal (the heat resistance plate is connected to the rotating part), and the manufacturing process is complicated

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