JPS61277181A - Slip ring unit for high voltage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a slip ring for supplying power or electrical signals to rotating electrodes.

[Technical background of the invention and its problems] Conventionally, for diagnostic reasons, for example, a CT scanner for taking a tomographic image of a subject has been used to obtain a tomographic image of the subject on which the CT scanner is installed. Continuous rotation of the detection unit is required. The above-mentioned CT display equipment used a high-voltage cable to supply high voltage to the detection part, but since the high-voltage cable could not be used for equipment that rotates continuously in one direction, slip rings were used. ing. Said C
T-table device A compact, high-voltage slip ring device with high voltage resistance is required for installation in hospitals.

Conventionally, when comparing the withstand voltage between rod-shaped electrodes or between electrodes with sharp etches and between flat electrodes, it has been found that the withstand voltage of rod-shaped electrodes or electrodes with sharp etches is significantly lower than that of flat electrodes. It is known to show,
For example, if the electrodes of a device that applies high voltage are damaged during assembly, transportation, or maintenance, problems such as not being able to obtain a predetermined withstand voltage value may occur due to the damage. was there.

[Object of the Invention] The present invention has been made in view of the above circumstances, and is formed of a rotating member and a fixed member made of aluminum, and includes at least a slip ring mounting surface of the fixed member and a power supply member mounting surface of the rotating member. The purpose is to improve the withstand voltage of high-voltage slip ring devices by applying alumite treatment to the material.

[Summary of the Invention] A summary of the present invention for achieving the above object is that the invention is formed of a rotating member and a fixed member made of aluminum, and at least a slip ring mounting surface of the fixed member and a power supply member mounting surface of the rotating member. It is characterized by having been subjected to alumite treatment.

[Embodiment of the Invention] FIG. 1 is an assembly diagram including a cross section of the processing device. In the same figure, the high voltage slip ring device includes a fixed frame 1 fitted with a high voltage bushing 4 having a contact point 8 provided on the head thereof to be electrically connected to a cap 5 and included in the cap 5. , a slip ring 6 fixed to the fixed frame 1 and electrically connected via the contacts 8; and a slip ring brush 9 provided in contact with the slip ring 6 and enclosed in the cap 7. It is composed of a high-pressure bushing 10 having the slip ring brush 9 on its head, and a rotating frame 2 which is fitted with the high-pressure bushing 10 and rotatably held by a fixed frame 1 via a bearing 3.

In the above configuration, the fixed frame 1, the rotating frame 2, the cap 5, and the cap 7 are made of aluminum,
The surface of the rotating frame 2 to which the high-pressure bushing 10 is fitted and the fixed frame 1 to which the high-pressure bushing 4 is fitted
An alumite treatment is performed to form a dense oxide film on the surface and at least the outer surfaces of the caps 5 and 7. Aluminum treated with alumite (hereinafter referred to as alumite) can suppress electron emission under high voltage, making it possible to provide a compact high-voltage slip ring device, and the surface hardness of alumite is higher than that of ordinary steel. Therefore, even if damage occurs during assembly, transportation, or maintenance, which causes a drop in pressure resistance, the alumite treatment can prevent the pressure resistance from dropping.

The present invention is not limited to the above embodiments, but can be implemented with various modifications within the scope of the gist of the present invention.

[Effects of the Invention] As detailed above, the present invention includes a rotating member and a fixed member made of aluminum, and at least the slip ring mounting surface of the fixed member and the mounting surface of the power supply member of the rotating member are anodized. By applying this method, it is possible to provide a high voltage slip ring device with significantly improved withstand voltage.

FIG.

1... Fixed frame, 2... Rotating frame, 3...
・Bearing, 4...High pressure bush, 5...Cap, 6...Slip ring, 7...Cap, 8...
...Contact, 9...Slip ring brush, 10...High pressure bush.

Claims (1)

[Claims] A high voltage slip ring device comprising a rotating member and a fixed member made of aluminum, and characterized in that at least a slip ring mounting surface of the fixed member and a power supply member mounting surface of the rotating member are anodized.