JPS5960976A - Method of energizing cable slip ring for power cable - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for energizing a slip ring of a cable reel for a power cable. In particular, the present invention relates to a method for energizing a slip ring of a cable reel for a power cable, which can ensure conduction at a contact portion.

The cable reel power supply system basically performs contact power supply while the brush slides relative to the slip ring.
It uses a so-called slip ring method. However, in the case of cable reels, power is often supplied while the slip ring and Cyrano have stopped (relative) rotation. That is, in many cases, power is supplied while the reel is stationary with the entire cable wound around the reel or the cable extended over the entire length or an arbitrary length. The contact resistance in a stationary state is always greater than the contact resistance in rotation, except immediately after stopping. Conventionally, when a cable reel is energized for a long time in a stationary state without sliding between brush springs, uneven contact on the contact surface causes circumferential discharge - Occurrence of rough skin - Increase in contact resistance - Occurrence of overheating. Through the process of accelerated oxidation and increased local discharge, failure of current conduction may occur.

As a countermeasure to this problem, the material of the brush should be changed to soft cardanshira/
Countermeasures have been proposed, such as changing to a copper block of @1 quality and applying silver plating to the block, and also applying silver plating to the slip ring, and increasing the contact pressure between the two parts. However, silver plating has the disadvantage that it is expensive, easily peels off, and disappears due to wear. Also, replacing the brush with a copper block or increasing the contact pressure causes a lot of wear and tear on the contact surface on the slip ring side, so these measures ultimately result in a cable reel that is trouble-free whether the reel is used in rotation or in stationary use. It cannot be said that it is sufficient to meet the requirements.

In other words, while adopting the slip ring method that conventionally requires rotating (sliding) use, it can be used in a stationary state as it is! There is a problem with conventional cable reels in that even tigers are intended to be used for a long period of time, and a solution to this problem is desired.

The present invention has been made in response to such demands.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for energizing a slip ring of a cable reel, which eliminates the drawbacks of the prior art described above and does not cause any abnormality even if the cable reel is energized (operated) for a long period of time in a non-rotating state. There is a particular thing.

That is, the present invention provides a slip ring threading method for a cable reel for an electric power cable in which current is supplied by a slip ring and a brush, in which a conductive rotating body is provided between the slip ring and the brush and rotates while contacting them. This is a method for energizing a slip ring of a cable reel, which is characterized in that the rotating body is interposed between the two and rotated intermittently between the two.

As described above, according to the present invention, if a conductive rotating body is interposed between the slip ring and the plan and the rotating body is rotated intermittently, even if the both are energized in a stationary state,
Substantially the same effect is produced as if the two were intermittently slid, and the drawbacks of the prior art described above can be overcome.

The present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a conventionally used cable reel, showing a slip ring section in cross section. In step 5, the cable 2 side is set as the input side, and the cable 1 side is set as the load side (the reverse may also be the case). The input voltage is usually 600V or less, but there are also cases of high voltage cable reels of 3,000V or 6.00V, for example. The current is typically less than 100 amps. The cable reel is generally composed of a cable reel collar 3 and a reel body, and is rotatably mounted on a stand 5 by a reel/gift 7 via a ball bearing 6. A slip ring portion 9 is provided at one end of the reel shaft 7 and is housed within a case 8. Input power from cable 2 is sent to slip ring 9 and brush 10
and enters cable I from the tip of cable 1. The slip ring 9 is configured to be rotatable, and there is no problem if the slip ring 9 and the brush 10 are energized while sliding. If energization is carried out in a state where no movement is made, the contact resistance between the two increases as described above, causing overheating, and eventually energization becomes impossible.

FIG. 2 is an explanatory diagram showing the principle of the present invention.

In order to eliminate the above-mentioned drawbacks, in the slip ring part of the 6 cable reel, an insulating rotor 1-''15 that rotates between the slip ring 9 and the plano lO while being in contact with both.
A conductive rotating body 12 coupled to the body is interposed, for example, a deceleration motor 13, a rotating arm 14, and a knob ring 16.
The rotary body 12 is rotated between the two by a distance L.

FIG. 3 is a longitudinal cross-sectional view showing one embodiment of a slip ring portion implementing the present invention, and FIG. 4 is a cross-sectional view taken along the line AA and ' in FIG. 3. (Please note that Figure 3 is 13-1 in Figure 4.
It is a sectional view taken along the line 13'. ) In the embodiment shown in FIG. 3, the slip ring part 9 and the plan part 10 are formed in a ring shape, and the rotating body I2 interposed between the slip ring part 9 and the plan part 10 is
takes the form of Cyrano. There are several examples in 7. The cylinder of a rotating body is a cylinder/holder made of a conductive material.
The bluff surface is configured to slide while contacting the slip ring 9 and the ring-shaped brush 1o, respectively, and to conduct electricity between the two both when sliding and when stationary. As shown in FIG. 4, the three rotating bodies 12 have their respective holders 17 coupled together by an insulating cup 9728 member 18, and a removable coupling 1 of the rotary arm 14 of the deceleration motor 3.
It is also connected to 6. The rotating body is used for polishing the sliding surfaces of the slip ring 9 and the sill/9, and is 1
Intermittent use is sufficient to achieve the purpose. Therefore 1
The rotating body is generally driven by a deceleration motor.1. The rotating arm 14 is separated from the rotating body by the detachable coupling 16 except when driving. This operation prevents the deceleration motor from rotating due to the rotation of the reel.

In the above embodiment, the slip ring 9 and the silane 10 have a ring shape, and the rotating body has a shell shape, but
For example, if the sill/10 is a conventional sill/(1) structure, the portion that slides with the sill/10 of the one-rotation body may be formed into a ring shape.

For the slip ring and shield used in the present invention, the same materials as those used in the past can be used. Slip rings include the same, the same alloy, aluminum alloy,
Stainless steel or the like is used for the brush, and carzene, sintered alloy, or the like is used for the brush. Further, the conductive rotating body used in the present invention can be appropriately selected from the above-mentioned materials depending on its configuration (silver-like or ring-like).

As described above, according to the present invention, there is no problem even if the cable reel is energized for a long period of time in a stationary state.
There is no problem even if it is used while the reel is rotating. That is, by rotating the rotating body by an appropriate 114 degrees, the sliding sound is renewed each time, and it is possible to prevent an increase in contact resistance due to energization in a stationary state.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional cable reel (the slip ring part is a sectional view), Fig. 2 is an explanatory diagram showing the principle of the present invention, and Figs. 3 and 4 are a spring ring part for a cable reel used in the present invention. It is a sectional view showing one example. 1-'y-7-le load side, 2 cable input side, 9
Slip ring,】0 Shira/, ■2 times iE body,
13 Deceleration motor, 14 Rotating arm, 15 Rod, 16 Coupling, 17 Brush boulder 118
Insulating coupling member. Kidney 1 Figure 3 Kidney Z orifice 4 Figure No. 8

Claims (1)

[Claims] (1) In a slip ring energization method for a cable reel for an electric power cable, in which energization is carried out by a slip ring and a brush, a conductive rotating body that rotates while contacting both is interposed between the slip ring and the plan, A method for energizing a cable slip ring for a power cable, characterized by rotating the rotating body between the two intermittently.