JP3069080U - Slip ring system - Google Patents

Abstract

(57) [Problem] To provide a slip ring system for high-speed rotation, which can prevent insulation deterioration between adjacent brush holders and can extend a maintenance interval. SOLUTION: A plurality of slip rings 1 arranged coaxially adjacent to each other and rotating at high speed, and each of the slip rings 1
Brushes 2 that come into contact with the outer peripheral surface with a predetermined urging force, brush holders 3 that individually hold the brushes 2, and support a plurality of the brush holders 3. A slip ring system including at least one brush bolt 4, wherein an insulating member 5 is arranged between the adjacent brush holders 3 so that the brush bolt 4 is fitted therein. The insulating member 5 is provided with a brim-shaped blocking portion 5a at a central portion in the axial direction, and has a size expanded so as not to contact the outer peripheral surface of the slip ring 1. Both ends T in the axial direction are fitted to the inner peripheral surface of the inner fitting.
, A cylindrical space 5b having an inner diameter larger than the inner diameter of the inner peripheral surface is formed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a slip ring system that rotates at high speed and has a configuration in which a plurality of brush holders are supported by brush bolts.

[0002]

[Prior art]

 In general, the slip ring system includes at least one brush holder that individually holds brushes elastically contacting the outer peripheral surfaces of a plurality of high-speed rotating slip rings and is arranged in parallel with the axial direction of the slip rings. The brush bolts are arranged in a line at equal intervals. In this slip ring system, the insulation between adjacent brush holders may be degraded by wear powder generated due to brush wear, but drastic measures have been taken to prevent this. However, it has not been proposed. Nevertheless, in order to prevent such insulation deterioration of the slip ring system, a brush that is durable against abrasion has conventionally been used, so that the maintenance time can be extended or the interval between maintenance operations can be extended. Although the length is relatively short and the number of times is increased, cleaning is performed before the insulation between the brush holders is deteriorated to remove brush abrasion powder.

[0003]

[Problems to be solved by the invention]

 However, in the above-mentioned conventional slip ring system, it is troublesome and time-consuming to frequently perform cleaning maintenance for removing brush abrasion powder in a short period of time. Therefore, it is desirable to extend the maintenance period by using a brush that is durable against abrasion, but there is a limit to the durability against abrasion of the brush.

The present invention solves the above-mentioned disadvantages of the conventional example, can prevent the deterioration of insulation between adjacent brush holders, and can extend the interval between maintenance operations. It is an object of the present invention to provide a slip ring system.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a plurality of slip rings arranged coaxially adjacent to each other and rotating at a high speed, a brush contacting the outer peripheral surface of each slip ring with a predetermined urging force, and a brush. A slip ring system comprising: a brush holder which is individually held; and at least one brush bolt which supports a plurality of the brush holders and is arranged in parallel with an axial direction of the slip ring. An insulating member is arranged between the brush holders so that the brush bolts are internally fitted. This insulating member is provided with a brim-shaped blocking portion at a central portion in the axial direction, has a size expanded so as not to contact the outer peripheral surface of the slip ring, and fits the brush bolt therein. A cylindrical space having an inner diameter larger than the inner diameter of the inner peripheral surface is formed on the inner peripheral surface except for both ends in the axial direction.

[0006] As described above, by providing the brim-shaped blocking portion in the insulating member, the wear powder caused by the sliding of the slip ring against the brush is blocked so as not to be scattered to the adjacent brush holder, and the friction powder is dragged. The length is shortened, so that the inside of the insulating member is difficult to be connected by abrasion powder. In addition, the insulating property is maintained even if the length of the cylindrical space is shifted and the pseudonym length is already pulled.

[0007]

[Embodiment of the invention]

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of a slip ring system showing an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view showing a main part including an insulating member of FIG.

In FIG. 1, a slip ring system is arranged coaxially adjacent to each other, and a plurality of (eight in this embodiment) slip rings 1 rotating at a high speed, and a predetermined urging force applied to each slip ring 1. Brushes 2 that are in contact with each other, a brush holder 3 that holds the brushes 2, four brush holders 3 each being supported, and two brush bolts 4 that are parallel to the axial direction of the slip ring 1. And an insulating member 5 disposed substantially adjacent to both sides so as to fit the brush bolts 4 therein.

As shown in FIG. 2, the insulating member 5 has a cylindrical shape in which the brush bolt 4 is fitted, has an axial length L, and has an outer diameter R at a central portion in the axial direction. A brim-shaped blocking portion 5a is provided. On the inner peripheral surface side of the insulating member 5, there is provided a cylindrical space having an inner diameter slightly larger than the inner diameter of both ends, leaving a length T at both ends in the axial direction. The insulating space 5b does not contact the surface of the bolt 4. There is a slight difference (L <P) between the axial length L of the insulating member 5 and the distance P between the two brush holders 3 arranged with the insulating member 5 interposed therebetween (L <P). Allowance for the placement of That is, the insulating member 5 has a slight asobi S in the axial direction with respect to the adjacent brush holder 3.

In the above-described configuration, the blocking portion 5 a of the insulating member 5 blocks the wear powder generated by the sliding of the slip ring 1 against the brush 2 so as not to be scattered in the direction of the adjacent brush 2, and accumulates the wear powder. Even if the brush holders 3 are separated, the brush holders 3 and the ground are reliably insulated. The larger the outer diameter R of the blocking portion 5a of the insulating member 5 is, the larger the outer diameter R of the abrasion powder by the brush 2 is.

Further, since the insulating member 5 has an asobi S in the axial direction with respect to the adjacent brush holder 3, a worker erroneously applies a force to the insulating member 5 at the time of maintenance, so that the position thereof is reduced. May be moved. There is a possibility that abrasion powder of the brush 2 may enter the inside of the insulating member 5 due to the movement of the insulating member 5, but in this case, it is conceivable that the abrasion powder entered enters the insulating space 5b and stays there. By this action, an insulating effect on the adjacent brush holder 3 is exhibited. In this case, assuming that the insulation distance between adjacent brush holders 3 when the insulation member 5 is not disposed is D, the insulation member 5 is moved as described above, and abrasion powder enters the interior. Even in this case, in order to sufficiently exhibit the insulating effect, it is necessary to set each of the insulating members 5 so as to satisfy the following condition: (2 ・ LP-2 ・ T) = (L-2T)-(PL)> D Dimensions need to be set.

In this embodiment, the shape of the insulating member 5 is cylindrical, and the shape of the insulating member 5 is a brim-shaped circle with a cut-off portion 5a. However, any other appropriate shape may be used. In particular, the shape of the cut-off portion 5a is not limited to this, and has such an effect as to separate the abrasion powder (insulation effect) and not to come into contact with the outer peripheral surface of the slip ring 1, so that the surrounding structure is not affected. Any other shape may be used as long as there is no shape. For example, in order to increase the effect of separating the abrasion powder, the blocking portion 5a may be formed along the outer peripheral surface of the slip ring 1 to have a large blocking area.

[0013]

[Effect of the invention]

 As described above, according to the present invention, the insulating member is arranged between the adjacent brush holders in a state where the brush bolt is fitted therein, and the center of the insulating member in the axial direction has a flange shape. In addition, since the cut-off portion is extended so that it does not contact the outer peripheral surface of the slip ring, the brush dust is blocked so as not to scatter in the direction of the adjacent brush holder, and the wear dust is accumulated. The insulation can be prevented from being deteriorated between adjacent brush holders and between the grounds, and the interval between maintenance periods can be extended.

In addition, since the cylindrical member is formed on the inner peripheral surface of the insulating member on which the brush bolt is fitted, leaving both ends in the axial direction. Even if the brush abrasion powder enters the inside of the insulating member, the abraded powder enters the insulating space and stays there, so the insulation of the adjacent brush holders The effect is that the sex is maintained.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a slip ring system showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view illustrating a main part including the insulating member of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slip ring 2 Brush 3 Brush holder 4 Brush bolt 5 Insulating member 5a Cutoff part 5b Insulated space

Claims (5)

[Utility model registration claims] 1. A plurality of slip rings which are arranged coaxially adjacent to each other and rotate at a high speed, brushes which come into contact with an outer peripheral surface of each slip ring with a predetermined urging force, and a brush holder which holds each brush individually. And at least one brush bolt supporting the plurality of brush holders and disposed in parallel with the axial direction of the slip ring, wherein an insulating member is provided between the adjacent brush holders. A slip ring system, wherein the brush bolt is arranged to be fitted inside. 2. The insulating member is provided with a brim-shaped blocking portion at a central portion in an axial direction thereof, and has a size expanded so as not to contact an outer peripheral surface of the slip ring. The slip ring system according to claim 1. 3. The insulating member has an inner peripheral surface on which the brush bolt is fitted, leaving both ends in the axial direction.
The slip ring system according to claim 1, wherein a cylindrical space having an inner diameter larger than an inner diameter of the inner peripheral surface is formed. 4. The insulation member has an insulation distance D, which is a distance at which complete insulation between the adjacent brush holders is possible,
Assuming that P is the actual distance between adjacent brush holders, L is the axial length of the insulating member, and T is the length of each axial end of the inner peripheral surface of the insulating member. The slip ring system according to claim 1, wherein the slip ring system is formed so as to satisfy a condition of P−2 · T)> D. 5. The brush member according to claim 5, wherein:
The slip ring system according to claim 1, 2 or 3, wherein the brush ring is also arranged at both ends of the row.