JPH0326917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to a current collecting ring device for a rotating electric machine that includes a slip ring, a brush, a brush holder, and the like.

[Prior art and its problems]

In a rotating electrical machine, electricity is supplied to the rotating parts through an electrical connection between a brush on the stationary side and a slip ring on the rotating side. In this case, due to maintenance issues, the slip ring was made of a metal with less wear, and the brush on the fixed side was made of graphite or the like, which had a relatively high wear rate, because it was easy to replace.
The brush is mounted in a brush holder in order to hold the brush with a constant pressure that prevents sparks between the two and reduces wear. Furthermore, a plurality of brush holders are held by brush holder supports, which constitute a conductor and are supported by an insulator. A part of the structure of such a current collecting ring device is shown in FIGS. 12 and 13. 12 is a side view, and FIG. 13 is a plan view taken in the direction of arrow P, in which 1 is a slip ring, 2 is a brush holder installed near the outer periphery of this slip ring 1 via a brush holder support 3, and 4 is a The brush is held by a brush holder 2 and is electrically connected by a lead wire 5 to a brush holder support 3 which serves as a conductor. This brush holder support 3 is attached to the brush holder support of the adjacent phase via an insulating tube 6 with studs 7 and nuts 8, and is fixed to the stationary side 9 of the rotating electric machine. When the current collector ring device having such a structure is operated, the tip of the brush 4 that slides on the slip ring 1 is worn out and brush powder is scattered. If this brush powder adheres to an insulating part such as the insulating tube 6, it may cause a short circuit phenomenon and be damaged by sparks. To prevent this from happening, you should always clean it.

[Object of the invention] In view of the above-mentioned circumstances, the present invention has been developed to collect brush powder generated during operation without scattering it around,
The purpose is to prevent the insulating parts from becoming contaminated.

[Key points of the invention]

In order to achieve the above object, the present invention has been modified as follows: an overhanging portion having an overhanging fan groove on both sides of the outer diameter side of the slip ring; and a flange overhanging in the circumferential direction from a plurality of brush holders; a conductive duct that is coupled to the flange and covers around the slip ring and has a U-shaped cross section; a divided arc-shaped cover that is coupled to the inner diameter side of the duct; and a container that is connected to the duct and guides the air of the duct. , a filter attached to a container, and air is sucked in from the fan groove by the fan action of the slip ring as the rotating electric machine rotates, and the brush powder is guided to the duct along with the air. Powder can now be collected.

[Embodiments of the invention]

1 to 8a and 8b show an embodiment of the present invention, and FIG. 1 shows a front view, and FIGS. 2 and 1 are plan views taken in the direction of arrow Q in FIG. A-A of
Figures 4 to 8a, centering around Figure 3 showing the cross-sectional view;
This will be explained with reference to the parts diagram shown in FIG. 8b.
A slip ring support ring 11 is fitted into the rotating shaft 10, and the slip ring 1 is attached to the slip ring support ring 11, and is fixed thereto with a stud bolt 17 and a nut 18 via an insulating tube 16. This slip ring 1 has a projecting portion 1a on both sides on the outer diameter side, and a fan groove 1 is provided in the projecting portion 1a.
b is provided. Brush holders 2 provided at a plurality of locations close to the outer periphery of the slip ring 1 are provided with flanges 2a as shown in FIGS. 5 to 7. This flange 2a is provided to prevent leakage of brush powder flowing through a duct which will be described later. Such a brush holder 2 has a duct 1 with a U-shaped cross section that also serves as a conductor with the adjacent one.
2, and the inner tip of this duct 12 has a protrusion 1a of a slip ring and a fan groove 1.
A divided arc-shaped cover 12a is attached to cover b. Further, the duct 12 is fixed to the rotating electric machine and the stationary side 9 via the insulating tube 6 using a stud bolt 7 and a nut 8. Next, the brush 13 is held by the brush holder 2, and is always in contact with the outer peripheral surface of the slip ring 1 with a constant pressure under the spring force of the coil spring 2b. Brush 13 is lead wire 13
It is electrically connected to a duct 12 which also serves as a conductor. The above-mentioned components are housed in a cosmetic case 14 as shown in FIG.
is connected to a container 19 having a filter 15, and a pipe 20 is provided which is connected from the container 19 to the cosmetic case 14. That is, in the embodiment of the present invention, when the slip ring 1 rotates, the tip end surface of the brush 13, which is held by the blank holder 2 and pressed against the slip ring 1 by the spring pressure of the coil spring 2c, wears out due to sliding. The generated brush powder is removed from the fan groove 2b by the rotation of the slip ring 1.
is contained in the air generated by the fan action, flows through the conductor 12, is discharged from the exhaust port 12b, and enters the container 15. When the brush powder passes through the filter 15 in the container 19, the brush powder is collected, and the purified air passes through the piping 20 and returns to the cosmetic case 14.The air flows in the direction shown by the arrow, so that the brush powder is collected and the purified air returns to the cosmetic case 14 through the pipe 20.
The internal air is always clear, and there is no chance of brush powder accumulating on the insulating part of the current collector ring and causing a short circuit. FIG. 8b is an enlarged view of the T portion of FIG. 8a, showing the connection structure between the duct and the container.

9 to 11 show other embodiments of the present invention, and the same parts as in FIGS. 1 to 8a and 8b are given the same reference numerals. Figure 1~
The difference from FIG. 8a and FIG. 8b is that the container 19
The structure is changed to return air to the cosmetic case 14 from the outlet side of the container 19 through the piping 20, and a suction fan 21 is installed at the outlet side of the container 19.
This is because we have established the following. Since so-called forced external ventilation is used, the cover 2c of the brush holder and the fan groove 1b of the slip ring, which are necessary for self-ventilation as described above, are unnecessary. In FIG. 11, the wind flow is in the direction indicated by the arrow.

[Efficacy of invention]

According to this invention, the brush powder generated by the rotation of the slip ring is not scattered, but is sucked into the duct that communicates each brush holder, and is further stored in a container with a filter and collected there, so that the current collecting ring device Since the insulating parts of the brush are less likely to be contaminated by brush powder, the intervals between inspection and cleaning can be extended.

[Brief explanation of drawings]

FIG. 1 is a front view of a current collector ring device according to an embodiment of the present invention, FIG. 2 is a plan view of the current collector ring device shown in FIG. 4 is a partial perspective view of the slip ring shown in FIGS. 1 to 3, and FIG. 5 is a side view of the brush holder shown in FIGS. 1 to 3. , FIG. 6 is a front view of the brush holder shown in FIG. 5 as viewed from arrow R, FIG. 7 is a plan view of the brush holder shown in FIG. 5 as seen from arrow S, and FIG. 8a is based on FIGS. 8b is an enlarged view of the T portion of FIG. 8a, FIG. 9 is a front view of a current collecting ring device according to another embodiment of the present invention, and FIG. The figure is a plan view of the current collector ring device shown in FIG. 9 as viewed from the T arrow, FIG. 11 is a diagram showing the flow of wind in the current collector ring device shown in FIG. 9, and FIG. FIG. 13 is a plan view of the current collector ring device of the conventional structure shown in FIG. 12 as viewed from arrow P. 1: Slip ring, 1a: Overhang, 1b: Fan groove, 2: Brush retainer, 2b: Flange, 2
b: cover, 12: duct, 15: filter, 1
9: Container.

Claims (1)

[Claims] 1. An overhanging part having a plurality of fan grooves in the radial direction extending from both sides of the outer diameter side of the slip ring, and a plurality of brush holders that hold brushes that come into contact with the slip ring and are arranged in the circumferential direction of the slip ring. A flange protruding from the container in the circumferential direction and a conductive duct which is coupled to a flange of a brush retainer adjacent to the circumferential direction of the slip ring and which covers the periphery of the slip ring and has a U-shaped cross section, and which is coupled to the inner diameter side of the duct. It consists of a divided arc-shaped cover that covers the fan groove and overhang of the slip ring, a container connected to the duct to guide the air in the duct, and a filter attached to the container. The rotation is characterized in that air is sucked through the fan groove by the accompanying fan action of the slip ring, the brush powder is guided along with the air into the duct, and the brush powder is further collected in the container via the filter. Electrical current collector ring device.