JPS59172954A - Current collector of rotary electric machine - Google Patents

Abstract

PURPOSE:To readily remove wear powder around a slip ring by forming an outlet at the upside of a brush and a partition plate and an exhaust groove having a dust collecting machine at the downside, and forming a slope at the downside of a brush chamber. CONSTITUTION:An outlet 13 is formed at the upside of a brush chamber 5a, a partition plate 14 and an exhaust groove 16 having a dust collecting machine 15 are provided at the downside, and a slope is so formed that the downside of the chamber 5a becomes narrower toward the groove 16. Cooling air fed around a slip ring 2 through an incoming air cover 9 and a cooling fan 10 is flowed from the outlet 13 to the exterior. Wear powder dropped to the bottom of the chamber 5a is collected to the inlet of the groove 16 along the wall of the downside. The powder accumulated in the inlet is sucked to the machine 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a current collector for a rotating electric machine, and more particularly to a current collector for a rotating electric machine in which cooling air flows around a slip ring.

[Prior Art] FIG. 1 shows a conventional example of a current collector for a rotating electric machine. As shown in the figure, the current collector is fitted and fixed to the rotating shaft 1 via an electrical insulator, and includes a slip ring 2 that rotates together with the rotating shaft 1, and a slip ring 2 that slides on the outer peripheral surface of the slip ring 2. It is composed of a brush 3 that contacts, a brush holder 4 that holds the brush 3, and a brush chamber 5 that covers the slip ring 2, the brush 3, and the brush holder 4. And the brush chamber 5 has a slip ring.
The brush holder 4 is attached to the locker 7 by a rod 8.

In the current collector configured as described above, cooling air is distributed around the slip ring 2 via the popular cover 9 and the cooling fan 10, as shown by solid arrows in the figure.
The heat generated by the contact between the brush 3 and the slip ring 2 and the abrasion powder of the brush 3 are removed from the exhaust port 11 provided on the lower side of the brush chamber 5 through the wire mesh 1 for the exhaust port.
It was designed to be discharged through 2.

By the way, in such cooling using cooling air, wear powder is discharged to the outside together with the cooling air from the exhaust port 11, which not only pollutes the surrounding area, but also the wear powder around the slip ring 2 is not sufficiently removed. For this reason, in the past, the area around the slip ring 2 had to be periodically inspected and the abrasion powder had to be removed with a brush, brush, cloth, etc., and the inspection required a lot of time. Furthermore, if this inspection period is missed, a large amount of abrasion powder accumulates around the slip ring 2, making it impossible to ensure creeping insulation distance between each phase of the slip ring 2, resulting in a short circuit accident.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to provide a current collector for a rotating electrical machine that facilitates the removal of abrasion powder around a slip ring.

[Summary of the invention]

That is, the present invention provides an exhaust port on the upper side of the brush chamber, an exhaust groove with a partition plate and a sludge collector on the lower side, and
The brush chamber is characterized in that the lower side of the brush chamber is formed with a slope so that the width becomes narrower toward the discharge groove.

[Embodiment 5 of the Invention] The present invention will be described below based on the illustrated embodiment. FIG. 2 shows an embodiment of the invention. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, the lower side of the brush chamber 5a is formed with a slope so that the width becomes narrower toward the discharge groove 16. By doing this, slip ring 2
It is easier to remove wear particles around the slip ring 2.
It is possible to obtain a current collector for a rotating electrical machine that facilitates the removal of wear particles surrounding the rotating electric machine.

That is, the cooling air that has circulated around the slip ring 2 via the popular cover 9 and the cooling fan 10 is directed to the exhaust gas that has the exhaust cover 17 above the brush chamber 5a, as shown by the solid arrow in the figure. Since the port 13 is provided, the air flows to the outside through the exhaust port 13. Slip ring 2
Although the surrounding abrasion powder is lifted up by the cooling air, it is not discharged to the outside, but falls to the lower part of the brush chamber 5a due to its own weight. The abrasion powder that has fallen to the lower part of the brush chamber 5a is formed on the lower side of the brush chamber 5a with a slope so that the width becomes narrower as it goes toward the discharge groove 16 provided at the lower side. It gathers at the entrance of the discharge groove 16 along the lower wall. The abrasion powder accumulated at the entrance of the gate is removed by installing the partition plate 14 and the deer collector 15 in the discharge groove 16, so the partition plate 14 is opened and the deer collector 15 is operated, and the shoulder is removed by the deer collector 15. It becomes absorbed. In this way, the abrasion powder around the slip ring 2 can be easily collected and stored, and the abrasion powder can be easily absorbed by the deer collector 15. Abrasion powder around the slip ring 2 can be removed without requiring much time. Therefore, there is no accumulation of abrasion powder around the slip ring (5) 2, a creeping insulation distance between each phase of the slip ring 2 can be ensured, and short circuit accidents can be prevented. Furthermore, since the abrasion powder is prevented from being discharged to the outside, the abrasion powder is not discharged to the outside and contamination of the exterior can be prevented.

〔Effect of the invention〕

As described above, the present invention makes it easy to collect wear powder around the slip ring, making it easy to remove the wear powder. electrical equipment can be obtained.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional side view of a current collector for a conventional rotating electrical machine;
The figure is a longitudinal sectional side view of an embodiment of a current collector for a rotating electrical machine according to the present invention. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Slip ring, 3... Brush, 4... Brush holder, 5a... Brush chamber, 9
...Popular Agent Patent Attorney Nagasaki Hiroo Haya l Kyodai 2nd Kuchi/, 3/7 6 0 85 - / kya-6 7 295

Claims (1)

[Claims] 1. A slip ring that is fitted and fixed to a rotating shaft via an electrical insulator and rotates together with the rotating shaft, a brush that makes sliding contact with the outer peripheral surface of the slip ring, and a brush that is in sliding contact with the outer peripheral surface of the slip ring. A brush holder for holding a brush holder, and a brush chamber covering the slip ring, the brushes, and the brush holder, and cooling air is circulated around the slip ring through a cover and a cooling fan. In the current collector, an exhaust port is provided in the upper part of the brush chamber, and a discharge groove having a partition surface plate and a milk collector is provided in the lower part, and the width of the lower part of the brush chamber becomes narrower as it approaches the discharge groove. A current collector for a rotating electric machine, characterized in that it is formed with a slope so that