JPS61214743A - Collector ring chamber cooling ventilating mechanism of rotary electric machine - Google Patents

Abstract

PURPOSE:To alleviate the mixture of a foreign material to a brush sliding surface by providing a cover and a guide plate in a collector ring chamber to form a cooling air passage, thereby uniformly cooling the entire collector ring. CONSTITUTION:A fan 3 is mounted on the end of a rotational shaft in which a collector ring 6 is mounted, and a cover 4 is provided to cover the collector ring 6 side of the fan 3 from above in a collector ring chamber in which the entirety is coated with a collector cover 1. Further, a guide plate 9 for directing cooling air upward is provided oppositely to the lower side opening of the cover 4. Thus, since the collector ring of positive side is uniformly cooled, the wearing amount of positive side brush 7 can be alleviated, and it can prevent fine dusts from being adhered to a brush sliding surface.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a brush cooling ventilation path in a collector ring chamber of a rotating electrical machine, and in particular: (1) facilitates the introduction of cooling air to the pole side collector ring, and reduces the temperature rise of the brush; This invention relates to improvements in introducing brush cooling air suitable for suppressing the amount of wear on brushes and reducing the amount of wear on brushes.

[Background of the invention]

In the conventional structure, as shown in Figure 2, the brush cooling air is
, 6. Due to the shielding plate between the poles, only the e-pole side is cooled and bypassed directly to the exhaust duct embedded in the pedestal, and cooling to the secondary pole side is insufficient. In addition, the minute dust mixed in the brush cooling air is directly collected,
It easily adheres to the sliding surfaces between the brushes, causing increased brush wear.

[Purpose of the invention]

The object of the present invention is to discharge the brush cooling air introduced into the collector ring chamber of a rotating electric machine to the lower part of the collector ring chamber by using a cover attached to the periphery of the cooling air suction fan outlet, and to release the cooling air to the exhaust duct by using a ventilation guide plate. A structure was adopted in which the c-) pole side was directly cooled without being bypassed. This creates a smooth ventilation path and the collector ring (→,
- The cooling ventilation path in the collector ring chamber of the rotating machine is extremely effective in reducing the temperature rise of the brush by uniformly discharging the pole side, etc., and at the same time reducing the contamination of foreign matter on the brush sliding surface. It is about providing.

[Summary of the invention]

The main point of the present invention is to improve the cooling effect by improving the ventilation path within the collector ring chamber.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. A locker device is installed in the collector ring chamber that is sealed by the collector cover 1.

Since it is exposed to high temperatures, the fan 3 performs forced ventilation cooling. The cooled air from which dust has been removed through the filter 2 is introduced into the collector ring chamber by the fan 3, and is discharged downward into the collector ring chamber by the cover 4 as shown by the arrow, and is guided by the guide plate 9 to the G pole. It is introduced into the side collector ring 6 and discharged above the collector cover 1.

These cooling airs fill the collector ring chamber from above.

It has traditionally been considered an obstacle to ventilation. Without being affected by the shielding plate 5, the collector ring 6 and the brush 7 on the king pole side are simultaneously cooled and discharged to the outside from the exhaust duct 8. In this way, the cooling ventilation mechanism inside the collector ring chamber is operated by the collector cover 1. Cooling of the collector ring part is facilitated without complicating the structure of the collector ring, and at the same time, cooling air is not applied directly to the sliding surface of the collector ring, reducing the rate of adhesion of minute dust to the sliding surface of the collector ring. 6 [Effects of the Invention] According to the present invention, it is possible to reduce the increase in the amount of brush wear and the adhesion of minute dust due to the temperature rise of the + polar side collector ring brush.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the present invention, and FIG. 2 is an axial sectional view of the conventional device. 1-...Collector cover, 3...Fan, 4...Cover. 6...Collector ring, 7...Brush, 9...Guide plate.

Claims (1)

[Scope of Claims] 1. In a rocker device of a rotating electrical machine comprising a collector cover, a brush, a collector ring, and a cooling air suction fan, the cover has an opening at the lower side around the outlet side of the cooling air suction fan, and this cover. A collector ring chamber cooling ventilation mechanism for a rotating electrical machine, characterized in that a guide plate for guiding ventilation is provided below an opening of the rotating electrical machine.