JPH0340735A - Current collector for electrical rotary machine - Google Patents

Abstract

PURPOSE:To prevent scattering of abrasion powder to the outside of cover perfectly by fixing a plurality of electrical dust collectors containing current collecting board directly to the vent of the cover then coupling the electrical dust collector containing the current collecting board and a variable flow blower with a vent pipe coupled with a dust collecting nozzler nozzle in the cover. CONSTITUTION:Electrical dust collectors 11 containing current collecting board are arranged on a plurality of vents 8a made through a cover 8. Since a plurality of electrical dust collectors 11 containing current collecting board are fixed directly to the vents 8a of the cover 8, air containing abrasion powder produced at the sliding portion of a brush 5 is passed into the electrical dust collector 11. Where only the abrasion powder is adhered to the current collecting board and clean air is discharged to the outside.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a current collector for a rotating electric machine, and more specifically, the present invention relates to a current collector for a rotating electric machine, and more specifically, the field is The present invention relates to a current collecting device for a rotating electrical machine that collects current.

[Conventional technology]

Figures 3 and 4 show a conventional current collector for a rotating electrical machine disclosed, for example, in Japanese Utility Model Application Publication No. 58-166277. 1a
) is provided. (4) is an insulating spacer with a current collecting ring (2
) on the rotating shaft (1) using the fixing bolt (3).
a) and electrically insulates the current collecting ring (2) from the rotating shaft (1). (5) is a brush, (6) is a ventilation pipe, and (7) is a dust collection nozzle. (8) is a cover surrounding the device, and a plurality of ventilation holes (8a) are provided in the circumferential direction.

In the above configuration, the rotating shaft (1) and the current collecting ring (2)
An arbitrary number of brushes (5
) are placed. Similarly, the required number of dust collection nozzles (7) and ventilation pipes (6) are installed, and the ventilation pipes (6) are connected to a separately installed dust collector (not shown).

Due to the rotation and electrical contact of the current collecting ring (2), the brush (5) is worn and a large amount of abrasion powder is scattered.

Since this abrasion powder adheres to the surface of the insulating gap piece (4) and obstructs the electrical insulation effect, the dust collector is operated as necessary to allow the dust collector to absorb the brush abrasion powder. Note that the dust collector is operated in synchronization with the operation of the main engine.

In addition, as a conventional device, as shown in FIG.
1>, some bearings are equipped with a bearing oil tank (9) and a bearing labyrinth seal (lO).

[Problem to be solved by the invention]

The conventional 4A electric device of a rotating electric machine as described above includes a current collection ring,
The dust collector collects brush abrasion powder along with the air inside the cover, but since the current collecting ring needs to be cooled, the inside and outside are ventilated through ventilation holes provided on the outer periphery of the cover. Therefore, in addition to drawing the collected dust from the dust collection nozzle into the dust collector, brush abrasion powder is unavoidably scattered outside from the ventilation opening of the cover, causing significant staining around the outside of the cover.

In addition, various devices such as a dust collection nozzle, a ventilation pipe, etc. to the dust collection R were required, and maintenance was also difficult.

Furthermore, as the surrounding air is drawn in by the aluminium collector, the upper surface of the labyrinth seal becomes extremely negative pressure, which causes the problem of drawing oil vapor in the oil tank.

This invention was made to solve the above-mentioned problems, and can completely prevent the scattering of abrasion powder to the outside of the cover, alleviate the negative pressure phenomenon in the labyrinth seal part, and improve the current collection of rotating electric machines. The purpose is to obtain equipment.

[Means to solve the problem]

In the first aspect of the present invention, a plurality of electrostatic precipitators each having a built-in current collecting plate are directly attached to the ventilation opening of the cover.

Further, in the second invention, an electric dust collector having a built-in current collecting plate and a variable air volume blower are connected to a ventilation pipe connected to a dust collecting nozzle inside the cover.

[For production]

In the first aspect of the present invention, ventilation air passes through the electrostatic precipitator, and at that time, abrasion powder is electrically attached to the current collector plate.

In the second aspect of the present invention, when causing abrasion powder to adhere to the current collecting plate of the electric collector, the amount of suction into the dust collector and the pressure inside the cover are adjusted by a variable air volume blower.

Embodiment FIG. 1 shows an embodiment of the first invention, in which an electrostatic precipitator (11) with a built-in current collector plate is installed in a plurality of ventilation holes (811) provided in the cover (8). (8) respectively.

Other than that, the same symbols as in Fig. 3 are the same parts.
The explanation will be omitted.

With the above configuration, a plurality of electric dust collectors <11> with built-in current collecting plates are installed directly to the ventilation opening (8a) of the cover (8), so dust particles generated on the sliding part of the brush (5>) and floating At the same time, the air containing the abrasion powder that passes through the ventilation port (8a) is passed through the electrostatic precipitator (11), so that only the abrasion powder adheres to the current collector plate, and the outside is cleaned. Exhaust air.

FIG. 2 shows an embodiment of the second invention, in which a plurality of dust collection nozzles (7) provided in the cover (8) and the cover (8)
The electric precipitator fi (32) with a built-in current collector plate provided outside is connected to it through a ventilation pipe (6). Electric dust collector (12
) is connected to a variable air volume blower (13) that sucks air containing wear particles from inside the cover park 8) and discharges it to the outside.

In addition, the same reference numerals as in FIG. 5' indicate the same parts, and a description thereof will be omitted.

With the above configuration, by adjusting the suction amount and pressure to the electrostatic precipitator a (12) inside the cover (8) using the variable air volume blower (13), the abrasion powder on the outside of the cover (8) is scattered. It is also possible to alleviate the negative pressure phenomenon in the labyrinth seal portion (10) and prevent the oil paper from being drawn into the cover (8>).

〔Effect of the invention〕

As described above, according to the first aspect of the present invention, since the electrostatic precipitator with a built-in current collector plate is directly attached to the ventilation opening of the cover, dust collection of abrasion powder is effective, and attached equipment The equipment is simple and inexpensive, and maintenance is easy.

In addition, according to the second invention, a blower with variable air volume is connected to a dust collector with a built-in current collector plate, and it is possible to adjust the number & dust of brush wear powder inside the cover and the pressure inside the cover. Effective dust collection and prevention of oil vapor generation from the labyrinth seal can be achieved at low cost, and maintenance is also easy.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a first embodiment of this invention, FIG. 2 is a second side sectional view of this invention, and FIGS. 3 and 4 are side views of a conventional current collector of a rotating electric machine. A sectional view and a plan sectional view, and FIG. 5 is a side sectional view of another conventional current collector for a rotating electric machine. (1)... Co-rotating shaft, (2)... Current collection ring, (5)...
Brush, <6)... Ventilation pipe, (7)... Dust collection nozzle, (
8> Cover, (8a) Ventilation opening, (10> Labyrinth seal, (11), (12) Electrostatic precipitator, <13) Blower. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A current collector ring that is fixedly supported on the rotating shaft, multiple brushes that collect field current by sliding on the current collector ring, and multiple ventilation units that house each of the above parts. A current collector for a rotating electric machine, comprising a cover provided with an opening, and an electric dust collector having a built-in current collecting plate and directly attached to each of the ventilation openings. (2) A current collector ring that is fixedly supported on the rotating shaft, a plurality of brushes that slide into contact with the current collector ring to collect field current, and a cover that houses each of the above parts. , a labyrinth seal portion of the bearing of the rotating shaft, dust collecting nozzles provided corresponding to the brushes, and an electric dust collector having a built-in current collecting plate and connected to each of the dust collecting nozzles through a ventilation pipe; A current collector for a rotating electrical machine, which includes a variable air volume blower connected to the electric dust collector.