JP2012130168A - Winding type rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding type rotary electric machine of a fully-closed type, having a structure on which wind capable of sufficiently cooling a part where a collector ring and a brush slide strikes.SOLUTION: A winding type rotary electric machine comprises a sealed housing 13; a stator fixed in the housing 13; a rotor capable of rotating in the inside of the stator and equipped with a rotor winding; a plurality of conductive brushes 14 fixed to the housing 13 and aligned in an axial direction; a collector ring 12 fixed to the rotor, electrically connected to the rotor winding, and slides with the brushes 14; and a main fan 16 and an auxiliary fan 17 fixed to the rotor, and disposed so as to sandwich the brushes 14 in the axial direction in the housing 13.

Description

  The present invention relates to a wound rotary electric machine, and more particularly, to a fully closed wound rotary electric machine having a fan in a housing.

  In a wound-type rotating electrical machine, a collector ring that rotates with a rotor is arranged to supply current to or extract current from the rotor winding, and a brush that slides on the collector ring is a stator. It is fixedly attached to the side. Since current flows while mechanically sliding between the collector ring and the brush, heat is generated. In a fully-closed wound-type rotating electrical machine, a stator, a brush, and the like are sealed in a housing, and a fan that rotates with the rotor is attached to cool the interior of the housing (Patent Documents 1 and 2). reference).

JP 2009-303356 A JP-A-10-94221

  The air sealed in the housing flows by the fan, but it has been difficult to make a structure in which a portion where the collector ring and the brush slide can be sufficiently cooled.

  The present invention is to solve such a problem in the prior art, and is a fully-closed winding type rotating electrical machine having a structure in which the portion where the collector ring and the brush slide can be sufficiently cooled. With the goal.

  In order to achieve the above object, a wound rotary electric machine according to the present invention includes a hermetically sealed housing, a stator fixed in the housing, and a rotor winding that is rotatable inside the stator. A rotor, a plurality of conductive brushes fixed to the housing and arranged in an axial direction, and fixed to the rotor and electrically connected to the rotor winding and slid with the brush And a first fan and a second fan that are fixed to the rotor and are disposed in the housing so as to sandwich the brush in the axial direction.

  According to this invention, it is possible to have a structure in which a wind that can sufficiently cool a portion where the collector ring and the brush slide is applied to the fully closed winding type rotating electrical machine.

It is a principal part upper half cross section front view of one Embodiment of the winding type rotary electric machine which concerns on this invention. FIG. 2 is an axial cross-sectional view of the wound rotary electric machine of FIG.

  Below, with reference to drawings, one embodiment of a winding type rotating electrical machine concerning the present invention is described. FIG. 1 is a front view of an upper half cross section of a main part of an embodiment of a wound rotary electric machine according to the present invention. 2 is an axial cross-sectional view of the wound rotary electric machine of FIG.

  A collector ring 12 is attached near the opposite end of the rotary shaft 11 so as to rotate together with the rotary shaft 11. Three collector rings 12 are arranged at an interval in the axial direction, and each collector ring 12 extends in the circumferential direction of the rotating shaft 11.

  A rotor (not shown) having a rotor winding that rotates together with the rotating shaft 11 is attached to the load side of the rotating shaft 11 (right side in FIG. 1). The outer side in the radial direction of the rotor is surrounded by a non-rotating stator (not shown). The stator is fixed to the housing 13 in the housing 13.

  A brush 14 that slides on the collector ring 12 is fixed to the housing 13 via a brush holder 15 in the housing 13. Three brushes 14 are arranged in the axial direction so as to be spaced apart from each other to form a group of brush groups, and the two brush groups are arranged at intervals in the circumferential direction. These six brushes 14 are arranged together in the upper half for convenience of maintenance.

  The housing 13 covers the rotating shaft 11, the brush 14, and the brush holder 15 in an airtight manner.

  A main fan 16 and an auxiliary fan 17 that rotate with the rotating shaft 11 are attached to the rotating shaft 11. The auxiliary fan 17 is attached to the opposite end portion of the rotary shaft 11 and is arranged so that the main fan 16 and the auxiliary fan 17 sandwich the brush 14 in the axial direction. The directions of the main fan 16 and the auxiliary fan 17 are configured such that wind blows toward the brush 14 when the rotating shaft 11 rotates in the forward direction.

  According to this embodiment, the main fan 16 and the auxiliary fan 17 are rotated by the rotation of the rotating shaft 11, and the cooling air by the main fan 16 and the cooling air by the auxiliary fan 17 are blown so as to be sandwiched from both sides of the brush 14. Thereby, the brush 14 can be cooled reliably.

  The embodiment described above is merely an example, and the present invention is not limited to this.

11 Rotating shaft 12 Collector ring 13 Housing 14 Brush 15 Brush holder 16 Main fan 17 Auxiliary fan

Claims (2)

A sealed housing;
A stator fixed in the housing;
A rotor rotatable inside the stator and provided with a rotor winding;
A plurality of conductive brushes fixed to the housing and arranged side by side in the axial direction;
A collector ring fixed to the rotor and electrically connected to the rotor winding and sliding with the brush;
First and second fans fixed to the rotor and disposed in the housing so as to sandwich the brush in the axial direction;
A wound-type rotating electrical machine characterized by comprising:   2. The wound rotary electric machine according to claim 1, wherein the first and second fans are arranged in such a direction as to send air toward the brush.

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