JP2009136063A - Rotor of salient-pole type rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the cooling performance of a rotor coil, and to reduce the rotor coil in size. <P>SOLUTION: A plurality of salient-pole type magnetic pole cores 3 are axially attached to the external periphery of a relay 2 arranged at a rotating shaft 1 at prescribed intervals, and the rotor coil 4 is wound to each of the salient-pole type magnetic pole cores 3. A coil bracket 5 is arranged between the rotor coils 4 of the adjacent salient-pole type magnetic pole cores 3, and the rotor coil 4 is pressed and fixed by a mounting bracket 6 and a nut 7 via the coil bracket 5. In the mounting bracket 6, an engagement part 6b protruding to the direction of a plate thickness is formed at one end of a flat plate 6a, and a screw rod 6c is attached to the end at the side of a non-engagement part. The mounting bracket 6 is limited in radial movement by making the engagement part 6b engaged with an engagement groove 2a of the relay 2, and the direction of the flat plate is arranged along the axial direction, thus enlarging an effective area of a ventilation passage 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotor of a salient pole type rotating electric machine.

  A rotor of a salient pole type rotating electrical machine has a plurality of salient pole type magnetic cores attached to the outer periphery of a yoke provided on a rotating shaft at predetermined intervals in the circumferential direction. Each is constituted by winding a rotor coil. Between the rotor coils of adjacent salient pole magnetic cores, a plurality of coil brackets are provided at predetermined intervals along the axial direction for pressing and fixing adjacent rotor coils. These are respectively fixed by being pressed down by bolts that pass through the coil bracket and are screwed into the yoke.

A space surrounded by the salient pole magnetic core, the rotor coil, the coil bracket and the yoke constitutes a ventilation path, and cooling air is supplied along the axial direction by this ventilation path to cool the rotor coil. It has become. (See Patent Documents 1 and 2)
JP-A-11-69681 JP 2007-189849 A

  By the way, in the above-mentioned conventional structure, the bolt that passes through the coil bracket and is attached to the yoke in the ventilation path reduces the ventilation path area and reduces the ventilation volume, which deteriorates the cooling performance of the rotor coil. One of the factors has led to an increase in the size of the rotor coil.

  The present invention has been made to solve the above-described problems of the prior art, and its object is to improve the cooling performance of the rotor coil and to reduce the size of the rotor coil. An object of the present invention is to provide a rotor for a salient pole type rotating electric machine.

  In order to achieve the above object, a rotor of a salient pole type rotating electrical machine according to the present invention includes a yoke provided on a rotating shaft, and a plurality of rotors attached to the outer periphery of the yoke at predetermined intervals in the circumferential direction. Are provided between each of the salient-pole magnetic cores, the rotor coils wound around the salient-pole magnetic cores, and the rotor coils of the adjacent salient-pole magnetic cores. A coil bracket for fixing, and a mounting bracket that presses and fixes the rotor coil through the coil bracket by being attached to the yoke through the coil bracket, and the mounting bracket is attached to one end of the flat plate. An engaging part that protrudes in the thickness direction is formed and a screw rod is attached to the end on the side opposite to the engaging part, and the engaging part of the mounting bracket is fitted into an engaging groove formed in the yoke. Limits radial movement and flat plate direction Arranged along the axial direction, characterized in that is provided so as screwed nuts threaded rod located outside the coil bracket fixing the coil bracket.

  According to the present invention, the mounting bracket located in the ventilation path is formed of a flat plate, and the flat plate direction is arranged along the axial direction, so the area occupied by the mounting bracket in the ventilation path is It becomes smaller and the effective ventilation path area becomes larger. As a result, the amount of ventilation in the ventilation path is increased, the cooling performance for the rotor coil is improved, and the size of the rotor coil can be reduced.

  Embodiments of a rotor of a salient pole type rotating electric machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the main part of the rotor of the salient pole type rotating electric machine according to the first embodiment of the present invention. 2A and 2B show the mounting bracket used in FIG. 1, FIG. 2A is a front view, and FIG. 2B is a left side view of FIG.

  1 and 2, a plurality of salient-pole magnetic cores 3 are attached to the outer periphery of the yoke 2 provided on the rotary shaft 1 at a predetermined interval in the circumferential direction. A rotor coil 4 is wound around each of the magnetic cores 3.

  Between the rotor coils 4 of the adjacent salient pole type magnetic cores 3, a plurality of coil brackets 5 for pressing and fixing the adjacent rotor coils 4 are provided along the axial direction. The mounting bracket 6 and the nut 7 are fixed so as to be pressed against the rotor coil 4.

  As shown in FIG. 2, the mounting bracket 6 is configured such that an engaging portion 6 b that protrudes in the thickness direction is formed at one end portion (the lower end portion in the drawing) of the flat plate 6 a and has a reverse T-shaped cross section. Further, two screw rods 6c, 6d are attached to the end portion (upper end portion in the drawing) on the side opposite to the engagement portion by welding or the like at a predetermined interval in the flat plate direction. 6c and 6d are configured to penetrate the coil bracket 5 individually.

  Although two screw rods are exemplified in the embodiment, one screw rod or three or more screw rods may be provided. Further, the number of mounting brackets is not limited to one, and a plurality of mounting brackets can be configured.

  An inverted T-shaped groove 2a extending in the axial direction is formed in the outer peripheral portion located between the salient pole type magnetic cores 3 of the yoke 2, and the mounting bracket 6 is engaged with the engaging groove 2a. 6a is fitted so that radial movement is limited, and the flat plate direction is arranged along the axial direction. Further, the mounting bracket 6 is screwed onto the screw rods 6 c and 6 d positioned outside the coil bracket 5, and the nut 7 is screwed, and the rotor coil 4 is pressed and fixed via the coil bracket 5 by tightening the nut 7. It is supposed to be.

  A space surrounded by the salient pole type magnetic core 3, the rotor coil 4, the coil bracket 5 and the yoke 2 constitutes the ventilation path 8, and the cooling air is supplied along the axial direction through the ventilation path 8. The rotor coil 4 is cooled.

  Here, the mounting bracket 6 located in the ventilation path 8 is composed of a flat plate 6a, and is disposed so that the plate thickness is thin and the flat plate direction is along the axial direction. Therefore, the area occupied by the mounting bracket 6 in the ventilation path 8 is reduced, and the effective area of the ventilation path 8 is increased as compared with the case where bolts are used. As a result, the amount of ventilation in the ventilation path 8 is increased, the cooling performance for the rotor coil 4 is improved, and the rotor coil 4 can be reduced in size.

  3 (a) and 3 (b) show a mounting bracket used in the rotor of the salient pole type rotating electric machine according to the second embodiment of the present invention, (a) is a front view, and (b) is (a). FIG.

  This embodiment is different from the first embodiment in that a blade portion 6e that bends in a direction intersecting the flat plate direction (axial direction) at an end portion along the axial direction of the flat plate 6a of the mounting bracket 6. Is formed by bending or welding of another part.

  According to the present embodiment, when the rotor rotates about the rotation shaft 1, the fan effect is generated by the blade portion 6 e, and the cooling air is forcibly sent into the ventilation path 8. The cooling performance for the coil 4 can be further improved.

  In the above embodiment, the case where the blade portion 6e is provided only on one side is illustrated, but if the end portion is bent so that the cross section of the end portion is Y-shaped, the rotor rotates. Regardless of the direction, the cooling air can be forced into the ventilation path 8.

It is sectional drawing which shows the principal part of the rotor of the salient pole type rotary electric machine by 1st Embodiment of this invention. (A) And (b) shows the mounting bracket used in FIG. 1, (a) is a front view, (b) is a left side view of (a). (A) And (b) shows the mounting bracket used with the rotor of the salient pole type rotary electric machine by 2nd Embodiment of this invention, (a) is a front view, (b) is (a). It is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... yoke 2a ... engaging groove 3 ... salient-pole magnetic core 4 ... rotor coil 5 ... coil bracket 6 ... mounting bracket 6a ... flat plate 6b ... engaging part 6c, 6d ... screw rod 6e ... blade Part 7 ... Nut 8 ... Ventilation path

Claims (2)

A yoke provided on the rotating shaft;
A plurality of salient pole-shaped magnetic cores attached to the outer periphery of the yoke at predetermined intervals in the circumferential direction;
A rotor coil wound around each of these salient pole magnetic cores;
A coil bracket provided between the rotor coils of the adjacent salient pole magnetic cores, and pressing and fixing the adjacent rotor coils;
A mounting bracket that presses and fixes the rotor coil through the coil bracket by being attached to the yoke through the coil bracket;
The mounting bracket is formed by forming an engaging portion protruding in the thickness direction at one end of the flat plate and attaching a screw rod to the end on the side opposite to the engaging portion, and the engaging portion of the mounting bracket Is fitted in an engaging groove formed in the yoke to restrict radial movement, and the flat plate direction is arranged along the axial direction, and a nut is attached to the screw rod located outside the coil bracket. A rotor of a salient pole type rotating electrical machine, wherein the coil bracket is fixed by screwing together.   The salient pole type rotating electric machine according to claim 1, wherein a blade portion that is bent with respect to a direction in which the flat plate extends is formed at an end portion along the axial direction of the flat plate of the mounting bracket. Rotor.

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