JP4628753B2 - Rotating electric machine - Google Patents

Description

The present invention, vibration and noise generated in the stator core of the rotary electric machine is about the rotary electric machine having a suppressing stator support structure being transmitted to the outside.

As a structure for suppressing vibration and noise generated in a stator core of a rotating electric machine such as an induction motor or a generator from being transmitted to the outside, the structure of Patent Document 1 is known. That is, in this structure, the fixing plate of the stator frame bottom plate and the leg plate of the end pressing plate of the stator core are fixed with bolts. A gap is formed between the lower end of the end pressing plate on both sides of the stator core and the connection plate of the stator frame bottom plate, and between the side surface of the end pressing plate and the stator frame side plate.
Japanese Patent No. 3053947

  The structure of Patent Document 1 has the following problems. That is, because the fixing plate of the stator frame bottom plate and the leg plate of the end pressing plate of the stator core are fixed with bolts, the thickness of the fixing plate must be increased, and it is difficult to reduce the weight of the stator frame. Met. Moreover, since the fixing position with the bolts is biased, it is not sufficient to fasten only with the bolts, and welding is also required. Furthermore, when adjusting the height for centering the stator in the rotating electrical machine assembly, it is necessary to cut the leg plate and the fixed plate, which takes much time.

This invention is made | formed in view of this situation, Comprising: It aims at providing the rotary electric machine which has a stator support structure which can be reduced in weight and is easy to manufacture.

In order to achieve the above object, a rotating electrical machine according to the present invention is fixed to a rotor that rotates around a horizontal rotating shaft, a stator core that surrounds the rotor, and both axial ends of the stator core. The two end presser plates that are erected and extend in a direction substantially perpendicular to the axial direction, the stator frame bottom plate that supports the lower end of the end presser plate, and the stator frame bottom plate connected to the stator frame bottom plate A stator frame including a stator frame side plate that covers a side surface of the core, and a leg plate extending in a horizontal direction is fixed to a lower end of the end pressing plate by welding, and the stator The frame bottom plate includes two fixed plates extending below the rotation axis and extending in parallel to the rotation axis direction in the same horizontal plane, and connecting between these fixed plates and extending in the horizontal direction and being thinner than the fixed plate The leg plate mounting seat is welded on the fixed plate. Fixed I, the leg plate is the leg plate placed on the mounting seat, the are fastened together by leg plates mounting seat and the leg plate is threaded fasteners, the fixing plate, leg plate mounting seat and the leg plate, the end portion pressing The screw fastener extends from the lower side of the plate to both sides in the rotational axis direction, and the screw fastener is disposed on both sides of the lower position of the end pressing plate in the rotational axis direction. It includes a bolt screwed into a screw hole formed in the leg plate mounting seat, and a nut screwed into the bolt from above the leg plate .

ADVANTAGE OF THE INVENTION According to this invention, the rotary electric machine which has a stator support structure which can be reduced in weight and is easy to manufacture can be provided.

  Embodiments of a stator support structure for a rotating electrical machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of a stator support structure for a rotating electrical machine according to the present invention, and FIG. 2 is a partial side sectional view taken along line AA in FIG.

  A stator frame 2 that supports the stator core 1 includes a stator bottom plate 3 that constitutes a bottom surface and stator frame side plates 4 that constitute both side surfaces. A rotor (not shown) that rotates about a horizontal axis is disposed in the stator core 1. Stator frame end plates 20 are disposed at both axial ends of the stator frame 2. A bearing support plate 21 is attached to the stator frame end plate 20, and the bearing support plate 21 supports the rotor via a bearing 22.

  The stator iron core 1 is pressed at its both end surfaces by end pressing plates 7 respectively. The end pressing plate 7 is an upright substantially rectangular plate, and leg plates 9 are attached to both sides of the lower portion thereof by welding. The leg plate 9 extends from the lower position of the end pressing plate 7 to both sides in the axial direction.

  The stator bottom plate 3 includes a fixed plate 5 that is two strip-shaped plates and a thin plate-like connection plate 6 that is welded to the fixed plates 5. The fixed plate 5 extends below and parallel to the shaft below the rotating electrical machine to support the load of the rotating electrical machine, and the connecting plate 6 extends horizontally so as to connect between the two fixed plates 5. . There is a leg plate mounting seat 8 at a portion that contacts the leg plate 9 on the fixed plate 5 and is welded to the fixed plate 5. The leg plate mounting seat 8 faces the leg plate 9 and extends substantially along the leg plate 9. Further, an adjustment liner 10 is disposed between the leg plate mounting seat 8 and the leg plate 9.

  The leg plate mounting seat 8 is provided with a screw hole (not shown), and the adjustment liner 10 and the leg plate 9 are fastened on the leg plate mounting seat 8 by bolts 11 and nuts 12 screwed into the screw holes. Here, as shown in FIG. 2, each leg plate 9 has bolts 11 and nuts 12 positioned on both sides in the axial direction at the lower position of the end pressing plate 7 and is fastened firmly.

  As shown in FIG. 1, a gap 13 is provided between the both sides of the end pressing plate 7 and the inner surface of the stator frame side plate 4 so as not to be directly connected. Further, a gap 14 is formed between the bottom surface of the end pressing plate 7 and the connection plate 6 so as not to be directly connected.

  Further, in order to give sufficient strength against vibration, a stator frame reinforcing side plate 15 having a bag structure is fixed to the upper portion of the stator frame side plate 4 by welding, and the rigidity of the stator frame side plate 4 is increased. Yes.

  An air passage (not shown) for circulating cooling air is attached to the upper portion of the stator frame 2.

  According to the embodiment described above, the electromagnetic noise generated from the stator core 1 can be suppressed from being transmitted to the outside due to the presence of the gaps 13 and 14 as in the conventional technique disclosed in Patent Document 1.

  Furthermore, according to the present embodiment, the leg plate mounting seat 8 is welded to the fixing plate 5 of the stator bottom plate 3, and the leg plate mounting seat 8 and the leg plate 9 are bolted, so that the fixing plate and the leg plate are bolted directly. The fixing plate 5 can be made thinner than the technique disclosed in Patent Document 1. Therefore, the weight of the entire stator frame 2 can be reduced.

  Furthermore, according to the present embodiment, the leg plate 9 and the leg plate mounting seat 8 are fastened by the bolt 11 and the nut 12 at two positions sandwiching the lower position of the end pressing plate 7 in the axial direction, so that reinforcement by welding is unnecessary. In addition, as compared with the prior art disclosed in Patent Document 1, it is possible to save labor in assembling work.

  Furthermore, according to the present embodiment, the adjustment liner 10 is sandwiched between the leg plate 9 and the leg plate mounting seat 8 with the bolt 11 and the nut 12, so that the leg plate 9 can be adjusted to adjust the height of the stator core 1. Further, it is not necessary to scrape the leg plate mounting seat 8, and the fastening position can be easily adjusted.

1 is an elevational sectional view showing an embodiment of a stator support structure for a rotating electrical machine according to the present invention. The AA arrow partial partial sectional view of FIG.

Explanation of symbols

1: Stator core 2: Stator frame 3: Stator bottom plate 4: Stator frame side plate 5: Fixed plate 6: Connection plate 7: End pressing plate 8: Leg plate mounting seat 9: Leg plate 10: Adjustment liner 11: Bolt 12: nut 13: gap 14: gap 15: stator frame reinforcing side plate 20: stator frame end plate 21: bearing support plate 22: bearing

Claims (3)

A rotor that rotates about a horizontal axis of rotation;
A stator core surrounding this rotor,
Two end presser plates that are fixedly provided at both axial ends of the stator core and extend in a direction substantially perpendicular to the axial direction;
A stator frame including a stator frame bottom plate that supports a lower end of the end pressing plate, and a stator frame side plate that is connected to the stator frame bottom plate and covers a side surface of the stator core;
A rotating electric machine having
A leg plate extending in the horizontal direction is fixed to the lower end of the end pressing plate by welding,
The stator frame bottom plate has two fixed plates extending below the rotation axis and extending in parallel to the rotation axis direction in the same horizontal plane, and is connected between these fixed plates and spreads in the horizontal direction, more than the fixed plate. A thin connecting plate,
A leg plate mounting seat is fixed on the fixing plate by welding,
The leg plate is disposed on the leg plate mounting seat, and the leg plate mounting seat and the leg plate are fastened to each other by a screw fastener ,
The fixing plate, the leg plate mounting seat and the leg plate extend from below the end pressing plate to both sides in the rotation axis direction, and the screw fastener sandwiches the lower position of the end pressing plate in the rotation axis direction. Is placed on both sides
The screw fastener includes a bolt screwed into a screw hole formed in the leg plate mounting seat, and a nut screwed into the bolt from above the leg plate.
Rotating electric machine. The rotating electrical machine according to claim 1, wherein an adjustment liner is interposed between the leg plate and the leg plate mounting seat . The space | gap is formed between the lower end of the said end part presser plate and the said connection board, and between the side surface of the said end part presser plate, and the said stator frame side plate, The Claim 1 or 2 characterized by the above-mentioned. The rotating electrical machine described in 1.

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