JP2004364430A - Transportation protective device of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transportation protective device of a rotating electric machine that allows coupling work with the transportation protective device attached, and is reducible in the weight of the rotating electric machine and in the cost thereof. <P>SOLUTION: The transportation protective device of the rotating electric machine comprises a rotating shaft arranged with a rotor core and a cooling fan, is supported by a bearing at its outboard side axial end, and is of a cantilever type having no bearing at its drive side. Since the device is provided with a first regulation means that regulates movement in the radial direction by fixing a rib of a frame of the rotating machine to the external peripheral side of the cooling fan with bolts and nuts, and a second regulation means that connects the cooling fan and the frame of the rotating machine, and regulates movements in the circumferential direction and the axial direction, the coupling work can be performed with the transportation protective device attached, thus providing the transportation protective device of the rotating electric machine reducible in the weight of the rotating electric machine and in the cost thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、回転軸の反駆動側は軸受によって支持され、駆動側は軸受を持たない片持ち型の回転電機の輸送保護装置に関する。
【０００２】
【従来の技術】
従来の回転電機の輸送保護装置として特許文献１がある。この特許文献１によれば、輸送時に固定子の駆動側のフランジ端に取り付けられた押え板と、この押え板と片持ち軸の駆動側の軸端との間の圧接された弾性体とを備え、片持ち軸の軸端及び前記弾性体の一方が凸部を有し、他方がその凸部に係合する凹部を有し、片持ち軸の軸端及び弾性体の一方の凸部を他方の凹部に挿入するようにした片持ち軸を備えた回転電機の輸送時保護装置が開示されている。
【０００３】
また、他の従来の回転電機の輸送保護装置として特許文献２がある。この特許文献２には、回転軸の駆動部分には、輸送保護装置に当接して回転軸の軸方向への移動を規制する当接面が設けられており、輸送保護装置は、回転軸の径方向に分割可能な複数の保持部材を有し、これらの保持部材には、回転軸が挿入される保持溝がそれぞれ設けられており、複数の保持溝の組合せにより回転軸の径方向への移動が規制されるように構成されたものが開示されている。
【０００４】
【特許文献１】
実公平６−２３１８１号公報
【特許文献２】
特開２０００−３５０４１６号公報
【０００５】
【発明が解決しようとする課題】
上記の特許文献１に記載されたような従来の回転電機の輸送保護装置では、相手方の原動機（主にディーゼルエンジンやガスエンジン等）と組み合わせる際、輸送保護装置を一度取り外し、回転軸を固定子にあずけた後、原動機側と直結する必要がある。また、特許文献２に記載されたような従来の回転電機の輸送保護装置では、輸送時の振動に十分耐えるような厚板の固定板が必要であり、また回転軸と接する押え板は片当たりのないよう高い加工精度の必要がある。さらに円周方向の規制がないため、輸送時の振動により回転軸が回転する可能性があり、それにより回転軸に傷が付く可能性がある。
【０００６】
本発明は、上記情況に対処するためになされたもので、その課題は、輸送保護装置を付けたまま直結作業をすることができ、回転電機の軽量化とコストの軽減が可能な回転電機の輸送保護装置を提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、請求項１に記載の発明は、回転子鉄心と冷却用ファンが配設された回転軸を有し、反駆動側軸端は軸受によって支持され、駆動側は軸受を持たない片持ち型の回転電機の輸送保護装置において、前記冷却ファンの外周側と前記回転電機のフレームのリブをボルトナットで固定し、径方向の移動を規制する第１規制手段と、前記冷却ファンと前記回転電機のフレームを接続し円周方向及び軸方向の移動を規制する第２規制手段を設けたことを特徴とする。
【０００８】
請求項１に記載の発明によると、少ない機械加工と輸送金具で輸送中の振動による固定子と回転子の接触を防止することができ、また輸送保護装置を付けたまま相手方機械と直結することができるので、据え付け作業が大幅に短縮可能となる。また従来より部品点数を少なくすることができ、回転電機の駆動側のカバーは薄板のものでよいので、回転機の軽量化とコストの軽減が可能である。
【０００９】
請求項２に記載の発明は、請求項１に記載の回転電機の輸送保護装置において、前記冷却ファンと前記回転電機のフレームをボルトナットで接続し、径方向、軸方向、円周方向の移動を同時に規制することを特徴とする。
【００１０】
請求項２に記載の発明によると、請求項１の効果に加え、冷却ファンと発電機フレームのリブ間だけで径方向、軸方向、円周方向の固定が可能となるので、さらに部品点数を少なくすることができ、据え付け作業の時間が短縮可能となる。
【００１１】
請求項３に記載の発明は、請求項１または請求項２に記載の回転電機の輸送保護装置において、前記冷却ファンまたは前記回転電機のフレームのリブに規格ナットを溶接したことを特徴とする。
請求項３に記載の発明によると、規格ナットを取り付けることで機械加工を省略することができ、より安価な輸送保護装置を構成することが可能となる。
【００１２】
【発明の実施の形態】
以下、本発明の実施形態を図を参照して説明する。
図１は、本発明の第１実施形態の回転電機の要部側面図、図２は図１の輸送保護装置要部拡大図、図３は輸送保護金具の取付手順を示す図である。
【００１３】
図に示すように、本実施形態の回転電機の回転軸１には冷却ファン２が配設されている。冷却ファン２には径方向に回転軸１の中心に向かってネジ穴３の加工を施し、ボルト４とナット５は図３（ａ）のように回転電機フレーム８のリブ６の位置からずらした位置で冷却ファン２のネジ穴３にねじ込む。次に、回転軸１を図３（ａ）の矢印方向に回転させ、図３（ｂ）に示すようにボルト頭とリブ位置を一致させる。回転軸１の軸芯が固定子の軸芯と合うようにボルト４を調整し、緩まないようにナット５をファン側に固定することで径方向の移動を規制する。このとき、ナット５はダブルナットにしておくと回り止めとすることができる。ボルト４は回転子の重量により大きさ、個数を任意に選べばよい。さらに回転機フレーム８と冷却ファン２を輸送保護金具７で締結し、軸方向及び周方向の移動を規制する。
【００１４】
本実施形態は、上記したように冷却ファン２と回転機フレーム８及びリブ６間で径方向、軸方向、円周方向への移動を規制する構造であるので、輸送保護装置を取り付けたまま直結作業をすることができる。また従来より部品点数を少なくすることができ、駆動側のカバーは薄板のものでよいので、回転機の軽量化とコストの軽減が可能である。
【００１５】
図４は、本発明の第２実施形態の輸送保護装置の要部拡大図である。
図に示すように、本実施形態は冷却ファン２には径方向に回転軸１の中心に向かってネジ穴３の加工を施し、回転電機フレーム８のリブ６にも同様にネジ穴３の加工を施す。リョウネジスタッドボルト９はナット５を付けた状態で、図３（ａ）の位置で冷却ファン２のネジ穴３にねじ込む。その後、回転軸１を図３（ａ）の矢印方向に回転させ、図３（ｂ）の位置まで回転させて、リブ６に設けられたネジ穴３にリョウネジスタッドボルト９をねじ込み、回転軸１の軸芯が固定子の軸芯と合うようボルトを調整し、緩まないようにしてナット５をファン側及びリブ側に固定する。このときダブルナットにしておくことで、回り止めとすることができる。このように回り止めすることで回転軸１を軸方向、径方向、円周方向の移動を規制することができる。
【００１６】
本実施形態は、上記したように冷却ファンと回転機フレーム及びリブ間で径方向、軸方向、円周方向への移動を規制する構造であるので、輸送保護装置を付けたまま直結作業をすることができ、さらに部品点数を少なくすることができるので、据え付け作業時間が短縮可能となる。
【００１７】
図５は、本発明の第３実施形態の冷却ファン要部の斜視図である。
図に示すように、本実施形態はファン２の外周側に規格ナット１０を溶接で取り付けるように構成したものである。図示しないが、リブ側に取り付けることも可能である。
【００１８】
本実施形態は、上記したように規格ナット１０をファン２の外周側に溶接により取り付けることで機械加工を省略することができ、より安価な輸送保護装置を提供することができる。
【００１９】
【発明の効果】
以上説明したように、本発明によれば、冷却ファンと回転機フレーム及びリブ間で径方向、軸方向、円周方向への移動を規制する構造であるので、輸送保護装置を取り付けたまま直結作業をすることができる。また、部品点数も従来より少なくなり、かつ駆動側のカバーは薄板でよいので、回転電機の軽量化とコストの軽減が可能である。
【図面の簡単な説明】
【図１】本発明の第１実施形態の回転電機の要部の側面図。
【図２】図１の輸送保護装置の要部の拡大図。
【図３】図１の輸送保護金具の取付手順を示す図。
【図４】本発明の第２実施形態の輸送保護装置の要部拡大図。
【図５】本発明の第３実施形態の輸送保護装置の要部斜視図。
【符号の説明】
１…回転軸、２…冷却ファン、３…ネジ穴、４…ボルト、５…ナット、６…リブ、７…輸送保護金具、８…回転機フレーム、９…リョウネジスタッドボルト、１０…規格ナット。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transport protection device for a cantilever type rotating electric machine in which a non-drive side of a rotary shaft is supported by a bearing and a drive side has no bearing.
[0002]
[Prior art]
There is Patent Document 1 as a conventional transport protection device for a rotating electric machine. According to Patent Document 1, a pressing plate attached to a driving flange end of a stator during transportation and an elastic body pressed between the pressing plate and a driving shaft end of a cantilever shaft. One end of the cantilever shaft and the elastic body has a convex portion, the other has a concave portion to be engaged with the convex portion, and the shaft end of the cantilever shaft and one convex portion of the elastic body. A transport protection device for a rotating electric machine including a cantilever shaft inserted into the other recess is disclosed.
[0003]
Patent Document 2 discloses another conventional transport protection device for a rotating electric machine. In Patent Literature 2, the driving portion of the rotating shaft is provided with a contact surface that contacts the transport protection device and regulates the movement of the rotating shaft in the axial direction. It has a plurality of holding members that can be divided in the radial direction, and these holding members are provided with holding grooves into which the rotating shaft is inserted, respectively. An arrangement configured to restrict movement is disclosed.
[0004]
[Patent Document 1]
Japanese Patent Publication No. 6-23181 [Patent Document 2]
JP 2000-350416 A
[Problems to be solved by the invention]
In a conventional transport protection device for a rotating electric machine as described in Patent Document 1, when the transport protection device is combined with a partner motor (mainly, a diesel engine, a gas engine, or the like), the transport protection device is once removed, and the rotating shaft is fixed to the stator. After that, it is necessary to connect directly to the prime mover. Further, in the conventional transport protection device for a rotating electric machine as described in Patent Document 2, a thick fixed plate is required to sufficiently withstand vibration during transportation, and a pressing plate in contact with the rotating shaft has a one-sided contact. It is necessary to have high processing accuracy so that there is no Furthermore, since there is no restriction in the circumferential direction, there is a possibility that the rotating shaft is rotated by vibration during transportation, which may damage the rotating shaft.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to address the above situation, and an object of the present invention is to provide a rotating electric machine capable of performing a direct connection work with a transport protection device attached, which can reduce the weight and cost of the rotating electric machine. It is to provide a transport protection device.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 has a rotating shaft on which a rotor core and a cooling fan are arranged, a shaft end opposite to the driving side is supported by a bearing, and a driving side is a bearing. In the cantilever type rotating electric machine transport protection device having no, the outer peripheral side of the cooling fan and the rib of the frame of the rotating electric machine are fixed with bolts and nuts, and the first restricting means for restricting radial movement, A cooling fan is connected to a frame of the rotating electric machine, and a second regulating means for regulating movement in a circumferential direction and an axial direction is provided.
[0008]
According to the first aspect of the present invention, it is possible to prevent contact between the stator and the rotor due to vibration during transportation with a small amount of machining and transportation fittings, and to directly connect to the counterpart machine with the transportation protection device attached. The installation work can be greatly shortened. Further, the number of parts can be reduced as compared with the conventional case, and the cover on the driving side of the rotating electric machine may be made of a thin plate, so that the weight and cost of the rotating machine can be reduced.
[0009]
According to a second aspect of the present invention, in the transport protection device for a rotary electric machine according to the first aspect, the cooling fan and the frame of the rotary electric machine are connected by bolts and nuts, and are moved in a radial direction, an axial direction, and a circumferential direction. Are regulated at the same time.
[0010]
According to the second aspect of the invention, in addition to the effect of the first aspect, since the fixing in the radial, axial, and circumferential directions can be performed only between the ribs of the cooling fan and the generator frame, the number of parts can be further reduced. The installation time can be reduced, and the installation time can be reduced.
[0011]
According to a third aspect of the present invention, in the transport protection device for a rotating electric machine according to the first or second aspect, a standard nut is welded to a rib of a frame of the cooling fan or the rotating electric machine.
According to the third aspect of the present invention, by attaching the standard nut, machining can be omitted, and a more inexpensive transport protection device can be configured.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a main part of the rotary electric machine according to the first embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the transport protection device of FIG. 1, and FIG.
[0013]
As shown in the drawing, a cooling fan 2 is provided on a rotating shaft 1 of the rotating electric machine according to the present embodiment. The cooling fan 2 is formed with a screw hole 3 in the radial direction toward the center of the rotating shaft 1, and the bolt 4 and the nut 5 are shifted from the position of the rib 6 of the rotating electric machine frame 8 as shown in FIG. Screw into the screw hole 3 of the cooling fan 2 at the position. Next, the rotating shaft 1 is rotated in the direction of the arrow in FIG. 3A, and the bolt head and the rib position are matched as shown in FIG. 3B. The bolt 4 is adjusted so that the axis of the rotating shaft 1 matches the axis of the stator, and the nut 5 is fixed to the fan so as not to be loosened, thereby restricting the movement in the radial direction. At this time, if the nut 5 is a double nut, it can be prevented from rotating. The size and number of the bolts 4 may be arbitrarily selected according to the weight of the rotor. Further, the rotating machine frame 8 and the cooling fan 2 are fastened with the transport protection fitting 7 to restrict the movement in the axial direction and the circumferential direction.
[0014]
The present embodiment has a structure in which the movement in the radial, axial, and circumferential directions is restricted between the cooling fan 2 and the rotating machine frame 8 and the ribs 6 as described above. Can work. Further, the number of parts can be reduced as compared with the conventional case, and the cover on the driving side may be made of a thin plate, so that the weight and cost of the rotating machine can be reduced.
[0015]
FIG. 4 is an enlarged view of a main part of the transport protection device according to the second embodiment of the present invention.
As shown in the drawing, in the present embodiment, the screw holes 3 are formed in the cooling fan 2 in the radial direction toward the center of the rotating shaft 1, and the screw holes 3 are similarly formed in the ribs 6 of the rotating electric machine frame 8. Is applied. The threaded stud bolt 9 is screwed into the screw hole 3 of the cooling fan 2 at the position shown in FIG. Thereafter, the rotating shaft 1 is rotated in the direction of the arrow in FIG. 3A, and is rotated to the position shown in FIG. 3B, and the threaded stud bolt 9 is screwed into the screw hole 3 provided in the rib 6, and the rotating shaft 1 is rotated. The bolt is adjusted so that the shaft center of one is aligned with the shaft center of the stator, and the nut 5 is fixed to the fan side and the rib side without loosening. At this time, by using a double nut, it is possible to prevent rotation. By stopping the rotation in this manner, the movement of the rotating shaft 1 in the axial, radial, and circumferential directions can be restricted.
[0016]
The present embodiment has a structure in which the movement in the radial direction, the axial direction, and the circumferential direction is restricted between the cooling fan, the rotating machine frame, and the rib as described above, so that the direct connection work is performed with the transport protection device attached. Since the number of parts can be reduced, the installation work time can be shortened.
[0017]
FIG. 5 is a perspective view of a main part of the cooling fan according to the third embodiment of the present invention.
As shown in the drawing, the present embodiment is configured such that a standard nut 10 is attached to the outer peripheral side of the fan 2 by welding. Although not shown, it can be attached to the rib side.
[0018]
In the present embodiment, the machining can be omitted by attaching the standard nut 10 to the outer peripheral side of the fan 2 by welding as described above, and a more inexpensive transport protection device can be provided.
[0019]
【The invention's effect】
As described above, according to the present invention, since the structure restricts the movement in the radial, axial, and circumferential directions between the cooling fan, the rotating machine frame, and the ribs, it is directly connected with the transport protection device attached. Can work. Also, the number of parts is smaller than in the conventional case, and the cover on the drive side may be a thin plate, so that the weight and cost of the rotating electric machine can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of a rotating electric machine according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of the transport protection device of FIG.
FIG. 3 is a diagram showing a procedure for attaching the transport protection fitting of FIG. 1;
FIG. 4 is an enlarged view of a main part of a transport protection device according to a second embodiment of the present invention.
FIG. 5 is a perspective view of a main part of a transport protection device according to a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rotating shaft, 2 ... Cooling fan, 3 ... Screw hole, 4 ... Bolt, 5 ... Nut, 6 ... Rib, 7 ... Transport protection bracket, 8 ... Rotating machine frame, 9 ... Ryo screw stud bolt, 10 ... Standard nut .

Claims (3)

回転子鉄心と冷却用ファンが配設された回転軸を有し、反駆動側軸端は軸受によって支持され、駆動側は軸受を持たない片持ち型の回転電機の輸送保護装置において、前記冷却ファンの外周側と前記回転電機のフレームのリブをボルトナットで固定して径方向の移動を規制する第１規制手段と、前記冷却ファンと前記回転電機のフレームを接続し円周方向及び軸方向の移動を規制する第２規制手段を設けたことを特徴とする回転電機の輸送保護装置。In the transport protection device for a cantilever type rotating electric machine having a rotor core and a rotating shaft on which a cooling fan is disposed, a shaft end opposite to the driving side is supported by a bearing, and a driving side has no bearing, First restricting means for fixing a rib of a frame of the rotating electric machine to an outer peripheral side of the fan with bolts and nuts to restrict radial movement; and connecting the cooling fan and the frame of the rotating electric machine in a circumferential direction and an axial direction. A transport protection device for a rotating electric machine, comprising a second restricting means for restricting the movement of the rotating electric machine. 請求項１に記載の回転電機の輸送保護装置において、前記冷却ファンと前記回転電機のフレームをボルトナットで接続し、径方向、軸方向、円周方向の移動を同時に規制することを特徴とする回転電機の輸送保護装置。The transport protection device for a rotating electric machine according to claim 1, wherein the cooling fan and the frame of the rotating electric machine are connected by bolts and nuts, and movements in a radial direction, an axial direction, and a circumferential direction are simultaneously regulated. Transport protection device for rotating electric machines. 請求項１または請求項２に記載の回転電機の輸送保護装置において、前記冷却ファンまたは前記回転電機のフレームのリブに規格ナットを溶接したことを特徴とする回転電機の輸送保護装置。The transport protection device for a rotary electric machine according to claim 1 or 2, wherein a standard nut is welded to a rib of the cooling fan or a frame of the rotary electric machine.

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