WO2015104731A1 - Rotating electrical machine - Google Patents
Rotating electrical machine Download PDFInfo
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- WO2015104731A1 WO2015104731A1 PCT/JP2014/000013 JP2014000013W WO2015104731A1 WO 2015104731 A1 WO2015104731 A1 WO 2015104731A1 JP 2014000013 W JP2014000013 W JP 2014000013W WO 2015104731 A1 WO2015104731 A1 WO 2015104731A1
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- blade
- rotating electrical
- electrical machine
- fan
- wind
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/307—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the tip of a rotor blade
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
A rotating electrical machine that solves the issue of the difficulty of obtaining a cooling effect in conventional rotating electrical machine and comprises: an external fan (21) fixed to a rotation axis (13) and having a plurality of blades (33) that radially extend from the rotation center of the rotation axis (13); an external fan cover (24) covering the external fan (21) and having an opening at a position facing the external fan (21); and a discharge port that discharges air to the outside of the rotating electrical machine (25). The entire surface or part thereof of a tip surface (33a) of the blades (33) in the radial direction of the rotation axis (13) has a prescribed thickness in the radial direction and has a spreading shape in the circumferential direction.
Description
この発明は、回転電機に取り付けられる外扇ファンの羽根形状に関する。
The present invention relates to a blade shape of an external fan fan attached to a rotating electrical machine.
従来技術の回転電機には、回転子や固定子の損失による発熱があるため、送風によって冷却するための外扇ファンが取り付けられている。外扇ファンは、軸に直接取り付けられている場合が多く、回転電機の回転によって風が発生する。回転電機を効率よく冷却するためには、発生した風を軸方向に流す必要があり、この場合、軸流ファンが適している。軸流ファンは、ファンの羽根が斜めに取り付いており、風の向きを変えることができる反面、回転方向である正転あるいは逆転を常に一方向にする制約が発生する。
Since the conventional rotating electric machine generates heat due to loss of the rotor and the stator, an external fan for cooling by blowing is attached. In many cases, the external fan is directly attached to the shaft, and wind is generated by the rotation of the rotating electrical machine. In order to efficiently cool the rotating electrical machine, it is necessary to flow the generated wind in the axial direction. In this case, an axial fan is suitable. The axial fan has the blades of the fan attached at an angle, and the direction of the wind can be changed. On the other hand, there is a restriction that the forward rotation or the reverse rotation that is the rotation direction is always in one direction.
例えば、汎用の誘導電動機の場合、回転方向はどちらも必要であるため、両方向の回転に対して同一の冷却性能が求められる。従って、誘導電動機では、ファンの羽根が垂直に取り付けられたプレートファンを使うことが多い。しかし、プレートファンでは、円周方向に広がるような風が発生するだけで、冷却効果が得られにくい。そこで、従来の回転電機は、ファンの周囲に外扇カバーを設けて、風の向きが軸方向に変わるようにしている。
For example, in the case of a general-purpose induction motor, since both rotation directions are necessary, the same cooling performance is required for rotation in both directions. Therefore, an induction motor often uses a plate fan with fan blades mounted vertically. However, with a plate fan, only a wind that spreads in the circumferential direction is generated, and it is difficult to obtain a cooling effect. Therefore, the conventional rotating electric machine is provided with an outer fan cover around the fan so that the direction of the wind changes in the axial direction.
また、プレートファンにおいても、軸方向へ風が流れるようにするために、外扇ファンの羽部部材の両側面を凹形状としている（例えば、特許文献１参照）。
Moreover, also in a plate fan, in order to make a wind flow to an axial direction, the both sides | surfaces of the wing | blade part member of an external fan fan are made into concave shape (for example, refer patent document 1).
従来の回転電機は、以上のように構成されているので、垂直に取り付けられた羽根の両側面の中央部分が凹んでいるため、平板形状の羽根に比べて風量は増加する。しかし、風の流れは羽根の両側面の凹形状に沿った外径方向への流れとなるため、大半の風が外径方向に、かつ放射状に拡散するように流れてしまう。このように、従来の外扇ファンの羽根は積極的に軸方向への風の流れを発生させる形状になっておらず、一部の風が軸方向に流れるのみであり、期待する冷却効果が充分に得られないといった問題点がある。
Since the conventional rotating electrical machine is configured as described above, the air volume increases compared to the flat blades because the central portions of both side surfaces of the blades mounted vertically are recessed. However, since the flow of the wind is a flow in the outer diameter direction along the concave shape on both side surfaces of the blade, most of the wind flows so as to diffuse radially in the outer diameter direction. In this way, the blades of the conventional fan fan are not shaped to positively generate the wind flow in the axial direction, only a part of the wind flows in the axial direction, and the expected cooling effect is There is a problem that it cannot be obtained sufficiently.
この発明は、上述のような問題を解決するためになされたもので、その目的は、外扇ファンの羽根の形状を積極的に軸方向への風の流れを発生させる形状にすることで、冷却性能を向上させた回転電機を提供するものである。
This invention was made in order to solve the above-mentioned problems, and its purpose is to make the shape of the blades of the external fan fan positively generate a wind flow in the axial direction. A rotating electrical machine with improved cooling performance is provided.
この発明に係る回転電機においては、回転軸に固定され回転中心から放射状に延伸する複数の羽根を有する外扇ファンと、外扇ファンを覆い外扇ファンに対向する位置に開口部を有する外扇カバーと、回転電機外部に空気を吐出する吐出し口とを備え、羽根は、回転軸の径方向の先端面全面もしくは一部が径方向に所定の厚みを有し、周方向に広げた形状である。
In the rotating electrical machine according to the present invention, an outer fan fan having a plurality of blades fixed to a rotating shaft and extending radially from the center of rotation, and an outer fan having an opening at a position that covers the outer fan fan and faces the outer fan fan A cover and a discharge port for discharging air to the outside of the rotating electrical machine, and the blade has a shape in which the whole or part of the radial front end surface of the rotating shaft has a predetermined thickness in the radial direction and is widened in the circumferential direction. It is.
この発明は、羽根の軸中心から遠い面である先端面の全部もしくは一部を軸の周方向に広げるようにしたので、外扇ファンの回転により吸い込まれた風が、外扇ファンにより外径方向へ押し出された風へと変化した後、周方向に広げられた羽根の先端面に風が衝突することで風向きが軸方向に変換され、その結果、回転電機本体の軸方向へ風が流れやすくなり、冷却性能が向上するため、回転電機の高効率化が実現できる。
In the present invention, all or part of the tip surface, which is a surface far from the axial center of the blade, is expanded in the circumferential direction of the shaft, so that the wind sucked by the rotation of the outer fan fan is After changing to wind pushed out in the direction, the wind collides with the tip surface of the blade spread in the circumferential direction, so that the wind direction is converted into the axial direction, and as a result, the wind flows in the axial direction of the rotating electrical machine body Since it becomes easier and the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
実施例１．
以下に、この発明に係る回転電機の外扇ファンを説明する。なお、この実施例１では、全てのファンの羽根が軸方向に平行に取り付けられ、また、羽根の形状が軸方向に対して左右対称になっているものを対象としている。 Example 1.
Below, the external fan fan of the rotary electric machine which concerns on this invention is demonstrated. In the first embodiment, all fan blades are attached in parallel to the axial direction, and the blade shape is symmetrical with respect to the axial direction.
以下に、この発明に係る回転電機の外扇ファンを説明する。なお、この実施例１では、全てのファンの羽根が軸方向に平行に取り付けられ、また、羽根の形状が軸方向に対して左右対称になっているものを対象としている。 Example 1.
Below, the external fan fan of the rotary electric machine which concerns on this invention is demonstrated. In the first embodiment, all fan blades are attached in parallel to the axial direction, and the blade shape is symmetrical with respect to the axial direction.
図１は、この発明の実施例１を示す回転電機の断面図である。図１において、１１は回転電機本体、１２は回転電機本体１１の発熱を冷却するための外扇ファン、１３は回転軸、１４は外扇カバーである。外扇ファン１２は回転軸１３に固定され、回転軸１３の回転とともに外扇ファン１２も回転する。この外扇ファン１２の安全保護と風向きの整流を目的に外扇カバー１４が設置されている。
FIG. 1 is a sectional view of a rotating electrical machine showing Embodiment 1 of the present invention. In FIG. 1, 11 is a rotating electrical machine body, 12 is an external fan for cooling the heat generated by the rotating electrical machine body 11, 13 is a rotating shaft, and 14 is an external fan cover. The outer fan fan 12 is fixed to the rotating shaft 13, and the outer fan fan 12 rotates as the rotating shaft 13 rotates. An outer fan cover 14 is provided for the purpose of safety protection of the outer fan 12 and rectification of the wind direction.
次に、この実施例１の外扇ファン１２の羽根形状に関し、比較例を示しながら説明する。図２は、比較例となる外扇ファンの羽根形状の概念図、図３は、比較例となる外扇ファンによる風の流れの説明図である。図２と図３において、２１は外扇ファン、２２は外扇ファン２１の回転により吸い込まれた風、２３は外扇ファン２１により径方向へ押し出された風、２４は外扇カバー、２５は回転電機本体、２６は回転電機本体２５の軸方向へ吐き出される風である。３１は羽根、３１ａは羽根３１の軸中心から遠い面である先端面、３２は羽根３１をつなげている側板であり、この側板３２の周りに羽根３１が複数枚設置されて、外扇ファン２１を構成している。羽根３１は、厚みが一定になっている。
Next, the blade shape of the external fan 12 of Example 1 will be described with reference to a comparative example. FIG. 2 is a conceptual diagram of the blade shape of an external fan fan as a comparative example, and FIG. 3 is an explanatory diagram of the flow of wind by the external fan fan as a comparative example. 2 and 3, reference numeral 21 denotes an outer fan fan, 22 a wind sucked by the rotation of the outer fan fan 21, 23 a wind pushed radially by the outer fan fan 21, 24 an outer fan cover, and 25 The rotating electrical machine body 26 is wind that is discharged in the axial direction of the rotating electrical machine body 25. Reference numeral 31 denotes a blade, 31a denotes a front end surface which is a surface far from the axial center of the blade 31, and 32 denotes a side plate connecting the blades 31. A plurality of blades 31 are installed around the side plate 32, and the external fan 21 Is configured. The blade 31 has a constant thickness.
外扇ファン２１の回転により吸い込まれた風２２は、外扇ファン２１により径方向へ押し出された風２３へと変化することで、外扇カバー２４の内面に当たり風向きが変わり、回転電機本体２５の軸方向へ吐き出される風２６となる。比較例となる外扇ファンでは、外扇ファン２１により径方向へ押し出された風２３を、一回、外扇カバー２４に当てることで、回転電機本体２５側へと風を流しているので、回転電機を効果的に冷却できない。
The wind 22 sucked in by the rotation of the outer fan fan 21 changes to the wind 23 pushed in the radial direction by the outer fan fan 21, so that the wind direction changes against the inner surface of the outer fan cover 24, and The wind 26 is discharged in the axial direction. In the outer fan fan as a comparative example, the wind 23 pushed in the radial direction by the outer fan fan 21 is applied to the outer fan cover 24 once so that the wind flows toward the rotating electrical machine main body 25 side. The rotating electrical machine cannot be cooled effectively.
図４は、この発明の実施例１を示す回転電機のファンの羽根形状の概念図であり、図１のＡ方向から見ている。図４において、３２は羽根をつなげている側板、３３は羽根であり、側板３２の周りに複数枚設置される。３３ａは羽根３３の軸中心から遠い面である先端面である。羽根３３は、図２で説明した羽根３１の軸中心から遠い面である先端面３１ａを周方向に左右対称に広げた構造、すなわち、軸方向に垂直な断面形状が略Ｔ字形状であり、放射状の中心線に対して線対称となっている。広げる大きさ、すなわち軸に対する周方向への広げ量は、必要とする風量や羽根の強度等を考慮して決定される。また、広げる面の厚さ、すなわち軸に対する径方向の厚みも、羽根の強度等を考慮して決定される。なお、図４では、羽根３３の先端面３３ａの全面を周方向に広げているが、先端面３３ａの一部分のみを周方向に広げるようにしても良い。
FIG. 4 is a conceptual diagram of the blade shape of the fan of the rotating electrical machine showing the first embodiment of the present invention, as viewed from the direction A in FIG. In FIG. 4, 32 is a side plate connecting blades, 33 is a blade, and a plurality of plates are installed around the side plate 32. Reference numeral 33 a denotes a tip surface that is a surface far from the axial center of the blade 33. The blade 33 has a structure in which the tip surface 31a, which is a surface far from the axial center of the blade 31 described in FIG. 2, is symmetrically expanded in the circumferential direction, that is, the cross-sectional shape perpendicular to the axial direction is substantially T-shaped, It is axisymmetric with respect to the radial center line. The size of the spread, that is, the amount of spread in the circumferential direction with respect to the shaft is determined in consideration of the required air volume, blade strength, and the like. Further, the thickness of the surface to be spread, that is, the thickness in the radial direction with respect to the axis is also determined in consideration of the strength of the blades. In FIG. 4, the entire front end surface 33a of the blade 33 is expanded in the circumferential direction, but only a part of the front end surface 33a may be expanded in the circumferential direction.
この発明の実施例１に示す回転電機の外扇ファンを用いることで、外扇ファン１２の回転により吸い込まれた風が、外扇ファン１２により径方向へ押し出された風へと変化した後、周方向に広げられた羽根３３の先端面３３ａに当たることで風向きが変わり、回転電機本体１１の軸方向へ風が流れやすくなる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。
By using the outer fan fan of the rotating electric machine shown in the first embodiment of the present invention, the wind sucked by the rotation of the outer fan fan 12 is changed to the wind pushed out in the radial direction by the outer fan fan 12, The wind direction changes by hitting the tip surface 33 a of the blade 33 spread in the circumferential direction, and the wind easily flows in the axial direction of the rotating electrical machine body 11. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
また、別の一例として、図５と図６に、この発明の実施例１を示す回転電機のファンの羽根形状の概念図を示す。図５と図６において、３４は羽根であり、側板３２の周りに複数枚設置される。３４ａと３４ｂは羽根３４の軸中心から遠い面である先端面である。図５に示す先端面３４ａは、図４に示した周方向に広げた先端面３３ａを斜めの形状に変更したものであり、その結果、羽根３４の径方向の高さは、先端面３４ａが軸方向に沿って外扇カバー２４側に低くなるように傾斜する。また、図６に示す３４ｂのように、先端面の一部分だけを斜めの形状に変更しても良い。
As another example, FIGS. 5 and 6 are conceptual views of the blade shape of a fan of a rotating electrical machine showing Embodiment 1 of the present invention. 5 and 6, reference numeral 34 denotes a blade, and a plurality of blades are installed around the side plate 32. Reference numerals 34 a and 34 b are front end surfaces which are surfaces far from the axial center of the blade 34. The tip surface 34a shown in FIG. 5 is obtained by changing the tip surface 33a widened in the circumferential direction shown in FIG. 4 into a slanted shape. It inclines so that it may become low toward the outer fan cover 24 side along an axial direction. Further, as shown by 34b in FIG. 6, only a part of the front end surface may be changed to an oblique shape.
図５と図６に示す回転電機の外扇ファンを用いることで、外扇ファン１２の回転により吸い込まれた風が、外扇ファン１２により径方向へ押し出された風へと変化した後、周方向に広げられた羽根３４の先端面３４ａや３４ｂに当たることで風向きが変わり、回転電機本体１１の軸方向へ風が流れやすくなる。しかも、羽根３４の先端面３４ａや３４ｂのように斜面にしていることにより、風が回転電機本体１１の軸方向へさらに流れやすくなる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。
By using the outer fan fan of the rotating electric machine shown in FIGS. 5 and 6, the wind sucked by the rotation of the outer fan fan 12 is changed to the wind pushed out in the radial direction by the outer fan fan 12. The direction of the wind is changed by hitting the tip surfaces 34 a and 34 b of the blades 34 that are spread in the direction, and the wind easily flows in the axial direction of the rotating electrical machine main body 11. In addition, the inclined surfaces such as the tip surfaces 34 a and 34 b of the blades 34 make it easier for the wind to flow in the axial direction of the rotating electrical machine body 11. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
なお、図５において、風を回転電機本体１１の軸方向へ流れやすくするために、羽根３４の先端面３４ａと軸方向がなす角度θは、３０度から６０度程度に設計している。図７に、この発明の実施例１を示す回転電機のファンの軸方向風量の羽根の傾き角度依存性を示す。図７の結果より、羽根３４の先端面３４ａと軸方向がなす角度θが４５度の時が最も軸方向への風量が大きくなる。角度θが４５度の時の風量を最大風量１００とすると、設計的には７０以上の風量で、従来よりも回転機本体１１を冷却することが可能となることが実験より判明しており、従って、角度θは略３０度から略６０度に設計することが望ましい。
In FIG. 5, in order to facilitate the flow of wind in the axial direction of the rotating electrical machine main body 11, the angle θ formed between the tip surface 34 a of the blade 34 and the axial direction is designed to be about 30 to 60 degrees. FIG. 7 shows the inclination angle dependency of the blades in the axial air volume of the fan of the rotating electrical machine according to the first embodiment of the present invention. From the result of FIG. 7, the air volume in the axial direction becomes the largest when the angle θ formed by the tip surface 34a of the blade 34 and the axial direction is 45 degrees. Experiments have shown that if the airflow when the angle θ is 45 degrees is the maximum airflow of 100, it is possible to cool the rotating machine body 11 more than conventional with an airflow of 70 or more in design, Therefore, it is desirable to design the angle θ from about 30 degrees to about 60 degrees.
また、別の一例として、図８に、この発明の実施例１を示す回転電機のファンの羽根形状の概念図を示す。図８において、３５は羽根であり、側板３２の周りに複数枚設置される。３５ａは羽根３５の軸中心から遠い面である先端面である。図８に示す先端面３５ａは、図４に示した周方向に広げた先端面３３ａを曲面形状に変更したものである。
As another example, FIG. 8 shows a conceptual diagram of a blade shape of a fan of a rotating electrical machine showing Embodiment 1 of the present invention. In FIG. 8, reference numeral 35 denotes a blade, and a plurality of blades are installed around the side plate 32. Reference numeral 35 a denotes a tip surface that is a surface far from the axial center of the blade 35. The tip surface 35a shown in FIG. 8 is obtained by changing the tip surface 33a widened in the circumferential direction shown in FIG. 4 into a curved shape.
図８に示す回転電機の外扇ファンを用いることで、外扇ファン１２の回転により吸い込まれた風が、外扇ファン１２により径方向へ押し出された風へと変化した後、周方向に広げられた羽根３５の先端面３５ａに当たることで風向きが変わり、回転電機本体１１の軸方向へ風が流れやすくなる。さらに、羽根３５の先端面３５ａのように曲面にしていることにより、風が回転電機本体１１の軸方向へ流れる時の空気抵抗が軽減され、風が流れやすくなる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。
By using the outer fan fan of the rotating electric machine shown in FIG. 8, the wind sucked by the rotation of the outer fan fan 12 is changed to the wind pushed out in the radial direction by the outer fan fan 12, and then spread in the circumferential direction. The wind direction is changed by hitting the tip surface 35 a of the blades 35, and the wind easily flows in the axial direction of the rotating electrical machine body 11. Furthermore, by making it curved like the front end surface 35a of the blade 35, the air resistance when the wind flows in the axial direction of the rotating electrical machine main body 11 is reduced, and the wind easily flows. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
図４から図８においては、効果的に回転電機本体１１の軸方向へ風を流しやすくするファンの羽根形状について、概念図を用いて説明してきたが、図９に、この発明の実施例１を示す回転電機のファンの羽根形状を適用した外扇ファンの実用例を示す。図９において、４０は実用例としての外扇ファン、４１は側板、４２は羽根、４２ａは羽根４２に設けられた曲面である。外扇ファン４０は、側板４１と側板４１の周りに複数枚設置される羽根４２から構成されている。図９に示す羽根４２において、径方向の高さは外扇カバー１４側の羽根４２の先端面の一部が軸方向に沿って外扇カバー１４側に低くなるようにしている。
4 to 8, the fan blade shape that facilitates the flow of wind in the axial direction of the rotating electrical machine main body 11 has been described using conceptual diagrams. FIG. 9 illustrates a first embodiment of the present invention. The practical example of the external fan which applied the blade | wing shape of the fan of the rotary electric machine which shows is shown. In FIG. 9, reference numeral 40 denotes an outer fan as a practical example, 41 a side plate, 42 a blade, and 42 a a curved surface provided on the blade 42. The outer fan 40 includes a side plate 41 and a plurality of blades 42 installed around the side plate 41. In the blade 42 shown in FIG. 9, the height in the radial direction is such that a part of the tip surface of the blade 42 on the outer fan cover 14 side is lowered toward the outer fan cover 14 along the axial direction.
羽根４２には、実際に風が当たる羽根４２の先端面の下側に、適切に設計された曲面４２ａが設けられている。羽根４２に曲面４２ａを設けることで、空気抵抗を下げることができ、風が流れやすくなる。また、全ての羽根４２の軸方向に垂直な断面形状が、略Ｔ字形状であるため、回転電機の回転方向である正転あるいは逆転によらず同一の冷却性能を得ることができる。
The blade 42 is provided with a suitably designed curved surface 42a on the lower side of the tip surface of the blade 42 where the wind actually hits. By providing the blade 42 with the curved surface 42a, the air resistance can be lowered and the wind can easily flow. Moreover, since the cross-sectional shape perpendicular | vertical to the axial direction of all the blade | wings 42 is a substantially T shape, the same cooling performance can be acquired irrespective of the normal rotation or reverse rotation which is a rotation direction of a rotary electric machine.
図１０は、この発明の実施例１を示す回転電機の外扇ファンによる風の流れの説明図である。図１０において、５１は外扇ファンの回転により吸い込まれた風、５２は外扇ファン、５３は径方向へ押し出された風、５４は羽根、５４ａは羽根５４の周方向に広げられた先端部分、５５は軸方向へ吐き出される風である。外扇ファン５２の回転により吸い込まれた風５１は、外扇ファン５２により径方向へ押し出された風５３へと変化し、外扇ファン５２の羽根５４の周方向に広げられた先端部分５４ａに当たることで風向きが変わり、回転電機本体１１の軸方向へ吐き出される風５５となり、効果的に回転電機本体１１を冷却することができる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。
FIG. 10 is an explanatory diagram of the flow of wind by the outer fan of the rotating electric machine showing the first embodiment of the present invention. In FIG. 10, 51 is the wind sucked by the rotation of the outer fan fan, 52 is the outer fan fan, 53 is the wind pushed out in the radial direction, 54 is the blade, 54a is the tip portion that is spread in the circumferential direction of the blade 54 , 55 are winds discharged in the axial direction. The wind 51 sucked by the rotation of the outer fan fan 52 is changed to the wind 53 pushed in the radial direction by the outer fan fan 52, and hits the tip end portion 54a spread in the circumferential direction of the blades 54 of the outer fan fan 52. Thus, the direction of the wind is changed, and the wind 55 is discharged in the axial direction of the rotating electrical machine main body 11, and the rotating electrical machine main body 11 can be effectively cooled. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
実施例２．
図１１と図１２は、この発明の実施例２を示す回転電機のファンの羽根形状の概念図である。図１１と図１２において、３６と３７は側板３２の周りに複数枚設置される羽根、３６ａは羽根３６の軸中心から遠い面である先端面、３６ｂと３６ｃは羽根３６の中間部分に周方向に左右対称で広げた構造部である。３７ａは羽根３７の軸中心から遠い面である先端面、３７ｂと３７ｃは羽根３７の中間部分に周方向に左右対称で広げた構造部である。図１１に示すように、羽根３６は、羽根３６の先端面３６ａを周方向に左右対称で広げるだけでなく、さらに、軸の径方向における中間部分にも離散的に複数の周方向に左右対称で広げる構造部３６ｂと３６ｃを設けた構造を有している。このような羽根構造にすることで、回転電機本体１１の軸方向への風量が上がる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。 Example 2
11 and 12 are conceptual views of the blade shape of a fan of a rotating electricalmachine showing Embodiment 2 of the present invention. 11 and 12, 36 and 37 are blades installed around the side plate 32, 36a is a tip surface which is a surface far from the axial center of the blade 36, and 36b and 36c are circumferentially arranged in the middle part of the blade 36. The structure is symmetrically expanded. Reference numeral 37 a denotes a front end surface that is a surface far from the axial center of the blade 37, and 37 b and 37 c are structures that are symmetrically expanded in the circumferential direction in the middle portion of the blade 37. As shown in FIG. 11, the blade 36 not only widens the front end surface 36 a of the blade 36 in the circumferential direction symmetrically, but also discretely symmetrically in a plurality of circumferential directions in the intermediate portion in the radial direction of the shaft. It has a structure provided with structure parts 36b and 36c which are spread out. By using such a blade structure, the air volume in the axial direction of the rotating electrical machine body 11 is increased. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
図１１と図１２は、この発明の実施例２を示す回転電機のファンの羽根形状の概念図である。図１１と図１２において、３６と３７は側板３２の周りに複数枚設置される羽根、３６ａは羽根３６の軸中心から遠い面である先端面、３６ｂと３６ｃは羽根３６の中間部分に周方向に左右対称で広げた構造部である。３７ａは羽根３７の軸中心から遠い面である先端面、３７ｂと３７ｃは羽根３７の中間部分に周方向に左右対称で広げた構造部である。図１１に示すように、羽根３６は、羽根３６の先端面３６ａを周方向に左右対称で広げるだけでなく、さらに、軸の径方向における中間部分にも離散的に複数の周方向に左右対称で広げる構造部３６ｂと３６ｃを設けた構造を有している。このような羽根構造にすることで、回転電機本体１１の軸方向への風量が上がる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。 Example 2
11 and 12 are conceptual views of the blade shape of a fan of a rotating electrical
また、図１２に示すように、羽根３７は、羽根３７の先端面３７ａを大きく周方向に広げ、かつ軸中心に向かうにつれて中間部分に周方向に左右対称で広げた構造部３７ｂと３７ｃの周方向に広げる量を段階的に小さくするような構造を有していても良い。このような羽根構造にすることで、全ての周方向に広げた部分に対して風が当たるようになるので、さらに回転電機本体の軸方向への風量が上がる。その結果、冷却性能が向上するため、回転電機の高効率化が可能になる。
Also, as shown in FIG. 12, the blade 37 has a circumferential surface of the structure portions 37b and 37c in which the tip end surface 37a of the blade 37 is greatly expanded in the circumferential direction and is expanded symmetrically in the circumferential direction in the intermediate portion toward the axial center. You may have a structure which makes small the quantity expanded to a direction in steps. By adopting such a blade structure, wind comes into contact with all the expanded parts in the circumferential direction, so that the air volume in the axial direction of the rotating electrical machine body is further increased. As a result, since the cooling performance is improved, the efficiency of the rotating electrical machine can be increased.
さらに、図１３は、この発明の実施例２を示す回転電機のファンの羽根形状の概念図である。図１３において、３８は側板３２の周りに複数枚設置される羽根、３８ａは羽根３８の軸の中心軸に向かうにつれて、連続的にかつ階段状に小さくなるように広げた構造部である。図１３に示すように、羽根３８の先端面３８ａを大きく周方向に広げ、軸中心に向かうにつれて、先端面３８ａの下部から周方向に広げる量を階段状に小さくなるような３８ａの構造を有していても同様の効果を得ることができる。加えて、このような羽根構造にすることで、羽根の工作性が良くなり、周方向に広げる部分の強度を向上させることができる。
Furthermore, FIG. 13 is a conceptual diagram of the blade shape of a fan of a rotating electrical machine showing Embodiment 2 of the present invention. In FIG. 13, reference numeral 38 denotes a plurality of blades installed around the side plate 32, and reference numeral 38 a denotes a structure that is expanded so as to decrease continuously and stepwise as it goes toward the central axis of the blade 38. As shown in FIG. 13, the tip end surface 38a of the blade 38 is widened in the circumferential direction, and the amount of the tip 38a extending in the circumferential direction from the lower portion of the tip end surface 38a decreases stepwise as it goes toward the axial center. Even if it does, the same effect can be acquired. In addition, by using such a blade structure, the workability of the blade is improved, and the strength of the portion extending in the circumferential direction can be improved.
実施例２において、図１１、図１２及び図１３は、実施例１で説明した図４を基本構造にして説明したが、図５、図６、及び図８に対しても、同様に適用することが可能である。また、空気抵抗を下げる目的で、図９で説明したような、実際に風が当たる羽根４２の先端面の下側に適当な曲面４２ａを設ける構造を、図１１、図１２及び図１３に適用することも可能である。
In the second embodiment, FIGS. 11, 12 and 13 have been described based on the basic structure of FIG. 4 described in the first embodiment, but the same applies to FIGS. 5, 6 and 8. It is possible. For the purpose of reducing the air resistance, a structure in which an appropriate curved surface 42a is provided on the lower side of the front end surface of the blade 42 to which the wind actually hits as described in FIG. 9 is applied to FIGS. 11, 12, and 13. It is also possible to do.
実施例３．
図１４は、この発明の実施例３を示す回転電機のファンの羽根形状の概念図である。図１４において、３９は側板３２の周りに複数枚設置される羽根、３９ａは羽根３９の軸中心から遠い面である先端面である。図１４に示すように、羽根３９は、羽根３９の先端面３９ａが周方向に左右対称に広げた部分に傾斜を付けて、周方向の幅が軸方向に沿って外扇カバー２４の方向に向かって広くなる構造を有している。このような羽根構造にすることで、羽根３９の先端面３９ａに当たり向きが変わった風を妨げる部分を減らすことができ、スムーズに風を流すことが可能になる。また、外扇ファン２１の羽根部分の重さを減らすことができ、軽量化が図れる。 Example 3 FIG.
FIG. 14 is a conceptual diagram of a fan blade shape of a rotating electricalmachine showing Embodiment 3 of the present invention. In FIG. 14, 39 is a plurality of blades installed around the side plate 32, and 39 a is a tip surface that is a surface far from the axial center of the blades 39. As shown in FIG. 14, the blade 39 is inclined at a portion where the tip end surface 39 a of the blade 39 is symmetrically widened in the circumferential direction, and the width in the circumferential direction extends in the direction of the outer fan cover 24 along the axial direction. It has a structure that becomes wider. By adopting such a blade structure, it is possible to reduce the portion that obstructs the wind whose direction of contact has changed against the tip surface 39a of the blade 39, so that the wind can flow smoothly. Moreover, the weight of the blade | wing part of the outer fan fan 21 can be reduced, and weight reduction can be achieved.
図１４は、この発明の実施例３を示す回転電機のファンの羽根形状の概念図である。図１４において、３９は側板３２の周りに複数枚設置される羽根、３９ａは羽根３９の軸中心から遠い面である先端面である。図１４に示すように、羽根３９は、羽根３９の先端面３９ａが周方向に左右対称に広げた部分に傾斜を付けて、周方向の幅が軸方向に沿って外扇カバー２４の方向に向かって広くなる構造を有している。このような羽根構造にすることで、羽根３９の先端面３９ａに当たり向きが変わった風を妨げる部分を減らすことができ、スムーズに風を流すことが可能になる。また、外扇ファン２１の羽根部分の重さを減らすことができ、軽量化が図れる。 Example 3 FIG.
FIG. 14 is a conceptual diagram of a fan blade shape of a rotating electrical
実施例３において、図１４は、実施例１で説明した図４を基本構造にして説明したが、図５、図６、及び図８、さらには、実施例２で説明した図１１、図１２、及び図１３に対しても、同様に適用することが可能である。また、空気抵抗を下げる目的で、図９で説明したような、実際に風が当たる羽根４２の先端面の下側に適当な曲面４２ａを設ける構造を、図１４に適用することも可能である。
In the third embodiment, FIG. 14 is described based on the basic structure of FIG. 4 described in the first embodiment, but FIG. 5, FIG. 6 and FIG. 8, and FIG. 11 and FIG. 12 described in the second embodiment. , And FIG. 13 can be similarly applied. For the purpose of reducing the air resistance, a structure in which an appropriate curved surface 42a is provided on the lower side of the front end surface of the blade 42 to which the wind actually hits as described in FIG. 9 can be applied to FIG. .
１１、２５ 回転電機本体、１２、２１、４０、５２ 外扇ファン、１３ 回転軸、１４、２４ 外扇カバー、２２、５１ 吸い込まれた風、２３、５３ 押し出された風、２６、５５ 吐き出される風、３１、３３、３４、３５、３６、３７、３８、３９、４２、５４ 羽根、３１ａ、３３ａ、３４ａ、３４ｂ、３５ａ、３６ａ、３７ａ、３８ａ、３９ａ、５４ａ 羽根の先端面、３２、４１ 側板、３６ｂ、３６ｃ、３７ｂ、３７ｃ 羽根の構造部、４２ａ 羽根下部に設けた曲面、
11, 25, rotating electric machine main body, 12, 21, 40, 52 outer fan fan, 13 rotating shaft, 14, 24 outer fan cover, 22, 51 sucked wind, 23, 53 extruded wind, 26, 55 discharged Wind, 31, 33, 34, 35, 36, 37, 38, 39, 42, 54 blades, 31a, 33a, 34a, 34b, 35a, 36a, 37a, 38a, 39a, 54a blade tip surfaces, 32, 41 Side plate, 36b, 36c, 37b, 37c blade structure, 42a curved surface provided at the bottom of the blade,
Claims (11)
- 回転軸に固定され回転中心から放射状に延伸する複数の羽根を有する外扇ファンと、該外扇ファンを覆い前記外扇ファンに対向する位置に開口部を有する外扇カバーと、回転電機外部に空気を吐出する吐出し口とを備えた回転電機において、
前記羽根は、前記回転軸の径方向の先端面全面もしくは一部が径方向に所定の厚みを有し、周方向に広げた形状であることを特徴とする回転電機。 An outer fan fan having a plurality of blades fixed to the rotating shaft and extending radially from the center of rotation, an outer fan cover covering the outer fan fan and having an opening at a position facing the outer fan fan, and outside the rotating electrical machine In a rotating electrical machine having a discharge port for discharging air,
The rotary electric machine is characterized in that the blade has a shape in which a whole or a part of a front end surface in the radial direction of the rotating shaft has a predetermined thickness in the radial direction and is widened in the circumferential direction. - 前記羽根の径方向の高さは、前記先端面全面もしくは一部が軸方向に沿って前記外扇カバー側に低くなるように傾斜していることを特徴とする請求項１に記載の回転電機。 2. The rotating electrical machine according to claim 1, wherein a height of the blade in a radial direction is inclined such that the entire front end surface or a part of the blade is lowered toward the outer fan cover along the axial direction. .
- 前記羽根の径方向の高さの傾斜角度は、略３０度から略６０度であることを特徴とする請求項２に記載の回転電機。 The rotating electrical machine according to claim 2, wherein an inclination angle of the radial height of the blade is approximately 30 degrees to approximately 60 degrees.
- 前記羽根の軸方向に垂直な断面形状は略Ｔ字形状であり、放射状の中心線に対して線対称であることを特徴とする請求項１乃至請求項３のいずれかに記載の回転電機。 The rotary electric machine according to any one of claims 1 to 3, wherein a cross-sectional shape perpendicular to the axial direction of the blade is a substantially T-shape and is symmetrical with respect to a radial center line.
- 前記羽根の前記先端面全面もしくは一部の周方向の両側面は、曲面形状であることを特徴とする請求項１乃至請求項３のいずれかに記載の回転電機。 4. The rotating electrical machine according to claim 1, wherein the entire front end surface of the blade or a part of both side surfaces in the circumferential direction have a curved shape.
- 前記羽根の径方向には、軸方向に沿って前記先端面と平行であると共に、周方向に広がる構造部を複数有することを特徴とする請求項１乃至請求項５のいずれかに記載の回転電機。 The rotation according to any one of claims 1 to 5, wherein a plurality of structural portions extending in the circumferential direction are provided in the radial direction of the blade in parallel to the tip surface along the axial direction. Electric.
- 前記構造部は、前記羽根の径方向に沿って離散的に存在することを特徴とする請求項６に記載の回転電機。 The rotating electrical machine according to claim 6, wherein the structure part is present discretely along a radial direction of the blade.
- 前記構造部の周方向の幅は、前記先端面の幅と同じであることを特徴とする請求項７に記載の回転電機。 The rotating electrical machine according to claim 7, wherein the circumferential width of the structural portion is the same as the width of the tip surface.
- 前記構造部の周方向の幅は、前記先端面から軸中心の方向に沿って段階的に小さいことを特徴とする請求項７に記載の回転電機。 The rotating electrical machine according to claim 7, wherein a width of the structure portion in a circumferential direction is gradually reduced from the distal end surface along a direction of an axial center.
- 前記構造部は、軸中心の方向に沿って前記先端面下部から連続して存在すると共に、周方向の幅が前記先端面から階段状に小さいことを特徴とする請求項６に記載の回転電機。 The rotating electrical machine according to claim 6, wherein the structure portion is continuously present from a lower portion of the tip surface along a direction of an axis center, and a width in a circumferential direction is small stepwise from the tip surface. .
- 前記羽根の前記先端面の周方向の幅は、軸方向に沿って前記外扇カバー側に広いことを特徴とする請求項１乃至請求項１０のいずれかに記載の回転電機。 11. The rotating electrical machine according to claim 1, wherein a circumferential width of the tip surface of the blade is wider toward the outer fan cover along the axial direction.
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| WO (1) | WO2015104731A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6840297B1 (en) * | 2019-12-25 | 2021-03-10 | 三菱電機株式会社 | External fan fan and rotary electric machine |
| WO2022025911A1 (en) * | 2020-07-31 | 2022-02-03 | Safran Power Usa, Llc | Rotating machine with cooling fan |
| JP7254218B1 (en) | 2022-01-07 | 2023-04-07 | 三菱電機株式会社 | Rotating electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS51138705U (en) * | 1975-04-30 | 1976-11-09 | ||
| JPS5761198U (en) * | 1980-09-30 | 1982-04-10 | ||
| JPS61107999U (en) * | 1984-12-20 | 1986-07-09 | ||
| JP2003088045A (en) * | 2001-09-12 | 2003-03-20 | Toshiba Transport Eng Inc | Totally enclosed fan-cooled motor |
| JP2008064011A (en) * | 2006-09-07 | 2008-03-21 | Calsonic Kansei Corp | Motor cooling structure of motor fan |
| JP5129993B2 (en) * | 2007-06-25 | 2013-01-30 | 株式会社日立産機システム | Rotating electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51138705U (en) * | 1975-04-30 | 1976-11-09 | ||
| JPS5761198U (en) * | 1980-09-30 | 1982-04-10 | ||
| JPS61107999U (en) * | 1984-12-20 | 1986-07-09 | ||
| JP2003088045A (en) * | 2001-09-12 | 2003-03-20 | Toshiba Transport Eng Inc | Totally enclosed fan-cooled motor |
| JP2008064011A (en) * | 2006-09-07 | 2008-03-21 | Calsonic Kansei Corp | Motor cooling structure of motor fan |
| JP5129993B2 (en) * | 2007-06-25 | 2013-01-30 | 株式会社日立産機システム | Rotating electric machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6840297B1 (en) * | 2019-12-25 | 2021-03-10 | 三菱電機株式会社 | External fan fan and rotary electric machine |
| WO2021130924A1 (en) * | 2019-12-25 | 2021-07-01 | 三菱電機株式会社 | Outer fan and rotating electric machine |
| WO2022025911A1 (en) * | 2020-07-31 | 2022-02-03 | Safran Power Usa, Llc | Rotating machine with cooling fan |
| JP7254218B1 (en) | 2022-01-07 | 2023-04-07 | 三菱電機株式会社 | Rotating electric machine |
| JP2023101042A (en) * | 2022-01-07 | 2023-07-20 | 三菱電機株式会社 | Rotary electric machine |
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