JP6376981B2 - Rotating device - Google Patents

Rotating device Download PDF

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Publication number
JP6376981B2
JP6376981B2 JP2015008727A JP2015008727A JP6376981B2 JP 6376981 B2 JP6376981 B2 JP 6376981B2 JP 2015008727 A JP2015008727 A JP 2015008727A JP 2015008727 A JP2015008727 A JP 2015008727A JP 6376981 B2 JP6376981 B2 JP 6376981B2
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Prior art keywords
intake port
auxiliary intake
fan
rotating device
load side
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JP2015008727A
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JP2016135026A (en
Inventor
石塚　正幸
正幸 石塚
稔也 南雲
稔也 南雲
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Sumitomo Heavy Industries Ltd
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Sumitomo Heavy Industries Ltd
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Priority to JP2015008727A priority Critical patent/JP6376981B2/en
Priority to CN201510623453.4A priority patent/CN105811660B/en
Priority to DE102015121695.7A priority patent/DE102015121695A1/en
Publication of JP2016135026A publication Critical patent/JP2016135026A/en
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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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • 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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)

Description

本発明は、回転装置に関する。   The present invention relates to a rotating device.

回転軸にファンが取り付けられた回転装置が知られている。この回転装置では、ファンによって回転装置本体に送風することにより、回転装置本体を冷却する。従来では、例えば特許文献１に記載されるような回転装置が提案されている。   A rotating device having a fan attached to a rotating shaft is known. In this rotating device, the rotating device body is cooled by blowing air to the rotating device body by a fan. Conventionally, for example, a rotating device as described in Patent Document 1 has been proposed.

特開２０１０−２０６９９１号公報JP 2010-206991 A

搭載先の装置の小型化等のため、回転装置にも小型化が求められる。回転装置が小型化すると、放熱面積が減少するため、冷却性能が低下する。   In order to reduce the size of the mounting device, the rotating device is also required to be downsized. When the rotating device is downsized, the heat radiation area is reduced, so that the cooling performance is lowered.

ファンを備える回転装置の冷却性能を高める手法として、ファンの羽根を大きくしたり、ファンの羽根の枚数を増やすことが考えられる。しかしながら一般に、ファンの羽根を大きくしたり、ファンの羽根の枚数を増やすと、空力騒音が大きくなる。また、風損も大きくなる。   As a technique for improving the cooling performance of a rotating device including a fan, it is conceivable to increase the fan blades or increase the number of fan blades. However, generally, when the fan blades are increased or the number of fan blades is increased, aerodynamic noise increases. Moreover, a windage loss also becomes large.

本発明は、こうした状況に鑑みてなされたものであり、その目的は、空力騒音や風損の増大を抑えつつ、冷却性能を高められる回転装置を提供することにある。   The present invention has been made in view of such circumstances, and an object thereof is to provide a rotating device capable of improving cooling performance while suppressing an increase in aerodynamic noise and windage loss.

上記課題を解決するために、本発明のある態様の回転装置は、回転軸と、回転軸の反負荷側端部に設けられるファンと、ファンを覆うファンカバーと、を備える回転装置であって、ファンカバーは、ファンの径方向外側を覆う筒状部と、筒状部の反負荷側端部を閉塞する蓋部と、蓋部に設けられた吸気口と、を有し、筒状部の負荷側端部は回転装置本体側に開口し、ファンカバーは、筒状部に補助吸気口を有し、補助吸気口は、少なくとも一部がファンよりも負荷側に位置する。   In order to solve the above-described problem, a rotating device according to an aspect of the present invention is a rotating device including a rotating shaft, a fan provided at a non-load side end of the rotating shaft, and a fan cover that covers the fan. The fan cover includes a cylindrical portion that covers the outer side of the fan in the radial direction, a lid portion that closes an end portion on the non-load side of the cylindrical portion, and an air inlet provided in the lid portion. The end of the load side opens to the rotating device main body side, the fan cover has an auxiliary intake port in the cylindrical part, and at least a part of the auxiliary intake port is located on the load side of the fan.

この態様によると、ファンの蓋部に設けられた吸気口に加え、ファンの径方向外側を覆う筒状部に設けられた補助吸気口からもファンカバー内に空気が流入する。これにより、ファンカバー内に流入する空気の量が増加し、ファンカバーから回転装置本体側に供給される空気の量が増加する。   According to this aspect, air flows into the fan cover from the auxiliary air inlet provided in the cylindrical portion that covers the outside in the radial direction of the fan, in addition to the air inlet provided in the lid portion of the fan. As a result, the amount of air flowing into the fan cover increases, and the amount of air supplied from the fan cover to the rotating device main body increases.

なお、以上の構成要素の任意の組み合わせや、本発明の構成要素や表現を方法、装置、システムなどの間で相互に置換したものもまた、本発明の態様として有効である。   Note that any combination of the above-described constituent elements, and those obtained by replacing the constituent elements and expressions of the present invention with each other among methods, apparatuses, systems, etc. are also effective as an aspect of the present invention.

本発明によれば、空力騒音や風損の増大を抑えつつ、冷却性能を高められる。   According to the present invention, the cooling performance can be enhanced while suppressing an increase in aerodynamic noise and windage loss.

実施の形態に係る回転装置の斜視図である。It is a perspective view of the rotation apparatus concerning an embodiment. 図１の回転装置の縦断面図である。It is a longitudinal cross-sectional view of the rotation apparatus of FIG. 図２のファンおよびファンカバーの周辺を拡大して示す拡大断面図である。FIG. 3 is an enlarged cross-sectional view showing the periphery of the fan and fan cover of FIG. 2 in an enlarged manner. 実施の形態の変形例に係る回転装置のファンおよびファンカバーの周辺を拡大して示す拡大断面図である。It is an expanded sectional view which expands and shows the periphery of the fan and fan cover of the rotating apparatus which concern on the modification of embodiment.

以下、各図面に示される同一または同等の構成要素、部材には、同一の符号を付するものとし、適宜重複した説明は省略する。また、各図面における部材の寸法は、理解を容易にするために適宜拡大、縮小して示される。また、各図面において実施の形態を説明する上で重要ではない部材の一部は省略して表示する。   Hereinafter, the same or equivalent components and members shown in the respective drawings are denoted by the same reference numerals, and repeated descriptions thereof are omitted as appropriate. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, in the drawings, some of the members that are not important for describing the embodiment are omitted.

図１は、実施の形態に係る回転装置１０の斜視図である。図２は、回転装置１０の縦断面図である。回転装置１０は、外部に動力を与えるモータ１２と、モータ１２を冷却するためのファン１４と、ファン１４を覆うファンカバー１６と、を備える。   FIG. 1 is a perspective view of a rotating device 10 according to an embodiment. FIG. 2 is a longitudinal sectional view of the rotating device 10. The rotating device 10 includes a motor 12 that supplies power to the outside, a fan 14 that cools the motor 12, and a fan cover 16 that covers the fan 14.

モータ１２は、モータ軸１８と、モータフレーム２０と、モータフィン２２と、第１軸受２４と、第２軸受２６と、固定子鉄心２８と、固定子巻線３０と、回転子鉄心３２と、導体３４と、を備える。   The motor 12 includes a motor shaft 18, a motor frame 20, motor fins 22, a first bearing 24, a second bearing 26, a stator core 28, a stator winding 30, a rotor core 32, And a conductor 34.

モータフレーム２０は、ハウジング３６と、第１ブラケット３８と、第２ブラケット４０と、を含む。ハウジング３６は、円筒状に形成される。第１ブラケット３８は、ハウジング３６の反負荷側端部に結合され、第１軸受２４を介してモータ軸１８を回転自在に支持する。第２ブラケット４０は、ハウジング３６の負荷側端部に結合され、第２軸受２６を介してモータ軸１８を回転自在に支持する。   The motor frame 20 includes a housing 36, a first bracket 38, and a second bracket 40. The housing 36 is formed in a cylindrical shape. The first bracket 38 is coupled to the opposite end portion of the housing 36 and supports the motor shaft 18 via the first bearing 24 so as to be rotatable. The second bracket 40 is coupled to the load side end portion of the housing 36 and supports the motor shaft 18 through the second bearing 26 so as to be rotatable.

モータフレーム２０内には、固定子鉄心２８、固定子巻線３０、回転子鉄心３２および導体３４が収容される。モータフレーム２０は、例えばアルミダイキャスト製、鋳鉄製または鋼板製であり、固定子鉄心２８、固定子巻線３０、回転子鉄心３２および導体３４の重量の支持するとともに、固定子鉄心２８、固定子巻線３０、回転子鉄心３２および導体３４が発する熱を外部に放熱する。   In the motor frame 20, a stator core 28, a stator winding 30, a rotor core 32 and a conductor 34 are accommodated. The motor frame 20 is made of, for example, aluminum die cast, cast iron, or steel plate, and supports the weight of the stator core 28, the stator winding 30, the rotor core 32, and the conductor 34, and the stator core 28, fixed Heat generated by the child winding 30, the rotor core 32, and the conductor 34 is radiated to the outside.

モータフィン２２は、ハウジング３６の外周に設けられる。モータフィン２２は特に、モータ軸１８の延在方向（すなわち軸方向）に沿って延在するよう、ハウジング３６の外周に設けられる。モータフィン２２は、ハウジング３６と一体に形成されても、別々に形成された後にハウジング３６に結合されてもよい。このフィンにより、モータフレーム２０の放熱性能が高められる。   The motor fins 22 are provided on the outer periphery of the housing 36. In particular, the motor fins 22 are provided on the outer periphery of the housing 36 so as to extend along the extending direction (that is, the axial direction) of the motor shaft 18. The motor fins 22 may be formed integrally with the housing 36 or may be separately formed and then coupled to the housing 36. The heat dissipation performance of the motor frame 20 is enhanced by the fins.

固定子鉄心２８は、ハウジング３６の内周面３６ａに固着される。固定子鉄心２８に形成された複数のスロットルには固定子巻線３０が巻き回される。回転子鉄心３２は、モータ軸１８に固定される。回転子鉄心３２に形成された複数のスロットルには、例えばアルミニウム製の導体３４が鋳込まれる。   The stator core 28 is fixed to the inner peripheral surface 36 a of the housing 36. A stator winding 30 is wound around a plurality of throttles formed on the stator core 28. The rotor core 32 is fixed to the motor shaft 18. For example, aluminum conductors 34 are cast into the plurality of throttles formed in the rotor core 32.

モータ軸１８の反負荷側は、第１ブラケット３８から突出する。この突出部の反負荷側端部にはファン１４が固定される。ファン１４はモータ軸１８と一体に回転する。ファンカバー１６は、略カップ状の所定の形状に形成され、開口がモータ１２側を向いた状態でモータフレーム２０に固定される。このファンカバー１６によってファン１４が覆われる。   The non-load side of the motor shaft 18 protrudes from the first bracket 38. A fan 14 is fixed to the end of the protruding portion opposite to the load. The fan 14 rotates integrally with the motor shaft 18. The fan cover 16 is formed in a predetermined substantially cup shape, and is fixed to the motor frame 20 with the opening facing the motor 12 side. The fan cover 16 covers the fan 14.

図３は、図２のファン１４およびファンカバー１６の周辺を拡大して示す拡大断面図である。図３に加えて図１を参照しながらファン１４およびファンカバー１６についてさらに詳細に説明する。ファンカバー１６は、筒状部４２と、傾斜部４４と、蓋部４６と、複数のガイド部材４８と、を含む。筒状部４２は、ハウジング３６と略等しい径を有する円筒状に形成され、ファン１４の径方向外側を覆う。なお、筒状部４２は、角筒状やその他の形状に形成されてもよい。筒状部４２には、周方向に並ぶ複数の補助吸気口５２が形成される。   FIG. 3 is an enlarged sectional view showing the periphery of the fan 14 and the fan cover 16 in FIG. 2 in an enlarged manner. The fan 14 and the fan cover 16 will be described in more detail with reference to FIG. 1 in addition to FIG. The fan cover 16 includes a tubular portion 42, an inclined portion 44, a lid portion 46, and a plurality of guide members 48. The cylindrical portion 42 is formed in a cylindrical shape having a diameter substantially equal to that of the housing 36 and covers the radially outer side of the fan 14. The cylindrical portion 42 may be formed in a rectangular tube shape or other shapes. The cylindrical portion 42 is formed with a plurality of auxiliary intake ports 52 arranged in the circumferential direction.

各補助吸気口５２は、その少なくとも一部がファン１４よりも負荷側（図３では左側）に位置するよう形成される。別の言い方をすると、各補助吸気口５２は、径方向から見たとき、その少なくとも一部がファン１４と重複しないよう形成される。図３に示す実施の形態では、各補助吸気口５２は、その全体がファン１４よりも負荷側に位置するよう形成される。別の言い方をすると、図３に示す実施の形態では、各補助吸気口５２は、径方向から見たとき、その全体がファン１４と重複しないよう形成される。各補助吸気口５２の形状、大きさおよび個数は、実験により、高い冷却性能を実現しうる形状、大きさおよび個数に定めればよい。本実施の形態においては、補助吸気口５２は長方形状の貫通口とされ、周方向に８個設けられている。また、補助吸気口５２ごとに形状および大きさが異なっていてもよい。   Each auxiliary intake port 52 is formed so that at least a part thereof is positioned on the load side (left side in FIG. 3) with respect to the fan 14. In other words, each auxiliary intake port 52 is formed so that at least a part thereof does not overlap with the fan 14 when viewed from the radial direction. In the embodiment shown in FIG. 3, each auxiliary intake port 52 is formed so that the entirety thereof is located on the load side of the fan 14. In other words, in the embodiment shown in FIG. 3, each auxiliary intake port 52 is formed not to overlap with the fan 14 as a whole when viewed from the radial direction. The shape, size, and number of each auxiliary intake port 52 may be determined by experiment to the shape, size, and number that can realize high cooling performance. In the present embodiment, the auxiliary intake ports 52 are rectangular through-holes, and eight are provided in the circumferential direction. Further, the shape and size of each auxiliary intake port 52 may be different.

傾斜部４４は、筒状部４２の反負荷側に設けられる。傾斜部４４は、負荷側から反負荷側に行くにしたがって縮径する筒状に形成される。より具体的には、傾斜部４４は、負荷側から反負荷側に行くにしたがって、その内周面４４ａが小径となるよう形成される。別の言い方をすると、図３に示す縦断面で見たとき、傾斜部４４は、負荷側から反負荷側に行くにしたがってモータ軸１８に近づくようにモータ軸１８に対して傾斜する。   The inclined portion 44 is provided on the opposite side of the cylindrical portion 42. The inclined portion 44 is formed in a cylindrical shape whose diameter decreases from the load side to the anti-load side. More specifically, the inclined portion 44 is formed such that its inner peripheral surface 44a becomes smaller in diameter as it goes from the load side to the anti-load side. In other words, when viewed in the longitudinal section shown in FIG. 3, the inclined portion 44 is inclined with respect to the motor shaft 18 so as to approach the motor shaft 18 from the load side toward the anti-load side.

蓋部４６は、傾斜部４４の反負荷側に設けられる。蓋部４６は、円板状に形成され、傾斜部４４の反負荷側端部を閉塞する。蓋部４６には、貫通孔である複数の吸気口５０が形成されている。ファン１４が回転すると、各吸気口５０からファンカバー１６内に外気が吸い込まれる。   The lid portion 46 is provided on the opposite side of the inclined portion 44. The lid portion 46 is formed in a disc shape and closes the end portion on the counterload side of the inclined portion 44. The lid portion 46 has a plurality of air inlets 50 that are through holes. When the fan 14 rotates, outside air is sucked into the fan cover 16 from each intake port 50.

ガイド部材４８は、補助吸気口５２に対応して設けられ、反負荷側に開口するよう補助吸気口５２の径方向外側を覆う。具体的には、ガイド部材４８は、傾斜部５４と、平行部５６と、を含む。傾斜部５４は、反負荷側から負荷側に行くにしたがって筒状部４２に近づくようにモータ軸１８に対して傾斜する。傾斜部５４の負荷側端部は筒状部４２に結合される。平行部５６は、傾斜部５４の反負荷側に連続し、筒状部４２と平行に延在するよう形成される。実施の形態では、ガイド部材４８は、径方向から見たとき、筒状部４２と重複しないよう形成される。換言すれば、径方向から見たとき、ガイド部材４８の全体が補助吸気口５２と重なる。   The guide member 48 is provided corresponding to the auxiliary intake port 52 and covers the outer side in the radial direction of the auxiliary intake port 52 so as to open to the anti-load side. Specifically, the guide member 48 includes an inclined portion 54 and a parallel portion 56. The inclination part 54 inclines with respect to the motor shaft 18 so that it may approach the cylindrical part 42 as it goes to the load side from the anti-load side. The load side end of the inclined portion 54 is coupled to the cylindrical portion 42. The parallel part 56 is formed so as to be continuous with the anti-load side of the inclined part 54 and to extend in parallel with the cylindrical part 42. In the embodiment, the guide member 48 is formed so as not to overlap the cylindrical portion 42 when viewed from the radial direction. In other words, the entire guide member 48 overlaps the auxiliary intake port 52 when viewed from the radial direction.

ファン１４は、ラジアルファンであり、モータ軸１８に固定される円筒部６０と、円筒部６０から径方向外側に延びる複数の支持部６１と、支持部６１に設けられる複数の羽根６２と、を含む。各羽根６２は、平板状の部材であり、その主面は周方向を向いている。各羽根６２は、ファンカバー１６の傾斜部４４の内周面４４ａに対向する対向傾斜部６４を有する。対向傾斜部６４の負荷側端部６６は、ファンカバー１６の傾斜部４４の負荷側端部６８よりも反負荷側に位置する。また、羽根６２の反負荷側端部７０は、径方向における吸気口５０の最外端部７２よりも径方向内側まで延在する。   The fan 14 is a radial fan, and includes a cylindrical part 60 fixed to the motor shaft 18, a plurality of support parts 61 extending radially outward from the cylindrical part 60, and a plurality of blades 62 provided on the support part 61. Including. Each blade 62 is a plate-like member, and its main surface faces the circumferential direction. Each blade 62 has an opposing inclined portion 64 that faces the inner peripheral surface 44 a of the inclined portion 44 of the fan cover 16. The load side end portion 66 of the facing inclined portion 64 is located on the side opposite to the load side than the load side end portion 68 of the inclined portion 44 of the fan cover 16. Further, the counter-load side end portion 70 of the blade 62 extends radially inward from the outermost end portion 72 of the air inlet 50 in the radial direction.

以上のように構成された回転装置１０の動作を説明する。モータ軸１８を回転させるために、駆動電流が固定子巻線３０に供給される。その電流が固定子巻線３０を流れることにより、固定子鉄心２８に沿って磁束が発生する。この磁束によって回転子鉄心３２にトルクが与えられ、モータ軸１８が回転する。モータ軸１８が回転すると、モータ軸１８とともにファン１４も回転する。この回転により、蓋部４６の吸気口５０からファンカバー１６内に外気が流れ込む。吸気口５０から流れ込んだ空気は、ファン１４によって径方向外側に送り出され、筒状部４２や傾斜部４４に当たることによって反負荷側に向かう軸方向の流れに偏向され、筒状部４２と第１ブラケット３８との間の隙間７４を通ってモータフィン２２に供給される。また、吸気口５０から流入した空気が隙間７４を流れることによって隙間７４はファンカバー１６の外部より圧力が低くなり、ファンカバー１６の外部の空気が補助吸気口５２から隙間７４に流れ込む。補助吸気口５２から流れ込んだ空気は、吸気口５０から流れ込んだ空気と同様に、隙間７４を通ってモータフィン２２に供給される。つまり、モータフィン２２は、吸気口５０からの空気に加えて補助吸気口５２からの空気によって冷却される。   The operation of the rotating device 10 configured as described above will be described. In order to rotate the motor shaft 18, a drive current is supplied to the stator winding 30. When the current flows through the stator winding 30, magnetic flux is generated along the stator core 28. Torque is applied to the rotor core 32 by this magnetic flux, and the motor shaft 18 rotates. When the motor shaft 18 rotates, the fan 14 rotates with the motor shaft 18. Due to this rotation, outside air flows into the fan cover 16 from the air inlet 50 of the lid 46. The air flowing in from the air inlet 50 is sent out radially outward by the fan 14 and is deflected to the axial flow toward the non-load side by hitting the cylindrical portion 42 and the inclined portion 44, and the first cylindrical portion 42 and the first cylindrical portion 42. It is supplied to the motor fin 22 through a gap 74 between the bracket 38. Further, when the air flowing in from the intake port 50 flows through the gap 74, the pressure in the gap 74 is lower than the outside of the fan cover 16, and the air outside the fan cover 16 flows into the gap 74 from the auxiliary intake port 52. The air flowing from the auxiliary intake port 52 is supplied to the motor fin 22 through the gap 74 in the same manner as the air flowing from the intake port 50. That is, the motor fin 22 is cooled by the air from the auxiliary air intake 52 in addition to the air from the air intake 50.

以上説明した実施の形態に係る回転装置１０によると、ファンカバー１６の筒状部４２に、少なくとも一部がファン１４よりも負荷側に位置する補助吸気口５２が形成される。ファンカバー１６の外部の空気がこの補助吸気口５２からファンカバー１６内に流れ込み、吸気口５０からファンカバー１６内に流れ込んだ空気と合流する。そのため、補助吸気口５２を有しない場合に比べてモータフィン２２に供給される空気の量が増加する。これにより、モータフィン２２を冷却する効果が高まり、モータフィン２２ひいてはモータ１２内の温度上昇を抑止できる。つまり、ファンの羽根を大きくしたりファンの羽根の枚数を増やすことなく、すなわち空力騒音や風損（動力損失）の増大を抑えつつ、冷却性能を高めることができる。   According to the rotating device 10 according to the embodiment described above, the auxiliary air inlet 52 at least a part of which is located on the load side of the fan 14 is formed in the cylindrical portion 42 of the fan cover 16. Air outside the fan cover 16 flows into the fan cover 16 from the auxiliary air inlet 52 and merges with air that flows into the fan cover 16 from the air inlet 50. Therefore, the amount of air supplied to the motor fins 22 is increased as compared with the case where the auxiliary intake port 52 is not provided. Thereby, the effect which cools the motor fin 22 increases, and the temperature rise in the motor fin 22 and the motor 12 can be suppressed. That is, the cooling performance can be improved without increasing the fan blades or increasing the number of fan blades, that is, while suppressing the increase of aerodynamic noise and windage loss (power loss).

また、実施の形態に係る回転装置１０によると、各補助吸気口５２は、その全体がファン１４よりも負荷側に位置するよう形成される。別の言い方をすると、各補助吸気口５２は、径方向から見たとき、その全体がファン１４と重複しないよう形成される。これにより、ファン１４によって径方向外側に送り出された空気が補助吸気口５２からファンカバー１６外部に流出しにくくなる。その結果、モータフィン２２に供給される空気の量が減少するのを抑止できる。   Further, according to the rotating device 10 according to the embodiment, each auxiliary intake port 52 is formed so that the entirety thereof is located on the load side with respect to the fan 14. In other words, each auxiliary intake port 52 is formed so as not to overlap with the fan 14 as a whole when viewed from the radial direction. Thus, the air sent out radially outward by the fan 14 is less likely to flow out of the fan cover 16 from the auxiliary intake port 52. As a result, it is possible to prevent the amount of air supplied to the motor fins 22 from decreasing.

また、実施の形態に係る回転装置１０によると、補助吸気口５２は、反負荷側に開口する（すなわち軸方向に開口する）ガイド部材４８によって覆われる。そのため、補助吸気口５２からファンカバー１６内に流入した空気は、軸方向と略平行な方向あるいは軸方向に対して僅かに傾斜した方向に流れる。つまり、筒状部４２や傾斜部４４で軸方向の流れに偏向された吸気口５０からの空気と略平行に流れる。したがって、吸気口５０からの空気と補助吸気口５２からの空気とが合流する際に生じる乱れが小さくなる。   Further, according to the rotating device 10 according to the embodiment, the auxiliary intake port 52 is covered by the guide member 48 that opens to the anti-load side (that is, opens in the axial direction). Therefore, the air that has flowed into the fan cover 16 from the auxiliary intake port 52 flows in a direction substantially parallel to the axial direction or a direction slightly inclined with respect to the axial direction. That is, the air flows substantially in parallel with the air from the air inlet 50 that is deflected in the axial direction by the cylindrical portion 42 and the inclined portion 44. Therefore, the turbulence generated when the air from the intake port 50 and the air from the auxiliary intake port 52 merge is reduced.

また、実施の形態に係る回転装置１０によると、（１）羽根６２の対向傾斜部６４の負荷側端部６６は、ファンカバー１６の傾斜部４４の負荷側端部６８よりも反負荷側に位置する。また、（２）羽根６２の反負荷側端部７０は、吸気口５０の最外端部７２よりも径方向内側まで延在する。本発明者らが行ったシミュレーションによると、羽根６２およびファンカバー１６が、（１）または（２）の少なくとも一方を満たすように構成される場合、ファンカバー１６内に流入する空気の量が増大し、冷却性能が高まることが確認された。   Further, according to the rotating device 10 according to the embodiment, (1) the load side end portion 66 of the opposed inclined portion 64 of the blade 62 is on the side opposite to the load side than the load side end portion 68 of the inclined portion 44 of the fan cover 16. To position. Also, (2) the anti-load side end portion 70 of the blade 62 extends to the radially inner side from the outermost end portion 72 of the intake port 50. According to a simulation performed by the present inventors, when the blades 62 and the fan cover 16 are configured to satisfy at least one of (1) and (2), the amount of air flowing into the fan cover 16 increases. As a result, it was confirmed that the cooling performance was improved.

以上、実施の形態に係る回転装置の構成と動作ついて説明した。この実施の形態は例示であり、その各構成要素の組み合わせにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。   The configuration and operation of the rotating device according to the embodiment have been described above. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective components, and such modifications are also within the scope of the present invention.

（変形例１）
実施の形態では、回転装置１０は、モータ１２と、ファン１４と、ファンカバー１６と、を備える場合について説明したが、これに限られない。回転装置１０は、モータ１２の代わりに、例えば減速機を備えてもよい。この場合、減速機の入力軸の端部にファン１４が固定されてもよい。 (Modification 1)
In the embodiment, a case has been described in which the rotating device 10 includes the motor 12, the fan 14, and the fan cover 16, but the present invention is not limited thereto. The rotating device 10 may include, for example, a speed reducer instead of the motor 12. In this case, the fan 14 may be fixed to the end of the input shaft of the speed reducer.

（変形例２）
実施の形態では、筒状部４２には、周方向に並ぶ複数の補助吸気口５２が設けられる場合について説明したが、これに限られない。筒状部４２には、補助吸気口５２が１つだけ設けられてもよい。また、複数の補助吸気口５２は、周方向に並んでいなくてもよく、例えば各補助吸気口５２の軸方向の位置が異なっていてもよい。 (Modification 2)
In the embodiment, the case where the cylindrical portion 42 is provided with a plurality of auxiliary intake ports 52 arranged in the circumferential direction is described, but the present invention is not limited to this. The cylindrical portion 42 may be provided with only one auxiliary intake port 52. Further, the plurality of auxiliary intake ports 52 may not be arranged in the circumferential direction, and for example, the position of each auxiliary intake port 52 in the axial direction may be different.

（変形例３）
実施の形態では、各補助吸気口５２に対応してガイド部材４８が設けられる場合について説明したが、これに限られない。複数の補助吸気口５２の一部にガイド部材４８が設けられなくてもよい。また、複数の補助吸気口５２の全部にガイド部材４８が設けられなくてもよい。 (Modification 3)
In the embodiment, the case where the guide member 48 is provided corresponding to each auxiliary intake port 52 has been described, but the present invention is not limited to this. The guide member 48 may not be provided in a part of the plurality of auxiliary intake ports 52. Further, the guide member 48 may not be provided in all of the plurality of auxiliary intake ports 52.

（変形例４）
実施の形態では、ガイド部材４８が、傾斜部５４と、平行部５６と、を含む場合について説明したが、これに限られない。ガイド部材４８は、平行部５６を含まず、傾斜部５４だけを含んでもよい。 (Modification 4)
In the embodiment, the case where the guide member 48 includes the inclined portion 54 and the parallel portion 56 has been described. However, the present invention is not limited to this. The guide member 48 may include only the inclined portion 54 without including the parallel portion 56.

（変形例５）
実施の形態では、ガイド部材４８は、径方向から見たとき、筒状部４２と重複しないよう形成される場合について説明したが、これに限られない。例えば、ガイド部材４８の平行部５６が、径方向から見たときに筒状部４２と重複するよう延在してもよい。 (Modification 5)
In the embodiment, the case has been described in which the guide member 48 is formed so as not to overlap with the cylindrical portion 42 when viewed from the radial direction, but is not limited thereto. For example, the parallel part 56 of the guide member 48 may extend so as to overlap the cylindrical part 42 when viewed from the radial direction.

（変形例６）
実施の形態では特に言及しなかったが、ガイド部材４８の傾斜部５４は、平坦な板状に形成され、その断面形状は直線状を有していてもよい。また、ガイド部材４８の傾斜部５４は、湾曲した形状に形成され、その断面形状は曲線状を有していてもよい。 (Modification 6)
Although not specifically mentioned in the embodiment, the inclined portion 54 of the guide member 48 may be formed in a flat plate shape, and the cross-sectional shape thereof may be linear. Further, the inclined portion 54 of the guide member 48 may be formed in a curved shape, and the cross-sectional shape thereof may have a curved shape.

（変形例７）
実施の形態では、径方向から見たとき、補助吸気口５２の全体がファン１４よりも負荷側に位置する場合、すなわち補助吸気口５２がファン１４と重ならない場合について説明したが、これに限られない。径方向から見たとき、補助吸気口５２の一部がファン１４と重なっていてもよい。 (Modification 7)
In the embodiment, the case where the entire auxiliary intake port 52 is located on the load side of the fan 14 when viewed from the radial direction, that is, the case where the auxiliary intake port 52 does not overlap the fan 14 has been described. I can't. When viewed from the radial direction, a part of the auxiliary air inlet 52 may overlap the fan 14.

（変形例８）
実施の形態では、ガイド部材４８が補助吸気口５２の径方向外側を覆うように設けられる場合、すなわちガイド部材４８が補助吸気口５２の外側に設けられる場合について説明したが、これに限られない。ガイド部材４８は、補助吸気口５２の内側に設けられてもよい。図４は、実施の形態の変形例に係る回転装置１０のファン１４およびファンカバー１６の周辺を拡大して示す拡大断面図である。ガイド部材４８は、補助吸気口５２の内側に設けられる。ガイド部材４８は、傾斜部５４と、平行部５６と、を含む。なお、ガイド部材４８は、変形例４と同様、平行部５６を含まず、傾斜部５４だけを含んでもよい。傾斜部５４は、反負荷側から負荷側に行くにしたがってモータ軸１８に近づくようにモータ軸１８に対して傾斜する。傾斜部５４の反負荷側端部は筒状部４２に結合される。平行部５６は、傾斜部５４の負荷側に連続し、筒状部４２と平行に延在するよう形成される。本変形例では、ガイド部材４８は、径方向から見たとき、筒状部４２と重複しないよう形成される。なお、ガイド部材４８は、径方向から見たとき、その平行部５６が筒状部４２と重複するよう形成されてもよい。 (Modification 8)
In the embodiment, the case where the guide member 48 is provided so as to cover the outer side in the radial direction of the auxiliary intake port 52, that is, the case where the guide member 48 is provided outside the auxiliary intake port 52 has been described. . The guide member 48 may be provided inside the auxiliary intake port 52. FIG. 4 is an enlarged cross-sectional view showing the periphery of the fan 14 and the fan cover 16 of the rotating device 10 according to a modification of the embodiment. The guide member 48 is provided inside the auxiliary intake port 52. The guide member 48 includes an inclined portion 54 and a parallel portion 56. Note that the guide member 48 may include only the inclined portion 54 without including the parallel portion 56 as in the fourth modification. The inclination part 54 inclines with respect to the motor shaft 18 so that it may approach the motor shaft 18 as it goes to the load side from the anti-load side. The opposite end portion of the inclined portion 54 is coupled to the cylindrical portion 42. The parallel portion 56 is formed so as to be continuous with the load side of the inclined portion 54 and to extend in parallel with the tubular portion 42. In this modification, the guide member 48 is formed so as not to overlap the cylindrical portion 42 when viewed from the radial direction. The guide member 48 may be formed so that the parallel portion 56 overlaps the cylindrical portion 42 when viewed from the radial direction.

上述した実施の形態および変形例の任意の組み合わせもまた本発明の実施の形態として有用である。組み合わせによって生じる新たな実施の形態は、組み合わされる実施の形態および変形例それぞれの効果をあわせもつ。   Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. The new embodiment generated by the combination has the effects of the combined embodiment and the modified examples.

１０ 回転装置、 １２ モータ、 １４ ファン、 １６ ファンカバー、 １８ モータ軸、 ４２ 筒状部、 ４４ 傾斜部、 ４６ 蓋部、 ５０ 吸気口、 ５２ 補助吸気口。   10 rotating device, 12 motor, 14 fan, 16 fan cover, 18 motor shaft, 42 cylindrical part, 44 inclined part, 46 lid part, 50 air inlet, 52 auxiliary air inlet.

Claims (7)

回転軸と、前記回転軸の反負荷側端部に設けられるファンと、前記ファンを覆うファンカバーと、を備える回転装置であって、
前記ファンカバーは、前記ファンの径方向外側を覆う筒状部と、前記筒状部の反負荷側端部を閉塞する蓋部と、前記蓋部に設けられた吸気口と、を有し、前記筒状部の負荷側端部は回転装置本体側に開口し、
前記ファンカバーは、前記筒状部に補助吸気口を有し、前記補助吸気口は、少なくとも一部が前記ファンよりも負荷側に位置し、
前記ファンカバーは、前記補助吸気口として、少なくとも第１補助吸気口、第２補助吸気口および第３補助吸気口を周方向にこの順に有し、
第１補助吸気口と第２補助吸気口の間の周方向距離が、第２補助吸気口と第３補助吸気口の間の周方向距離よりも短いことを特徴とする回転装置。 A rotating device comprising: a rotating shaft; a fan provided at a non-load side end of the rotating shaft; and a fan cover that covers the fan,
The fan cover includes a cylindrical portion that covers a radially outer side of the fan, a lid portion that closes a non-load side end portion of the cylindrical portion, and an air inlet provided in the lid portion, The load side end of the cylindrical part opens to the rotating device main body side,
The fan cover has an auxiliary air inlet in the tubular portion, and the auxiliary air inlet is at least partially located on the load side of the fan,
The fan cover has at least a first auxiliary intake port, a second auxiliary intake port, and a third auxiliary intake port in this order in the circumferential direction as the auxiliary intake port,
A rotating device characterized in that a circumferential distance between the first auxiliary intake port and the second auxiliary intake port is shorter than a circumferential distance between the second auxiliary intake port and the third auxiliary intake port . 前記ファンカバーは、前記補助吸気口として、少なくとも第１補助吸気口、第２補助吸気口、第３補助吸気口および第４補助吸気口を周方向にこの順に有し、The fan cover has at least a first auxiliary intake port, a second auxiliary intake port, a third auxiliary intake port and a fourth auxiliary intake port in this order in the circumferential direction as the auxiliary intake port,
第３補助吸気口と第４補助吸気口の間の周方向距離が、第２補助吸気口と第３補助吸気口の間の周方向距離よりも短いことを特徴とする請求項１に記載の回転装置。The circumferential distance between the third auxiliary intake port and the fourth auxiliary intake port is shorter than the circumferential distance between the second auxiliary intake port and the third auxiliary intake port. Rotating device. 前記補助吸気口の径方向外側を覆うガイド部材を有し、前記ガイド部材は反負荷側に開口することを特徴とする請求項１または２に記載の回転装置。   3. The rotating device according to claim 1, further comprising a guide member that covers a radially outer side of the auxiliary intake port, wherein the guide member opens to a non-load side. 前記ガイド部材は、反負荷側から負荷側に行くにしたがって、前記筒状部に近づくように傾斜する傾斜部と、前記傾斜部の反負荷側に連続する前記筒状部と平行な平行部と、を有し、
前記ガイド部材は、径方向から見たときに、その全体が前記補助吸気口と重なることを特徴とする請求項３に記載の回転装置。 The guide member has an inclined portion that is inclined so as to approach the cylindrical portion as it goes from the anti-load side to the load side, and a parallel portion that is parallel to the cylindrical portion that is continuous on the anti-load side of the inclined portion. Have
The rotating device according to claim 3, wherein the guide member entirely overlaps the auxiliary intake port when viewed from the radial direction . 複数の前記補助吸気口のうち一部の補助吸気口には前記ガイド部材が設けられていないことを特徴とする請求項３または４に記載の回転装置。5. The rotating device according to claim 3, wherein the guide member is not provided in some of the plurality of auxiliary intake ports. 6. 前記ファンカバーは、前記筒状部と前記蓋部の間に設けられる、前記回転軸に対して傾斜する傾斜部を有し、前記ファンは、前記ファンカバーの前記傾斜部に対向する対向傾斜部を有し、前記対向傾斜部の負荷側端部は、前記ファンカバーの前記傾斜部の負荷側端部よりも反負荷側に位置することを特徴とする請求項１から５のいずれかに記載の回転装置。   The fan cover includes an inclined portion that is provided between the tubular portion and the lid portion and is inclined with respect to the rotation axis, and the fan is an opposed inclined portion that faces the inclined portion of the fan cover. 6. The load-side end portion of the opposed inclined portion is located on the side opposite to the load side than the load-side end portion of the inclined portion of the fan cover. 6. Rotating device. 前記ファンの反負荷側端部は、前記吸気口の最外端部よりも径方向内側まで延在していることを特徴とする請求項１から６のいずれかに記載の回転装置。   7. The rotating device according to claim 1, wherein an end of the fan opposite to the load side extends radially inward from an outermost end of the intake port.
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