JP2012215099A - Impeller and centrifugal fan - Google Patents

Impeller and centrifugal fan Download PDF

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JP2012215099A
JP2012215099A JP2011080168A JP2011080168A JP2012215099A JP 2012215099 A JP2012215099 A JP 2012215099A JP 2011080168 A JP2011080168 A JP 2011080168A JP 2011080168 A JP2011080168 A JP 2011080168A JP 2012215099 A JP2012215099 A JP 2012215099A
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Prior art keywords
impeller
resin
flange
annular portion
hub
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Manabu Fuchibe
学 渕辺
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Minebea Motor Manufacturing Corp
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Minebea Motor Manufacturing Corp
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Priority to JP2011080168A priority Critical patent/JP2012215099A/en
Priority to US13/423,912 priority patent/US20120251321A1/en
Priority to DE201210102626 priority patent/DE102012102626A1/en
Publication of JP2012215099A publication Critical patent/JP2012215099A/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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an impeller which can meet the requirements of environmental resistance such as strict heat resistance and shock resistance, while enabling cost reduction and weight saving to the degree equal to or greater than those of the conventional configurations, and to provide a centrifugal fan including the impeller.SOLUTION: The impeller includes: a cup-shaped metallic hub 13 which has a cylindrical portion 14 and includes a flange 18 extending in the outer peripheral direction from the edge of the cup; a plurality of resin-made vanes 11 disposed at the outer peripheral positions of the flange 18 around a rotary shaft of the cylindrical portion 14; and a resin-made annular part 17 which supports the plurality of resin-made vanes 11, in which the flange 18 is embedded and which holds the embedded flange. The centrifugal fan including the impeller is also provided.

Description

本発明は、ファンモータなどの流体機器の回転部品として使用されるインペラに関する。   The present invention relates to an impeller used as a rotating part of a fluid device such as a fan motor.

従来、インペラを使用するファンモータには、適用される状況に合わせて多くの構成が提供されている。例えば、技術文献１の遠心ファンはアウターロータ型であり、回転によりエアの流れを発生させるインペラ部が、複数の主翼とその内周に一体に配置された複数の補助翼とを備える。インペラ部の回転中心部では、カップ部が配置されて、その外側面に補助翼が接続される。カップ部の外側は樹脂による略有底円筒状の外側カップ部となっており、インペラ部全体と一体的に成型され、金属製のヨーク部材が磁束の収束という一義的目的のため圧入固定される。   Conventionally, many configurations have been provided for fan motors that use an impeller in accordance with the application situation. For example, the centrifugal fan of Technical Document 1 is an outer rotor type, and an impeller portion that generates an air flow by rotation includes a plurality of main wings and a plurality of auxiliary wings integrally disposed on the inner periphery thereof. A cup portion is arranged at the rotation center portion of the impeller portion, and an auxiliary wing is connected to the outer surface thereof. The outside of the cup portion is a substantially bottomed cylindrical outer cup portion made of resin, and is molded integrally with the entire impeller portion, and the metal yoke member is press-fitted and fixed for the primary purpose of converging the magnetic flux. .

また、技術文献２の送風機用羽根車では、円筒形状のハブの周囲に複数の翼型羽根を備えている。これらのハブと翼型羽根は樹脂による一体成型となっており、ハブ中心部には金属製のヨークは配置されない。   In addition, the blower impeller of Technical Document 2 includes a plurality of wing blades around a cylindrical hub. These hubs and wing blades are integrally formed of resin, and no metal yoke is disposed at the center of the hub.

特開２００７−１２０３７８号公報JP 2007-120378 A 特開２００５−５４６９２号公報JP 2005-54692 A

ところで、インペラを使用するファンモータなどは適用される環境が多岐に渡り、耐熱性についても、氷点下〜１００℃以上（具体的例としては、−４０℃〜１２５℃）の幅広い耐熱性能を求められる場合がある。
上記特許文献１においては、外側カップ部が樹脂材料で、この外側カップ部に圧入されているヨーク部は金属なので、両者の熱膨張係数が異なり、ヒートショックにより外側カップ部に亀裂が生じてしまうという問題があった。 By the way, fan motors using an impeller are used in a wide variety of environments, and the heat resistance is also required to have a wide range of heat resistance from below freezing to 100 ° C. or higher (as a specific example, −40 ° C. to 125 ° C.). There is a case.
In Patent Document 1, since the outer cup portion is made of a resin material and the yoke portion press-fitted into the outer cup portion is a metal, the thermal expansion coefficients of the two are different, and the outer cup portion cracks due to heat shock. There was a problem.

また、上記特許文献２においては、羽根車全体が熱可塑性エラストマーを混入した樹脂を使用してはいるが、上記のような条件の幅広い温度範囲ではヒートショックによる亀裂を防止できないという問題があった。   Moreover, in the said patent document 2, although the resin which mixed the thermoplastic elastomer was used for the whole impeller, there existed a problem that the crack by heat shock could not be prevented in the wide temperature range of the above conditions. .

従って、本発明は、従来構成よりも同等若しくはそれ以上の軽量化及びコスト低減を可能としつつ、厳しい耐熱性能や耐ショック性などの環境性能の要求に対応可能であるインペラを提供することを目的とする。   Accordingly, an object of the present invention is to provide an impeller that can meet the demands of environmental performance such as severe heat resistance and shock resistance while enabling weight reduction and cost reduction equal to or higher than those of conventional configurations. And

本発明のインペラは、円筒部を有するカップ形状であって該カップ縁部分から外周方向に延出するフランジを備える金属製ハブと、前記円筒部の回転軸を軸中心として前記フランジの外周位置に配置される複数の樹脂製羽根と、前記複数の樹脂製羽根を支持するとともに、前記フランジが埋め込まれて該フランジを保持する樹脂製環状部とを備える構成である。   The impeller of the present invention has a cup shape having a cylindrical portion and a metal hub provided with a flange extending in the outer peripheral direction from the cup edge portion, and an outer peripheral position of the flange with the rotation axis of the cylindrical portion as an axial center. The structure includes a plurality of resin blades to be arranged, and a resin annular portion that supports the plurality of resin blades and is embedded with the flange to hold the flange.

前記インペラは、前記樹脂製羽根と前記樹脂製環状部がエラストマー材を混入された樹脂よりなる構成が好ましい。   The impeller preferably has a configuration in which the resin blade and the resin annular portion are made of a resin mixed with an elastomer material.

前記インペラは、前記フランジの少なくとも前記樹脂製環状部内へ埋め込まれている部分が、前記円筒部回転軸に対して垂直以外の形状を有する構成が好ましい。   The impeller preferably has a configuration in which at least a portion of the flange embedded in the annular portion made of resin has a shape other than perpendicular to the rotation axis of the cylindrical portion.

前記インペラは、前記樹脂製羽根と前記樹脂製環状部がガラス繊維を混入された樹脂よりなる構成が好ましい。   The impeller preferably has a configuration in which the resin blades and the resin annular portion are made of resin mixed with glass fibers.

前記インペラと、前記インペラを回転させるモータ部とを備える構成の遠心ファンを提供することが好ましい。   It is preferable to provide a centrifugal fan configured to include the impeller and a motor unit that rotates the impeller.

以上の構成によれば、ハブ部分がすべて金属製となり、樹脂と金属との接合部分がフランジのみの構成となるので、熱膨張係数の違いが影響する範囲を小さくすることができ、幅広い温度範囲の使用条件でもヒートショックによる亀裂の発生を抑制することができる。更に、ハブ部分の樹脂がないので、従来に比べてハブ部分の軽量化を図ることかでき、原材料コスト的にも有利となる。   According to the above configuration, the hub portion is all made of metal, and the joint portion between the resin and metal is only a flange, so the range affected by the difference in thermal expansion coefficient can be reduced, and a wide temperature range The occurrence of cracks due to heat shock can be suppressed even under the use conditions. Furthermore, since there is no resin in the hub portion, the hub portion can be reduced in weight compared to the conventional case, which is advantageous in terms of raw material costs.

更には、羽根と環状部の樹脂材料にエラストマー材を混入することで、樹脂材料に弾力性を与えて、ヒートショックによる亀裂発生の抑制効果を増すことができる。   Further, by mixing the elastomer material into the resin material of the blade and the annular portion, the resin material can be given elasticity, and the effect of suppressing the occurrence of cracks due to heat shock can be increased.

羽根と環状部の樹脂材料にガラス繊維を混入することで、ヒートショックによる亀裂発生の抑制効果を得るとともに、耐ショック性を増すことができる。   By mixing glass fibers into the resin material of the blades and the annular portion, it is possible to obtain an effect of suppressing the occurrence of cracks due to heat shock and to increase shock resistance.

本発明によれば、高温環境下でもヒートショックによる亀裂の発生を抑制しつつ耐ショック性の向上を図り、更に、ハブ部分の軽量化と共に原材料コスト的にも有利であるインペラを提供することが可能となる。   According to the present invention, it is possible to improve shock resistance while suppressing the occurrence of cracks due to heat shock even in a high temperature environment, and further to provide an impeller that is advantageous in terms of raw material costs as well as weight reduction of the hub portion. It becomes possible.

本発明の実施形態に係わるインペラの斜視図である。It is a perspective view of the impeller concerning the embodiment of the present invention. 図１に示したインペラの正面図である。It is a front view of the impeller shown in FIG. 図２に示したインペラのＡ−Ａ線断面の矢視図である。FIG. 3 is a cross-sectional view of the impeller shown in FIG. 本発明の実施形態に係わるインペラのフランジの他の形状を示す部分断面図である。It is a fragmentary sectional view which shows the other shape of the flange of the impeller concerning embodiment of this invention. 本発明に係わるインペラを採用した遠心ファンの一実施形態であるブロアーの上面図である。It is a top view of the blower which is one Embodiment of the centrifugal fan which employ | adopted the impeller concerning this invention. 図５のＢ−Ｂ線の断面図である。It is sectional drawing of the BB line of FIG.

以下、本発明に係わるインペラの好ましい実施形態について、図面を参照しながら説明する。
図１は、本発明に係わるインペラの斜視図、図２は、図１のインペラの正面図である。図３は、図２に示したインペラのＡ−Ａ線断面の矢視図である。 Hereinafter, preferred embodiments of an impeller according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an impeller according to the present invention, and FIG. 2 is a front view of the impeller of FIG. FIG. 3 is a cross-sectional view taken along line AA of the impeller shown in FIG.

本実施形態のインペラ１０は、樹脂製の羽根１１と、カップ形状の金属製のハブ１３と、樹脂製の上側環状部１５と、樹脂製の下側環状部１７とにより構成されている。
金属製のハブ１３は、図３に示すように円筒部１４を備えるカップ形状であって、カップ形状の縁部１６から円筒部１４の外周方向にフランジ１８が延出している。ハブ１３の回転軸中心にはシャフト２１がボス２２により固定されている。 The impeller 10 of the present embodiment includes a resin blade 11, a cup-shaped metal hub 13, a resin upper annular portion 15, and a resin lower annular portion 17.
As shown in FIG. 3, the metal hub 13 has a cup shape including a cylindrical portion 14, and a flange 18 extends from the cup-shaped edge 16 toward the outer periphery of the cylindrical portion 14. A shaft 21 is fixed to the center of the rotation axis of the hub 13 by a boss 22.

複数の樹脂製の羽根１１は、円筒部１４の回転軸（シャフト２１）を軸中心としてフランジ１８の外周位置に配置される。この羽根１１は、等間隔で円周上に配置され、樹脂製の上側環状部１５と下側環状部１７とに挟まれた多翼構造である。これら羽根１１と上側環状部１５と下側環状部１７とは樹脂からなる一体成型体である。   The plurality of resin blades 11 are arranged at the outer peripheral position of the flange 18 with the rotation axis (shaft 21) of the cylindrical portion 14 as the axis center. The blades 11 are arranged on the circumference at equal intervals and have a multiblade structure sandwiched between an upper annular portion 15 and a lower annular portion 17 made of resin. The blades 11, the upper annular portion 15, and the lower annular portion 17 are an integrally molded body made of resin.

下側環状部１７は、一体成型時にフランジ１８の外周部が下側環状部１７に埋まり込む位置で成型される。これにより、フランジ１８と下側環状部１７とが一体となり、ひいては、樹脂製の羽根１１と、カップ形状の金属製のハブ１３と、樹脂製の上側環状部１５と、樹脂製の下側環状部１７とが一体のインペラ１０となる。   The lower annular portion 17 is molded at a position where the outer peripheral portion of the flange 18 is embedded in the lower annular portion 17 during integral molding. As a result, the flange 18 and the lower annular portion 17 are integrated, and as a result, the resin blade 11, the cup-shaped metal hub 13, the resin upper annular portion 15, and the resin lower annular portion. The impeller 10 integrated with the portion 17 is a single unit.

つまり、樹脂材料と金属材料との接合部分は金属製のフランジ１８の外周部のみとなり、ハブ１３の殆どを占めるカップ部には樹脂が無くなるので、亀裂が入るという対象そのものを無くすこととなる。また、熱膨張係数の違いが影響する接合部分はフランジ１８の外周部のみで接合範囲は小さく、高温環境下でもヒートショックの影響を受けにくくなる。更に、カップ部には樹脂が無くなるので、軽量化及び原材料削減にも有利に働く。しかも、ハブ１３は金属製であるので、ヨークとしての役割は変わっていない。   That is, the joint portion between the resin material and the metal material is only the outer peripheral portion of the metal flange 18, and the cup portion occupying most of the hub 13 does not have the resin, thereby eliminating the object of cracking itself. In addition, the joining portion affected by the difference in thermal expansion coefficient is only the outer peripheral portion of the flange 18, and the joining range is small, so that it is difficult to be affected by heat shock even in a high temperature environment. Furthermore, since no resin is used in the cup portion, it is advantageous for weight reduction and raw material reduction. Moreover, since the hub 13 is made of metal, the role as a yoke has not changed.

図３に示すように、フランジ１８の形状は、少なくとも下側環状部１７の内部で、円筒部１４の回転軸であるシャフト２１に対する垂直面から上側環状部１５方向へ傾いた形状である。すなわち、少なくとも下側環状部１７に埋め込まれるフランジ１８の一部と回転軸方向とは９０度よりも小さい角度を成している。この構造により、フランジ１８と下側環状部１７との接合力が向上し、接合範囲を小さくすることができ、高温環境下でも安定した回転を提供できる。   As shown in FIG. 3, the shape of the flange 18 is a shape inclined at least inside the lower annular portion 17 from the vertical plane with respect to the shaft 21 that is the rotation axis of the cylindrical portion 14 toward the upper annular portion 15. That is, at least a part of the flange 18 embedded in the lower annular portion 17 and the rotation axis direction form an angle smaller than 90 degrees. With this structure, the joining force between the flange 18 and the lower annular portion 17 is improved, the joining range can be reduced, and stable rotation can be provided even in a high temperature environment.

インペラ１０に使用される樹脂材料には、エラストマー材を混入させることができる。インペラ１０の本発明の構成とエラストマー材が混入された相乗効果により、インペラ１０に使用される樹脂材料の亀裂の発生が更に抑制される。   An elastomer material can be mixed into the resin material used for the impeller 10. Due to the synergistic effect in which the configuration of the present invention of the impeller 10 and the elastomer material are mixed, the occurrence of cracks in the resin material used in the impeller 10 is further suppressed.

インペラ１０に使用される樹脂材料には、ガラス繊維を混入させることができる。混入量としては、重量％で１５〜４０％の範囲が適応範囲であり、３０％程度が最も好ましい。このガラス繊維を混入させることとインペラ１０の本発明の構成により、インペラ１０の耐ショック性が向上する。この耐ショック性とは、外部から与えられる衝撃（機械的な力）に対する耐性を意味する。更には、インペラ１０に使用される樹脂材料にガラス繊維を混入させることに加えて、エラストマー材を混入することにより、インペラ１０の耐ショック性が向上することに加えて、インペラ１０に使用される樹脂材料の亀裂の発生が更に抑制される。   Glass fibers can be mixed into the resin material used for the impeller 10. As a mixing amount, the range of 15 to 40% by weight is an applicable range, and about 30% is most preferable. By mixing this glass fiber and the configuration of the impeller 10 according to the present invention, the shock resistance of the impeller 10 is improved. This shock resistance means resistance to externally applied impact (mechanical force). Furthermore, in addition to mixing glass fibers into the resin material used for the impeller 10, it is used for the impeller 10 in addition to improving the shock resistance of the impeller 10 by mixing an elastomer material. The occurrence of cracks in the resin material is further suppressed.

図４は、本発明に係わるインペラのフランジの他の形状を示す部分断面図である。
図４に示すように、円筒部５４の縁部５６から延びるフランジ５８の断面形状は波形である。この波形形状によりフランジ５８と下側環状部１７との接合範囲（図４における左右方向）を広げることなく、接合力を更に向上させることができる。
この構成以外にも、ハブに形成されるフランジの形状は、少なくとも下側環状部１７の内部で、回転軸に対する垂直以外の形状とすることで、フランジと下側環状部１７との接合力が向上される。 FIG. 4 is a partial sectional view showing another shape of the flange of the impeller according to the present invention.
As shown in FIG. 4, the cross-sectional shape of the flange 58 extending from the edge portion 56 of the cylindrical portion 54 is a waveform. With this wave shape, the joining force can be further improved without expanding the joining range (the left-right direction in FIG. 4) between the flange 58 and the lower annular portion 17.
In addition to this configuration, the flange formed on the hub has a shape other than perpendicular to the rotation axis at least inside the lower annular portion 17, so that the joining force between the flange and the lower annular portion 17 is increased. Be improved.

図５は、本発明に係わるインペラを採用した遠心ファンの一実施形態であるブロアーの上面図、図６は、図５のＢ−Ｂ線の断面図である。
インペラ４０は、ブロアー３０のケース３３内部に配置される。ケース３３にはブロアー３０の上面に開口する吸引口３８ａと、ブロアー３０の側面に開口する吐出口３８ｂとが備えられている。ケース３３の底面に配置されるベース３５から突設する円筒壁３６の外周にステータアセンブリ３４が固定される。ステータアセンブリ３４はコア３４ａとコイル３４ｂからなる。円筒壁３６の内周には軸受け３７が固定され、軸受け３７にシャフト３１が回転自在に支持される。シャフト３１にはボス３２を介してインペラ４０のカップ形状のハブ４３が保持される。ハブ４３の円筒部にはマグネット３９が固定されている。 FIG. 5 is a top view of a blower as an embodiment of a centrifugal fan employing an impeller according to the present invention, and FIG. 6 is a cross-sectional view taken along the line BB of FIG.
The impeller 40 is disposed inside the case 33 of the blower 30. The case 33 includes a suction port 38 a that opens to the upper surface of the blower 30 and a discharge port 38 b that opens to the side surface of the blower 30. A stator assembly 34 is fixed to the outer periphery of a cylindrical wall 36 protruding from a base 35 disposed on the bottom surface of the case 33. The stator assembly 34 includes a core 34a and a coil 34b. A bearing 37 is fixed to the inner periphery of the cylindrical wall 36, and the shaft 31 is rotatably supported by the bearing 37. A cup-shaped hub 43 of an impeller 40 is held on the shaft 31 via a boss 32. A magnet 39 is fixed to the cylindrical portion of the hub 43.

また、ボス３２と結合しているハブ４３の底部の外径は円筒部の外径よりも小さく、円筒部と底部の間は円錐台形状である。さらに、ハブ４３の高さは羽根の高さよりも低くされている。このような構造により、吸引口３８ａから空気が流れ込みやすくなっている。   In addition, the outer diameter of the bottom portion of the hub 43 coupled to the boss 32 is smaller than the outer diameter of the cylindrical portion, and the space between the cylindrical portion and the bottom portion has a truncated cone shape. Furthermore, the height of the hub 43 is set lower than the height of the blades. With such a structure, air easily flows from the suction port 38a.

羽根４１及びフランジ４８の構成は図１〜図３の羽根１１及びフランジ１８と同様である。すなわち、金属製のハブ４３の円筒部縁部からフランジ４８が延設されている。そして、インペラ４０の一体成型時にフランジ４８の外周部が羽根４１下部位置で樹脂内に埋まり込む位置で成型される。これにより、フランジ４８と羽根４１とが一体となり、ひいては、樹脂製の羽根１１と、カップ形状の金属製のハブ１３とが一体のインペラ４０となる。   The structure of the blade | wing 41 and the flange 48 is the same as that of the blade | wing 11 and the flange 18 of FIGS. 1-3. That is, the flange 48 extends from the edge of the cylindrical portion of the metal hub 43. Then, when the impeller 40 is integrally molded, the outer peripheral portion of the flange 48 is molded at a position where it is embedded in the resin at the lower position of the blade 41. Thereby, the flange 48 and the blade | wing 41 become integral, and by extension, the resin-made blade | wing 11 and the cup-shaped metal hub 13 become the integral impeller 40.

金属製のハブ４３内に取り付けられたマグネット３９は、ステータアセンブリ３４と組み合わされた時、電気モータを形成し、これは、ステータアセンブリ３４内の印刷回路板上の励磁回路（図示せず）に電圧が印加された時、インペラ４０を回転させる。このインペラ４０の回転により、吸引口３８ａからのブロアー３０周辺の吸気と、吐出口３８ｂからの送気が実施される。   A magnet 39 mounted in a metal hub 43 forms an electric motor when combined with the stator assembly 34, which is connected to an excitation circuit (not shown) on a printed circuit board in the stator assembly 34. When a voltage is applied, the impeller 40 is rotated. By the rotation of the impeller 40, intake air around the blower 30 from the suction port 38a and air supply from the discharge port 38b are performed.

この時、ブロアー３０周辺が例えば１００℃といった高温でも、フランジ４８と羽根４１との接合範囲は小さく、エラストマー材の混入、更には、ガラス繊維の混入により、インペラ４０は高温環境下でもヒートショックの影響を受けにくくなっている。   At this time, even if the temperature around the blower 30 is as high as 100 ° C., for example, the joining range between the flange 48 and the blade 41 is small, and the impeller 40 is subjected to heat shock even in a high temperature environment due to the mixing of elastomer material and glass fiber. It is less affected.

なお、フランジ４８には羽根４１とハブ４３の円筒部との間の内周部において一部円周方向にスリット４９が回転バランスを取って備えられている。このスリット４９はブロアー３０内の気体の流れをより活発にし、ステータアセンブリ３４からの廃熱にも寄与する。   The flange 48 is provided with a slit 49 in a partly circumferential direction with a rotational balance in the inner peripheral portion between the blade 41 and the cylindrical portion of the hub 43. The slits 49 make the gas flow in the blower 30 more active and contribute to waste heat from the stator assembly 34.

以上の構成のブロアー３０によれば、例えば−４０℃〜１２５℃といった耐熱要求にも十分に耐えることができ、安定した性能を有するブロアーが提供できる。   According to the blower 30 having the above configuration, for example, a blower that can sufficiently withstand a heat resistance requirement such as −40 ° C. to 125 ° C. and has stable performance can be provided.

ここで、本発明の金属製のハブは、一般的には鉄であるが、磁束をもれなく収束でき、且つ回転部材としての強度を備える材料であれば良い。
また、インペラの羽根形状・種類としては、金属製ヨークが使用される構成のものであれば、適用可能である。 Here, the metal hub of the present invention is generally made of iron, but may be any material that can converge the magnetic flux without any leakage and has strength as a rotating member.
In addition, the impeller blade shape and type are applicable as long as a metal yoke is used.

以上のように、本発明の上記実施形態によれば、インペラのハブ部分がすべて金属製となり、羽根である樹脂と金属との接合部分がハブから延びるフランジの外周部のみの構成なので、熱膨張係数の違いが影響する範囲を小さくでき、幅広い温度変化にさらされてもヒートショックによる亀裂の発生を抑制できる。更に、ハブ部分の樹脂がないので、従来に比べてハブ部分の軽量化を図ることかでき、原材料コスト的にも有利となる。   As described above, according to the above-described embodiment of the present invention, the hub portion of the impeller is made entirely of metal, and the joint portion between the resin, which is a blade, and the metal is composed only of the outer peripheral portion of the flange extending from the hub. The range affected by the difference in coefficients can be reduced, and cracking due to heat shock can be suppressed even when exposed to a wide range of temperature changes. Furthermore, since there is no resin in the hub portion, the hub portion can be reduced in weight compared to the conventional case, which is advantageous in terms of raw material costs.

なお、本発明は上記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良などは本発明に含まれるものである。   It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.

１０，４０ インペラ
３０ ブロアー
１１，４１ 樹脂製羽根部
１３，４３ 金属製ハブ
１４，５４ 円筒部
１６，５６ 縁部
１７ 樹脂製環状部
１８，４８，５８ フランジ 10, 40 Impeller 30 Blower 11, 41 Plastic blade part 13, 43 Metal hub 14, 54 Cylindrical part 16, 56 Edge part 17 Plastic annular part 18, 48, 58 Flange

Claims (5)

円筒部を有するカップ形状であり、該カップ縁部分から外周方向に延出するフランジを備える金属製ハブと、
前記円筒部の回転軸を軸中心として前記フランジの外周位置に配置される複数の樹脂製羽根と、
前記複数の樹脂製羽根を支持するとともに、前記フランジが埋め込まれて該フランジを保持する樹脂製環状部とを備えるインペラ。 A metal hub having a cylindrical shape and having a flange extending in an outer circumferential direction from the cup edge portion;
A plurality of resin blades disposed at the outer peripheral position of the flange around the rotation axis of the cylindrical portion;
An impeller including a resin annular portion that supports the plurality of resin blades and that is embedded with the flange to hold the flange. 前記樹脂製羽根と前記樹脂製環状部がエラストマー材を混入された樹脂よりなる請求項１に記載のインペラ。   The impeller according to claim 1, wherein the resin blade and the resin annular portion are made of a resin mixed with an elastomer material. 前記フランジの少なくとも前記樹脂製環状部内へ埋め込まれている部分が、前記円筒部回転軸に対して垂直以外の形状を有する請求項１又は２のいずれかに記載のインペラ。   3. The impeller according to claim 1, wherein at least a portion of the flange embedded in the resin annular portion has a shape other than perpendicular to the cylindrical portion rotation axis. 前記樹脂製羽根と前記樹脂製環状部がガラス繊維を混入された樹脂よりなる請求項１〜３のいずれか一項に記載のインペラ。   The impeller according to any one of claims 1 to 3, wherein the resin blade and the resin annular portion are made of a resin mixed with glass fiber. 請求項１〜４のいずれか一項に記載のインペラと、前記インペラを回転させるモータ部とを備えた遠心ファン。   The centrifugal fan provided with the impeller as described in any one of Claims 1-4, and the motor part which rotates the said impeller.
JP2011080168A 2011-03-31 2011-03-31 Impeller and centrifugal fan Pending JP2012215099A (en)

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