JP2005020889A - Rotor of rotating electric machine and enclosed compressor having the same - Google Patents

Rotor of rotating electric machine and enclosed compressor having the same Download PDF

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Publication number
JP2005020889A
JP2005020889A JP2003182314A JP2003182314A JP2005020889A JP 2005020889 A JP2005020889 A JP 2005020889A JP 2003182314 A JP2003182314 A JP 2003182314A JP 2003182314 A JP2003182314 A JP 2003182314A JP 2005020889 A JP2005020889 A JP 2005020889A
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JP
Japan
Prior art keywords
rotor
shaft
electrical machine
rotating electrical
shaft coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003182314A
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Japanese (ja)
Inventor
Takashi Matsuyama
隆 松山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003182314A priority Critical patent/JP2005020889A/en
Publication of JP2005020889A publication Critical patent/JP2005020889A/en
Pending legal-status Critical Current

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  • Applications Or Details Of Rotary Compressors (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Compressor (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor that hardly generates the bend and warp of a shaft and the vibration of the rotor, and to reduce the vibration and noise of an enclosed compressor. <P>SOLUTION: In the rotor of a rotating electric machine, a rotor steel plate 4 forming a part that interference-fits the shaft coupling part 6 of a rotor core 1 coupled to a shaft to an axial diameter, and a rotor steel plate 5 forming a part that clearance-fits the shaft coupling part are alternately formed. By this configuration, the bend and warp of the shaft is hardly generated, and the vibration of the rotor is hardly generated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、密閉型圧縮機を構成し、回転子鉄心のスロットに二次導体を有する回転電機の回転子に係るものである。
【0002】
【従来の技術】
従来、誘導電動機の軸挿入部の全長に渡り回転子内径寸法は、軸外径寸法としまりばめになる単一内径寸法の鉄板の積層となっていたが、この状態では、軸を挿入した時に、挿入抵抗のばらつきが大きく挿入後の軸が曲がる現象が発生する問題があった。
【0003】
これを防止するのに従来の回転子は、図3に示すような軸挿入全長の出入り口部の一部を軸外径に対して、全域においてしばりばめとなる軸結合部の両端、すなわち回転子鉄心両端面側の回転子鉄心の内径寸法を軸外径に対して大きくなるようにし、回転子鉄心を形成していた(例えば、特許文献1参照。)。
【0004】
【特許文献1】
特開平11−89153号公報
【0005】
【発明が解決しようとする課題】
しかしながら、上記従来の構成においては、回転子の内径寸法が軸結合部の全域において軸としまりばめとなるように形成されているため、軸を挿入する際の回転子内径部の変形量が何かの原因で増大した場合、しまりばめ部が連続的に続くため、変形量が増大する部分が拡大することで挿入荷重の不均一が発生し、軸の曲がりを抑えることが困難であった。
【0006】
また、上記構成のように軸結合部を積厚の一部の連続した部分とすると、回転子の軸との非結合部で、回転子の振れが発生することがあった。
【0007】
また、このような軸の曲がりが発生した回転子を密閉型圧縮機に搭載した場合、振動、騒音が大きくなり、回転子と固定子間の空隙が不均一となり効率の低下につながっていた。さらに振れが大きくなった場合、回転子が固定子に接触することもあった。
【0008】
さらに、このような課題に対応するために、軸結合部の両端のすきまばめとなる部分の深さを大きくすると、回転子と軸を結合する支点と回転子を回転自在に保持する軸受までの距離が長くなり、反軸挿入側で回転子が磁気吸引力で振れ、振動、騒音の原因となっていた。
【0009】
そして、このことは特に回転子を片持支持構造の軸と結合の場合、軸のたわみ量が大きくなり、具体的には、片持支持の場合に上述のように軸の出入り口部(特に、入り口部。図3参照。)の一部に、軸外径に対してすきまばめとなる部分を設けるとこれに相当する分、回転子と軸を結合する支点が軸受から離れることとなり、より軸がたわみ易くなった。
【0010】
本発明は、上記従来の課題を解決するもので、軸の曲がり、たわみおよび回転子の振れが発生し難い回転子を提供するとともに、密閉型圧縮機における振動、騒音を低減することを目的とする。
【0011】
【課題を解決するための手段】
本発明は上記従来の課題に鑑みなされたものであり、軸と結合される回転子鉄心の軸結合部を前記軸外径に対してしまりばめとなる部分とすきまばめとなる部分が交互に形成していることを特徴とする回転電機の回転子としたものである。これにより、軸の曲がりおよびたわみが発生し難く、回転子の振れも発生し難くすることができる。
【0012】
【発明の実施の形態】
本願の請求項1に係る発明は、回転子鉄板を積層した回転子鉄心と、前記回転子鉄心のスロットに二次導体を有する回転電機の回転子において、前記回転子内径の軸結合部は、前記軸外径に対してしまりばめとなる部分とすきまばめとなる部分が交互に形成されていることを特徴とする回転電機の回転子であり、何かの原因で回転子内周のある位置で変形量が増大した場合においても、しまりばめ内径部で増大した変形量をすきまばめ内径部で吸収することが可能で、均一な挿入力で軸を挿入できる。
【0013】
請求項2に係る発明は、軸結合部が回転子鉄心の積厚高さの60%以上であることを特徴とする請求項1に記載の回転電機の回転子であり、軸の挿入荷重を抑えつつ、軸のたわみに関係する荷重を分散することが可能で、軸のたわみ量を抑えることができる。また、回転子と軸との連続した非結合部が少なくなることで、回転子の振れを抑えることができる。
【0014】
請求項3に係る発明は、請求項1または請求項2に記載の回転電機の回転子を、軸受を介して回転自在に保持していることを特徴とする密閉型圧縮機であり、回転子の振れ等を低減することができる。
【0015】
請求項4に係る発明は、回転子がに結合される軸が片持支持構造であることを特徴とする請求項3に記載の密閉型電動圧縮機であり、軸受けからの支点を長くすることなく回転子を配置することができる。
【0016】
【実施例】
以下、本発明の実施例について図面を参照して説明する。なお、本発明は当該実施例の回転電機の回転子等に限定するものではない。
【0017】
(実施例1)
図1は回転電機の回転子を示す断面図である。
【0018】
回転子鉄板を積層した回転子鉄心1と回転子鉄心スロット2にダイカストされたアルミまたはアルミ合金からなる回転電機の回転子であって、軸(描画せず)が挿入される回転子内径における軸結合部6が、軸外径としまりばめとなる部分の回転子鉄板4およびすきまばめになる部分の回転子鉄板5を1枚置きに交互に有した構成となっている。
【0019】
これにより、しまりばめ内径部4で増大した変形量をすきまばめ内径部5で吸収することができ、均一な挿入力で軸を挿入でき、軸の曲がりを抑えることができる。
【0020】
また、軸結合部6を回転子の積厚の60%以上に渡って設けることで、軸の挿入荷重を抑えつつ、軸のたわみに関係する荷重を分散することが可能で、軸のたわみ量を抑えることができる。
【0021】
また、回転子と軸との連続した非結合部7が少なくなることで、回転子を回転自在に保持する軸受からの距離が短くなり、回転子の振れを抑えることができる。
【0022】
(実施例2)
図2は上記実施例1とは異なる回転電機の回転子を示す断面図である。
【0023】
実施例1との相違点は、軸結合部6が、軸外径としまりばめになる部分の回転子鉄板4およびすきまばめになる部分の回転子鉄板5を2枚毎に交互に有している点である。なお、かかる場合、3枚以上の複数枚毎に交互構成した場合においても同様である。さらに、一率枚数毎にする必要もない。
【0024】
(実施例3)
図3は、さらに上記実施例とは異なる回転電機の回転子を示す断面図である。
【0025】
軸が挿入される回転子内径が、軸外径としまりばめになる部分の回転子鉄板4を1枚、およびすきまばめになる寸法の回転子鉄板5を2枚づつ、交互に有した構成としている。
【0026】
なお、全積厚に対する軸結合部6の比率が60%以上であれば、軸結合部の構成は上記いずれの場合であっても、さらにはこれらを相互に組み合せた構成であってもよい。
【0027】
(実施例4)
図4は、本発明の一実施例における回転子を搭載した密閉型電動圧縮機を示す断面図である。
【0028】
軸が挿入される回転子内径における軸結合部6が、軸外径としまりばめになるの回転子鉄板4およびすきまばめになるの回転子鉄板5を1枚置きに交互に形成され、回転子1は軸結合部6に挿入された軸8に結合されている。
【0029】
また、回転子1が、密閉型電動圧縮機10の片側に配置された軸受9を介して回転自在に保持されている。
【0030】
なお、回転子1において非結合部7は回転子鉄心の軸受側にのみ形成する構成となっている。
【0031】
これにより、しまりばめ内径部4で増大した変形量をすきまばめ内径部5で吸収することができ、均一な挿入力で軸を挿入でき、軸の曲がりを抑えることができる。
【0032】
また、軸結合部6を回転子の積厚の60%以上に渡って設けることで、軸の挿入荷重を抑えつつ、軸のたわみに関係する荷重を分散することができ、軸のたわみ量を抑えることができる。
【0033】
さらに、回転子と軸との連続した非結合部7が少なくなることで、回転子の振れを抑えることができる。
【0034】
【発明の効果】
以上のように、本願請求項1に係る発明によれば、しまりばめとなる部分で増大した変形量をすきまばめとなる部分で吸収することが可能で、均一な挿入力で軸を挿入でき、軸の曲がりを抑えることができる。
【0035】
また、回転子と軸との連続した非結合部が少なくなることで、回転子を回転自在に保持する軸受からの距離が短くなり、回転子の振れを抑えることができる。
【0036】
請求項2に係る発明によれば、軸結合部を回転子の全積厚の60%以上に渡って設けることで、軸の挿入荷重を抑えつつ、軸のたわみに関係する荷重を分散することが可能で、軸のたわみ量を抑えることができる。
【0037】
請求項3および請求項4に係る発明によれば、低振動、騒音で効率低下を起こさない密閉型圧縮機とすることができる。そして、当該有利な効果は特に回転子が片持支持構造の場合、より顕著なものとなる。
【図面の簡単な説明】
【図1】本発明の実施例1における回転電機の回転子を示す断面図
【図2】本発明の実施例2における回転電機の回転子を示す断面図
【図3】本発明の実施例3における回転電機の回転子を示す断面図
【図4】本発明の実施例4における密閉型電動圧縮機を示す断面図
【図5】従来の回転電機の回転子を示す断面図
【符号の説明】
1 回転子鉄心
2 スロット
3 エンドリング
4 しまりばめとなる部分を形成する回転子鉄板
5 すきまばめとなる部分を形成する回転子鉄板
6 軸結合部
7 非結合部
8 軸
9 軸受け
10 密閉型電動圧縮機
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotor of a rotating electrical machine that constitutes a hermetic compressor and has a secondary conductor in a slot of a rotor core.
[0002]
[Prior art]
Conventionally, the inner diameter of the rotor over the entire length of the shaft insertion portion of the induction motor has been a stack of iron plates with a single inner diameter that fits with the outer diameter of the shaft, but in this state, the shaft was inserted. At times, there is a problem that a variation in insertion resistance is large and the axis after insertion is bent.
[0003]
In order to prevent this, the conventional rotor has a part of the entrance / exit part of the entire shaft insertion length as shown in FIG. The rotor core was formed by making the inner diameter dimension of the rotor core on both end faces of the core larger than the outer diameter of the rotor core (for example, refer to Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-89153
[Problems to be solved by the invention]
However, in the above-described conventional configuration, the inner diameter dimension of the rotor is formed so as to be an interference fit with the shaft in the entire region of the shaft coupling portion, so that the deformation amount of the rotor inner diameter portion when inserting the shaft is small. If it increases for some reason, the interference fit will continue, and the part where the deformation will increase will expand, resulting in uneven insertion load, making it difficult to suppress the bending of the shaft. It was.
[0006]
Further, when the shaft coupling portion is a part of the continuous thickness as in the above-described configuration, the rotor may be shaken at the non-coupling portion with the rotor shaft.
[0007]
In addition, when a rotor with such a bent shaft is mounted on a hermetic compressor, vibration and noise increase, and the gap between the rotor and the stator becomes uneven, leading to a reduction in efficiency. Further, when the runout increased, the rotor might come into contact with the stator.
[0008]
Furthermore, in order to cope with such a problem, if the depth of the portion that becomes a clearance fit at both ends of the shaft coupling portion is increased, the fulcrum for coupling the rotor and the shaft and the bearing that rotatably holds the rotor can be obtained. As a result, the rotor is shaken by the magnetic attractive force on the side opposite to the shaft insertion side, causing vibration and noise.
[0009]
This is particularly true when the rotor is coupled to the shaft of the cantilever support structure, and the amount of deflection of the shaft increases. Specifically, in the case of cantilever support, the shaft entrance / exit portion (particularly, If a part that is a clearance fit with respect to the outer diameter of the shaft is provided in a part of the entrance portion (see Fig. 3), the fulcrum that connects the rotor and the shaft will be separated from the bearing by the corresponding amount. The axis became easier to bend.
[0010]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and provides a rotor that is less likely to bend, bend, and run out of the rotor, and to reduce vibration and noise in a hermetic compressor. To do.
[0011]
[Means for Solving the Problems]
The present invention has been made in view of the above-described conventional problems, and the portion of the rotor core coupled to the shaft that is an interference fit with respect to the outer diameter of the shaft is alternately the portion that is a clearance fit. The rotor of the rotating electrical machine is characterized in that it is formed as follows. As a result, bending and deflection of the shaft are unlikely to occur, and it is also possible to prevent occurrence of rotor shake.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present application is the rotor core in which the rotor iron plate is laminated and the rotor of the rotating electric machine having a secondary conductor in the slot of the rotor core, the shaft coupling portion of the rotor inner diameter is: The rotor of the rotating electrical machine is characterized in that an interference fit portion and a clearance fit portion are alternately formed with respect to the outer diameter of the shaft. Even when the amount of deformation increases at a certain position, the amount of deformation increased at the tight fit inner diameter portion can be absorbed by the clearance fit inner diameter portion, and the shaft can be inserted with a uniform insertion force.
[0013]
The invention according to claim 2 is the rotor of the rotating electrical machine according to claim 1, characterized in that the shaft coupling portion is 60% or more of the stacked thickness of the rotor core. While suppressing, it is possible to disperse the load related to the deflection of the shaft, and the amount of deflection of the shaft can be suppressed. Further, since the number of continuous non-bonded portions between the rotor and the shaft is reduced, it is possible to suppress the shake of the rotor.
[0014]
The invention according to claim 3 is a hermetic compressor characterized in that the rotor of the rotating electrical machine according to claim 1 or 2 is rotatably held via a bearing, and the rotor And the like can be reduced.
[0015]
The invention according to claim 4 is the hermetic electric compressor according to claim 3, wherein the shaft to which the rotor is coupled is a cantilever support structure, and the fulcrum from the bearing is lengthened. Without the rotor can be arranged.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to the rotor etc. of the rotary electric machine of the said Example.
[0017]
(Example 1)
FIG. 1 is a cross-sectional view showing a rotor of a rotating electrical machine.
[0018]
A rotor of a rotating electrical machine made of aluminum or aluminum alloy die-cast in a rotor core 1 and a rotor core slot 2 in which rotor iron plates are stacked, and a shaft at an inner diameter of the rotor into which a shaft (not drawn) is inserted The coupling portion 6 has a configuration in which the rotor iron plate 4 that is a portion that is an interference fit and an outer diameter of the shaft and the rotor iron plate 5 that is a portion that is a clearance fit are alternately provided.
[0019]
As a result, the amount of deformation increased by the interference fit inner diameter portion 4 can be absorbed by the clearance fit inner diameter portion 5, the shaft can be inserted with a uniform insertion force, and the bending of the shaft can be suppressed.
[0020]
Further, by providing the shaft coupling portion 6 over 60% of the rotor thickness, it is possible to disperse the load related to the shaft deflection while suppressing the shaft insertion load, and the amount of shaft deflection. Can be suppressed.
[0021]
Moreover, since the non-joining part 7 where the rotor and the shaft are continuous is reduced, the distance from the bearing that rotatably holds the rotor is shortened, and the swing of the rotor can be suppressed.
[0022]
(Example 2)
FIG. 2 is a cross-sectional view showing a rotor of a rotating electrical machine different from the first embodiment.
[0023]
The difference from the first embodiment is that the shaft coupling portion 6 has an outer diameter of the shaft and a portion of the rotor iron plate 4 that becomes a fit and a portion of the rotor iron plate 5 that becomes a clearance fit alternately. This is the point. In such a case, the same applies to the case where three or more sheets are alternately arranged. Further, it is not necessary to make every one sheet.
[0024]
Example 3
FIG. 3 is a cross-sectional view showing a rotor of a rotating electrical machine different from the above embodiment.
[0025]
The inner diameter of the rotor into which the shaft is inserted has alternately one rotor iron plate 4 that fits into the outer diameter of the shaft and two rotor iron plates 5 that have a size that fits into the clearance. It is configured.
[0026]
In addition, as long as the ratio of the shaft coupling portion 6 to the total product thickness is 60% or more, the configuration of the shaft coupling portion may be any of the above cases, or may be a configuration in which these are combined with each other.
[0027]
(Example 4)
FIG. 4 is a sectional view showing a hermetic electric compressor equipped with a rotor in one embodiment of the present invention.
[0028]
The shaft coupling portion 6 at the inner diameter of the rotor into which the shaft is inserted is alternately formed with every other rotor iron plate 4 that becomes an interference fit with the outer diameter of the shaft and every other rotor iron plate 5 that becomes a clearance fit. The rotor 1 is coupled to a shaft 8 inserted into the shaft coupling portion 6.
[0029]
Further, the rotor 1 is rotatably held via a bearing 9 disposed on one side of the hermetic electric compressor 10.
[0030]
In the rotor 1, the uncoupled portion 7 is formed only on the bearing side of the rotor core.
[0031]
As a result, the amount of deformation increased by the interference fit inner diameter portion 4 can be absorbed by the clearance fit inner diameter portion 5, the shaft can be inserted with a uniform insertion force, and the bending of the shaft can be suppressed.
[0032]
Also, by providing the shaft coupling portion 6 over 60% of the rotor thickness, the load related to the shaft deflection can be dispersed while suppressing the shaft insertion load, and the shaft deflection amount can be reduced. Can be suppressed.
[0033]
Furthermore, since the continuous non-coupled portion 7 between the rotor and the shaft is reduced, the shake of the rotor can be suppressed.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is possible to absorb the increased amount of deformation in the portion that is an interference fit in the portion that is a clearance fit, and insert the shaft with a uniform insertion force. It is possible to suppress the bending of the shaft.
[0035]
Further, since the number of continuous non-bonded portions between the rotor and the shaft is reduced, the distance from the bearing that rotatably holds the rotor is shortened, and the swing of the rotor can be suppressed.
[0036]
According to the second aspect of the present invention, by providing the shaft coupling portion over 60% of the total thickness of the rotor, the load related to the shaft deflection is dispersed while suppressing the shaft insertion load. It is possible to suppress the amount of deflection of the shaft.
[0037]
According to the invention which concerns on Claim 3 and Claim 4, it can be set as the hermetic type compressor which does not raise | generate efficiency reduction with low vibration and noise. The advantageous effect becomes more remarkable especially when the rotor has a cantilever support structure.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a rotor of a rotating electrical machine in Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view showing a rotor of a rotating electrical machine in Embodiment 2 of the present invention. FIG. 4 is a sectional view showing a hermetic electric compressor in Embodiment 4 of the present invention. FIG. 5 is a sectional view showing a rotor of a conventional rotating electric machine.
DESCRIPTION OF SYMBOLS 1 Rotor core 2 Slot 3 End ring 4 Rotor iron plate 5 which forms the part used as an interference fit Rotor iron plate 6 which forms the part used as a clearance fit 6 Shaft coupling part 7 Non-coupling part 8 Shaft 9 Bearing 10 Sealing type Electric compressor

Claims (4)

回転子鉄板を積層した回転子鉄心と、前記回転子鉄心のスロットに二次導体を有する回転電機の回転子において、前記回転子内径の軸結合部は、前記軸外径に対してしまりばめとなる部分とすきまばめとなる部分が交互に形成されていることを特徴とする回転電機の回転子。In a rotor of a rotating electrical machine having a rotor core in which rotor iron plates are stacked and a secondary conductor in a slot of the rotor core, the shaft coupling portion of the rotor inner diameter is an interference fit with respect to the outer diameter of the shaft. The rotor of the rotating electrical machine is characterized in that the portion to be a gap and the portion to be a clearance fit are alternately formed. 軸結合部が回転子鉄心の積厚高さの60%以上であることを特徴とする請求項1に記載の回転電機の回転子。The rotor of the rotating electrical machine according to claim 1, wherein the shaft coupling portion is 60% or more of the stacked thickness of the rotor core. 請求項1または請求項2に記載の回転電機の回転子を、軸受を介して回転自在に保持していることを特徴とする密閉型圧縮機。A hermetic compressor, wherein the rotor of the rotating electrical machine according to claim 1 or 2 is rotatably held via a bearing. 回転子がに結合される軸が片持支持構造であることを特徴とする請求項3に記載の密閉型電動圧縮機。4. The hermetic electric compressor according to claim 3, wherein the shaft to which the rotor is coupled has a cantilever support structure.
JP2003182314A 2003-06-26 2003-06-26 Rotor of rotating electric machine and enclosed compressor having the same Pending JP2005020889A (en)

Priority Applications (1)

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Publications (1)

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JP2005020889A true JP2005020889A (en) 2005-01-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009060738A (en) * 2007-08-31 2009-03-19 Honda Motor Co Ltd Rotating electrical machine
CN104097025A (en) * 2013-04-07 2014-10-15 吴为国 Manufacturing method for fan blades of Roots blower, Roots blower and aeration and oxygenation device
EP3896825A1 (en) * 2020-04-13 2021-10-20 Mitsuba Corporation Motor device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009060738A (en) * 2007-08-31 2009-03-19 Honda Motor Co Ltd Rotating electrical machine
CN104097025A (en) * 2013-04-07 2014-10-15 吴为国 Manufacturing method for fan blades of Roots blower, Roots blower and aeration and oxygenation device
EP3896825A1 (en) * 2020-04-13 2021-10-20 Mitsuba Corporation Motor device
JP7436273B2 (en) 2020-04-13 2024-02-21 株式会社ミツバ motor device

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