JP3534432B2 - Hermetic electric compressor - Google Patents
Hermetic electric compressorInfo
- Publication number
- JP3534432B2 JP3534432B2 JP23067493A JP23067493A JP3534432B2 JP 3534432 B2 JP3534432 B2 JP 3534432B2 JP 23067493 A JP23067493 A JP 23067493A JP 23067493 A JP23067493 A JP 23067493A JP 3534432 B2 JP3534432 B2 JP 3534432B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- bearing
- laminated core
- core
- inner diameter
- 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.)
- Expired - Lifetime
Links
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- Compressor (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、密閉形電動圧縮機に係
り、電動機における回転子のコア積層形成方法および回
転子の形状に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor, and more particularly to a method for forming a rotor core lamination in an electric motor and a shape of the rotor.
【０００２】[0002]
【従来の技術】従来技術を図６および図７を参照して説
明する。図６は、従来の密閉形電動圧縮機の電動機部を
示す要部断面図、図７は、他の従来の回転子を示す断面
図である。図６に示す片持軸受密閉形電動圧縮機の電動
機部５０は、クランクシャフト４４、回転子３３、固定
子４５を主要構成要素としている。４３は、クランクシ
ャフト４４の軸受部、３２は回転子積層コア、３２ａは
回転子積層コア反軸受側外径端部、５１は反軸受側回転
子エンドリング部、５２は軸受側回転子エンドリング
部、４１は、回転子積層コア３２の反軸受側端部の凹
部、３９は回転子積層コア３２の軸受側端部の凹部であ
る。2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 6 is a cross-sectional view of an essential part showing an electric motor part of a conventional hermetic electric compressor, and FIG. 7 is a cross-sectional view showing another conventional rotor. The electric motor section 50 of the cantilever bearing closed electric compressor shown in FIG. 6 has the crankshaft 44, the rotor 33, and the stator 45 as main constituent elements. Reference numeral 43 is a bearing portion of the crankshaft 44, 32 is a rotor laminated core, 32a is a rotor laminated core non-bearing side outer diameter end portion, 51 is a non-bearing side rotor end ring portion, and 52 is a bearing side rotor end ring. Reference numeral 41 denotes a concave portion of the rotor laminated core 32 at the end opposite to the bearing side, and 39 denotes a concave portion of the rotor laminated core 32 at the bearing side.
【０００３】この片持軸受密閉形電動圧縮機は、電動機
部５０の駆動により回転子３３が回転し、回転子３３に
焼嵌め、あるいは圧入により固定してあるクランクシャ
フト４４が偏心回転運動を行う。この偏心回転運動によ
ってクランクシャフト４４に固定してある回転子３３が
振れ回り、回転子積層コア反軸受側外径端部３２ａ部が
特に大きく振れ回っていた。In this cantilever bearing closed type electric compressor, the rotor 33 is rotated by driving the electric motor section 50, and the crankshaft 44 fixed by shrink fitting or press fitting into the rotor 33 performs eccentric rotary motion. . Due to this eccentric rotational movement, the rotor 33 fixed to the crankshaft 44 swung around, and the rotor laminated core non-bearing side outer diameter end portion 32a swung around particularly greatly.
【０００４】また、図７に示す回転子の例は、実公平１
−９２６４号公報に記載されているもので、回転子６５
の軸受側内径６２は軸受部（図示せず）が入り込むため
大きく形成され、また、反軸受側内径６３は軸内径６１
とほぼ同じか若干大きく形成されている。また、反軸受
側のエンドリング６７の厚みは軸受側エンドリング６４
より薄く形成されていた。The example of the rotor shown in FIG.
No. 9264, the rotor 65
The inner diameter 62 on the bearing side is formed to be large because a bearing portion (not shown) enters, and the inner diameter 63 on the opposite bearing side is the inner diameter 61 of the shaft.
It is almost the same as or slightly larger than. The thickness of the end ring 67 on the side opposite to the bearing is equal to the thickness of the end ring 64 on the side of the bearing.
It was formed thinner.
【０００５】[0005]
【発明が解決しようとする課題】上記の図６に示す従来
技術では、クランクシャフト４４の偏心回転運動によ
り、回転子鉄心である回転子積層コア反軸受側外径端部
３２ａ部が、固定子４５の固定子鉄心内径に接触すると
いう問題があった。これを防止する方法として、例え
ば、図６の回転子３３の軸受側内径を大きく形成し、軸
受部４３を回転子鉄心内部に入り込む構造としてクラン
クシャフト４４の偏心回転運動により前記回転子積層コ
ア反軸受側外径端部３２ａと固定子４５の内径部との接
触を防止するようにしていたが、効果が少なく、さらに
改善する必要があった。In the prior art shown in FIG. 6, the eccentric rotary motion of the crankshaft 44 causes the rotor core, which is the rotor core, of the rotor bearing core outer bearing side outer diameter end portion 32a to move to the stator. There was a problem of contact with the inner diameter of the stator core of No. 45. As a method of preventing this, for example, the inner diameter of the rotor 33 of the rotor 33 of FIG. 6 is formed to be large, and the bearing portion 43 is inserted into the rotor core. Although the contact between the bearing-side outer diameter end portion 32a and the inner diameter portion of the stator 45 is prevented, the effect is small, and further improvement is necessary.
【０００６】しかも電動機１０の大形化にともない、回
転子積層コア３２のコア枚数が増加した場合、回転子鉄
心自体の重量が増加し、クランクシャフト４４の偏心回
転運動は大きくなり、特にクランクシャフト４４の先端
近傍に位置する回転子積層コア反軸受側外径端部３２ａ
は、回転子の振れ回りがさらに大きくなるため、固定子
４５の内径部と接触する面積が大きくなるという問題が
あった。In addition, when the number of cores of the rotor laminated core 32 increases as the size of the electric motor 10 increases, the weight of the rotor core itself increases, and the eccentric rotational movement of the crankshaft 44 increases, especially the crankshaft. An outer diameter end 32a of the rotor laminated core opposite to the bearing located near the tip of the rotor 44
However, since the whirling of the rotor is further increased, there is a problem that the area in contact with the inner diameter portion of the stator 45 is increased.
【０００７】また、他の従来技術である前記実公平１−
９２６４号公報記載の回転子においても、軸受部が大き
く入り込むように回転子６５の軸受側内径６２を深く形
成しているが、回転子６５の鉄心６６においては触れ回
りが発生することが予想され、固定子鉄心の内径に接触
する恐れがあった。In addition, the above-mentioned actual fair 1-
Also in the rotor described in Japanese Patent No. 9264, the bearing-side inner diameter 62 of the rotor 65 is deeply formed so that the bearing portion largely enters, but it is expected that the iron core 66 of the rotor 65 will be touched. , There was a risk of contact with the inner diameter of the stator core.
【０００８】本発明は、上記従来技術の問題点を解決す
るためになされたもので、本発明の目的は、クランク軸
の偏心回転運動により生じる、回転子の積層コア外径端
部と固定子鉄心内径との接触を防止し、信頼性が高く、
生産性の良い密閉形電動圧縮機を提供することにある。[0008] The present invention has been made to solve the problems of the prior art, an object of the present invention is produced by eccentric rotation of the crank shaft, and the stator laminated core outer diameter end of the rotor Prevents contact with the inner diameter of the iron core and has high reliability,
It is to provide a hermetic electric compressor with good productivity.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明の密閉形電動圧縮機に係る第一の発明の構成
は、密閉容器内に、電動機と該電動機にクランク軸を介
して連結する圧縮機構部とを配設し、前記圧縮機構部側
に設けた軸受で片持ち支持される前記電動機の回転子
を、内径寸法の異なる複数種類のコアを積層して形成し
た密閉形電動圧縮機において、上記回転子の、反軸受側
の積層コア端部の凹部内径寸法を、回転子軸内径寸法に
対して１０〜３５％大きく形成するとともに、前記凹部
の深さを、回転子積層コア寸法の３０〜５０％に形成し
たものである。あるいは、上記回転子の、反軸受側の積
層コア端部の凹部内径寸法を、回転子軸内径寸法に対し
て３５〜６０％大きく形成するとともに、前記凹部の深
さを、回転子積層コア寸法の５〜３０％に形成したもの
である。In order to achieve the above object, the structure of the first invention relating to the hermetic electric compressor of the present invention is such that an electric motor and a crankshaft for the electric motor are provided in a hermetic container. A hermetically sealed electric motor in which a rotor for the electric motor, which is provided with a compression mechanism portion to be connected and is cantilevered by a bearing provided on the compression mechanism portion side, is formed by laminating a plurality of types of cores having different inner diameters. In the compressor, the inner diameter of the recess at the end of the laminated core on the side opposite to the bearing of the rotor is formed to be 10 to 35% larger than the inner diameter of the rotor shaft, and the depth of the recess is determined by the rotor lamination. It is formed to 30 to 50% of the core size. Alternatively, the inner diameter of the concave portion of the laminated core end portion on the side opposite to the bearing of the rotor is formed to be 35 to 60% larger than the inner diameter of the rotor shaft, and the depth of the concave portion is set to the rotor laminated core dimension. It is formed to 5 to 30%.
【００１０】また、上記目的を達成するために、本発明
の密閉形電動圧縮機に係る第二の発明の構成は、密閉容
器内に、電動機と該電動機にクランク軸を介して連結す
る圧縮機構部とを配設し、前記圧縮機構部側に設けた軸
受で片持ち支持される前記電動機の回転子を、ダイカス
トで一体形成した積層コアとしてなる密閉形電動圧縮機
において、軸受側エンドリング部体積より反軸受側エン
ドリング部の体積を１．１〜３．０倍増加させたもので
ある。さらに、上記第一，第二の発明を組み合わせたも
のである。In order to achieve the above object, the structure of the second invention relating to the hermetic electric compressor of the present invention is a compression mechanism for connecting an electric motor and the electric motor via a crankshaft in a hermetic container. In the hermetic electric compressor, the rotor of the electric motor, which is cantilevered by a bearing provided on the side of the compression mechanism, is integrally formed by die casting as a laminated core. The volume of the end ring portion on the side opposite to the bearing is increased by 1.1 to 3.0 times the volume. Furthermore, it is a combination of the first and second inventions.
【００１１】すなわち、本発明では、回転子コアの構成
を、クランク軸に嵌着される回転子内径寸法部より反軸
受側の積層コア端部のコア凹部内径寸法を大きくし、か
つ、コア凹部を深く形成し、さらに、反軸受側エンドリ
ング部の形状を軸受側エンドリング部の形状より大きく
形成させることによって、クランク軸の偏心回転運動に
より生じる、回転子の積層コア外径端部と固定子鉄心内
径との接触を防止する手段を講じたものである。That is, according to the present invention, the rotor core is configured such that the inner diameter of the core recess at the end of the laminated core on the side opposite to the bearing is larger than the inner diameter of the rotor fitted to the crankshaft, and the core recess is larger. Is formed deeper and the shape of the end ring on the side opposite to the bearing is made larger than the shape of the end ring on the side of the bearing so that it is fixed to the outer diameter end of the laminated core of the rotor caused by the eccentric rotational movement of the crankshaft. This is a measure to prevent contact with the inner diameter of the child core.
【００１２】[0012]
【作用】上記技術的手段による働きは次のとおりであ
る。回転子コアの構成を、反軸受側の積層コア端部の凹
部内径寸法を回転子軸径部の積層コア内径寸法より大き
く、かつ、コア凹部を深くすることにより、この部分の
鉄心の強度を弱めることによって、積層コアをダイカス
トで一体成形する際に、アルミが冷却するときに生じる
熱収縮力の作用により、コアが内径に向かって収縮し
て、外径部が回転子鉄心の中央部より細径化する。した
がって、クランク軸の偏心回転運動により生じる、回転
子の積層コア外径端部と固定子鉄心内径との接触を防止
することができる。The function of the above technical means is as follows. The rotor core is configured so that the inner diameter of the recess at the end of the laminated core on the non-bearing side is larger than the inner diameter of the laminated core at the diameter of the rotor shaft, and the core recess is deeper to improve the strength of the core. By weakening, when the laminated core is integrally molded by die casting, the core shrinks toward the inner diameter due to the action of the heat shrinkage force generated when the aluminum cools, and the outer diameter portion is more than the center portion of the rotor core. Reduce the diameter. Therefore, it is possible to prevent the contact between the outer diameter end portion of the laminated core of the rotor and the inner diameter of the stator core, which is caused by the eccentric rotational movement of the crankshaft.
【００１３】反軸受側エンドリング部の形状を軸受側エ
ンドリング部より大きく形成することによっても、回転
子鉄心の中央部より回転子積層コア外径端部の縮小化を
図ることができる。そして、回転子コア端部の形状変更
と組み合わせることによりさらに確実に回転子鉄心端部
の外径を縮小することが容易にでき、コア接触を皆無に
することができる。また、本発明によれば、コア寸法の
変更およびダイカスト金型の変更のみで容易に生産がで
きるため生産性が良く、低価格で目的を達成することが
できる。By forming the shape of the non-bearing side end ring portion larger than that of the bearing side end ring portion, it is possible to reduce the outer diameter end portion of the rotor laminated core from the central portion of the rotor core. Then, by combining with the shape change of the rotor core end portion, the outer diameter of the rotor core end portion can be easily reduced more reliably, and the core contact can be eliminated altogether. Further, according to the present invention, since the production can be easily performed only by changing the core size and the die-casting die, the productivity can be improved and the object can be achieved at a low cost.
【００１４】[0014]
【実施例】以下、本発明の各実施例を図１ないし図５を
参照して説明する。
〔実施例 １〕図１は、本発明の一実施例に係る密閉形
電動圧縮機の縦断面図、図２は、図１の密閉形電動圧縮
機における電動機の詳細断面図、図３は、図２の電動機
における回転子の詳細断面図である。Embodiments of the present invention will be described below with reference to FIGS. [Embodiment 1] FIG. 1 is a vertical sectional view of a hermetic electric compressor according to an embodiment of the present invention, FIG. 2 is a detailed sectional view of an electric motor in the hermetic electric compressor of FIG. 1, and FIG. FIG. 3 is a detailed sectional view of a rotor in the electric motor of FIG. 2.
【００１５】図１は、本発明の一実施例に係る回転子を
密閉形電動圧縮機に組み込んだ状態の断面図を示し、１
は密閉容器、２はピストン、３はシリンダ、４はヘット
カバ、５はクランクシャフト、６は回転子軸受、７はス
プリング、８は固定子、９は回転子、１０は電動機であ
る。すなわち、密閉容器１内に、電動機１０と該電動機
１０にクランクシャフト５を介して連結する圧縮機構部
とが配設され、電動機１０の回転子９は、回転子軸受６
で片持ち支持され、電動機１０の固定子８の下部はスプ
リング７で弾性支持されている。FIG. 1 is a sectional view showing a state where a rotor according to an embodiment of the present invention is incorporated in a hermetic electric compressor.
Is a closed container, 2 is a piston, 3 is a cylinder, 4 is a head cover, 5 is a crankshaft, 6 is a rotor bearing, 7 is a spring, 8 is a stator, 9 is a rotor, and 10 is an electric motor. That is, the electric motor 10 and the compression mechanism portion that is connected to the electric motor 10 via the crankshaft 5 are arranged in the closed container 1, and the rotor 9 of the electric motor 10 has the rotor bearing 6
Is supported in a cantilever manner, and the lower portion of the stator 8 of the electric motor 10 is elastically supported by a spring 7.
【００１６】図２，３において、１２は、回転子９を構
成する回転子積層コア、１２ａは回転子積層コア軸受側
外径端部、１２ｂは回転子積層コア反軸受側外径端部、
１３は、回転子積層コア１２のスロット部（図示せず）
より注入し形成された軸受側アルミエンドリング部であ
り、１４は反軸受側アルミエンドリング部である。ま
た、１５は、固定子８を構成する固定子積層コア、１６
は、回転子軸径部積層コア、１７は軸受側積層コア凹
部、１８は反軸受側積層コア凹部である。2 and 3, reference numeral 12 denotes a rotor laminated core constituting the rotor 9, 12a denotes a rotor laminated core bearing side outer diameter end portion, 12b denotes a rotor laminated core non-bearing side outer diameter end portion,
13 is a slot portion (not shown) of the rotor laminated core 12
The bearing-side aluminum end ring portion is formed by further injection, and 14 is a non-bearing-side aluminum end ring portion. Reference numeral 15 denotes a stator laminated core that constitutes the stator 8, and 16
Is a rotor shaft diameter portion laminated core, 17 is a bearing side laminated core recessed portion, and 18 is a non-bearing side laminated core recessed portion.
【００１７】このように構成された密閉形電動圧縮機１
１は、電動機１０の駆動により回転子９が回転し、回転
子９の内径に焼嵌めまたは圧入してあるクランクシャフ
ト５の偏心回転運動によりピストン２が往復運動を行
い、シリンダ３内に冷媒ガスを吸い込み、圧縮し、吐き
出しを行う。The hermetic electric compressor 1 thus constructed
1 is that the rotor 9 is rotated by the drive of the electric motor 10, and the piston 2 reciprocates due to the eccentric rotational movement of the crankshaft 5 which is shrink-fitted or press-fitted into the inner diameter of the rotor 9, and the refrigerant gas is stored in the cylinder 3. Inhale, compress and exhale.
【００１８】ここで、反軸受側積層コア凹部１８の凹部
内径寸法を、回転子軸径部積層コア１６の内径寸法に対
して１０〜３５％大きく形成するとともに、前記反軸受
側積層コア凹部１８の深さを回転子積層コア１２の全長
寸法に対して３０〜５０％に形成している。これによ
り、回転子積層コア反軸受側外径端部１２ｂの強度を弱
め、アルミダイカスト後のアルミの熱収縮力によって、
前記回転子積層コア反軸受側外径端部１２ｂからの長さ
寸法で、回転子積層コア１２全長に対して１〜３０％の
範囲（図３に示すＨ部）、また、前記回転子積層コア反
軸受側外径端部１２ｂからの径寸法で、アルミダイカス
ト前の回転子積層コア１２の外径寸法より直径で０．２
〜１．２ｍｍの範囲（図３に示すｄ部）を回転軸方向に
縮小させることができる。Here, the inner diameter of the recess of the non-bearing side laminated core recess 18 is formed to be 10 to 35% larger than the inner diameter of the rotor shaft diameter portion laminated core 16, and the anti-bearing side laminated core recess 18 is formed. Is 30 to 50% of the total length of the rotor laminated core 12. Thereby, the strength of the rotor laminated core non-bearing side outer diameter end portion 12b is weakened, and the heat shrinkage force of aluminum after aluminum die casting causes
The length dimension from the outer diameter end 12b of the rotor laminated core opposite to the bearing is in the range of 1 to 30% with respect to the total length of the rotor laminated core 12 (H portion shown in FIG. 3), and the rotor laminated The diameter from the outer diameter end 12b of the non-bearing side of the core is 0.2 from the outer diameter of the rotor laminated core 12 before aluminum die casting.
It is possible to reduce the range of 1.2 mm (portion d shown in FIG. 3) in the rotation axis direction.
【００１９】したがって、固定子８の鉄心（固定子積層
コア１５）内径と回転子積層コア反軸受側外径端部１２
ｂとの接触を防止することが可能となる。特に、電動機
１０が大形化され、回転子積層コア１２の枚数が増加す
るため、クランクシャフト５の偏心回転運動が大きくな
り、回転子９の回転振れ回りが大きくなる場合において
も、前記回転子積層コア反軸受側外径端部１２ｂを内径
側に縮小させているため、固定子８の鉄心内径と前記回
転子積層コア反軸受側外径端部１２ｂとが接触する問題
を解決することができる。Therefore, the inner diameter of the iron core (stator laminated core 15) of the stator 8 and the outer diameter end 12 of the rotor laminated core opposite to the bearing side.
It is possible to prevent contact with b. In particular, since the electric motor 10 is upsized and the number of rotor laminated cores 12 is increased, the eccentric rotary motion of the crankshaft 5 is increased and the rotational whirling of the rotor 9 is increased. Since the laminated core non-bearing side outer diameter end portion 12b is reduced to the inner diameter side, it is possible to solve the problem of contact between the iron core inner diameter of the stator 8 and the rotor laminated core non-bearing side outer diameter end portion 12b. it can.
【００２０】〔実施例 ２〕図４は、本発明の他の実施
例に係る回転子の詳細断面図である。図中、図３と同一
符号のものは先の実施例と同等部であるから、その説明
を省略する。図４において、１９は反軸受側積層コア凹
部であり、この反軸受側積層コア凹部１９の内径寸法
を、回転子軸径部積層コア１６の内径寸法に対して３５
〜６０％大きく形成するとともに、前記反軸受側積層コ
ア凹部１９の深さを回転子積層コア１２の全長寸法に対
して５〜３０％に形成している。これによって、先の図
３の実施例と同様の効果を得ることができる。[Embodiment 2] FIG. 4 is a detailed sectional view of a rotor according to another embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 3 are the same parts as those in the previous embodiment, and therefore their explanations are omitted. In FIG. 4, reference numeral 19 designates a non-bearing side laminated core recess, and the inner diameter of the anti-bearing side laminated core recess 19 is 35 with respect to the inner diameter of the rotor shaft diameter portion laminated core 16.
The depth of the non-bearing side laminated core concave portion 19 is formed to be 5 to 30% of the total length of the rotor laminated core 12 while being formed to be -60% larger. As a result, the same effect as that of the embodiment shown in FIG. 3 can be obtained.
【００２１】また、反軸受側アルミエンドリング部１４
のアルミ体積量を軸受側アルミエンドリング部１３より
１．１〜３．０倍増加させている。これにより、アルミ
ダイカスト後に生ずるアルミの熱収縮力はさらに大きく
なり、回転子積層コア反軸受側外径端部１２ｂは回転子
９の外径寸法に対して、より一層、回転子９の内径方向
に縮小する。Further, the aluminum end ring portion 14 on the non-bearing side
The volume of aluminum is increased 1.1 to 3.0 times that of the bearing side aluminum end ring portion 13. As a result, the heat shrinkage force of aluminum generated after the aluminum die casting is further increased, and the rotor laminated core non-bearing side outer diameter end portion 12b is much larger than the outer diameter dimension of the rotor 9 in the inner diameter direction of the rotor 9. Shrink to.
【００２２】すなわち、前記回転子積層コア反軸受側外
径端部１２ｂからの長さ寸法で、回転子積層コア１２全
長に対して１〜３０％の範囲（図４に示すＨ部）、ま
た、前記回転子積層コア反軸受側外径端部１２ｂからの
径寸法で、アルミダイカスト前の回転子積層コア１２の
外径寸法より直径で０．２〜１．２ｍｍの範囲（図４に
示すｄ部）を回転軸方向に縮小させることができる。な
お、このことは、先の図２，３の実施例に組み合せて
も、同様の効果を得ることは言うまでもない。That is, the length dimension from the outer diameter end portion 12b of the rotor laminated core opposite to the bearing is in the range of 1 to 30% with respect to the total length of the rotor laminated core 12 (H portion shown in FIG. 4), The radial dimension from the outer diameter end 12b of the rotor laminated core opposite to the bearing is 0.2 to 1.2 mm in diameter from the outer diameter of the rotor laminated core 12 before aluminum die casting (shown in FIG. 4). The part (d) can be reduced in the rotation axis direction. It is needless to say that the same effect can be obtained even if this is combined with the embodiments of FIGS.
【００２３】〔実施例 ３〕図５は、本発明のさらに他
の実施例に係る回転子の詳細断面図である。図中、図３
と同一符号のものは先の実施例と同等部であるから、そ
の説明を省略する。図５において、２０は、反軸受側積
層コア凹部２０であり、この反軸受側積層コア凹部２０
の内径寸法を、軸受側積層コア凹部１７の内径寸法と同
じ寸法にするとともに、反軸受側積層コア凹部２０の凹
部深さを回転子積層コア１２の全長寸法に対して３０〜
５０％にしたものである。これにより、先の図２，３の
実施例と同様の効果を得ることができる。[Embodiment 3] FIG. 5 is a detailed sectional view of a rotor according to still another embodiment of the present invention. Figure 3
The parts having the same reference numerals as those in the above are the same parts as those in the previous embodiment, and the description thereof will be omitted. In FIG. 5, reference numeral 20 denotes a non-bearing side laminated core concave portion 20, and this anti-bearing side laminated core concave portion 20.
Has the same inner diameter as that of the bearing-side laminated core recess 17, and the recess depth of the non-bearing-side laminated core recess 20 is 30 to 30 with respect to the total length of the rotor laminated core 12.
It is 50%. As a result, it is possible to obtain the same effects as those of the above-described embodiments of FIGS.
【００２４】また、反軸受側アルミエンドリング部１４
のアルミ体積量を軸受側アルミエンドリング部１３より
１．１〜３．０倍増加させることにより、アルミダイカ
スト後に生じる、アルミの熱収縮力はさらに大きくな
り、回転子積層コア反軸受側外径端部１２ｂは回転子９
の外径寸法に対して、より一層、回転子９の内径方向に
縮小する。Further, the aluminum end ring portion 14 on the non-bearing side
By increasing the volume of aluminum in the bearing side aluminum end ring portion 13 by 1.1 to 3.0 times, the heat shrinkage force of aluminum generated after aluminum die casting is further increased, and the rotor laminated core non-bearing side outer diameter is increased. The end 12b is the rotor 9
The outer diameter of the rotor 9 is further reduced in the inner diameter direction of the rotor 9.
【００２５】さらに、この回転子の積層形成方法を、反
軸受側積層コア凹部２０内径と軸受側積層コア凹部１７
の内径とを同じ内径に形成したことにより、反軸受側積
層コア凹部２０と軸受側積層コア凹部１７との抜き型の
共用化を図ることができるため、金型費用の低減が可能
である。Furthermore, this rotor lamination method is applied to the inner diameter of the non-bearing side laminated core concave portion 20 and the bearing side laminated core concave portion 17
By forming the inner diameter of the same to the inner diameter of the bearing, it is possible to use a common cutting die for the non-bearing side laminated core concave portion 20 and the bearing side laminated core concave portion 17, so that the die cost can be reduced.
【００２６】上記の各実施例によれば、反軸受側の積層
コア端部の凹部内径寸法を、回転子軸内径寸法より大き
く形成し、かつ、コア凹部を深く形成することにより、
回転子積層コアの強度を弱め、アルミダイカスト後に生
じるアルミの収縮力により回転子積層コア反軸受側外径
端部を回転子の外径寸法より縮小することができ、固定
子積層コアの内径と回転子積層コア反軸受側外径端部と
の接触を防止することができる。According to each of the above-described embodiments, the inner diameter of the recess at the end of the laminated core on the side opposite to the bearing is formed larger than the inner diameter of the rotor shaft, and the core recess is deeply formed.
The strength of the rotor laminated core is weakened, and the outer diameter end of the rotor laminated core opposite to the bearing can be made smaller than the outer diameter of the rotor by the contraction force of aluminum generated after aluminum die casting. It is possible to prevent contact with the outer diameter end of the rotor laminated core opposite to the bearing.
【００２７】また、反軸受側エンドリング部の形状を軸
受側エンドリング部形状より大きく形成させることよっ
ても、アルミダイカスト後に生じるアルミの収縮力によ
り、回転子積層コア反軸受側外径端部を回転子の外径寸
法より縮小できるため、固定子鉄心内径と回転子積層コ
ア反軸受側外径端部との接触を防止することができる。Even if the shape of the non-bearing side end ring portion is made larger than that of the bearing side end ring portion, the contraction force of aluminum generated after aluminum die casting causes the rotor laminated core non-bearing side outer diameter end portion to move. Since the size can be made smaller than the outer diameter of the rotor, it is possible to prevent contact between the inner diameter of the stator core and the outer diameter end of the rotor laminated core opposite to the bearing.
【００２８】これらを組み合わせることにより、さらに
確実に、回転子積層コア反軸受側外径端部を縮小するこ
とが容易にでき、コア接触を皆無にできる効果がある。
特に、回転子積層コアの枚数増加により、回転子の回転
振れが大きくなる場合に対して有効な解決手段である。
また、コア寸法の若干の変更、回転子のエンドリング寸
法を若干変更するのみで、容易に上記目的を達成するこ
とができるため、信頼性が高く、生産性の良い低価格の
密閉形電動圧縮機を提供することができる。By combining these, there is an effect that it is possible to more reliably and easily reduce the outer diameter end of the rotor laminated core opposite to the bearing, and to eliminate core contact.
In particular, this is an effective solution for the case where the rotational runout of the rotor becomes large as the number of laminated rotor cores increases.
In addition, the above objectives can be easily achieved by only slightly changing the core dimensions and the rotor end ring dimensions. Therefore, highly reliable, highly productive and low-priced hermetic electric compression Machine can be provided.
【００２９】[0029]
【発明の効果】以上詳細に説明したように、本発明によ
れば、クランク軸の偏心回転運動により生じる、回転子
の積層コア外径端部と固定子鉄心内径との接触を防止
し、信頼性が高く、生産性の良い密閉形電動圧縮機を提
供することができる。As described in detail above, according to the present invention, the contact between the outer diameter end of the laminated core of the rotor and the inner diameter of the stator core, which is caused by the eccentric rotational movement of the crankshaft, is prevented and the reliability is improved. It is possible to provide a hermetic electric compressor having high productivity and good productivity.
【図１】本発明の一実施例に係る密閉形電動圧縮機の縦
断面図である。FIG. 1 is a vertical cross-sectional view of a hermetic electric compressor according to an embodiment of the present invention.
【図２】図１の密閉形電動圧縮機における電動機の詳細
断面図である。FIG. 2 is a detailed sectional view of an electric motor in the hermetic electric compressor of FIG.
【図３】図２の電動機における回転子の詳細断面図であ
る。3 is a detailed cross-sectional view of a rotor in the electric motor of FIG.
【図４】本発明の他の実施例に係る回転子の詳細断面図
である。FIG. 4 is a detailed sectional view of a rotor according to another embodiment of the present invention.
【図５】本発明のさらに他の実施例に係る回転子の詳細
断面図である。FIG. 5 is a detailed sectional view of a rotor according to still another embodiment of the present invention.
【図６】従来の密閉形電動圧縮機の電動機部を示す要部
断面図である。FIG. 6 is a cross-sectional view of an essential part showing a motor part of a conventional hermetic electric compressor.
【図７】他の従来の回転子を示す断面図である。FIG. 7 is a cross-sectional view showing another conventional rotor.
１…密閉容器、５…クランクシャフト、６…回転子軸
受、８…固定子、９…回転子、１０…電動機、１２…回
転子積層コア、１２ｂ…回転子積層コア反軸受側外径端
部、１３…軸受側アルミエンドリング部、１４…反軸受
側アルミエンドリング部、１５…固定子積層コア、１６
…回転子軸径部積層コア、１７…軸受側積層コア凹部、
１８，１９，２０…反軸受側積層コア凹部。DESCRIPTION OF SYMBOLS 1 ... Airtight container, 5 ... Crank shaft, 6 ... Rotor bearing, 8 ... Stator, 9 ... Rotor, 10 ... Electric motor, 12 ... Rotor laminated core, 12b ... Rotor laminated core Non-bearing side outer diameter end , 13 ... Bearing side aluminum end ring part, 14 ... Non-bearing side aluminum end ring part, 15 ... Stator laminated core, 16
... rotor shaft diameter laminated core, 17 bearing side laminated core recess,
18, 19, 20 ... Anti-bearing side laminated core recess.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 瀬下 孝司 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所リビング機器事業 部冷熱本部内 (72)発明者 水戸部 政雄 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所リビング機器事業 部冷熱本部内 (72)発明者 大内 好男 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所リビング機器事業 部冷熱本部内 (56)参考文献 特開 平４−190669（ＪＰ，Ａ) 特開 昭58−89041（ＪＰ，Ａ) 特開 昭53−57406（ＪＰ，Ａ) 特開 平３−285530（ＪＰ，Ａ) 実開 平１−93936（ＪＰ，Ｕ) 実開 平３−120672（ＪＰ，Ｕ) 実開 昭64−45451（ＪＰ，Ｕ) 実開 昭58−156182（ＪＰ，Ｕ) 実開 昭63−58855（ＪＰ，Ｕ) 実公 平１−9264（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F04B 39/00 106 H02K 1/22 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Seshita 800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture, Hitachi, Ltd. Living Equipment Division, Cooling & Heat Headquarters (72) Inventor Masao Mito Oita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture No. 800 Inside the Cooling & Heat Headquarters, Hitachi, Ltd. (72) Inventor Yoshio Ouchi Inside the Cooling & Heat Headquarters, Living Machinery Division, Hitachi, Ltd. No. 800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi (56) References Flat 4-190669 (JP, A) JP 58-89041 (JP, A) JP 53-57406 (JP, A) JP 3-285530 (JP, A) , U) Actual opening 3-120672 (JP, U) Actual opening Sho 64-45451 (JP, U) Actual opening Sho 58-156182 (JP, U) Actual opening Sho 63-58855 (JP, ) Real public flat 1-9264 (JP, Y2) (58 ) investigated the field (Int.Cl. 7, DB name) F04B 39/00 106 H02K 1/22
Claims (2)
電動機と、該電動機に前記回転子に固着されたクランク
軸を介して連結される圧縮機構部と、前記電動機の回転
子が固着された前記クランク軸を片持ち支持する、前記
電動機の前記圧縮機構部側に設けられた軸受とを備え、
前記電動機の回転子は、内径寸法の異なる複数種類の積
層されたコアをダイカストで一体形成してなる回転子積
層コアと、該回転子積層コアの端部に設けられた軸受側
エンドリング部及び反軸受側エンドリング部とを有し、
前記回転子積層コアの反軸受側端部に設けられた前記ク
ランク軸方向に凹んだ凹部の内径が前記回転子積層コア
に設けられた前記クランク軸が嵌められる軸径部の内径
よりも大きく、前記反軸受側エンドリング部の体積が前
記軸受側エンドリング部の体積よりも大きく、前記回転
子積層コアの反軸受側端部の外径が前記回転子積層コア
の中央部の外径よりも細い密閉形電動圧縮機。To 1. A sealed vessel, and <br/> motor having a stator and a rotor, a compression mechanism portion connected via a crank shaft which is secured to the rotor in said motor, said electric motor rotation
A cantilever-supports the crankshaft to which a child is fixed;
A bearing provided on the side of the compression mechanism of the electric motor ,
The rotor of the electric motor has multiple types of products with different inner diameters.
A rotor product formed by die-casting layered cores
Layer core and bearing side provided at the end of the rotor laminated core
Has an end ring portion and an end ring portion opposite to the bearing,
The claw provided at the end opposite to the bearing of the rotor laminated core
The inner diameter of the recess recessed in the rank axis direction is the rotor laminated core
Inner diameter of the shaft diameter part on which the crankshaft is fitted
And the volume of the non-bearing end ring is
The volume is larger than the volume of the end ring on the bearing side.
The outer diameter of the end opposite to the bearing of the laminated core is the rotor laminated core.
A hermetic electric compressor that is thinner than the outer diameter of the central part of .
られた前記凹部の内径と、前記回転子積層コアの軸受側
端部に設けられた凹部の内径とが等しい請求項１記載の
密閉形電動圧縮機。2. The rotor laminated core is provided at the end opposite to the bearing.
Inner diameter of the recess formed and the bearing side of the rotor laminated core
The hermetic electric compressor according to claim 1, wherein the inner diameters of the recesses provided at the ends are equal .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23067493A JP3534432B2 (en) | 1993-09-17 | 1993-09-17 | Hermetic electric compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23067493A JP3534432B2 (en) | 1993-09-17 | 1993-09-17 | Hermetic electric compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0783170A JPH0783170A (en) | 1995-03-28 |
| JP3534432B2 true JP3534432B2 (en) | 2004-06-07 |
Family
ID=16911530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23067493A Expired - Lifetime JP3534432B2 (en) | 1993-09-17 | 1993-09-17 | Hermetic electric compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3534432B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4565780B2 (en) * | 2001-08-31 | 2010-10-20 | 東芝キヤリア株式会社 | Manufacturing method of electric compressor |
| KR100621800B1 (en) * | 2004-09-14 | 2006-09-19 | 삼성전자주식회사 | Rotary Compressor |
| WO2009084245A1 (en) * | 2007-12-27 | 2009-07-09 | Mitsubishi Electric Corporation | Electric motor for compressor, compressor, and freezing cycle device |
| JP5972014B2 (en) * | 2012-04-10 | 2016-08-17 | 三菱電機株式会社 | Compressor and manufacturing method of compressor |
| CN105790466B (en) * | 2016-04-20 | 2018-12-04 | 安徽美芝精密制造有限公司 | Electric machine assembly and rotary compressor for rotary compressor |
-
1993
- 1993-09-17 JP JP23067493A patent/JP3534432B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0783170A (en) | 1995-03-28 |
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