JP2001186701A - Permanent magnet rotor of motor and enclosed compressor using it - Google Patents
Permanent magnet rotor of motor and enclosed compressor using itInfo
- Publication number
- JP2001186701A JP2001186701A JP36855399A JP36855399A JP2001186701A JP 2001186701 A JP2001186701 A JP 2001186701A JP 36855399 A JP36855399 A JP 36855399A JP 36855399 A JP36855399 A JP 36855399A JP 2001186701 A JP2001186701 A JP 2001186701A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnet rotor
- hole
- iron core
- laminated iron
- 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.)
- Granted
Links
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、電動機の永久磁石
回転子およびこれを用いた密閉型圧縮機に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet rotor for an electric motor and a hermetic compressor using the same.
【0002】[0002]
【従来の技術】従来、密閉型圧縮機などに用いられる電
動機の永久磁石回転子は特開平2−184231号公
報、特開平5−304751号公報などに記載されてい
るように、積層鉄板鉄心部を内側にして、その外側に複
数の永久磁石を配置し、回転時の遠心力により磁石が飛
散しないように、また磁石粉などが回転子外部に極力漏
れないように回転子の外周部と軸方向両端面を覆って構
成されるもの、あるいは特開平9−84285号公報な
どに記載されているように、積層鉄板鉄心内部に複数の
永久磁石を組み込み、軸方向両端面のみを覆って、磁石
粉などが回転子外部に極力漏れないような構成にしてい
る。これらの永久磁石回転子は、通常クランク軸に固定
して使用し、その固定方法は圧入によるもの、また特開
平7−194071号公報に記載されるような軸挿入孔
の加熱による方法などがある。2. Description of the Related Art Conventionally, permanent magnet rotors of electric motors used for hermetic compressors and the like are disclosed in Japanese Patent Application Laid-Open Nos. 2-184231 and 5-304751, as disclosed in Japanese Patent Application Laid-Open Nos. Hei 5-3044751. The inside of the rotor and the outer periphery of the rotor are arranged so that magnets are not scattered by centrifugal force during rotation and that magnet powder etc. leak as much as possible to the outside of the rotor. A plurality of permanent magnets incorporated in the inside of a laminated iron plate core as described in Japanese Patent Application Laid-Open No. 9-84285, etc. The structure is such that powder and the like do not leak outside the rotor as much as possible. These permanent magnet rotors are usually used by fixing them to a crankshaft, and the fixing method includes press-fitting and a method of heating a shaft insertion hole as described in JP-A-7-194071. .
【0003】また、従来のような永久磁石回転子を密閉
型圧縮機に用いた場合、圧縮機構によって生じるアンバ
ランスを矯正するために永久磁石回転子の軸方向一端ま
たは両端部に薄板材などを付加していた。さらに、この
ような密閉型圧縮機において電動機の固定子は通常円周
方向のハウジング(胴シェル)に密着して固定されてい
るため、吸入から吐出に連通する冷媒通路として固定子
外周に貫通溝を設けていた。When a conventional permanent magnet rotor is used in a hermetic compressor, a thin plate or the like is provided at one or both ends in the axial direction of the permanent magnet rotor in order to correct imbalance caused by a compression mechanism. Had been added. Further, in such a hermetic compressor, the stator of the electric motor is usually fixed in close contact with the circumferential housing (body shell), so that a through-groove is formed in the outer periphery of the stator as a refrigerant passage communicating from suction to discharge. Was provided.
【0004】図12に従来の永久磁石回転子を組み込ん
だ密閉型圧縮機の一例として、横型スクロール圧縮機を
示し、以下図面に基づき説明する。図12におけるスク
ロール圧縮機は、横型のハウジング(胴シェル)1の一
端側の吸入口2から取り入れられた冷媒は可動スクロー
ル3と固定スクロール4で構成される圧縮機構部で圧縮
吐出され、矢印のように圧縮機構部外周近傍に設けられ
た貫通孔5から駆動部である電動機の固定子6の外周に
設けられた貫通溝7を通過し、ハウジング1の他端側の
圧縮機吐出口8から吐き出されるようになっている。FIG. 12 shows a horizontal scroll compressor as an example of a hermetic compressor incorporating a conventional permanent magnet rotor, which will be described below with reference to the drawings. In the scroll compressor shown in FIG. 12, the refrigerant taken in from a suction port 2 at one end of a horizontal housing (body shell) 1 is compressed and discharged by a compression mechanism section composed of a movable scroll 3 and a fixed scroll 4. As described above, through the through hole 5 provided in the vicinity of the outer periphery of the compression mechanism portion, through the through groove 7 provided in the outer periphery of the stator 6 of the electric motor which is the driving portion, and from the compressor discharge port 8 on the other end side of the housing 1. It is to be exhaled.
【0005】さらに詳しくは、前記圧縮機構部は可動ス
クロール3と固定スクロール4で構成される三日月型気
室が固定子6と、永久磁石回転子を構成する積層鉄板鉄
心9を貫通して積層鉄板鉄心9が固定され軸受部材1
0、11とにより支持されるクランク軸12を介して伝
達される電動機からの回転力を自転防止機構13により
変換される旋回運動により、外周から中心に向かって容
積を縮小することにより構成される。このとき、前記ク
ランク軸12は、圧縮機構部からの負荷を受けて振れ回
り運動を起こすため、アンバランスな状態となり、通常
これを避けるため回転子端面に薄板材14などのバラン
スウェイトを付加して、バランス調整を行なっていた。More specifically, in the compression mechanism, a crescent-shaped air chamber composed of a movable scroll 3 and a fixed scroll 4 passes through a stator 6 and a laminated iron core 9 constituting a permanent magnet rotor. Iron core 9 is fixed and bearing member 1
The rotation force from the electric motor transmitted through the crankshaft 12 supported by the rotation shafts 0 and 11 reduces the volume from the outer periphery toward the center by the turning motion converted by the rotation prevention mechanism 13. . At this time, the crankshaft 12 undergoes a whirling motion under the load from the compression mechanism, so that the crankshaft 12 is in an unbalanced state. To avoid this, a balance weight such as a thin plate 14 is usually added to the rotor end face. Was adjusting the balance.
【0006】[0006]
【発明が解決しようとする課題】しかしながら、従来の
永久磁石回転子を構成する積層鉄板鉄心9にクランク軸
12を圧入または焼嵌め固定すると、積層鉄板鉄心9の
中心に設けたクランク軸挿入用貫通孔の変形により積層
鉄板鉄心9の外周あるいは内部に設置した永久磁石が割
れ易く挿入性、信頼性に欠けるという問題がある。However, when the crankshaft 12 is press-fitted or shrink-fitted into the laminated iron core 9 constituting the conventional permanent magnet rotor, the crankshaft insertion through-hole provided at the center of the laminated iron core 9 is provided. Due to the deformation of the hole, there is a problem that the permanent magnet installed on the outer periphery or inside of the laminated iron core 9 is easily broken and lacks insertability and reliability.
【0007】また、密閉型圧縮機に従来のような永久磁
石回転子を用い、アンバランスを矯正するために薄板材
14などのバランスウェイトを付加した場合、密閉型圧
縮機は全長の長いものとなり、小型化、部品点数の削
減、コストダウンなどの妨げとなっている。さらに、こ
のような密閉型圧縮機における電動機の固定子6には、
吸入から吐出に連通する冷媒通路として外周に貫通溝7
を設けていたため、固定子6の固定が不安定となり、騒
音、振動低下の妨げとなっている。Further, when a conventional permanent magnet rotor is used in the hermetic compressor and a balance weight such as a thin plate member 14 is added to correct imbalance, the hermetic compressor has a long overall length. , Miniaturization, reduction in the number of parts, and cost reduction are hindered. Further, the stator 6 of the electric motor in such a hermetic compressor includes:
As a refrigerant passage communicating from suction to discharge, a through groove 7 is formed on the outer periphery.
Is provided, the fixing of the stator 6 becomes unstable, which hinders noise and vibration reduction.
【0008】本発明はこのような従来の課題を解決する
ものであり、クランク軸の圧入または焼嵌め固定による
永久磁石の割れを防止し、信頼性に優れた永久磁石回転
子を提供し、またこれを用いて、小型、低コスト、低騒
音、低振動な密閉型圧縮機を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and provides a permanent magnet rotor which prevents permanent magnets from being cracked by press-fitting or shrink-fitting of a crankshaft and which is excellent in reliability. An object of the present invention is to provide a small-sized, low-cost, low-noise, low-vibration hermetic compressor using this.
【0009】[0009]
【課題を解決するための手段】上記課題を解決するため
に本発明は、永久磁石回転子の積層鉄板鉄心の中心に貫
通孔を設け、この貫通孔の近傍外周に逃げ部を設けた
り、またこの逃げ部を利用して、その永久磁石回転子を
用いた密閉型圧縮機の回転アンバランスを補正したり、
あるいは冷媒通路に逃げ部を利用するものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a through hole at the center of a laminated iron plate iron core of a permanent magnet rotor, and a relief portion at an outer periphery near the through hole. Utilizing this relief part, it corrects the rotational imbalance of the hermetic compressor using the permanent magnet rotor,
Alternatively, an escape portion is used in the refrigerant passage.
【0010】上記永久磁石回転子の積層鉄板鉄心の中心
の貫通孔近傍外周に逃げ部を設けることによって、積層
鉄板鉄心外周あるいは内部に設置した永久磁石の割れを
防止し、挿入性、信頼性に優れた永久磁石回転子が得ら
れ、またこの逃げ部を持つ永久磁石回転子を用いること
により、小型、低コスト、低騒音、低振動な密閉型圧縮
機が得られる。By providing a relief portion around the center of the laminated iron core of the permanent magnet rotor near the through hole, cracks of the permanent magnet installed on the outer periphery or inside of the laminated iron core are prevented, and insertability and reliability are improved. An excellent permanent magnet rotor can be obtained, and by using the permanent magnet rotor having the relief portion, a small-sized, low-cost, low-noise, low-vibration hermetic compressor can be obtained.
【0011】[0011]
【発明の実施の形態】請求項1記載の発明は、積層鉄板
鉄心の中心に貫通孔を設け、この貫通孔にクランク軸を
圧入または焼嵌め固定してなる電動機の永久磁石回転子
において、前記貫通孔の近傍に逃げ部を設けたものであ
る。そしてこの構成によれば、永久磁石回転子にクラン
ク軸を圧入または焼嵌め固定する際、積層鉄板鉄心の中
心に設けたクランク軸挿入用貫通孔の変形を積層鉄板鉄
心内部で回避し、積層鉄板鉄心外周あるいは内部に設置
した永久磁石の割れを防止し、挿入性、信頼性に優れる
永久磁石回転子が得られる。The invention according to claim 1 is a permanent magnet rotor for an electric motor in which a through-hole is provided at the center of a laminated iron core and a crankshaft is press-fitted or shrink-fitted into the through-hole. An escape portion is provided near the through hole. According to this configuration, when the crankshaft is press-fitted or shrink-fitted into the permanent magnet rotor, deformation of the crankshaft insertion through hole provided at the center of the laminated iron core is avoided inside the laminated iron core, and A permanent magnet rotor having excellent insertability and reliability can be obtained by preventing cracks of the permanent magnet installed on the outer periphery or inside of the iron core.
【0012】請求項2記載の発明は、請求項1記載の永
久磁石回転子で、逃げ部は前記貫通孔を取り巻く断面円
弧状の複数の逃げ孔からなるもので、この構成によれ
ば、積層鉄板鉄心内に効率的に逃げ部を配置でき、また
永久磁石全体に対して割れを防止でき、挿入性、信頼性
に優れる永久磁石回転子が得られる。According to a second aspect of the present invention, there is provided the permanent magnet rotor according to the first aspect, wherein the escape portion includes a plurality of escape holes having an arc-shaped cross section surrounding the through hole. The escape portion can be efficiently arranged in the iron plate iron core, and the entire permanent magnet can be prevented from cracking, so that a permanent magnet rotor excellent in insertability and reliability can be obtained.
【0013】請求項3記載の発明は、請求項1または2
記載の永久磁石回転子で、積層鉄板鉄心の外周に複数個
の弓状の永久磁石を配置し、その外周を非磁性金属管で
固定したもので、この構成によればクランク軸の圧入ま
たは焼嵌め固定時に、外周に配置された複数個の弓状磁
石が積層鉄板鉄心の変形により非磁性金属管に当たり割
れることを防止でき、挿入性、信頼性に優れる永久磁石
回転子が得られる。[0013] The invention according to claim 3 is the invention according to claim 1 or 2.
In the permanent magnet rotor described, a plurality of arcuate permanent magnets are arranged on the outer periphery of a laminated iron core, and the outer periphery is fixed by a non-magnetic metal tube. At the time of fitting and fixing, it is possible to prevent a plurality of bow-shaped magnets arranged on the outer periphery from hitting the non-magnetic metal tube due to deformation of the laminated iron plate core, and to obtain a permanent magnet rotor excellent in insertability and reliability.
【0014】請求項4記載の発明は、請求項1または2
記載の永久磁石回転子で、積層鉄板鉄心の内部に複数個
の弓状の永久磁石を配設したもので、この構成によれば
クランク軸の圧入または焼嵌め固定時に、積層鉄板鉄心
内部に配置された複数個の弓状の永久磁石が積層鉄板鉄
心の変形により割れることを防止でき、挿入性、信頼性
に優れる永久磁石回転子が得られる。The invention described in claim 4 is the first or second invention.
The permanent magnet rotor described in which a plurality of arcuate permanent magnets are disposed inside the laminated iron core. According to this configuration, when the crankshaft is press-fitted or shrink-fitted, it is disposed inside the laminated iron core. The plurality of arcuate permanent magnets can be prevented from being cracked due to deformation of the laminated iron core, and a permanent magnet rotor having excellent insertability and reliability can be obtained.
【0015】請求項5記載の発明は、請求項3記載の永
久磁石回転子で、円周方向から見て、複数の逃げ孔を、
複数の弓状の永久磁石の間に配置したもので、この構成
によればクランク軸の圧入または焼嵌め固定時に、外周
に配置された複数個の弓状の永久磁石の円周方向から見
た両端部が積層鉄板鉄心の変形により押されて、円周方
向から見た永久磁石の中心付近で非磁性金属管に当たり
割れることを確実に防止でき、挿入性、信頼性に優れる
永久磁石回転子が得られる。According to a fifth aspect of the present invention, there is provided the permanent magnet rotor according to the third aspect, wherein a plurality of relief holes are formed when viewed from a circumferential direction.
According to this configuration, when the crankshaft is press-fitted or shrink-fitted and fixed, the plurality of arcuate permanent magnets disposed on the outer periphery are viewed from the circumferential direction. Both ends can be reliably prevented from being pressed by the deformation of the laminated iron core and hitting the non-magnetic metal tube near the center of the permanent magnet as viewed from the circumferential direction, and a permanent magnet rotor with excellent insertability and reliability. can get.
【0016】請求項6記載の発明は、請求項4記載の永
久磁石回転子で、円周方向から見て、複数の逃げ孔を、
前記複数の弓状の永久磁石と同方向に配置したもので、
この構成によればクランク軸の圧入または焼嵌め固定時
に、積層鉄板鉄心内部に配置された複数個の弓状の永久
磁石の円周方向から見た中心付近が積層鉄板鉄心の変形
により押されて、円周方向から見た永久磁石の中心付近
が積層鉄板鉄心内部で割れることを確実に防止でき、挿
入性、信頼性に優れる永久磁石回転子が得られる。According to a sixth aspect of the present invention, there is provided the permanent magnet rotor according to the fourth aspect, wherein a plurality of relief holes are formed when viewed from a circumferential direction.
Which are arranged in the same direction as the plurality of arcuate permanent magnets,
According to this configuration, at the time of press-fitting or shrink-fitting of the crankshaft, the vicinity of the center of the plurality of arcuate permanent magnets arranged inside the laminated iron core viewed from the circumferential direction is pressed by the deformation of the laminated iron core. Further, the vicinity of the center of the permanent magnet viewed from the circumferential direction can be reliably prevented from being cracked inside the laminated iron core, and a permanent magnet rotor having excellent insertability and reliability can be obtained.
【0017】請求項7記載の発明は、請求項1〜6の何
れかに記載の永久磁石回転子で、プレス形成により鉄板
に複数の貫通した逃げ孔を設け、この鉄板を積層するこ
とにより積層鉄板鉄心としたものである。そしてこの構
成によれば、積層鉄板鉄心に前記貫通した逃げ孔を容易
に構成でき、また低コストで制作することができる。According to a seventh aspect of the present invention, there is provided the permanent magnet rotor according to any one of the first to sixth aspects, wherein a plurality of through holes are provided in the iron plate by press forming, and the iron plates are laminated. It is an iron plate iron core. According to this configuration, the penetrated escape hole can be easily formed in the laminated iron core, and can be manufactured at low cost.
【0018】請求項8記載の発明は、請求項1〜7の何
れかに記載の永久磁石回転子を扱った電動機を密閉容器
内に収納し、その密閉容器内に前記電動機の回転力を軸
受部材に支承されたクランク軸により伝達されて駆動す
る圧縮機構部を配設した密閉型圧縮機である。そしてこ
の構成によれば容易に圧縮機の電動機部を組み立てるこ
とができ、生産性に優れた密閉型圧縮機が得られる。According to an eighth aspect of the present invention, an electric motor handling the permanent magnet rotor according to any one of the first to seventh aspects is housed in a closed container, and the rotating force of the motor is bearing in the closed container. This is a hermetic compressor provided with a compression mechanism portion that is driven by being transmitted by a crankshaft supported by a member. According to this configuration, the motor section of the compressor can be easily assembled, and a hermetic compressor excellent in productivity can be obtained.
【0019】請求項9記載の発明は、請求項8記載の密
閉型圧縮機で、圧縮機構部の回転アンバランスを補正す
るべく、複数の貫通した逃げ孔の大きさを異ならせ、バ
ランス調整するように構成したものである。そしてこの
構成によれば、アンバランスを矯正するための薄板材な
どを廃止でき、小型化、部品点数の削減、コストダウン
などに優れた密閉型圧縮機を得ることができる。According to a ninth aspect of the present invention, in the hermetic compressor according to the eighth aspect, in order to correct the rotational imbalance of the compression mechanism, the size of the plurality of through holes is made different to adjust the balance. It is configured as follows. According to this configuration, a thin plate material for correcting imbalance can be eliminated, and a hermetic compressor excellent in miniaturization, reduction in the number of parts, cost reduction, and the like can be obtained.
【0020】請求項10記載の発明は、請求項8または
9記載の密閉型圧縮機で、圧縮機構部で圧縮する冷媒
を、永久磁石回転子の一方端面から他方端面に流通させ
る冷媒ガス経路を構成し、貫通した逃げ孔を前記ガス経
路の一部としたものである。そしてこの構成によれば、
密閉型圧縮機における電動機の固定子外周に、吸入口か
ら吐出口に連通する冷媒通路である貫通溝を設ける必要
が無く、固定子を円周方向のハウジング(胴シェル)に
密着して確実に固定できるため、低騒音、低振動な密閉
型圧縮機を得ることができる。According to a tenth aspect of the present invention, in the hermetic compressor according to the eighth or ninth aspect, a refrigerant gas path for flowing the refrigerant compressed by the compression mechanism from one end face to the other end face of the permanent magnet rotor is provided. In this case, the pierced escape hole is a part of the gas path. And according to this configuration,
There is no need to provide a through-groove, which is a refrigerant passage communicating from the suction port to the discharge port, on the outer periphery of the stator of the electric motor in the hermetic compressor, and the stator is securely attached to the circumferential housing (body shell). Because it can be fixed, a hermetic compressor with low noise and low vibration can be obtained.
【0021】[0021]
【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。なお図中、前記従来例と同一部材は同一符
号で示し、その詳細説明は省略する。 (実施例1)図1〜図4において、積層鉄板鉄心9には
中心にクランク軸を圧入または焼嵌め固定するするため
の貫通孔15があり、外周に弓状の永久磁石16を複数
個配置し、回転時の遠心力により磁石が飛散しないよう
に、また磁石粉などが回転子外部に極力漏れないように
回転子の外周部を非磁性金属管17で、また軸方向両端
面をプレート18で覆い、かしめピン19で一体化して
永久磁石回転子を構成している。Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same members as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. (Embodiment 1) In FIGS. 1 to 4, a laminated iron core 9 has a through hole 15 at its center for press-fitting or shrink-fitting a crankshaft, and a plurality of arc-shaped permanent magnets 16 are arranged on the outer periphery. In order to prevent the magnet from scattering due to the centrifugal force at the time of rotation, and to prevent magnet powder and the like from leaking outside the rotor as much as possible, the outer periphery of the rotor is made of a non-magnetic metal tube 17 and both end surfaces in the axial direction are made of plates 18. , And integrated with caulking pins 19 to form a permanent magnet rotor.
【0022】ここで、比較例1としての図3に示す永久
磁石回転子は、積層鉄板鉄心9の中心に設けられたクラ
ンク軸挿入用の貫通孔15が、圧入または焼嵌めによる
貫通孔15内面からの加熱により半径方向へ広がり、矢
印で示すような積層鉄板鉄心9の変形を起こし、外周に
配置した永久磁石16を圧迫し、非磁性金属管17と当
たり、図に示すような割れを起こしやすい。また、この
ような割れは、外周部に配置された弓状の永久磁石16
の円周方向から見た両端部の圧迫によるものが多い。Here, in the permanent magnet rotor shown in FIG. 3 as Comparative Example 1, the through hole 15 for inserting the crankshaft provided in the center of the laminated iron core 9 is formed by press-fitting or shrink fitting. Spreading in the radial direction by heating from above causes deformation of the laminated iron core 9 as shown by the arrow, compresses the permanent magnet 16 arranged on the outer periphery, hits the non-magnetic metal tube 17, and causes cracks as shown in the figure. Cheap. In addition, such cracks are caused by the arc-shaped permanent magnets 16 arranged on the outer peripheral portion.
Many are due to compression at both ends as viewed from the circumferential direction.
【0023】そこで、実施例1においては積層鉄板鉄心
9の中心に設けた貫通孔15の近傍で貫通孔15を取り
囲むように貫通した断面円弧状の複数の逃げ孔20を設
けている。これより図4に示すように、積層鉄板鉄心9
の中心に設けられた、クランク軸挿入用の貫通孔15の
圧入または焼嵌めによる貫通孔15内面からの加熱によ
る半径方向への広がりは、矢印で示すように積層鉄板鉄
心9の内部で吸収され、外周に配置された永久磁石16
への圧迫を回避することができる。特に、永久磁石16
が弓状の場合、この貫通した逃げ孔20を円周方向から
見て複数の永久磁石間に配置することにより、前述の回
避効果を確実なものとすることができる。なお、前記プ
レート18にも前記逃げ孔20に繋がる孔部18aなら
びに貫通孔15に繋がる孔部18bが形成されている。Therefore, in the first embodiment, a plurality of escape holes 20 having a circular arc cross section are provided so as to surround the through hole 15 near the through hole 15 provided at the center of the laminated iron core 9. From this, as shown in FIG.
The radial expansion due to heating from the inner surface of the through-hole 15 by press-fitting or shrink-fitting of the through-hole 15 for inserting a crankshaft provided at the center of the crankshaft is absorbed inside the laminated iron plate iron core 9 as shown by the arrow. , Permanent magnet 16 arranged on the outer periphery
Pressure can be avoided. In particular, the permanent magnet 16
In the case where is shaped like an arc, the above-described avoiding effect can be ensured by arranging the penetrated escape hole 20 between a plurality of permanent magnets when viewed from the circumferential direction. The plate 18 also has a hole 18a connected to the escape hole 20 and a hole 18b connected to the through hole 15.
【0024】(実施例2)図5〜図8において、積層鉄
板鉄心9は中心にクランク軸を圧入または焼嵌め固定す
るするための貫通孔15があり、積層鉄板鉄心9の内部
に弓状の永久磁石16を複数個配置し軸方向両端面をプ
レート18で覆い、かしめピン19で一体化して永久磁
石回転子を構成している。(Embodiment 2) In FIGS. 5 to 8, the laminated iron core 9 has a through hole 15 at the center for press-fitting or shrink-fitting the crankshaft. A plurality of permanent magnets 16 are arranged, both end surfaces in the axial direction are covered with a plate 18, and integrated with caulking pins 19 to constitute a permanent magnet rotor.
【0025】ここで、比較例2としての図7に示す永久
磁石回転子は、積層鉄板鉄心9の中心に設けられたクラ
ンク軸挿入用の貫通孔15が、圧入または焼嵌めによる
貫通孔15内面からの加熱により半径方向へ広がり、矢
印で示すような積層鉄板鉄心9の変形を起こし、内部に
配置した永久磁石16を圧迫し、図に示すような割れを
起こしやすい。また、このような割れは、内部に配置さ
れた弓状の永久磁石16の円周方向から見た中心付近の
圧迫によるものが多い。Here, in the permanent magnet rotor shown in FIG. 7 as Comparative Example 2, the through hole 15 for inserting the crankshaft provided at the center of the laminated iron plate iron core 9 is formed by press-fitting or shrink fitting. The steel sheet spreads in the radial direction due to heating from above, causing deformation of the laminated iron core 9 as shown by the arrow, pressing the permanent magnet 16 disposed inside, and easily causing cracks as shown in the figure. Such cracks are often caused by pressure near the center of the arcuate permanent magnet 16 disposed inside when viewed from the circumferential direction.
【0026】そこで、実施例2においては積層鉄板鉄心
9の中心に設けた貫通孔15の近傍で貫通孔15を取り
囲むように貫通した断面円弧状の複数の逃げ孔20を設
けている。これより図8に示すように、積層鉄板鉄心9
の中心に設けられた、クランク軸挿入用の貫通孔15の
圧入または焼嵌めによる貫通孔15内面からの加熱によ
る半径方向への広がりは、矢印で示すように積層鉄板鉄
心9の内部で吸収され、内部に配置された永久磁石16
への圧迫を回避することができる。特に、永久磁石16
が弓状の場合、この貫通した逃げ孔20を円周方向から
見て複数の永久磁石と同方向に配置することにより、前
述の回避効果を確実なものとすることができる。なお、
前記プレート18にも前記逃げ孔20に繋がる孔部18
aならびに貫通孔15に繋がる孔部18bが形成されて
いる。Therefore, in the second embodiment, a plurality of escape holes 20 having a circular arc cross section are provided so as to surround the through hole 15 near the through hole 15 provided at the center of the laminated iron core 9. From this, as shown in FIG.
The radial expansion due to heating from the inner surface of the through-hole 15 by press-fitting or shrink-fitting of the through-hole 15 for inserting a crankshaft provided at the center of the crankshaft is absorbed inside the laminated iron plate iron core 9 as shown by the arrow. , The permanent magnet 16 arranged inside
Pressure can be avoided. In particular, the permanent magnet 16
In the case where is shaped like an arc, the above-described avoiding effect can be ensured by arranging the penetrated escape holes 20 in the same direction as the plurality of permanent magnets when viewed from the circumferential direction. In addition,
The plate 18 also has a hole 18 connected to the escape hole 20.
a and a hole 18b connected to the through hole 15 are formed.
【0027】(実施例3)図9〜図11において、積層
鉄板鉄心9は中心にクランク軸12を圧入または焼嵌め
固定するするための貫通孔15があり、外周に弓状の永
久磁石16を複数個配置し、回転時の遠心力により磁石
が飛散しないように、また磁石粉などが回転子外部に極
力漏れないように回転子の外周部を非磁性金属管17
で、また軸方向両端面をプレート18で覆い、かしめピ
ン19で一体化して永久磁石回転子を構成している。(Embodiment 3) In FIGS. 9 to 11, the laminated iron core 9 has a through hole 15 for press-fitting or shrink-fitting the crankshaft 12 at the center, and an arc-shaped permanent magnet 16 on the outer periphery. The outer periphery of the rotor is provided with a non-magnetic metal tube 17 so that magnets are not scattered by centrifugal force during rotation and magnet powder and the like do not leak outside the rotor as much as possible.
Further, both ends in the axial direction are covered with a plate 18 and integrated with caulking pins 19 to constitute a permanent magnet rotor.
【0028】ここで、前記従来例で述べた図12に示す
密閉型圧縮機ではクランク軸は、圧縮機構部からの負荷
を受けて振れ回り運動を起こすため、アンバランスな状
態となり、通常これを避けるため回転子端面に薄板材な
どのバランスウェイトを付加して、バランス調整を行な
っていた。これに対し、本実施例3においては積層鉄板
鉄心9の中心に設けた貫通孔15の近傍で貫通孔15を
取り囲むように貫通した断面円弧状の複数の逃げ孔20
を設けるとともに、逃げ孔20の大きさをそれぞれ異な
らせるか、少なくとも1つの逃げ孔20の大きさを他の
逃げ孔20の大きさと異ならせることにより、バランス
調整している。そしてこの構成によれば、アンバランス
を矯正するための薄板材などを廃止でき、小型化、部品
点数の削減、コストダウンなどに優れた密閉型圧縮機を
得ることができる。なお、前記プレート18にも前記逃
げ孔20に繋がる孔部18aならびに貫通孔15に繋が
る孔部18bが形成されている。Here, in the hermetic compressor shown in FIG. 12 described in the above conventional example, the crankshaft undergoes a whirling motion under the load from the compression mechanism, so that the crankshaft is in an unbalanced state. To avoid this, a balance weight such as a thin plate was added to the rotor end face to adjust the balance. On the other hand, in the third embodiment, a plurality of escape holes 20 having an arcuate cross section penetrated so as to surround the through hole 15 near the through hole 15 provided at the center of the laminated iron core 9.
And the size of the escape holes 20 is made different from each other, or the size of at least one of the escape holes 20 is made different from the size of the other escape holes 20 to adjust the balance. According to this configuration, a thin plate material for correcting imbalance can be eliminated, and a hermetic compressor excellent in miniaturization, reduction in the number of parts, cost reduction, and the like can be obtained. The plate 18 also has a hole 18a connected to the escape hole 20 and a hole 18b connected to the through hole 15.
【0029】(実施例4)図11において、積層鉄板鉄
心9は中心にクランク軸12を圧入または焼嵌め固定す
るするための貫通孔15があり、外周に弓状の永久磁石
(図示せず)が複数個配置され、回転時の遠心力により
磁石が飛散しないように、また磁石粉などが回転子外部
に極力漏れないように回転子の外周部を非磁性金属管1
7と軸方向両端面をプレート18により覆い、かしめピ
ンで一体化して前記実施例3と同様の永久磁石回転子を
構成している。(Embodiment 4) In FIG. 11, the laminated iron core 9 has a through hole 15 for press-fitting or shrink-fitting the crankshaft 12 at the center, and a bow-shaped permanent magnet (not shown) on the outer periphery. The outer periphery of the rotor is made of a non-magnetic metal tube 1 so that magnets are not scattered due to centrifugal force at the time of rotation and magnet powder and the like do not leak outside the rotor as much as possible.
7 and both end surfaces in the axial direction are covered with a plate 18 and integrated with caulking pins to form a permanent magnet rotor similar to that of the third embodiment.
【0030】ここで、前記従来例で述べた図12に示す
密閉型圧縮機では、圧縮機の吸入口2から取り入れられ
た冷媒は圧縮機構部で圧縮吐出され、矢印で示すように
圧縮機構部外周付近に設けられた貫通孔5から駆動部で
ある電動機の固定子6の外周に設けられた貫通溝7を通
過し、ハウジング1の他端側の圧縮機吐出口8から吐き
出されるようになっている。Here, in the hermetic compressor shown in FIG. 12 described in the above conventional example, the refrigerant taken in from the suction port 2 of the compressor is compressed and discharged by the compression mechanism, and as shown by the arrow, the compression mechanism Through a through hole 5 provided in the vicinity of the outer periphery, it passes through a through groove 7 provided in the outer periphery of the stator 6 of the electric motor which is a driving portion, and is discharged from a compressor discharge port 8 on the other end side of the housing 1. ing.
【0031】そこで、実施例4においては、前述の圧縮
機構部で圧縮した冷媒を、永久磁石回転子の一方端面か
ら他方端面に流通させるべく前記貫通孔15の近傍で貫
通孔15を取り囲むように貫通した複数の逃げ孔20を
冷媒ガス経路の一部としている。なお、前記プレート1
8にも前記逃げ孔20に繋がる孔部18aならびに貫通
孔15に繋がる孔部18bが形成されている。そしてこ
の構成によれば、密閉型圧縮機における電動機の固定子
6の外周に、吸入口2から吐出口8に連通する冷媒通路
である貫通溝7を設ける必要が無く、固定子6を円周方
向のハウジング(胴シェル)1に密着して確実に固定で
きるため、低騒音、低振動な密閉型圧縮機を得ることが
できる。Therefore, in the fourth embodiment, the refrigerant compressed by the above-mentioned compression mechanism is formed so as to surround the through hole 15 near the through hole 15 so as to flow from one end face to the other end face of the permanent magnet rotor. The plurality of escape holes 20 penetrated form a part of the refrigerant gas path. The plate 1
8 also has a hole 18a connected to the relief hole 20 and a hole 18b connected to the through hole 15. According to this configuration, it is not necessary to provide a through groove 7 which is a refrigerant passage communicating from the suction port 2 to the discharge port 8 on the outer periphery of the stator 6 of the electric motor in the hermetic type compressor, and the stator 6 has a circumferential shape. Since it can be securely fixed in close contact with the housing (body shell) 1 in one direction, a hermetic compressor with low noise and low vibration can be obtained.
【0032】[0032]
【発明の効果】上記実施例から明らかなように、請求項
1記載の発明は、積層鉄板鉄心の中心に貫通孔を設け、
この貫通孔にクランク軸を圧入または焼嵌め固定する永
久磁石電動機の回転子において、前記貫通孔の近傍外周
に逃げ部を設けるもので、この構成によれば、永久磁石
回転子にクランク軸を圧入または焼嵌め固定する際、積
層鉄板鉄心の中心に設けたクランク軸挿入用貫通孔の変
形を積層鉄板鉄心内部で回避し、積層鉄板鉄心外周ある
いは内部に設置した永久磁石の割れを防止し、挿入性、
信頼性に優れる永久磁石回転子が得られる。As is apparent from the above embodiment, according to the first aspect of the present invention, a through-hole is provided at the center of the laminated iron sheet core,
In a rotor of a permanent magnet motor in which a crankshaft is press-fitted or shrink-fitted into this through-hole, a relief portion is provided on the outer periphery near the through-hole. According to this configuration, the crankshaft is press-fitted into the permanent magnet rotor. Or, when shrink-fitting and fixing, avoid deformation of the through hole for crankshaft insertion provided in the center of the laminated iron core inside the laminated iron core, prevent cracking of the permanent magnet installed on the outer periphery or inside the laminated iron core, and insert sex,
A highly reliable permanent magnet rotor can be obtained.
【0033】請求項2記載の発明は、請求項1記載の永
久磁石回転子で、逃げ部の形状が前記貫通孔を取り巻く
複数の円弧状の貫通孔(逃げ孔)からなるもので、この
構成によれば、積層鉄板鉄心内に効率的に逃げ部を配置
でき、また永久磁石全体に対して割れを防止でき、挿入
性、信頼性に優れる永久磁石回転子が得られる。請求項
3記載の発明は、請求項1または2記載の永久磁石回転
子で、前記積層鉄板鉄心の外周に複数個の弓状磁石を配
置し、その外周を非磁性金属管で固定したもので、この
構成によればクランク軸の圧入または焼嵌め固定時に、
外周に配置された複数個の弓状磁石が積層鉄板鉄心の変
形により非磁性金属管に当たり割れることを防止でき、
挿入性、信頼性に優れる永久磁石回転子が得られる。According to a second aspect of the present invention, there is provided the permanent magnet rotor according to the first aspect, wherein the shape of the relief portion is a plurality of arc-shaped through holes (release holes) surrounding the through hole. According to this, the escape portion can be efficiently arranged in the laminated iron plate iron core, cracks can be prevented for the entire permanent magnet, and a permanent magnet rotor excellent in insertability and reliability can be obtained. According to a third aspect of the present invention, there is provided the permanent magnet rotor according to the first or second aspect, wherein a plurality of bow-shaped magnets are arranged on the outer periphery of the laminated iron core, and the outer periphery is fixed by a non-magnetic metal tube. According to this configuration, at the time of press-fitting or shrink-fitting the crankshaft,
It is possible to prevent a plurality of bow-shaped magnets arranged on the outer circumference from hitting the non-magnetic metal tube by the deformation of the laminated iron core and cracking,
A permanent magnet rotor excellent in insertability and reliability can be obtained.
【0034】請求項4記載の発明は、請求項1または2
記載の永久磁石回転子で、積層鉄板鉄心の内部に複数個
の弓状の永久磁石を配設したもので、この構成によれば
クランク軸の圧入または焼嵌め固定時に、積層鉄板鉄心
内部に配置された複数個の弓状の永久磁石が積層鉄板鉄
心の変形により割れることを防止でき、挿入性、信頼性
に優れる永久磁石回転子が得られる。The invention according to claim 4 is the invention according to claim 1 or 2
The permanent magnet rotor described in which a plurality of arcuate permanent magnets are disposed inside the laminated iron core. According to this configuration, when the crankshaft is press-fitted or shrink-fitted, it is disposed inside the laminated iron core. The plurality of arcuate permanent magnets can be prevented from being cracked due to deformation of the laminated iron core, and a permanent magnet rotor having excellent insertability and reliability can be obtained.
【0035】請求項5記載の発明は、請求項3記載の永
久磁石回転子で、円周方向から見て、前記複数の貫通し
た逃げ孔を、前記複数の弓状磁石の間に配置したもの
で、この構成によればクランク軸の圧入または焼嵌め固
定時に、外周に配置された複数個の弓状磁石の円周方向
から見た両端部が積層鉄板鉄心の変形により押されて、
円周方向から見た永久磁石の中心付近で非磁性金属管に
当たり割れることを確実に防止でき、挿入性、信頼性に
優れる永久磁石回転子が得られる。According to a fifth aspect of the present invention, there is provided the permanent magnet rotor according to the third aspect, wherein the plurality of through holes are disposed between the plurality of arcuate magnets when viewed from a circumferential direction. According to this configuration, at the time of press-fitting or shrink-fitting of the crankshaft, both ends of the plurality of arcuate magnets arranged on the outer periphery viewed from the circumferential direction are pressed by deformation of the laminated iron plate core,
The non-magnetic metal tube can be reliably prevented from breaking near the center of the permanent magnet viewed from the circumferential direction, and a permanent magnet rotor excellent in insertability and reliability can be obtained.
【0036】請求項6記載の発明は、請求項4記載の永
久磁石回転子で、円周方向から見て、前記複数の貫通し
た逃げ孔を、前記複数の弓状磁石と同方向に配置したも
ので、この構成によればクランク軸の圧入または焼嵌め
固定時に、積層鉄板鉄心内部に配置された複数個の弓状
磁石の円周方向から見た中心付近が積層鉄板鉄心の変形
により押されて、円周方向から見た永久磁石の中心付近
が積層鉄板鉄心内部で割れることを確実に防止でき、挿
入性、信頼性に優れる永久磁石回転子が得られる。According to a sixth aspect of the present invention, in the permanent magnet rotor according to the fourth aspect, when viewed from the circumferential direction, the plurality of pierced relief holes are arranged in the same direction as the plurality of arcuate magnets. According to this configuration, at the time of press-fitting or shrink fitting of the crankshaft, the vicinity of the center as viewed from the circumferential direction of the plurality of bow-shaped magnets disposed inside the laminated iron core is pressed by deformation of the laminated iron core. Therefore, the vicinity of the center of the permanent magnet viewed from the circumferential direction can be reliably prevented from being cracked inside the laminated iron core, and a permanent magnet rotor having excellent insertability and reliability can be obtained.
【0037】請求項7記載の発明は、請求項1〜6の何
れかに記載の永久磁石回転子で、プレス形成により前記
複数の貫通した逃げ孔を設け、積層鉄板鉄心としたもの
で、この構成によれば、積層鉄板鉄心に前記貫通した逃
げ孔を容易に構成でき、また低コストで制作することが
できる。According to a seventh aspect of the present invention, there is provided the permanent magnet rotor according to any one of the first to sixth aspects, wherein the plurality of through holes are provided by press forming to form a laminated iron core. According to the configuration, the pierced relief hole can be easily formed in the laminated iron core, and can be manufactured at low cost.
【0038】請求項8記載の発明は、請求項1〜7の何
れかに記載の永久磁石回転子を扱った電動機を密閉容器
内に収納し、その密閉容器内に前記電動機の回転力を軸
受部材に支承されたクランク軸により伝達されて駆動す
る圧縮機構部を配設した密閉型圧縮機で、この構成によ
れば容易に圧縮機の電動機部を組み立てることができ、
生産性に優れた密閉型圧縮機が得られる。According to an eighth aspect of the present invention, an electric motor handling the permanent magnet rotor according to any one of the first to seventh aspects is housed in a closed container, and the rotational force of the motor is bearing in the closed container. This is a hermetic compressor provided with a compression mechanism that is driven by a crankshaft supported by a member. According to this configuration, the motor section of the compressor can be easily assembled,
A hermetic compressor with excellent productivity can be obtained.
【0039】請求項9記載の発明は、請求項8記載の密
閉型圧縮機で、前記圧縮機構部の回転アンバランスを補
正するように、前記複数の貫通した逃げ孔の大きさを異
ならせ、バランス調整したもので、この構成によれば、
アンバランスを矯正するための薄板版などを廃止でき、
小型化、部品点数の削減、コストダウンなどに優れた密
閉型圧縮機を得ることができる。According to a ninth aspect of the present invention, in the hermetic compressor according to the eighth aspect, the sizes of the plurality of through holes are varied so as to correct the rotational imbalance of the compression mechanism. With the balance adjusted, according to this configuration,
We can abolish thin plates to correct imbalance,
A hermetic compressor excellent in miniaturization, reduction in the number of parts, cost reduction, and the like can be obtained.
【0040】請求項10記載の発明は、請求項8または
9記載の密閉型圧縮機で、前記圧縮機構部で圧縮する冷
媒を、前記永久磁石回転子の一方端面から他方端面に流
通させる冷媒ガス経路を構成し、前記貫通した逃げ孔を
前記ガス経路の一部としたもので、この構成によれば、
密閉型圧縮機における電動機の固定子外周に、吸入から
吐出に連通する冷媒通路である貫通溝を設ける必要が無
く、固定子を円周方向のハウジング(胴シェル)に密着
して確実に固定できるため、低騒音、低振動な密閉型圧
縮機を得ることができる。According to a tenth aspect of the present invention, in the hermetic compressor according to the eighth or ninth aspect, the refrigerant gas for allowing the refrigerant compressed by the compression mechanism to flow from one end face to the other end face of the permanent magnet rotor. A gas path is formed, and the escape hole penetrated is made a part of the gas path. According to this structure,
There is no need to provide a through groove, which is a refrigerant passage communicating from suction to discharge, on the outer periphery of the stator of the electric motor in the hermetic compressor, and the stator can be securely fixed to the circumferential housing (body shell) in close contact. Therefore, a hermetic compressor with low noise and low vibration can be obtained.
【図1】本発明の実施例1に記載の永久磁石回転子の横
断面図FIG. 1 is a cross-sectional view of a permanent magnet rotor according to a first embodiment of the present invention.
【図2】図1のX−X断面図2 is a sectional view taken along line XX of FIG. 1
【図3】比較例1による積層鉄板鉄心の変形に伴う永久
磁石の割れ状態を示す横断面図FIG. 3 is a cross-sectional view showing a state in which a permanent magnet is cracked due to deformation of a laminated iron core according to Comparative Example 1.
【図4】本発明の実施例1に記載の永久磁石回転子の拡
大横断面図FIG. 4 is an enlarged cross-sectional view of the permanent magnet rotor according to the first embodiment of the present invention.
【図5】本発明の実施例2に記載の永久磁石回転子の横
断面図FIG. 5 is a cross-sectional view of the permanent magnet rotor according to the second embodiment of the present invention.
【図6】図5のY−Y断面図6 is a sectional view taken along line YY of FIG.
【図7】比較例2による積層鉄板鉄心の変形に伴う永久
磁石の割れ状態を示す横断面図FIG. 7 is a cross-sectional view showing a state of cracking of a permanent magnet due to deformation of a laminated iron core according to Comparative Example 2.
【図8】本発明の実施例2に記載の永久磁石回転子の拡
大横断面図FIG. 8 is an enlarged cross-sectional view of a permanent magnet rotor according to a second embodiment of the present invention.
【図9】本発明の実施例3に記載の永久磁石回転子の拡
大横断面図FIG. 9 is an enlarged cross-sectional view of a permanent magnet rotor according to a third embodiment of the present invention.
【図10】図9のZ−Z断面図10 is a sectional view taken along the line ZZ in FIG. 9.
【図11】本発明の実施例3に記載の永久磁石回転子を用
いた密閉型圧縮機の断面図FIG. 11 is a sectional view of a hermetic compressor using a permanent magnet rotor according to a third embodiment of the present invention.
【図12】従来の密閉型圧縮機の断面図FIG. 12 is a sectional view of a conventional hermetic compressor.
1 ハウジング 2 吸入口 6 固定子 8 吐出口 9 積層鉄板鉄心 12 クランク軸 15 貫通孔 16 永久磁石 17 非磁性金属管 18 プレート 18a,18b 孔部 19 かしめピン 20 逃げ孔 Reference Signs List 1 housing 2 suction port 6 stator 8 discharge port 9 laminated iron core 12 crankshaft 15 through hole 16 permanent magnet 17 nonmagnetic metal tube 18 plate 18a, 18b hole 19 caulking pin 20 escape hole
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) H02K 21/14 H02K 21/14 M Fターム(参考) 5H002 AA08 AB05 AB07 AC06 AE08 5H615 AA01 BB01 PP02 PP06 SS05 SS19 SS53 TT05 5H621 GA01 GA04 HH01 JK02 JK05 JK15 JK17 5H622 CA02 CA07 CA13 CB04 CB05 CB06 PP03 PP10 PP11 PP14 PP16 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) H02K 21/14 H02K 21/14 MF term (Reference) 5H002 AA08 AB05 AB07 AC06 AE08 5H615 AA01 BB01 PP02 PP06 SS05 SS19 SS53 TT05 5H621 GA01 GA04 HH01 JK02 JK05 JK15 JK17 5H622 CA02 CA07 CA13 CB04 CB05 CB06 PP03 PP10 PP11 PP14 PP16
Claims (10)
の貫通孔にクランク軸を圧入または焼嵌め固定してなる
電動機の永久磁石回転子において、前記貫通孔の近傍に
逃げ部を設けたことを特徴とする電動機の永久磁石回転
子。A through hole is provided at the center of a laminated iron core, and a relief portion is provided near the through hole in a permanent magnet rotor of an electric motor in which a crankshaft is press-fitted or shrink-fitted into the through hole. A permanent magnet rotor for a motor.
状の複数の逃げ孔からなることを特徴とする請求項1記
載の電動機の永久磁石回転子。2. The permanent magnet rotor for an electric motor according to claim 1, wherein the relief portion includes a plurality of relief holes having an arc-shaped cross section surrounding the through hole.
久磁石を配置し、その外周を非磁性金属管で固定したこ
とを特徴とする請求項1または2記載の電動機の永久磁
石回転子。3. The permanent magnet rotation of an electric motor according to claim 1, wherein a plurality of arc-shaped permanent magnets are arranged on the outer periphery of the laminated iron core, and the outer periphery is fixed by a non-magnetic metal tube. Child.
久磁石を配設したことを特徴とする請求項1または2記
載の電動機の永久磁石回転子。4. The permanent magnet rotor for an electric motor according to claim 1, wherein a plurality of arc-shaped permanent magnets are provided inside the laminated iron core.
数の弓状の永久磁石の間に配置したことを特徴とする請
求項3記載の電動機の永久磁石回転子。5. The permanent magnet rotor for an electric motor according to claim 3, wherein a plurality of relief holes are arranged between the plurality of arcuate permanent magnets when viewed from a circumferential direction.
記複数の弓状の永久磁石と同方向に配置したことを特徴
とする請求項4記載の電動機の永久磁石回転子。6. The permanent magnet rotor for an electric motor according to claim 4, wherein a plurality of relief holes are arranged in the same direction as the plurality of arcuate permanent magnets when viewed from a circumferential direction.
逃げ孔を設け、この鉄板を積層することにより積層鉄板
鉄心としたことを特徴とする請求項1または2または3
または4または5または6記載の電動機の永久磁石回転
子。7. The iron plate according to claim 1, wherein a plurality of piercing holes are formed in the iron plate by press forming, and the iron plates are laminated to form a laminated iron core.
Or the permanent magnet rotor of the electric motor of 4 or 5 or 6.
回転子を扱った電動機を密閉容器内に収納し、その密閉
容器内に前記電動機の回転力を軸受部材に支承されたク
ランク軸により伝達されて駆動する圧縮機構部を配設し
たことを特徴とする密閉型圧縮機。8. A crank, wherein the motor handling the permanent magnet rotor according to claim 1 is housed in a closed container, and the rotating force of the motor is supported by a bearing member in the closed container. A hermetic compressor characterized by having a compression mechanism portion driven by being transmitted by a shaft.
るべく、複数の貫通した逃げ孔の大きさを異ならせ、バ
ランス調整するように構成した請求項8記載の密閉型圧
縮機。9. The hermetic compressor according to claim 8, wherein the plurality of pierced relief holes are made different in size and the balance is adjusted in order to correct the rotational imbalance of the compression mechanism.
回転子の一方端面から他方端面に流通させる冷媒ガス経
路を構成し、貫通した逃げ孔を前記ガス経路の一部とし
た請求項8または9記載の密閉型圧縮機。10. A refrigerant gas path for allowing the refrigerant compressed by the compression mechanism to flow from one end face to the other end face of the permanent magnet rotor, and an escape hole penetrated as a part of the gas path. Or a hermetic compressor according to 9.
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JP36855399A JP3654806B2 (en) | 1999-12-27 | 1999-12-27 | Electric motor permanent magnet rotor and hermetic compressor using the same |
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Application Number | Priority Date | Filing Date | Title |
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JP36855399A JP3654806B2 (en) | 1999-12-27 | 1999-12-27 | Electric motor permanent magnet rotor and hermetic compressor using the same |
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