JPH10127021A - Rotor for cage induction motor - Google Patents

Rotor for cage induction motor

Info

Publication number
JPH10127021A
JPH10127021A JP29117496A JP29117496A JPH10127021A JP H10127021 A JPH10127021 A JP H10127021A JP 29117496 A JP29117496 A JP 29117496A JP 29117496 A JP29117496 A JP 29117496A JP H10127021 A JPH10127021 A JP H10127021A
Authority
JP
Japan
Prior art keywords
cage
induction motor
type induction
core
motor rotor
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
Application number
JP29117496A
Other languages
Japanese (ja)
Other versions
JP3701412B2 (en
Inventor
Hiroshi Yokota
洋 横田
Toru Go
徹 呉
Shuhei Nakahama
修平 中浜
Noboru Aoki
登 青木
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP29117496A priority Critical patent/JP3701412B2/en
Publication of JPH10127021A publication Critical patent/JPH10127021A/en
Application granted granted Critical
Publication of JP3701412B2 publication Critical patent/JP3701412B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Manufacture Of Motors, Generators (AREA)
  • Induction Machinery (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a rotor for a cage induction motor which can be rotated as fast as a solid rotor and has a small eddy current loss on its surface. SOLUTION: A rotor for a cage induction motor has a core section 11 which is made by stacking inorganic insulating coating-covered nickel steel plates or low alloy steel thin plate rings and then forming many slots. A shaft 12 made of nickel steel or low alloy steel is inserted into a central hole of the core section 11 and conductor bars which has nearly the same length as the length in the axial direction of the core section or has nearly the same length as the one equal to the length in the axial direction of the core section plus the thickness of an end ring are inserted into the slots. Then, the end rings are set on both sides of the core section and are integrated into one body with the core section by a diffusion junction which is performed by hot isotropic pressing.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は籠型誘導電動機用ロ
ータに関し、特に高速回転用籠型誘導電動機に好適な籠
型誘導電動機用ロータに関するものである。
The present invention relates to a rotor for a cage-type induction motor, and more particularly to a rotor for a cage-type induction motor suitable for a cage-type induction motor for high-speed rotation.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来の
籠型誘導電動機用ロータは、コア部に珪素鋼板リングを
積層してなる積層構造体を用いている。しかしながらリ
ングの積層構造体であるため高速回転用の電動機では内
周にかかる回転応力が大きく、高速回転には適用できな
かった。
2. Description of the Related Art A conventional cage-type induction motor rotor uses a laminated structure in which a silicon steel ring is laminated on a core portion. However, since it is a laminated structure of rings, a high-speed rotation electric motor has a large rotational stress applied to the inner periphery and cannot be applied to high-speed rotation.

【0003】一方、高速回転用籠型誘導電動機のロータ
として、ソリッドロータも製造されている。しかしなが
ら、このソリッドロータはソリッドのためロータ表面で
の渦電流損が大きく、効率が通常のものよりかなり低い
という問題があった。
On the other hand, a solid rotor is also manufactured as a rotor of a cage type induction motor for high-speed rotation. However, this solid rotor has a problem that the eddy current loss on the rotor surface is large due to the solid, and the efficiency is considerably lower than that of a normal rotor.

【0004】また、珪素鋼板リングを積層してなるコア
部と軸の熱間等方加圧による拡散接合も考えられるが、
通常の珪素鋼板では、無機・有機混合系の絶縁膜で被覆
されているため、熱間等方加圧時にカプセルの中にガス
が発生してしまい、外圧が製品に充分に伝わらず接合不
良となるという問題があった。
[0004] Diffusion bonding by hot isostatic pressing of a core and a shaft formed by stacking silicon steel rings is also conceivable.
Since ordinary silicon steel sheets are covered with an inorganic / organic mixed insulating film, gas is generated in the capsule during hot isostatic pressing, and the external pressure is not sufficiently transmitted to the product, resulting in poor bonding. There was a problem of becoming.

【0005】また、珪素鋼に含まれる珪素、アルミニウ
ム等は非常に酸化しやすく、簡単に酸化被膜を表面に形
成して、拡散接合を阻み、充分な接合強度が得られない
という問題があった。
Further, silicon, aluminum and the like contained in silicon steel are very easily oxidized, and there is a problem that an oxide film is easily formed on the surface to prevent diffusion bonding, and that sufficient bonding strength cannot be obtained. .

【0006】また、珪素鋼板では熱間等加圧時に高温に
熱せられるため、結晶粒が粗大化して強度が低下するた
め、高速回転には強度的に充分でないという問題もあっ
た。
In addition, since a silicon steel sheet is heated to a high temperature during hot pressing or the like, the crystal grains are coarsened and the strength is reduced, so that there is a problem that the strength is not sufficient for high-speed rotation.

【0007】本発明は上述の点に鑑みてなされたもの
で、上記問題点を除去し、ソリッドロータ並の高速回転
が可能で、且つロータ表面での渦電流損の小さい籠型誘
導電動機用ロータを提供することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and eliminates the above-mentioned problems. The rotor for a cage-type induction motor can rotate at the same high speed as a solid rotor and has a small eddy current loss on the rotor surface. The purpose is to provide.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するため
請求項1に記載の発明は籠型誘導電動機用ロータを、無
機系絶縁被覆を施したニッケル鋼又は低合金鋼薄板リン
グを積層し且つ多数のスロット穴が形成されたコア部を
具備し、該コア部の中央穴にニッケル鋼又は低合金鋼か
らなる軸を挿入すると共に、スロット穴にコア部の軸方
向の長さと略同じ長さの導体バーを挿入し、更にコア部
の両側にエンドリングを嵌合し、熱間等方加圧により拡
散接合して一体化した構成とした。
According to a first aspect of the present invention, a rotor for a cage type induction motor is formed by laminating a nickel steel or low alloy steel thin plate ring provided with an inorganic insulating coating. A core portion having a number of slot holes formed therein, a shaft made of nickel steel or low alloy steel is inserted into a central hole of the core portion, and a length substantially equal to the axial length of the core portion is inserted into the slot hole. , And end rings were fitted on both sides of the core portion, and diffusion bonding was performed by hot isostatic pressing to form an integrated structure.

【0009】また、請求項2に記載の発明は籠型誘導電
動機用ロータを、無機系絶縁被覆を施したニッケル鋼又
は低合金鋼薄板リングを積層し且つ多数のスロット穴が
形成されたコア部を具備し、該コア部の中央穴にニッケ
ル鋼又は低合金鋼からなる軸を挿入し、該コア部の両側
に前記スロット穴と同形状で同数の穴を形成したエンド
リングを嵌合し、該スロット穴とエンドリング穴にコア
部の軸方向の長さにエンドリングの厚さを加えた長さと
略同じ長さの導体バーを挿入し、熱間等方加圧により拡
散接合して一体化した構成とした。
According to a second aspect of the present invention, there is provided a rotor for a cage-type induction motor, wherein a core portion formed by laminating a nickel or low alloy steel thin plate ring coated with an inorganic insulating coating and having a large number of slot holes formed therein. A shaft made of nickel steel or low alloy steel is inserted into the center hole of the core portion, and an end ring formed with the same number of holes in the same shape as the slot hole is fitted on both sides of the core portion, Insert a conductor bar of approximately the same length as the axial length of the core part plus the thickness of the end ring into the slot hole and end ring hole, and perform diffusion bonding by hot isostatic pressing to integrally form Configuration.

【0010】また、請求項3に記載の発明は請求項1又
は2に記載の籠型誘導電動機用ロータにおいて、エンド
リングの軸方向両外側に補強用のエンドリング押えを密
着嵌合したことを特徴とする。
According to a third aspect of the present invention, there is provided the cage-type induction motor rotor according to the first or second aspect, wherein reinforcing end ring retainers are closely fitted to both axially outer sides of the end ring. Features.

【0011】また、請求項4に記載の発明は請求項1又
は2に記載の籠型誘導電動機用ロータにおいて、エンド
リングの軸方向両外側に補強用のエンドリング押えを嵌
合し、熱間等方加圧により拡散接合して一体化したこと
を特徴とする。
According to a fourth aspect of the present invention, there is provided a rotor for a cage type induction motor according to the first or second aspect, wherein reinforcing end ring retainers are fitted on both outer sides of the end ring in the axial direction, thereby providing a hot work. It is characterized by being integrated by diffusion bonding by isotropic pressing.

【0012】また、請求項5に記載の発明は請求項1乃
至4のいずれか1つに記載の籠型誘導電動機用ロータに
おいて、軸の外周の前記コア部が挿入される部分に軸方
向に凹状溝を形成しておき、熱間等方加圧により該コア
部が該凹状溝を埋めて一体化したことを特徴とする。
According to a fifth aspect of the present invention, there is provided a cage-type induction motor rotor according to any one of the first to fourth aspects, wherein a portion of the outer periphery of the shaft into which the core portion is inserted is inserted in the axial direction. A concave groove is formed, and the core portion fills the concave groove and is integrated by hot isostatic pressing.

【0013】また、請求項6に記載の発明は請求項1乃
至5のいずれか1つに記載の籠型誘導電動機用ロータに
おいて、熱間等方加圧により一体化した籠型誘導電動機
用ロータを熱処理してその機械的性質を改善したことを
特徴とする。
According to a sixth aspect of the present invention, there is provided a rotor for a cage type induction motor according to any one of the first to fifth aspects, wherein the rotor for the cage type induction motor is integrated by hot isostatic pressing. Is characterized by improving its mechanical properties by heat treatment.

【0014】[0014]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図1は請求項1に記載の発明に係
る籠型誘導電動機用ロータの構造を示す図である。本籠
型誘導電動機用ロータ10は図示するように、多数のス
ロット穴が形成されたコア部11と、スロット穴に挿入
された導体バー13と、コア部11の中央穴に嵌挿され
た軸12と、コア部11の両側に嵌合させたエンドリン
グ14,14とからなる。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the structure of a cage type induction motor rotor according to the first aspect of the present invention. As shown, the main cage type induction motor rotor 10 includes a core portion 11 having a large number of slot holes, a conductor bar 13 inserted into the slot hole, and a shaft inserted into a central hole of the core portion 11. 12 and end rings 14, 14 fitted on both sides of the core 11.

【0015】コア部11は無機系絶縁被覆を施したニッ
ケル鋼又は低合金鋼薄板リングを積層した構造であり、
軸方向に多数のスロット穴が形成されている。軸12は
コア部11を構成するリング材と同質のニッケル鋼又は
低合金鋼からなる。また、スロット穴に挿入される導体
バー13及びエンドリング14,14は銅材からなり、
導体バー13の長さはコア部11の軸方向の長さと略等
しい。
The core portion 11 has a structure in which nickel steel or low alloy steel thin plate rings provided with an inorganic insulating coating are laminated.
Many slot holes are formed in the axial direction. The shaft 12 is made of nickel steel or low alloy steel of the same quality as the ring material constituting the core portion 11. Also, the conductor bar 13 and the end rings 14, 14 inserted into the slot holes are made of copper material,
The length of the conductor bar 13 is substantially equal to the length of the core 11 in the axial direction.

【0016】コア部11の中央穴に軸12を挿入すると
共に、スロット穴に導体バー13を挿入し、更にコア部
11の両側にエンドリング14,14を嵌合し、熱間等
方加圧により拡散接合してコア部11と軸12とエンド
リング14,14とを一体化する。
The shaft 12 is inserted into the center hole of the core 11, the conductor bar 13 is inserted into the slot hole, and the end rings 14 are fitted on both sides of the core 11, and hot isostatic pressing is performed. To integrate the core 11, the shaft 12 and the end rings 14, 14.

【0017】図2は請求項1に記載の発明に係る籠型誘
導電動機用ロータの構造を示す図である。本籠型誘導電
動機用ロータ10が図1に示す籠型誘導電動機用ロータ
と異なる点はエンドリング14,14にコア部11のス
ロット穴と同形状で同数の穴を形成し、コア部11の軸
方向の長さにエンドリング14,14の厚さを加えた長
さに略等しい長さの導体バー13をスロット穴とエンド
リング14,14の穴に挿入した点である。
FIG. 2 is a view showing the structure of the cage type induction motor rotor according to the first aspect of the present invention. The main difference between the cage type induction motor rotor 10 and the cage type induction motor rotor shown in FIG. 1 is that the end rings 14, 14 are formed with the same number of holes as the slot holes of the core portion 11 and have the same number of holes. The point is that the conductor bar 13 having a length substantially equal to the length obtained by adding the thickness of the end rings 14 and 14 to the axial length is inserted into the slot holes and the holes of the end rings 14 and 14.

【0018】図3及び図4は請求項4に記載の発明に係
る籠型誘導電動機用ロータの構造を示す図である。図3
に示す籠型誘導電動機用ロータはコア部11のスロット
穴にコア部11の軸方向の長さと同じ長さの導体バー1
3を挿入し、コア部11の両側にエンドリング14,1
4を嵌合し、該エンドリング14,14の外側にインコ
ンネル718材からなるエンドリング押え15,15を
嵌合し、この状態で熱間等方加圧により拡散接合してコ
ア部11と軸12とエンドリング14,14とエンドリ
ング押え15,15とを一体化した構造である。
FIGS. 3 and 4 show the structure of the cage type induction motor rotor according to the fourth aspect of the present invention. FIG.
The cage type induction motor rotor shown in FIG. 1 has a conductor bar 1 having the same length as the axial length of the core portion 11 in the slot hole of the core portion 11.
3 and insert the end rings 14, 1 on both sides of the core 11.
4 and the end rings 14 and 14 are fitted with end ring retainers 15 and 15 made of an Inconnel 718 material. 12 and end rings 14 and 14 and end ring retainers 15 and 15 are integrated.

【0019】また、図4に示す籠型誘導電動機用ロータ
10はエンドリング14,14にコア部11のスロット
穴と同形状で同数の穴を形成し、コア部11の軸方向の
長さにエンドリング14,14の厚さを加えた長さに略
等しい長さの導体バー13をスロット穴とエンドリング
14,14の穴に挿入し、該エンドリング14,14の
外側にインコンネル718材からなるエンドリング押え
15,15を嵌合し、この状態で熱間等方加圧により拡
散接合してコア部11と軸12とエンドリング14,1
4とエンドリング押え15,15とを一体化した構造で
ある。
The rotor 10 for a cage-type induction motor shown in FIG. 4 has the same number and shape of holes as the slot holes of the core portion 11 in the end rings 14, 14. A conductor bar 13 having a length substantially equal to the length obtained by adding the thickness of the end rings 14 and 14 is inserted into the slot hole and the holes of the end rings 14 and 14, and the outside of the end rings 14 and 14 is formed from the Inconnel 718 material. The end ring retainers 15, 15 are fitted together, and in this state, diffusion bonding is performed by hot isostatic pressing to form the core 11, the shaft 12, and the end rings 14, 1.
4 and an end ring presser 15, 15.

【0020】なお、上記例では図3及び図4に示す籠型
誘導電動機用ロータ10において、エンドリング押え1
5,15を嵌合した後、熱間等方加圧により拡散接合し
て一体化したが、エンドリング14,14を嵌合させた
後、熱間等方加圧により拡散接合して一体化し、その後
エンドリング14,14の外側に補強用のエンドリング
押え15,15を例えば焼き等により密着嵌合させても
よい(請求項3に記載の発明の実施形態例)。
In the above example, the end ring presser 1 in the cage-type induction motor rotor 10 shown in FIGS.
After the fitting of the end rings 14 and 14, they are integrated by diffusion bonding by hot isostatic pressing. Then, reinforcing end ring retainers 15, 15 may be closely fitted to the outside of the end rings 14, 14 by, for example, baking (an embodiment of the invention according to claim 3).

【0021】図5は請求項5に記載の発明に係る籠型誘
導電動機用ロータの製造方法を示す図である。図5
(a)に示すように、軸12の外周のコア部11が挿入
される部分に軸方向に凹状溝12aを形成しておき、こ
の軸12にコア部11、エンドリング14,14及びエ
ンドリング押え15,15を嵌合して、熱間等方加圧す
ることにより、コア部11が該凹状溝12aを埋め(1
1aの部分)一体化したものである。
FIG. 5 is a diagram showing a method of manufacturing a rotor for a cage type induction motor according to the present invention. FIG.
As shown in (a), a concave groove 12a is formed in a portion of the outer periphery of the shaft 12 where the core portion 11 is inserted, and the core portion 11, the end rings 14, 14 and the end ring are formed in the shaft 12. When the pressers 15 and 15 are fitted and hot isostatic pressing is performed, the core portion 11 fills the concave groove 12a (1).
1a) integrated.

【0022】上記のように熱間等方加圧により拡散接合
して一体化した後、籠型誘導電動機用ロータ10を焼き
入れ、焼き戻し等の熱処理を行ないその機械的性質を改
善する(請求項6に記載の発明の実施形態例)。
After diffusion bonding by hot isostatic pressing and integration as described above, the cage-type induction motor rotor 10 is quenched and heat-treated such as tempering to improve its mechanical properties. Embodiment of the invention described in Item 6).

【0023】上記無機系絶縁被覆を施したニッケル鋼又
は低合金鋼薄板は珪素鋼薄板に比較し、少し磁性特性が
悪く、従来のソリッドロータを構成する材料(例えば、
マルテンサイト鋼)並である。しかしながら、コア部1
1を構成する薄板の各々の接触は無機絶縁膜を介してい
るため、熱間等方加圧後も絶縁性が保たれて、ソリッド
ロータで問題となる表面渦電流損は小さく抑えられる。
The nickel steel or low alloy steel sheet provided with the above-mentioned inorganic insulating coating has a slightly lower magnetic property than the silicon steel sheet, and the material constituting the conventional solid rotor (for example,
Martensitic steel). However, core 1
Since the contact of each of the thin plates constituting 1 is through the inorganic insulating film, the insulating property is maintained even after hot isostatic pressing, and the surface eddy current loss which is a problem in the solid rotor can be suppressed to a small value.

【0024】また、軸12とコア部11を構成する薄板
リング及びエンドリング14,14は熱間等方加圧によ
り拡散接合されるため、ソリッドロータと同じように、
回転応力を大きく低減することができ、高速回転にも充
分耐えることができる。
Further, since the thin plate ring and the end rings 14 constituting the shaft 12 and the core portion 11 are diffusion-bonded by hot isostatic pressing, like the solid rotor,
Rotational stress can be greatly reduced, and it can withstand high-speed rotation.

【0025】また、コア部11の材料には拡散接合を阻
害するような酸化被膜を形成しやすい合金元素が殆ど含
まれていないため、充分な接合強度が得られる。また、
熱処理によりマルテンサイト化することができるため、
熱間等方加圧で材料が軟化しても、焼き入れ、焼き戻し
等の後熱処理により機械的性質を改善し、高強度化で
き、より高い応力に耐えうるようになる。例えば、9%
Ni鋼同士を1000℃、1500kgf/cm2の熱
間等方加圧で拡散接合した後、焼き入れ、焼き戻しした
材料で、接合強度約760Mpa、母材強度830Mp
aが得られた。
Further, since the material of the core portion 11 hardly contains an alloy element which easily forms an oxide film which inhibits diffusion bonding, sufficient bonding strength can be obtained. Also,
Since it can be converted to martensite by heat treatment,
Even if the material is softened by hot isostatic pressing, the mechanical properties can be improved by post heat treatment such as quenching and tempering, the strength can be increased, and higher stress can be tolerated. For example, 9%
Ni steels were diffusion bonded by hot isostatic pressing at 1500 ° C. and 1500 kgf / cm 2 , and then quenched and tempered. The bonding strength was about 760 Mpa and the base metal strength was 830 Mp.
a was obtained.

【0026】また、軸12のコア部11の挿入部に凹状
溝11aを形成して熱間等方加圧を施すことにより、コ
ア部11が該凹状溝11aを埋めるように形成して一体
化するため、積層体であるコア部11との剪断強度を高
めることもできる。
Further, by forming a concave groove 11a in the insertion portion of the core portion 11 of the shaft 12 and applying hot isostatic pressing, the core portion 11 is formed so as to fill the concave groove 11a and integrated. Therefore, the shear strength with the core portion 11 that is a laminate can be increased.

【0027】エンドリング押え15,15には、強度の
低いエンドリング14,14を補強するものであるか
ら、非磁性体で高強度のステンレス、高合金鋼、ニッケ
ル基合金等が用いられる。エンドリング押え15,15
は通常リングの焼き嵌め構造となるが、インコネル71
8材等の0.2%耐力が900MPaを越える高強度材
料を用いることにより、高速回転まで応力に耐える構造
にできる。
The end ring retainers 15, 15 are used to reinforce the low strength end rings 14, 14, and are made of non-magnetic, high-strength stainless steel, high alloy steel, nickel-based alloy, or the like. End ring retainer 15, 15
Is usually a shrink fit structure of the ring, but the Inconel 71
By using a high-strength material such as eight materials having a 0.2% proof stress exceeding 900 MPa, a structure that can withstand stress up to high-speed rotation can be obtained.

【0028】また、銅の融点1080℃より高温に加熱
できないため、軸12の材料とエンドリング押え15,
15の材料との間では充分な拡散接合強度を示さない
が、熱間等方加圧で一体化することも可能である。
Further, since the copper cannot be heated to a temperature higher than the melting point of 1080 ° C., the material of the shaft 12 and the end ring holder 15,
It does not exhibit sufficient diffusion bonding strength with the fifteen materials, but can be integrated by hot isostatic pressing.

【0029】[0029]

【発明の効果】以上説明したように本願各請求項に記載
の発明によれば下記のような優れた効果が得られる。 (1)請求項1又は請求項2に記載の発明によれば、コ
ア部を無機系絶縁被覆を施したニッケル鋼又は低合金鋼
薄板リングを積層した構造とするので、熱間等方加圧に
より拡散接合して高強度に一体化することができ、高速
回転が可能で、且つ表面渦電流損を大幅に低減できる籠
型誘導電動機用ロータを提供できる。
As described above, according to the invention described in each claim of the present application, the following excellent effects can be obtained. (1) According to the first or second aspect of the present invention, since the core portion has a structure in which nickel steel or low alloy steel thin plate rings coated with an inorganic insulating coating are laminated, hot isostatic pressing is performed. Thus, it is possible to provide a cage-type induction motor rotor that can be integrated with high strength by diffusion bonding, can rotate at high speed, and can greatly reduce surface eddy current loss.

【0030】(2)請求項3又は請求項4に記載の発明
によればエンドリングの軸方向両外側に補強用のエンド
リング押えを密着嵌合するか又は熱間等方加圧により拡
散接合して一体化するので、高速回転まで応力に耐えう
る構造となる。
(2) According to the third or fourth aspect of the present invention, a reinforcing end ring presser is tightly fitted to both ends of the end ring in the axial direction, or diffusion bonding is performed by hot isostatic pressing. And integrated, so that the structure can withstand stress up to high-speed rotation.

【0031】(3)請求項5に記載の発明によれば、軸
の外周のコア部が挿入される部分に軸方向に凹状溝を形
成しておき、熱間等方加圧により該コア部が該凹状溝を
埋めて一体化するので、コア部との剪断強度が高くな
り、より高速回転まで応力に耐えうる構造となる。
(3) According to the fifth aspect of the present invention, a concave groove is formed in the axial direction at a portion of the outer periphery of the shaft where the core is inserted, and the core is formed by hot isostatic pressing. Are integrated by filling the concave grooves, the shear strength with the core part is increased, and a structure that can withstand stress up to higher speed rotation is obtained.

【0032】(4)請求項6に記載の発明によれば、熱
間等方加圧により一体化した籠型誘導電動機用ロータを
熱処理してその機械的性質を改質するので、熱間等方加
圧で材料が軟化しても高強度化され、より高い応力に耐
えうるようになる。
(4) According to the sixth aspect of the present invention, since the cage-type induction motor rotor integrated by hot isostatic pressing is heat-treated to improve its mechanical properties, Even if the material is softened by the one-side pressing, the strength is increased, and the material can withstand higher stress.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本願発明の籠型誘導電動機用ロータの構造例を
示す図である。
FIG. 1 is a diagram showing a structural example of a cage type induction motor rotor of the present invention.

【図2】本願発明の籠型誘導電動機用ロータの構造例を
示す図である。
FIG. 2 is a view showing a structural example of a cage type induction motor rotor of the present invention.

【図3】本願発明の籠型誘導電動機用ロータの構造例を
示す図である。
FIG. 3 is a view showing a structural example of a cage type induction motor rotor of the present invention.

【図4】本願発明の籠型誘導電動機用ロータの構造例を
示す図である。
FIG. 4 is a diagram showing a structural example of a cage type induction motor rotor according to the present invention.

【図5】本願発明の籠型誘導電動機用ロータの製造工程
例を示す図である。
FIG. 5 is a diagram illustrating an example of a manufacturing process of the cage type induction motor rotor of the present invention.

【符号の説明】[Explanation of symbols]

10 籠型誘導電動機用ロータ 11 コア部 12 軸 13 導体バー 14 エンドリング 15 エンドリング押え DESCRIPTION OF SYMBOLS 10 Rotor for cage induction motors 11 Core part 12 Axis 13 Conductor bar 14 End ring 15 End ring holder

───────────────────────────────────────────────────── フロントページの続き (72)発明者 青木 登 神奈川県藤沢市本藤沢4丁目2番1号 株 式会社荏原総合研究所内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noboru Aoki 4-2-1 Motofujisawa, Fujisawa-shi, Kanagawa Prefecture Ebara Research Institute Co., Ltd.

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 無機系絶縁被覆を施したニッケル鋼又は
低合金鋼薄板リングを積層し且つ多数のスロット穴が形
成されたコア部を具備し、該コア部の中央穴にニッケル
鋼又は低合金鋼からなる軸を挿入すると共に、スロット
穴にコア部の軸方向の長さと略同じ長さの導体バーを挿
入し、更にコア部の両側にエンドリングを嵌合し、熱間
等方加圧により拡散接合して一体化したことを特徴とす
る籠型誘導電動機用ロータ。
1. A core having a plurality of slot holes formed by laminating a nickel steel or low alloy steel thin plate ring provided with an inorganic insulating coating, and a nickel steel or a low alloy alloy in a central hole of the core. Insert a shaft made of steel, insert a conductor bar of approximately the same length as the axial length of the core into the slot hole, fit end rings on both sides of the core, and hot isostatically press A cage-type induction motor rotor characterized by being integrated by diffusion bonding with a rotor.
【請求項2】 無機系絶縁被覆を施したニッケル鋼又は
低合金鋼薄板リングを積層し且つ多数のスロット穴が形
成されたコア部を具備し、該コア部の中央穴にニッケル
鋼又は低合金鋼からなる軸を挿入し、該コア部の両側に
前記スロット穴と同形状で同数の穴を形成したエンドリ
ングを嵌合し、該スロット穴とエンドリング穴にコア部
の軸方向の長さにエンドリングの厚さを加えた長さと略
同じ長さの導体バーを挿入し、熱間等方加圧により拡散
接合して一体化したことを特徴とする籠型誘導電動機用
ロータ。
2. A core having a plurality of slot holes formed by laminating a nickel or low alloy steel thin plate ring provided with an inorganic insulating coating, and a nickel or low alloy alloy in a central hole of the core. A shaft made of steel is inserted, an end ring having the same shape and the same number of holes as the slot holes is formed on both sides of the core portion, and the axial length of the core portion is inserted into the slot holes and the end ring holes. A cage-type induction motor rotor characterized in that a conductor bar having a length substantially equal to the length obtained by adding the thickness of the end ring is inserted into the cage, and the conductor bars are integrated by diffusion bonding by hot isostatic pressing.
【請求項3】 前記請求項1又は2に記載の籠型誘導電
動機用ロータにおいて、 前記エンドリングの軸方向両外側に補強用のエンドリン
グ押えを密着嵌合したことを特徴とする請求項1又は2
に記載の籠型誘導電動機用ロータ。
3. The cage-type induction motor rotor according to claim 1, wherein a reinforcing end ring presser is closely fitted to both ends of the end ring in the axial direction. Or 2
4. The cage-type induction motor rotor according to item 1.
【請求項4】 前記請求項1又は2に記載の籠型誘導電
動機用ロータにおいて、 前記エンドリングの軸方向両外側に補強用のエンドリン
グ押えを嵌合し、熱間等方加圧により拡散接合して一体
化したことを特徴とする籠型誘導電動機用ロータ。
4. The cage-type induction motor rotor according to claim 1, wherein reinforcing end ring pressers are fitted on both outer sides of the end ring in the axial direction, and the end ring is diffused by hot isostatic pressing. A cage type induction motor rotor characterized by being joined and integrated.
【請求項5】 前記請求項1乃至4のいずれか1つに記
載の籠型誘導電動機用ロータにおいて、 前記軸の外周の前記コア部が挿入される部分に軸方向に
凹状溝を形成しておき、前記熱間等方加圧により該コア
部が該凹状溝を埋めて一体化したことを特徴とする籠型
誘導電動機用ロータ。
5. The cage-type induction motor rotor according to claim 1, wherein a concave groove is formed in an axial direction in a portion of the outer periphery of the shaft where the core portion is inserted. A rotor for a cage-type induction motor, wherein said core portion is integrated by filling said concave groove by said hot isostatic pressing.
【請求項6】 前記請求項1乃至5のいずれか1つに記
載の籠型誘導電動機用ロータにおいて、 前記熱間等方加圧により一体化した籠型誘導電動機用ロ
ータを熱処理してその機械的性質を改善したことを特徴
とする籠型誘導電動機用ロータ。
6. The cage-type induction motor rotor according to claim 1, wherein the cage-type induction motor rotor integrated by hot isostatic pressing is heat-treated. For cage-type induction motors, characterized by improved mechanical properties.
JP29117496A 1996-10-14 1996-10-14 Rotor for vertical induction motor Expired - Fee Related JP3701412B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29117496A JP3701412B2 (en) 1996-10-14 1996-10-14 Rotor for vertical induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29117496A JP3701412B2 (en) 1996-10-14 1996-10-14 Rotor for vertical induction motor

Publications (2)

Publication Number Publication Date
JPH10127021A true JPH10127021A (en) 1998-05-15
JP3701412B2 JP3701412B2 (en) 2005-09-28

Family

ID=17765419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29117496A Expired - Fee Related JP3701412B2 (en) 1996-10-14 1996-10-14 Rotor for vertical induction motor

Country Status (1)

Country Link
JP (1) JP3701412B2 (en)

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CN102801267A (en) * 2011-05-27 2012-11-28 上海品星防爆电机有限公司 High-speed motor with solid rotor
JP2016220404A (en) * 2015-05-20 2016-12-22 東芝三菱電機産業システム株式会社 Squirrel-cage induction motor, squirrel-cage induction motor rotor and rotor manufacturing method
CN113241919A (en) * 2021-05-27 2021-08-10 江苏大学 Bearing-free composite rotor cage type asynchronous motor
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008503197A (en) * 2004-06-15 2008-01-31 シーメンス インダストリアル ターボマシナリー ベーヴェー Rotor for electric motor and manufacturing method thereof
JP2007202235A (en) * 2006-01-24 2007-08-09 Yaskawa Electric Corp Squirrel-cage rotor and electric motor using the same
JP2009112102A (en) * 2007-10-29 2009-05-21 Ebara Corp Rotating apparatus
JP4659811B2 (en) * 2007-10-29 2011-03-30 株式会社荏原製作所 Rotating device
JP2009195914A (en) * 2008-02-19 2009-09-03 Mazda Motor Corp Method for producing molding die, and molding die
CN102801267A (en) * 2011-05-27 2012-11-28 上海品星防爆电机有限公司 High-speed motor with solid rotor
JP2016220404A (en) * 2015-05-20 2016-12-22 東芝三菱電機産業システム株式会社 Squirrel-cage induction motor, squirrel-cage induction motor rotor and rotor manufacturing method
CN113241919A (en) * 2021-05-27 2021-08-10 江苏大学 Bearing-free composite rotor cage type asynchronous motor
CN114825833A (en) * 2022-06-29 2022-07-29 常州市常华电机有限公司 Rotor assembly of single-phase capacitor motor, processing equipment and processing method thereof
CN114825833B (en) * 2022-06-29 2022-09-02 常州市常华电机有限公司 Rotor assembly of single-phase capacitor motor, processing equipment and processing method thereof

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