JPH0732548B2 - Electric motor for compressor - Google Patents
Electric motor for compressorInfo
- Publication number
- JPH0732548B2 JPH0732548B2 JP60285501A JP28550185A JPH0732548B2 JP H0732548 B2 JPH0732548 B2 JP H0732548B2 JP 60285501 A JP60285501 A JP 60285501A JP 28550185 A JP28550185 A JP 28550185A JP H0732548 B2 JPH0732548 B2 JP H0732548B2
- Authority
- JP
- Japan
- Prior art keywords
- stator
- contact surface
- passage portion
- fixing member
- compressor
- 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
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は圧縮機用電動機に係り、特に、ロータリ式圧縮
機に利用するのに好適な電動機固定子の構造改良に関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor for a compressor, and more particularly, to a structural improvement of an electric motor stator suitable for use in a rotary compressor.
一般に、前記圧縮機にあっては、電動機によって圧縮部
が駆動されると、流体を内部に吸い込んで圧縮し、かつ
電動機中を通って外部に吐出すように構成されている。Generally, in the compressor, when the compressor is driven by the electric motor, the fluid is sucked into the inside to be compressed, and the fluid is discharged through the electric motor to the outside.
このような電動機は、圧縮流体をスムースに流通させる
為に下記に述べる構造となっている。即ち、第５図及び
第６図に示されるように、電動機固定子１の外周には、
該固定子１を圧縮機フレーム２に嵌合固定したときに、
圧縮機フレーム２と接触しないよう軸方向に沿って平面
状に切欠いて非接触面３が形成され、駆動時、固定子１
と回転子（図示せず）との間から軸方向に圧縮流体を流
通させる他、前記非接触面３と圧縮機フレーム２との間
の空間部４より圧縮流体を流通させるようにしている。
また、固定子１の圧縮機フレーム２との接触面５がわに
は軸方向に貫通された丸孔６が円周方向に沿って複数設
けられ、該丸孔６からも圧縮流体を流通させるようにし
ている。Such an electric motor has a structure described below in order to smoothly circulate the compressed fluid. That is, as shown in FIGS. 5 and 6, on the outer periphery of the motor stator 1,
When the stator 1 is fitted and fixed to the compressor frame 2,
A non-contact surface 3 is formed in a flat shape along the axial direction so as not to contact the compressor frame 2, and a non-contact surface 3 is formed.
The compressed fluid is allowed to flow in the axial direction from between the rotor and a rotor (not shown), and the compressed fluid is allowed to flow from the space 4 between the non-contact surface 3 and the compressor frame 2.
Further, a plurality of circular holes 6 penetrating in the axial direction are provided in the contact surface 5 of the stator 1 with the compressor frame 2 along the circumferential direction, and the compressed fluid also flows from the circular holes 6. I am trying.
ところで、電動機は近年、圧縮機のコスト低減を図るた
め、小型化かつ高出力化することが要請され、出力に応
じて流体流通量を変える必要がある。By the way, in recent years, in order to reduce the cost of the compressor, the electric motor is required to be downsized and to have a high output, and it is necessary to change the fluid flow rate according to the output.
従って、高出力化する為、固定子１の非接触面３及び丸
孔６を大きくしなければならないがこれらの大きさには
小型化という点で制約を受ける。即ち、特に非接触面３
を大きくすると、それだけ接触面５が小さくなるので、
固定子１を圧縮機フレーム２に嵌合しても、圧縮機フレ
ーム２に対し固定子１を確実に固定することが難しく、
固定子１が落下するおそれがあり、しかも極部的に磁束
密度が高くなるので、特性に悪影響を及ぼし、そのた
め、小型化かつ高出力化を図り難い問題がある。Therefore, in order to increase the output, the non-contact surface 3 and the round hole 6 of the stator 1 must be enlarged, but these sizes are restricted in terms of downsizing. That is, especially the non-contact surface 3
The larger the value of, the smaller the contact surface 5, so
Even if the stator 1 is fitted to the compressor frame 2, it is difficult to securely fix the stator 1 to the compressor frame 2,
There is a risk that the stator 1 will fall, and the magnetic flux density will increase locally at the poles, which will adversely affect the characteristics, which makes it difficult to achieve miniaturization and high output.
本発明の目的は、前記従来技術の問題点に鑑み、固定子
が落下するのを防ぐと共に、特性に悪影響を与えること
がなく、以て小型化かつ高出力化を図り得る圧縮機用電
動機を提供することにある。In view of the above-mentioned problems of the prior art, an object of the present invention is to prevent a stator from falling and to prevent a characteristic from being adversely affected, thereby achieving a compact and high-output motor for a compressor. To provide.
本発明は、円筒状の固定部材と、前記固定部材の内面に
接触する円弧状に形成された接触面と前記固定部材の内
面に接触しなようほぼ平面状に切り欠いた非接触面とを
外周に設け該接触面を前記固定部材に嵌合して固定した
固定子とを備え、前記固定部材の内部において前記固定
子の軸方向に流体を通過する通路部が形成された圧縮機
用電動機において、前記固定子の全ての前記非接触面が
わにおいて流体を通過し得る軸方向に形成された第１の
前記通路部と、前記固定子の全ての前記接触面がわにお
いて流体を通過し得る軸方向に形成された第２の前記通
路部を備え、前記第１の通路部は前記固定部材の半径方
向より周方向の距離が長い断面形状であり、前記第２の
通路部はスロット歯の外部延長線上に形成され且つ円形
の断面形状であり、前記第１及び第２の通路部の各々は
固定子の中心に対する最短距離部分が該中心に対し同一
円周上に沿って配置されていることを特徴とし、この構
成により前記の目的を達成することができた。The present invention provides a cylindrical fixing member, an arc-shaped contact surface that contacts the inner surface of the fixing member, and a non-contact surface that is cut out in a substantially planar shape so as not to contact the inner surface of the fixing member. An electric motor for a compressor, comprising: a stator provided on an outer periphery, the contact surface being fitted and fixed to the fixing member, and a passage portion for passing a fluid in an axial direction of the stator is formed inside the fixing member. In the axially formed first passage portion through which all the non-contact surfaces of the stator can pass fluid in the saw, and all the contact surfaces of the stator pass fluid in the saw. The second passage portion is formed in the axial direction to obtain the first passage portion, and the first passage portion has a cross-sectional shape in which the distance in the circumferential direction is longer than the radial direction of the fixing member, and the second passage portion has slot teeth. Has a circular cross-section and is formed on the external extension line of Each of the first and second passage portions is characterized in that the shortest distance portion with respect to the center of the stator is arranged along the same circumference with respect to the center, and this configuration achieves the above object. I was able to.
以下、本発明の実施例を第１図乃至第４図について説明
する。第１図は本発明を適用した圧縮機を示す全体断面
図、第２図は圧縮機フレームに固定された固定子の平面
図、第３図は固定子の拡大平面図である。An embodiment of the present invention will be described below with reference to FIGS. 1 is an overall sectional view showing a compressor to which the present invention is applied, FIG. 2 is a plan view of a stator fixed to a compressor frame, and FIG. 3 is an enlarged plan view of the stator.
第１図に示す圧縮機は、電動機20によって圧縮部11が駆
動されると、該圧縮部11が冷媒ガス等の流体12を吸込口
13より内部に吸い込んで圧縮し、該圧縮流体12がベーン
14より圧縮部11外部へ放出されて電動機20を流通した
後、吐出口15より吐出されるようにしている。In the compressor shown in FIG. 1, when the compressor 20 is driven by the electric motor 20, the compressor 11 draws in a fluid 12 such as a refrigerant gas.
The compressed fluid 12 is sucked in from the inside and compressed, and the compressed fluid 12
After being discharged from the compression unit 11 to the outside of the compression unit 11 through the electric motor 20, it is discharged from the discharge port 15.
電動機20は、圧縮機フレーム16に嵌合かつ固定された固
定子21と、固定子21の内方に配置された回転子22と、回
転子22が一端部に装着されかつその他端部に圧縮部11が
連結された回転軸23とで構成されている。The electric motor 20 includes a stator 21 fitted and fixed to the compressor frame 16, a rotor 22 arranged inside the stator 21, a rotor 22 mounted at one end and compressed at the other end. And a rotary shaft 23 to which the portion 11 is connected.
そして前記固定子21は、第２図に示すように圧縮機フレ
ーム16に固定されたとき、圧縮機フレーム16と接触しな
いよう軸方向に沿って平面状に切欠かれた非接触面24
と、圧縮機フレーム16と接触する円弧状に形成された接
触面25とが外周に設けられている。When the stator 21 is fixed to the compressor frame 16 as shown in FIG. 2, the non-contact surface 24 is cut out in a planar shape along the axial direction so as not to contact the compressor frame 16.
And an arc-shaped contact surface 25 that contacts the compressor frame 16 are provided on the outer periphery.
そして、非接触面24がわには第２図、第３図に示すよう
に、流体12を通過させる第１の通路部26が形成されてい
る。第１の通路部26は非接触面24より内方位置に軸方向
に穿設された適宜数の孔からなっている。The non-contact surface 24 is provided with a first passage portion 26 for allowing the fluid 12 to pass therethrough, as shown in FIGS. 2 and 3. The first passage portion 26 is composed of an appropriate number of holes axially provided inward of the non-contact surface 24.
一方、接触面25がわには流体12を通過させる第２の通路
部27が形成されている。第２の通路部27は接触面25がわ
においてスロット歯28の外部延長線上に丸孔形状をなし
て軸方向に穿設されている。On the other hand, the contact surface 25 has a second passage portion 27 for allowing the fluid 12 to pass therethrough. The second passage portion 27 has a round hole shape and is axially bored on the outer extension line of the slot tooth 28 at the contact surface 25.
また、第１の通路部26及び第２の通路部27の各々は、コ
アバック寸法Ｒが全周に渡り略同じくなるようにする
為、内端縁が固定子21の同一半径位置に沿って配置され
ている。Further, the first passage portion 26 and the second passage portion 27 have inner end edges along the same radial position of the stator 21 so that the core back dimension R is substantially the same over the entire circumference. It is arranged.
実施例の固定子21は、上記の如く、非接触面24がわに第
１の通路部26が、かつ接触面25がわに第２の通路部27が
夫々形成されたので、これを有する電動機20によって圧
縮機の圧縮部11が駆動されると、圧縮された流体12が固
定子21及び回転子22間、固定子21の非接触面24及び圧縮
機フレーム16間を夫々流通するのみならず、第１の通路
部26並びに第２の通路部27をも流通させることができる
ので、電動機20引いては圧縮機の高出力化を図り得る。The stator 21 of the embodiment has the non-contact surface 24 and the first passage portion 26 formed therein and the contact surface 25 and the second passage portion 27 formed therein, respectively, as described above. When the compression unit 11 of the compressor is driven by the electric motor 20, if the compressed fluid 12 flows only between the stator 21 and the rotor 22, the non-contact surface 24 of the stator 21 and the compressor frame 16, respectively. In addition, since the first passage portion 26 and the second passage portion 27 can also be circulated, the output of the electric motor 20 and the compressor can be increased.
また、第１の通路部26の形成によって非接触面24の形状
を大きくすることが不要になるのでそれだけ接触面25の
形状が小さくなってしまうということを防ぎ、従って、
固定子21を圧縮機フレーム16に固定したとき、圧縮機フ
レーム16に対し接触面25を確りと嵌合でき、固定子21が
落下するおそれがない。しかも接触面25の圧縮機フレー
ム16への嵌合時、その嵌合力によって固定子21が変形す
るおそれがあるが、前述の如く第２の通路部27が丸孔形
状をなしていて、嵌合力を均等に合散させることができ
るので、固定子21が変形することがない。In addition, since it is not necessary to increase the shape of the non-contact surface 24 by forming the first passage portion 26, it is possible to prevent the shape of the contact surface 25 from being reduced by that much.
When the stator 21 is fixed to the compressor frame 16, the contact surface 25 can be fitted to the compressor frame 16 with certainty, and the stator 21 does not drop. Moreover, when the contact surface 25 is fitted to the compressor frame 16, the fitting force may deform the stator 21, but as described above, the second passage portion 27 has a round hole shape, and the fitting force is large. Can be evenly dispersed, so that the stator 21 is not deformed.
さらに、第２の通路部27がスロット歯28の外部延長線上
に設けられ、かつ第２及び第１の通路部26,27が固定子2
1の同一半径位置に沿って配置されているので、コアバ
ック寸法Ｒが全周に渡り略同じくなり、従って何れの極
部間の磁束密度を同程度にでき、極部的に磁束密度が高
くなるということを防げる。Further, the second passage portion 27 is provided on the external extension line of the slot tooth 28, and the second and first passage portions 26, 27 are provided in the stator 2.
Since they are arranged along the same radial position of 1, the core back dimension R is substantially the same over the entire circumference, so that the magnetic flux density between any poles can be made approximately the same, and the magnetic flux density is high at the poles. Can be prevented.
第４図は本発明の他の実施例を示している。この実施例
において、前記第１の実施例と異なるのは、固定子21の
非接触面24に第１の通路部29が形成された点にある。FIG. 4 shows another embodiment of the present invention. This embodiment differs from the first embodiment in that a first passage portion 29 is formed in the non-contact surface 24 of the stator 21.
即ち、第１の通路部29は、非接触面24に軸方向に沿って
凹ませた条溝からなっており、非接触面24の面積を増大
させるようにしている。その際、第１の通路部29の内端
縁は第２の通路部27の内端縁と共に、固定子21の同一半
径位置に沿って配置されている。That is, the first passage portion 29 is a groove formed by recessing the non-contact surface 24 along the axial direction, so that the area of the non-contact surface 24 is increased. At this time, the inner end edge of the first passage portion 29 and the inner end edge of the second passage portion 27 are arranged along the same radial position of the stator 21.
従って、この実施例によれば、非接触面24の幅を大きく
しなくとも、その面積を簡単に増大できるので、高出力
化でき、しかも接触面25の形状が小さくなることがない
ので、固定子21を圧縮機フレームに確りと固定しておく
ことができ、また非接触面24の面積を増大したにもかか
わらず極部的に磁束密度が高くなるということも防げ
る。Therefore, according to this embodiment, the area can be easily increased without increasing the width of the non-contact surface 24, so that the output can be increased and the shape of the contact surface 25 does not become small. The child 21 can be securely fixed to the compressor frame, and it is possible to prevent the magnetic flux density from increasing locally even though the area of the non-contact surface 24 is increased.
以上述べたように、本発明によれば、第２の通路部が丸
形形状をなしているので固定子接触面の圧縮機フレーム
への嵌合時にその嵌合力によって固定子が変形すること
がない。したがって固定子を固定部材に確実に固定でき
る効果がある。また第１の通路部の断面形状を前記固定
部材の半径方向より周方向の距離が長い断面形状として
いるので、流体の通路面積をより増大できる効果があ
る。更にコアバック寸法が略同じになるように構成した
ので特性に悪影響を与えることがない。これらにより小
型化かつ高出力化を図り得る圧縮機用電動機を提供する
ことができる。As described above, according to the present invention, since the second passage portion has the round shape, when the stator contact surface is fitted to the compressor frame, the fitting force may deform the stator. Absent. Therefore, there is an effect that the stator can be reliably fixed to the fixing member. Further, since the cross-sectional shape of the first passage portion is such that the distance in the circumferential direction of the fixing member is longer than the radial direction, there is an effect that the passage area of the fluid can be further increased. Furthermore, since the core back dimensions are substantially the same, the characteristics are not adversely affected. As a result, it is possible to provide a compressor electric motor that can be made compact and have high output.
第１図は本発明を圧縮機に適用した第１の実施例を示す
全体断面図、第２図は圧縮機フレームと固定子との固定
状態を示す横断面図、第３図は固定子の拡大平面図、第
４図は本発明の他の実施例を示す固定子の平面図、第５
図は固定子の従来の一例を示す平面図、第６図は固定子
の従来の他の例を示す平面図である。 16……圧縮機フレーム、20……電動機 21……固定子、24……非接触面 25……接触面、26,29……第１の通路部 27……第２の通路部、28……スロット歯FIG. 1 is an overall sectional view showing a first embodiment in which the present invention is applied to a compressor, FIG. 2 is a transverse sectional view showing a fixed state between a compressor frame and a stator, and FIG. 3 is a stator. FIG. 4 is an enlarged plan view, FIG. 4 is a plan view of a stator showing another embodiment of the present invention, and FIG.
FIG. 6 is a plan view showing an example of a conventional stator, and FIG. 6 is a plan view showing another example of a conventional stator. 16 ... Compressor frame, 20 ... motor 21 ... stator, 24 ... non-contact surface 25 ... contact surface, 26,29 ... first passage section 27 ... second passage section, 28 ... ... slot teeth
Claims (3)
面と前記固定部材の内面に接触しなようほぼ平面状に切
り欠いた非接触面とを外周に設け該接触面を前記固定部
材に嵌合して固定した固定子とを備え、 前記固定部材の内部において前記固定子の軸方向に流体
を通過する通路部が形成された圧縮機用電動機におい
て、 前記固定子の全ての前記非接触面がわにおいて流体を通
過し得る軸方向に形成された第１の前記通路部と、 前記固定子の全ての前記接触面がわにおいて流体を通過
し得る軸方向に形成された第２の前記通路部を備え、 前記第１の通路部は前記固定部材の半径方向より周方向
の距離が長い断面形状であり、 前記第２の通路部はスロット歯の外部延長線上に形成さ
れ且つ円形の断面形状であり、 前記第１及び第２の通路部の各々は固定子の中心に対す
る最短距離部分が該中心に対し同一円周上に沿って配置
されていることを特徴とする圧縮機用電動機。1. A cylindrical fixing member, an arc-shaped contact surface that contacts the inner surface of the fixing member, and a non-contact surface that is cut out in a substantially planar shape so as not to contact the inner surface of the fixing member. And a stator having the contact surface fitted and fixed to the fixing member, the inside of the fixing member having a passage portion for passing a fluid in the axial direction of the stator. In the electric motor, all the non-contact surfaces of the stator are axially formed so that the fluid can pass through the first passage portion, and all the contact surfaces of the stator pass through the fluid. And a second passage portion formed in an axial direction, wherein the first passage portion has a cross-sectional shape in which a circumferential distance is longer than a radial direction of the fixing member, and the second passage portion is a slot. Circular cross-sectional shape formed on the external extension line of the tooth There, each of the first and second passage portions compressor motor, characterized by being arranged along the same circumference shortest distance portion to said central with respect to the center of the stator.
前記非接触面に平行な面を有するほぼ台形状として形成
されたことを特徴とする特許請求の範囲第１項記載の圧
縮機用電動機。2. The first passage portion is formed inwardly of the non-contact surface, and has a substantially trapezoidal cross-sectional shape having a plane parallel to the non-contact surface. The electric motor for a compressor according to claim 1.
る特許請求の範囲第１項記載の圧縮機用電動機。3. The electric motor for a compressor according to claim 1, wherein the first passage portion is a groove formed along the non-contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285501A JPH0732548B2 (en) | 1985-12-20 | 1985-12-20 | Electric motor for compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285501A JPH0732548B2 (en) | 1985-12-20 | 1985-12-20 | Electric motor for compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62147924A JPS62147924A (en) | 1987-07-01 |
| JPH0732548B2 true JPH0732548B2 (en) | 1995-04-10 |
Family
ID=17692342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60285501A Expired - Lifetime JPH0732548B2 (en) | 1985-12-20 | 1985-12-20 | Electric motor for compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732548B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004201428A (en) | 2002-12-19 | 2004-07-15 | Matsushita Electric Ind Co Ltd | Motor |
| JP2009261058A (en) * | 2008-04-14 | 2009-11-05 | Panasonic Corp | Motor and electronic equipment using it |
| JP5042178B2 (en) * | 2008-09-22 | 2012-10-03 | 三菱電機株式会社 | Electric motor stator and electric motor and compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5980125A (en) * | 1982-10-29 | 1984-05-09 | Hitachi Ltd | Compressor |
| JPS5978848U (en) * | 1982-11-15 | 1984-05-28 | 三菱電機株式会社 | Frameless rotating machine |
| JPS59109237U (en) * | 1983-01-11 | 1984-07-23 | 三菱電機株式会社 | electric motor stator core |
-
1985
- 1985-12-20 JP JP60285501A patent/JPH0732548B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62147924A (en) | 1987-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |