JPS6028739A

JPS6028739A - Liquid-sealed motor

Info

Publication number: JPS6028739A
Application number: JP13976383A
Authority: JP
Inventors: Kiyonori Tokumitsu; 徳光　清典
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1983-07-28
Filing date: 1983-07-28
Publication date: 1985-02-13

Abstract

PURPOSE:To limit the pressure rise around a stator and to enable to reduce the quantity of insulating oil by providing pressure regulating members coupled with a frame in a can, and disposing a metal block between the members. CONSTITUTION:When insulating oil B around a stator 2 largely expands due to temperature rise, the expansion of the volume is released through the hole of a case 25 into the case 25, and an elastic material in the case 25 is inwardly compressed. Thus, the pressure difference between the interior and the exterior of the can 3 is almost eliminated. Since a metal block 33 is disposed between the cases 25 and a space between the cases 25 is buried in the block 33, the quantity of insulating oil B can be reduced.

Description

【発明の詳細な説明】この発明は、回転子の周囲に潤滑油、固定子の周囲に絶
縁油が封入されだ液封形態動機の改良に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a liquid-sealed motor in which lubricating oil is sealed around the rotor and insulating oil is sealed around the stator.

従来一般に知られているこの種の装置を第１図で説明す
る。図において、（１）は筒状のフレーム、（２）はこ
のフレーム（１）の内周に固定された固定子、（３）は
この固定子（２）の内周に配置された筒状のキャン、（
４）及び（５）はこのキャン（３）と上記フレーム（１
）の両端に夫々水密に結合された上部鍔及び下部鍔、（
６）及び（７）はこの上部鍔（４）及び下部鍔（５）に
夫々水密に結合された上部ブラケット及び下部ブラケッ
ト、（８）及び（９）はこの上部ブラケット（６）及び
下部ブラケット（７）に夫々嵌合された上部軸受及び下
部軸受、０（］及び０ηはこの上部軸受（８）及び下部
軸受（９）に夫々の両端に　かって上記上部ブラケット
（６）及び下部ブラケット（７）に夫々形成された上部
連通溝及び下部連通溝であり、下部連通溝Ｑｌ）は上記
上部ブラケット（７）を貫通して形成されている。（６
）は上記上部軸受（８）と下部軸受（９）に支承された
回転子、Ｑ）は上記上部ブラケット（６）に配置され上
記回転子（６）の軸σくを封止する軸封装置、ＱＦｊは
上記下部ブラケット（７）に一端が結合されると共に両
端が筒状に形成され、中央に壁部ＯＱが形成されたスラ
ストケースで１上記壁部ＯＱには両端側に貫通する連通
穴αηが形成されている。（至）はと記壁部ＯＱに支承
され上記軸α荀のスラスト荷重を受圧するスラスト軸受
、０りは上記スラストケース０つの他端に水密に嵌合さ
れたダイヤフラムで、上記連通穴ａカ、連通溝０υを介
してキャン（３）内の潤滑油（４）の圧力を調整してい
る。（１）は上部ブラケット（６）に水密に結合され固
定子（２）に通電する給電ケーブルである。なお、固定
子（２）の周囲には絶縁油の）が封入されている。A conventionally known device of this kind will be explained with reference to FIG. In the figure, (1) is a cylindrical frame, (2) is a stator fixed to the inner periphery of this frame (1), and (3) is a cylindrical frame arranged on the inner periphery of this stator (2). Can, (
4) and (5) are this can (3) and the above frame (1)
) upper and lower tsuba watertightly connected to both ends of (
6) and (7) are an upper bracket and a lower bracket that are watertightly connected to the upper tsuba (4) and lower tsuba (5), respectively, and (8) and (9) are the upper bracket (6) and the lower bracket ( The upper and lower bearings 0(] and 0η fitted into the upper and lower bearings (7), respectively, are connected to the upper and lower brackets (6) and (7) at both ends of the upper and lower bearings (8) and (9), respectively. An upper communication groove and a lower communication groove are respectively formed in the upper bracket (7), and the lower communication groove (Ql) is formed to pass through the upper bracket (7). (6
) is a rotor supported by the upper bearing (8) and lower bearing (9), Q) is a shaft sealing device disposed on the upper bracket (6) and sealing the shaft of the rotor (6). , QFj is a thrust case whose one end is connected to the lower bracket (7) and whose both ends are formed into a cylindrical shape, with a wall OQ formed in the center.1 The wall OQ has a communication hole penetrating through both ends. αη is formed. (To) A thrust bearing is supported on the wall part OQ and receives the thrust load of the shaft α. , the pressure of the lubricating oil (4) in the can (3) is adjusted via the communication groove 0υ. (1) is a power supply cable that is watertightly coupled to the upper bracket (6) and supplies electricity to the stator (2). Note that insulating oil () is sealed around the stator (2).

上記のように構成されたものにおいて、給電ケーブル翰
より固定子（２）に通電され、回転子（イ）が回転し、
軸０４１に連結されたポンプ（図示せず以下同様）等が
駆動されることは周知のとおりである。In the device configured as above, the stator (2) is energized from the power supply cable, the rotor (A) rotates,
As is well known, a pump (not shown, hereinafter the same) connected to the shaft 041 is driven.

ここで、運転にともない固定子（２）及び回転子０２の
温度が上昇すると潤滑油（イ）及び絶縁油（６）に体積
膨張が発生することになる。この体積膨張が発生すると
、絶縁油［Ｆ］）はフレーム（１）、キャン（３）、上
部鍔（４）、及び上部鍔（５）の結合部が溶接により結
合されているため、確実に密封され、外部に洩出するこ
とが防止されている。ところが、潤滑油囚の方は、軸α
４が上部ブラケット（６）を貫通しているため、軸封装
置（ト）が配置されているものの、洩出が発生しようと
する。ところが、スラストケース００にダイヤフラムＯ
Ｉが水密に結合されているため、潤滑油（ト）の体積膨
張は連通溝０］）、連通穴αηを介し、ダイヤフラムＯ
Ｉの変位によって吸収され、潤滑油（４）の圧力上昇、
即ち回転子０２の周囲の圧力上昇が抑制されることにな
る。Here, when the temperatures of the stator (2) and rotor 02 rise with operation, volumetric expansion occurs in the lubricating oil (a) and the insulating oil (6). When this volumetric expansion occurs, the insulating oil [F]) will be reliably removed because the joints of the frame (1), can (3), upper collar (4), and upper collar (5) are joined by welding. It is sealed and prevented from leaking outside. However, for those who are addicted to lubricating oil, the axis α
4 passes through the upper bracket (6), leakage is likely to occur even though the shaft sealing device (g) is in place. However, the diaphragm O in the thrust case 00
Since I is watertightly connected, the volume expansion of the lubricating oil (G) is caused by the diaphragm O through the communication groove 0]) and the communication hole αη.
The pressure increase in the lubricating oil (4), which is absorbed by the displacement of I,
In other words, the increase in pressure around the rotor 02 is suppressed.

ところで、この装置を高圧力、高温度の雰囲気中で使用
した場合には、潤滑油（８）と絶縁油（Ｂ）の体積膨張
が極めて大となり、特に絶縁油の）は、フレーム（１）
、キャン（３）、上部鍔（４）、上部鍔（５）により完
全に封止されているため、固定子（２）の周囲の圧力が
高圧力となる。By the way, when this device is used in an atmosphere of high pressure and high temperature, the volumetric expansion of the lubricating oil (8) and the insulating oil (B) becomes extremely large.
, the can (3), the upper flange (4), and the upper flange (5), so the pressure around the stator (2) becomes high.

この結果、薄板で構成されているキャン（３）に、高圧
力が加わり、キャン（３）が回転子（６）側に変形する
ことになり、キャン（３）が回転子０埠を拘束したり、
また、キャン（３）と上部鍔（４）又は上部鍔（５）と
の結合部が破損する等、重大事故を誘発する恐れがある
という欠点を有していた。As a result, high pressure is applied to the can (3), which is made of a thin plate, and the can (3) deforms toward the rotor (6), causing the can (3) to restrain the rotor 0. Or,
Further, there is a drawback that there is a risk of causing a serious accident, such as damage to the joint between the can (3) and the upper flange (4) or the upper flange (5).

この発明は以上の欠点を解消するためになされたもので
、端板又はフレームに設けられ回転子の周囲又はフレー
ム外に連通する連通穴、フレームとキャン内で端板又は
フレームに結合されフレームとキャン内を連通穴に連通
ずる室と固定子の周囲と連通ずる室とに仕切る弾性体を
有する圧力調整部材、及びこの圧力調整部材の相互間に
配置され端板又はフレームに結合された金属製ブロック
を備えることにより、固定子の周囲の圧力上昇を制限で
き、しかも圧力調整部材の空間をブロックで埋めること
ができ、絶縁油の油量も減少でき、絶縁油自体の体積膨
張も抑制できる液封形電動機をｔ１％供することを目的
としている。This invention has been made to solve the above-mentioned drawbacks, and includes a communication hole provided in the end plate or frame that communicates with the periphery of the rotor or outside the frame, and a communication hole that is connected to the end plate or frame within the can and the frame. A pressure adjusting member having an elastic body that partitions the inside of the can into a chamber communicating with the communication hole and a chamber communicating with the periphery of the stator, and a metal member disposed between the pressure adjusting members and coupled to the end plate or frame. By providing blocks, the pressure increase around the stator can be restricted, and the space in the pressure adjustment member can be filled with blocks, the amount of insulating oil can be reduced, and the volumetric expansion of the insulating oil itself can be suppressed. The purpose is to provide a sealed motor with t1%.

以下、この発明の一実施例を第２図ないし第４図で説明
する。図において、シ１）は下部ブラケット（７）を軸
方向に貫通する連通穴で、一方はスラストケースＯＱの
一端側の筒部に）内の塞りに連通している。■は上記上
部鍔（５）を軸方向に貫通して上記連通穴（ハ）に連通
ずる連通穴、（ハ）は上記連通穴（ハ）に連通ずる連通
穴（１）を有し上記連通穴（ハ）に螺合された取付部勾
と、この取付部（ハ）に結合され上記フレーム（１）と
上記キャン（３）との間で軸方向に配置され固定子（２
）側に開口部＠を有した筒部（ト）とを有するケース、
（８０はこの筒部翰内で上記取付部勾に水密に結合され
、上記連通穴（ト）に連通ずる室（８）を形成し一端が
閉塞された筒状の弾性体である。なお、ケース（ロ）と
弾性体（８１）で圧力調整部材を構成している。An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. In the figure, 1) is a communication hole that passes through the lower bracket (7) in the axial direction, and one of the holes communicates with a plug in the cylindrical portion at one end of the thrust case OQ. (3) has a communication hole that passes through the upper collar (5) in the axial direction and communicates with the communication hole (C); (C) has a communication hole (1) that communicates with the communication hole (C); A mounting portion screwed into the hole (C), and a stator (2) connected to the mounting portion (C) and arranged in the axial direction between the frame (1) and the can (3).
) A case having a cylindrical part (G) with an opening @ on the side,
(80 is a cylindrical elastic body that is watertightly connected to the mounting part in this cylindrical part, forms a chamber (8) that communicates with the communication hole (g), and has one end closed. The case (b) and the elastic body (81) constitute a pressure adjustment member.

（８Ｂ）はケース（ハ）の相互間に配置され上記上部鍔
（５）にねじ（８◇で固定された複数個の金属製のブロ
ックで、円弧状断面の支柱（８〕と足部（８のとで構成
されている。(8B) is a plurality of metal blocks placed between the cases (C) and fixed to the upper flange (5) with screws (8◇). It consists of 8 parts.

上記のように構成されたものにおいては、固定子（２）
の周囲の絶縁油の）が温度上昇により大きく体積膨張し
た場合には、その体積膨張分はケースに）の開口部＠を
介してケースに）内へと逃げることになり、弾性体（３
１）を内側に圧縮する。ところで、弾性体（８１）の室
（８２）内は連通穴ａｎ　ｈ　ｍ　、室＠、連通溝０υ
を介して回転子（ハ）の周囲と連通しているため、弾性
体（８１）は固定子（２）の周囲の圧力と回転子０カの
周囲の圧力とが略同等となるまで圧縮される。このため
、キャン（３）の内外の圧力差が殆どなくなり、キャン
（３）の回転子ａカ側への変形が阻止されている。In the structure configured as above, the stator (2)
When the volume of the insulating oil around the case expands significantly due to a rise in temperature, the volumetric expansion will escape into the case through the opening of the case, causing the elastic body to
1) Compress inward. By the way, the inside of the chamber (82) of the elastic body (81) has a communication hole an h m , a chamber @, and a communication groove 0υ
Since the elastic body (81) is in communication with the surroundings of the rotor (C) through the stator (2), it is compressed until the pressure around the stator (2) and the pressure around the rotor (0) become approximately equal. Ru. Therefore, the pressure difference between the inside and outside of the can (3) is almost eliminated, and deformation of the can (3) toward the rotor a side is prevented.

ここで、弾性体（８１）は圧縮時には軸方向と径方向と
の双方で収縮することになり、例えば径方向に湾曲しよ
うとするが、ケースυで囲まれているため、弾性体（８
１）の伸縮によって弾性体（３１）がキャン（３）に直
接接触することが防がれている。Here, when the elastic body (81) is compressed, it contracts in both the axial direction and the radial direction, and for example, it tries to curve in the radial direction, but since it is surrounded by the case υ, the elastic body (81)
1) prevents the elastic body (31) from directly contacting the can (3).

一方、ケース（支）の相互間にはブロック（３３）が配
置されているため、ケース＠の相互間のスペースがブロ
ック（財）で埋められることになり、絶縁油の）の油量
は減少できる。On the other hand, since blocks (33) are placed between the cases (supports), the space between the cases is filled with blocks (goods), and the amount of insulating oil decreases. can.

第４図は他の実施例を示すもので、連通穴（ハ）はフレ
ーム（１）の外側に連通しているので、固定子（２）の
周囲はフレーム（１）外と等圧になり、同様の効果を奏
する。Figure 4 shows another embodiment, in which the communication hole (c) communicates with the outside of the frame (1), so the pressure around the stator (2) is equal to the outside of the frame (1). , has the same effect.

ところで、圧力調整部材を下部鍔（５）に結合したもの
で説明したが、フレーム（１）に圧力調整部材を配置し
たものでもよく、この場合にはブロックもフレーム（１
）に結合されることになる。By the way, although the pressure adjustment member is connected to the lower flange (5) in the explanation, the pressure adjustment member may be arranged on the frame (1). In this case, the block is also connected to the frame (1).
) will be combined with

また更に、ブロック（財）は中空で構成されたものでも
同様の効果を奏するものであり、この場合には、装置の
重量を軽減できることになる。Furthermore, the same effect can be achieved even if the blocks are hollow, and in this case, the weight of the device can be reduced.

以上のようにこの発明は、端板又はフレームに設けられ
回転子の周囲又はフレーム外に連通ずる連通穴、フレー
ムとキャン内で端板又はフレームに結合されフレームと
キャン内を連通穴に連通する室と固定子の周囲と連通ず
る室とに仕切る弾性体を有する圧力調整部材、伎びこの
圧力調整部材の相互間に配置され端板又はフレームに結
合された金属製ブロックを備えたので、圧力調整部材で
固定子の周囲の圧力上昇を制限できるばかりでなく、ブ
ロックにより圧力調整部材相互間を埋めることができ絶
縁油量を減少でき、絶縁油自体の体積膨張をも抑制でき
る効果がある。As described above, the present invention provides a communication hole provided in an end plate or frame that communicates with the periphery of the rotor or the outside of the frame, and a communication hole that is connected to the end plate or frame within the frame and can and communicates between the frame and the can. A pressure adjusting member having an elastic body that partitions the chamber and a chamber communicating with the surroundings of the stator, and a metal block placed between the pressure adjusting members and connected to the end plate or frame are provided, so that the pressure can be reduced. Not only can the adjustment member limit the rise in pressure around the stator, but the block can also fill in the gaps between the pressure adjustment members, reducing the amount of insulating oil and suppressing volumetric expansion of the insulating oil itself.

[Brief explanation of the drawing]

第１図は従来装置の断面図、第２図はこの発明の一実施
例を示す断面図、第８図は第２図のＩ−Ｍ線における断
面図、第４図はこの発明のブロックの斜視図である。図
において、（１）はフレーム、（２）は固定子、（３）
はキャン、（４）は下部鍔、（５）は下部鍔、（６）は
上部ブラケット、（７）は下部ブラケツ１−１＠は回転
子、（ハ）はケース、（８１）は弾性体、（８Ｂ）はブ
ロックである。なお各図中同一符号は同−又は相当部分を示す。代理人　大　岩　増　雄第１図２θ 第２図第３図Ｊ第４図３手続補正書（自発）１、事件の表示　特願昭５８−１８９７６８号２、発明
の名称液封形電動機３、補正をする者代表者片由仁へ部４、代理人５、補正の対象明細書の発明の詳細な説明と図面の簡単な説明の欄およ
び図面。６、補正の内容（１）明細書の第６頁第４行目から第５行目に頁って「
第４図」とあるのを「第５図」と訂正する。（２）同第９頁８行において「斜視図である」とあるの
を以下の通り訂正する。「斜視図、第５図は第２図の要部断面図である」（３）図面として別紙のとおり第５図を挿入する。以上第５図特開昭６０−２８７３９（５）Fig. 1 is a sectional view of a conventional device, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 8 is a sectional view taken along line I-M in Fig. 2, and Fig. 4 is a block diagram of the present invention. FIG. In the figure, (1) is the frame, (2) is the stator, and (3)
is can, (4) is lower tsuba, (5) is lower tsuba, (6) is upper bracket, (7) is lower bracket 1-1@ is rotor, (c) is case, (81) is elastic body , (8B) are blocks. Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent Masuo Oiwa Fig. 1 2θ Fig. 2 Fig. 3 J Fig. 4 3 Procedural amendment (voluntary) 1. Indication of the case Japanese Patent Application No. 189768/1982 2. Name of the invention Liquid ring type electric motor 3. To the representative of the person making the amendment, Yuhito Kata, Department 4, agent 5, the column for the detailed description of the invention and the brief description of the drawings in the specification subject to the amendment, and the drawings. 6. Contents of the amendment (1) From the 4th line to the 5th line of page 6 of the specification, it is stated that “
"Figure 4" has been corrected to "Figure 5." (2) On page 9, line 8, the statement ``This is a perspective view'' is corrected as follows. "The perspective view and Figure 5 are cross-sectional views of the main parts of Figure 2." (3) Figure 5 is inserted as a drawing as shown in the attached sheet. Figure 5 above: Japanese Patent Application Laid-Open No. 60-28739 (5)

Claims

[Claims]

(1) A cylindrical frame, a stator fixed within the frame, a can disposed on the inner periphery of the stator, and a pair of cans and the frame that are watertightly connected to both ends of the frame to seal the stator. end plates, a pair of brackets respectively coupled to the pair of end plates, and a rotor supported by the pair of brackets and disposed within the can, the lubricating oil being sealed around the rotor; In a liquid-seal type motor in which insulating oil is sealed around the stator, a communication hole provided in the end plate or the frame and communicating with the periphery of the rotor or outside the frame, and a communication hole between the frame and the can inside the can. a pressure adjusting member that is coupled to a plate or the frame and has an elastic body that partitions the inside of the frame and the can into a chamber that communicates with the communication hole and a chamber that communicates with the periphery of the stator, and a space between the pressure adjusting members; A liquid-sealing type motive device, characterized in that it comprises a metal block arranged at the end plate and connected to the end plate or the frame.

(2) The liquid-sealed type motive device according to claim 1, wherein the metal block is hollow.