JPH0446094Y2 - - Google Patents
Info
- Publication number
- JPH0446094Y2 JPH0446094Y2 JP9563286U JP9563286U JPH0446094Y2 JP H0446094 Y2 JPH0446094 Y2 JP H0446094Y2 JP 9563286 U JP9563286 U JP 9563286U JP 9563286 U JP9563286 U JP 9563286U JP H0446094 Y2 JPH0446094 Y2 JP H0446094Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing shield
- oil
- insulating
- bearing
- receiving groove
- 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
Links
- 238000012856 packing Methods 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 15
- 238000009413 insulation Methods 0.000 description 13
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
この考案は、水素冷却する回転電機の密封油に
より油封される軸受部において、軸電流防止のた
め使用される絶縁ボルトの絶縁抵抗値低下を防止
する構造に関する。
This invention relates to a structure that prevents a decrease in the insulation resistance value of an insulating bolt used to prevent shaft current in a bearing portion of a hydrogen-cooled rotating electric machine that is sealed with sealing oil.
水素冷却する回転電機は、機内のガスが回転軸
に沿つて機外に漏出するのを防ぐため油密封装置
を備える。油密封装置には、シールハウジング内
に取り付けた１組の密封油リングがある。この密
封油リングは回転軸とともに半径方向には動きう
るが、ハウジングから突出したピンにより支持さ
れ、回転はしない。ここに機内ガス圧より高い圧
力油を流して、密封油リングと回転軸間のせまい
隙間を常に密封油で充満させ、機内ガスの流出を
防いでいる。
この種の回転電機においては、軸受部ベアリン
グシールドの水素側の面に、絶縁板を挟んでパツ
キンリング支えを、ベアリングシールドを貫通す
る絶縁ボルトで締付けるとともに、ベアリングシ
ールドの空気側の面に絶縁板を挟んで、密封油リ
ングを支持する密封油リング支えを絶縁ボルトで
締付けている。軸電流の流れを防止するために、
絶縁ボルトは、常に絶縁抵抗値が低下しないよう
に維持されなければならない。しかしながら軸受
部ベアリングシールド近辺は密封油リング支えと
回転軸間の隙間から漏れた油気中の水分やゴミが
多く存在し、絶縁板から毛細管現象で油気の水分
が浸入するので、絶縁抵抗値維持のための環境が
極めて悪い。
この種の絶縁抵抗値低下防止方法として従来は
(1)絶縁ボルトに使用する絶縁材料は特性のよいも
のを選ぶ、(2)空隙および沿面絶縁距離を規定値以
上とし余裕を持たせる、(3)油中の水分やゴミを取
り除く専用装置を別に設ける等を行つてきた。
Hydrogen-cooled rotating electric machines are equipped with an oil sealing device to prevent gas inside the machine from leaking out of the machine along the rotating shaft. The oil seal has a set of sealing oil rings mounted within the seal housing. This sealing oil ring can move radially with the rotating shaft, but is supported by a pin projecting from the housing and does not rotate. Oil under pressure higher than the in-machine gas pressure is flowed here to constantly fill the narrow gap between the sealing oil ring and the rotating shaft with sealing oil, preventing the in-machine gas from leaking out. In this type of rotating electric machine, a packing ring support is attached to the hydrogen side surface of the bearing shield with an insulating plate in between, and an insulating bolt that passes through the bearing shield is used to tighten the packing ring support. The sealing oil ring supports that support the sealing oil ring are tightened with insulating bolts. To prevent shaft current flow,
The insulation bolt must be maintained so that the insulation resistance value does not decrease at all times. However, in the vicinity of the bearing shield, there is a lot of moisture and dirt in the oil leaking from the gap between the sealing oil ring support and the rotating shaft, and the moisture in the oil leaks from the insulating plate by capillary action, so the insulation resistance value The environment for maintenance is extremely poor. The conventional method for preventing this type of insulation resistance drop is
(1) Select the insulating material used for the insulating bolt with good properties, (2) Ensure that the air gap and creepage insulation distance is greater than the specified value, and (3) Use special equipment to remove water and dirt from the oil. I have been setting up a separate one.
従来の上記の絶縁抵抗値低下防止方法には、そ
れぞれに次のような欠点がある。
まず対策(1)については現在使用している材料よ
り特性のよいものが市場にない、(2)については軸
受全体が大きくなり回転電機のコンパクト化に逆
行する、(3)については現在油タンクには軸受掃気
フアンや油フイルタが取付けられておりこれ以上
の装置を設けることは全体のコストアツプにつな
がるという欠点があつた。
この考案は、上述した事情に鑑み、絶縁ボルト
の絶縁材料には市販のものを使用し、絶縁距離も
規定値の構造とし、油中の水分やゴミを取除く専
用の装置を設けることなく、パツキンリング支え
を取付ける絶縁ボルトの絶縁抵抗値低下を防止で
きるようなベアリングシールド構造を提供するこ
とを目的とする。
Each of the above-mentioned conventional methods for preventing a decrease in insulation resistance value has the following drawbacks. First of all, regarding countermeasure (1), there is no material on the market with better properties than the material currently used, regarding (2), the size of the entire bearing will go against the trend of compact rotating electrical machines, and regarding (3), the current oil tank A bearing scavenging fan and an oil filter are attached to the engine, and the provision of more equipment has the disadvantage of increasing the overall cost. In view of the above-mentioned circumstances, this idea uses a commercially available insulating material for the insulating bolt, has a structure with a specified insulation distance, and does not require a special device to remove moisture and dirt from the oil. The purpose of the present invention is to provide a bearing shield structure that can prevent a decrease in the insulation resistance value of an insulating bolt for attaching a packing ring support.
この考案においては、水素冷却する回転電機の
軸受部ベアリングシールドの水素側の面に、絶縁
板を挟んで前記ベアリングシールドを貫通する絶
縁ボルトでパツキンリング支えを取付けた軸受部
ベアリングシールドの構造において、前記ベアリ
ングシールドの前記絶縁ボルトを締付ける空気側
の面に、絶縁ボルト取付用穴を巡り、その中心が
前記ベアリングシールドの中心より下方に偏芯し
たリング状の油受け溝と、この油受け溝の最下部
に穿つた油ドレン穴とを設けたことによつて上記
目的を達成する。
In this device, in a bearing shield structure for a hydrogen-cooled rotating electric machine, a packing ring support is attached to the hydrogen side of the bearing shield with an insulating bolt that passes through the bearing shield, sandwiching an insulating plate therebetween, and the air side of the bearing shield where the insulating bolt is tightened is provided with a ring-shaped oil receiving groove that runs around the insulating bolt mounting hole and has its centre eccentrically positioned below the centre of the bearing shield, and an oil drain hole drilled at the bottom of this oil receiving groove, thereby achieving the above object.
この考案においては、ベアリングシールドを貫
通する絶縁ボルトで水素側のパツキンリング支え
を固定していて、このベアリングシールドの前記
絶縁ボルトを締付ける空気側の面に、絶縁ボルト
取付用穴を巡り、その中心がベアリングシールド
の中心より下方に偏芯したリング状の油受け溝を
設けた。そのため、パツキンリング支えを取付け
た絶縁ボルト表面に付着した油気中の水分やゴミ
など絶縁抵抗値低下の要因となるものを、油受け
溝の上部から下部に集め、油受け溝の最下部に穿
つた油ドレン穴から軸受外に排出することができ
る。
In this invention, the hydrogen side gasket ring support is fixed with an insulating bolt that penetrates the bearing shield, and the insulating bolt mounting hole is placed around the air side surface of the bearing shield where the insulating bolt is tightened, and the center of the insulating bolt mounting hole is fixed. An eccentric ring-shaped oil receiving groove is provided below the center of the bearing shield. Therefore, the moisture and dirt in the oil that adheres to the surface of the insulating bolt to which the packing ring support is attached, which causes a decrease in insulation resistance, is collected from the top to the bottom of the oil receiving groove, and is collected at the bottom of the oil receiving groove. The oil can be drained out of the bearing through the drilled oil drain hole.
第１図および第２図はこの考案の実施例を示す
もので、第１図は縦断面図、第２図は第１図のＡ
−Ａ矢視断面図である。図において、１はベアリ
ングシールドで、このベアリングシールド１の水
素側（機内側）に水素シールパツキン２を支える
水素側パツキンリング支え３を取付けるが、軸電
流防止のため、取付面に絶縁板４ａを挟み込み、
ベアリングシールド１を貫通して絶縁座金５ａと
絶縁管６ａで絶縁された絶縁ボルト７ａでパツキ
ンリング支え３を締付ける。
またベアリングシールド１の空気側（軸受室
内）に密封油リング８ａを設け、密封油リング８
ａに機内ガス圧より若干圧力が高い油を流入さ
せ、水素ガスの漏洩を防いでいる。密封油リング
８ａを密封油リング支え８で支持している。軸電
流防止のためベアリングシールド１の空気側の取
付面に絶縁板４ｂを挟み込み、密封油リング支え
８を絶縁座金５ｂと絶縁管６ｂとで絶縁された絶
縁ボルト７ｂで締付ける。
この構造においては、空気側の油のシールはパ
ツキン２により行い、絶縁板４ｂは軸電流防止用
として使用する。絶縁板４ｂはエポキシガラスを
積層したものであり、その表面は均一面となつて
いないため、毛細管現象により油気がパツキンリ
ンク支えを取付けた絶縁ボルト７ａ側に浸入す
る。
この考案においては、ベアリングシールド１を
貫通する絶縁ボルト７ａで水素側のパツキンリン
グ支え３を固定していて、このベアリングシール
ド１の絶縁ボルト７ａを締付ける空気側の面に、
絶縁ボルト取付用穴９を巡り、第２図に示すよう
に、中心点O′がベアリングシールド１の中心点
Ｏより下方にＢだけ偏芯したリング状の油受け溝
１０と、この油受け溝１０の最下部に穿つた油ド
レン穴１１とを設けた。
これにより密封油リング８ａと回転軸間より漏
れた油気中の水分やゴミなどが、絶縁ボルト７ａ
の絶縁座金５ａとベアリングシールド１との間に
付着堆積することなく油受け溝１０に入り、そし
て油受け溝１０中を下降して下部に集められ、油
ドレン穴１１を通つて軸受室外に排出される。な
お第２図に示す１２は絶縁ボルト７ｂがねじ込ま
れる穴である。
Figures 1 and 2 show an embodiment of this invention, with Figure 1 being a longitudinal sectional view and Figure 2 being A of Figure 1.
-A cross-sectional view. In the figure, 1 is a bearing shield, and a hydrogen side gasket ring support 3 that supports a hydrogen seal gasket 2 is attached to the hydrogen side (inside the machine) of this bearing shield 1.In order to prevent axial current, an insulating plate 4a is attached to the mounting surface. pinching,
The packing ring support 3 is tightened with an insulating bolt 7a that passes through the bearing shield 1 and is insulated by an insulating washer 5a and an insulating tube 6a. In addition, a sealing oil ring 8a is provided on the air side (inside the bearing chamber) of the bearing shield 1.
Oil with a pressure slightly higher than the in-flight gas pressure is allowed to flow into a to prevent hydrogen gas from leaking. A sealing oil ring 8a is supported by a sealing oil ring support 8. To prevent shaft current, an insulating plate 4b is sandwiched between the air-side mounting surface of the bearing shield 1, and the sealing oil ring support 8 is tightened with an insulating bolt 7b insulated by an insulating washer 5b and an insulating tube 6b. In this structure, the oil on the air side is sealed by the packing 2, and the insulating plate 4b is used to prevent axial current. The insulating plate 4b is made of laminated epoxy glass, and since its surface is not uniform, oil permeates into the insulating bolt 7a side to which the packing link support is attached due to capillary action. In this invention, the gasket ring support 3 on the hydrogen side is fixed with an insulating bolt 7a that passes through the bearing shield 1, and on the air side surface of the bearing shield 1 on which the insulating bolt 7a is tightened,
As shown in FIG. 2, surrounding the insulating bolt mounting hole 9, there is a ring-shaped oil receiving groove 10 whose center point O' is offset by an amount B below the center point O of the bearing shield 1, and this oil receiving groove. An oil drain hole 11 is provided at the bottom of the hole 10. As a result, moisture and dirt in the oil leaking between the sealing oil ring 8a and the rotating shaft are removed from the insulating bolt 7a.
The oil enters the oil receiving groove 10 without being deposited between the insulating washer 5a and the bearing shield 1, descends in the oil receiving groove 10, is collected at the lower part, and is discharged to the outside of the bearing chamber through the oil drain hole 11. be done. Note that 12 shown in FIG. 2 is a hole into which the insulating bolt 7b is screwed.
この考案によれば、ベアリングシールドの空気
側の面に、絶縁ボルト取付用穴を巡り中心がベア
リングシールドの中心より下方に偏芯したリング
状の油受け溝を設け、かつこの溝の最下部に油ド
レン穴を設けることにより、軸受より漏れた油気
は絶縁座金に付着堆積することなく油受け溝に入
り、溝中を下降して下部に集まり油ドレン穴より
排出されるので、パツキンリング支え用の絶縁ボ
ルトの絶縁抵抗値を常に高く維持し軸電流の流れ
を阻止できる。
According to this invention, a ring-shaped oil receiving groove is provided on the air side surface of the bearing shield, surrounding the insulating bolt mounting hole, and whose center is eccentrically downward from the center of the bearing shield, and at the bottom of this groove. By providing an oil drain hole, oil leaking from the bearing enters the oil receiving groove without depositing on the insulating washer. The insulation resistance value of the insulating bolt can be maintained high at all times to prevent the flow of shaft current.
第１図はこの考案の一実施例である軸受部ベア
リングシールドの構造を示す縦断面図、第２図は
第１図のＡ−Ａ矢視断面図である。
１……ベアリングシールド、３……パツキンリ
ング支え、４ａ，４ｂ……絶縁板、７ａ，７ｂ…
…絶縁ボルト、８……密封油リング支え、９……
絶縁ボルト取付用穴、１０……油受け溝、１１…
…油ドレン穴。
FIG. 1 is a longitudinal sectional view showing the structure of a bearing shield according to an embodiment of this invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1... Bearing shield, 3... Packing ring support, 4a, 4b... Insulating plate, 7a, 7b...
...Insulation bolt, 8...Sealing oil ring support, 9...
Insulation bolt mounting hole, 10...Oil receiving groove, 11...
...Oil drain hole.
Claims (1)
ルドの水素側の面に、絶縁板を挟んで前記ベアリ
ングシールドを貫通する絶縁ボルトでパツキンリ
ング支えを取付けた軸受部ベアリングシールドの
構造において、前記ベアリングシールドの前記絶
縁ボルトを締付ける空気側の面に、絶縁ボルト取
付用穴を巡り、その中心が前記ベアリングシール
ドの中心より下方に偏芯したリング状の油受け溝
と、この油受け溝の最下部に穿つた油ドレン穴と
を設けたことを特徴とする回転電機の軸受部ベア
リングシールドの構造。 In the structure of the bearing shield in which a packing ring support is attached to the hydrogen side surface of the bearing shield of the bearing shield of a rotating electric machine to be cooled by hydrogen, with an insulating bolt passing through the bearing shield with an insulating plate in between, On the air side surface on which the insulating bolt is to be tightened, there is a ring-shaped oil receiving groove that goes around the insulating bolt mounting hole, the center of which is eccentrically downward from the center of the bearing shield, and a ring-shaped oil receiving groove that is bored at the bottom of this oil receiving groove. A structure of a bearing shield for a bearing part of a rotating electric machine, which is characterized by having an oil drain hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9563286U JPH0446094Y2 (en) | 1986-06-23 | 1986-06-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9563286U JPH0446094Y2 (en) | 1986-06-23 | 1986-06-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS631921U JPS631921U (en) | 1988-01-08 |
| JPH0446094Y2 true JPH0446094Y2 (en) | 1992-10-29 |
Family
ID=30960394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9563286U Expired JPH0446094Y2 (en) | 1986-06-23 | 1986-06-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446094Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0215279U (en) * | 1988-07-04 | 1990-01-30 |
-
1986
- 1986-06-23 JP JP9563286U patent/JPH0446094Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS631921U (en) | 1988-01-08 |
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