JPH04185977A - Shaft seal device for electric rotary machine - Google Patents
Shaft seal device for electric rotary machineInfo
- Publication number
- JPH04185977A JPH04185977A JP31502790A JP31502790A JPH04185977A JP H04185977 A JPH04185977 A JP H04185977A JP 31502790 A JP31502790 A JP 31502790A JP 31502790 A JP31502790 A JP 31502790A JP H04185977 A JPH04185977 A JP H04185977A
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- grease
- tank
- high viscosity
- atmospheric
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 6
- 239000004519 grease Substances 0.000 abstract description 17
- 230000007423 decrease Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000638 solvent extraction Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
【発明の詳細な説明】
「発明の目的」
（産業上の利用分野）
本発明は回転電機の回転子又はフライホイール等のロー
タを真空中で回転させる軸封装置に関する。DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a shaft sealing device for rotating a rotor such as a rotor or a flywheel of a rotating electrical machine in a vacuum.
（従来の技術）
第４図は従来の室軸水車発電機の断面構造の一例である
。(Prior Art) FIG. 4 is an example of a cross-sectional structure of a conventional chamber-shaft water turbine generator.
第４図おいて（１）は発電機風洞でコンクリート。In Figure 4, (1) is concrete in the generator wind tunnel.
鋼板、鋳鋼等で形成される。（２）はステータ、（３）
はロータ、（４）は回転軸である。回転軸（４）はその
下端で図示しない水車軸と結合しエネルギの授受を行う
。通常、風洞（１）内は大気圧であり、ロータ（３）は
大気中で回転する為、風損が大であり、風損が発電機全
損失の２５％以上になる場合もある。Made of steel plate, cast steel, etc. (2) is the stator, (3)
is a rotor, and (4) is a rotating shaft. The rotating shaft (4) is connected at its lower end to a water wheel shaft (not shown) to transfer energy. Normally, the inside of the wind tunnel (1) is at atmospheric pressure, and the rotor (3) rotates in the atmosphere, so the wind loss is large, and in some cases, the wind loss is 25% or more of the total loss of the generator.
第５図は上記風損を減少させる為に、発電機風洞（１）
内を真空にさせる従来の一例である。第５図において（
５）は風洞内を大気側とを仕切る軸封装置である。第６
図は第５図で従来用いられている軸封装置（５）の詳細
図で、いわゆるオイルフィルムシールである。第６図に
示すようにオイルフィルムシールはシャフトスリーブ（
２３）とわずかな隙間（１１）をもワたシールリング（
９）を設け、その隙間（１１）に大気圧よりわずかに高
い圧力のシール油（２２）を供給し、油膜を形成させて
大気側と真空側を遮断する。この第６図の場合、次の様
な欠点がある。Figure 5 shows the generator wind tunnel (1) in order to reduce the above windage loss.
This is an example of a conventional method that creates a vacuum inside. In Figure 5 (
5) is a shaft sealing device that separates the inside of the wind tunnel from the atmosphere side. 6th
The figure is a detailed view of the conventionally used shaft seal device (5) shown in FIG. 5, which is a so-called oil film seal. As shown in Figure 6, the oil film seal is attached to the shaft sleeve (
23) and the slight gap (11) with the seal ring (
9), and seal oil (22) at a pressure slightly higher than atmospheric pressure is supplied to the gap (11) to form an oil film to isolate the atmosphere side from the vacuum side. The case shown in FIG. 6 has the following drawbacks.
（発明が解決しようとする課題）
水車発電機の様に大形の回転電機の場合、軸ブレが大で
ある為、シールリング（９）とシャフトスリーブ（２３
）との接触を防ぐ為に隙間（１１）をあまり小さくでき
ない。従って、シール油（２２）の供給圧力を大にして
供給量を増やす必要があり、真空側に大量のシール油を
噴出する事となる。この噴出した油が回転軸の回転によ
って拡散され、油霧となって風洞内に充満する。この為
高真空を得られない丈でなく、風洞内の回転電機の各部
に油を付着させ、コイルの絶縁性能の低下等、種々の障
害を惹起している。(Problem to be solved by the invention) In the case of a large rotating electric machine such as a water turbine generator, shaft vibration is large, so the seal ring (9) and shaft sleeve (23
), the gap (11) cannot be made too small. Therefore, it is necessary to increase the supply pressure of the seal oil (22) to increase the supply amount, resulting in a large amount of seal oil being spouted to the vacuum side. This jetted oil is spread by the rotation of the rotating shaft, and becomes oil mist that fills the wind tunnel. For this reason, it is not long enough to obtain a high vacuum, and oil adheres to various parts of the rotating electrical machine inside the wind tunnel, causing various problems such as a decline in the insulation performance of the coil.
本発明は上記の様な従来技術の欠点をなくし風損を少く
できる回転電機の軸封装置を提供する事を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a shaft sealing device for a rotating electrical machine that eliminates the drawbacks of the prior art as described above and can reduce windage loss.
［発明の構成コ
（課題を解決するための手段）
上記目的を達成するために本発明においては、真空中で
ロータを回転させる回転電機において、大気側と真空側
とを区切る遮蔽板と、遮蔽板を貫通する回転軸との間隙
に大気側油脂槽から充填した高粘度油脂と、大気圧にて
真空側へ押し出された高粘度油脂を溜める真空側油脂槽
と、真空側油脂槽に溜めた高粘度油脂を前記大気側油脂
槽へ循環させるポンプ並びに配管とを備える。[Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention provides a rotating electric machine that rotates a rotor in a vacuum, a shielding plate that separates the atmosphere side from the vacuum side, and a shielding plate that separates the atmosphere side and the vacuum side. High viscosity oil is filled from the atmosphere side oil tank into the gap with the rotating shaft that passes through the plate, and the vacuum side oil tank stores high viscosity oil pushed out to the vacuum side by atmospheric pressure, and the vacuum side oil tank stores high viscosity oil and fat. It includes a pump and piping that circulate high viscosity oil to the atmosphere-side oil tank.
（作 用）
上記のようにすると、高粘度油脂が、シールリングと回
転軸との隙間に充満するので、風洞内の真空を保持し、
ロータ回転の効率を良くした回転電機の軸封装置が得ら
れる。(Function) By doing the above, the gap between the seal ring and the rotating shaft is filled with high viscosity oil, which maintains the vacuum in the wind tunnel.
A shaft sealing device for a rotating electrical machine with improved rotor rotation efficiency can be obtained.
（実施例）
実施例１
以下、本発明の第１の実施例について、第１図および第
２図を参照して説明する。尚、これらの図面において、
従来例として説明した第４図ないし第６図の部分と同一
部分には同一符号を付して説明を省略する。(Examples) Example 1 A first example of the present invention will be described below with reference to FIGS. 1 and 2. In addition, in these drawings,
The same parts as those shown in FIGS. 4 to 6 described as the conventional example are designated by the same reference numerals, and the description thereof will be omitted.
本実施例１においては、支軸形回転電機の場合を示し、
下部の大気側油脂案内部材（６）は回転軸（４）に固定
されて回転軸（４）と共に回転し、静止側の遮蔽板の内
周側に回転軸に対向して取り付けられたシールリング（
９）と遮蔽板（１０）とで大気側油脂槽（８）を形成−
している。又、シールリング（９）は遮蔽板（１０）に
固定され、回転軸（４）と隙間（１１）をもって対向し
、かつ遮蔽板上部に真空側油脂槽（１２）を形成する。In this first embodiment, the case of a spindle type rotating electric machine is shown,
The lower atmosphere side oil guide member (6) is fixed to the rotating shaft (4) and rotates together with the rotating shaft (4), and a seal ring is attached to the inner circumferential side of the stationary side shielding plate facing the rotating shaft. (
9) and the shielding plate (10) form an atmosphere-side oil tank (8).
are doing. Further, the seal ring (9) is fixed to the shielding plate (10), faces the rotating shaft (4) with a gap (11), and forms a vacuum-side oil tank (12) above the shielding plate.
また、真空側油脂案内部材（７）は回転軸（４）に固定
されて回転する。真空側油脂槽（１２）と大気側油脂槽
（８）間はポンプ（１６）を持った配管（ｌｅａ）で連
通させる。Further, the vacuum side oil guide member (7) is fixed to the rotating shaft (4) and rotates. The vacuum side oil tank (12) and the atmosphere side oil tank (8) are communicated with each other by a pipe (lea) having a pump (16).
グリースのような高粘度油脂（８ａ）は最初大気側油脂
槽（８）に充填しておく。尚、第１図において、（１４
） 、 （１５）はロータ、ステータの冷却装置である
。High viscosity oil (8a) such as grease is first filled in the atmosphere side oil tank (8). In addition, in Figure 1, (14
) and (15) are rotor and stator cooling devices.
次に、上記実施例１の作用を説明する。Next, the operation of the first embodiment will be explained.
真空ポンプ（１３）を駆動すると風洞（１）内の気圧が
低下する。シールリング（９）の上下の両端で大気圧と
真空との差圧が生じると高粘度油脂（８ａ）は油脂槽（
８）から隙間（１１）を通って上部油脂案内部材（７）
に達し、さらに真空側油脂槽（１２）に到る。When the vacuum pump (13) is driven, the air pressure inside the wind tunnel (1) decreases. When a pressure difference between atmospheric pressure and vacuum occurs at the upper and lower ends of the seal ring (9), the high viscosity oil (8a) will flow into the oil tank (
8) through the gap (11) to the upper oil guide member (7).
, and further reaches the vacuum side oil tank (12).
ロータ（３）が回転すれば高粘度油脂（８ａ）は隙間（
１１）内全周に充満し、風洞（１）内を大気側から遮断
する。また真空側油脂槽（１２）内に流入した高粘度油
脂（８ａ）はポンプ（１６）により強制的に大気側油脂
槽（８）に環流させられ、連続的に循環する。このポン
プ（１Ｂ）は間欠運転で良く、電力消費は少い。When the rotor (3) rotates, the high viscosity oil (8a) fills the gap (
11) Fills the entire circumference of the wind tunnel (1) and blocks it from the atmosphere. Further, the high viscosity oil (8a) that has flowed into the vacuum side oil tank (12) is forced to flow back to the atmosphere side oil tank (8) by the pump (16), and is continuously circulated. This pump (1B) can be operated intermittently and consumes little electricity.
また、グリースのような高粘度油脂を用いたので蒸発や
拡散が極めて微量で発電機の性能上無視しうる程度であ
る。この為、風洞内を真空ポンプ（１３）で脱気すれば
、風洞内を容易に高真空に保つことができる。Furthermore, since a high viscosity oil such as grease is used, the amount of evaporation and diffusion is extremely small and can be ignored in terms of the performance of the generator. Therefore, by deaerating the inside of the wind tunnel with the vacuum pump (13), the inside of the wind tunnel can be easily maintained at a high vacuum.
ロータ（３）の風損は風洞内気体の密度に比例する。従
って、本実施例１によれば容易に高真空を得られる為、
風損を大巾に減少させることができる。The windage loss of the rotor (3) is proportional to the density of the gas in the wind tunnel. Therefore, according to the first embodiment, since a high vacuum can be easily obtained,
Windage loss can be greatly reduced.
実施例２
第３図に示す第２の実施例は、室軸回転電機で上側が大
気、下側が真空の場合である。Embodiment 2 A second embodiment shown in FIG. 3 is a chamber-shaft rotating electric machine in which the upper side is in the atmosphere and the lower side is in a vacuum.
この場合は下側の真空側油脂槽（１２）内の高粘度油脂
（８ａ）をポンプ（１Ｂ）で上側の大気側油脂槽（８）
へ汲み上げる。他は実施例１と同様である。In this case, the high viscosity oil (8a) in the lower vacuum side oil tank (12) is pumped (1B) to the upper atmosphere side oil tank (8).
Pump up to. The rest is the same as in Example 1.
このようにするとポンプ（１６）の動作が汲み上げにな
ることが異なるだけで、他は実施例１と同様の作用効果
が得られる。In this way, the same effects as in the first embodiment can be obtained, except that the operation of the pump (16) is pumping.
［発明の効果コ
以上説明したように、本発明によれば高粘度油脂が遮蔽
板のシールリングと回転軸との隙間に充満するので、風
洞内の真空を保持し、回転子やフライホイール等のロー
タ回転の効率を良くした回転電機の軸封装置が得られる
。[Effects of the Invention] As explained above, according to the present invention, the gap between the seal ring of the shielding plate and the rotating shaft is filled with high viscosity oil, thereby maintaining the vacuum in the wind tunnel and preventing the rotor, flywheel, etc. A shaft sealing device for a rotating electrical machine that improves the efficiency of rotor rotation is obtained.
第１図は本発明の回転電機の第１の実施例を示す縦断面
図、第２図は第１図の要部を示す拡・大縦断面図、第３
図は第２図の実施例を示す要部縦断面図、第４図は風洞
を真空にしない場合の従来例の縦断面図、第５図は風洞
を真空にする場合の従来例の縦断面図、第６図は第５図
の要部を示す拡大縦断面図である。
３・・・ロータ、 ４・・・回転軸、６・・
・大気側油脂案内部材、
７・・・真空側油脂案内部材、
８・・・大気側油脂槽、 ８ａ１０．高粘度油脂、９
・・・シールリング、１０・・・遮蔽板、１１・・・隙
間、 １２・・・真空側油脂槽、１６・・・
ポンプ。
代理人 弁理士 大 胡 典 夫
第１図
第 ２ 図
第４図FIG. 1 is a longitudinal sectional view showing a first embodiment of a rotating electric machine of the present invention, FIG. 2 is an enlarged longitudinal sectional view showing the main part of FIG. 1, and FIG.
The figure is a longitudinal sectional view of the main part showing the embodiment shown in Fig. 2, Fig. 4 is a longitudinal sectional view of the conventional example when the wind tunnel is not evacuated, and Fig. 5 is a longitudinal sectional view of the conventional example when the wind tunnel is evacuated. FIG. 6 is an enlarged longitudinal sectional view showing the main part of FIG. 5. 3... Rotor, 4... Rotating shaft, 6...
- Atmospheric side oil and fat guide member, 7... Vacuum side oil and fat guide member, 8... Atmospheric side oil and fat tank, 8a10. High viscosity oil, 9
... Seal ring, 10... Shielding plate, 11... Gap, 12... Vacuum side oil tank, 16...
pump. Agent Patent Attorney Norio Ogo Figure 1 Figure 2 Figure 4
Claims (1)
と真空側とを区切る遮蔽板と、遮蔽板を貫通する回転軸
との間隙に大気側油脂槽から充填した高粘度油脂と、大
気圧にて真空側へ押し出された高粘度油脂を溜める真空
側油脂槽と、真空側油脂槽に溜めた高粘度油脂を前記大
気側油脂槽へ循環させるポンプ並びに配管とを備えたこ
とを特徴とする回転電機の軸封装置。In a rotating electric machine that rotates a rotor in a vacuum, high viscosity oil is filled from an atmosphere-side oil tank into the gap between a shielding plate that separates the atmosphere side and the vacuum side and a rotating shaft that passes through the shielding plate, and a high-viscosity oil is filled at atmospheric pressure. A rotating electric machine comprising: a vacuum-side oil tank that stores high-viscosity oil pushed out to the vacuum side; and a pump and piping that circulate the high-viscosity oil stored in the vacuum-side oil tank to the atmosphere-side oil tank. shaft sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31502790A JPH04185977A (en) | 1990-11-20 | 1990-11-20 | Shaft seal device for electric rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31502790A JPH04185977A (en) | 1990-11-20 | 1990-11-20 | Shaft seal device for electric rotary machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04185977A true JPH04185977A (en) | 1992-07-02 |
Family
ID=18060543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31502790A Pending JPH04185977A (en) | 1990-11-20 | 1990-11-20 | Shaft seal device for electric rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04185977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913068A (en) * | 2015-05-28 | 2015-09-16 | 哈尔滨工业大学 | High-low-temperature box penetrating shaft gas sealing device and application |
-
1990
- 1990-11-20 JP JP31502790A patent/JPH04185977A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913068A (en) * | 2015-05-28 | 2015-09-16 | 哈尔滨工业大学 | High-low-temperature box penetrating shaft gas sealing device and application |
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