JPH03191262A - Very low temperature rotary machinery and apparatus - Google Patents
Very low temperature rotary machinery and apparatusInfo
- Publication number
- JPH03191262A JPH03191262A JP32598389A JP32598389A JPH03191262A JP H03191262 A JPH03191262 A JP H03191262A JP 32598389 A JP32598389 A JP 32598389A JP 32598389 A JP32598389 A JP 32598389A JP H03191262 A JPH03191262 A JP H03191262A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- heat
- insulating member
- vacuum
- low temperature
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 239000001307 helium Substances 0.000 abstract description 11
- 229910052734 helium Inorganic materials 0.000 abstract description 11
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 11
- 229920001342 Bakelite® Polymers 0.000 abstract description 8
- 239000004637 bakelite Substances 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は極低温回転機器に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to cryogenic rotating equipment.
従来の極低温回転機器の構造例としては、例えば、小形
ヘリウム冷凍システム、日立評論、６８゜４３（１９８
６−３）に記載のように、侵入熱を低減させるために熱
伝導率の小さい断熱板を設けた例が示されている。As an example of the structure of conventional cryogenic rotating equipment, for example, a small helium refrigeration system, Hitachi Hyoron, 68°43 (198
As described in 6-3), an example is shown in which a heat insulating plate with low thermal conductivity is provided in order to reduce the intrusion heat.
上記従来技術は常温から極低温部への侵入熱の低減方法
について十分配慮されておらず、極低温回転機器の効率
な低下させるという問題があった。The above-mentioned conventional technology does not give sufficient consideration to the method of reducing the heat that enters the cryogenic part from room temperature, and there is a problem in that the efficiency of the cryogenic rotating equipment is reduced.
本発明は回転機器の効率を向上させることを目的として
おり、さらには冷凍機システムの効率の向上を提供する
ことを目的とする。The present invention aims to improve the efficiency of rotating equipment, and further aims to provide improved efficiency of refrigerator systems.
上記目的を達成するために、極低温回転機器の断熱板を
薄肉の中空容器とし、内部を真空にすることにより熱伝
導により侵入熱を極力小さ（するものである。In order to achieve the above object, the heat insulating plate of the cryogenic rotating equipment is made into a thin-walled hollow container, and by making the inside a vacuum, the intrusion heat is minimized by heat conduction.
また、断熱板の内部に積層断熱材を設けたのは、さらに
ふく射による侵入熱を低減させるためである。Furthermore, the reason why the laminated heat insulating material is provided inside the heat insulating board is to further reduce the intrusion heat due to radiation.
極低温回転機器の低温部の羽根と常温の軸受部分に設け
られた断熱板は薄肉の中空容器となっており、内部は真
空に保たれているので、熱伝導による常温部からの侵入
熱は通常のベークライト等で製作された断熱板に比べる
と極めて小さい。それによって、低温部への侵入熱は小
さ鳴なり、回転機器の出口流体温度は上昇することな畷
定められた断熱効率を維持できる。The heat insulating plates installed in the blades of the low-temperature parts of cryogenic rotating equipment and the bearing parts at room temperature are thin-walled hollow containers, and the interior is kept in a vacuum, so no heat can enter from the room-temperature parts due to heat conduction. It is extremely small compared to ordinary insulation boards made of Bakelite etc. As a result, the amount of heat intruding into the low-temperature part is reduced, and the temperature of the outlet fluid of the rotating equipment does not rise, and the specified adiabatic efficiency can be maintained.
以下本発明の一実施例を、第１図および第２図により説
明する。第１図は例えば低温（釣８０Ｋ）のヘリウムガ
スを圧縮して循環するヘリウムブロワーセの概略図を示
す。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a schematic diagram of a helium blower that compresses and circulates low-temperature (80K) helium gas, for example.
入口管９により吸込まれた１、 ２ ａｉｍ約８０にの
ヘリウムガスは高速回転しているインペラー１により圧
縮されて出口管１０を通って被冷却体（図示省略）を送
られて循環している。シャフト８の駆動はモータロータ
゛２とモータステータ３からなる高周波モータにより行
われ、シャフトはジャーナル軸受４およびスラスト軸受
５による気体軸受によって支持されている。またモータ
の発熱は冷却水を水入口管１３から水出口管１４へ一定
量流すことによって除去されている。断熱部材６は例え
ばベークライト製の内部７が真空に封し込められている
低温部（約８０Ｋ）と常温部（約３００Ｋ）の熱的断熱
を行い侵入熱を低減させ、インペラー１によって断熱圧
縮されたヘリウムガスの温度の上昇を極力押えるために
設けである。なお、Ｈの一点鎖線はヘリウムブロワ−認
を収納する仮想的な真空保冷槽を示す。第２図に断熱部
材６の構造図を示す。材質は熱伝導率が小さい例えばス
テンレス製の、上板ガと下板ｎとベークライト製の内周
リング器および外周リング冴より構成され、それぞれ接
着され気密構造となっている。また上板ｎと下板ｎの内
面は例えばパフ研磨されておりふく耐重を小さくしてい
る。さらに断熱部材６は例えば銀ロウ付された銅管５よ
り真空引した後、圧接され気密を保持されている。Helium gas at about 1 or 2 Aim 80, which is sucked in through the inlet pipe 9, is compressed by the impeller 1 which rotates at high speed, and is circulated through the outlet pipe 10 and sent to the object to be cooled (not shown). . The shaft 8 is driven by a high frequency motor consisting of a motor rotor 2 and a motor stator 3, and the shaft is supported by a gas bearing including a journal bearing 4 and a thrust bearing 5. Further, the heat generated by the motor is removed by flowing a constant amount of cooling water from the water inlet pipe 13 to the water outlet pipe 14. The heat insulating member 6 has an interior 7 made of Bakelite, for example, which thermally insulates the low temperature part (approximately 80 K) sealed in vacuum and the room temperature part (approximately 300 K) to reduce the intrusion heat, and is adiabatically compressed by the impeller 1. This is provided to suppress the rise in temperature of the helium gas as much as possible. Note that the dashed line H indicates a virtual vacuum cold storage tank that accommodates the helium blower. FIG. 2 shows a structural diagram of the heat insulating member 6. The material is made of an upper plate and a lower plate made of stainless steel having a low thermal conductivity, and an inner ring and an outer ring made of Bakelite, each of which is bonded to form an airtight structure. Further, the inner surfaces of the upper plate n and the lower plate n are, for example, puff-polished to reduce the weight resistance. Further, the heat insulating member 6 is, for example, evacuated from a silver-brazed copper tube 5 and then press-fitted to maintain airtightness.
次に断熱部材を従来例のようにベークライト製の円板で
作つた場合と本発明の真空容器にした場合の３００Ｋか
ら８０Ｋまでの侵入熱蓋の概略計算を行ってみる。まず
断熱部材がベークライト板（直径φＩＱＱＩＩＩＩ、厚
さ１０鵡）のときの侵入熱はベークライトの熱伝導率を
０．４ （Ｗ／ｍ”Ｋ ］とすると
次に本発明の場合、中空であるので熱伝導による侵入熱
は十分小さくできるが、ふく射による侵入熱も検討する
必要がある。パフ研磨したステンレスのふく耐重を０．
２とすると、ふ（射による侵入熱は
ＱＡ＝ （０，１）２Ｘ０．２Ｘ５．６６Ｘ１０−’
Ｘ （３００’−８０’）＝０．７２Ｋ次に外周リング
必の厚さを５諺とすると、熱伝導による侵入熱は
Ｑ［１＝０．４ＸＸＸ０．ＩＸｏ、００５Ｘ”’ ”’
＝１３．８ＷＯ１０１
合計で
Ｑ２ ＝ＱＡ ＋ＱＯ＝ ０．７２ ＋ １３．８中１
５Ｗしたがって本実施例によれば侵入熱を約８０−低減
が可能となる。Next, we will roughly calculate the heat intrusion cover from 300K to 80K when the heat insulating member is made of a Bakelite disk as in the conventional example and when the vacuum container of the present invention is used. First, when the heat insulating member is a Bakelite plate (diameter φIQQIII, thickness 10 mm), the heat intrusion is calculated by assuming that the thermal conductivity of Bakelite is 0.4 (W/m"K). Next, in the case of the present invention, since it is hollow, Although the heat intrusion due to thermal conduction can be sufficiently reduced, it is also necessary to consider the intrusion heat due to radiation.
2, the heat intrusion due to radiation is QA= (0,1)2X0.2X5.66X10-'
X (300'-80') = 0.72K Next, if the thickness of the outer ring is assumed to be 5, the intrusion heat due to thermal conduction is Q[1 = 0.4XXX0. IXo, 005X”'”'
=13.8WO101 Total Q2 =QA +QO= 0.72 + 1 out of 13.8
5W. Therefore, according to this embodiment, it is possible to reduce the intrusion heat by about 80.
以上、詳細に述べたように本実施例によれば、効果的に
常温から極低滋部への侵入熱を低減できる効果があり、
極低温機器の断熱効率を向上できる効果がある。As described in detail above, according to this embodiment, it is possible to effectively reduce the intrusion of heat from normal temperature to the extremely low temperature part.
It has the effect of improving the insulation efficiency of cryogenic equipment.
第３図に本発明の第２の実施例を示す。繭述の一実施例
と同一の符号のものの説明は省略する。FIG. 3 shows a second embodiment of the invention. Descriptions of parts with the same reference numerals as those in the embodiment will be omitted.
本実施例では断熱部材６のステンレス製の上板ｎおよび
下板ｎはパフ研磨されていないが、真空槽内にはアルミ
蒸着された積層断熱材がか設けられており効果的にふく
射熱を低減できる効果があり。In this embodiment, the stainless steel upper plate n and lower plate n of the heat insulating member 6 are not puff polished, but a laminated heat insulating material deposited with aluminum is provided inside the vacuum chamber to effectively reduce radiated heat. There is an effect that can be done.
極低ｉＩＡ機器の断熱効率を向上できる効果がある。This has the effect of improving the insulation efficiency of extremely low iIA equipment.
！４図に本発明の第３の実施例を示す。一実施例を第１
図と同一符号のものの説明は省略する。! FIG. 4 shows a third embodiment of the present invention. One example is the first
Descriptions of parts with the same reference numerals as those in the figures will be omitted.
断熱部材６の内部は真空封じ切りさ訂ておらすへリウム
ブロワーの上部ケーシングおと下部ケーシング（資）に
設けた連通孔！および（を介して真空槽と通じている。The inside of the heat insulating member 6 is vacuum-sealed and there are communication holes provided in the upper and lower casings of the helium blower. It communicates with the vacuum chamber through and (.
したがって真空保冷槽１１内が所定の真空に達すれば、
断熱部材６内も真空になる構造となっている。従つて、
本実施例によれば断熱部材６は真空封じ切りされていな
いので、真空劣化等の問題を生ずることなく断熱性能の
信頼性を高める効果があり、また、常温から極低温部へ
の侵入熱を低減できる効果があり、極低温機器の断熱効
率を向上できる効果がある。Therefore, when the inside of the vacuum cold storage tank 11 reaches a predetermined vacuum,
The inside of the heat insulating member 6 is also evacuated. Therefore,
According to this embodiment, since the heat insulating member 6 is not vacuum sealed, it has the effect of increasing the reliability of the heat insulating performance without causing problems such as vacuum deterioration, and also prevents heat from entering from room temperature to the cryogenic part. It has the effect of reducing the amount of carbon dioxide, and it has the effect of improving the insulation efficiency of cryogenic equipment.
第５図に本発明の第４の実施例を示す。断熱部材６の内
部は真空封じ切りされておらずヘリウムブロク−の上部
ケーシング３１に設けた連通孔にと通じている。また連
通孔！は外部配管調と接続されており、単独で真空引き
が行えるようになっている。所定の真空引きが終了する
と真空バルブ墨な閉じればよい。従って、本実施例によ
れば断熱部材６を単独で真空引きできるので真空劣化の
間層がなく、断熱性能の信頼性を高める効果があり、常
温から極低温部への侵入熱を低減できる効果があり、極
低温機器の断熱効率を向上できる効果がある。FIG. 5 shows a fourth embodiment of the present invention. The inside of the heat insulating member 6 is not vacuum sealed and communicates with a communication hole provided in the upper casing 31 of the helium block. Another communication hole! is connected to an external piping control so that vacuuming can be performed independently. When the predetermined evacuation is completed, the vacuum valve may be closed. Therefore, according to this embodiment, since the heat insulating member 6 can be evacuated independently, there is no layer of vacuum deterioration, which has the effect of increasing the reliability of the heat insulating performance, and has the effect of reducing heat intrusion from normal temperature to the cryogenic temperature part. This has the effect of improving the insulation efficiency of cryogenic equipment.
本発明によれば、断熱部材の内部が真空になっているの
で極低温１１１Ｈの常温からの低温部への侵入熱を低減
できる効果がある。According to the present invention, since the inside of the heat insulating member is in a vacuum, there is an effect of reducing the intrusion of heat from the normal temperature of the cryogenic temperature 111H into the low temperature part.
また、侵入熱を低減できるので極低温機器の断熱効率を
良鴫する効果があり、冷凍システムの効率を向上できる
効果もある。Furthermore, since the intrusion heat can be reduced, it has the effect of improving the insulation efficiency of cryogenic equipment, and has the effect of improving the efficiency of the refrigeration system.
！１図は本発明の一実施例のヘリウムブロワ−の縦断面
図、第２図は第１図の断熱部材の構造図、第３図は本発
明のｆＥ２の実施例の断熱部材の構造図、第４図および
１１５図は本発明の第３および第４の実施例のヘリウム
ブロワ−の縦断面図である。
６・・・・・・断熱部材、４・・・・・・上板、ｎ・・
・・・・下板、ス・・・・・・内周リング、必・・・・
・・外周リング、加・・・・・・積層封１図
イ Ｚ 目
オ ３ 囚
」
４
図
第
目! 1 is a longitudinal sectional view of a helium blower according to an embodiment of the present invention, FIG. 2 is a structural diagram of the heat insulating member of FIG. 1, and FIG. 3 is a structural diagram of the heat insulating member of the fE2 embodiment of the present invention. 4 and 115 are vertical sectional views of helium blowers according to third and fourth embodiments of the present invention. 6...Insulation member, 4...Top plate, n...
...Lower plate, S...Inner ring, required...
...Outer ring, addition...Laminated seal Figure 1 A Z Eye O 3 Figure 4 Figure 4
Claims (1)
され、前記主軸の一端に流体を膨張させるあるいは圧縮
させるための羽根を設けた極低温回転機器において、低
温部の前記羽根と常温部の軸受部の間に設けた断熱部材
の中を真空構造としたことを特徴とする極低温回転機器
。 ２、前記断熱部材の中に積層断熱材を設けた第１請求項
に記載の極低温回転機器。 ３、極低温回転機器が取り付けられている真空保冷槽と
前記断熱部材が連通する第１請求項に記載の極低温回転
機器。 ４、前記断熱部材が大気との間を連通する構造を有し、
強制的に真空引が行える構造を有する第１請求項に記載
の極低温回転機器。[Claims] 1. In a cryogenic rotating equipment in which a main shaft is supported by a journal bearing and a thrust bearing, and a blade for expanding or compressing fluid is provided at one end of the main shaft, A cryogenic rotating device characterized by having a vacuum structure inside a heat insulating member provided between bearing parts in a normal temperature part. 2. The cryogenic rotating equipment according to claim 1, wherein a laminated heat insulating material is provided in the heat insulating member. 3. The cryogenic rotating equipment according to claim 1, wherein the vacuum cold storage tank to which the cryogenic rotating equipment is attached communicates with the heat insulating member. 4. The heat insulating member has a structure that communicates with the atmosphere,
The cryogenic rotating equipment according to claim 1, having a structure that allows forcible evacuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32598389A JPH03191262A (en) | 1989-12-18 | 1989-12-18 | Very low temperature rotary machinery and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32598389A JPH03191262A (en) | 1989-12-18 | 1989-12-18 | Very low temperature rotary machinery and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03191262A true JPH03191262A (en) | 1991-08-21 |
Family
ID=18182781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32598389A Pending JPH03191262A (en) | 1989-12-18 | 1989-12-18 | Very low temperature rotary machinery and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03191262A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1273857A1 (en) * | 2001-07-06 | 2003-01-08 | Atlas Copco Energas Gmbh | Turbo expander for cryogenic uses |
| EP1975375A3 (en) * | 2007-03-29 | 2013-01-16 | IHI Corporation | Heat insulating structure for expansion turbine, and method of manufacturing the same |
-
1989
- 1989-12-18 JP JP32598389A patent/JPH03191262A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1273857A1 (en) * | 2001-07-06 | 2003-01-08 | Atlas Copco Energas Gmbh | Turbo expander for cryogenic uses |
| US6508619B1 (en) | 2001-07-06 | 2003-01-21 | Atlas Copco Energas Gmbh | Expansion turbine for low-temperature applications |
| EP1975375A3 (en) * | 2007-03-29 | 2013-01-16 | IHI Corporation | Heat insulating structure for expansion turbine, and method of manufacturing the same |
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