JPS5965505A - Bearing device for expansion turbine - Google Patents
Bearing device for expansion turbineInfo
- Publication number
- JPS5965505A JPS5965505A JP17612482A JP17612482A JPS5965505A JP S5965505 A JPS5965505 A JP S5965505A JP 17612482 A JP17612482 A JP 17612482A JP 17612482 A JP17612482 A JP 17612482A JP S5965505 A JPS5965505 A JP S5965505A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- bearing housing
- housing
- shaft
- thrust
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
- F01D25/164—Flexible supports; Vibration damping means associated with the bearing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は膨張タービンの軸受装置に係り、特に回転体を
支持する軸受と、この軸受を支持する軸受ハウジングよ
りなる気体軸受とを有する膨張タービンの軸受装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a bearing device for an expansion turbine, and more particularly to a bearing device for an expansion turbine having a bearing for supporting a rotating body and a gas bearing comprising a bearing housing for supporting the bearing. This invention relates to a bearing device.
膨張タービンの軸受装置は回転体を支持している軸受と
、この軸受を支持する軸受ハウジングよりなる気体軸受
とから構′成されている。このように構成された軸受装
置で軸受およＱｊ受ハウジングの材質は強度、摩耗およ
び゛腐食等を考慮して選定されるが、この種低温の流体
を断熱膨張させる膨張タービンにおいては一般にステン
レス銅相が使用されている。A bearing device for an expansion turbine is comprised of a bearing that supports a rotating body and a gas bearing that is made up of a bearing housing that supports this bearing. In a bearing device configured as described above, the material of the bearing and Qj bearing housing is selected taking into consideration strength, wear, corrosion, etc., but in this type of expansion turbine that adiabatically expands low-temperature fluid, stainless steel is generally used. phase is used.
ところでこのような比較的熱伝導率の小さいステンレス
鋼材を軸受および軸受ハウジングに使用しているので、
１１１１１受で発生した熱ｉ、ｔ ｎ１ｌｌ受ハウシツ
クを伝導し難いため軸受ハウシック薔こ大きな温ｍ−勾
配が生じるようになり、軸受ハウジンク薔こ熱変形が生
じ、気体軸受部の軸受隙間に大きな影響を与え、軸受負
荷容量の減少をきたしていた。By the way, since stainless steel material with relatively low thermal conductivity is used for bearings and bearing housings,
Since the heat generated in the 11111 bearing is difficult to conduct through the bearing housing, a large temperature gradient occurs in the bearing housing, causing thermal deformation of the bearing housing, which has a large effect on the bearing clearance of the gas bearing part. This resulted in a decrease in bearing load capacity.
本発明は以上の点に鑑みなされたものであり、その目的
とするところは、軸受ハウジンクの熱変形を防止した膨
張ターピノの軸受装置を提供するにある。The present invention has been made in view of the above points, and an object thereof is to provide a bearing device for an expansion terpino in which thermal deformation of a bearing housing is prevented.
すなわち、本発明は軸受ハウジングを軸受より熱伝導率
の大きい材料で構成したことを特徴とするものである。That is, the present invention is characterized in that the bearing housing is made of a material having higher thermal conductivity than the bearing.
以−Ｆ、図示した実施例に基づいて本発明を説明する。 Hereinafter, the present invention will be explained based on the illustrated embodiments.
第１図には本発明の一実施例が示されている。同図に示
し−であるように高圧で低温のガスは処理流体人口１よ
り流入し、回転体であるシャフト２の一方端に付いてい
るロータ３内で断熱膨張し、より温度が下った低圧のガ
スとして処理流体出口４へ流れる。この場合の仕事量は
シャフト２の他方端に伺いている。Ｚ１ン５が回転する
ことにより吸収される。スうストはシャフト２の中央部
にあるスラストプレート６を介して軸受ハウジンク７お
よびスラスト軸受（軸受ハウジング７のスラストプレー
ト６と対向する面に付いているが図示せず）で支持され
、シャフト２は軸受８ （ジャーナル軸受）によって支
持される。そして軸受ガスは軸受流体人口９より流入し
、軸受室内を通り軸受流体出口１０から排出され、制動
ガスは制動流体入口１１より流入し、ファン５で圧縮さ
れ制動流体出口１２から流出する。FIG. 1 shows an embodiment of the invention. As shown in the figure, high-pressure and low-temperature gas flows in from the processing fluid 1 and expands adiabatically within the rotor 3 attached to one end of the rotating shaft 2, resulting in lower temperature and lower pressure. flows to the processing fluid outlet 4 as a gas. In this case, the amount of work is applied to the other end of the shaft 2. It is absorbed by the rotation of Z1-5. The thrust is supported by the bearing housing 7 and the thrust bearing (attached to the surface facing the thrust plate 6 of the bearing housing 7, but not shown) via the thrust plate 6 in the center of the shaft 2. is supported by bearing 8 (journal bearing). The bearing gas flows in from the bearing fluid port 9, passes through the bearing chamber and is discharged from the bearing fluid outlet 10, and the braking gas flows in from the braking fluid inlet 11, is compressed by the fan 5, and flows out from the braking fluid outlet 12.
このような膨張ターピノが高速で回転している場合のス
ラスト軸受および軸受ハウジング７の熱移動を、その熱
移動について示した第２図および前述の第１図を参照し
ながら説明する。熱移動には第２図に実線の矢印で示し
たようにロータ３側へ伝導する熱量Ｑ１があり、ケーシ
ング１３との移動熱量Ｑ２．Ｑ、があり、７１ン５側か
ら伝導される熱量Ｑ４があり、モして各軸受部（軸受８
およびスラスト軸受）から伝導される各軸受部の発熱量
ＱＢ＋１、Ｑ７等があるが、スラスト軸受および軸受ノ
・ウジング７の温度分布はこれらＱ、からＱ、の熱量の
収支がバランスするような温度となる。The heat transfer of the thrust bearing and the bearing housing 7 when such an expansion terpino rotates at high speed will be explained with reference to FIG. 2, which shows the heat transfer, and the above-mentioned FIG. 1. As for heat transfer, there is an amount of heat Q1 conducted to the rotor 3 side as shown by the solid arrow in FIG. Q, and there is an amount of heat Q4 conducted from the 71 and 5 side, and each bearing part (bearing 8
There is a calorific value QB+1, Q7, etc. of each bearing part conducted from the thrust bearing and thrust bearing), but the temperature distribution of the thrust bearing and bearing nozzle 7 is such that the balance of the heat amount from Q to Q is balanced. becomes.
このような温度分布をする軸受ハウジンク７、に軸受８
より熱伝導率の大きい材料例えば電気鋼を使用したので
、軸受８で発生した熱は軸受ハウジング７をよく伝導す
るようになって、軸受ノ・ウジング７の変形が防止され
る。すなわち電気銅の熱伝導度は２０℃において３００
ＫＣａ１／ｍ・ｈ・℃であり、軸受８および従来の軸受
ハウジングに使用されているステンレス鋼材の５ＵＳ３
０４の熱伝導度は同じく２０℃において１４Ｋｃａｌ／
ｍ・ｈ、・℃であるので、軸受８での発熱量および軸受
ハウジング７の周囲境界条件等を同一とし、伝熱量を１
００ Ｋｃａｌ／ｂ とすれば軸受ハウジング７の単
位長さ当りの温度差は８０８３０４使用の場合で７．１
℃、電気銅使用の場合で０．３３℃となって、軸受ハウ
ジング７の温度分布の変動幅は電気銅を使用した方が５
ＵＳ３０４を使用した場合よりも非常に小さくなる。そ
して熱変形量はＳ ＬＩ ８．３０４の線膨張係数が７
．５Ｘ１０−’％、電気銅のそれが１６ Ｘ １０”−
’ ％ｆｔＯ：）テ、Ｓ Ｕ Ｓ ３０４ 使用０：）
場合力１ｍ当り約０．５ｍｍ＋電気銅使用の場合が１ｍ
当り約０．００５龍となって、電気鋼を使用した方が５
ＴＪＳ３０４を使用した場合よりも格段と小さくなる。The bearing 8 is placed in the bearing housing 7, which has such a temperature distribution.
Since a material with higher thermal conductivity, such as electrical steel, is used, the heat generated in the bearing 8 is well conducted through the bearing housing 7, and deformation of the bearing housing 7 is prevented. In other words, the thermal conductivity of electrolytic copper is 300 at 20°C.
KCa1/m・h・℃, and 5US3 of the stainless steel material used in the bearing 8 and the conventional bearing housing.
The thermal conductivity of 04 is also 14Kcal/at 20℃
Since the temperature is m・h,・℃, the amount of heat generated in the bearing 8 and the surrounding boundary conditions of the bearing housing 7 are the same, and the amount of heat transfer is 1.
00 Kcal/b, the temperature difference per unit length of the bearing housing 7 is 7.1 when using 808304.
℃, when electrolytic copper is used, it is 0.33℃, and the fluctuation range of the temperature distribution of the bearing housing 7 is 5.5℃ when electrolytic copper is used.
It is much smaller than when US304 is used. The amount of thermal deformation is determined by the linear expansion coefficient of SLI 8.304 being 7.
．． 5 x 10-'%, that of electrolytic copper is 16 x 10''-
' %ftO:) Te, SUS 304 use 0:)
Approximately 0.5 mm per meter of force + 1 meter when using electrolytic copper
It is about 0.005 dragon per hit, and it is better to use electric steel.
It is much smaller than when TJS304 is used.
このように軸受ハウジング７の熱変形が小さくなるので
、気体軸受部の軸受隙間すなわちスラスト軸受および軸
受ハウジング７とスラスト、プレート６との間の軸受隙
間が良好に維持され、軸受性能が良好に維持される。Since the thermal deformation of the bearing housing 7 is reduced in this way, the bearing clearance of the gas bearing part, that is, the bearing clearance between the thrust bearing and the bearing housing 7 and the thrust plate 6 is maintained well, and the bearing performance is maintained well. be done.
なお本実施例では軸受ハウジング７に電気銅を使用した
場伺について説明したが、電気銅に限定されるものでは
なぐりん脱酸銅、無酸素銅等を使用しても同様な作用効
果を奏することができる。Although this embodiment describes the case where electrolytic copper is used for the bearing housing 7, the bearing housing 7 is not limited to electrolytic copper, and similar effects can be achieved by using deoxidized copper, oxygen-free copper, etc. be able to.
上述のように本発明は、軸受ハウジンクを軸受より熱伝
導率の大きい材料で構成したので、軸受で発生した熱が
軸受ハウジングをよく伝導するようになって、軸受ハウ
ジングの熱変形が防止されるようになり、軸受ハウジン
グの熱変形を防止した膨張タービンの軸受装置を得るこ
とができる。As described above, in the present invention, the bearing housing is made of a material with higher thermal conductivity than the bearing, so the heat generated in the bearing is well conducted through the bearing housing, and thermal deformation of the bearing housing is prevented. Thus, it is possible to obtain a bearing device for an expansion turbine in which thermal deformation of the bearing housing is prevented.
第１図は本発明の膨張ターピノの軸受装置の一実施例の
縦断側面図、第２図は四じ〈一実施例の軸受ハウジング
の熱移動を示す説明図である。
２・・・・・・シャフト （回転体）、６・・・・・ス
ラストプレート、７・・・・・軸受ハウジング（気体軸
受）、８・・・・・・軸受
代理人 升理士 薄 １）利 宰
３Ｉ−１図
才２図FIG. 1 is a longitudinal sectional side view of one embodiment of the bearing device for an expansion terpino according to the present invention, and FIG. 2 is an explanatory diagram showing heat transfer in the bearing housing of the fourth embodiment. 2...Shaft (rotating body), 6...Thrust plate, 7...Bearing housing (gas bearing), 8...Bearing agent Masu Rishi Usui 1) Rizai 3I-1 Illustration 2
Claims (1)
ハウジングよりなる気体軸受とを設けた膨張ターピノの
軸受装置において、前記軸受ノ・ウジノブを前記軸受よ
り熱伝導率の大きい材料で構成したことを特徴とする膨
張タービンの軸受装置。 ２ 前Ｍｅ軸受ノ・ウジノブをりん脱酸銅、電気鋼。 無酸素銅のいずれかで構成した特許請求の範囲第１項記
載の膨張タービンの軸受装置。[Scope of Claims] 1. In an expansion terpino bearing device including a bearing that supports a rotating body and a gas bearing made of a bearing housing that supports this bearing, the bearing knob has a higher thermal conductivity than the bearing. A bearing device for an expansion turbine characterized in that it is made of a large material. 2. The front Me bearing knob is made of phosphor deoxidized copper and electrical steel. A bearing device for an expansion turbine according to claim 1, wherein the bearing device is made of oxygen-free copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17612482A JPS5965505A (en) | 1982-10-08 | 1982-10-08 | Bearing device for expansion turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17612482A JPS5965505A (en) | 1982-10-08 | 1982-10-08 | Bearing device for expansion turbine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31195287A Division JPS63159604A (en) | 1987-12-11 | 1987-12-11 | Bearing device for expansion turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5965505A true JPS5965505A (en) | 1984-04-13 |
Family
ID=16008091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17612482A Pending JPS5965505A (en) | 1982-10-08 | 1982-10-08 | Bearing device for expansion turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5965505A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428978A (en) * | 1977-08-04 | 1979-03-03 | Granbom Bo | Sealing device for pressure fluid cylinder |
-
1982
- 1982-10-08 JP JP17612482A patent/JPS5965505A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428978A (en) * | 1977-08-04 | 1979-03-03 | Granbom Bo | Sealing device for pressure fluid cylinder |
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