JPH0633800B2 - Centrifugal impeller blade tip clearance controller - Google Patents
Centrifugal impeller blade tip clearance controllerInfo
- Publication number
- JPH0633800B2 JPH0633800B2 JP1188881A JP18888189A JPH0633800B2 JP H0633800 B2 JPH0633800 B2 JP H0633800B2 JP 1188881 A JP1188881 A JP 1188881A JP 18888189 A JP18888189 A JP 18888189A JP H0633800 B2 JPH0633800 B2 JP H0633800B2
- Authority
- JP
- Japan
- Prior art keywords
- movable casing
- casing
- blade tip
- impeller
- compressor
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/622—Adjusting the clearances between rotary and stationary parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は高温ガス或は蒸気によるタービン駆動のオープ
ン形遠心羽根車圧縮機に関するものである。TECHNICAL FIELD The present invention relates to an open type centrifugal impeller compressor driven by a turbine using hot gas or steam.
従来、高温ガス或は蒸気によるタービン駆動圧縮機にお
いては、タービン翼車部分が高温となるためその回転軸
は熱膨張する。したがって回転軸に直結された圧縮機の
場合は羽根車翼端がケーシングの一部に接触するおそれ
があるために翼端隙間を十分にとっていた。あるいは、
タービン回転軸と圧縮機回転軸とを分離し、両者を軸継
手で連結することによって、タービン回転軸の熱膨張を
軸継手部分で逃がし圧縮機側に影響させないようにして
いた。Conventionally, in a turbine-driven compressor using high-temperature gas or steam, the temperature of the turbine impeller portion becomes high, so that the rotating shaft thereof thermally expands. Therefore, in the case of a compressor directly connected to the rotating shaft, the impeller blade tip may come into contact with a part of the casing, so that the blade tip clearance is sufficiently secured. Alternatively,
By separating the turbine rotary shaft and the compressor rotary shaft and connecting them by a shaft joint, the thermal expansion of the turbine rotary shaft is escaped at the shaft joint portion so as not to affect the compressor side.
前記の羽根車翼端隙間を十分とる場合は、タービン回転
軸の熱膨張による伸びは温度により変化するため羽根車
翼端隙間が大きいときは羽根車の性能が低下するという
欠点が、また軸継手を使用する場合は軸受の数が増加
し、全体構造も大きくなり、機械的損失も増大するとい
う欠点があった。When a sufficient clearance is provided for the impeller blade tip, the expansion due to thermal expansion of the turbine rotary shaft changes with temperature, so the performance of the impeller is reduced when the impeller blade tip clearance is large, and the shaft coupling However, there is a drawback in that the number of bearings is increased, the overall structure is increased, and the mechanical loss is increased.
本発明は前記のような欠点を除去するために、タービン
翼車に直接圧縮機を連結し、しかも回転軸の熱膨張によ
る圧縮機の悪影響も排除したものである。In order to eliminate the above-mentioned drawbacks, the present invention directly connects the compressor to the turbine wheel and eliminates the adverse effects of the compressor due to the thermal expansion of the rotating shaft.
本発明は、オープン形の遠心羽根車の翼端部に対向する
ケーシング部分を羽根車回転軸の軸方向に移動可能で調
節操作装置を設けた可動ケーシングとし、該調節操作装
置は、可動ケーシングの端部を摺動リングの凹溝に嵌合
し、可動ケーシングを周方向に等間隔に分割して、これ
らを軸方向移動および傾斜可能とすると共に、各分割可
動ケーシングに作動シリンダーのピストン連結棒の先端
を連結して構成され、前記可動ケーシングと羽根車翼端
との隙間検出器を設け、該検出器の検出値と設定基準値
とを比較して最適隙間となるよう可動ケーシングを移動
制御するようにしたものである。The present invention provides a movable casing, which is movable in the axial direction of the impeller rotating shaft and has an adjusting operation device, in which the casing portion of the open type centrifugal impeller facing the blade end is a movable casing. The ends are fitted into the grooves of the sliding ring, and the movable casing is divided at equal intervals in the circumferential direction so that these can be moved and tilted in the axial direction. Is provided with a gap detector between the movable casing and the impeller blade tip, and the movable casing is controlled to move so as to obtain an optimum gap by comparing a detection value of the detector with a set reference value. It is something that is done.
タービン翼車回転軸に直結された圧縮機の遠心羽根車
は、該回転軸の熱膨張により軸方向に移動する。このた
め、圧縮機ケーシングのうち羽根車翼端と対向している
部分を等間隔に分割した可動ケーシングとして、これら
を軸方向に移動及び傾斜自在に支持し、この羽根車翼端
と可動ケーシングとの隙間を検知するための検出器を適
所に配備して、常時隙間を検知し、この検出値と設定基
準値とを比較して最適隙間となるように調節操作装置を
作動させて各可動ケーシングを軸方向に移動及び傾斜さ
せるものである。したがって、圧縮機の羽根車翼端隙間
はタービン翼車回転軸の熱膨張による伸びが変化しても
常に設定基準値に維持され高効率の状態で圧縮機は運転
される。The centrifugal impeller of the compressor directly connected to the rotating shaft of the turbine impeller moves in the axial direction due to thermal expansion of the rotating shaft. For this reason, the portion of the compressor casing facing the impeller blade tip is divided into equal parts, and the movable casing is supported so as to be movable and tiltable in the axial direction. A detector for detecting the gap between the movable casings is installed at appropriate places, the gap is constantly detected, and the detected value is compared with the set reference value to operate the adjustment operation device so as to obtain the optimum gap. Is moved and tilted in the axial direction. Therefore, the impeller blade tip clearance of the compressor is always maintained at the set reference value even if the expansion due to the thermal expansion of the turbine impeller rotary shaft changes, and the compressor is operated in a highly efficient state.
本発明の好適な実施例を図面にもとづいて説明する。 A preferred embodiment of the present invention will be described with reference to the drawings.
第１図は燃料電池電力設備における廃ガス利用のタービ
ン駆動圧縮機に本発明を応用した一例を示すものであっ
て、タービン翼車回転軸１の両端に第１段および第２段
圧縮機２，３の羽根車４を固着し、各圧縮機２，３は圧
縮機ケーシング５，インレットベーン６を備えている。
第１段圧縮機２の出口は中間冷却器（図示せず）を介し
て第２圧縮機３の入口に連結されている。タービン翼車
回転軸１は、第１段圧縮機２側ではラジアルおよびスラ
スト軸受７で、また第２段圧縮機３側ではラジアル軸受
８で支承されている。タービン翼車回転軸１は第１段圧
縮機２側でスラスト軸受で支承されているから、熱膨張
による伸びは第２段圧縮機３側方向であるので、第２段
圧縮機３の羽根車４は左方向に移動する。そのために羽
根車４翼端に対向する圧縮機ケーシング部分を周方向に
等間隔に分割した可動ケーシング９とし、各可動ケーシ
ング９は各調節操作装置１０によって、回転軸１の軸方
向に移動および傾斜するように操作され、羽根車翼端と
可動ケーシング９との隙間を調節するようにされてい
る。またこの翼端隙間を検出するため検出器１１が可動
ケーシング９とか、圧縮機ケーシング５の一部等に設け
られている。この検出器１１としてはインダクタンス型
センサが使用される。FIG. 1 shows an example in which the present invention is applied to a turbine-driven compressor using waste gas in a fuel cell power facility, in which first-stage and second-stage compressors 2 are provided at both ends of a turbine impeller rotating shaft 1. , 3 are fixed, and each of the compressors 2 and 3 includes a compressor casing 5 and an inlet vane 6.
The outlet of the first stage compressor 2 is connected to the inlet of the second compressor 3 via an intercooler (not shown). The turbine impeller rotating shaft 1 is supported by a radial and thrust bearing 7 on the first stage compressor 2 side and a radial bearing 8 on the second stage compressor 3 side. Since the turbine impeller rotating shaft 1 is supported by the thrust bearing on the first stage compressor 2 side, the expansion due to thermal expansion is in the second stage compressor 3 side direction, so the impeller of the second stage compressor 3 is 4 moves to the left. Therefore, the compressor casing portion facing the blade tips of the impellers 4 is divided into circumferentially equally spaced movable casings 9, and each movable casing 9 is moved and tilted in the axial direction of the rotary shaft 1 by each adjustment operation device 10. To adjust the clearance between the impeller blade tip and the movable casing 9. Further, a detector 11 is provided in the movable casing 9 or a part of the compressor casing 5 for detecting the blade tip clearance. An inductance type sensor is used as the detector 11.
次に、第２図にもとづいて調節操作装置１０の具体例を
説明すると、可動ケーシング９は周方向に等間隔で複数
に分割されており、羽根車入口側において、摺動リング
１２の内周面に凹溝を設け、この凹溝に可動ケーシング
９に設けた球面状部13を嵌合すると共に、作動シリンダ
１４のピストン１５の連結棒１６の先端に可動ケーシン
グ９の作動杆１７の先端をピン結合１８し、作動シリン
ダ１４の端部にカバー体１９を設けたものである。Next, a specific example of the adjustment operation device 10 will be described with reference to FIG. 2. The movable casing 9 is divided into a plurality of parts at equal intervals in the circumferential direction, and the inner circumference of the sliding ring 12 is located on the impeller inlet side. A concave groove is provided on the surface, the spherical portion 13 provided on the movable casing 9 is fitted into the concave groove, and the tip of the operating rod 17 of the movable casing 9 is attached to the tip of the connecting rod 16 of the piston 15 of the operating cylinder 14. A pin body 18 is provided and a cover body 19 is provided at the end of the working cylinder 14.
圧縮機ケーシングはタービンケーシングと接続している
からタービンケーシングの熱変形が円周方向で一様でな
いため圧縮機ケーシングもその影響を受けることとな
り、そのために翼端隙間が円周方向に均一でなくなる。
そのために可動ケーシング９を軸方向移動に加えて傾斜
させて円周方向の翼端隙間を均一にする。このような制
御をするために、作動シリンダおよび検出器は少なくと
も等間隔に３ケ所設け、可動ケーシング９の羽根車入口
側では摺動リング１２の凹溝に球面状部１３を嵌合させ
θ方向の傾斜を許すようにし、作動杆１７と連結棒１６
とをピン結合した。Since the compressor casing is connected to the turbine casing, the thermal deformation of the turbine casing is not uniform in the circumferential direction, so the compressor casing is also affected by it, and therefore the blade tip clearance is not uniform in the circumferential direction. .
Therefore, the movable casing 9 is tilted in addition to the axial movement to make the blade tip clearance in the circumferential direction uniform. In order to perform such control, the operating cylinder and the detector are provided at at least three locations at equal intervals, and the spherical portion 13 is fitted in the concave groove of the sliding ring 12 on the impeller inlet side of the movable casing 9 in the θ direction. Of the operating rod 17 and the connecting rod 16
Pin-coupled with.
なお、摺動リング１２と球面状部１３は可動ケーシング
９の羽根車入口側に設けたものを示したが、これは羽根
車出口側に設けてもよい。Although the sliding ring 12 and the spherical portion 13 are provided on the impeller inlet side of the movable casing 9, they may be provided on the impeller outlet side.
前記検出器１１の設置個所の具体例は第２図に１１１〜
１１４で示したとおりで、これら複数個所に設けた検出
器の個々を複数の可動ケーシング９の個々に連係させる
と共に、各検出器により翼端隙間を常時検出しており、
この検出値と設定基準値とを比較して適正隙間を維持す
るように各調節操作装置１０が個別に操作されるもので
ある。すなわち、カバー体１９から油または空気を供給
しピストンを前進させて作動杆１７を作動させ各可動ケ
ーシング９を軸方向に移動及び傾斜させる。この結果、
羽根車翼端隙間が調節されるものである。この場合検出
器１１１は隙間を直接的に検知しているが、他は間接的
に検知している。Specific examples of the installation location of the detector 11 11 1 in Figure 2
Were as shown in 11 4, together to coordinate the individual detectors provided thereto a plurality of locations in each of a plurality of movable casing 9, which detects the tip clearance at all times by each detector,
Each adjustment operating device 10 is individually operated so as to compare the detected value with the set reference value and maintain an appropriate gap. That is, oil or air is supplied from the cover body 19 and the piston is moved forward to operate the operating rod 17 to move and tilt each movable casing 9 in the axial direction. As a result,
The impeller blade tip clearance is adjusted. Although this detector 11 1 is directly sense the gap and the other is indirectly detected.
本発明は圧縮機ケーシングにおいて、羽根車翼端と対向
する部分を可動ケーシングとし、これを周方向に等間隔
に分割し各分割可動ケーシングを圧縮機回転軸方向に移
動及び傾斜自在とし、一方、この可動ケーシングと羽根
車翼端との隙間を検知するための隙間検出器を配備し、
この検出値とこの隙間の設定基準値とを比較して、常に
適正隙間を維持するように各調節操作装置により可動ケ
ーシングを３次元的に移動制御するようにしたから、例
えばタービン駆動回転軸が熱膨張して羽根車翼端と可動
ケーシングとの隙間が変化してもこの変化に従動して常
にその隙間を適正に維持できるから圧縮機はどのような
状態においても高効率状態で運転ができるものである。The present invention, in the compressor casing, a portion facing the impeller blade tip is a movable casing, which is divided at equal intervals in the circumferential direction to make each divided movable casing movable and tiltable in the direction of the compressor rotation axis. A gap detector is installed to detect the gap between the movable casing and the impeller blade tip,
This detected value is compared with the set reference value of this gap, and the movable casing is three-dimensionally moved and controlled by each adjustment operation device so that an appropriate gap is always maintained. Even if the gap between the impeller blade tip and the movable casing changes due to thermal expansion, the change can be followed and the gap can always be maintained appropriately, so the compressor can be operated in a highly efficient state in any state. It is a thing.
第１図は本発明装置を廃ガスタービン駆動圧縮機に適用
した場合の一部縦断面図、第２図は本発明装置の要部を
示す一部縦断側面図である。 １……タービン翼車回転軸、２……第１段圧縮機、３…
…第２段圧縮機、４……羽根車、５……圧縮機ケーシン
グ、６……インレットベーン、７……ラジアル及びスラ
スト軸受、８……ラジアル軸受、９……可動ケーシン
グ、１０……調節操作装置、１１……検出器、１２……
摺動リング、１３……球面状部、１４……作動シリン
ダ、１５……ピストン、１６……連結棒、１７……作動
杆、１８……ピン結合部、１９……カバー体。FIG. 1 is a partial vertical cross-sectional view when the device of the present invention is applied to a compressor for driving a waste gas turbine, and FIG. 1 ... Turbine impeller rotating shaft, 2 ... First stage compressor, 3 ...
2nd stage compressor, 4 impeller, 5 compressor housing, 6 inlet vane, 7 radial and thrust bearing, 8 radial bearing, 9 movable casing, 10 adjustment Operating device, 11 ... Detector, 12 ...
Sliding ring, 13 ... spherical part, 14 ... operating cylinder, 15 ... piston, 16 ... connecting rod, 17 ... operating rod, 18 ... pin connecting part, 19 ... cover body.
Claims (1)
るケーシング部分を羽根車回転軸の軸方向に移動可能で
調節操作装置を設けた可動ケーシングとし、該調節操作
装置は、可動ケーシングの端部を摺動リングの凹溝に嵌
合し、可動ケーシングを周方向に等間隔に分割して、こ
れらを軸方向移動および傾斜可能とすると共に、各分割
可動ケーシングに作動シリンダーのピストン連結棒の先
端を連結して構成され、前記可動ケーシングと羽根車翼
端との隙間検出器を設け、該検出器の検出値と設定基準
値とを比較して最適隙間となるよう可動ケーシングを移
動させるようにしたことを特徴とする遠心羽根車翼端隙
間制御装置。Claim: What is claimed is: 1. An open type centrifugal impeller, wherein a casing portion facing a blade end is a movable casing which is movable in an axial direction of an impeller rotating shaft and provided with an adjusting operation device, wherein the adjusting operation device is a movable casing. The end of each is fitted into the groove of the sliding ring, the movable casing is divided at equal intervals in the circumferential direction, and these can be moved and tilted in the axial direction, and the pistons of the working cylinder are connected to each divided movable casing. It is configured by connecting the tips of the rods, a gap detector between the movable casing and the impeller blade tip is provided, and the movable casing is moved so that the detected value of the detector and the set reference value are compared to obtain the optimum gap. A centrifugal impeller blade tip clearance control device characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188881A JPH0633800B2 (en) | 1989-07-24 | 1989-07-24 | Centrifugal impeller blade tip clearance controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188881A JPH0633800B2 (en) | 1989-07-24 | 1989-07-24 | Centrifugal impeller blade tip clearance controller |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61085027A Division JPS62243997A (en) | 1986-04-15 | 1986-04-15 | Control device for vane end gap of centrifugal impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0242197A JPH0242197A (en) | 1990-02-13 |
| JPH0633800B2 true JPH0633800B2 (en) | 1994-05-02 |
Family
ID=16231516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1188881A Expired - Lifetime JPH0633800B2 (en) | 1989-07-24 | 1989-07-24 | Centrifugal impeller blade tip clearance controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633800B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58171680A (en) * | 1982-04-01 | 1983-10-08 | Showa Electric Wire & Cable Co Ltd | Withstand voltage tester for switching device of gas insulation |
| JP2529694Y2 (en) * | 1990-08-30 | 1997-03-19 | 株式会社東芝 | Centrifugal compressor |
| DE102015202375A1 (en) * | 2015-02-11 | 2016-08-11 | Robert Bosch Gmbh | Radial compressor, exhaust gas turbocharger and corresponding method for operating a centrifugal compressor |
| US10704560B2 (en) | 2018-06-13 | 2020-07-07 | Rolls-Royce Corporation | Passive clearance control for a centrifugal impeller shroud |
| CN111963470A (en) * | 2020-08-07 | 2020-11-20 | 中国北方发动机研究所(天津) | Turbocharger compressor clearance control device |
-
1989
- 1989-07-24 JP JP1188881A patent/JPH0633800B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0242197A (en) | 1990-02-13 |
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