JPS5857004A - Stacked rotor - Google Patents

Stacked rotor

Info

Publication number
JPS5857004A
JPS5857004A JP15380581A JP15380581A JPS5857004A JP S5857004 A JPS5857004 A JP S5857004A JP 15380581 A JP15380581 A JP 15380581A JP 15380581 A JP15380581 A JP 15380581A JP S5857004 A JPS5857004 A JP S5857004A
Authority
JP
Japan
Prior art keywords
wheels
wheel
stacked
rotor
circumferential surface
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.)
Granted
Application number
JP15380581A
Other languages
Japanese (ja)
Other versions
JPH0353441B2 (en
Inventor
Haruo Miura
治雄 三浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15380581A priority Critical patent/JPS5857004A/en
Publication of JPS5857004A publication Critical patent/JPS5857004A/en
Publication of JPH0353441B2 publication Critical patent/JPH0353441B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02Blade-carrying members, e.g. rotors
    • F01D5/06Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections

Abstract

PURPOSE:To prevent any increase of unbalance owing to a high speed rotation in a stacked rotor employed for an axial machine, by mounting keys on the contact surface between both adjacent wheels and on the contact surface between said wheels and stacking bolts which combines those wheels together. CONSTITUTION:A movable blade 3 is mounted on the outer periphery of a wheel 1. A plurality of said wheels 1 are stacked in an axial direction and each of said wheels 1 is clamped by means of a plurality of stacking bolts 2 having end pieces at the both ends thereof and penetrating through bolt apertures 4 of a contact surface 5. In this case, at least three grooves 6 are formed in a radial and circumferential direction by equal spaces on each of contact surfaces 5 between the adjacent wheels 1 and then, keys 7 are inserted into each of grooves 6, respectively, thereby restricting a relative deviation of each wheel 1 in the circumferential direction and preventing the adjacent wheels 1 from displacing relatively in the axial direction before and after the rotor is rotated. Thus, an increase of the unbalance owing to a high speed rotation is prevented and a radial vibration is reduced.

Description

【発明の詳細な説明】 本発明は軸流圧縮機、軸流タービンなどの軸流機械に使
用されるスタックドロータに関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stacked rotor used in axial flow machines such as axial flow compressors and axial flow turbines.

従来のこの種スタックドロータの典型例は第1図に示す
ように、外周面に動翼3を装着したホイールlを軸方向
に被数枚重ね合せ、これらのホイール1を両端にエンド
ピース(図示せず)有する複数本のスタッキングボルト
2によシ締付けて一体に結合して構成されている。すな
わちホイールlは第2図に示すように、その接合面50
円周方向にスタッキングボルト穴4が等間隔に任意数設
けられており、これらの各ボルト穴4にスタンキングボ
ルト2を貫通してホイールlを締付けると、相隣るホイ
ールlの接合面は互に圧接されて血圧を生じて一体に結
合される。このようにしてスタックドロータは組立てら
れ、バランス修正を行った後に軸流機械に組込まれてい
る。
A typical example of a conventional stacked rotor of this kind is, as shown in Fig. 1, in which several wheels 1 each having moving blades 3 attached to their outer peripheral surfaces are stacked in the axial direction, and these wheels 1 are attached to end pieces (see Fig. 1) at both ends. (not shown) are integrally connected by tightening with a plurality of stacking bolts 2. That is, the wheel l has its joint surface 50 as shown in FIG.
An arbitrary number of stacking bolt holes 4 are provided at equal intervals in the circumferential direction, and when a stacking bolt 2 is passed through each of these bolt holes 4 and a wheel l is tightened, the joint surfaces of adjacent wheels l are mutually connected. are pressed together to generate blood pressure and are joined together. The stacked rotor is assembled in this manner, and after the balance is corrected, it is assembled into an axial flow machine.

上記のような構造のスタックドロータでは、駆動機(図
示せず)の駆動トルクは一方側のエンドピースから相隣
るホイールへ、このホイールから順次に他方側のホイー
ルへと各接合部の摩擦力により伝達される。
In a stacked rotor with the above structure, the drive torque of the drive machine (not shown) is applied from one end piece to the adjacent wheel, and from this wheel to the other wheel in turn, the friction force at each joint is applied. transmitted by.

上記ホイール1には半径方向の位置決めのためにインロ
ー6が設けられているが、スタッキングボルト2の締付
量のばらつき、ホイール接合向5の加工精度および粗さ
の僅かな差異のため、高速(ロ)転時の大きな遠心力負
荷により、マクロ的には相対滑シを生じない接合面がミ
クロ的には半径方向に滑る。このため静的バランス修正
およヒ低速の動的バランス修正を行っても、一度一連運
転を行うと、大きなアンバランスを生ずる恐れがある。
The wheel 1 is provided with a spigot 6 for positioning in the radial direction. b) Due to the large centrifugal force load during rolling, the joint surfaces, which do not cause relative slippage from a macroscopic perspective, slip in the radial direction from a microscopic perspective. For this reason, even if static balance correction and low-speed dynamic balance correction are performed, once a series of operations is performed, a large imbalance may occur.

このようにアンバランスを生ずると、スタックドロータ
の半径方向の振動が大きくなシ、ロータとステータとの
接触および軸受損傷などの危険性が増大してプラントの
運転に支障を生ずる。前記軸振動は流体機械の重大故障
に最も深い関係を有する物理的現象であるので、その振
動を小さくする丸めにロータのバランス修かに多大の労
力と熟練を要1する。
When this imbalance occurs, the radial vibration of the stacked rotor becomes large, and the risk of contact between the rotor and stator and damage to the bearings increases, which impedes the operation of the plant. Since the shaft vibration is a physical phenomenon that is most closely related to serious failures in fluid machinery, it requires a great deal of effort and skill to balance the rotor in order to reduce the vibration.

本発明は上記にかんがみ高速回転によるアンバランスの
増加を防ぎ、半径方向の振動を小さくすることを目的と
するもので、各ホイールの円周方向の相対的ずれを拘束
することにょシ、ロータの回転前後で相対位置が変化し
ないようにしたものである。
In view of the above, the present invention aims to prevent an increase in unbalance due to high-speed rotation and to reduce vibration in the radial direction. The relative position does not change before and after rotation.

以下本発明の実施例を図面について説明する。Embodiments of the present invention will be described below with reference to the drawings.

第3図および第4図において、外周面に動翼3を装着し
たホイール1は、流体仕様から要求される枚数だけ軸方
向に1ね合わされ、その接合面5のボルト穴4を貫通す
るスタッキングボルト2により締付けられて、相隣るホ
イール1の各接合面5が互に圧接されている。その接合
面5には少くとも3個(図では8個)の溝6が半径方向
にかつ円周方向に等間隔に設けられ、これらの#l!6
にキー7がそれぞれ挿入されている。
In FIGS. 3 and 4, a wheel 1 with rotor blades 3 mounted on its outer circumferential surface is mated together in the axial direction in the number required by the fluid specifications, and stacking bolts are inserted through bolt holes 4 in the joint surface 5. 2, and the joint surfaces 5 of adjacent wheels 1 are pressed against each other. At least three (eight in the figure) grooves 6 are provided on the joint surface 5 at equal intervals in the radial direction and in the circumferential direction, and these #l! 6
A key 7 is inserted in each.

本実施例では、上記のようにキー7をホイール1の接合
面5に8個設け、しかも軸心に対して対称的に設けたの
で、前記接合面5が局部的に変形して本完全に二次元平
面内で、相隣る両ホイール1間の相対的位置をより一層
に確実に保持することができる。ところがキー7は最小
限3個設けることにより、ホイール1の横断面を二次元
平面としたときに、この二次元平面上で相隣る両ホイー
ル1の相対的位置を固定することが可能である。
In this embodiment, eight keys 7 are provided on the joint surface 5 of the wheel 1 as described above, and they are also provided symmetrically with respect to the axis. The relative position between both adjacent wheels 1 can be maintained even more reliably within a two-dimensional plane. However, by providing at least three keys 7, when the cross section of the wheel 1 is a two-dimensional plane, it is possible to fix the relative positions of both adjacent wheels 1 on this two-dimensional plane. .

上記キー7の取付方法を第5図について詳述する。同図
はスタッキングボルトを締付ける以萌の状態において、
キー7の取付部を半径方向から見たものである。
The method of attaching the key 7 will be described in detail with reference to FIG. The figure shows the state in which the stacking bolts are being tightened.
The mounting portion of the key 7 is viewed from the radial direction.

相隣るホイールIA、 1f:lの各接合面5A、5B
に設けられた溝6A、6Bは、その内周面が接合面5A
、 5Bに対して垂直ではなく、僅かに傾斜したテーパ
面(傾斜角θ)に形成されている。またその溝6A。
Each joint surface 5A, 5B of adjacent wheels IA, 1f:l
The inner peripheral surfaces of the grooves 6A and 6B provided in the joint surface 5A are
, 5B, and is formed with a slightly inclined taper surface (inclination angle θ) rather than perpendicular to 5B. Also, the groove 6A.

6Bに挿入されたキー7も、その外周面が溝6A、6B
のテーパ面と同様なテーパを有するように形成さ□れて
いる。
The key 7 inserted in 6B also has its outer peripheral surface in grooves 6A and 6B.
It is formed to have a taper similar to the tapered surface of .

上記キー7を溝6A、 6B内に挿入してホイールIA
、IBを組合せた場合、押付力がない状態でキー7が溝
6A、6Bに接触したときに、ホイールIA、 IBの
接合面5A、5B間にすき間δを生ずるように構成され
ている。そのすき間δは、運転中の遠心力による溝6A
、6Bの変形および偏心量がキー7の弾性変形内に納ま
るように設定されている。
Insert the key 7 into the grooves 6A and 6B and turn the wheel IA.
, IB, when the key 7 contacts the grooves 6A, 6B without any pressing force, a gap δ is created between the joint surfaces 5A, 5B of the wheels IA, IB. The gap δ is caused by the groove 6A due to centrifugal force during operation.
, 6B are set so that the deformation and eccentricity of the keys 7 are within the range of elastic deformation of the key 7.

本実施例は上記のように構成したので、伝達トルクを伝
達できる締付力および軸剛性すなわち軸□の剛性を大に
して固有振動数を上げ、振動しないだけの剛体から要求
される締付力のいずれか大きい方の給付力によりホイー
ルIA、 IBを第5図に示す状態から締付ければ、接
合面5A、 5Bが接合する組立状態はもちろん、運転
中においてもキー7の外周面と#$6の内周面との間に
すき間を生ずる恐れはない。したがって相隣るホイール
の相対位置を静止中および回転中のいずれにおいても同
一に保って半径方向にずれるのを防止することができる
Since this embodiment is configured as described above, the clamping force that can transmit the transmission torque and the shaft rigidity, that is, the rigidity of the shaft □, are increased to increase the natural frequency, and the clamping force required from a rigid body that does not vibrate is achieved. If wheels IA and IB are tightened from the state shown in Fig. 5 with the force applied by whichever is greater, the outer circumferential surface of key 7 and There is no fear that a gap will be created between the inner peripheral surface of 6 and the inner peripheral surface of 6. Therefore, the relative positions of adjacent wheels can be kept the same both when stationary and when rotating, and can be prevented from shifting in the radial direction.

本実施例は、伝達トルクを基本的にはホイール1の接合
面5の摩擦力によシ伝達するようにしたもので、キー7
で分担させるものではない。したがってキー7には第5
図に示すように溝6の底部に対向する面にスリット8を
設けることにより、δ量の押込みによるキー7の反撥力
を緩和し、キー7近傍のホイール接合面の締付面圧の低
下を防止することができる。この場合、キー7の断面積
が十分に大きい中央部により、ホイールの変形を半径方
向にガイドするので、キー7により相隣るホイールが半
径方向にずれるのを防止することができる。
In this embodiment, the transmission torque is basically transmitted by the frictional force of the joint surface 5 of the wheel 1, and the key 7
It is not something that should be shared. Therefore, key 7 has the fifth
As shown in the figure, by providing a slit 8 on the surface facing the bottom of the groove 6, the repulsive force of the key 7 due to the pushing amount δ is alleviated, and the tightening surface pressure on the wheel joint surface near the key 7 is reduced. It can be prevented. In this case, since the central portion of the key 7 having a sufficiently large cross-sectional area guides the deformation of the wheel in the radial direction, the key 7 can prevent adjacent wheels from shifting in the radial direction.

第6図は本発明の他の実施例の要部を示すもので、相隣
邊ホイールIA、 1Hの一方例えはホイール1人の接
合面5Aに内周thi金傾斜傾斜面成した凹部10を設
けると共に、他方のホイール113(2)恢合向5Bに
前記凹部10と同一テーパの外周面を有する凸部5Aを
設け、この凸部5Aを凹部5Bに挿入するようにしたも
のである。その他の構成は第3図および第4図に示す前
記実施例と同一であるから図面および説明を省略する。
FIG. 6 shows the main part of another embodiment of the present invention, in which one of the adjacent wheels IA, 1H has a concave portion 10 with an inner periphery thi gold sloped surface formed on the joint surface 5A of one wheel. In addition, a convex portion 5A having the same taper outer peripheral surface as the concave portion 10 is provided on the other wheel 113(2) in the mating direction 5B, and this convex portion 5A is inserted into the concave portion 5B. The rest of the structure is the same as that of the embodiment shown in FIGS. 3 and 4, so drawings and explanations will be omitted.

このように構成した本実施例によれば、前記実施例と同
様な効果をうろことができる。
According to this embodiment configured in this way, the same effects as those of the previous embodiment can be obtained.

以上説明したように本発明によれば、各ホイールの円周
方向の相対ずれを拘束することによシ、ロータの回転前
後で相隣るホイールが半径方向に相対的に変位するのを
防止することができる。また高速回転によるアンバラン
スの増加を防ぎ、ロータの半径方向の振動を小さくする
ことができるので、ロータとステータとの接触、軸受お
よび動翼の損傷を防止し安全性を向上させることができ
る。
As explained above, according to the present invention, by restraining the relative displacement of each wheel in the circumferential direction, relative displacement of adjacent wheels in the radial direction before and after rotation of the rotor is prevented. be able to. Furthermore, since it is possible to prevent an increase in unbalance due to high-speed rotation and to reduce vibrations in the radial direction of the rotor, it is possible to prevent contact between the rotor and stator and damage to the bearings and rotor blades, thereby improving safety.

【図面の簡単な説明】[Brief explanation of drawings]

第1図および第2図は従来のスタックドロータの切断斜
視図および同ホイールの正面図、第3図および第4図は
本発明のスタックドロータの一実施例を示す縦断面図お
よび同ホイールの正面図、第5図は同実施例のホイール
接合面の半径方向に垂直な断面図、第6図は本発明に係
わる他の*流側のホイール接合面の半径方向に垂直な断
面図である。 1・・・ホイール、2・・・スクッキングボルト、5・
・・接電、面、6・・・溝、7・・・キー、8・・・ス
リット。 代理人 弁理士    秋  本  正  実第1図 第2図 第3図 第4図 乙 第51jA 第6図
1 and 2 are a cutaway perspective view of a conventional stacked rotor and a front view of the same wheel, and FIGS. 3 and 4 are a vertical sectional view and a front view of the same wheel showing an embodiment of the stacked rotor of the present invention. 5 is a cross-sectional view perpendicular to the radial direction of the wheel joint surface of the same embodiment, and FIG. 6 is a cross-sectional view perpendicular to the radial direction of another *stream side wheel joint surface according to the present invention. 1...Wheel, 2...Scooking bolt, 5.
...Electrical connection, surface, 6...groove, 7...key, 8...slit. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2 Figure 3 Figure 4 Figure Otsu No. 51jA Figure 6

Claims (1)

【特許請求の範囲】 1、外周面に動翼を装着したホイールを軸方向に複数枚
重ね合せ、これらのホイールを両端ニ工yドビースを有
する複数本のスタキングボルトにより結合してなるスタ
ックドロータにおいて、前記相隣る両ホイールおよび前
記エンドビーストホイールの各接合面に、少くとも3個
の壽を半径方向にかつ円周方向に等間隔に設け、これら
の隣にキーを挿入したことを特徴とするスタックドロー
タ。 2、上記溝の内周面およびキーの外周面を傾斜預に形成
すると共に、溝底部に対向するキー外周面にスリットを
設けたことを特徴とする特許請求の範囲第1項記載のス
タックドロータ。 3、外周面に動翼を装着したホイールを軸方向にha枚
車ね合せ、これらのホイールを両A’にエンドピースを
有するスタッキングボルトにより私人 1  / 屹 
フ + J)  −y  )I  L”  ++   
  4+  1f J、1.+  イ   具d H−
★H鴎)る両ホイールおよび前記エンドピースとホイー
ルの各接合面の一方に凸部を、他方に凹部をそれぞれ半
径方向にかつ円周方向に等間隔に設け、前記凹凸部を互
に係合させたことを特徴とするスタックドロータ。 4、上記凹部の内周面および凸部の外周面を傾゛斜面に
形成すると共に1前記凸部の頂面にスリットを設けたこ
とを特徴とする特許請求の範囲第3項記載のスタックド
ロータ。
[Claims] 1. A stacked rotor in which a plurality of wheels each having rotor blades attached to the outer circumferential surface are stacked in the axial direction, and these wheels are connected by a plurality of stacking bolts having kneaded beads at both ends. , characterized in that at least three jugs are provided at equal intervals in the radial direction and circumferential direction on each joint surface of the two adjacent wheels and the end beast wheel, and a key is inserted next to these. Stacked rotor. 2. The stacked rotor according to claim 1, wherein the inner circumferential surface of the groove and the outer circumferential surface of the key are formed to be inclined, and a slit is provided on the outer circumferential surface of the key facing the groove bottom. . 3. Align the wheels with rotor blades attached to the outer circumferential surface in the axial direction, and connect these wheels with stacking bolts with end pieces on both A'.
F + J) -y) I L” ++
4+ 1f J, 1. + A tool d H-
★Providing convex portions on one side of both the wheels and the joint surfaces of the end piece and the wheel, and recessed portions on the other side at equal intervals in the radial direction and the circumferential direction, and the concave and convex portions are engaged with each other. A stacked rotor characterized by: 4. The stacked rotor according to claim 3, wherein the inner circumferential surface of the recess and the outer circumferential surface of the convex portion are formed as inclined surfaces, and 1. a slit is provided on the top surface of the convex portion. .
JP15380581A 1981-09-30 1981-09-30 Stacked rotor Granted JPS5857004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15380581A JPS5857004A (en) 1981-09-30 1981-09-30 Stacked rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15380581A JPS5857004A (en) 1981-09-30 1981-09-30 Stacked rotor

Publications (2)

Publication Number Publication Date
JPS5857004A true JPS5857004A (en) 1983-04-05
JPH0353441B2 JPH0353441B2 (en) 1991-08-15

Family

ID=15570501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15380581A Granted JPS5857004A (en) 1981-09-30 1981-09-30 Stacked rotor

Country Status (1)

Country Link
JP (1) JPS5857004A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031400A (en) * 1988-12-09 1991-07-16 Allied-Signal Inc. High temperature turbine engine structure
US6648540B2 (en) * 2001-09-14 2003-11-18 General Electric Co. Rabbet plate for coupling rotors
EP3130749A1 (en) * 2015-07-21 2017-02-15 General Electric Company Patch ring for a compressor and method for installing same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51324A (en) * 1974-06-19 1976-01-06 Matsushita Electric Ind Co Ltd
JPS5471215A (en) * 1977-10-17 1979-06-07 Gen Electric Rotor disc coupling device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51324A (en) * 1974-06-19 1976-01-06 Matsushita Electric Ind Co Ltd
JPS5471215A (en) * 1977-10-17 1979-06-07 Gen Electric Rotor disc coupling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031400A (en) * 1988-12-09 1991-07-16 Allied-Signal Inc. High temperature turbine engine structure
US6648540B2 (en) * 2001-09-14 2003-11-18 General Electric Co. Rabbet plate for coupling rotors
EP3130749A1 (en) * 2015-07-21 2017-02-15 General Electric Company Patch ring for a compressor and method for installing same
US9909595B2 (en) 2015-07-21 2018-03-06 General Electric Company Patch ring for a compressor

Also Published As

Publication number Publication date
JPH0353441B2 (en) 1991-08-15

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