WO2017094161A1 - ロータのバランス調整方法 - Google Patents
ロータのバランス調整方法 Download PDFInfo
- Publication number
- WO2017094161A1 WO2017094161A1 PCT/JP2015/083993 JP2015083993W WO2017094161A1 WO 2017094161 A1 WO2017094161 A1 WO 2017094161A1 JP 2015083993 W JP2015083993 W JP 2015083993W WO 2017094161 A1 WO2017094161 A1 WO 2017094161A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- rotor
- impellers
- balance
- adjustment
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000005484 gravity Effects 0.000 claims abstract description 42
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
- F04D29/286—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors multi-stage rotors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating imbalance
- G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
Definitions
- This invention relates to a rotor balance adjustment method.
- a desired output is generated by rotating the rotor at a high speed.
- the vibration of the rotor during operation increases due to the eccentric weight and eccentricity of the rotor.
- balance adjustment is performed so as to suppress unbalance as a rotor to which an impeller or the like is fixed.
- Patent Document 1 describes a method of performing balance adjustment in a state where a pair of impellers are assembled to a rotating shaft that is a rotor of a centrifugal compressor. In this method, each time a set of impellers is attached, the balance of the rotating shaft is adjusted by cutting two different surfaces of the impeller orthogonal to the rotating shaft.
- Patent Document 2 by calculating and using the amount of inclination of the impeller with respect to the rotation axis, only one surface orthogonal to the rotation axis is shaved to adjust the balance of the rotation axis. Thereby, in the balance adjustment method described in Patent Document 2, the surface to be processed is reduced as compared with the balance adjustment method described in Patent Document 1, and the work time required for balance adjustment is shortened.
- some of the impellers may be large impellers that are heavier than other impellers.
- the influence of the large impellers on the rotor is greater than other impellers. That is, there is a possibility that the balance of the rotor is greatly lost due to a slight change in the center of gravity and inclination of the large impeller.
- This invention provides a rotor balance adjustment method capable of performing rotor balance adjustment with high accuracy even when a large impeller is used.
- a rotor balance adjustment method is a rotor balance adjustment method including a rotor body extending in the axial direction and a plurality of impellers fixed to the rotor body.
- the center of gravity of the rotor is adjusted by adjusting the balance with respect to the impeller other than the large impeller.
- the gravity center position of a rotor can be adjusted, without changing the weight of a large impeller. That is, the center of gravity of the rotor can be adjusted without changing the weight of the large impeller that has been adjusted once. Therefore, it is possible to suppress the large impeller from being tilted with respect to the rotor body due to the displacement of the center of gravity of the large impeller itself after adjusting the center of gravity of the rotor.
- the rotor adjustment step is a surface facing the one side in the axial direction of the first impeller which is another impeller other than the large impeller. And a surface of the second impeller different from the first impeller facing the other side in the axial direction may be processed.
- the fixing step includes a first fixing step of fixing the two impellers to the rotor body, and the first fixing.
- the bias of the center of gravity of the rotor can be eliminated once before the large impeller is attached. Therefore, when the large impeller is attached to the rotor body, the influence of impellers other than the large impeller can be suppressed. Therefore, the balance of the rotor can be adjusted so as to efficiently remove the influence of the large impeller.
- the second fixing step includes two positions relative to a position where the large impeller is fixed.
- Another impeller may be fixed on the opposite side in the axial direction so as to sandwich the impeller.
- the rotor balance adjustment method of the present invention even when a large impeller is used, the rotor balance can be adjusted with high accuracy.
- the rotary machine including the rotor 2 adjusted by the rotor balance adjustment method S ⁇ b> 1 in the present embodiment is a multistage centrifugal compressor 1 including a plurality of impellers 4.
- the centrifugal compressor 1 compresses the working fluid.
- the centrifugal compressor 1 includes a rotor 2, a bearing 6, and a casing 7.
- the rotor 2 is rotatable with respect to the casing 7.
- the rotor 2 includes a rotor body 3 and a plurality of impellers 4.
- the rotor body 3 is supported by the bearing 6 so as to be rotatable around the axis O with respect to the casing 7.
- the rotor body 3 has a cylindrical shape with the axis O as the center.
- the rotor body 3 extends in the axial direction Da, which is the direction in which the axis O extends.
- the impeller 4 is attached and fixed to the rotor body 3.
- the impeller 4 compresses the process gas (working fluid) using the centrifugal force generated by the rotation of the rotor body 3.
- the impeller 4 of this embodiment includes a disk 4a, a blade 4b, and a cover 4c. That is, the impeller 4 of the present embodiment is a so-called closed type impeller.
- the disks 4a are each formed in a disk shape that gradually increases in diameter toward the outside in the radial direction Dr of the axis O as it goes in the axial direction Da of the rotor body 3.
- the blade 4b is formed so as to protrude in the axial direction Da from the disk 4a.
- a plurality of blades 4b are formed at predetermined intervals in the circumferential direction of the axis O.
- the cover 4c covers the plurality of blades 4b from the side opposite to the side where the disk 4a in the axial direction Da is disposed.
- the cover 4c is formed in a disk shape facing the disk 4a.
- the cover 4c defines a flow path through which process gas flows by a surface facing the disk 4a and the blade 4b.
- a plurality of impellers 4 are attached to the rotor body 3 between the bearings 6 arranged on both sides of the axial direction Da. These impellers 4 constitute two sets of impeller groups in which the blades 4b face in opposite directions in the axial direction Da.
- the first impeller group 51 is arranged on one side (first side, left side of FIG. 1) which is one end side of the rotor body 3 in the axial direction Da.
- the second impeller group 52 is arranged on the other side (second side, right side in FIG. 1) that is the end side in the axial direction Da direction opposite to one side in the rotor body 3. Has been.
- the cover 4c of each impeller 4 is disposed on one side in the axial direction Da with respect to the disk 4a.
- the cover 4c of each impeller 4 is disposed on the other side in the axial direction Da with respect to the disk 4a.
- the pressure of the process gas gradually increases toward the center position in the axial direction Da. That is, the process gas flows while being compressed stepwise through the first impeller group 51 and the second impeller group 52 toward the center position in the axial direction Da.
- the plurality of impellers 4 includes a plurality of standard impellers 40 and a single large impeller 44.
- the standard impeller 40 is arranged in the largest number among the plurality of impellers 4.
- the large impeller 44 of the present embodiment is formed longer in the axial direction Da than the standard impeller 40. Accordingly, the large impeller 44 can circulate more process gas than the standard impeller 40.
- the large impeller 44 is heavier than the standard impeller 40.
- the large impeller 44 of this embodiment is the heaviest among the plurality of impellers 4 attached to the rotor body 3.
- the large impeller 44 is disposed on the most one side in the axial direction Da among the plurality of impellers 4. That is, the large impeller 44 constitutes a part of the first impeller group 51.
- the plurality of impellers 4 of the first impeller group 51 in FIG. 1 are referred to as a large impeller 44 and a first impeller 41 in order from one side in the axial direction Da.
- the plurality of impellers 4 of the second impeller group 52 in FIG. 1 are referred to as a second impeller 42 and a third impeller 43 in order from the other side in the axial direction Da.
- the first impeller 41 to the third impeller 43 are standard impellers 40.
- the bearing 6 supports the rotor body 3 so as to be rotatable around the axis O.
- One bearing 6 is provided at each end of the rotor body 3.
- Each of these bearings 6 is attached to a casing 7.
- the casing 7 supports the bearing 6 and covers the rotor 2 from the outer peripheral side.
- the casing 7 is formed in a cylindrical shape.
- the casing 7 is provided with a suction port 71 through which the process gas flows and a discharge port 72 through which the process gas flows out.
- rotor balance adjustment method S1 first, balance adjustment of the center of gravity is performed on the rotor body 3 before the impeller 4 is assembled to the rotor body 3 (rotor body balance adjustment step S2). Specifically, the position of the center of gravity of the rotor body 3 in the axial direction Da and the radial direction Dr when rotated is adjusted. In balance adjustment, for example, the position of the center of gravity is measured while the adjustment target is attached to a balancer and rotated. In the rotor body balance adjustment step S2, the center of gravity position is measured by rotating the rotor body 3 to be adjusted around the axis O, and the center of gravity position of the rotor body 3 is adjusted.
- balance adjustment is performed on each of the plurality of impellers 4 before being attached to the rotor body 3 (impeller adjustment step S3). Specifically, the weight adjustment is performed individually for each of the plurality of impellers 4. Thereby, balance adjustment of the gravity center position of the impeller 4 single body at the time of rotating is performed.
- the position of the center of gravity is measured by rotating the impeller 4 to be adjusted.
- the position of the center of gravity is shifted, at least one of the surface on the outer side of the disk 4a (the side on which the blade 4b is not disposed) and the surface on the outer side of the cover 4c (the side on which the blade 4b is not disposed).
- a process such as shaving is applied to the surface.
- impeller adjustment process S3 the gravity center position of impeller 4 itself is adjusted.
- the plurality of impellers 4 are fixed to the rotor body 3 (fixing step S4).
- a plurality of impellers 4 are attached to the rotor 2 so as to form a pair of two.
- a first pair that is a first impeller 41 and a third impeller 43, a large impeller 44 and a second impeller 42 as a pair of left and right in order from the center in the axial direction Da of the rotor body 3.
- the fixing step S4 of the present embodiment includes a first fixing step S41 and a second fixing step S42.
- the two standard impellers 40 are fixed near the center of the rotor body 3 in the axial direction Da.
- the pair of standard impellers 40 are fixed to the rotor body 3 with the disks 4a facing opposite to each other in the axial direction Da.
- the first impeller 41 and the third impeller 43 which are the first set, are attached to the rotor body 3 so that the respective covers 4c face the opposite side of the axial direction Da.
- 2nd fixing process S42 is implemented after 1st fixing process S41, as shown in FIG.
- the large impeller 44 is fixed to the rotor body 3.
- the large impeller 44 and the standard impeller 40 are attached to the rotor body 3 so as to sandwich the standard impeller 40 solidified in the rotor body 3 in the first fixing step S41.
- the second impeller 40 is the other standard impeller 40 on the opposite side of the axial direction Da so as to sandwich the first impeller 41 and the third impeller 43 with respect to the position where the large impeller 44 is fixed.
- the impeller 42 is fixed.
- the large impeller 44 and the second impeller 42 which are the second set, are arranged so that the cover 4c faces the opposite side of the axial direction Da. It is fixed to the main body 3.
- the balance of the center of gravity is adjusted with respect to the rotor body 3 to which the two standard impellers 40 are attached.
- Intermediate rotor adjustment process S5 As shown in FIG. 3, in the intermediate rotor adjustment step S5, balance adjustment is performed on the rotor 2 in a state where the two standard impellers 40 are fixed. In the intermediate rotor adjustment step S5, the weight of the two standard impellers 40 is adjusted to adjust the balance of the center of gravity of the rotor 2 when rotated.
- the rotor body 3 to which the first impeller 41 and the third impeller 43 are fixed is rotated about the axis O, and the position of the center of gravity is measured.
- processing such as cutting is performed on at least one of the outer surface of the disk 4a of the first impeller 41 and the outer surface of the disk 4a of the third impeller 43.
- the position of the center of gravity as the rotor 2 having the first impeller 41 and the third impeller 43 is adjusted.
- the cover 4c of the first impeller 41 is removed.
- the outer surface and the outer surface of the cover 4c of the third impeller 43 may be shaved. That is, the surface to be processed can be changed as appropriate.
- balance adjustment of the center of gravity position of the rotor 2 is performed on the rotor body 3 to which all the impellers 4 are attached (rotor adjustment step S7). That is, in the rotor adjustment step S7, balance adjustment is performed as the rotor 2 in a state where the three standard impellers 40 and one large impeller 44 are fixed. In the rotor adjustment step S7, the balance adjustment of the center of gravity of the rotor 2 is performed by adjusting the weight of the standard impeller 40 other than the large impeller 44 among the plurality of impellers 4. In the rotor adjustment step S7 of the present embodiment, the center of gravity position is measured by rotating the rotor body 3 about the axis O.
- the position of the center of gravity is deviated, for example, in the rotor adjustment step S7, the surface of the first impeller 41 other than the large impeller 44 that faces the one side in the axial direction Da of the first impeller 41, the first impeller 41, Processing such as cutting is performed on at least one of the surfaces of the different second impellers 42 facing the other side in the axial direction Da. That is, in the rotor adjustment step S7, for example, the surface of the cover 4c of the first impeller 41 and the surface of the disk 4a of the second impeller 42 are cut. Thereby, in rotor adjustment process S7, the gravity center position of the rotor 2 which has all the impellers 4 is adjusted.
- the weight may be adjusted with the standard impeller 40 other than the large impeller 44. Therefore, the surface of the cover 4c of the first impeller 41 and the surface of the disk 4a of the second impeller 42 are not limited to being cut as in this embodiment.
- the disk 4a and the cover 4c of the third impeller 43 may be shaved, or the disk 4a of the first impeller 41 and the cover 4c of the second impeller 42 may be shaved.
- the centrifugal compressor 1 is manufactured by arranging the rotor 2 on which the rotor balance adjusting method S1 is performed in the casing 7 in this manner.
- the balance adjustment of the rotor 2 is performed by cutting off the standard impeller 40 other than the large impeller 44. Has been done. That is, after adjusting the inclination of the large impeller 44 with respect to the rotor body 3 by cutting the large impeller 44, the first impeller 41 and the second impeller 42 are cut to adjust the weight without cutting the large impeller 44. The position of the center of gravity is adjusted. Thereby, the gravity center position of the rotor 2 can be adjusted without changing the weight of the large impeller 44.
- the center of gravity position of the rotor 2 can be adjusted without modifying the large impeller 44 that has been subjected to weight adjustment by performing processing once. Therefore, it is possible to prevent the large impeller 44 from being tilted with respect to the rotor body 3 due to the displacement of the center of gravity of the large impeller 44 itself after adjusting the center of gravity of the rotor 2. Thereby, even when the large impeller 44 is used, the balance of the rotor 2 can be adjusted with high accuracy.
- the intermediate rotor adjusting step S5 is performed before the second fixing step S42 is performed. Therefore, before the large impeller 44 is attached, the deviation of the center of gravity of the rotor 2 can be eliminated once. Therefore, the large impeller 44 can be attached to the rotor body 3 in a state where the center of gravity of the rotor 2 is not biased. Thereby, the influence on the rotor 2 by attaching the large impeller 44 with respect to the rotor main body 3 can be easily grasped. Therefore, the balance of the rotor 2 can be adjusted so that the influence of the large impeller 44 is efficiently removed.
- the balance adjustment can be performed for all the standard impellers 40 and the large impellers 44 before being attached to the rotor body 3 by the impeller adjustment step S3. Therefore, the plurality of impellers 4 can be assembled to the rotor body 3 in a state where the balance is adjusted. As a result, the eccentricity of the rotor 2 can be reliably eliminated, and the occurrence of vibration when the centrifugal compressor 1 is assembled and rotated can be prevented.
- one large impeller 44 and three standard impellers 40 are attached to the rotor body 3 as the plurality of impellers 4.
- the present invention is not limited to this.
- two or more large impellers 44 may be attached to the rotor body 3, and four or more standard impellers 40 may be attached to the rotor body 3.
- the plurality of impellers 4 is not limited to the even number as in the present embodiment, and may be an odd number.
- the centrifugal compressor is described as an example of the rotary machine, but the present invention is not limited to this.
- a supercharger or a pump to which the rotor adjustment method of the present embodiment is applied may be used.
- the balance of the rotor 2 can be adjusted with high accuracy.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
本実施形態におけるロータのバランス調整方法S1で調整されたロータ2を備えた回転機械は、複数のインペラ4を備えた多段式の遠心圧縮機1である。遠心圧縮機1は、作動流体を圧縮する。図1に示すように、遠心圧縮機1は、ロータ2と、軸受6と、ケーシング7とを備えている。
O…軸線
Da…軸方向
Dr…径方向
2…ロータ
3…ロータ本体
4…インペラ
4a…ディスク
4b…ブレード
4c…カバー
40…標準インペラ
41…第一インペラ
42…第二インペラ
43…第三インペラ
44…大型インペラ
51…第一インペラ群
52…第二インペラ群
6…軸受
7…ケーシング
71…吸込口
72…吐出口
S1…ロータのバランス調整方法
S2…ロータ本体バランス調整工程
S3…インペラ調整工程
S4…固定工程
S41…第一固定工程
S42…第二固定工程
S5…中間ロータ調整工程
S6…傾き調整工程
S7…ロータ調整工程
Claims (4)
- 軸方向に延びているロータ本体と該ロータ本体に固定された複数のインペラとを備えるロータのバランス調整方法であって、
前記ロータ本体に取り付ける前の前記複数のインペラのそれぞれに対して、個別に重量調整を行うことで前記インペラ単体の重心位置のバランス調整を行うインペラ調整工程と、
インペラ調整工程の後に、前記複数のインペラを前記ロータ本体に固定する固定工程と、
前記固定工程の後に、前記ロータ本体に固定された前記複数のインペラのうちの重量の大きい大型インペラについて前記ロータ本体に対する傾き調整を行う傾き調整工程と、
前記傾き調整工程の後に、前記複数のインペラのうちの前記大型インペラ以外の他のインペラを重量調整することで前記ロータの重心位置のバランス調整を行うロータ調整工程と、を含むロータのバランス調整方法。 - 前記ロータ調整工程は、前記大型インペラ以外の他のインペラである第一インペラの前記軸方向の一方側を向く面と、前記第一インペラと異なる第二インペラの前記軸方向の他方側を向く面とに加工を施すことで実施される請求項1に記載のロータのバランス調整方法。
- 前記固定工程は、二つの前記インペラを前記ロータ本体に固定する第一固定工程と、
前記第一固定工程後に、前記大型インペラを前記ロータ本体に固定する第二固定工程とを、有し、
前記第一固定工程後であって前記第二固定工程を実施する前に、二つの前記インペラに対して重量調整することで前記ロータの重心位置のバランス調整を行う中間ロータ調整工程と、を含む請求項1または請求項2に記載のロータのバランス調整方法。 - 前記第二固定工程は、前記大型インペラが固定されている位置に対して二つの前記インペラを挟み込むように前記軸方向の反対側に他のインペラを固定する請求項3に記載のロータのバランス調整方法。
Priority Applications (4)
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EP15909791.4A EP3346138B1 (en) | 2015-12-03 | 2015-12-03 | Rotor balance adjustment method |
JP2017553567A JP6488522B2 (ja) | 2015-12-03 | 2015-12-03 | ロータのバランス調整方法 |
US15/765,397 US10428836B2 (en) | 2015-12-03 | 2015-12-03 | Rotor balance adjustment method |
PCT/JP2015/083993 WO2017094161A1 (ja) | 2015-12-03 | 2015-12-03 | ロータのバランス調整方法 |
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PCT/JP2015/083993 WO2017094161A1 (ja) | 2015-12-03 | 2015-12-03 | ロータのバランス調整方法 |
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US11655757B2 (en) * | 2021-07-30 | 2023-05-23 | Rolls-Royce North American Technologies Inc. | Modular multistage compressor system for gas turbine engines |
CN116907729B (zh) * | 2023-07-13 | 2024-05-14 | 东莞市卓茂仪器有限公司 | 一种基于点胶加质的叶轮平衡修正方法 |
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- 2015-12-03 WO PCT/JP2015/083993 patent/WO2017094161A1/ja active Application Filing
- 2015-12-03 JP JP2017553567A patent/JP6488522B2/ja active Active
- 2015-12-03 US US15/765,397 patent/US10428836B2/en active Active
- 2015-12-03 EP EP15909791.4A patent/EP3346138B1/en active Active
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JPS5552593U (ja) * | 1978-10-04 | 1980-04-08 | ||
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JP2014088803A (ja) * | 2012-10-30 | 2014-05-15 | Mitsubishi Heavy Ind Ltd | インペラ及びこれを備えた回転機械 |
JP2014101837A (ja) | 2012-11-21 | 2014-06-05 | Mitsubishi Heavy Ind Ltd | 回転体のバランス調整方法 |
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JPWO2017094161A1 (ja) | 2018-07-26 |
US10428836B2 (en) | 2019-10-01 |
EP3346138B1 (en) | 2019-09-18 |
EP3346138A1 (en) | 2018-07-11 |
JP6488522B2 (ja) | 2019-03-27 |
US20180283402A1 (en) | 2018-10-04 |
EP3346138A4 (en) | 2018-11-21 |
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