WO2017183544A1 - インペラ組立体、過給機及びインペラ組立体の組立方法 - Google Patents
インペラ組立体、過給機及びインペラ組立体の組立方法 Download PDFInfo
- Publication number
- WO2017183544A1 WO2017183544A1 PCT/JP2017/015052 JP2017015052W WO2017183544A1 WO 2017183544 A1 WO2017183544 A1 WO 2017183544A1 JP 2017015052 W JP2017015052 W JP 2017015052W WO 2017183544 A1 WO2017183544 A1 WO 2017183544A1
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- WIPO (PCT)
- Prior art keywords
- rotor
- hub
- impeller
- nut
- flange
- Prior art date
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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
- F04D29/60—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/32—Engines with pumps other than of reciprocating-piston type
- F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
- F02B33/40—Engines with pumps other than of reciprocating-piston type with rotary pumps of non-positive-displacement type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
-
- 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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
Definitions
- a supercharger is widely used as an auxiliary device for obtaining high combustion energy in an internal combustion engine.
- an exhaust turbine supercharger is configured to compress air supplied to an internal combustion engine by rotating a turbine rotor with exhaust gas of the internal combustion engine and rotating a compressor impeller with the driving force thereof.
- the flange member is pressed against the end face of the hub by the tightening force (axial force) of the nut.
- the tightening force of the nut by appropriately setting the tightening force of the nut, the flange member can be fixed to the end surface of the hub not by bolting but by friction locking. That is, the flange member, the compressor impeller, and the nut do not rotate relative to each other due to the frictional force between the contact portion of the flange member and the end surface of the hub and the frictional force between the rotor side surface of the flange member and the end surface of the nut.
- the flange member in the impeller assembly according to any one of (1) to (4), includes a flange member recess on a surface on the rotor side.
- the rotor has a rotor recess on a surface on the flange member side, and the nut is screwed to the shaft so as to apply a pressing force to a bottom surface of the flange member recess, and the flange member recess and the rotor It is accommodated in the nut accommodating space formed by the recess.
- the rotor in the impeller assembly according to any one of (1) to (5), includes a rotor main body including a magnet portion, the rotor main body, and the rotor main body.
- the rotor side flange part is provided in the one end side of the said flexible coupling including the flexible coupling which connects a flange member.
- a supercharger according to at least one embodiment of the present invention includes the impeller assembly according to any one of (1) to (6) above.
- the flange member is pressed against the end surface of the hub by the tightening force (axial force) of the nut in the nut screwing step.
- the tightening force of the nut by appropriately setting the tightening force of the nut, the flange member can be fixed to the end surface of the hub not by bolting but by friction locking. That is, the flange member, the compressor impeller, and the nut do not rotate relative to each other due to the frictional force between the contact portion of the flange member and the end surface of the hub and the frictional force between the rotor side surface of the flange member and the end surface of the nut.
- the nut final tightening step the nut is tightened while pulling a portion on the tip side of the shaft that is temporarily tightened in the nut temporary tightening step in the axial direction. Since the final tightening is performed, the final tightening of the nut can be performed with the shaft extending thinly. For this reason, by releasing the shaft after final tightening (by stopping the pulling of the shaft), the nut can be firmly fixed to the shaft while the flange member is strongly pressed against the end surface of the hub. For this reason, the effect of preventing the flange member, the compressor impeller, and the nut from rotating relative to each other can be enhanced.
- the compressor impeller 10 includes a hub 14 having a through hole 15 through which the shaft 8 is inserted, and a plurality of moving blades 18 provided on the outer peripheral surface 16 of the hub 14 at intervals in the circumferential direction. The positioning of the compressor impeller 10 in the axial direction is performed by the rear surface 19 of the hub 14 abutting against the step portion 9 of the shaft 8.
- the compressor casing 12 includes an air guide cylinder 20 that covers the compressor impeller 10, a scroll casing 24 that forms a scroll flow path 22, a diffuser flow path that connects the flow path 26 inside the air guide cylinder 20 and the scroll flow path 22. And a diffuser member 30 that forms a member 28.
- the motor 6 includes a motor rotor 40 connected to the compressor impeller 10 via a flange member 38, a stator 42 (winding portion) provided around the motor rotor 40, a cylindrical motor casing 44 that covers the stator 42, And a support member 46 that supports the motor casing 44.
- the motor rotor 40 includes a cylindrical rotor core 48 and a magnet portion 50 fixed to the outer peripheral surface of the rotor core 48, and is configured in a cylindrical shape as a whole.
- the supercharger 100 has a rotor overhang structure in which the motor rotor 40 is cantilevered at the tip portion 64 of the shaft 8. A part of the motor 6 is accommodated in the connecting casing 36, and the remaining part of the motor 6 is accommodated in the air guide cylinder 20.
- the energy of the exhaust gas of an internal combustion engine (for example, marine diesel engine) is converted into the rotational energy of a turbine rotor (not shown), and the compressor impeller 10 connected to the turbine rotor via the shaft 8 is used.
- the outside air taken in from the silencer 4 is compressed and supplied to the internal combustion engine.
- the compressor impeller 10 is rotationally driven by using the driving force of the motor 6 as an auxiliary.
- FIG. 2 is an enlarged view of a connecting portion between the motor rotor 40 and the compressor impeller 10 shown in FIG.
- FIG. 3 is an enlarged view of a connecting portion between the motor rotor 40 and the compressor impeller 10 shown in FIG.
- the supercharger 100 includes a flange member 38 for connecting the compressor impeller 10 and the motor rotor 40, and a nut 54 for fixing the compressor impeller 10 and the flange member 38 to the shaft 8.
- the fastening member 56 for fastening the flange member 38 and the motor rotor 40 is included.
- the shaft 8, the compressor impeller 10, the flange member 38, the motor rotor 40, the nut 54, and the fastening member 56 are assembled to constitute the impeller assembly 200.
- the flange member 38 is a cylindrical member having a through hole 53 through which the shaft 8 is inserted.
- the flange member 38 is in contact with the upstream end surface 58 in the axial direction of the hub 14, and the impeller side is provided on the upstream side in the axial direction with respect to the contact portion 60 and projects outward in the radial direction.
- a flange portion 62 is provided.
- the nut 54 is screwed into a screw portion 66 formed at the tip portion 64 of the shaft 8 so as to sandwich the flange member 38 between the nut 54 and the end surface 58 of the hub 14.
- the flange member 38 is pressed against the end surface 58 of the hub 14 by the tightening force (axial force) of the nut 54.
- the tightening force of the nut 54 by appropriately setting the tightening force of the nut 54, the flange member 38 can be fixed to the end surface 58 of the hub 14 not by bolting but by friction locking. That is, the frictional force between the contact portion 60 of the flange member 38 and the end surface 58 of the hub 14, and the frictional force between the surface 70 of the flange member 38 on the motor rotor 40 side and the end surface 71 of the nut 54,
- the impeller 10 and the nut 54 can be integrally assembled so as not to rotate relative to each other. Therefore, compared with the impeller assembly described in Patent Document 1, the number of parts for mounting the flange member 38 to the end surface 58 of the hub 14 can be reduced, and the configuration of the impeller assembly is simplified. be able to.
- the distance between the motor rotor 40 and the hub 14 can be shortened by the amount that attachment parts are not required between the flange member 38 and the end face 58 of the hub 14. it can.
- the overhang amount of the motor rotor 40 can be reduced to suppress the vibration of the shaft 8, so that the dynamic response and stability of the shaft system can be improved.
- the overhang amount of the motor rotor 40 can be reduced, the degree of freedom in design can be increased, and the size and weight restrictions of the motor 6 itself can be increased. Therefore, it is possible to use a motor with a large output as the motor 6.
- the motor rotor 40 may include an annular spigot protrusion 75 that protrudes downstream (on the compressor impeller 10 side) in the axial direction from the rotor flange 68.
- the flange member 38 has a spigot recess 77 that fits into the spigot protrusion 75, and the spigot protrusion 75 is provided adjacent to the outer peripheral side of the nut 54, and the spigot structure 73 together with the spigot recess 77.
- the fastening member 56 includes a flange fastening bolt 78 for fastening the impeller side flange portion 62 and the rotor side flange portion 68, and a flange screwed to the flange fastening bolt 78.
- the outer peripheral surface 82 of the rotor side flange portion 68 includes an inclined surface 84 that is inclined so that the distance d to the axis C increases toward the downstream side in the axial direction, and the inclined surface 84 includes a flange fastening bolt 78.
- a countersink portion 88 that accommodates the head portion 86 is provided. Note that a reamer bolt may be used for the flange fastening bolt 78 from the viewpoint of mounting accuracy.
- the air flow (broken arrow in the figure) that has passed between the motor rotor 40 and the stator 42 in the axial direction is caused by the inclined surface 84 to move the moving blades of the compressor impeller 10. 18 can be guided smoothly. Further, by providing a countersink portion 88 that accommodates the head portion 86 of the flange fastening bolt 78 on the inclined surface 84, the windage loss caused by the head portion 86 of the flange fastening bolt 78 is reduced, and the rotor side flange portion 68 is reduced. An increase in the outer diameter of can be suppressed.
- the impeller assembly 200 can be reduced in size in the axial direction because the contact portion 60 of the flange member 38 is accommodated in the hub recess 90. Further, since the impeller side flange portion 62 and the rotor side flange portion 68 can be provided at positions close to the end face 58 of the hub 14, the center of gravity of the motor rotor 40 can be brought close to the compressor impeller 10. Thereby, the vibration of the shaft 8 can be suppressed and the dynamic response and stability of the shaft system can be improved.
- the flange member 38 has a flange member recess 96 on the surface 70 on the motor rotor 40 side, and the rotor core 48 of the motor rotor 40 has a rotor recess 102 on the surface 98 on the flange member side.
- the nut 54 is screwed into the shaft 8 so as to apply a pressing force to the bottom surface 110 of the flange member recess 96, and is accommodated in a nut housing space 112 formed by the flange member recess 96 and the rotor recess 102. Is done.
- the nut 54 When the nut 54 is screwed into the screw portion 66 in the assembly of the impeller assembly, the nut 54 is temporarily tightened until the nut 54 abuts against the flange member 38, and then the temporary tightening of the tip end portion 64 of the shaft 8 is performed.
- the nut 54 is finally tightened with a jig inserted into the jig insertion hole 108 provided on the side surface (outer peripheral surface) 107 of the nut 54 while pulling a portion on the tip side of the nut 54 in the axial direction with a hydraulic chuck or the like. May be performed. As a result, the nut 54 can be finally tightened in a state where the shaft 8 is thinly stretched.
- the impeller assembly 200 described above is compared with the impeller assembly 300 of the comparative form.
- FIG. 4 is a schematic sectional view showing the configuration of the impeller assembly 200 and the stator 42 described above.
- FIG. 5 is a schematic cross-sectional view showing configurations of the impeller assembly 300 and the stator 042 according to the comparative embodiment.
- the washer 013 inserted through the shaft 008 is fixed to the end face 058 of the hub 014 of the compressor impeller 010 with a washer fixing bolt 017. Further, the washer 013 is pressed against the end face 058 of the hub 014 by the tightening force (axial force) of the nut 021 screwed to the shaft 008, and the washer 013 is held between the nut 021 and the hub 014.
- a flange member 038 is attached to the washer 013 via a claw 023, and the flange member 038 is pressed against the washer 013 by a tightening force (axial force) of a nut 025 screwed to the shaft 008.
- the impeller assembly 300 in order to fix the washer 013 to the end face 058 of the hub 014 with the washer fixing bolt 017, it is necessary to provide a bolt hole 059 in the end face 058 of the hub 014.
- the frictional force between the contact portion 60 of the flange member 38 and the end surface 58 of the hub 14 and the flange are set by appropriately setting the tightening force of the nut 54.
- the flange member 38, the compressor impeller 10 and the nut 54 can be assembled integrally so as not to rotate relative to each other by the frictional force between the surface 70 of the member 38 on the motor rotor 40 side and the end surface 71 of the nut 54. Therefore, it is not necessary to provide a bolt hole for attaching a washer or the like to the end face 58 of the hub 14, and retrofitting of adding the motor rotor 40 to the hub 14 is easy.
- the motor rotor 40 may include a flexible coupling 104 as shown in FIG.
- the motor rotor 40 includes a rotor main body portion 106 including a magnet portion 50, and a flexible coupling 104 that connects the rotor main body portion 106 and the flange member 38, and the rotor-side flange portion 68 includes the flexible coupling 104.
- the motor rotor 40 includes a rotor main body portion 106 including a magnet portion 50, and a flexible coupling 104 that connects the rotor main body portion 106 and the flange member 38, and the rotor-side flange portion 68 includes the flexible coupling 104.
- the impeller side flange portion 62 of the flange member 38 Provided on one end side and fastened with the impeller side flange portion 62 of the flange member 38.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
上記(1)に記載のようにフランジ部材をボルト留めではなく摩擦留めによってハブの端面に固定することができるため、ハブの端面にボルト穴が不要である。したがって、発電機又は電動機のロータをコンプレッサインペラに追設するレトロフィットが容易である。
例えば、「ある方向に」、「ある方向に沿って」、「平行」、「直交」、「中心」、「同心」或いは「同軸」等の相対的或いは絶対的な配置を表す表現は、厳密にそのような配置を表すのみならず、公差、若しくは、同じ機能が得られる程度の角度や距離をもって相対的に変位している状態も表すものとする。
例えば、「同一」、「等しい」及び「均質」等の物事が等しい状態であることを表す表現は、厳密に等しい状態を表すのみならず、公差、若しくは、同じ機能が得られる程度の差が存在している状態も表すものとする。
例えば、四角形状や円筒形状等の形状を表す表現は、幾何学的に厳密な意味での四角形状や円筒形状等の形状を表すのみならず、同じ効果が得られる範囲で、凹凸部や面取り部等を含む形状も表すものとする。
一方、一の構成要素を「備える」、「具える」、「具備する」、「含む」、又は、「有する」という表現は、他の構成要素の存在を除外する排他的な表現ではない。
過給機100は、モータ6を内蔵した電動アシスト過給機であり、コンプレッサ2、サイレンサ4、及びモータ6を備える。
4 サイレンサ
6 モータ
8 シャフト
9 段差部
10 コンプレッサインペラ
12 コンプレッサケーシング
14 ハブ
15 貫通穴
16 外周面
18 動翼
19 背面
20 空気案内筒
22 スクロール流路
24 スクロールケーシング
26 流路
28 ディフューザ流路
30 ディフューザ部材
32 サイレンサケーシング
34 サイレンサエレメント
36 連結用ケーシング
38 フランジ部材
40 モータロータ
42 ステータ
44 モータケーシング
46 支持部材
48 ロータコア
50 磁石部
53 貫通孔
54 ナット
55 嵌合部
56 締結部材
58 端面
60 当接部
62 インペラ側フランジ部
64 先端部
66 螺子部
68 ロータ側フランジ部
70 面
71 端面
72 インロー構造
73 インロー構造
74 インロー凸部
75 インロー凸部
76 インロー凹部
77 インロー凹部
78 ボルト
79 基端部
80 ナット
82 外周面
84 傾斜面
86 頭部
88 部
90 ハブ凹部
91 内周面
92 底面
96 フランジ部材凹部
98 面
100 過給機
102 ロータ凹部
104 フレキシブルカップリング
106 ロータ本体部
107 側面
108 差し込み孔
200,300 インペラ組立体
A 距離
B 距離
C 軸線
D オーバーハング量
d 距離
Claims (9)
- シャフトと、
前記シャフトが挿通されたハブを含むコンプレッサインペラと、
前記シャフトが挿通されたフランジ部材であって、軸線方向の一端部に前記ハブの端面に当接する当接部と、軸線方向の他端部に径方向における外側に突出するインペラ側フランジ部と、含むフランジ部材と、
前記ハブの前記端面との間に前記フランジ部材を挟持するように前記シャフトの先端部に螺合されたナットと、
発電機又は電動機のロータであって、前記インペラ側フランジ部における前記ハブと反対側に隣接するロータ側フランジ部を含むロータと、
前記インペラ側フランジ部と前記ロータ側フランジ部とを締結する締結部材と、
を備えるインペラ組立体。 - 前記ロータと前記フランジ部材とは、インローで組み付けられている、請求項1に記載のインペラ組立体。
- 前記締結部材は、前記インペラ側フランジ部と前記ロータ側フランジ部とを締結するためのフランジ締結ボルトを含み、
前記ロータ側フランジ部の外周面は、前記軸線方向において前記ハブ側に向かうにつれて前記軸線との距離が大きくなるように傾斜した傾斜面を含み、
前記傾斜面には、前記フランジ締結ボルトを収容する座繰り部が設けられている、請求項1又は2に記載のインペラ組立体。 - 前記ハブの前記端面には、ハブ凹部が形成されており、
前記当接部は、前記端面のうち前記ハブ凹部の底面に当接し、
前記ナットは、前記ハブ凹部の前記底面との間に前記フランジ部材を挟持するように前記シャフトの先端部に螺合された、請求項1乃至3の何れか1項に記載のインペラ組立体。 - 前記フランジ部材は、前記ロータ側の面にフランジ部材凹部を有し、
前記ロータは、前記フランジ部材側の面にロータ凹部を有し、
前記ナットは、前記フランジ部材凹部の底面に押圧力を付与するように前記シャフトに螺合するとともに、前記フランジ部材凹部と前記ロータ凹部によって形成されたナット収容空間内に収容された、請求項1乃至4の何れか1項に記載のインペラ組立体。 - 前記ロータは、磁石部を含むロータ本体部と、前記ロータ本体部と前記フランジ部材とを連結するフレキシブルカップリングを含み、
前記ロータ側フランジ部は、前記フレキシブルカップリングの一端側に設けられた、請求項1乃至5の何れか1項に記載のインペラ組立体。 - 請求項1乃至6の何れか1項に記載のインペラ組立体を備える過給機。
- シャフトと、
ハブと、前記ハブの外周面に周方向に間隔を空けて設けられた複数の動翼と、を含むコンプレッサと、
前記ハブのうち軸線方向における上流側の端面に当接する当接部と、前記当接部よりも前記軸線方向における上流側に設けられ、径方向における外側に突出するインペラ側フランジ部と、含むフランジ部材と、
前記シャフトの先端部に螺合されるナットと、
発電機又は電動機のロータと、
を備えるインペラ組立体の製造方法であって、
前記コンプレッサインペラに前記シャフトを挿通するインペラ挿通工程と、
前記フランジ部材に前記シャフトを挿通し、前記ハブの前記端面に前記当接部を当接させるフランジ部材挿通工程と、
前記ナットと前記ハブの前記端面との間に前記フランジ部材を挟持するように前記前記シャフトの先端部に前記ナットを螺合するナット螺合工程と、
前記インペラ側フランジ部と前記ロータ側フランジ部とを締結部材によって締結する締結工程と、を備える、インペラ組立体の組立方法。 - 前記ナット螺合工程は、
前記ナットの仮締めを行うナット仮締め工程と、
前記シャフトの先端部のうち前記仮締め工程で仮締めされた前記ナットよりも先端側の部分を前記軸線方向に引っ張りながら、前記ナットの本締めを行うナット本締め工程と、
を含む、請求項8に記載のインペラ組立体の組立方法。
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KR1020187020898A KR101914425B1 (ko) | 2016-04-21 | 2017-04-13 | 임펠러 조립체, 과급기 및 임펠러 조립체의 조립 방법 |
CN201780019511.XA CN108884755B (zh) | 2016-04-21 | 2017-04-13 | 叶轮组装体、增压器以及叶轮组装体的组装方法 |
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US10644630B2 (en) | 2017-11-28 | 2020-05-05 | General Electric Company | Turbomachine with an electric machine assembly and method for operation |
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