JPWO2007072536A1 - Permanent magnet generator rotor for gas turbine, manufacturing method thereof, gas turbine and manufacturing method thereof - Google Patents

Permanent magnet generator rotor for gas turbine, manufacturing method thereof, gas turbine and manufacturing method thereof Download PDF

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JPWO2007072536A1
JPWO2007072536A1 JP2007550941A JP2007550941A JPWO2007072536A1 JP WO2007072536 A1 JPWO2007072536 A1 JP WO2007072536A1 JP 2007550941 A JP2007550941 A JP 2007550941A JP 2007550941 A JP2007550941 A JP 2007550941A JP WO2007072536 A1 JPWO2007072536 A1 JP WO2007072536A1
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rotor
permanent magnet
cylindrical body
shaft
rotor shaft
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JP4681008B2 (en
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英明 長島
英明 長島
早坂　靖
靖 早坂
学 八木
学 八木
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Hitachi Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • 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
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/026—Shaft to shaft connections
    • 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
    • F05D2220/70—Application in combination with
    • F05D2220/76—Application in combination with an electrical generator
    • F05D2220/768—Application in combination with an electrical generator equipped with permanent magnets
    • 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
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

同一軸上に構成されるタービンと圧縮機のロータ構造と前記ロータ構造のロータ軸と同一軸上に構成される永久磁石発電機から構成されるタービン，圧縮機及び永久磁石発電機のロータ構造において，前記永久磁石発電機は軸方向に分割されたリング状永久磁石の内周側に磁性円筒体を通し，前記リング状永久磁石と同径に加工されたロータ軸と前記リング状永久磁石との外周に非磁性円筒体を焼き嵌めし，前記非磁性円筒体によって前記リング状永久磁石と前記ロータ軸とを磁気的に結合し、かつそれらを一体化した永久磁石発電機のロータ構造。焼き嵌めされた前記非磁性円筒体の両端面の内周をロータ軸の外周に溶接することによってこれらを結合し、ロータ内に腐食性ガスや液体が進入するのを防止する。In a rotor structure of a turbine, a compressor, and a permanent magnet generator, each composed of a rotor structure of a turbine and a compressor configured on the same axis, and a permanent magnet generator configured on the same axis as the rotor axis of the rotor structure The permanent magnet generator is formed by passing a magnetic cylindrical body on the inner peripheral side of a ring-shaped permanent magnet divided in the axial direction, and a rotor shaft processed to the same diameter as the ring-shaped permanent magnet and the ring-shaped permanent magnet. A rotor structure of a permanent magnet generator in which a nonmagnetic cylindrical body is shrink-fitted on the outer periphery, the ring-shaped permanent magnet and the rotor shaft are magnetically coupled by the nonmagnetic cylindrical body, and they are integrated. By welding the inner peripheries of both end faces of the non-magnetic cylindrical body, which are shrink-fitted, to the outer periphery of the rotor shaft, these are joined to prevent corrosive gas or liquid from entering the rotor.

Description

本発明は，ガスタービン用永久磁石発電機ロータ、その製造方法及びタービン，圧縮機及び永久磁石発電機ロータが同一軸上に配置して構成されるガスタービン並びにその製造方法に関する。特に本発明はマイクロガスタービンに適する発電機ロータ及びガスタービン構成とそれらの製造法に関する。   The present invention relates to a permanent magnet generator rotor for a gas turbine, a manufacturing method thereof, a gas turbine configured by arranging a turbine, a compressor, and a permanent magnet generator rotor on the same axis, and a manufacturing method thereof. In particular, the present invention relates to generator rotor and gas turbine configurations suitable for micro gas turbines and methods for their manufacture.

かかるガスタービンでは，特許文献２に開示されているように、発電機，圧縮機，タービンが同一回転軸ロータ上に，前述の順に，配置される構造が知られている。このようなガスタービンに用いられる発電機としては，回転ロータに永久磁石を固定した永久磁石型発電機ロータが多い。永久磁石型発電機ロータとしては，円柱状の永久磁石，軸受部を非磁性の円筒状保持体（金属製パイプ）により，焼き嵌めし，一体化する発電機ロータが，特許文献１に示されている。また、特許文献２には発電機ロータ、圧縮機及びタービンを同軸上に連結し、タイボルト及びナットで一体化したマイクロガスタービンが開示されている。   In such a gas turbine, as disclosed in Patent Document 2, a structure in which a generator, a compressor, and a turbine are arranged on the same rotating shaft rotor in the order described above is known. As a generator used in such a gas turbine, there are many permanent magnet type generator rotors in which a permanent magnet is fixed to a rotating rotor. As a permanent magnet generator rotor, Patent Document 1 discloses a generator rotor in which a cylindrical permanent magnet and a bearing portion are shrink-fitted and integrated by a non-magnetic cylindrical holder (metal pipe). ing. Patent Document 2 discloses a micro gas turbine in which a generator rotor, a compressor, and a turbine are coaxially connected and integrated with a tie bolt and a nut.

米国特許第４，６６７，１２３号公報U.S. Pat. No. 4,667,123 特開２００１−０１２２５６号公報JP 2001-012256 A 特開２００４−２３２５３２号公報JP 2004-232532 A

特許文献１に記載の発電機ロータにおいては、永久磁石集合体をパイプ状の非磁性の金属保持体に挿入して、これらを固定する際に、焼き嵌め法により固定する方法がある。この方法においては、永久磁石集合体をパイプ状保持体に挿入する前に、永久磁石集合体を冷却し、パイプ状保持体を加熱する。挿入後、保持体を冷却することにより、保持体が収縮し、反対に永久磁石集合体が膨張して、両者を固定する。ところが，永久磁石集合体の外径と、保持体の内径との差は極めて僅かで、しかも永久磁石体及び保持体の長手方向における膨張率の違いがあるために、加熱した保持体と冷却した永久磁石集合体をすばやく正確に嵌合することが容易ではない。例えば永久磁石集合体の挿入過程で保持体の内壁に接触しただけで、焼き嵌めが失敗となることがある。このことは、永久磁石集合体を挿入する場合の目印や停止位置が定まっていないというために起こる障害である。また、永久磁石集合体と保持体の熱膨張係数が異なるために、保持体の冷却及び永久磁石集合体の温度上昇に際して、それらの軸方向の位置が明確に決まらないと、最終的に永久磁石集合体の両端と保持体の両端部の位置が一致しなくなり、様々な後加工が必要となる可能性がある。   In the generator rotor described in Patent Document 1, there is a method in which a permanent magnet assembly is inserted into a pipe-like non-magnetic metal holder and fixed by a shrink-fit method when they are fixed. In this method, before the permanent magnet assembly is inserted into the pipe-shaped holding body, the permanent magnet assembly is cooled and the pipe-shaped holding body is heated. After the insertion, the holding body is cooled, so that the holding body contracts, and on the contrary, the permanent magnet assembly expands and fixes both. However, the difference between the outer diameter of the permanent magnet assembly and the inner diameter of the holding body is very small, and because there is a difference in the expansion coefficient in the longitudinal direction between the permanent magnet body and the holding body, the heated holding body is cooled. It is not easy to quickly and accurately fit the permanent magnet assembly. For example, the shrink fit may fail just by contacting the inner wall of the holding body in the process of inserting the permanent magnet assembly. This is a failure that occurs because the mark or stop position when the permanent magnet assembly is inserted is not fixed. In addition, since the thermal expansion coefficients of the permanent magnet assembly and the holding body are different, the permanent magnets will eventually end up unless their axial positions are clearly determined when the holding body is cooled and the temperature of the permanent magnet assembly is increased. The positions of both ends of the assembly and both ends of the holding body may not match, and various post-processing may be required.

以上述べたように、従来の焼き嵌め方式の永久磁石発電機ロータの製造組み立てにおいては、種々の問題点がある。従って本発明の課題は、焼き嵌め方式の永久磁石発電機ロータの製造を簡単にし、寸法精度の高い永久磁石発電機ロータを提供することである。   As described above, there are various problems in the production and assembly of the conventional shrink-fit type permanent magnet generator rotor. Accordingly, an object of the present invention is to provide a permanent magnet generator rotor with high dimensional accuracy that simplifies the manufacture of a shrink-fit type permanent magnet generator rotor.

本発明は焼き嵌め式永久磁石発電機ロータのシャフトに非磁性円筒体（保持体）の端部を規定する手段を設け、この手段によって永久磁石発電機ロータをパイプ状非磁性保持体に挿入する際に、保持体の端部位置を正確に規制することにより、焼き嵌め作業を簡単かつ確実に行うものである。   The present invention provides means for defining the end of a nonmagnetic cylindrical body (holding body) on the shaft of a shrink-fit permanent magnet generator rotor, and the permanent magnet generator rotor is inserted into the pipe-shaped nonmagnetic holding body by this means. At this time, the shrink-fitting operation is easily and reliably performed by accurately regulating the end position of the holding body.

本発明によれば，非磁性円筒体を焼き嵌めするに当たり、ロータシャフトに形成した規制部によって、非磁性円筒体の位置決めを容易、確実に行えるので、焼き嵌め作業が容易になり、かつ精度の高い焼き嵌めが行える。また、非磁性円筒体の両端をロータシャフトに溶接固定するので、円筒体内に腐食性ガスや液体などが侵入しなくなり、信頼性の高い永久磁石発電機ロータが得られる。   According to the present invention, when the non-magnetic cylindrical body is shrink-fitted, the non-magnetic cylindrical body can be easily and reliably positioned by the restriction portion formed on the rotor shaft, so that the shrink-fitting operation is facilitated and the accuracy is improved. High shrink fit. Further, since both ends of the non-magnetic cylindrical body are fixed by welding to the rotor shaft, corrosive gas or liquid does not enter the cylindrical body, and a highly reliable permanent magnet generator rotor can be obtained.

本発明の実施例１による永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator by Example 1 of this invention. 本発明の実施例２を示す永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator which shows Example 2 of this invention. 本発明の実施例３を示す永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator which shows Example 3 of this invention. 本発明の実施例４を示す永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator which shows Example 4 of this invention. 本発明の実施例５を示す永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator which shows Example 5 of this invention. 本発明の実施例６を示す永久磁石発電機のロータ構造の一部断面図。The partial cross section figure of the rotor structure of the permanent magnet generator which shows Example 6 of this invention. 本発明の実施例７によるマイクロガスタービン構造の一部断面図。The partial cross section figure of the micro gas turbine structure by Example 7 of this invention.

符号の説明Explanation of symbols

１…永久磁石発電機のロータ構造、２…タービン翼、３…圧縮機翼、４…連結用軸、５…連結用ナット、６…磁性体パイプ、７…圧縮機側ロータ軸、７ａ…二分割タイプの圧縮機側ロータ軸の圧縮機側、７ｂ…二分割タイプの圧縮機側ロータ軸の軸端側、
８…軸端側ロータ軸、９…リング状永久磁石、９ａ，９ｂ，９ｃ，９ｄ，９ｅ…リング状永久磁石、１０…非磁性円筒体（金属性パイプ）、１１…溶接開先（溶接用溝）、１２…軸端側溶接部溶け込み深さ、１３…圧縮機側溶接部溶け込み深さ、１３ａ…圧縮機側溶接部溶け込み深さ、
１３ｂ…圧縮機側溶接部の有効な接合範囲、１４ａ…圧縮機側ロータ軸端面の傾斜部、
１４ｂ…非磁性金属パイプの圧縮機側端面の傾斜部、１５…溶接部、２１…発電機固
定子。DESCRIPTION OF SYMBOLS 1 ... Rotor structure of a permanent magnet generator, 2 ... Turbine blade, 3 ... Compressor blade, 4 ... Connection shaft, 5 ... Connection nut, 6 ... Magnetic pipe, 7 ... Compressor side rotor shaft, 7a ... Two Compressor side of split type compressor side rotor shaft, 7b ... Shaft end side of two split type compressor side rotor shaft,
DESCRIPTION OF SYMBOLS 8 ... Shaft end side rotor shaft, 9 ... Ring-shaped permanent magnet, 9a, 9b, 9c, 9d, 9e ... Ring-shaped permanent magnet, 10 ... Nonmagnetic cylindrical body (metallic pipe), 11 ... Welding groove (for welding) Groove), 12 ... penetration depth of the weld on the shaft end side, 13 ... penetration depth of the weld on the compressor side, 13a ... penetration depth of the weld on the compressor side,
13b: Effective joint range of the compressor-side welded portion, 14a: Inclined portion of the compressor-side rotor shaft end surface,
14b: Inclined portion of the end surface on the compressor side of the nonmagnetic metal pipe, 15 ... welded portion, 21 ... generator stator.

本発明の実施形態を例示すれば以下のとおりである。   An embodiment of the present invention is exemplified as follows.

１）ロータシャフトと、シャフトの軸長方向の剛性を増加する大径部と、大径部に一端を支持された非磁性円筒体と、非磁性円筒体の内径と密着し、ロータシャフトの外周との間に固定されロータシャフトとの軸方向に配置された複数個の永久磁石セグメントと、非磁性円筒体の他端をロータシャフトに固定する手段とを有する永久磁石発電機のロータ。   1) A rotor shaft, a large-diameter portion that increases the rigidity of the shaft in the axial length direction, a non-magnetic cylindrical body that is supported at one end by the large-diameter portion, and an inner diameter of the non-magnetic cylindrical body. A permanent magnet generator rotor having a plurality of permanent magnet segments fixed to each other and arranged in the axial direction of the rotor shaft, and means for fixing the other end of the nonmagnetic cylindrical body to the rotor shaft.

２）前記ロータシャフトは、シャフトの長さ方向に中空部を有し、前記大径部に隣接する軸受部に接続した圧縮機側ロータ軸と、前記永久磁石セグメント及び該セグメントに隣接する軸端側ロータシャフトとを有し、前記中空部に挿入された連結用軸と連結用ナットによって締結されている前記永久磁石発電機のロータ。上記連結用軸はロータシャフト、圧縮機シャフト及びタービンシャフトの全体を貫通しても良いし、特許文献２に開示されたように、発電機ロータシャフトと圧縮機シャフトを貫通する中空部に挿入し、これを中実のタービンシャフトとを接続するようにしても良い。   2) The rotor shaft has a hollow portion in a length direction of the shaft, and is connected to a bearing portion adjacent to the large diameter portion, a compressor side rotor shaft, the permanent magnet segment, and a shaft end adjacent to the segment. A rotor of the permanent magnet generator having a side rotor shaft and being fastened by a connecting shaft inserted into the hollow portion and a connecting nut. The connecting shaft may pass through the entire rotor shaft, compressor shaft, and turbine shaft, or as disclosed in Patent Document 2, is inserted into a hollow portion that passes through the generator rotor shaft and the compressor shaft. This may be connected to a solid turbine shaft.

３）前記大径部に前記非磁性円筒体の一端が溶接固定された前記永久磁石発電機のロータ。   3) The rotor of the permanent magnet generator in which one end of the non-magnetic cylindrical body is welded and fixed to the large diameter portion.

４）前記非磁性円筒体の他端が前記軸端側ロータシャフトに溶接固定されている前記永久磁石発電機のロータ。   4) The rotor of the permanent magnet generator, wherein the other end of the nonmagnetic cylindrical body is welded and fixed to the shaft end side rotor shaft.

５）前記大径部と前記非磁性円筒体の突合せ部に形成された溶接開先を溶接した前記永久磁石発電機のロータ。   5) The rotor of the permanent magnet generator in which a welding groove formed at the butt portion of the large diameter portion and the nonmagnetic cylindrical body is welded.

６）前記非磁性円筒体の他端と前記軸端側ロータシャフトとが円周溶接されている前記永久磁石発電機のロータ。   6) The rotor of the permanent magnet generator in which the other end of the nonmagnetic cylindrical body and the shaft end side rotor shaft are circumferentially welded.

７）前記大径部と前記非磁性円筒体固定部のロータとが分割されている前記永久磁石発電機のロータ。   7) The rotor of the permanent magnet generator in which the large diameter portion and the rotor of the nonmagnetic cylindrical body fixing portion are divided.

８）前記分割されたロータシャフトと非磁性円筒体との接合面を溶接固定した前記永久磁石発電機のロータ。   8) The rotor of the permanent magnet generator in which the joint surface between the divided rotor shaft and the nonmagnetic cylindrical body is fixed by welding.

９）前記大径部と前記非磁性円筒体の間に形成された溝部内面のロータシャフトと非磁性円筒体の接合面近傍を溶接した前記永久磁石発電機のロータ。   9) The rotor of the permanent magnet generator in which the rotor shaft on the inner surface of the groove formed between the large diameter portion and the nonmagnetic cylindrical body and the vicinity of the joint surface of the nonmagnetic cylindrical body are welded.

１０）前記大径部に連続するロータシャフトの端部の径を縮小し、その縮小部の端部に前記非磁性円筒体の一端を固定し、該非磁性円筒体と前記ロータシャフトの縮小部とを重ね溶接した前記永久磁石発電機のロータ。   10) The diameter of the end portion of the rotor shaft that continues to the large diameter portion is reduced, and one end of the nonmagnetic cylindrical body is fixed to the end portion of the reduced portion, and the nonmagnetic cylindrical body and the reduced portion of the rotor shaft are The rotor of the permanent magnet generator, wherein the two are welded together.

１１）前記永久磁石セグメントの内側に配置され、前記ロータシャフトを磁気的に結合する磁性円筒体を有する前記永久磁石発電機のロータ。   11) The rotor of the permanent magnet generator having a magnetic cylindrical body that is disposed inside the permanent magnet segment and magnetically couples the rotor shaft.

１２）ロータシャフトを有する永久磁石発電機ロータと、該ロータの外周に配置された固定子と、ロータシャフトとの延長線上に配置された圧縮機とタービンとを有するガスタービンであって、ロータシャフトと、シャフトの軸長方向の剛性を増加する大径部と、大径部に一端を支持された非磁性円筒体と、非磁性円筒体の内径と密着し、ロータシャフトの外周との間に固定されロータシャフトとの軸方向に配置された複数個の永久磁石セグメントと、非磁性円筒体の他端をロータシャフトに固定する手段とを有するガスタービン。   12) A gas turbine having a permanent magnet generator rotor having a rotor shaft, a stator disposed on the outer periphery of the rotor, a compressor and a turbine disposed on an extension line of the rotor shaft, and the rotor shaft A large-diameter portion that increases the rigidity in the axial direction of the shaft, a non-magnetic cylindrical body that is supported at one end by the large-diameter portion, and an inner diameter of the non-magnetic cylindrical body, A gas turbine comprising a plurality of permanent magnet segments fixed and arranged in an axial direction with a rotor shaft, and means for fixing the other end of the nonmagnetic cylindrical body to the rotor shaft.

１３）前記ロータシャフトは、前記大径部に隣接する軸受部に接続した圧縮機側ロータ軸と、前記永久磁石セグメント及び該セグメントに隣接する軸端側ロータシャフトとを有し、前記圧縮機、タービン及びロータシャフトは前記中空部に挿入された連結用軸と連結用ナットによって締結されている前記ガスタービン。   13) The rotor shaft includes a compressor side rotor shaft connected to a bearing portion adjacent to the large diameter portion, the permanent magnet segment, and a shaft end side rotor shaft adjacent to the segment, and the compressor, The gas turbine, wherein the turbine and the rotor shaft are fastened by a connecting shaft inserted into the hollow portion and a connecting nut.

１４）前記大径部に前記非磁性円筒体の一端が溶接固定された前記ガスタービン。   14) The gas turbine in which one end of the non-magnetic cylindrical body is fixed to the large diameter portion by welding.

１５）前記非磁性円筒体の多端が前記軸端側ロータシャフトに溶接固定されている前記ガスタービン。   15) The gas turbine in which multiple ends of the non-magnetic cylindrical body are welded and fixed to the shaft end side rotor shaft.

１６）前記大径部と前記非磁性円筒体の突合せ部に形成された溶接開先を溶接した前記ガスタービン。   16) The gas turbine in which a welding groove formed at a butt portion of the large diameter portion and the nonmagnetic cylindrical body is welded.

１７）前記非磁性円筒体の他端と前記軸端側ロータシャフトとが円周溶接されている前記ガスタービン。   17) The gas turbine in which the other end of the nonmagnetic cylindrical body and the shaft end side rotor shaft are circumferentially welded.

１８）前記大径部と前記非磁性円筒体固定部のロータとが分割されている前記ガスタービン。   18) The gas turbine in which the large diameter portion and the rotor of the nonmagnetic cylindrical body fixing portion are divided.

１９）前記分割されたロータシャフトと非磁性円筒体との接合面を溶接固定した前記ガスタービン。   19) The gas turbine in which a joint surface between the divided rotor shaft and the nonmagnetic cylindrical body is fixed by welding.

２０）前記大径部と前記非磁性円筒体の間に形成された溝部内面のロータシャフトと非磁性円筒体の接合面近傍を溶接した前記ガスタービン。   20) The gas turbine in which a rotor shaft on an inner surface of a groove formed between the large diameter portion and the nonmagnetic cylindrical body is welded in the vicinity of a joint surface between the nonmagnetic cylindrical body.

２１）前記大径部に連続するロータシャフトの端部の径を縮小し、その縮小部の端部に前記非磁性円筒体の一端を固定し、該非磁性円筒体と前記ロータシャフトの縮小部とを重ね溶接した前記ガスタービン。   21) The diameter of the end portion of the rotor shaft continuous to the large diameter portion is reduced, one end of the nonmagnetic cylindrical body is fixed to the end portion of the reduced portion, the nonmagnetic cylindrical body and the reduced portion of the rotor shaft, The gas turbine obtained by lap welding.

２２）前記永久磁石セグメントの内側に配置され、前記ロータシャフトを磁気的に結合する磁性円筒体を有する前記ガスタービン。   22) The gas turbine having a magnetic cylindrical body that is disposed inside the permanent magnet segment and magnetically couples the rotor shaft.

２３）中空部と大径部を有するロータシャフトと、該大径部に挿入された磁性円筒体と、上記磁性円筒体の外面に配置された複数個の永久磁石セグメントと、永久磁石セグメントの端部に接触して配置された軸端側ロータとを順次積層し、前記大径部又はその近傍に形成された非磁性円筒体の規制部（支持部）につき合わせて非磁性円筒体を焼き嵌めして、前記永久磁石セグメントに非磁性円筒体を固定し、前記大径部又はその近傍に形成された支持部に溶接開先を形成し、非磁性円筒体を前記ロータシャフトに固定する永久磁石発電機ロータの製造方法。   23) A rotor shaft having a hollow portion and a large-diameter portion, a magnetic cylinder inserted into the large-diameter portion, a plurality of permanent magnet segments disposed on the outer surface of the magnetic cylinder, and an end of the permanent magnet segment The shaft end side rotor arranged in contact with the portion is sequentially laminated, and the nonmagnetic cylindrical body is shrink-fitted together with the restricting portion (supporting portion) of the nonmagnetic cylindrical body formed in the large diameter portion or in the vicinity thereof. Then, a nonmagnetic cylindrical body is fixed to the permanent magnet segment, a welding groove is formed in the support portion formed in the large diameter portion or the vicinity thereof, and the nonmagnetic cylindrical body is fixed to the rotor shaft. A method for producing a generator rotor.

本発明は，磁性円筒体の外周に軸方向に積層配置された複数のリング状永久磁石９と前記リング状永久磁石９と同径に加工されたロータ軸７と８の外周に非磁性円筒体（金属パイプ）１０を焼き嵌めし，前記非磁性金属パイプ１０によって前記リング状永久磁石９と前記ロータ軸７と８とを結合する永久磁石発電機のロータ構造において，非磁性金属パイプ１０とロータ軸７と８との結合をあらゆる使用条件で一体構造とすることができる永久磁石発電機のロータ構造とそれを用いたガスタービンを提供するものである。   The present invention relates to a plurality of ring-shaped permanent magnets 9 arranged in the axial direction on the outer periphery of a magnetic cylindrical body and a non-magnetic cylindrical body on the outer periphery of rotor shafts 7 and 8 processed to the same diameter as the ring-shaped permanent magnet 9. In the rotor structure of a permanent magnet generator in which the (metal pipe) 10 is shrink-fitted and the ring-shaped permanent magnet 9 and the rotor shafts 7 and 8 are coupled by the non-magnetic metal pipe 10, the non-magnetic metal pipe 10 and the rotor There is provided a rotor structure of a permanent magnet generator in which the coupling between shafts 7 and 8 can be integrated in all use conditions, and a gas turbine using the rotor structure.

永久磁石セグメントの集合体９はリング状に成形する。一般にこの種の永久磁石は希土類元素を主成分とする焼結体からなるので、磁性円筒体６にできるだけ密着して配置するためには、リング状とするのが好ましい。   The assembly 9 of permanent magnet segments is formed in a ring shape. In general, this type of permanent magnet is made of a sintered body containing a rare earth element as a main component. Therefore, in order to place the permanent magnet as close as possible to the magnetic cylindrical body 6, a ring shape is preferable.

以下，本発明の実施形態を図面に従って説明する。
（実施例１）
図１は本発明の一実施例である永久磁石発電機のロータ構造１の上側半分を断面にした半断面図である。ロータシャフトは、圧縮機に連結される軸端部７と、それに隣接するベアリング部１９と、大径部３０と、複数のリング状永久磁石９と、その永久磁石の中心部に配置された磁性円筒体６と、軸端側ロータ軸８とからなる。永久磁石集合体９に対応して固定子２１が配置され、更に固定子の外周にケーシングが配置される。なお、図１においては固定子２１を片側しか示していないが、ロータシャフトに対して同心的に配置されることは言うまでもない。以下、図２〜図７においては固定子及びケーシングを省略して示した。なお、発電機ロータの固定子及びケーシング等の具体的構成の一例が特開２００４−３３６９１７号公報に開示されている。本発明ではこのような構成例を採用することができる。また、圧縮機及びタービンについてもケーシングが必須であり、その構成例として、例えば特許文献２に記載された物がある。ケーシングについては周知の事項であるので、詳細な説明は省略する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Example 1
FIG. 1 is a half sectional view of the upper half of a rotor structure 1 of a permanent magnet generator according to an embodiment of the present invention. The rotor shaft includes a shaft end portion 7 connected to the compressor, a bearing portion 19 adjacent thereto, a large diameter portion 30, a plurality of ring-shaped permanent magnets 9, and a magnet disposed at the center of the permanent magnet. It consists of a cylindrical body 6 and a shaft end side rotor shaft 8. A stator 21 is disposed corresponding to the permanent magnet assembly 9, and a casing is disposed on the outer periphery of the stator. In FIG. 1, only one side of the stator 21 is shown, but it goes without saying that the stator 21 is arranged concentrically with respect to the rotor shaft. Hereinafter, in FIG. 2 to FIG. 7, the stator and the casing are omitted. An example of a specific configuration of the generator rotor stator and casing is disclosed in Japanese Patent Application Laid-Open No. 2004-336917. In the present invention, such a configuration example can be adopted. Moreover, a casing is essential also about a compressor and a turbine, and there exists a thing described in patent document 2, for example as the structural example. Since the casing is a well-known matter, a detailed description is omitted.

複数の永久磁石セグメント同士或いはセグメントと磁性円筒体６とを、特許文献１に記載されたように、接着剤を用いて固定することもできる。本実施例では焼き嵌めによって、永久磁石セグメントと磁性円筒体６との均一な接触を達成する。なお、特許文献１においても、非磁性円筒体（保持パイプ）を焼き嵌めにより永久磁石集合体に固定する方法及び非磁性円筒体の両端部を溶接により、ロータシャフトの端部に溶接することを開示しているが、前述のように、焼き嵌めという作業が極めて高度な熟練技術を必要とし、しかも非磁性円筒体の位置決めができないような状態で行うため、確実に正確な焼き嵌めができ難いと言う問題がある。   A plurality of permanent magnet segments or segments and the magnetic cylindrical body 6 can be fixed using an adhesive as described in Patent Document 1. In this embodiment, uniform contact between the permanent magnet segment and the magnetic cylindrical body 6 is achieved by shrink fitting. In Patent Document 1, a method of fixing a nonmagnetic cylindrical body (holding pipe) to a permanent magnet assembly by shrink fitting and welding both ends of the nonmagnetic cylindrical body to the end of the rotor shaft are also described. Although disclosed, as described above, the shrink-fitting operation requires extremely high skill and is performed in a state where the non-magnetic cylindrical body cannot be positioned, so it is difficult to ensure accurate shrink-fitting. There is a problem to say.

図の大径部３０の右側には、非磁性円筒体１０の左側端部の位置決めをする規制手段１７が形成される。これによって、非磁性円筒体１０を永久磁石集合体９上に焼き嵌めする際に、正確かつ確実に非磁性円筒体を挿入することができる。磁性円筒体６は、大径部３０、永久磁石集合体９及び軸端８を磁気的に接続するための手段である。なお、ロータシャフトの大径部に磁性円筒体６を挿入するための環状穴２５及び軸端８部にも環状穴２６を形成して、磁性円筒体が安定に固定されるようにする。   On the right side of the large-diameter portion 30 in the figure, a restricting means 17 for positioning the left end portion of the nonmagnetic cylindrical body 10 is formed. Thereby, when the nonmagnetic cylindrical body 10 is shrink-fitted onto the permanent magnet assembly 9, the nonmagnetic cylindrical body can be inserted accurately and reliably. The magnetic cylinder 6 is a means for magnetically connecting the large diameter portion 30, the permanent magnet assembly 9 and the shaft end 8. An annular hole 25 for inserting the magnetic cylindrical body 6 into the large-diameter portion of the rotor shaft and an annular hole 26 are also formed in the shaft end 8 portion so that the magnetic cylindrical body is stably fixed.

大径部３０と非磁性円筒体１０の接触部には、焼き嵌め終了後、溶け込み深さ１３を形成して、溶接部１５により密封、固定する。この場合、圧縮機側溶接部の溶接部１５の溶け込み深さ１３の下に未溶着部を生じることになるので、初期き裂として強度設計をする必要がある。また、非磁性円筒体の他の端部も、溶け込み深さ１２を形成して溶接部１５により密封する。この溶接により、非磁性円筒体内即ち発電機ロータ内に腐食性ガスや水分が浸入するのを確実に防止することができ、信頼性の高い発電機ロータとなる。以下の説明において、同符号は同一部分を示す。また、それぞれの実施例における特徴的な主要部のみを説明することとする。
（実施例２）
図２は、本発明に他の実施例による発電機ロータの構造を示す一部断面図である。軸端側ロータ軸８の端面の外周面側と軸端側の非磁性金属パイプ１１の端面の内周面側が溶接される。この場合の溶接による溶接部１５の軸端側溶接部溶け込み深さが１２で示されている。圧縮機側ロータ軸７と焼き嵌めされた非磁性金属パイプ１１の圧縮機側の端面が接する部分の圧縮機側ロータ軸７には圧縮機側ロータ軸端面に傾斜部１４ａをつけた溶接用溝（開先）１１を設けて外周側を広く開放し，非磁性金属パイプ１１の端面の内周面側とロータ軸の端面の外周面側とを溶接することができる。この場合の溶接による溶接部１５は非磁性円筒体（金属パイプ）１０の端面の内周面側では浅く，ロータ軸の端面の外周面側では深くなり，有効な接合深さは１３ｂとなる。At the contact portion between the large-diameter portion 30 and the nonmagnetic cylindrical body 10, a penetration depth 13 is formed after the shrink fitting, and the welded portion 15 is sealed and fixed. In this case, since an unwelded portion is generated below the penetration depth 13 of the welded portion 15 of the compressor-side welded portion, it is necessary to design the strength as an initial crack. Further, the other end of the non-magnetic cylindrical body is also sealed with the weld 15 by forming a penetration depth 12. By this welding, it is possible to reliably prevent the entry of corrosive gas and moisture into the non-magnetic cylinder, that is, the generator rotor, and a highly reliable generator rotor can be obtained. In the following description, the same reference numerals indicate the same parts. Further, only the characteristic main parts in the respective embodiments will be described.
(Example 2)
FIG. 2 is a partial cross-sectional view showing the structure of a generator rotor according to another embodiment of the present invention. The outer peripheral surface side of the end surface of the shaft end side rotor shaft 8 and the inner peripheral surface side of the end surface of the nonmagnetic metal pipe 11 on the shaft end side are welded. The penetration depth of the welded portion 15 on the shaft end side of the welded portion 15 in this case is indicated by 12. The compressor-side rotor shaft 7 at the portion where the compressor-side rotor shaft 7 and the compressor-side end surface of the shrink-fitted nonmagnetic metal pipe 11 are in contact with each other has a welding groove with an inclined portion 14a on the compressor-side rotor shaft end surface. A (groove) 11 is provided to widely open the outer peripheral side, and the inner peripheral surface side of the end surface of the nonmagnetic metal pipe 11 and the outer peripheral surface side of the end surface of the rotor shaft can be welded. In this case, the welded portion 15 by welding is shallow on the inner peripheral surface side of the end surface of the non-magnetic cylindrical body (metal pipe) 10, deeper on the outer peripheral surface side of the end surface of the rotor shaft, and the effective joint depth is 13b.

本実施例によれば，圧縮機側ロータ軸７と軸端側ロータ軸８の両者と非磁性金属パイプ１０との結合をあらゆる使用条件で一体構造とすることができ，永久磁石型発電機ロータ構造の信頼性を高めることができる。
（実施例３）
図３は本発明の実施例である永久磁石発電機のロータ構造１の上側半分を断面にした半断面図である。圧縮機側ロータ軸７と焼き嵌めされた非磁性円筒体（金属パイプ）１０の圧縮機側の端面が接する部分の圧縮機側ロータ軸７には圧縮機側ロータ軸端面に傾斜部１４ａをつけ，さらに非磁性金属パイプの圧縮機側の端面を含む端面にも傾斜部１４ｂをつけた溶接用溝（開先）１１を設けて外周側をさらに広く開放し，前記非磁性金属パイプの端面の内周面側とロータ軸の端面の外周面側表面に溶け込み深さが直角となるように溶接することを可能としている。深さ１３ｂは実施例１よりも深くなる。
（実施例４）
図４は本発明の実施例である永久磁石発電機のロータ構造１に対応する上側半分を断面にした半断面図である。永久磁石発電機のロータ構造１において，ロータ軸と焼き嵌めされた非磁性金属パイプの圧縮機側の端面を含む面で圧縮機側ロータ軸７を圧縮機側７ａと軸端側７ｂの二分割にする。二分割部分を突き合わせ、仮固定しておいた状態で非磁性円筒体を永久磁石集合体に焼き嵌めした後、前記突合せ部を離して非磁性円筒体とロータシャフトとを溶接固定する。前記非磁性金属パイプ１１の端面の内周面側と圧縮機側ロータ軸の軸端側７ｂ端面の外周面側とを溶接し，溶接後にこれら圧縮機側７ａと軸端側７ｂを連結軸と連結用ナットによって連結して圧縮機側ロータ軸７を構成する。また、軸端側ロータシャフト８と非磁性円筒体の他端も溶接固定する。
（実施例５）
図４は本発明の実施例である永久磁石発電機のロータ構造１に対応する上側半分を断面にした半断面図である。永久磁石発電機のロータ構造において，大径部に一端を固定するように非磁性金属パイプ１１を焼き嵌めした後、突合せ部に溶接開先を形成する。圧縮機側端の溶接を、前記非磁性円筒体（金属パイプ）１０と圧縮機側ロータ軸７の外周面に行う。
（実施例６）
図６は本発明の実施例である永久磁石発電機のロータ構造１に対応する上側半分を断面にした半断面図である。永久磁石発電機のロータ構造において，圧縮機側ロータ軸７に焼き嵌めされた非磁性金属パイプ１１の圧縮機側の端面が接する部分の径を縮小し、非磁性円筒体（金属パイプ）縮小部の内周面側とロータ軸外周面側とを重ね溶接する。
（実施例７）
図７は本発明の実施例によるマイクロガスタービンの構造を示す一部断面であり、永久磁石発電機ロータ１と、圧縮機３とタービン２が同軸上に配置される。それらはロータシャフトに形成された中空部に挿入された連結用軸（ボルト）４及び連結用ナット５により一体化される。また、永久磁石発電機ロータ１の永久磁石に対応して固定子２１が配置され、発電機を構成する。ロータの非磁性円筒体の一端はロータの大径部との突合せ部で固定され、かつ溶接部１５によって固定される。また、非磁性円筒体の他端も溶接部１５によりロータに固定される。According to the present embodiment, the coupling between the compressor side rotor shaft 7 and the shaft end side rotor shaft 8 and the nonmagnetic metal pipe 10 can be made into an integral structure under all use conditions, and the permanent magnet generator rotor The reliability of the structure can be increased.
(Example 3)
FIG. 3 is a half sectional view of the upper half of the rotor structure 1 of the permanent magnet generator according to the embodiment of the present invention. The compressor-side rotor shaft 7 is provided with an inclined portion 14a on the end surface of the compressor-side rotor shaft at the portion where the compressor-side end surface of the non-magnetic cylindrical body (metal pipe) 10 that is shrink-fitted with the compressor-side rotor shaft 7 contacts. Further, a welding groove (groove) 11 having an inclined portion 14b is also provided on the end surface including the end surface on the compressor side of the nonmagnetic metal pipe so that the outer peripheral side is further opened widely, and the end surface of the nonmagnetic metal pipe is It is possible to weld the inner peripheral surface side and the outer peripheral surface side surface of the end surface of the rotor shaft so as to have a right penetration depth. The depth 13b is deeper than in the first embodiment.
(Example 4)
FIG. 4 is a half sectional view of the upper half corresponding to the rotor structure 1 of the permanent magnet generator according to the embodiment of the present invention. In the rotor structure 1 of a permanent magnet generator, the compressor-side rotor shaft 7 is divided into two parts, that is, a compressor side 7a and a shaft end side 7b, on the surface including the end surface on the compressor side of the nonmagnetic metal pipe shrink-fitted with the rotor shaft. To. After the two divided portions are butted and temporarily fixed, the nonmagnetic cylindrical body is shrink-fitted to the permanent magnet assembly, and then the butted portion is released to fix the nonmagnetic cylindrical body and the rotor shaft by welding. The inner peripheral surface side of the end surface of the nonmagnetic metal pipe 11 and the outer peripheral surface side of the end surface 7b of the compressor side rotor shaft are welded, and after welding, the compressor side 7a and the shaft end side 7b are connected to the connecting shaft. The compressor-side rotor shaft 7 is configured by being connected by a connecting nut. Further, the shaft end side rotor shaft 8 and the other end of the nonmagnetic cylindrical body are also fixed by welding.
(Example 5)
FIG. 4 is a half sectional view of the upper half corresponding to the rotor structure 1 of the permanent magnet generator according to the embodiment of the present invention. In the rotor structure of the permanent magnet generator, the nonmagnetic metal pipe 11 is shrink-fitted so as to fix one end to the large diameter portion, and then a welding groove is formed at the butt portion. The compressor side end is welded to the outer peripheral surfaces of the nonmagnetic cylindrical body (metal pipe) 10 and the compressor side rotor shaft 7.
(Example 6)
FIG. 6 is a half sectional view of the upper half corresponding to the rotor structure 1 of the permanent magnet generator according to the embodiment of the present invention. In the rotor structure of a permanent magnet generator, the diameter of the non-magnetic cylindrical body (metal pipe) reducing portion is reduced by reducing the diameter of the portion of the non-magnetic metal pipe 11 that is shrink-fitted to the compressor-side rotor shaft 7 and contacting the compressor-side end surface. The inner peripheral surface side and the rotor shaft outer peripheral surface side are overlap-welded.
(Example 7)
FIG. 7 is a partial cross-sectional view showing the structure of a micro gas turbine according to an embodiment of the present invention, in which the permanent magnet generator rotor 1, the compressor 3 and the turbine 2 are arranged on the same axis. They are integrated by a connecting shaft (bolt) 4 and a connecting nut 5 inserted in a hollow portion formed in the rotor shaft. Moreover, the stator 21 is arrange | positioned corresponding to the permanent magnet of the permanent magnet generator rotor 1, and comprises a generator. One end of the nonmagnetic cylindrical body of the rotor is fixed at the abutting portion with the large diameter portion of the rotor and is fixed by the welded portion 15. Further, the other end of the nonmagnetic cylindrical body is also fixed to the rotor by the welded portion 15.

なお、図７に示すマイクロガスタービンは以下のようにして製造される。なお、工程順序は必要に応じて変更できる。
イ．中空部と大径部を有するロータシャフトと、該大径部に挿入された磁性円筒体と、上記磁性円筒体の外面に配置された複数個の永久磁石セグメントと、永久磁石セグメントの端部に接触して配置された軸端側ロータとを順次積層する。
ロ．前記大径部又はその近傍に形成された非磁性円筒体の支持部につき合わせて非磁性円筒体を焼き嵌めする。なお、永久磁石集合体は予め冷却しておくのが好ましい。
ハ．前記永久磁石セグメントに非磁性円筒体を固定する。
ニ．前記大径部又はその近傍に形成された支持部に溶接開先を形成する。
ホ．非磁性円筒体を前記ロータシャフトに固定する。
へ．上記のようにして製造された永久磁石発電機ロータと、圧縮機とタービンとを一軸上に配置し、連結用軸を貫通させ、連結用ナットにより一体化する。
ト．ケーシングに固定された固定子を、永久磁石発電機ロータの永久磁石集合体９に対応して配置する。The micro gas turbine shown in FIG. 7 is manufactured as follows. The process order can be changed as necessary.
I. A rotor shaft having a hollow portion and a large diameter portion, a magnetic cylinder inserted in the large diameter portion, a plurality of permanent magnet segments disposed on the outer surface of the magnetic cylinder, and an end of the permanent magnet segment The shaft end side rotors arranged in contact with each other are sequentially stacked.
B. The nonmagnetic cylindrical body is shrink-fitted together with the support portion of the nonmagnetic cylindrical body formed in the large diameter portion or in the vicinity thereof. The permanent magnet assembly is preferably cooled in advance.
C. A nonmagnetic cylindrical body is fixed to the permanent magnet segment.
D. A welding groove is formed on a support portion formed at or near the large diameter portion.
E. A nonmagnetic cylindrical body is fixed to the rotor shaft.
What. The permanent magnet generator rotor manufactured as described above, the compressor, and the turbine are arranged on one shaft, the connecting shaft is penetrated, and the connecting nut is integrated.
G. The stator fixed to the casing is arranged corresponding to the permanent magnet assembly 9 of the permanent magnet generator rotor.

以上のようにして構成されるガスタービンは、非磁性円筒体を永久磁石セグメントに挿入、焼き嵌めする作業の簡単化と信頼性が向上し、かつ非磁性円筒体の端部の溶接固定によって信頼性の高い永久磁石発電機及びガスタービンが提供できる。   The gas turbine configured as described above improves the reliability and simplification of the work of inserting and shrink-fitting a non-magnetic cylinder into a permanent magnet segment, and is reliable by welding and fixing the end of the non-magnetic cylinder. A highly permanent magnet generator and gas turbine can be provided.

本発明は、特にマイクロガスタービンなどの小型のガスタービン用の永久磁石発電機のロータ及びその発電機を備えたガスタービンに適用できる。   The present invention is particularly applicable to a rotor of a permanent magnet generator for a small gas turbine such as a micro gas turbine and a gas turbine including the generator.

Claims (24)

ロータシャフトと、シャフトの軸長方向の剛性を増加する大径部と、大径部に一端を支持された非磁性円筒体と、非磁性円筒体の内径と密着し、ロータシャフトの外周との間に固定されロータシャフトとの軸方向に配置された複数個の永久磁石セグメントと、非磁性円筒体の他端をロータシャフトに固定する手段とを有することを特徴とする永久磁石発電機のロータ。   A rotor shaft, a large-diameter portion that increases the rigidity of the shaft in the axial direction, a non-magnetic cylindrical body supported at one end by the large-diameter portion, an inner diameter of the non-magnetic cylindrical body, and an outer periphery of the rotor shaft A rotor of a permanent magnet generator, comprising: a plurality of permanent magnet segments fixed in between and arranged in an axial direction with the rotor shaft; and means for fixing the other end of the nonmagnetic cylindrical body to the rotor shaft. . 前記ロータシャフトは、シャフトの長さ方向に中空部を有し、前記大径部に隣接する軸受部に接続した圧縮機側ロータ軸と、前記永久磁石セグメント及び該セグメントに隣接する軸端側ロータシャフトとを有し、前記中空部に挿入された連結用軸と連結用ナットによって締結されていることを特徴とする請求項１記載の永久磁石発電機のロータ。   The rotor shaft has a hollow portion in a length direction of the shaft, and is connected to a bearing portion adjacent to the large diameter portion, a compressor side rotor shaft, the permanent magnet segment, and a shaft end side rotor adjacent to the segment. The rotor of a permanent magnet generator according to claim 1, further comprising a shaft and fastened by a connecting shaft inserted into the hollow portion and a connecting nut. 前記大径部に前記非磁性円筒体の一端が溶接固定されたことを特徴とする請求項１記載の永久磁石発電機のロータ。   The rotor of a permanent magnet generator according to claim 1, wherein one end of the nonmagnetic cylindrical body is fixed to the large diameter portion by welding. 前記非磁性円筒体の他端が前記軸端側ロータシャフトに溶接固定されていることを特徴とする請求項２記載の永久磁石発電機のロータ。   The rotor of a permanent magnet generator according to claim 2, wherein the other end of the nonmagnetic cylindrical body is fixed by welding to the shaft end side rotor shaft. 前記大径部と前記非磁性円筒体の突合せ部に形成された溶接開先を溶接したことを特徴とする請求項４記載の永久磁石発電機のロータ。   The rotor of the permanent magnet generator according to claim 4, wherein a welding groove formed at a butt portion of the large diameter portion and the nonmagnetic cylindrical body is welded. 前記非磁性円筒体の他端と前記軸端側ロータシャフトとが円周溶接されていることを特徴とする請求項２記載の永久磁石発電機のロータ。   The rotor of a permanent magnet generator according to claim 2, wherein the other end of the nonmagnetic cylindrical body and the shaft end side rotor shaft are circumferentially welded. 前記大径部と前記非磁性円筒体固定部のロータとが分割され、前記連結用軸とナットにより連結されていることを特徴とする請求項２記載の永久磁石発電機のロータ。   The rotor of a permanent magnet generator according to claim 2, wherein the large-diameter portion and the rotor of the nonmagnetic cylindrical body fixing portion are divided and connected by the connecting shaft and a nut. 前記分割されたロータシャフトと非磁性円筒体との接合面を溶接固定したことを特徴とする請求項７記載の永久磁石発電機のロータ。   8. The rotor of a permanent magnet generator according to claim 7, wherein a joint surface between the divided rotor shaft and the nonmagnetic cylindrical body is fixed by welding. 前記大径部と前記非磁性円筒体の間に形成された溝部内面のロータシャフトと非磁性円筒体の接合面近傍を溶接したことを特徴とする請求項１記載の永久磁石発電機のロータ。   2. The rotor of a permanent magnet generator according to claim 1, wherein the rotor shaft on the inner surface of the groove formed between the large diameter portion and the nonmagnetic cylindrical body is welded in the vicinity of the joint surface of the nonmagnetic cylindrical body. 前記大径部に連続するロータシャフトの端部の径を縮小し、その縮小部の端部に前記非磁性円筒体の一端を固定し、該非磁性円筒体と前記ロータシャフトの縮小部とを重ね溶接したことを特徴とする請求項１記載の永久磁石発電機のロータ。   The diameter of the end of the rotor shaft that continues to the large-diameter portion is reduced, one end of the non-magnetic cylinder is fixed to the end of the reduced portion, and the non-magnetic cylinder and the reduced portion of the rotor shaft are overlapped. The rotor of the permanent magnet generator according to claim 1, wherein the rotor is welded. 前記永久磁石セグメントの内側に配置され、前記ロータシャフトを磁気的に結合する磁性円筒体を有する請求項１記載の永久磁石発電機のロータ。   The rotor of a permanent magnet generator according to claim 1, further comprising a magnetic cylindrical body that is disposed inside the permanent magnet segment and magnetically couples the rotor shaft. ロータシャフトを有する永久磁石発電機ロータと、該ロータの外周に配置された固定子と、ロータシャフトとの延長線上に配置された圧縮機とタービンとを有するガスタービンであって、ロータシャフトと、シャフトの軸長方向の剛性を増加する大径部と、大径部に一端を支持された非磁性円筒体と、非磁性円筒体の内径と密着し、ロータシャフトの外周との間に固定されロータシャフトとの軸方向に配置された複数個の永久磁石セグメントと、非磁性円筒体の他端をロータシャフトに固定する手段とを有することを特徴とするガスタービン。   A gas turbine having a permanent magnet generator rotor having a rotor shaft, a stator disposed on the outer periphery of the rotor, a compressor and a turbine disposed on an extension of the rotor shaft, the rotor shaft; A large-diameter part that increases the rigidity of the shaft in the axial direction, a non-magnetic cylindrical body supported at one end by the large-diameter part, and an inner diameter of the non-magnetic cylindrical body are in close contact with each other and fixed between the outer periphery of the rotor shaft. A gas turbine comprising: a plurality of permanent magnet segments arranged in an axial direction with respect to a rotor shaft; and means for fixing the other end of the nonmagnetic cylindrical body to the rotor shaft. 前記ロータシャフトは、シャフトの長さ方向に中空部を有し、前記大径部に隣接する軸受部に接続した圧縮機側ロータ軸と、前記永久磁石セグメント及び該セグメントに隣接する軸端側ロータシャフトとを有し、前記圧縮機、タービン及びロータシャフトは前記中空部に挿入された連結用軸と連結用ナットによって締結されていることを特徴とする請求項１２記載のガスタービン。   The rotor shaft has a hollow portion in a length direction of the shaft, and is connected to a bearing portion adjacent to the large diameter portion, a compressor side rotor shaft, the permanent magnet segment, and a shaft end side rotor adjacent to the segment. The gas turbine according to claim 12, further comprising: a shaft, wherein the compressor, the turbine, and the rotor shaft are fastened by a connecting shaft inserted into the hollow portion and a connecting nut. 前記大径部に前記非磁性円筒体の一端が溶接固定されたことを特徴とする請求項１２記載のガスタービン。   The gas turbine according to claim 12, wherein one end of the nonmagnetic cylindrical body is fixed to the large diameter portion by welding. 前記非磁性円筒体の他端が前記軸端側ロータシャフトに溶接固定されていることを特徴とする請求項１３記載のガスタービン。   The gas turbine according to claim 13, wherein the other end of the nonmagnetic cylindrical body is fixed to the shaft end side rotor shaft by welding. 前記大径部と前記非磁性円筒体の突合せ部に形成された溶接開先を溶接したことを特徴とする請求項１４記載のガスタービン。   The gas turbine according to claim 14, wherein a welding groove formed at a butt portion of the large diameter portion and the nonmagnetic cylindrical body is welded. 前記非磁性円筒体の他端と前記軸端側ロータシャフトとが円周溶接されていることを特徴とする請求項１６記載のガスタービン。   The gas turbine according to claim 16, wherein the other end of the nonmagnetic cylindrical body and the shaft end side rotor shaft are circumferentially welded. 前記大径部と前記非磁性円筒体の固定部のロータとが分割されていることを特徴とする請求項１２記載のガスタービン。   The gas turbine according to claim 12, wherein the large-diameter portion and a rotor of the fixed portion of the nonmagnetic cylindrical body are divided. 前記分割されたロータシャフトと非磁性円筒体との接合面を溶接固定したことを特徴とする請求項１８記載のガスタービン。   The gas turbine according to claim 18, wherein a joint surface between the divided rotor shaft and the nonmagnetic cylindrical body is fixed by welding. 前記大径部と前記非磁性円筒体の間に形成された溝部内面のロータシャフトと非磁性円筒体の接合面近傍を溶接したことを特徴とする請求項１２記載のガスタービン。   The gas turbine according to claim 12, wherein the rotor shaft on the inner surface of the groove formed between the large diameter portion and the nonmagnetic cylindrical body is welded in the vicinity of the joint surface of the nonmagnetic cylindrical body. 前記大径部に連続するロータシャフトの端部の径を縮小し、その縮小部の端部に前記非磁性円筒体の一端を固定し、該非磁性円筒体と前記ロータシャフトの縮小部とを重ね溶接した請求項１２記載のガスタービン。   The diameter of the end of the rotor shaft that continues to the large-diameter portion is reduced, one end of the non-magnetic cylinder is fixed to the end of the reduced portion, and the non-magnetic cylinder and the reduced portion of the rotor shaft are overlapped. The gas turbine according to claim 12 welded. 前記永久磁石セグメントの内側に配置され、前記ロータシャフトを磁気的に結合する磁性円筒体を有する請求項１２記載のガスタービン。   The gas turbine according to claim 12, further comprising a magnetic cylindrical body that is disposed inside the permanent magnet segment and magnetically couples the rotor shaft. 中空部と大径部を有するロータシャフトと、該大径部に挿入された磁性円筒体と、上記磁性円筒体の外面に配置された複数個の永久磁石セグメントと、永久磁石セグメントの端部に接触して配置された軸端側ロータとを順次積層し、前記大径部又はその近傍に形成された非磁性円筒体の支持部につき合わせて非磁性円筒体を焼き嵌めして、前記永久磁石セグメントに非磁性円筒体を固定し、前記大径部又はその近傍に形成された支持部に溶接開先を形成し、非磁性円筒体を前記ロータシャフトに固定することを特徴とする永久磁石発電機ロータの製造方法。   A rotor shaft having a hollow portion and a large diameter portion, a magnetic cylinder inserted in the large diameter portion, a plurality of permanent magnet segments disposed on the outer surface of the magnetic cylinder, and an end of the permanent magnet segment The shaft end side rotors arranged in contact with each other are sequentially laminated, and the nonmagnetic cylindrical body is shrink-fitted together with the support portion of the nonmagnetic cylindrical body formed in the large diameter portion or the vicinity thereof, and the permanent magnet A permanent magnet power generation characterized in that a nonmagnetic cylindrical body is fixed to a segment, a welding groove is formed in a support portion formed at or near the large diameter portion, and the nonmagnetic cylindrical body is fixed to the rotor shaft. A method of manufacturing a machine rotor. 中空部と大径部を有するロータシャフトと、該大径部に挿入された磁性円筒体と、上記磁性円筒体の外面に配置された複数個の永久磁石セグメントと、永久磁石セグメントの端部に接触して配置された軸端側ロータとを順次積層し、
前記大径部又はその近傍に形成された非磁性円筒体の支持部につき合わせて非磁性円筒体を焼き嵌めし、
前記永久磁石セグメントに非磁性円筒体を固定し、
前記大径部又はその近傍に形成された支持部に溶接開先を形成し、
非磁性円筒体を前記ロータシャフトに固定し、
上記のようにして製造された永久磁石発電機ロータと、圧縮機とタービンとを一軸上に配置し、連結用軸を貫通させ、連結用ナットにより一体化し、
ケーシングに固定された固定子を、永久磁石発電機ロータの永久磁石集合体に対応して配置する、
ことを特徴とするガスタービンの製造方法。 A rotor shaft having a hollow portion and a large diameter portion, a magnetic cylinder inserted in the large diameter portion, a plurality of permanent magnet segments disposed on the outer surface of the magnetic cylinder, and an end of the permanent magnet segment The shaft end side rotors arranged in contact with each other are sequentially laminated,
The non-magnetic cylindrical body is shrink-fitted together with the supporting portion of the non-magnetic cylindrical body formed in the large diameter portion or the vicinity thereof,
Fixing a non-magnetic cylindrical body to the permanent magnet segment;
Forming a welding groove in the support portion formed in or near the large diameter portion,
Fixing a non-magnetic cylindrical body to the rotor shaft;
The permanent magnet generator rotor manufactured as described above, the compressor and the turbine are arranged on one shaft, the connecting shaft is penetrated, and the connecting nut is integrated,
The stator fixed to the casing is arranged corresponding to the permanent magnet assembly of the permanent magnet generator rotor.
A method for manufacturing a gas turbine.
JP2007550941A 2005-12-19 2005-12-19 Permanent magnet generator rotor for gas turbine, manufacturing method thereof, gas turbine and manufacturing method thereof Expired - Fee Related JP4681008B2 (en)

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JPH06284611A (en) * 1993-03-25 1994-10-07 Shinko Electric Co Ltd Permanent magnet type rotor in electric rotating machine
JPH1189143A (en) * 1997-09-11 1999-03-30 Hitachi Ltd Permanent magnet type rotor
JPH11234975A (en) * 1998-02-18 1999-08-27 Mitsubishi Motors Corp Assembly for rotor of generator
JP2005027440A (en) * 2003-07-03 2005-01-27 Honda Motor Co Ltd Rotor of rotating electric machine and its manufacturing method

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