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21. 发明专利

JPS585513A THRUST COLLAR OF ROTOR MADE OF CHROME STEEL 失效
公开(公告)号：JPS585513A
公开(公告)日：1983-01-12
申请号：JP10117381
申请日：1981-07-01
申请人： HITACHI LTD
发明人： TSUCHIYA KEIICHI , KUNO KATSUKUNI , MIZOI TAKAO , TAN TOSHIMI
IPC分类号： F01D5/02 , F01D5/06 , F01D25/16 , F16C3/02 , F16C17/04
摘要： PURPOSE:To improve bearing characteristic of a thrust collar by producing a divided guard plate of low alloy steel for a thrust collar and fixing it to a pressure face side of said collar for a turbine rotor made of 8-14% chrome steel by means of fixing measures and further joining the divided faces of said plate. CONSTITUTION:A turbine rotor 1 made of chrome steel has two thrust collars 4. A thrust collar guard plate 9 is fixed to a pressure receiving face side of said collar 4 by means of a bolt 10. The guard plate 9 is made of low alloy steel containing chrome, molybdenum, vanadium and the like of excellent bearing characteristic as chief ingredients, and processed after being divided into two parts so as to fit them to the pressure receiving faces of the thrust collar. Further, the guard plate 9 fixed to the thrust collar 4 by means of the bolt 10 is united into one body type guard plate 9 with the other plate through welding each other on their joining faces 12 which are divided faces of the guard plate.

22. 发明专利

JPS57165603A ROTOR SHAFT FOR STEAM TURBINE 失效
公开(公告)号：JPS57165603A
公开(公告)日：1982-10-12
申请号：JP5083281
申请日：1981-04-03
申请人： HITACHI LTD
发明人： YOSHIOKA TAKATOSHI , KIRIHARA SEISHIN , SHIGA MASAO , YOSHIDA TAKEHIKO , KUNO KATSUKUNI , TAN TOSHIMI , KOBAYASHI MASAHIRO
IPC分类号： F01D5/06 , F16C3/02
摘要： PURPOSE:To improve the bearing property of a rotary shaft and its resistance to high-temperature oxidation and to wear, by composing the outside surface of the build-up weld layer of the journal of the rotor shaft so that the main constituent of the outside surface is Fe and it contains a prescribed amount of Cr. CONSTITUTION:A build-up weld layer 5 is provided on the journal of a steam turbine rotor shaft 1 made of martensitic steel of high Cr content. The outside surface of the build-up weld layer 5 is composed so that the main constituent of the outside surface is Fe and it contains 0.5-3% by weight of Cr. The Cr content of the layer 5 is gradually reduced outwards to prevent weld cracks.

23. 发明专利

JPS54144504A TURBINE MOVING BLADE 失效
公开(公告)号：JPS54144504A
公开(公告)日：1979-11-10
申请号：JP5209178
申请日：1978-04-29
申请人： HITACHI LTD
发明人： TAN TOSHIMI , KUNO KATSUKUNI , MIZOI TAKAO
IPC分类号： F01D5/28
摘要： PURPOSE:To relieve stress due to centrifugal force and protect an anti-erosion plate fitted to a moving blade from stress corrosion craking by setting the length of the plate to be not larger than 1/4 of the effective length of the blade. CONSTITUTION:A low-pressure final-stage moving blade comprises an ani-erosion plate 4b welded to the back face on the steam inlet side and on the top side of the moving blade 3 for prevention of erosion due to working steam. The length of the plate 4b is not larger than 1/4 of the effective length of the moving blade 3. This is determined based on the fact that, from the investigation of crack occurrence frequency distribution, cracks occurred mostly in the portion from 1/3 to 1/4 of the effective length and rarely occurred in the portion not larger than 1/4 of the effective length. This arrangement prevents the cracking of the plate 4b and improves safety.

24. 发明专利

JP3247676B2 HEAT RESISTANT STEEL 失效
公开(公告)号：JP3247676B2
公开(公告)日：2002-01-21
申请号：JP2000181358
申请日：2000-06-16
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , MAENO YOSHIMI , TAKAHASHI SHINTARO , KURIYAMA MITSUO , SUWA MASATERU , KANEKO RYOICHI , TAN TOSHIMI , ONODA TAKESHI , WATANABE YASUO , KAJIWARA HIDEFUMI , HIRAGA MAKOTO
IPC分类号： C21D9/38 , C22C38/00 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54 , F01D5/02 , F01D5/06 , F01D5/14 , F01D5/28

25. 发明专利

JP2001329801A HIGH AND LOW PRESSURE INTEGRATED STEAM TURBINE 失效
公开(公告)号：JP2001329801A
公开(公告)日：2001-11-30
申请号：JP2001151031
申请日：2001-05-21
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , MAENO YOSHIMI , TAKAHASHI SHINTARO , KURIYAMA MITSUO , SUWA MASATERU , KANEKO RYOICHI , TAN TOSHIMI , ONODA TAKESHI , WATANABE YASUO , KAJIWARA HIDEFUMI , HIRAGA MAKOTO
IPC分类号： F01D5/28 , C22C38/00 , C22C38/46 , F01D5/02 , F01D5/14
摘要： PROBLEM TO BE SOLVED: To manufacture a high and low pressure integrated steam turbine having large output in one turbine casing, and having a large output coverage of a single unit and high reliability. SOLUTION: This high and low pressure integrated steam turbine has a high temperature and high pressure part for steam, a medium pressure part for inflow of steam which becomes high temperature and medium pressure by reheating the steam emitted from the high temperature and high pressure part, and a low pressure part for inflow of steam which becomes low pressure through the medium pressure part. This turbine is provided with a low alloy steel-made rotor shaft integrally formed by the same composition from the high temperature high pressure part of the low pressure part, and a final stage blade having the length of a blade part planted in the low pressure part 101.6 cm or more to the rotating speed of 3,000 rpm of the rotor shaft or 85.09 cm or more to the rotating speed of 3,600 rpm, and characterized in that the temperature at a steam inlet to the high temperature and high pressure part initial stage blade is 530 deg.C.

26. 发明专利

JPH066881B2 失效
公开(公告)号：JPH066881B2
公开(公告)日：1994-01-26
申请号：JP2439384
申请日：1984-02-14
申请人： HITACHI LTD
发明人： TAN TOSHIMI , MIZOI TAKAO
IPC分类号： F01D5/06 , F01D5/02

27. 发明专利

JPH03130502A STEAM TURBINE AND ROTOR SHAFT AND HEAT RESISTING STEEL THEREOF 失效
公开(公告)号：JPH03130502A
公开(公告)日：1991-06-04
申请号：JP2199690
申请日：1990-02-02
申请人： HITACHI LTD
发明人： SHIGA MASAO , FUKUI HIROSHI , MAENO YOSHIMI , TAKAHASHI SHINTARO , KURIYAMA MITSUO , SUWA MASATERU , KANEKO RYOICHI , TAN TOSHIMI , ONODA TAKESHI , WATANABE YASUO , KAJIWARA HIDEFUMI , HIRAGA MAKOTO
IPC分类号： F01D5/06 , C22C38/00 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , F01D25/00
摘要： PURPOSE:To increase an output of a signal engine of small size with implantation made possible of a long blade by forming a rotor shaft of Ni-Cr-Mo-V low alloy steel, having specific composition, while specifying breaking strength of this low alloy steel. CONSTITUTION:In a steam turbine, blades (moving blade) are implanted in a multistage manner from a high pressure side over to a low pressure side of steam in a high low pressure integral type rotor shaft 3, and thus a rotor is formed. The periphery of the rotor is covered with a casing 6. In the above constitution, the rotor shaft 3 is formed of No-Cr-Mo-V low alloy steel having bainite structure with (Mn/Ni) ratio 0.12 or less or (Si+Mn)/Ni ratio 0.18 or less, by weight ratio. Creep destruction strength of 100,000 hours at 538 deg.C of the low alloy steel is set to 11kg/mm or more. In this way, a long blade can be implanted with an output increase made possible of a single engine in small size.

28. 发明专利

JPH02161104A MANUFACTURE OF STEAM TURBINE ROTOR SHAFT 失效
公开(公告)号：JPH02161104A
公开(公告)日：1990-06-21
申请号：JP30311889
申请日：1989-11-24
申请人： HITACHI LTD
发明人： YOSHIOKA TAKATOSHI , KIRIHARA SEISHIN , SHIGA MASAO , YOSHIDA TAKEHIKO , KUNO KATSUKUNI , TAN TOSHIMI , KOBAYASHI MASAHIRO
IPC分类号： F01D5/02 , B23K9/04
摘要： PURPOSE:To enhance the bearing characteristic of a journal part by forming the most external surface of a build-up welding layer formed on the journal part, with a welding rod consisting of steel which contains only a specified percentage of Cr, and then afterward giving to its stress relief annealing. CONSTITUTION:In a steam turbine rotor shaft, a power generation side shaft 2 is connected to a rotor shaft main body 1 through a coupling 3, and a build-up welding layer 5 is formed on its journal part opposedly facing a bearing 4. The rotor shaft main body 1 is formed of a martensite high Cr steel. In this case, at least three outermost layers of the build-up welding layer are formed with welding rod consisting of steel which contains Cr by 0.5-3 in weight percentage. Stress relief annealing is given after the formation, which enables to obtain a steam turbine rotor shaft with a journal part excellent in bearing characteristics.

29. 发明专利

JPS63241341A DAMAGE EVALUATOR FOR ROTOR CENTER HOLE 失效
公开(公告)号：JPS63241341A
公开(公告)日：1988-10-06
申请号：JP7410287
申请日：1987-03-30
申请人： HITACHI LTD
发明人： SAKURAI SHIGEO , MIYATA HIROSHI , TAN TOSHIMI , KANEKO RYOICHI
IPC分类号： G01N21/88 , F01D5/00 , G01N21/954
摘要： PURPOSE:To determine the degree of damage in a non-destructive manner and with a high accuracy, by making a judgement based on relationship between growth of a fine damage generated in the surface of a member early in the life and the life itself. CONSTITUTION:A damage detector 6 is inserted into a center hole 15 of a turbine rotor 14 and linked to a driving rod 7 to be moved axially. The driving rod 7 is provided successively to a driving section 8 and a specified amount of movement and position thereof are detected. The height-wise movement of the driving rod is linked with a connecting column 16 to adjust the amount of movement thereof with a vertical movement driving section 9. A signal from the detector 6 is turned to an image proper in the focus and magnification with a CRT 10 and an image controller 11 and an image processor 12 calculates the size of damage and samples sampling of data. The damage sampled is statistically processed with an arithmetic decision device 13 and the degree of damage of an object area is displayed on the CRT 10 containing various statistical evaluations including a mean and dispersion.

30. 发明专利

JPS6033966B2 失效
公开(公告)号：JPS6033966B2
公开(公告)日：1985-08-06
申请号：JP13151678
申请日：1978-10-27
申请人： HITACHI LTD
发明人： TAN TOSHIMI , KUNO KATSUKUNI , MIZOI TAKAO
IPC分类号： F01D5/00 , F01D25/00

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