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31. 发明专利

JPH11311128A BLEED STRUCTURE IN COMPRESSOR ROTOR 失效
公开(公告)号：JPH11311128A
公开(公告)日：1999-11-09
申请号：JP11818698
申请日：1998-04-28
申请人： HITACHI LTD
发明人： SEKIHARA TAKASHI , MACHIDA TAKASHI
IPC分类号： F02C3/073 , F02C9/18 , F04D29/58
摘要： PROBLEM TO BE SOLVED: To reduce costs in association with employment of low alloy steel for reinforcing cooling by forming a compressor rotor provided with a front stage rotor disk in which a plurality of moving blades are installed on an outer periphery and a rotary shaft is extendedly provided forward, and a back stage rotor disk in which a plurality of moving blades are installed on an outer periphery and a rotary shaft is extendedly provided backward. SOLUTION: A compressor rotor is composed of a plurality of moving blades 2 for receiving work from respective fluids, a plurality of rotor disks 1 stacked in a multiple stage shape, and a stacking bolt for performing fastening while penetrating on the rotor disks 1. A front rotor disk 1 is provided with a rotary shaft 12 which extends forward, and a back rotor disk 1 is provided with a rotary shaft 12 which extends backward. An operating fluid of a low temperature side flowing the gas path of a compressor can be uniformly bled into the compressor rotor disks 1, and a warm operation and the like at the time of start can be improved.

32. 发明专利

JPH10317907A COMPRESSOR BLADE FIXING CONSTRUCTION 失效
公开(公告)号：JPH10317907A
公开(公告)日：1998-12-02
申请号：JP13187897
申请日：1997-05-22
申请人： HITACHI LTD
发明人： MACHIDA TAKASHI , YOSHIMURA TOSHIHIKO , SEKIHARA TAKASHI
IPC分类号： F01D5/30 , F04D29/34
摘要： PROBLEM TO BE SOLVED: To restrain leakage of working fluid at a minimum at operating a gas turbine so as to improve compressor efficiency by forming a slip-out preventing part of the end part of a blade fixing part into a form covering the gaps between a moving blade root part and a rotor disc fitting groove. SOLUTION: The blade root part 2 of a compressor blade 1 is inserted into the fitting groove 4 of a rotor disc 3 to be fixed with a blade fixing part 5. The sizes of slip-out preventing plates 7, 8 are made into flat plates larger than the fitting groove 4. Thus the slip-out preventing plates 7, 8 can completely cover gaps 10, and at operating a gas turbine, working fluid can be prevented from leaking through the gaps 10. Further, a holding groove 11 for holding the support part 6 of the blade fixing part 5 is arranged on the bottom part of the fitting groove 4 of the rotor disc 3, and by holding the support part 6 of the blade fixing part 5 slightly in the inner circumferential side from the bottom part of the fitting groove 4, the slip-out preventing plates 7, 8 can completely cover the gaps 10.

33. 发明专利

JPH09242505A TURBINE STRUCTURE 失效
公开(公告)号：JPH09242505A
公开(公告)日：1997-09-16
申请号：JP5287996
申请日：1996-03-11
申请人： HITACHI LTD
发明人： MACHIDA TAKASHI , SEKIHARA TAKASHI
IPC分类号： F01D5/02 , F01D11/00 , F01D11/02 , F02C7/28
摘要： PROBLEM TO BE SOLVED: To enhance sealing characteristics and improve efficiency and reliability by overlapping the tip ends of diaphragms adjacent to each other in an axial direction in a gas turbine rotor. SOLUTION: A plurality of turbine moving blades 1 are fitted around the outer periphery. The tip ends of diaphragms 6 adjacent to each other are tapered, and are assembled in a manner overlapped with each other in an axial direction. Even if the diaphragms 6 are deformed by centrifugal force during operation of a gas turbine, no gap is produced in the axial direction. The diaphragm 6 positioned on the inner circumferential side is set smaller in bending rigidity than the other positioned on the outer peripheral side, so that sealing can be carried out by contact at the time of deformation by the centrifugal force. Consequently, it is possible to improve a sealing function so as to enhance efficiency, and to prevent combustion gas from flowing into the inner circumferential side of a disk so as to enhance reliability.

34. 发明专利

JPH0988504A COMPRESSOR AND GAS TURBINE 失效
公开(公告)号：JPH0988504A
公开(公告)日：1997-03-31
申请号：JP24432395
申请日：1995-09-22
申请人： HITACHI LTD
发明人： SEKIHARA TAKASHI , MACHIDA TAKASHI , ISHII HIROSHI
IPC分类号： F01D5/06 , F01D5/10 , F01D11/02 , F02C3/06 , F04D11/00 , F04D19/02
摘要： PROBLEM TO BE SOLVED: To improve flexural rigidity in vibration of a shaft system of a rotor having stacked structure of a compressor and seal a section between a tip of a variable static blade and an outer peripheral face of the rotor. SOLUTION: A rotor 1 which is fixed by embedding a dove tail 16 in a root section of a moving blade 2 in a groove 13 in an outer peripheral section is provided. Holes are provided on a contact face 18 which is provided on the rotor and in contact with adjacent rotor. A stacking bolt 3 which passes through all the rotors and are tightened and stacked and a stacking bolt 4 which passes through a rotor in a region which is equivalent to a belly section in vibration of a shaft system among rotors and is tightened are provided. Moreover, a shroud 12 is provided at a tip of a variable static blade 11, and a rotor having a labyrinth seal 14 on an outer surface which is in contact with the shroud is provided. Owing to this constitution, it is possible to improve flexural rigidity effectively and further improve torque transmission capacity. Moreover, it is possible to seal a section between the tip of the variable static blade and an outer peripheral face of the rotor effectively without increasing rotary inertia term of the shaft system.

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