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51. 发明专利

JP2003132169A MAINTENANCE SERVICE PROVIDING SYSTEM 审中-公开
公开(公告)号：JP2003132169A
公开(公告)日：2003-05-09
申请号：JP2001330118
申请日：2001-10-29
申请人： HITACHI LTD
发明人： WADA NORIHISA , SUZUKI MANABU , OKABE AKIRA , KANEDA HIDEAKI
IPC分类号： G06Q50/00 , G06Q50/10 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To provide a maintenance service providing system capable of allowing a consumer to easily grasp the contents of maintenance service of a provider, to easily exchange the information on the maintenance service between the consumer and the provider, and further to easily provide the maintenance service. SOLUTION: Component devices of the turbine equipment are incrementally classified and displayed as indexes, and the component devices are transferrable among related indexes. A maintenance service menu including the exchanging, improving and remodeling items of the component device is displayed corresponding to the selected component device. A maintenance service package (including the documentation of maintenance service, a list of maintenance service parts, and a list of maintenance service work items) corresponding to the maintenance service selected by the maintenance service menu, is displayed. The consumer can browse each content of the maintenance service package, and order the maintenance service package.

52. 发明专利

JP2000205563A CONTROL METHOD OF GAS TURBINE 失效
公开(公告)号：JP2000205563A
公开(公告)日：2000-07-25
申请号：JP258999
申请日：1999-01-08
申请人： HITACHI LTD
发明人： ENDO TOMOYOSHI , KANEDA HIDEAKI , KIMURA YOTARO , KOMATSU YASUTAKA , SUZUKI TSUGIO
IPC分类号： F02C9/00 , F02C9/34 , F23N5/24 , F23R3/30
摘要： PROBLEM TO BE SOLVED: To shorten the time required for resetting a plant to a predetermined load by making a decision that combustion is abnormal when the combustion state of a combustor or a gas turbine exceeds an allowable value and sustaining the operation while lowering the gas turbine load down to a partial load. SOLUTION: Combustor metal temperature 13 of a plurality of two stage combustors 1 arranged around a gas turbine is detected by means of total n thermocouples 11 fixed to the second stage combustion section of each combustor 1. Operating unit 17a-17c take in the measurement of respective combustor metal temperatures 13 and when any one of individual allowable temperatures, fluctuation widths or variation rates of the measurements exceeds a preset allowable value, a decision is made that combustion is abnormal and signals 18-20 are delivered. As an example, allowable temperature is set at 750 deg.C while taking account of the melting point of material at the combustor metal part thus protecting n apparatus against damage.

53. 发明专利

JPH11166425A PRESSURIZED FLUID BED BOILER PLANT 失效
公开(公告)号：JPH11166425A
公开(公告)日：1999-06-22
申请号：JP25783498
申请日：1998-09-11
申请人： HITACHI LTD
发明人： SATO SATORU , TAKABA MINORU , KANEDA HIDEAKI
IPC分类号： F01D21/14 , F01D21/16 , F01K23/06 , F02C3/26 , F02C9/00 , F23C10/16 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To detect the surging of a gas turbine early and to safely stop the gas turbine by determining a plant abnormality when the changing speed of the output of a generator connected to the turbine driven by combustion gas from a pressurized fluid bed boiler exceeds a set output value. SOLUTION: The pressure container 2 of a PFBC(pressurized fluid bed combustion) boiler 1 is provided with a flow rate control pressure reducing valve 13 for adjusting the flow rate of blown air in the upstream of a compressor 6 for blowing combustion air. An exhaust heat recovery system 9 is provided in the downstream side of a gas expander turbine 7 for generating motive power by expanding combustion gas from the PFBC boiler main body in the pressure container 2. Then, the changing speed of the gas turbine output is compared with a limit value by a signal computing unit 37 based on a gas turbine output signal computed by an output computing unit 36 and, if a surging state is determined, a gas turbine stop signal is outputted to a plant controller 40, and a gas turbine 7 is stopped by closing valves 17 and 19.

54. 发明专利

JPH11132057A GAS TURBINE FOR PRESSURIZED FLUID BED BOILER 失效
公开(公告)号：JPH11132057A
公开(公告)日：1999-05-18
申请号：JP29667797
申请日：1997-10-29
申请人： HITACHI LTD
发明人： KAWAMURA FUMIYA , SATO SATORU , KANEDA HIDEAKI , HIROSE FUMIYUKI
IPC分类号： F01K23/10 , F02C3/28 , F02C6/00 , F02C6/08 , F02C9/00 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To prevent abnormality from occurring in a gas turbine by detecting abnormality of opening of a compressor outlet valve when operated with closing the compressor outlet valve and a high temperature gas valve and opening a compressor bypass valve during starting the gas turbine, and by tripping the gas turbine when the abnormality is detected. SOLUTION: A gas turbine for a pressurized fluid bed boiler (PFBC), during its starting, increases its speed up to a nominal rotation speed with a starting device in the condition that a compressor outlet valve 4 and a high temperature gas valve 5 are closed and a compressor bypass valve 6 is opened. After the speed rising, the turbine continues to operate at the nominal rotation speed until finishing of starting preparation of a furnace. During this, if the compressor outlet valve 4 is operated by any abnormality, a system in which delivering air in a compressor 1 flows into the furnace through the compressor outlet valve 4 is generated, delivery pressure of the compressor sharply decreases, and finally vibration occurs in the compressor 1 to damage the gas turbine. Therefore, when abnormality of the compressor outlet valve 4 is detected, the gas turbine is tripped to prevent its damage.

55. 发明专利

JPH10184313A STEAM TURBINE 失效
公开(公告)号：JPH10184313A
公开(公告)日：1998-07-14
申请号：JP34304696
申请日：1996-12-24
申请人： HITACHI LTD
发明人： TSUBOI NOBUYOSHI , KATO FUMIO , YAMAZAKI HARUYUKI , YOKOTA OSAMU , MUROBOSHI TAKANORI , YAMANAKA KAZUNORI , KANEDA HIDEAKI
IPC分类号： F01D17/24
摘要： PROBLEM TO BE SOLVED: To operate governing valves with an area causing little vibration and noises in response to required steam flow amount in a steam turbine having plural governing valves by controlling numbers and flow amounts of the valves to be operated according to flow amount commands. SOLUTION: An MPU 102 executes total control based on command of a host computer 700. It provides a governing valve controlling processor MPU 704 with flow amount distribution of each governing valve 300, and also provides a boiler 100 with a command value of generated steam amount from a starting pattern 706 and a constant operation pattern 708. The MPU 704 computes a steam flow amount of the governing valve, and gives opening commands to the governing valves 300. During normal operation, an opening setting signal of the governing valves 300 is outputted based on the deviation between power generation output 720 and load requirement from the constant operation pattern 708. The governing valves 300 are controlled so as to be operated with openings causing little vibration and noises in response to the flow amount command from the host computer 700.

56. 发明专利

JPH0681887B2 失效
公开(公告)号：JPH0681887B2
公开(公告)日：1994-10-19
申请号：JP2896286
申请日：1986-02-14
申请人： HITACHI LTD
发明人： KANEDA HIDEAKI
IPC分类号： F01D13/00 , F01D21/00 , F01D21/14 , F01K23/10

57. 发明专利

JPH059606B2 失效
公开(公告)号：JPH059606B2
公开(公告)日：1993-02-05
申请号：JP15964387
申请日：1987-06-29
申请人： HITACHI LTD
发明人： KANEDA HIDEAKI , IIJIMA TADAHIKO , YANAGIDA SADAO , KUWAJIMA HIDESUMI
IPC分类号： F01D21/02 , F01D21/14

58. 发明专利

JPH02221604A METHOD AND DEVICE FOR CONTROLLING POWER PLANT AND POWER PLANT 失效
公开(公告)号：JPH02221604A
公开(公告)日：1990-09-04
申请号：JP4034889
申请日：1989-02-22
申请人： HITACHI LTD
发明人： KANEDA HIDEAKI , IIJIMA TADAHIKO
IPC分类号： F01D21/00 , F01D21/02 , F01D21/14
摘要： PURPOSE:To effectively prevent a steam turbine in any case from being excessively accelerated by suddenly closing a control valve for the speed of the turbine when the speed detection value of the steam turbine rises to above a speed definition value preset as a load function. CONSTITUTION:In order to control a power plant, it is detected 30 first whether or not the load during operation of the power plant is more than the x% of all the loads. Next, it is defecated 31 whether or not the detection value of the turbine speed is more than a definition value preset as a load function. When all the results of diagnosis are affirmative, then a control valve sudden closing command 19 is outputted to a sudden closing solenoid valve 17 so as to cut off steam supply to the turbine. The turbine speed is thus set as a direct condition for suddenly closing the control valve, so that the excessive acceleration of the steam turbine is prevented effectively and in any case regardless of operational conditions of the steam turbine.

59. 发明专利

JPH01216005A TURBINE CONTROL DEVICE 失效
公开(公告)号：JPH01216005A
公开(公告)日：1989-08-30
申请号：JP4313088
申请日：1988-02-25
申请人： HITACHI LTD
发明人： KAWAI TAKUMI , ISHIKAWA TOSHIYOSHI , IIJIMA TADAHIKO , KANEDA HIDEAKI
IPC分类号： F01D21/00
摘要： PURPOSE:To prevent sudden closing of an intercept valve during normal operation by providing a restricting means on changing rate of an intercept valve opening signal and a releasing means from restriction on the changing rate of the intercept valve opening signal to a means to control opening of the intercept valve. CONSTITUTION:A malfunction preventing circuit 50 is interposed in a controlled system which provides a final load signal that is output from a load distributing part 38 of a turbine controlling device to an intercept valve. The malfunction preventing circuit 50 is equipped with a restricting circuit 504 on changing rate, which restricts such a large signal that a dash pot of an intercept valve mechanism acts when the large signal is input during normal operation. And the malfunction preventing circuit 50 is also equipped with a releasing circuit from restriction on changing rate, which is composed of a one-shot circuit 503 which is connected to the restricting circuit 504, an OR circuit 502, a turbine acceleration detecting circuit 501, a subtracter 505, an absolute value circuit 506 and comparator 507. Thereby sudden closing of the intercept valve during normal operation is prevented, while sudden closing at the time of load shutdown is made possible.

60. 发明专利

JPS63243407A QUICK CLOSE CONTROL DEVICE FOR INTERCEPT VALVE 失效
公开(公告)号：JPS63243407A
公开(公告)日：1988-10-11
申请号：JP7580087
申请日：1987-03-31
申请人： HITACHI LTD
发明人： IIJIMA TADAHIKO , YANAGIDA SADAO , KUWAJIMA HIDESUMI , KANEDA HIDEAKI
IPC分类号： F01K7/24 , F01D17/00 , F01D21/14
摘要： PURPOSE:To ensure continuity to the stable operation of a turbine in a later stage by interrupting the re-operation of an intercept valve quick close device in a turbine speed control range until an intercept valve becomes again wide open after closing quickly. CONSTITUTION:When a turbine speed sharply increases immediately after the interruption of a load and the number of turbine revolutions exceeds the predetermined value, an intercept valve quick close circuit 24 judges that a turbine is giving an overspeed. According to the result of the judgement, the first FF circuit 24B of a quick close interruption means 27 generates a quick close signal and an intercept valve 7 closes quickly via an intercept valve quick close means 25. Concurrently therewith, the second FF circuit 24F is set and output from the second reversal circuit 24G turns into L, thereby closing an AND gate 24E. Thereafter, when a turbine speed drops to the predetermined value, the intercept valve 7 begins to open again. In this case, even if the turbine is judged to be overspeeding, the first FF circuit 24B does not change a mode and a quick close signal is not outputted.

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