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91. 发明专利

JPH04186014A FLAME SPECTRAL DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH04186014A
公开(公告)日：1992-07-02
申请号：JP31385190
申请日：1990-11-21
申请人： HITACHI LTD
发明人： KATO FUMIO , ISHIBASHI YOJI , OMORI TAKASHI , AKATSU SHIGEYUKI , YOKOTA OSAMU
IPC分类号： G01M15/14 , F23M11/04 , F23N5/08 , F23R3/00 , G01M15/00
摘要： PURPOSE:To enhance the evaluation accuracy of flame stabilizing performance by image-measuring the distribution of OH radical light emission near a flame stabilizer, selecting some typical measurement points, measuring time change of light emission, computing correlation between two points, deciding flame fluctuation characteristics, and evaluating the flame stabilizing performance. CONSTITUTION:An optical probe 14 takes out a flame image by way of an optical cylinder 15 and divides the image into a monitor TV 30 and an image expander 33 by means of an image distributor where the image is expanded with the image expander 33. A stepping motor 40 is arranged to move a light receiver 35 based on the instructions of a computer 32 and the partial images at several points in conformity with the purpose are incorporated. The images are fed to a waveform correlation analyzing device 39 by way of a waveform recording device 38 where various kinds of correlation are calculated and the calculated values are compared with a reference value of flame fluctuations predetermined by a comparator 42. The computer 32 evaluates the flame stability and flame holding performance at the flame position based on the evaluation results.

92. 发明专利

JPH04104243A SPECTRAL IMAGE DEVICE 失效
公开(公告)号：JPH04104243A
公开(公告)日：1992-04-06
申请号：JP22133690
申请日：1990-08-24
申请人： HITACHI LTD
发明人： KATO FUMIO , ISHIBASHI YOJI , OMORI TAKASHI , AKATSU SHIGEYUKI , YOKOTA OSAMU
IPC分类号： G01J3/443 , G01N21/25 , G02B27/10 , G03B33/12 , G06T1/00 , H04N5/225 , H04N7/18
摘要： PURPOSE:To easily form the image of equal size and the image of equal intensity by providing an optical amount where plural image branching optical parts for dividing the image are fixed and arranged to satisfy a specified optical condition and an optical path change finely adjusting device which adjusts the fine deviation of an optical path made incident on a video device. CONSTITUTION:The image is branched by a half mirror mount 3, a half mirror 4 and a total reflection mirror 5 which are integrated to be formed as a device. The optical path finely adjusting device 10 is provided with a clockwise and counterclockwise rotating frame 19 supported to a fixed frame 18 by a pair of up-and-down clockwise and counterclockwise rotating shafts 21 and 21 inside the frame 18. Then, a thick quartz plate 23 is fitted in the frame 19. The emitted position of the light made incident on the plate 23 is changed according to the tilt angle and the refractive index of the quartz plate, but the refractive index is constant, so that the optical path is optionally changed corresponding to the tilt angle and the deviation of the optical path made incident on the video device 12 is corrected. Thus, the deviation of the optical path is easily adjusted and the work of forming the sized image is facilitated.

93. 发明专利

JPH03207912A FLAME SPECTROSCOPIC IMAGE DISPLAY FOR GAS TURBINE COMBUSTION DEVICE 失效
公开(公告)号：JPH03207912A
公开(公告)日：1991-09-11
申请号：JP51190
申请日：1990-01-08
申请人： HITACHI LTD
发明人： KATO FUMIO , ISHIBASHI YOJI , HASHIMOTO TAKASHI , OMORI TAKASHI , INOUE HIROSHI , AKATSU SHIGEYUKI , YOKOTA OSAMU , KURODA MICHIO
IPC分类号： G01N21/71 , F23N5/08
摘要： PURPOSE:To instantaneously determine the ignition of a flame and the flame stability by a method wherein luminous components corresponding to three particular radicals among self-luminescent rays, which are generated from a flame near by the middle stream of a two-stage combustion, are separated from the total emission amount. CONSTITUTION:A flame image is condensed in a probe 12 by an object glass 13 equipped on the flame side tip of the probe 12, and the light rays made parallel by a lens 14 are transformed into three light beams A, B and C by half-mirrors 15 and 16. Luminous spectrums selected by an optical filter 20 are projected on a fluorescent screen on the rear part of an image intensifier 21 after amplified and converted to visible rays, and the images are formed on an image element of CCD camera 23. The three images are sent by a gating device 24 and a computer 26 to an image processor through an image controller 25, and image analysis takes place. Thereby, the distribution of three radicals OH, CH and C2 among the flame light emissions generated can be measured from the images at the same time, so that flame monitoring and combustion state analysis can be performed.

94. 发明专利

JPH0343534B2 失效
公开(公告)号：JPH0343534B2
公开(公告)日：1991-07-02
申请号：JP17329684
申请日：1984-08-22
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , SATO ISAO , KURODA MICHIO , UCHAMA YOSHIHIRO , WADA KATSUO , IIZUKA NOBUYUKI , KATO FUMIO , SEGAWA YORIHIDE , OOMORI TAKASHI , AKATSU SHIGEYUKI
IPC分类号： F02C9/50 , F02C9/28 , F23R3/26

95. 发明专利

JPH0399108A LOW NOX BURNER 失效
公开(公告)号：JPH0399108A
公开(公告)日：1991-04-24
申请号：JP23281489
申请日：1989-09-11
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , INOUE HIROSHI , OMORI TAKASHI , KATO FUMIO , AKATSU SHIGEYUKI , KURODA MICHIO
IPC分类号： F23D14/02 , F23C99/00 , F23D14/24 , F23D14/48
摘要： PURPOSE:To stabilize combustion in a wide area of operation in a low NOx gas turbine combustor by premixture combustion method by changing in the same rate the area of a flow channel which connects the air flow-in section of a premixing device which receives the air from a compressor and the flow-out section of air and fuel mixture gas. CONSTITUTION:A premixing device 3 defines and forms an annular flow channel with an outer circumferential wall 4 and a circumferential wall 5 which have their diameters increased gradually towards the upstream side of a burner 2, and forms at the end of the upstream an air flow-in opening by a plane parallel to the axial direction of the burner, and makes the downstream end open in a combustion chamber 12. And the annular flow channel that is formed with the outer circumferential wall 4 and inner circumferential wall 5 is formed with a substantially uniform flow channel area from the inlet section to the outlet section. With this constitution it is possible to provide premixture combustion which is stable.

96. 发明专利

JPH0331612A PREMIXING DEVICE FOR GAS TURBINE COMBUSTION 失效
公开(公告)号：JPH0331612A
公开(公告)日：1991-02-12
申请号：JP16399589
申请日：1989-06-28
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , INOUE HIROSHI , OMORI TAKASHI , KATO FUMIO , AKATSU SHIGEYUKI , KURODA MICHIO
IPC分类号： F23R3/30 , F23L1/00
摘要： PURPOSE:To conduct low NOx combustion in the large range of operation of a gas turbine by installing a flow straightening device in the air flow channel of a premixing device and holding uniform the air flow in the premixing device even if the area of air flow-in of the premixing device changes. CONSTITUTION:A premixing device 3 is formed by an annular flow channel that is divided by an outer circumferential wall 4 and an inner circumferential wall 5 which extend in the direction of the shaft of a burner, and the upstream end of the device 3 is a face parallel to the direction of the shaft of the burner and forms a flow-in opening through which premixture air flows in and the downstream end opens in a combustion chamber 12, and in the annular flow channel a plurality of fuel nozzle 7 with fuel injection hole 16 to supply premixed fuel 101 are mounted on the same circumference and, on the upstream side of the fuel injection hole 6 an annular flow straightening plate 13 is provided. Further, said flow-in opening is adjusted in its area of opening by a slide ring 14 mounted on the outer circumference of the flow-in opening. And, in the inner circumferential section of the premixing device 3 an auxiliary burner nozzle 8 provided with a fuel injection hole 17 is installed. With this constitution premixing air 100' is straightened in its flow by the flow straightening plate 13 provided in the annular flow channel of the premixing device 3 so that uniformity of flow is kept, and it is possible to supply the premixing gas 103 into the combustion chamber 12 with a uniform flow distribution and concentration distribution.

97. 发明专利

JPH02187521A GAS-TURBINE BURNER 失效
公开(公告)号：JPH02187521A
公开(公告)日：1990-07-23
申请号：JP602889
申请日：1989-01-17
申请人： HITACHI LTD
发明人： INOUE HIROSHI , ISHIBASHI YOJI , AKATSU SHIGEYUKI , OMORI TAKASHI , KATO FUMIO , HASHIMOTO TAKASHI , KURODA MICHIO
IPC分类号： F23R3/30
摘要： PURPOSE:To obtain a uniform fuel-gas premixture at all times, and to reduce the generation of NOx by providing a smoothening chamber between a valve for varying the opening area of an after air stream inlet port for air for premixture combustion and a fuel-air premixture flow passage in the downstream of the valve. CONSTITUTION:Air 1 which has flowed through a path between a burner casing 3 and a burner liner 5 is partly adjusted in its flow amount by a slide valve 15 in accordance with a load and flows into a smoothening chamber 20. After smoothened, the air is guided into a fuel-air premixture flow passage 6 where the air is mixed with the fuel 11 ejected from a fuel nozzle 12, and is converted to a uniform fuel-air premixture to be ejected into a combustion chamber 8 for premixture combustion. According to this arrangement, the flow pattern of the premixture in the fuel-air premixture flow passage 6 becomes substantially constant without depending upon an opening degree of the slide valve 15, and the uniformity of the premixture is maintained. Thus, harmful carbon monoxide can be prevented from being discharged, and stable premixture combustion covering a wide range can be carried out.

98. 发明专利

JPH01118023A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH01118023A
公开(公告)日：1989-05-10
申请号：JP27300087
申请日：1987-10-30
申请人： HITACHI LTD
发明人： INOUE HIROSHI , ISHIBASHI YOJI , HASHIMOTO TAKASHI , AKATSU SHIGEYUKI , KATO FUMIO , OMORI TAKASHI , KURODA MICHIO
IPC分类号： F23R3/32
摘要： PURPOSE:To provide a low NOx combustor, by a method wherein an annular air flow passage is formed coaxially with fuel-air premixture flow passage, and a fuel nozzle port for a pilot flame is formed in a wall member by which the two flow passages are separated. CONSTITUTION:Air from an compressor enters a combustor casing 20, a part thereof flows in a fuel-air premixture flow passage 3 through a fuel-air premixture flow passage inlet 1 and is mixed with fuel through a fuel nozzle 2 to produce fuel-air premixture having low fuel concentration, which flows in a combustion chamber 10. Remaining partial air passes a head part cover 27 and flows through an air flow passage 4 to the combustion chamber 10. A small and stable circulating flow is formed on the combustion chamber side of a partition wall part 5 by means of a fuel-air premixture flow and an air flow flowing on both sides. A small amount of fuel for a pilot flame flowing through a pilot fuel flow passage 6 and flowing out through a pilot fuel injection nozzle 7 forms a pilot flame in a circulating flow region. A mixture ratio can be set in the circulating region to a value approximately similar to a theoretical mixture ratio, and brisk combustion reaction takes place to produce a stable pilot flame. Fuel-air premixture flowing out from the fuel-air premixture flow passage 3 forms a stable fuel-air premixture flame in a wide range of fuel-air premixture concentration by means of a pilot flame serving as an ignition source.

99. 发明专利

JPS61153316A COMBUSTION OF GAS TURBINE AND GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPS61153316A
公开(公告)日：1986-07-12
申请号：JP27878884
申请日：1984-12-25
申请人： HITACHI LTD
发明人： ISHIBASHI YOJI , SATO ISAO , KURODA MICHIO , UCHIYAMA YOSHIHIRO , KATO FUMIO , SEGAWA YORIHIDE , OMORI TAKASHI , AKATSU SHIGEYUKI , IIZUKA NOBUYUKI , WADA KATSUO , ARAI OSAMU
IPC分类号： F23R3/26
摘要： PURPOSE:To permit to effect premixed combustion stably and nicely from a low load to a high load and reduce generation of NOx within wide load range by a method wherein the amount of premixed air in second stage is changed so as to cope with the amount of fuel in the second stage to operate the stage within a predetermined fuel-air ratio. CONSTITUTION:First stage fuel F1 is injected to one end of a sub chamber 1 through several pieces of nozzle 10 and the second stage fuel F2 is premixed with air A2 injected through a plurality of nozzles 20 in a swirler 3, thereafter, enters into a main chamber 2 and is burnt there. A variable air flow amount cylinder 4 is set at a position 4' prior to the switching of fuel when the fuel F2 is thrown or the fuel F1 has arrived at a predetermined flow amount, therefore, the cylinder 4 chokes the inflow window 6 of air A2 to reduce the amount of inflow air and a part of it flows into the combustor after being distributed to first stage combustion air A1, diluting air A3 and liner cooling air. Accordingly, the equivalent ratio of first stage combustion is shifted toward smaller ratio and low NOx combustion may be effected while the temperature of a liner forming member is reduced and the fuel equivalent ratio phi in the second stage combustion may be set at a predetermined value.

100. 发明专利

JPS5872603A AIR-COOLED GAS TURBINE ROTOR 失效
公开(公告)号：JPS5872603A
公开(公告)日：1983-04-30
申请号：JP17006281
申请日：1981-10-26
申请人： HITACHI LTD
发明人： MATSUMOTO MANABU , KOBAYASHI SHIGEYOSHI , SHIZUTANI MITSUTAKA , AKATSU SHIGEYUKI
IPC分类号： F01D5/08
摘要： PURPOSE:To decrease a circulative flow loss and improve a cooling effect, in a turbine rotor of air introduction method, by arranging a plural number of flat plate-shaped guide vanes radially extended in the circumferential direction of a radial flow line. CONSTITUTION:A guide vane 10 is provided in a radial flow line 9 between a disc 3c and stub shaft 5b, and fixed by bolts 11 to an end face of the stub shaft 5b. While the guide vane unit 10 is secured to a base plate 10b in such a manner that a plural number of flat plate-shaped guide vanes 10a are regularly arranged circumferentially with the radial direction as the longitudinal. In this way, a flow in a free swirl state is changed to a one-dimensional flow in the radial direction, and a circulative flow loss can be reduced.

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