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21. 发明专利

JPH06308140A FIBER TYPE LASER DOPPLER FLOW METER 失效
公开(公告)号：JPH06308140A
公开(公告)日：1994-11-04
申请号：JP9314793
申请日：1993-04-20
申请人： HITACHI LTD
发明人： KOBAYASHI SHIGEYOSHI , INOUE HIROSHI , HAYASHI NORIYUKI , AZUHATA SHIGERU
IPC分类号： F23N5/08 , G01P5/00
摘要： PURPOSE:To measure flow rate in two-dimensional area by providing a mirror that reflects radiation light to a measurement point so that Doppler signal there is reflected to a photo- detection part and also a radiation part and a fixed part, mutually lacked in such a way they are allowed to move forward and backward in the direction of optical axis of the radiation light to the mirror. CONSTITUTION:The laser light from a laser oscillation device comes, through an optical fiber 4, into a laser radiation/Doppler signal photo-detection part 14, and then radiated by a lens 21, and further reflected on an aluminum-deposited surface 12 of a mirror 11, and then, through a window 17, a crossing paint 24 of the laser light 22 is formed at a speed measurement position in the fluid whose speed is to be measured. When a seed material that flows in the fluid together passes by a crossing point 24, the reflected light containing the Doppler signal issued when detecting the laser light 22 comes, through the window 17, into the mirror 11, and then is reflected and condensed on the photo-detection part 14. The light is introduced into a photomultiplier, and, through photoelectric conversion, comes into a signal process device, so that flow rate at the crossing point 24 is calculated. Alternately, by moving an outside tube 10 in the direction of axis and an inside tube 15 in the direction of axis accordingly, for the position of crossing point 24 to be changed in two-dimensional manner, flow rate may be measured.

22. 发明专利

JPH06307642A FLAME HOLDING DEVICE OF PREMIXING COMBUSTION DEVICE 失效
公开(公告)号：JPH06307642A
公开(公告)日：1994-11-01
申请号：JP9410893
申请日：1993-04-21
申请人： HITACHI LTD
发明人： INNAMI TAMIO , INOUE HIROSHI
IPC分类号： F23R3/32
摘要： PURPOSE:To enable a temperature of a flame holding device to be reduced and as a result to reduce a thermal fatigue of the flame holding device by a method wherein heat entered from the end part of the flame holding device acting as a heated part is thermally radiated to air mixture of low temperature within a mixing device. CONSTITUTION:A thermal conductive member 8 having a higher thermal conductivity than that of a main material constituting a flame holding device is assembled at a part of the flame holding device not facing to flame. Heat entering from an end 2 of the flame holding device acting as a heated surface can be thermally radiated from a contact surface between the better thermal conducting member 8 and the air mixture gas 6 into the air 5 and mixture gas 6 of low temperature within a mixing device 7.

23. 发明专利

JPH06269121A SERVICE-INTERRUPTION MINIMIZATION SYSTEM AND OPERATING METHOD FOR DISTRIBUTION LINE 失效
公开(公告)号：JPH06269121A
公开(公告)日：1994-09-22
申请号：JP5161193
申请日：1993-03-12
申请人： HITACHI LTD
发明人： NISHIJIMA KAZUO , INOUE HIROSHI , KANAI MINORU , MIYAZAKI TERUNOBU , NAKAMURA MITSURU
IPC分类号： H02H3/06 , H02H7/26 , H02J3/04
摘要： PURPOSE:To minimize the service-interruption section and the service- interruption time in a short-circuit accident of a system by a method wherein a short-circuit accident section is specified, switches at its front and its rear are opened and a matching switch is closed. CONSTITUTION:When a master station M receives a signal having the name of, e.g. a slave station K2 from the slave station K2, it orients an accident point on the basis of the name of the slave station K2, it instructs the slave station K2 to open a switch Sw2, and it opens the switch Sw2. As a result, distribution Sections L3 to L6 in a first distribution line are set to a service interruption. Then, the master station M instructs a slave station K3 closest to the side opposite to a power supply of the slave station K2 to open a switch Sw3, and the switch Sw3 is opened. In addition, the master station M instructs a slave station K6 as a present matching point to close a switch Sw6, and it closes the switch Sw6. Thereby, the service-interruption section and the service- interruption time in a short-circuit accident of the title system can be minimized.

24. 发明专利

JPH05195821A COMBUSTOR 失效
公开(公告)号：JPH05195821A
公开(公告)日：1993-08-03
申请号：JP615192
申请日：1992-01-17
申请人： HITACHI LTD
发明人： INNAMI TAMIO , SASAO TOSHIBUMI , INOUE HIROSHI , YOSHIDA SHOHEI , TSUKAHARA SATOSHI , OTAWARA YASUHIKO , KURODA MICHIO
IPC分类号： F02C9/28
摘要： PURPOSE:To attain lean-combustion where fuel concentration of premixture air is thinned to the utmost, and suppress generation of nitrogen oxide so as to maintain a stable lean combustion condition, since reduction in nitrogen oxide included in combustion exhaust gas in the premixture combustor of a gas turbine and the like is required keenly. CONSTITUTION:Premixture air-fuel concentration of a mixing chamber 8 is detected, and the exhaust hole 34 of a local fuel leading-in mechanism is provided on the auxiliary chamber 4 side outlet end of the mixing chamber 8. The amount of local fuel supplied from the exhaust hole 34 is adjusted moderately, and thereby, pre-mixture air fuel concentration of the outlet of the mixing chamber 8 is concentrated in a local part. It is thus possible to maintain a stable combustion condition even if secondary premixture air is in a lean side. As a result, it is possible to suppress forming of nitrogen oxide in combustion exhaust gas, and to widen a pre-mixture combustion range toward fuel concentration lean side especially.

25. 发明专利

JPH0586902A COMBUSTION EQUIPMENT AND OPERATION THEREOF 失效
公开(公告)号：JPH0586902A
公开(公告)日：1993-04-06
申请号：JP24168091
申请日：1991-09-20
申请人： HITACHI LTD
发明人： MORITOMO YOSHIKAZU , IKEDA HIROSHI , IIZUKA NOBUYUKI , SASADA TETSUO , IWAI KAZUMI , INOUE HIROSHI , TAKABA MINORU
IPC分类号： F02C3/28 , F02C7/232 , F23R3/28
摘要： PURPOSE:To provide the above combustion equipment which does not cause fire damage to a nozzle or pipe even when a pressure difference occurs between combustion cans, in a gas/oil double burning combustion equipment for gas- turbine engine. CONSTITUTION:A purge gas jet device 10 is installed wherein when at the time of starting, oil fuel 5a is supplied to a starting nozzle 11 through a path of same 6 with low-calory gas 5b not supplied to a path of same 8, purge gas is introduced from a hole 10a penetrating through the wall of the low-calory gas path into the same path and is jetted out at high velocity from an operation nozzle 12. The device has a purge gas flow control means 10b and a tank of same 10c.

26. 发明专利

JPH04371718A COOLING STRUCTURE FOR GAS TURBINE BURNER 失效
公开(公告)号：JPH04371718A
公开(公告)日：1992-12-24
申请号：JP14839791
申请日：1991-06-20
申请人： HITACHI LTD
发明人： INOUE HIROSHI , HAYASHI NORIYUKI , TSUKAHARA SATOSHI , IWAI KAZUMI
IPC分类号： F23R3/08
摘要： PURPOSE:To provide a cooling structure of a gas turbine burner which is capable of exerting the maximum performances of forced convection cooling by cooling air flowing in an air flow passage inside a structural member which forms a burner and forced convection cooling by air to be supplied in the burner without increasing pressure loss in the burner and maintaining the performance of film cooling as well. CONSTITUTION:Cooling operations are carried out, which comprise forced convection cooling of air 101 to be supplied into a burner and forced convection cooling of cooling air 101 flowing in an air flow passage 2 installed inside a structural member 1 which forms the burner and further film cooling where film cooling air 105 flows along the burner in a smooth and filmy manner on the side of combustion gas 102. The structural member 1 is designed to be thick only in the portion where the air flow passage 2 is provided and thin in the intermediate part.

27. 发明专利

JPH04126921A PREMIX-TYPE GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH04126921A
公开(公告)日：1992-04-27
申请号：JP24752090
申请日：1990-09-19
申请人： HITACHI LTD
发明人： YOKOTA OSAMU , ISHIBASHI YOJI , AKATSU YASUAKI , OMORI TAKASHI , INOUE HIROSHI
IPC分类号： F23R3/12 , F23R3/28 , F23R3/30
摘要： PURPOSE:To make uniform the flow velocity of a premix and the distribution of fuel concentration at a swirler outlet in a premix combustion part, by forming swirler vanes disposed in a swirler of the premix combustion part in the shape of fins, in a multi-nozzle type two-stage combustor. CONSTITUTION:In diffusion combustion 1 in a multi-nozzle type two-stage combustor, a primary fuel ejected from a primary fuel nozzle 3 and primary air 4 are mixed with each other by diffusion, and a flame is formed in a region where the fuel concentration is within a combustible concentration range from a low to a high concentration. In a premix combustion 2, a secondary fuel ejected from a secondary fuel nozzle 5 and secondary air 6 are premixed with each other in a swirler 7, to form a flame at an outlet of the swirler 7. Fin- shaped swirler vanes 8 provided in the swirler 7 in a premix combustion part cause the secondary fuel and the secondary air 6 flowing on the fins to generate swirls at upstream and downstream ends of the fins, thereby accelerating the mixing. It is thereby possible to make uniform the flow velocity of the premix and the distribution of fuel concentration at the swirler outlet, within a short distance and without causing any pressure loss in the premix blowing through the swirler.

28. 发明专利

JPH0490403A FLAME HOLDER 失效
公开(公告)号：JPH0490403A
公开(公告)日：1992-03-24
申请号：JP20501390
申请日：1990-08-03
申请人： HITACHI LTD
发明人： INOUE HIROSHI , YOKOTA OSAMU , KOBAYASHI SHIGEYOSHI
IPC分类号： F23D11/24
摘要： PURPOSE:To obtain a compact gas turbine combustion apparatus so as to induce a vortex flow having an axis in the direction of a main flow by changing the position of the direction of a suddenly expanding main flow continuously or by stages in the direction parallel with a wall surface while being crossed at a right angle with the main flow. CONSTITUTION:Main fuel F is injected into a premixing chamber 9 from a main fuel nozzle 8 mounted on a concentric circle to a pilot burner and changed into an unburnt pre-mixture, and flows into a combustion chamber 11. The pre-mixture forms a pre-mixed flame 6, the central side of which is ignited and stabilized by a pilot burner and the outer circumferential side of which by the circulating flow of a suddenly expanding section 1, at that time. Since the suddenly expanding section 1 is formed in a notched-shaped recessed section 2, the sectional shape of the pre-mixed flame 6 is formed in a planar shape, and the pre-mixed flame is shortened, and combustion is completed in front of a diluted air hole 12. Accordingly, a gas turbine combustion apparatus can be miniaturized.

29. 发明专利

JPH0412625A METHOD AND APPARATUS FOR DETERMINING INTERCHANGE OF LOAD IN DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH0412625A
公开(公告)日：1992-01-17
申请号：JP11255190
申请日：1990-04-27
申请人： HITACHI LTD
发明人： IMAMURA YUZURU , INAGAKI KEIZO , KUDO HIROYUKI , HIRANO RYUZO , INOUE HIROSHI , KAWAKAMI JUNZO
IPC分类号： H02J3/00
摘要： PURPOSE:To shorten a processing time, by deriving an evaluation point on the basis of the supply densities of feeders and the supply distances associated with nodes, regarding the combination of the feeders and the nodes, each having the shortest route for transferring a load, and by determining the feeder having the highest evaluation point as a supply feeder. CONSTITUTION:A shortest route for transferring a load and a next shortest route for transferring a load are searched on each of nodes, the nodes being objects for which the loads are interchanged, and searched every attendant one of feeders F1-F3. Regarding the combination of the feeders F1-F3 and the nodes #1-#9, each having the shortest route for transferring a load, an evaluation point is derived on the basis of the supply densities of the feeders F1-F3 and the supply distances associated with the nodes #1-#9. The one of the feeders F1-F3 which has the highest evaluation point is determined as a supply feeder. Therefore, while grasping the whole of interchanging loads, a collective batch processing can be performed. Thereby, the quality of the obtained configuration of interchanging loads is improved, and the processing tried again and the repeated processing are reduced.

30. 发明专利

JPH0399105A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JPH0399105A
公开(公告)日：1991-04-24
申请号：JP23281389
申请日：1989-09-11
申请人： HITACHI LTD
发明人： INOUE HIROSHI , ISHIBASHI YOJI , AKATSU SHIGEYUKI , OMORI TAKASHI , KATO FUMIO , YOKOTA OSAMU , KURODA MICHIO
IPC分类号： F23D14/24 , F23C99/00 , F23D14/70
摘要： PURPOSE:To provide a low NOx combustor of high reliability in the gas turbine combuster of premixture combustion method which has a flame stablizing enlarged flow channel section by making the flame stabilizing enlarged flow channel section non-uniform in shape in the circumferential direction. CONSTITUTION:A plurality of notches 19 are provided at an enlarged flow channel section 16 in the circumferential direction. With those notches the premixture flame that is formed at the outlet of a premixture flame that is formed at the outlet of a premixture swirler 6 is high in stability at the sections of the enlarged flow channel section 16 which have no notch because of the formation of high temperature circulation flow. On the other hand the flames are unstable, but the section on both sides in the circumferential direction where stability is high helps to form flames. As a result even if vibration develops in the section where the high temperature circulation flow is formed, it is absorbed and abated at the notch section and it is possible to reduce the pressure amplitude at the peak frequency and improve reliability.

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