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71. 发明专利

JP2001296025A GAS TURBINE COMBUSTOR 失效
公开(公告)号：JP2001296025A
公开(公告)日：2001-10-26
申请号：JP2000111556
申请日：2000-04-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIDA KOICHI , TANAKA KATSUNORI , BANDAI SHIGEMI
IPC分类号： F23R3/18 , F23R3/32 , F23R3/34
摘要： PROBLEM TO BE SOLVED: To provide a gas turbine combustor to prevent the occurrence of a back fire during high load operation and during a fluctuation of a load and be capable of achieving stable combustion. SOLUTION: A gas turbine combustor comprises a cone 4 situated approximately at the central part of a combustor inner cylinder 2 and forming a diffusion flame through reaction of pilot fuel and combustion air to each other; and a plurality of premixture flame forming nozzles 6 situated in a division state at the periphery of the cone 4 and the generation and jetting premixture gas of main fuel and combustion air. A back flow preventing board 7 with a number of small holes 7a closes gaps between the peripheral edge part of the jet of the premixture flame forming nozzle 6, the peripheral edge part of the jet of the cone 4, and the peripheral edge part of the opening of the combustor inner cylinder 2.

72. 发明专利

JP2001164945A SHAFT STRUCTURE AND BEARING STRUCTURE OF TAIL END PORTION OF ROTOR OF GAS TURBINE 失效
公开(公告)号：JP2001164945A
公开(公告)日：2001-06-19
申请号：JP2000292763
申请日：2000-09-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： OYA TAKEAKI , HIROKAWA KAZUHARU , TANIOKA TADATERU , SHINOHARA TANEHIRO , TANAKA KATSUNORI , UEMATSU KAZUO
IPC分类号： F02C7/18
摘要： PROBLEM TO BE SOLVED: To provide a shaft structure and a bearing structure of a tail end portion of a rotor, in which a shaft portion of a rotor assembly is not deformed caused by heat. SOLUTION: In the shaft structure at the tail end portion of the rotor, a vapor passage is disposed along a center axis of the rotor assembly of a gas turbine to supply/collect vapor for cooling a moving blade of the gas turbine. The shaft structure is characterized in that: a center hole of the tail end portion of the rotor co-axial with the center axis of the vapor passage is disposed in the tail end portion; a thermal sleeve is disposed between the vapor passage and a surface in the center hole of the tail end portion of the rotor; a heat insulating air layer is formed between the surface in the center hole of the tail end portion of the rotor and the thermal sleeve; and the heat insulating air layer is air-tightly and liquid-tightly insulated from the outside.

73. 发明专利

JP2001152805A STEAM-COOLING STATIONARY BLADE AND GAS TURBINE 失效
公开(公告)号：JP2001152805A
公开(公告)日：2001-06-05
申请号：JP33486999
申请日：1999-11-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO TATSUO , WATANABE YASUSHI , TANAKA KATSUNORI
IPC分类号： F01D9/02
摘要： PROBLEM TO BE SOLVED: To solve the problems where impinge cooling of a stationary blade is disturbed and cooling steam of high pressure is required for cooling the stationary blade since cross flow is large in the conventional stationary blade, and a combined plant efficiency is reduced in the stationary blade and a gas turbine provided with the stationary blade, in relation to a steam-cooling stationary blade where a bypass hole is provided to an impinge board and for directly supplying steam in a stationary blade cooling passage, and a gas turbine provided with the stationary blade. SOLUTION: This steam cooling stationary blade is provided with an outside feed cavity, where a plurality of impingement holes are drilled and for leading cooling steam for impingement cooling an outside shroud and cooling steam which directly flow into the stationary blade cooling passage, the impingement board for partitioning the cavity for ejecting, from the impingement holes, steam from the feed cavity, and a by pass hole which is directly communicated with the stationary blade cooling passage, and which is drilled on the impingement board for making steam from the feed cavity directly flow into the passage. As a result, these problems can be solved.

74. 发明专利

JP2001090939A STRUCTURE OF COMBUSTOR 失效
公开(公告)号：JP2001090939A
公开(公告)日：2001-04-03
申请号：JP26888499
申请日：1999-09-22
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIMURA MASAHARU , ONO MASAKI , ONISHI KEIZO , TANAKA KATSUNORI
IPC分类号： F23R3/42 , F23M20/00 , F23M99/00 , F23M13/00
摘要： PROBLEM TO BE SOLVED: To provide the structure of a combustor for a gas turbine, which restrains the vibration of air in an air suction wheel chamber for the combustor highly reliably at a low cost. SOLUTION: One sheet of thin flat sheet 10 is attached to the inner wall of a casing 100 by studs 1 through a gap while the thin flat sheet resonates with the vibration of air whereby the energy of the vibration of air is absorbed. The stud is constituted of a bolt 2, welded to the casing, and two pieces of nuts 3, 4, welded to the bolt after screwing them to the bolt, while the thin flat sheet is retained through two pieces of nuts. A plurality of thin flat sheets can be laminated to absorb the energy of vibration of air by friction, the size of the thin flat sheet can be changed to absorb the energy of vibration of air having various frequencies, a three-dimensional formed matter can be welded directly to the inner wall of the casing and a hole can be bored on the thin flat sheet or the three-dimensional formed matter to pass air through the hole and facilitate the generation of vibration in the thin flat sheet or the three- dimensional formed matter.

75. 发明专利

JPH11151611A CUTTING DEVICE OF CORRUGATED FIN 失效
公开(公告)号：JPH11151611A
公开(公告)日：1999-06-08
申请号：JP31790097
申请日：1997-11-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAGAYAMA MASAHITO , NAKAMURA SHINPEI , FUKUI KOJI , MURANAKA SOTOJIRO , TANAKA KATSUNORI
IPC分类号： B23D36/00
摘要： PROBLEM TO BE SOLVED: To improve the working efficiency of the conveying and cutting works of a corrugated fin, in a cutting device of corrugated fin. SOLUTION: In this cutting device of corrugated fin, a cutter holder 27 is rotated one round by a timing belt 30 when a rotary cam 20 is rotated one round by a driving motor 15, and the cutting device is moved synchronously with a corrugated fin 11 in the forward moving time of the cutter holder 27, and in this time, a cutter 29 cuts the corrugated fin 11 adequately, and the cutter 29 is returned to the original position in the backward moving time of the cutter holder 27.

76. 发明专利

JPH10259915A AIR BYPASS APPARATUS FOR GAS TURBINE 失效
公开(公告)号：JPH10259915A
公开(公告)日：1998-09-29
申请号：JP6625297
申请日：1997-03-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： BANDAI SHIGEMI , KAWABATA HITOSHI , TANAKA KATSUNORI , AKAMATSU SHINJI
IPC分类号： F02C7/18 , F23R3/26 , F23R3/42
摘要： PROBLEM TO BE SOLVED: To uniformize the temperature of the wall of a tail cylinder in a gas turbine provided with an air bypass pipe connected to a tail cylinder for guiding a high temperature combustion gas from a combustor by providing a turning means of air in the air bypass pipe to enable guiding of bypass air into an entire area containing a side wall part of the tail cylinder within it. SOLUTION: Air leaving a compressor is supplied into a combustor 102 and a high temperature combustion gas is generated to be supplied to a turbine 104 from a tail cylinder 103. When a gas turbine load is low, a part of the air leaving the compressor is supplied as bypass air to the tail cylinder 103 from an air inflow port 109 through a bypass valve 106 and a bypass elbow 105. In this case, a swirler 11O is provided on the inner circumference side of the air inflow port 109 of the tail cylinder 103. When the bypass air flows in the bypass elbow 105 through the bypass valve 106, the bypass air is turned by the swirler 110 to be supplied into the tail cylinder 103 and guided into the entire area in the tail cylinder 103 to uniformize the temperature of the wall of the tail cylinder 103 thereby restricting the generation of thermal stress.

77. 发明专利

JPH09137919A PREMIXING BURNER 失效
公开(公告)号：JPH09137919A
公开(公告)日：1997-05-27
申请号：JP29820995
申请日：1995-11-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： TANAKA KATSUNORI , BANDAI SHIGEMI
IPC分类号： F23R3/28 , F23D14/02
摘要： PROBLEM TO BE SOLVED: To stabilize combustion by a method wherein a plurality of branch pipes for jetting fuel on sections different in the direction of the axis of a fuel nozzle respectively and the branch pipes are provided with a plurality of fuel jetting ports opened in the upstream direction to uniformize the mixing of a fuel and air. SOLUTION: Two branch pipes 2 for jetting fuel are arranged on a section on the upstream side of a fuel nozzle 1 at positions separated by 180 deg. from each other and other two branches 2' are arranged on other sections on the downstream side at positions shifted by 90 deg. from the branch pipes 2 so that the same section will not be closed. Therefore, an air passage is secured sufficiently at respective sectional positions where the branch pipes 2 and 2' are set so that air resistance and air drift attributed to the branch pipes 2 and 2' are retrained. In the branch pipes 2 and 2', three each of fuel jet ports 3 are provided opened on the upstream side. The fuel jet ports 3 are arranged as opposed to an air flow while being set at positions so selected to portion the area of the air flow. This promotes the uniform mixing of the fuel supplied from the fuel jet port 3 and air.

78. 发明专利

JPH0953464A GAS TURBINE COMBUSTION EQUIPMENT 失效
公开(公告)号：JPH0953464A
公开(公告)日：1997-02-25
申请号：JP21058495
申请日：1995-08-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： INADA MITSURU , SATO NOBUO , TANAKA KATSUNORI
IPC分类号： F02C7/22 , F23R3/36
摘要： PROBLEM TO BE SOLVED: To improve the combustibility of methane which is main fuel and enable further low temperature combustion by the conventional burner so as to reduce NOx by pre-mixing gas flue formed by mixing at least one kind among propane, butane and ethane with fuel taking methane as the main component with air for fuel and burning the same. SOLUTION: Propane, butane and ethane 7 are added separately or as a mixture thereof to methane 6 which is fuel for a gas turbine and mixed by a mixer 8. The mixture is supplied to a combustor 3 and pre-mixed with a large quantity f high pressure air 1 compressed by a compressor 2. Thus, combustion gas burnt at a further lower temperature than that in the case of burning methane 6 separately is supplied to a turbine 4 and discharged as exhaust gas 5. Thus, NOx generation can be restrained without damaging combustion stability.

79. 发明专利

JPH06213452A BURNER AND OPERATING METHOD THEREFOR 失效
公开(公告)号：JPH06213452A
公开(公告)日：1994-08-02
申请号：JP2354493
申请日：1993-01-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： TANAKA KATSUNORI
IPC分类号： F23R3/28 , F23R3/30
摘要： PURPOSE:To reduce pilot fuel and to decrease NOx by supplying combustion gas of a pilot nozzle toward between two adjacent main nozzles. CONSTITUTION:Each premixing main nozzle 4 has a main swirler 7 of the same swirling direction. Thus, premixed gas 13 of the two adjacent nozzles 4 is opposed at swirling flows at an intermediate position thereof and collided with one another. As a result, mixing of fuel and the air is expedited between the adjacent nozzles 4. A fuel injection hole 12 from a pilot nozzle 3 is set to this part. In this manner, since combustion gas 11 of the nozzle 3 is supplied to the part in which the premixing is expedited, the combustion is stabilized. Thus, stable combustion is performed even if a small quantity of pilot fuel is supplied, and hence the pilot fuel can be reduced.

80. 发明专利

JPH062848A GAS TURBINE COMBUSTION APPARATUS 失效
公开(公告)号：JPH062848A
公开(公告)日：1994-01-11
申请号：JP16105092
申请日：1992-06-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： BANDAI SHIGEMI , TANAKA KATSUNORI , TANIMURA SATOSHI , NISHIDA HIROYUKI
IPC分类号： F23R3/12 , F23R3/28 , F23R3/30 , F23R3/34
摘要： PURPOSE:To obtain a sufficient NOx restraining effect in a thin-fuel premixed combustion apparatus of a gas-fuel firing gas turbine by making the fuel concentration distribution of premixed gas uniform. CONSTITUTION:Two or more hollow poles 11 each having two or more fuel nozzles 12 are integrally formed into one piece with a fuel nozzle main body 6 of a main nozzle 3 on the upstream side of a swirler 10 of the fuel nozzle main body 6, and fuel is also spouted from the fuel nozzles 12. Thereby, the fuel concentration distribution becomes uniform even when the boss ratio of the main nozzle 3 is large, and original thin-fuel premixed combustion is performed, resulting in a reduction in NOx generation rate.

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