Abstract: A combustor of a gas turbine, which is composed of an inner tube and a transition pipe connected together, comprising: an internal swirler composed of a cylindrical inward swirler ring disposed concentrically with respect to a central axis of the inner tube, and a plurality of inward swirler vanes provided on an outer peripheral surface of the inward swirler ring; and an external swirler composed of a cylindrical outward swirler ring disposed on an outer peripheral side of the inward swirler vanes and concentrically with respect to the inward swirler ring, and a plurality of outward swirler vanes provided on an outer peripheral surface of the outward swirler ring, the internal swirler and the external swirler being disposed within the inner tube.

Abstract: A gas turbine combustor includes a combustion liner in which a combustion region is formed; and a housing provided for a wall of the combustion liner in a predetermined circumferential region of the combustion liner to form a resonance space between the combustion liner and the housing. The combustion region and the resonance space are connected by a plurality of combustion liner through-holes, and a circumferential length of the housing is longer than a diameter of the combustion liner.

Abstract: A gas turbine combustor includes a combustion liner in which a combustion region is formed; and a housing provided for a wall of the combustion liner in a predetermined circumferential region of the combustion liner to form a resonance space between the combustion liner and the housing. The combustion region and the resonance space are connected by a plurality of combustion liner through-holes, and a circumferential length of the housing is longer than a diameter of the combustion liner.

Abstract: A motor board 44 of a capstan motor, which is made of a metallic material offering good heat dissipation is provided in a tape running apparatus 1 in such a way as to face a circuit board 6 thereof. A motor drive IC 43, into which drive circuits for driving and controlling a capstan motor 4, a drum motor 2 and a loading motor 3 is incorporated, are mounted on this motor board 44. The circuit board 6 and the motor board are connected to each other by an inter-board connector 7. Further, electrical connection between the circuit board 6 and each of the motors 2, 3, and 4 is established through the motor board 44.

Abstract: A pilot nozzle of a gas turbine combustor comprises a first structure, provided near a main nozzle of a combustor that injects fuel oil, having a flow channel for a fuel gas and an outlet for the fuel gas. The first structure diffusion-injecting the fuel gas obliquely forward through the outlet to maintain a flame and to aid ignition of the fuel oil injected from the main nozzle. There is further provided a second structure which circulates in whirls a combustion gas generated due to the combustion of the fuel gas.

Abstract: A combustor includes a burner and a combustion chamber including a heat chamber to which fuel is supplied from the burner. The burner includes a nozzle having a fuel discharge outlet from which the fuel is discharged into the combustion chamber; and the nozzle includes a plurality of discharge openings around the fuel discharge outlet from which cooling water is discharged toward inside surfaces of the heat chamber. The plurality of discharge openings may be disposed so that the directions of the cooling water discharged from the discharge openings differ in the radial direction.

Abstract: A pulse width modulated brushless electric motor employs a conductive metal screw or similar connector to create a common potential between the stator core and the iron substrate on which the motor drive circuit is mounted. By approximately setting the common potential to, for example, the base line of the power source and motor drive circuit, the noise electromagnetically generated by the pulse width modulation is suppressed.

Abstract: A pilot nozzle of a gas turbine combustor comprises a first structure, provided near a main nozzle of a combustor that injects fuel oil, having a flow channel for a fuel gas and an outlet for the fuel gas. The first structure diffusion-injecting the fuel gas obliquely forward through the outlet to maintain a flame and to aid ignition of the fuel oil injected from the main nozzle. There is further provided a second structure which circulates in whirls a combustion gas generated due to the combustion of the fuel gas.

Abstract: A motor board 44 of a capstan motor, which is made of a metallic material offering good heat dissipation is provided in a tape running apparatus 1 in such a way as to face a circuit board 6 thereof. A motor drive IC 43, into which drive circuits for driving and controlling a capstan motor 4, a drum motor 2 and a loading motor 3 is incorporated, are mounted on this motor board 44. The circuit board 6 and the motor board are connected to each other by an inter-board connector 7. Further, electrical connection between the circuit board 6 and each of the motors 2, 3, and 4 is established through the motor board 44.

Abstract: A combustor includes a burner and a combustion chamber including a heat chamber to which fuel is supplied from the burner. The burner includes a nozzle having a fuel discharge outlet from which the fuel is discharged into the combustion chamber; and the nozzle includes a plurality of discharge openings around the fuel discharge outlet from which cooling water is discharged toward inside surfaces of the heat chamber. The plurality of discharge openings may be disposed so that the directions of the cooling water discharged from the discharge openings differ in the radial direction.

Abstract: A direct PWM brushless motor has a motor main body mounted on a metal substrate and a motor drive circuit formed on a circuit substrate that is separated from the metal substrate. The motor drive circuit includes switching elements that are directly turned on and off, in which a switching pulse width for the switching elements is modulated to control current conducting through drive coils. The direct PWM brushless motor has a wiring cable connection device for connecting the motor main body and a fixed potential of the motor drive circuit, and a conduction device that conductively connects a metal plate portion of the metal substrate to the wiring cable connection device.

Abstract: Liquid fuel purge device uses water, not compressed air as in the prior art, thereby prevented are rapid load change of gas turbine due to sudden discharge of liquid fuel and coking of remaining liquid fuel. Upon supply of liquid fuel to fuel nozzle (05) being stopped, water purge system (15) having stop valve (16) supplies water into fuel system including liquid fuel system (08) and fuel nozzle (05) and liquid fuel remaining therein is purged by water into combustion chamber (013) from the fuel nozzle (05).

Abstract: In gas turbine combustor in which combustion air flows on outer periphery of cylinder body and turns to enter the cylinder body while being mixed with fuel in main burner to form pre-mixture, there is provided upstream of the main burner 101 in the combustor 103 a rectifier 106 or 108 for rectifying the combustion air so as to make flow velocity of the combustion air uniform, thereby shortcomings in the prior art of concentration non-uniformity of the pre-mixture of main fuel and combustion air, high concentration of NO.sub.x generated from the main burner 101 in combustion, etc. are eliminated and larger combustion range to maintain stable combustion is attained.

Abstract: In a starter combustor of a pressurized fluidized bed combined cycle power system, disorder of a flame detecting device due to ash accumulation is prevented. A fuel nozzle (33) of the starter combustor is provided so as to be directed to an inner cylinder (32) and a pipe (38) of a fitting pipe (36), which is connected to the inner cylinder (32). A valve body (1), having a valve body passage (1a), is provided so as to be connected to one end of the fitting pipe (36) and a valve component (3). The valve component (3) has a recess portion 3a and is connected to a shaft (1a) . When the combustor is started, the shaft (2), which is engaged rotatably with shaft fitting portion (3a') of the valve component (3) and is in threaded engagement with a threaded portion of the valve body (1), is moved by handle (4) so that the valve component is moved and the passage (1a) is opened. While the combustor is stopped, the passage (1a) is closed by the valve component (3).

Abstract: A gas turbine plant having a compressor, gas turbine, and combustor, comprising a cooling system adapted to cool the wall of the combustor by means of air compressed by the combustor when the load of the gas turbine and/or the combustion load of the combustor is low, and an additional cooling system adapted to cool the wall of the combustor by means of a cooling medium different from the air in addition to the cooling by means of the air when the load of the gas turbine is increased.

Abstract: A combustor has a pilot nozzle 02 arranged at a central portion of an inner cylinder 01 opening at its end into a combustion chamber 018 and includes a plurality of main nozzles 03 arranged around its outer circumference. Along the outer circumference of a flame holding cone 014 for igniting a fuel F injected from the main nozzles 03 there are disposed elliptical extension pipes 016 of an elliptical sectional shape which are extended from the fronts of the main nozzles 03 to have openings at the axial position of the opening of the flame holding cone 014. As a result, a hot premixed flame 013 does not flow back to a main swirler zone 015 of the circumferential edges of the openings of the main nozzles 03 so that mixing between the fuel F and an air flow A can be improved, reducing the Nox emission while eliminating the burning of a base plate 04 and the main nozzles 03.

Abstract: A cleaning method for a flame detector of a gas turbine activating combustor, comprising branching control air for forcing a spark plug of an ignition system into the gas turbine activating combustor, and blowing the branched control air against the respective inner surfaces of light sensor glasses of a flame detector, thereby blowing off dust or soot from the glass.

Abstract: A multi-nozzle combustor comprising a pilot nozzle for flame retention and a plurality of main nozzles arranged around the pilot nozzle, each of the nozzles including an outer cylinder, an inner cylinder, and an annular passage defined between the outer and inner cylinders and forming therein a mixture-evaporation region for a fuel ejected and atomized by an airflow.

Abstract: A combustor inner tube 102 or a burner 101 provided on the upstream side of a tail pipe 103 having a straight or substantially straight axis is disposed at an angle with respect to the axis of tail pipe 103, by which a secondary flow is produced in combustion gas. Thereby, low-temperature gas at the outer peripheral portion is mixed with high-temperature gas at the central portion so that the gas temperature distribution is made uniform.

Abstract: In a tail pipe of gas turbine combustor, the portion just in front of the outlet 104 of tail pipe of gas turbine combustor has a shape such as to be inclined with respect to the axial direction so that the direction changes from the rearward direction to the direction toward the rear in the substantially axial direction, and at this portion, the position of center of curvature 103 in the axial direction on the rotor side lies on the upstream side from the position of center of curvature 102 on the casing side, a bent portion of tail pipe serves as a suction duct, and the occurrence of a negative pressure zone is prevented. Also, by using the tail pipe, a combustor inner tube or a burner provided on the upstream side of the tail pipe having a straight or substantially straight axis is disposed so that the axis of the combustion inner tube or the burner makes an angle with respect to the axis of the tail pipe in such a manner that combustion gas collides with the back side of the tail pipe.