JP4159945B2 - Power generation equipment - Google Patents

Description

  The present invention relates to an air start mechanism for a packaged internal combustion engine in which an internal combustion engine body and a generator are installed in a package.

  FIG. 4 is a schematic system diagram of an air start mechanism 200 of a conventional packaged internal combustion engine. The air start mechanism 200 compresses the air in the air tank 97 with the compressor 98, and starts the internal combustion engine 91 by sending this compressed air to the starter 93 via the pressure reducing valve 89 and the electromagnetic valve 88 of the start valve unit 96, The generator 92 is driven.

  The internal combustion engine 91 and the generator 92 are accommodated in the package 90, and the start valve unit 96 is installed at a location away from the package 90. The wiring 85 for supplying electric power to the electromagnetic valve 88 in the start valve unit 96 is provided with a buried portion 87 on the way to the power source 86, thereby avoiding an obstacle.

  If the wiring 85 is not buried in the ground and the entire section is exposed and arranged on the ground surface, it becomes a great obstacle when the generator 92 is operated, so the burying work cannot be omitted. It was a factor of spending extra time and costs when building power generation facilities.

  Further, the larger the internal combustion engine 90 is, the longer it takes to start up. However, in the event of an emergency, there is a law that must be activated within 40 seconds. In order to comply with this law, it is necessary to use a pressure reducing valve 89 that can be activated in 40 seconds.

By the way, in the air start type internal combustion engine, the starting time is uniquely determined for only one type of pressure reducing valve 89. In normal time, there is no restriction of “40 seconds” as described above. For example, there is no problem even if it is started over 2 to 3 minutes. By starting up in this way, it is possible to reduce the load on the gear and to extend the life of the gearbox.
JP 2001-193462 A

  Therefore, an object of the present invention is to provide a power generation facility that does not need to embed electric wiring for supplying power to the start valve unit and can further change the start time.

In order to solve the above-described problems, in the invention of claim 1, an air start mechanism, a main body of an internal combustion engine activated by the air start mechanism, a generator driven by the internal combustion engine, a board containing electrical components, The air start mechanism includes an air supply unit, a starter, a pipe for supplying compressed air from the air supply unit to the starter, and a valve disposed on the pipe. And only the main body of the internal combustion engine, the generator , the panel, the starter, the device that requires power supply among the valves, and a part of the piping are accommodated in the package. In addition, power is supplied to the equipment that needs to be supplied with power through the electrical wiring from the panel .

According to a second aspect of the present invention , there is provided a power generation facility comprising an air start mechanism, a main body of an internal combustion engine activated by the air start mechanism, a generator driven by the internal combustion engine, and a panel housing electrical components. The air start mechanism includes an air supply unit, a starter, a pipe for supplying compressed air from the air supply unit to the starter, and an activation valve unit disposed along the pipe. Only the main body of the internal combustion engine, the generator, the panel, the starter, the start valve unit, and a part of the piping are housed in a package,
Electric power is supplied to the equipment that is provided in the start valve unit and that requires electric power supply, through the electrical wiring from the panel .

The invention according to claim 3, characterized in that in the invention of claim 2, a pressure reducing valve of the activation valve unit, between the pilot valve provided on the downstream side of the pressure reducing valve, provided with the air metering means, the air conditioner The starting time of the internal combustion engine can be adjusted by the quantity means.

  In the invention of claim 4, in the invention of claim 3, an electric air metering valve is installed as the air metering means.

According to the first aspect of the present invention, since the device to be supplied with electric power in the air starting mechanism is installed in the same package together with the internal combustion engine or the like, the power source used by other electrical components in the package is used as the air starting mechanism. also the power supply equipment requiring the inner can be used, as in the prior art construction of burying the electrical wiring for supplying power to the equipment required power supply in the air starting mechanism in the ground is not required, The time and cost required for system construction can be greatly reduced. Since the electrical equipment is concentrated in the package, maintenance is easier than before.

  In the invention of claim 2, since the entire starting valve unit is installed in the package, the layout of the entire power generation facility can be simplified. Further, by accommodating the start valve unit in the package, the service life (life) is extended as compared with the conventional outdoor type exposed to rainwater.

  According to the invention of claim 3, in addition to the effects of claims 1 and 2, by providing an air metering means between the pressure reducing valve of the starting valve unit and the pilot valve provided downstream of the pressure reducing valve, the internal combustion engine The startup time of the engine can be made variable, and the startup time can be changed according to the startup environment (emergency or normal). Therefore, the burden placed on the gear of the internal combustion engine can be reduced, and the durability of the internal combustion engine can be improved.

  In the invention of claim 4, since the electric air metering valve is used as the air metering means in claim 3, the wiring and piping can be simplified. Not only the type of startup time but also the startup time can be set to an arbitrary length. Therefore, a preferable starting time can be easily set according to the rated output value of the internal combustion engine.

  FIG. 1 is a schematic system diagram of an air start mechanism 100 of a packaged internal combustion engine in which the invention of claim 1 is implemented. The air start mechanism 100 includes an air supply unit 25 constituted by the compressor 8 and the air tank 7, and an activation valve unit 17. The internal combustion engine 2 is started by compressing the air in the air tank 7 by the compressor 8 to generate compressed air, and sending the compressed air to the starter 4 via the pressure reducing valve 12 and the electromagnetic valve 16 of the start valve unit 17. The generator 3 is driven.

  As shown in FIG. 1, the internal combustion engine 2, the generator 3, and the start valve unit 17 are accommodated in the package 1. In the package 1, a board 5 that further accommodates electrical components (not shown) is disposed. Electric power is supplied to the electrical components in the panel 5 from an external power source (not shown) through the electrical wiring 19. The electrical wiring 19 is disposed inside the protective piping 26.

  As shown in FIG. 1, the start valve unit 17 installed in the package 1 includes a pressure reducing valve 12, specifically an air metering mechanism 20, a pilot valve 9, and an electromagnetic valve 16, which will be described later, arranged on a pipe 21 in this order. Has been configured.

  The start valve unit 17 is connected to an air tank 7 that stores compressed air pressurized by the compressor 8 via a pipe 21. Therefore, the compressed air in the air tank 7 can be supplied to the starter 4 via the start valve unit 17. Further, part of the electric power supplied into the panel 5 by the electric wiring 19 is supplied to the pilot valve 9 and the electromagnetic valve 16 through the electric wiring 22.

  FIG. 2 is a system schematic diagram of the start valve unit 17. The compressed air supplied from the air tank 7 is filtered by the Y-type strainer 10, the pressure is measured by the pressure gauge 11, and the pressure is reduced by the pressure reducing valve 12 to a predetermined pressure.

  As shown in FIG. 2, the air metering mechanism 20 is provided with a three-way valve 14. The three-way valve 14 branches the compressed air passage into a normal line 23 that is used in a normal state equipped with a pressure reducing valve 15 and an emergency line 24 that is used in an emergency, and can be switched. In the event that the three-way valve 14 fails, the compressed air can be released through the branch pipe 22 provided with the safety valve 13.

  When compressed air is supplied to the starter 4 via the emergency line 24, the internal combustion engine 1 (FIG. 1) starts in 40 seconds (starting time determined by law). In addition, when compressed air is supplied to the starter 4 via the service line 23, the time required for starting is longer than that when passing through the emergency line 24 because the pressure is reduced by the pressure reducing valve 15, and the burden on the gear of the drive system is reduced. can do.

  Which of the normal line 23 and the emergency line 24 is used may be switched by manually operating the three-way valve 14 depending on the presence or absence of an alarm signal, or may be programmed in advance so as to be switchable. .

  FIG. 3 is a system schematic diagram of an activation valve unit 17a different from FIG. The configuration of the start valve unit 17a is different from the configuration of the start valve unit 17 of FIG. 2 only in that an electric air metering valve 18 is provided instead of the air metering mechanism 20, and all other configurations are started. It is the same as the valve unit 17a. The electric air metering valve 18 also uses the power source in the panel 5.

  Since the electric air metering valve 18 can arbitrarily change the throttle amount, it is not necessary to provide two systems of the service line 23 and the emergency line 24 unlike the air metering mechanism 20 shown in FIG. The installation space is small, which is advantageous when installing in a limited-sized package 1 (FIG. 1).

  In the internal combustion engine 2 (especially gas turbine), unburned gas may have accumulated in the chimney, etc. At the start, first set the rotation speed to about 20% of the rating and send only air without ignition. And scavenging. In the air start type, since the rotation speed of 20% cannot be maintained, generally, scavenging is not performed, or scavenging is performed by repeatedly opening and closing the electromagnetic valve.

  However, when the electric air metering valve 18 is used, the rotation speed can be kept constant, and therefore, it is possible to easily scavenge.

  Depending on the size of the package 1 shown in FIG. 1, not all of the start valve units 17 can be accommodated. When the layout is strict, only the devices (pilot valve 9 and electromagnetic valve 16) that need to be supplied with power may be left in the housing 1, and other devices may be arranged outside the housing 1.

  In this way, it is not necessary to increase the size of the package 1 in order to accommodate the start valve unit 17, and the electromagnetic valve 16 can use the power source in the panel 5, and the labor of wiring is the conventional air. Compared to the starting mechanism 200, the number of steps is reduced.

  The present invention can be applied to an air start type and a package built-in type internal combustion engine.

2 is a system schematic diagram of an air start mechanism of a packaged internal combustion engine implementing the invention of claim 1; It is a system schematic diagram of a starting valve unit. It is the system | schematic diagram of the starting valve unit different from FIG. 1 is a system schematic diagram of an air start mechanism of a conventional packaged internal combustion engine.

Explanation of symbols

1 Package 2 Internal combustion engine (gas turbine)
3 Generator 4 Starter 5 Panel 7 with built-in power supply Air tank 8 Compressor 9 Pilot valve 12 Pressure reducing valve 14 Three-way valve 15 Pressure reducing valve 16 Solenoid valve 17, 17 a Start valve unit 18 Electric air metering valve (air metering means)
19 Electrical wiring 20 Air metering mechanism (air metering means)
21 Pipe 22 Electrical wiring 23 Service line 24 Emergency line 25 Air supply unit 100 Air starting mechanism

Claims (4)

In a power generation facility comprising an air start mechanism, a main body of an internal combustion engine activated by the air start mechanism, a generator driven by the internal combustion engine, and a panel containing electrical components ,
The air start mechanism includes an air supply unit, a starter, a pipe for supplying compressed air from the air supply unit to the starter, and a valve disposed on the pipe.
Only the main body of the internal combustion engine, the generator , the panel, the starter, a device that requires power supply among the valves, and a part of the piping are housed in a package,
A power generation facility characterized in that power is supplied to the equipment requiring power supply via an electrical wiring from the panel . In a power generation facility comprising an air start mechanism, a main body of an internal combustion engine activated by the air start mechanism, a generator driven by the internal combustion engine, and a panel containing electrical components,
The air start mechanism includes an air supply unit, a starter, a pipe for supplying compressed air from the air supply unit to the starter, and a start valve unit arranged along the pipe.
Only the main body of the internal combustion engine, the generator, the panel, the starter, the start valve unit, and a part of the piping are housed in a package,
A power generation facility characterized in that power is supplied to the device that is provided in the start valve unit and that requires power supply via electrical wiring from the panel . A pressure reducing valve of the activation valve unit, between the pilot valve provided on the downstream side of the pressure reducing valve, said air metering means is provided, and the adjustable start-up time of the internal combustion engine by said air metering unit according Item 3. The power generation facility according to Item 2 .   The power generation equipment according to claim 3, wherein an electric air metering valve is installed as the air metering means.

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