JPS6045294B2 - gas turbine generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas turbine power generator, and more particularly to a ventilation cooling system for a gas turbine power generator equipped with an open air cooling type gas turbine generator.

The bearing room of a gas turbine is at high temperature (400'C).
Since it is adjacent to the exhaust gas exhaust pipe of the above), the bearings and other parts stored in this bearing room are exposed to high temperatures. Cooling air, which has been cooled to a certain extent in the gear room located between the bearing room and the bearing room, is supplied to the bearing room by a ventilation fan to cool parts such as bearings.

First, such a conventional gas turbine power generation device will be explained with reference to FIG.

Figure 1 shows a model of the ventilation passage of a gas turbine generator, in which 1 is the outer cover of the gas turbine generator, 2 is the popular part with the popular port 3, 4 is the wind barrel inside the base, and 5 is the gas turbine generator. A stator frame 6 of the turbine generator is a generator body housed within the stator frame 5, and a fan 7 is provided on the rotor thereof.

8 is an exhaust duct, 9 is an exhaust port thereof, and 10 is a gear room having a popular port 11, in which a gear box 12 is housed.

13 is a bearing room of the gas turbine, 14 is an exhaust port thereof, 15 is a bearing housed in the bearing room 13, 16 is a partition wall between the gear room and the bearing room 13, and 17 is attached to this partition wall 16. It's a ventilation fan.

The cooling air is generated by the generator fan 7 as shown by the arrow.
Enter the popular part 2 from the popular entrance 3, and from here go to the base internal wind trunk 4.
It is guided into the stator frame 5 through the cooling system, where it cools the generator main body 6, and then reaches the exhaust outlet 8, and its exhaust port 9.
is discharged outdoors.

On the other hand, the cooling air sucked into the gear room 10 from the popular port 11 by the ventilation fan 17 attached to the partition wall 16 cools the gearbox 12, and then, as shown by the arrow,
The air is blown into the bearing room 13 to further cool the bearings 15 etc. stored therein, and the exhaust port 1
From 4, it is discharged outdoors. In this way, in the conventional gas turbine power generation device, the ventilation fan 17 is attached to the partition wall 16 in order to cool the bearings 15 etc. in the bearing room 13. It is necessary to perform processing to attach the ventilation fan 17 to the ventilation fan 16, which has the disadvantage that the structure is complicated and expensive.

An object of the present invention is to eliminate the drawbacks of the prior art described above, and to use an inexpensive gas that can effectively ventilate and cool bearings in bearings and gearboxes in gear rooms, without requiring a ventilation fan, and with a simple structure. To provide turbine generators.

In order to achieve this objective, the present invention has developed a method to discharge warm water (
A portion of the cooling air (approximately 80℃) is used to ventilate and cool the high-temperature bearing room, and the cooling air after the bearing room is ventilated and cooled is used to suck out the air in the gear room. It is characterized by the following. An embodiment of the present invention will be described below with reference to FIG. 2, which shows a modeled ventilation passage of a gas turbine power generator similar to FIG. 1. In Figure 2, same as Figure 1. Codes indicate the same or equivalent. In this embodiment, the conventional ventilation fan is omitted, and instead, a ventilation vibrator 18 for guiding a part of the cooling air after cooling the generator main body 6 to the bearing room 13 is installed in the exhaust duct. 8. Exhaust port 9
It is provided extending from a little closer to the bottom of the partition wall 16.

Additionally, due to the omission of the ventilation fan, in order to cool the gear room 10 through ventilation, the popular port 11, which was conventionally provided above the gear room 10, has been moved downward, and now faces the exhaust port 14 of the bearing groom 13 above. An exhaust port 19 is provided at the bottom portion. The rest of the structure is the same as the conventional example shown in FIG. In the gas turbine power generation device configured in this way, the generator main body 6 is cooled and the exhaust duct 8
A part of the cooling air that has reached the bearing room 13 is guided below the bearing room 13 through the ventilation vibrator 18, circulates inside the room 13 while cooling it, and is discharged outdoors from the upper exhaust port 14.

On the other hand, an exhaust port 19 of the gear room 10 is provided at a position facing the exhaust port 14 of the bearing room 13, and the cooling air discharged from the exhaust port 14 causes the gear room to
Since the air in the gear room 10 is sucked out, new cooling air is sucked into the gear room 10 from the lower popular port 11, cools the inside of the gear room 10, and is then discharged from the exhaust port 19 and from the bearing room 13. is discharged outdoors along with the cooling air. Therefore, the bearing room 13 and the gear room 10 can be cooled by ventilation without providing a ventilation fan, and the partition wall 16 between them can be simply made by drilling a hole, inserting the ventilation vibrator 18 into the hole, and welding the partition wall 16 therebetween. This makes the structure extremely simple.

As explained above, according to the present invention, a portion of the warm cooling air after cooling the gas turbine generator, which was conventionally discharged outdoors, is effectively used to cool the inside of the high-temperature bearing room. In addition to ventilation cooling, the air in the gear room is sucked out using the cooling air after the bearing room is ventilated, so the bearings in the bearing room and the gearbox in the gear room are effectively ventilated. In addition, the conventionally used ventilation fan can be omitted, and the structure of the partition wall that supports the ventilation fan is simplified, making it possible to manufacture this type of gas turbine power generator at low cost. It becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a modeled ventilation path of a conventional gas turbine power generation device, and FIG. 2 is a schematic configuration diagram showing a modeled ventilation path of a gas turbine power generation device according to an embodiment of the present invention. It is a diagram. 1... Outer cover of gas turbine generator, 8...
...Exhaust duct, 10...Gear room, 11.
... Popularity, 12 ... Gigibox, 1
3...Gas turbine bearing room, 14
...the exhaust port, 15...the bearing,
18... Ventilation vibe, 19... Gear room exhaust port.

Claims (1)

[Claims] 1. A gas turbine having a bearing room that houses a bearing that is cooled by ventilation, a gas turbine generator that is directly connected to this gas turbine and is cooled by ventilation, and a gas turbine that is located between these gas turbines and the gas turbine generator and that is A gear room having an inlet that houses a gear box to be cooled, wherein a ventilation passage is provided to guide a part of the cooling air that cools the gas turbine generator to the bearing room, and an exhaust port of the bearing room is provided. An exhaust port for the gear room is provided nearby, and air in the gear room is sucked out by cooling air discharged from the exhaust port of the bearing room, and new cooling air is sucked into the gear room from the air inlet to cool the gear box. A gas turbine power generation device characterized by: