JPH0710438U - Gas turbine ejector - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide an ejector for a gas turbine that significantly reduces the cost of the gas turbine power generator. In an ejector 31 of a gas turbine in which a diffuser is arranged around the outside of an exhaust port 21 for combustion gas, the diffuser is provided on the outer side 32 of the gas turbine main body 11.
The inner side 34 and the inner side 34 are divided into two parts, or an integral type diffuser can be adjusted in its mounting position along the flow direction of the internal fluid.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ejector for a gas turbine power generator.

[0002]

[Prior art]

 A gas turbine power generator is a gas engine that compresses gas, heats it, and expands the generated high-temperature high-pressure gas in the turbine to output power to the outside. FIG. 4 shows a schematic configuration of a general gas turbine generator.

As shown in FIG. 4, in the gas turbine power generator, a generator 12 is installed in the device body 11, and its output shaft 13 is connected to a speed reducer 15 via a shaft coupling 14. A gas turbine 16 is attached to the speed reducer 15. Further, an intake port 17 is formed in the main body 11 of the device, and the intake port 17 communicates with the generator 12 through the opening 18 to the outside and also with the gas turbine 16 through the intake pipe 19. There is. Further, an ejector 22 including a diffuser 20 attached to the main body of the apparatus and an exhaust port 21 attached to the gas turbine 16 is attached.

Therefore, in this gas turbine power generator, part V _{1 of} the outside air that has entered the main body 11 of the apparatus through the intake port 17 flows into the gas turbine 16 through the intake pipe 19 and is burned. While being used, the remaining part V ₂ flows into the generator 12 through the opening 18 to the outside and cools the generator 12, the gas turbine 16, and instrumentation (not shown). Then, the combustion gas (outside air) V ₁ is introduced from the exhaust port 21 to the diffuser 20, and the cooled outside air V ₂ is introduced to the diffuser 20 through the inside of the main body 11 of the apparatus, and both of them are discharged to the atmosphere from an exhaust duct (not shown). Is released.

[0005]

[Problems to be solved by the device]

 In the gas turbine power generator described above, the performance of the ejector 22 is determined by the shape of the diffuser 20 and the shape of the exhaust port 21, but since the target is a compressed fluid, its performance is sufficient as calculated at the design stage. Didn't get to. Therefore, conventionally, this is dealt with by changing the inner diameter of the diffuser 20. That is, a plurality of diffusers 20 having different inner diameters are prepared in advance, and the diffusers 20 are attached in order and the one having good performance is selected and used. Therefore, it takes a long time to adjust the performance of the ejector 22, which causes a cost increase of the gas turbine power generator.

The present invention solves such a problem, and an object of the present invention is to provide an ejector for a gas turbine in which the cost of the gas turbine power generator is largely reduced.

[0007]

[Means for Solving the Problems]

 The gas turbine ejector of the present invention for achieving the above-mentioned object is an ejector of a gas turbine in which a diffuser is arranged around the outside of an exhaust port of combustion gas. It is characterized in that it is divided into two parts on the side.

The gas turbine ejector of the present invention is a gas turbine ejector in which a diffuser is provided around the exhaust port of combustion gas, and the diffuser is attached along the flow direction of the internal fluid. The feature is that the position can be adjusted.

[0009]

[Action]

 In the ejector of the gas turbine, the diffuser is divided into two parts, the outer side and the inner side of the gas turbine main body, so only the parts that need to be replaced to improve the performance are required, and the ejector performance adjustment becomes short.

Further, in the ejector of the gas turbine, since the mounting position of the diffuser can be adjusted along the flow direction of the fluid inside, the work of attaching and detaching the diffuser for improving the performance is unnecessary, and the ejector performance is improved. Adjustment takes a short time.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of an essential part showing an ejector of a gas turbine according to an embodiment of the present invention, and FIG. 2 is a front view of an internal diffuser. It should be noted that the members having the same functions as those of the conventional one are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIGS. 1 and 2, in the ejector of the gas turbine power generator of the present embodiment, the diffuser is divided into two parts, the outer side and the inner side of the apparatus body. That is, in the ejector 31, the outer diffuser 32 is integrally formed with a cylindrical main body with a mounting flange, and is fixed by a fixing bolt 33 to a position matching the opening of the apparatus main body 10. On the other hand, the inner diffuser 34 is divided into two parts in the radial direction and is fitted in a cylindrical shape, and a mounting flange is integrally formed on the cylindrical main body, and the fixing bolt 35 matches the opening of the device main body 11. The exhaust port 21 of the gas turbine (not shown) is inserted therein.

Thus, the combustion gas V ₁ of the gas turbine is introduced from the exhaust port 21 to the external diffuser 32, and the cooled air V ₂ is introduced from the internal diffuser 34 to the external diffuser 32. Both are mixed and released into the atmosphere from an exhaust duct (not shown).

Then, a plurality of outer diffusers 32 and inner diffusers 34 having different inner diameters are prepared in advance, and those having good performance are selected and mounted. At this time, it is only necessary to replace the external diffuser 32 and the internal diffuser 34 that need to be replaced, so that the performance adjustment of the ejector can be completed in a short time.

FIG. 3 is a cross-sectional view showing the main parts of an ejector of a gas turbine according to another embodiment of the present invention.

As shown in FIG. 3, in the ejector of the gas turbine power generator of the present embodiment, the diffuser can adjust its mounting position along the flow direction of the fluid inside. That is, in the ejector 41, the diffuser 42 has the sliding portion 43 formed on the outer peripheral surface of the cylindrical main body. The diffuser 42 is fitted in a holding opening 44 formed in the main body 10 of the apparatus, and the sliding portion 43 is slidable. The diffuser 42 is fixed to the holding opening 44 by a plurality of fixing bolts 45. It can be fixed in any desired position.

Thus, the combustion gas V ₁ of the gas turbine is guided from the exhaust port 21 to the diffuser 42, and the cooled air V ₂ is directly guided to the diffuser 42, and both are mixed to the atmosphere from an exhaust duct (not shown). Is released to.

When adjusting the performance of the ejector, the fixing bolt 45 is loosened to move the diffuser 42 in the axial direction to adjust the position, and the fixing bolt is tightened at the desired position. It suffices to fix the diffuser 42, which makes it possible to adjust the performance of the ejector in a short time.

[0020]

[Effect of device]

 As described above in detail with reference to the embodiments, according to the ejector of the gas turbine of the present invention, the diffuser is divided into two parts, that is, the outer side and the inner side of the gas turbine body. Only the parts that need to be replaced need to be replaced, and the ejector performance adjustment can be done in a short time.

Further, according to the ejector of the gas turbine of the present invention, since the mounting position of the diffuser can be adjusted along the flow direction of the internal fluid, the work of attaching and detaching the diffuser for improving the performance is unnecessary. , Ejector performance adjustment becomes short. As a result, the cost of the gas turbine power generator can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an ejector of a gas turbine according to an embodiment of the present invention.

FIG. 2 is a front view of an internal diffuser.

FIG. 3 is a cross-sectional view showing a main part of an ejector of a gas turbine according to another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a general gas turbine generator.

[Explanation of symbols]

 11 Device Main Body 12 Generator 16 Gas Turbine 21 Exhaust Port 31 Ejector 32 External Diffuser 34 Internal Diffuser 41 Ejector 42 Diffuser 43 Sliding Part 44 Holding Opening 45 Fixing Bolt

Continuation of front page (72) Creator Shinichi Manaki 2-1-1 Osaki, Shinagawa-ku, Tokyo Stock Company, Meiden Denshi

Claims (2)

[Scope of utility model registration request] 1. An ejector for a gas turbine in which a diffuser is arranged around an outer periphery of an exhaust port for combustion gas, wherein the diffuser is divided into two parts, an outer side and an inner side of a gas turbine body. Turbine ejector. 2. An ejector of a gas turbine in which a diffuser is arranged around the outer periphery of an exhaust port for combustion gas, wherein the mounting position of the diffuser can be adjusted along the flow direction of the internal fluid. A gas turbine ejector.