JP5545195B2 - Gas turbine power generator - Google Patents

Description

  The present invention relates to a gas turbine power generator.

  Conventionally, there is known a gas turbine power generator including a silencer for reducing high-frequency noise from an intake / exhaust system, and a sound absorbing material and a sound insulating material for reducing direct radiated sound from a power generator main body. . For example, Patent Document 1 described below describes a gas turbine power generation device including a silencer connected to an exhaust pipe.

  FIG. 2 is a diagram illustrating an example of a conventional gas turbine power generator. As shown in FIG. 2, a conventional gas turbine power generator 90 includes a generator 92, a gas turbine engine 93, an exhaust pipe 94, a silencer 95, a sound insulating material 96, an ejector 97, and an expansion pipe 98. , Including. The silencer 95 is provided in the exhaust pipe 94 in order to reduce high frequency noise from the exhaust. The sound insulating material 96 has a predetermined thickness and heat resistance, and is provided so as to surround the gas turbine engine 93 in order to reduce direct radiated sound from the outer wall of the gas turbine engine 93. The ejector 97 and the expansion pipe 98 are provided in the exhaust pipe 94 in order to reduce the temperature of the exhaust gas discharged from the gas turbine engine 93.

JP 2002-4881 A

  Here, in the gas turbine power generation device described in Patent Document 1 and the gas turbine power generation device 90 shown in FIG. 2, since the silencer, the sound absorbing material, and the sound insulating material occupy a large space, the gas turbine power generation device can be downsized. And it was difficult to reduce the weight. In particular, in the gas turbine power generation device 90 shown in FIG. 2, it is difficult to reduce the size and weight of the gas turbine power generation device because the ejector and the expansion pipe occupy a large space.

  Therefore, the present invention has been made to solve such problems, and an object of the present invention is to provide a gas turbine power generator that can be reduced in size and weight.

  In order to solve the above-described problems, a gas turbine power generator according to the present invention includes a generator that generates electric power, an engine that drives the generator, and an exhaust gas passage that leads exhaust gas discharged from the engine to the outside. The exhaust gas flow path includes a first bent portion that turns the exhaust gas flow path in the engine direction, and a first bent portion that turns the exhaust gas flow path folded in the engine direction by the first bent portion in a direction away from the engine. And 2 bent portions.

  According to the present invention, it is possible to reduce high-frequency noise due to exhaust by turning back the exhaust gas flow path a plurality of times by the first bent portion and the second bent portion. For this reason, it is possible to reduce the necessity of providing a silencer in the exhaust system, and it is possible to reduce the size and weight of the gas turbine power generator.

The gas turbine power generating apparatus according to the present invention, an intake passage for introducing the intake of outside air into the engine, further comprising a fuel storage section for storing the fuel, and the intake passage, first folding the intake line 3 has a bent portion, the fuel storage portion, that is arranged to surround the outer periphery of the intake passage.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to shield and reduce the high frequency sound by the intake of a gas turbine power generator, and the radiation sound from an engine with the fuel storage part and the fuel stored in the fuel storage part. As a result, the sound insulation material of the gas turbine power generator can be reduced, and the gas turbine power generator can be further reduced in size and weight. In addition, since the high-frequency noise due to the intake air can be reduced by folding the intake air flow path with the third bent portion, it is possible to reduce the necessity of providing a silencer in the intake system, and further reduce the size of the gas turbine power generator and Weight reduction is possible.

  In the gas turbine power generator according to the present invention, it is preferable that an ejector portion is formed in the exhaust gas passage. According to this, it is not necessary to provide an ejector separately, and space saving can be achieved. As a result, the gas turbine power generator can be further reduced in size and weight.

  In the gas turbine power generator according to the present invention, it is preferable that the exhaust gas flow path is configured using the outer surface of the engine. Thus, by forming the exhaust gas passage using the outer surface of the engine, it is possible to reduce the members for the exhaust gas passage. As a result, the gas turbine power generator can be further reduced in size and weight.

  At this time, it is preferable that a plurality of protrusions be provided on the outer surface of the engine constituting the exhaust gas passage. According to this, exhaust heat can be recovered from the exhaust gas to the engine, and the temperature of the exhaust gas can be reduced.

  In the gas turbine power generator according to the present invention, it is preferable that the intake flow path is configured using the outer surface of the generator. According to this, the outside air is supplied to the engine through the intake passage configured using the outer surface of the generator. For this reason, it is possible to cool the generator without providing a dedicated cooling device. As a result, the need for a cooling device such as a fan dedicated to the generator can be reduced, and the gas turbine power generation device can be further reduced in size and weight.

  According to the present invention, the gas turbine power generator can be reduced in size and weight.

It is an end view along the central axis of the gas turbine power generator concerning one embodiment of the present invention. It is an end elevation along the central axis of the conventional gas turbine power generator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic end view along the central axis of the gas turbine power generator of this embodiment. The gas turbine power generation device is a power generation device that is mounted on a vehicle such as an automobile and the generator is driven by a gas turbine engine. As shown in FIG. 1, the gas turbine power generator 1 of the present embodiment has a substantially columnar outer shape having a central axis I, and includes a generator 2, an engine 3, an intake passage 4, and an exhaust gas passage. 5, a fuel tank 6 (fuel accumulation unit), an auxiliary unit 7, and a ventilation flow path 8.

  The generator 2 is a device that is driven by the engine 3 to generate electric power. The generator 2 is arranged with its rotational axis coaxial with the central axis I. The engine 3 is a gas turbine engine and is a device that drives the generator 2. The engine 3 is disposed adjacent to one side of the generator 2 in the direction of the central axis I (right side in the figure: hereinafter, simply referred to as “one side”) with the rotational axis of the engine 3 being coaxial with the central axis I. Further, the rotating shaft of the engine 3 is integrated so as to be continuous with the rotating shaft of the generator 2. The engine 3 includes an intake port 31, a compressor 32, a spark plug 33, a combustion unit 34, a turbine 35, and an exhaust port 36, and these are accommodated in an engine housing 37.

  The intake port 31 is a portion for introducing air into the engine 3, and is provided on the other side of the engine 3 in the direction of the central axis I (the left side in the drawing: hereinafter, simply referred to as “the other side”). The exhaust port 36 is a part that exhausts exhaust gas from the inside of the engine 3, and is provided on one side of the engine 3. The compressor 32 is a rotary blade that supplies air introduced from the intake port 31 to the combustion unit 34 as high-pressure air. The compressor 32 is provided on the other side of the rotation shaft of the engine 3. The turbine 35 is a rotary blade that is rotationally driven by the high-temperature and high-pressure combustion gas generated by combustion in the combustion unit 34 and discharges the combustion gas as an exhaust gas from the exhaust port 36. The turbine 35 is provided on one side of the rotation shaft of the engine 3.

  The combustion unit 34 is a region where high-pressure air supplied from the compressor 32 and fuel injected from a fuel nozzle (not shown) are mixed and burned. The combustion unit 34 extends on one side of the engine 3 so as to surround the outer periphery of the exhaust port 36. The spark plug 33 is a device for igniting the fuel injected in the combustion unit 34, and is provided, for example, from one side of the gas turbine power generator 1 to the combustion unit 34.

  The engine housing 37 includes an inner peripheral plate 371, a tip plate 372, and an outer peripheral plate 373. The inner peripheral plate 371 is a tubular plate member extending in the direction of the central axis I, and is disposed so that the other side covers the exhaust port 36. The outer peripheral plate 373 is a tubular plate member extending in the direction of the central axis I, and is disposed on the outer side of the inner peripheral plate 371 so that the combustion unit 34 is located between the inner peripheral plate 371 and the outer peripheral plate 371. The tip plate 372 is an annular plate member that extends along the central axis I and has a U-shaped section that is convex on one side. The distal end plate 372 has an inner peripheral edge connected to one side of the inner peripheral plate 371 and an outer peripheral edge connected to one side of the outer peripheral plate 373.

  The intake passage 4 is a portion that introduces outside air that exists outside the gas turbine power generator 1 into the intake port 31 of the engine 3 as intake air. The intake flow path 4 is formed by an outside air introduction part 41, a partition wall 42, an intake outer wall 43, an auxiliary machine part housing 72 described later, and an outer surface of the generator 2.

  The outside air introduction portion 41 is an opening provided on the side surface of the gas turbine power generation device 1, for example, and is a portion that introduces outside air into the gas turbine power generation device 1. The partition wall 42 is a substantially cylindrical member extending in the direction of the central axis I, and is disposed so as to surround the intake port 31 of the generator 2 and the engine 3. The peripheral edge of one end of the partition wall 42 is attached to the engine housing 37. The other end of the partition wall 42 is bent so as to extend inward.

  The intake outer wall 43 is a substantially cylindrical member extending in the direction of the central axis I, and is disposed so as to surround all or part of the partition wall 42. An end portion on one side of the intake outer wall 43 is bent so as to extend outward, thereby forming an outside air introduction portion 41. In addition, the fuel tank 6 can be fitted to the outer periphery of the intake outer wall 43. The peripheral edge of the other end of the intake outer wall 43 is joined to an accessory housing 72 described later, and is closed by the accessory housing 72.

  The intake passage 4 formed in this way includes an intake passage 4a, an intake passage 4b, an intake passage 4c (third bent portion), and an intake passage 4d. ing. The intake flow path 4a is formed by the outside air introduction portion 41 and extends from the outside toward the inside of the gas turbine power generator 1. The intake passage 4b is formed between the outer peripheral surface of the partition wall 42 and the inner peripheral surface of the intake outer wall 43, and extends toward the other side. The intake passage 4 c is formed between the accessory housing 72 and the partition wall 42 and extends toward the inside of the partition wall 42. The intake passage 4 d is formed between the outer surface of the generator 2 and the inner peripheral surface of the partition wall 42 and extends to the intake port 31 of the engine 3. That is, the intake passage 4 is disposed so as to surround the generator 2 and the intake port 31 of the engine 3 in the gas turbine power generator 1.

  The exhaust gas flow path 5 is a part for leading the exhaust gas discharged from the engine 3 to the outside of the gas turbine power generator 1. The exhaust gas passage 5 is formed by the engine housing 37, the bent wall 52, the bent plate 54, and the exhaust outer wall 55.

  The bent wall 52 is formed in a substantially bottomed cylindrical shape extending in the direction of the central axis I and closed on one side, and is provided to cover the combustion part 34 of the engine 3. The bent wall 52 has a bottom portion 521 that forms a bottom surface and a side surface portion 522 that forms a side surface. A central portion of the bottom portion 521 protrudes toward the other side so as to face the turbine 35.

  The bent plate 54 is an annular plate member having a U-shaped cross section that is convex on the other side and extending around the central axis I. The bent plate 54 is attached to the outer peripheral plate 373 of the engine housing 37 so as to cover the other end portion of the side surface portion 522 of the bent wall 52.

  The exhaust outer wall 55 is formed in a substantially cylindrical shape extending in the direction of the central axis I, and is disposed so as to surround the bent plate 54 and the bent wall 52. A peripheral edge of the other end of the exhaust outer wall 55 is connected to a communication wall 81 described later. One end of the exhaust outer wall 55 has a duct 5 g that protrudes to one side of the bottom 521 of the bent wall 52. The duct 5g is configured to bend inward of the exhaust outer wall 55 as it proceeds in the protruding direction.

  The inner peripheral surface of the exhaust outer wall 55 is formed so as to be smoothly reduced in diameter as it advances to one side around the bent plate 54. And it is formed so that it may increase in diameter smoothly from the outer periphery of the bending plate 54 to the one side on the periphery of the bottom 521 of the bending wall 52.

  In the exhaust gas passage 5 formed in this way, the exhaust gas passage 5a, the exhaust gas passage 5b (first bent portion), the exhaust gas passage 5c, and the exhaust gas passage 5d (first) 2 bent portions), an exhaust gas passage 5e, and an exhaust gas passage 5f. The exhaust gas passage 5a is formed by the inner peripheral plate 371 of the engine housing 37 and extends toward one side. The exhaust gas flow path 5b is formed between the bottom 521 of the bent wall 52 and the tip plate 372 of the engine housing 37, and extends outward from one side with respect to the central axis I, and the other side (engine direction, ie, engine direction). (Direction toward 3).

  The exhaust gas passage 5c is formed between the outer peripheral plate 373 of the engine housing 37 and the inner peripheral surface of the side surface portion 522 of the bent wall 52, and extends toward the other side. The exhaust gas flow path 5d is formed between the distal end portion of the side surface portion 522 of the bent wall 52 and the bent plate 54, extends outward from the other side with respect to the central axis I, and is on one side (the direction away from the engine 3). ). The exhaust gas passage 5e is formed between the inner peripheral surface of the exhaust outer wall 55 and the outer peripheral surface of the side surface portion 522 of the bent wall 52, and extends toward one side. The exhaust gas flow path 5f is formed by one end of the exhaust outer wall 55 and extends to the outside.

  The fuel tank 6 is a container that accumulates fuel such as gasoline. The fuel tank 6 has a ring-shaped (annular) outer shape, and is fitted on the outer periphery of the intake outer wall 43. The auxiliary machine part 7 includes an auxiliary machine 71 and an auxiliary machine housing 72 that covers the auxiliary machine 71. The auxiliary machinery 71 is a peripheral device necessary for operating the engine 3 and includes, for example, a fuel pump and a lubricating oil pump. The accessory housing 72 is joined to the other end of the intake outer wall 43 so as to close the intake outer wall 43.

  The ventilation channel 8 is a part that supplies the low-temperature outside air introduced from the outside air introduction unit 41 along the intake channel 4 a to the exhaust gas channel 5. The ventilation channel 8 is formed by the connecting wall 81 and the bent plate 54. The connecting wall 81 is a substantially cylindrical member extending in the direction of the central axis I, and connects the outside air introduction portion 41 and the other end portion of the exhaust outer wall 55.

  Further, the exhaust gas passage 5 of the present embodiment includes an ejector 57 (ejector portion) in the passage. The ejector 57 is formed, for example, by making the gap between the bent plate 54 and the outer peripheral portion of the side surface portion 522 of the bent wall 52 narrower on the downstream side than on the upstream side of the exhaust gas passage 5. The ejector 57 generates a negative pressure by using the exhaust gas ejection from the exhaust gas flow path 5d to the exhaust gas flow path 5e, and cools the low-temperature outside air introduced from the outside air introduction unit 41 via the ventilation flow path 8. To the exhaust gas passage 5e. As a result, the temperature of the exhaust gas can be lowered.

  Next, the flow of outside air introduced into the gas turbine power generator 1 will be described.

  The outside air is first introduced along the intake flow path 4a through the outside air introduction portion 41, and then is divided by the partition wall 42 while the inflow direction is changed to one side and the other side. The outside air whose inflow direction is changed to one side flows along the ventilation channel 8 and flows into the exhaust gas (details will be described later). The outside air whose inflow direction has been changed to the other side flows along the intake flow path 4b, and the inflow direction is changed to the inner side of the partition wall 42 by the accessory housing 72, and the partition wall 42 along the intake flow path 4c. Supplied inside. The outside air is supplied to the intake port 31 of the engine 3 through the intake passage 4d.

  Next, the flow of exhaust gas discharged from the engine 3 of the gas turbine power generator 1 will be described.

  The exhaust gas is discharged from the turbine 35 to one side through the exhaust port 36 and flows along the exhaust gas flow path 5a. The exhaust gas is changed in the discharge direction toward the outer periphery of the engine 3 by the central portion of the bottom portion 521 of the bent wall 52 and flows outward along the exhaust gas passage 5b. Then, the exhaust gas is folded back to the other side by the bottom portion 521 and the side surface portion 522 of the bent wall 52. The exhaust gas folded back to the other side flows along the exhaust gas flow path 5c, then flows along the exhaust gas flow path 5d, and is folded back from the other side to the one side by the bent plate 54.

  Next, the exhaust gas passes through the ejector 57 and is ejected to the exhaust gas passage 5e. When a negative pressure is generated by the ejection of the exhaust gas, the low-temperature outside air that has flowed in along the intake flow path 4a is discharged to the exhaust gas flow path 5e through the ventilation flow path 8. As a result, the exhaust gas is diluted with the outside air, and the temperature of the exhaust gas can be lowered.

  The diluted exhaust gas flows to one side along the exhaust gas passage 5e, and is then discharged to the outside of the gas turbine power generator 1 along the exhaust gas passage 5f. As a result, the exhaust gas is slit and discharged to the outside. As a result, the exhaust gas diffuses and the contact area with the atmosphere increases.

  Next, the effect of the gas turbine power generator 1 of this embodiment is demonstrated. The gas turbine power generator 1 is provided with the intake passage 4 to obtain the following effects.

  By bending the intake flow path 4 at a plurality of locations, high-frequency noise due to intake air can be reduced. For this reason, the necessity for providing a silencer in the intake system can be reduced, and the gas turbine power generator 1 can be reduced in size and weight.

  The outside air introduced from the outside air introduction portion 41 is supplied to the intake port 31 of the engine 3 through the intake passage 4d formed between the outer peripheral portion of the generator 2 and the inner peripheral portion of the partition wall 42. Thus, the generator 2 can be cooled without providing a dedicated cooling device such as a fan. For this reason, the necessity for the cooling device only for the generator 2 can be reduced, and the gas turbine power generator 1 can be reduced in size and weight. Moreover, the noise reduction effect by the fin of the generator 2 is also acquired.

  The fuel tank 6 is disposed on the outer peripheral surface of the intake outer wall 43, and the auxiliary unit 7 is joined to the other end of the intake outer wall 43. By arranging in this way, the intake flow path 4 is provided between the fuel tank 6 and the auxiliary unit 7, the engine 3 and the exhaust gas flow path 5. Thereby, the fuel tank 6 and the auxiliary machine part 7 can be isolated from the high temperature parts such as the engine 3 and the exhaust gas passage 5. As a result, it is possible to reduce the necessity of a dedicated heat insulating material for the fuel tank 6 and the auxiliary machine part 7 and to reduce the size and weight of the gas turbine power generator 1.

  Further, the fuel tank 6 is formed in a ring shape and is disposed on the outer peripheral portion of the intake outer wall 43. Therefore, the fuel tank 6 and the fuel accumulated in the fuel tank 6 can shield and reduce high-frequency sound caused by intake of the gas turbine power generation device 1 and radiation sound from the engine. As a result, the sound insulating material of the gas turbine power generation device 1 can be reduced, and the gas turbine power generation device 1 can be reduced in size and weight. That is, the fuel tank 6 can be used as a sound insulating material.

  Moreover, the gas turbine power generator 1 is provided with the exhaust gas flow path 5 to obtain the following operational effects.

  By bending the exhaust gas flow path 5 at a plurality of locations, high-frequency noise due to exhaust can be reduced. For this reason, the necessity to provide a silencer in the exhaust system can be reduced, and the gas turbine power generator 1 can be reduced in size and weight. Moreover, the contact area with air | atmosphere can be increased by making exhaust_gas | exhaustion slit shape. For this reason, thermal diffusion of exhaust gas can be promoted, and thermal damage can be suppressed. In addition, it is not always necessary to provide the duct 5g at the exhaust outlet that is an outlet for exhausting the exhaust gas to the outside of the gas turbine power generation device 1. Instead, for example, a louver or a similar member is provided to diffuse the exhaust gas. May be promoted, or another exhaust duct may be provided and extended.

  By forming the ejector 57 in the exhaust gas flow path 5, it is possible to reduce the necessity of separately providing an ejector, and to obtain a space-saving and efficient ejector effect. As a result, the gas turbine power generator 1 can be reduced in size and weight.

  The exhaust gas flow path 5a is formed using the inner peripheral plate 371 of the engine housing 37, and the exhaust gas flow path 5b is formed between the bottom plate 521 of the bent wall 52 using the tip plate 372 of the engine housing 37, and the engine By forming the exhaust gas passage 5c between the side wall 522 of the bent wall 52 using the outer peripheral plate 373 of the housing 37, the members for the exhaust gas passage 5 can be reduced. As a result, the gas turbine power generator 1 can be reduced in size and weight.

  Furthermore, in the gas turbine power generation device 1, the engine 3 is disposed on the innermost circumference of the intake flow path 4 and the exhaust gas flow path 5, so that the radiated sound from the engine 3 is emitted by the intake flow path 4 and the exhaust gas flow path 5. Can be reduced. As a result, the sound insulating material dedicated to the engine 3 can be reduced, and the gas turbine power generator 1 can be reduced in size and weight.

  As described above, according to the gas turbine power generation device 1 of the present embodiment, the high-frequency sound from the intake and exhaust of the engine 3, the high-frequency sound from the engine 3 main body, and the exhaust heat damage are reduced. It can be realized at once with a lightweight package.

  The above-described embodiment describes the best embodiment of the gas turbine power generator according to the present invention, and the gas turbine power generator according to the present invention is not limited to that described in the present embodiment. The gas turbine power generator according to the present invention may be modified from the gas turbine power generator 1 according to the embodiment or applied to other ones without changing the gist described in each claim.

  For example, the intake flow path 4 and the exhaust gas flow path 5 of the gas turbine power generation device 1 in the above embodiment may be combined as appropriate with the necessary configurations among the configurations that can achieve the above-described effects.

  Further, the engine housing 37 forming the exhaust gas passages 5a to 5c may have a plurality of protrusions (folds) on a part of the outer surface thereof. According to this, exhaust heat recovery from exhaust gas can be performed. For this reason, thermal efficiency can be improved, the temperature of exhaust gas can be reduced, and thermal damage can be further suppressed.

  Further, the other end portion of the partition wall 42 only needs to be formed so that the outside air introduced from the outside air introduction portion 41 can flow into the inside of the partition wall 42 and is bent so as to extend inward. It is not limited.

DESCRIPTION OF SYMBOLS 1 ... Gas turbine power generator, 2 ... Generator, 3 ... Engine, 4 ... Intake flow path, 4c ... Intake flow path (3rd bending part), 5 ... Exhaust gas flow path, 5b ... Exhaust gas flow path (1st Bending part), 5d ... exhaust gas flow path (second bending part), 6 ... fuel tank (fuel accumulating part), 37 ... engine housing (outer surface of engine), 57 ... ejector (ejector part)

Claims (5)

A generator for generating electric power;
An engine that drives the generator;
An intake passage for introducing outside air into the engine as intake air;
An exhaust gas passage for leading exhaust gas discharged from the engine to the outside;
A fuel storage unit for storing fuel;
With
The exhaust gas flow path is folded back in a direction away from the engine by a first bent portion that turns the exhaust gas flow path in the engine direction, and the exhaust gas flow passage that is turned in the engine direction by the first bent portion. a second bent portion, was closed,
The intake passage has a third bent portion that folds the intake passage,
The gas turbine power generation device , wherein the fuel accumulation unit is disposed so as to surround an outer periphery of the intake passage . The gas turbine power generator according to claim 1 , wherein an ejector portion is formed in the exhaust gas passage. The exhaust gas passage, the gas turbine power generating apparatus according to claim 1 or 2 is constructed by utilizing the outer surface of the engine. The gas turbine power generator according to claim 3 , wherein a plurality of protrusions are provided on an outer surface of the engine constituting the exhaust gas passage. The gas turbine power generator according to any one of claims 1 to 4 , wherein the intake flow path is configured using an outer surface of the generator.

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