JP3813845B2 - Gas turbine equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas turbine device in which a heat exchanger in which a heat exchange core is housed is attached to a housing having a double pipe.
[0002]
[Background Art and Problems to be Solved by the Invention]
The present applicant has previously proposed a gas turbine device in which a heat exchanger for exchanging heat between the exhaust of the gas turbine and the compressed air exiting the compressor of the gas turbine is connected to the exhaust outlet of the gas turbine. (Japanese Patent Application No. 2000-206646). In this apparatus, low-temperature compressed air introduced into the heat exchanger and high-temperature compressed air passages derived from the heat exchanger are respectively connected to the outside and inside of the double pipe connected to the front end of the heat exchanger casing. Provided. However, in this case, it is not easy to connect the double pipe and the heat exchanger casing in a sufficiently sealed state. In particular, it becomes difficult to seal the inner tube side of the double pipe.
[0003]
Accordingly, an object of the present invention is to provide a gas turbine device in which the heat exchanger casing and the housing having a double pipe are connected in a sealed state using a simple method.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a gas turbine apparatus according to the present invention has a compressor, a combustor, and a turbine, and a compressed air from the compressor and an exhaust gas from the turbine at a rear end portion of a housing that houses these. a gas turbine apparatus heat exchanger is attached to the heat exchange between the heat for accommodating a core for heat exchange to the first fluid of the low-temperature by heat exchange with the exhaust gas and the second fluid hot A low-temperature passage having an exchanger casing, the housing and an inner cylinder provided radially inward thereof, and allowing the first fluid to flow toward the core in the heat exchanger casing across the inner cylinder on the outside of the inner cylinder, and a double tube in which the high-temperature passage is formed respectively on the inside of the inner tube to derive the second fluid from the core, the heat exchanger casing and the housing, provided in the housing Hauge Through a casing flange which is provided on the heat exchanger casing and Gufuranji are connected. The casing flange, introduction hole for introducing a first fluid to the core is formed with a plurality of side by side in the circumferential direction via the ribs in communication with the cold passage between the housing and the inner tube, in said low-temperature passage, wherein A plurality of struts for connecting the housing and the inner cylinder are formed at circumferential positions corresponding to the ribs, and the casing flange and the housing flange are formed by fastening members attached at positions corresponding to the radially outer sides of the ribs. And are concluded.
[0005]
According to the gas turbine apparatus, the casing flange of the heat exchanger casing and the housing flange of the housing are fastened by the fastening member attached at a position corresponding to the radially outer side of the rib and the strut. The heat exchanger casing and the housing can be connected in a state where the housing serving as the outer cylinder forming the low-temperature passage of the double pipe and the heat exchanger casing are sufficiently sealed. In addition, the inner cylinder that forms the high-temperature passage of the double pipe thermally expands more than the housing that forms the outer cylinder by the internal high-temperature compressed air, so that the heat exchanger casing contacts the A high sealing performance is obtained between the exchanger casing.
[0006]
In a preferred embodiment of the present invention, the strut has a curved shape or a tapered shape with a smooth leading edge.
[0007]
According to the said structure, the flow resistance of the strut in a low temperature channel | path becomes small, and a 1st fluid flows into the heat exchanger side smoothly through a low temperature channel | path.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a gas turbine apparatus according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the gas turbine device 1 includes a gas turbine engine 2, a heat exchanger 8 connected to the rear portion thereof, and a generator 3 driven by the gas turbine engine 2.
[0009]
The gas turbine engine 2 includes a centrifugal compressor 4, a turbine 5, and an annular combustor 6 positioned in the radial direction of the turbine 5. A turbine rotor 17 is joined to the back surface of the impeller 11 of the compressor 4. The compressor 4 compresses the air IA introduced from the intake passage 7 and passes the compressed air A1 to the combustor 6 via the heat exchanger 8 connected to the exhaust gas outlet side at the rear of the gas turbine engine 2. It is supplied and driven by the turbine 5. The compressor 4 includes an impeller 11 and a shroud 12 formed at a position covering the impeller 11 at the rear end of the intake housing 9 constituting the intake passage 7. A diffuser 13 for increasing the static pressure of the compressed air A <b> 1 is disposed on the radially outer side that is the outlet side of the compressor 4.
[0010]
The heat exchanger 8 performs heat exchange between the high-temperature exhaust gas E that has exited the turbine 5 of the gas turbine engine 2 and the low-temperature compressed air A1 that has exited the compressor 4 of the gas turbine engine 2. The compressor 4, the combustor 6, and the turbine 5 are attached to a rear end portion of a housing 35 having a circular cross section. In this heat exchanger 8, a casing flange 38 provided at a front end portion of a heat exchanger casing 37 having a circular cross section is fastened to a housing flange 39 at a rear end portion of the housing 35 by a fastening member 105. A heat exchanging core 36 is accommodated inside the vessel casing 37.
[0011]
The housing 35 has a circular cross section, and has an outer cylinder 47 formed by itself and an inner cylinder 48 provided radially inward thereof, and is disposed between the outer cylinder 47 and the inner cylinder 48 from the compressor 4. A low-temperature passage 35 a that flows the low-temperature fluid A 1 that is the first fluid toward the core 36 is formed, and a high-temperature passage 35 b is formed inside the inner cylinder 48. The heat exchanging core 36 has a circular cross section or a polygon having a quadrangle or more, and a space between the heat exchanger casing 37 and the core 36 is provided between the heat exchanger casing 37 and the inner cylinder 48. A low temperature passage 46 connected to the low temperature passage 35a is formed. The core 36 has a compressed air passage 41 through which a low-temperature compressed air A1 introduced from a low-temperature passage 46 flows and an exhaust gas passage 42 through which a high-temperature exhaust gas E flows in parallel at a predetermined interval by a plurality of flat plates. It is partitioned. High temperature passage 35b compressed air A2 of high temperature derived from the heat exchange core 36 is Ru flow is continuous to the combustor 6. A conical member 53 that connects the outside of the front end of the core 36 and the exhaust diffuser 52 that extracts the exhaust gas E from the turbine 5 is disposed inside the inner cylinder 48 in the radial direction, and the inner cylinder 48 and the exhaust diffuser are arranged. 52 and the conical member 53 form a high-temperature passage 35b.
[0012]
The combustor 6 has a fuel nozzle 32 that injects a gas or liquid fuel F into the combustion chamber 31, and the fuel F is supplied to the combustion chamber 31 through the heat exchanger 8. It is mixed and burned. The high-temperature and high-pressure combustion gas G is sent to the turbine 5, and the turbine 5 is driven by the energy of the combustion gas G, and the compressor 4 and the generator 3 are driven by the turbine 5.
[0013]
The generator 3 includes a generator rotor 61 connected to the rotating portion 21 of the gas turbine engine 2 and a generator stator 62 disposed around the generator rotor 61, and the intake housing 9 is disposed inside the intake housing 9. It is concentrically arranged and accommodated in a generator case 64 having a circular cross section supported by the intake housing 9 via a strut 63. The space formed between the intake housing 9 and the generator case 64 constitutes the intake passage 7.
[0014]
As shown in FIG. 2, a flange 39 at the rear end of the housing 35 and a flange 38 at the front end of the heat exchanger casing 37 are abutted with each other via a gasket 40 (optional), and a screw hole 106 formed in the flange 38. In addition, the housing 35 and the heat exchanger casing 37 are connected by screwing a bolt 105, which is an example of a fastening member, through a screw insertion hole 107 formed in the flange 39. A plurality of bolts 105 are attached in the circumferential direction.
[0015]
As shown in FIG. 3, the double pipe is formed with a low-temperature passage 35 a on the outside and a high-temperature air passage 35 b on the inside with the inner cylinder 48 interposed therebetween, and the housing 35 and the inner cylinder 48 serving as the outer cylinder 47, Are connected by a plurality of struts 102 at equal intervals in the circumferential direction.
[0016]
As shown in FIG. 4, the strut 102 has a curved shape with a smooth leading edge 102a. As shown in FIG. 5, the flange 38 of the heat exchanger casing 37 is provided with a plurality of introduction holes 46 at equal intervals in the circumferential direction that connect the low temperature passage 35 a and the low temperature passage 43 on the heat exchanger side. Adjacent introduction holes 46 are partitioned by ribs 101. The rib 101, the strut 102, and the screw hole 106 are arranged at the same position in the circumferential direction. The inner cylinder 48 forming the high-temperature passage 35b of the double pipe shown in FIG. 2 is formed integrally with the outer cylinder 47 and the strut 102, and the end surface 48a of the inner cylinder 48 is processed in the same plane as the end surface of the flange 39. The bolt 105 is fastened to the heat exchanger flange 38.
[0017]
In the above configuration, heat is exchanged between the compressed air A1 exiting the compressor 4 of the gas turbine engine 2 and the exhaust gas E exiting the turbine 5 by the heat exchanger 8 of FIG. The compressed air A2 is guided to the combustor 6 of the gas turbine engine 2 through the high temperature passage 35b. Here, the flange 38 of the heat exchanger casing 37 and the flange 39 of the housing 35 in FIG. 2 are attached by a fastening member 105 attached to a position corresponding to the radially outer side of the rib 101 and the strut 102, that is, a position having high strength. Since it is fastened, the fastening force can be set large. Since the outer cylinder 47 and the inner cylinder 48 are integrally formed and are made of the same material, the inner cylinder 48 has a lower temperature compressed air A1 and a higher temperature compressed than the outer cylinder 47 that is in contact with the outside air and the low temperature compressed air A1 during operation. Since it is in contact with the air A2, the temperature becomes high, and a larger surface adhering force is obtained with respect to the flange 38 due to thermal elongation, and a large sealing performance can be expected. In particular, in the region of the intermediate portion 48b corresponding to the space between the adjacent struts 102 and 102 in the inner cylinder 48 of FIG. Further, since the connecting portion 48c connected to the strut 102 in the inner cylinder 48 is arranged at a position corresponding to the bolt 105 with the strut 102, the fastening force is directly transmitted through the strut 102, and the surface contact force of this portion is also increased. The sealing effect is large.
[0018]
【The invention's effect】
As described above, according to the gas turbine device of the present invention, the introduction hole that communicates with the low-temperature passage and introduces the first fluid into the core in the casing flange of the heat exchanger casing extends in the circumferential direction via the rib. A plurality of struts formed side by side, and a plurality of struts that connect the housing and the inner cylinder to the housing are formed at circumferential positions corresponding to the ribs, and are attached at positions corresponding to the radially outer sides of the ribs the members, because with the casing flange and the housing flange of the housing is fastened, and the heat exchanger casing and the housings are in a simple structure of fastening by simply fastening member, linked state between the two is sealed Is done.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a gas turbine apparatus according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a fastening portion of a housing and a heat exchanger casing of the gas turbine apparatus.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view showing a main part of a housing of the gas turbine apparatus.
FIG. 5 is a perspective view showing a main part of a heat exchanger casing of the gas turbine apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Gas turbine apparatus, 2 ... Gas turbine engine, 4 ... Centrifugal compressor, 5 ... Turbine, 6 ... Combustor, 8 ... Heat exchanger, 35 ... Housing, 35a ... Low temperature passage, 35b ... High temperature passage, 36 ... Heat Replacement core, 37 ... heat exchanger casing, 38 ... flange of heat exchanger casing, 39 ... flange of housing, 46 ... introduction hole, 48 ... inner cylinder, 101 ... rib, 102 ... strut, 105 ... fastening member, IA ... Air, A1 ... Low-temperature compressed air, A2 ... High-temperature compressed air, E ... Exhaust gas.

Claims (2)

A gas turbine having a compressor, a combustor, and a turbine, and having a heat exchanger for exchanging heat between the compressed air from the compressor and the exhaust gas from the turbine at a rear end portion of a housing housing these A device,
A heat exchanger casing for accommodating the core for heat exchange to the first fluid of the low-temperature by heat exchange with the exhaust gas and the second fluid hot,
A low-temperature passage having the housing and an inner cylinder provided radially inward thereof and flowing a first fluid toward the core in the heat exchanger casing across the inner cylinder is disposed outside the inner cylinder A high-temperature passage for leading the second fluid from the core, and a double pipe formed inside each of the inner cylinders ,
The housing and the heat exchanger casing, is connected via a casing flange which is provided with a housing flange provided on the housing to the heat exchanger casing,
In the casing flange, a plurality of introduction holes that are communicated with a low-temperature passage between the housing and the inner cylinder and introduce the first fluid into the core are formed side by side in the circumferential direction via ribs,
In the low temperature passage, a plurality of struts connecting the housing and the inner cylinder are formed at circumferential positions corresponding to the ribs,
A gas turbine device in which the casing flange and the housing flange are fastened by a fastening member attached at a position corresponding to the radially outward side of the rib.   2. The gas turbine device according to claim 1, wherein the strut has a curved shape or a tapered shape with a smooth leading edge.

Images