JP2831301B2 - Output shaft type gas turbine drive pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output shaft standing type gas turbine drive pump for driving a centrifugal pump, a mixed flow pump, an axial flow pump and the like by a gas turbine.

[0002]

2. Description of the Related Art Conventionally, pumps such as centrifugal pumps, mixed flow pumps, axial flow pumps, and screw pumps have been widely used in water and sewage systems, nuclear power plants, thermal power plants, steelworks, chemical plants, and the like. As the prime mover, a diesel engine or a gas turbine is used. When using this gas turbine, cooling water is unnecessary,
The use of lubricating oil is extremely small, and there are advantages such as rapid response to sudden changes in load.

[0003]

In a gas turbine, a compressor for compressing air flowing from an intake port and pressurized air whose pressure is increased by the compressor are guided to supply a liquid or gaseous fuel supplied from a fuel nozzle. A combustion chamber that obtains high-temperature, high-pressure gas by combustion, a gas generator consisting of a compressor driving turbine that drives a compressor using high-temperature, high-pressure gas generated in the combustion chamber, and an output shaft driven by high-temperature, high-pressure gas And the output turbines are arranged linearly. In addition, since a gas turbine is a high-speed rotation type prime mover, a speed reduction device is required when driving a low-speed rotation load, and when the output shaft and the driven shaft of the driven device are different in direction, a bevel gear speed reduction device is required. Is essential. Therefore, there is a problem that the arrangement of the gas turbine and the device to be driven is restricted, and there is a problem that the installation area of the device becomes large.

When the gas turbine and the pump drive shaft are connected via a bevel gear reducer, the gas turbine and the bevel gear reducer are located on the same installation surface. The axial thrust received through the gas turbine acts on the installation reference plane where the gas turbine is installed, and it is necessary to secure unnecessary strength to the civil engineering structure as the installation reference plane for the gas turbine. There was a problem that the construction cost was high.

[0005] The present invention solves the above-mentioned problems, and connects an output shaft of a gas turbine and a drive shaft of a pump without passing through a bevel gear reducer to reduce the installation area. It is an object of the present invention to provide an output shaft type gas turbine drive pump capable of reducing a load on a structural member forming an installation reference plane and reducing costs associated with installation of a gas turbine.

[0006]

In order to solve the above-mentioned problems, an output shaft type gas turbine drive pump according to the present invention uses a gas turbine as a prime mover mounted on a base, and the gas turbine serves as a prime mover. A pump for rotating a pump drive shaft arranged perpendicular to the pump, wherein a gas generator of the gas turbine is provided so that an axle thereof is parallel to a reference surface of a base, and an output turbine of the gas turbine is a pump having an axle thereof. A gas that is provided so as to be concentric with or parallel to the drive shaft, connects the output shaft forming the axle of the output turbine and the pump drive shaft via a high-speed reduction gear, and communicates the cabin space of both the gas generator and the output turbine. In the middle of the injection flow path, a scroll flow path for turning the flow of the high-temperature and high-pressure gas along the axle of the gas generator in the direction along the axle of the output turbine is provided. The flow passage has a ring shape surrounding the axle of the output turbine, and an inlet opening on one side in the horizontal direction is opposed to an exhaust outlet of the gas generator, and opens in a tangential direction of the cross-sectional shape of the passage. The outlet is configured to face the cascade of the output turbine.

[0007] Further, a turbine mounting base is provided on a civil engineering structure forming a pump pit, a pump body is installed in the pump pit, and a gas turbine as a prime mover is installed on the turbine mounting base via a foundation base. A high-speed reduction gear is installed below the mounting base and supported by a civil engineering structure.

[0008] With the above configuration, the high-temperature and high-pressure gas generated in the gas generator of the gas turbine is ejected in a horizontal direction from the exhaust port, and flows into the scroll flow path from the inlet. The high-temperature and high-pressure gas flowing into the scroll flow path spreads annularly around the output turbine axle along the scroll flow path, and flows along the inner peripheral surface shape in the scroll flow path toward the output turbine axle direction. Then, the flow direction is changed, and the gas is ejected from the outlet toward the cascade of the output turbine, and the output turbine is turned to drive the output shaft. The output shaft rotates the pump drive shaft via a high-speed reducer to drive the pump.

Therefore, the flow direction of the high-temperature and high-pressure gas generated in the gas generator can be smoothly changed from the horizontal direction to the direction along the axle of the output turbine by the scroll flow path, and the output turbine and the gas generator can be connected to the axle. It can be easily arranged in a different direction.

The output shaft is located concentrically with or parallel to the pump drive shaft perpendicular to the reference plane of the base, so that the output shaft of the gas turbine and the pump drive shaft are connected via a bevel gear reducer. Can be connected without any problems, compared to the conventional configuration, it is possible to simplify the device configuration and reduce the failure rate and improve the reliability by reducing the number of components, and the gas turbine itself is bent in the middle Since the total length is shortened, the installation area can be reduced.

In operation, the axial thrust acting on the pump drive shaft is received by a high-speed reducer. Since the high-speed reducer is supported by a civil structure on which the pump body is installed, the axial thrust is And does not act on the turbine arrangement surface on the turbine arrangement stand. Therefore, it is not necessary to unnecessarily increase the strength of the turbine mounting frame, and the cost associated with the installation of the gas turbine can be reduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3, an axial flow pump 1 has a pump driving shaft 3 with respect to a horizontal reference plane L of a base 2.
Are set up at right angles, and the gas turbine 4
Are installed on the base 2 along the reference plane L.

The gas turbine 4 is a two-shaft free gas turbine, and includes a front gas generator 5 for generating a high-temperature and high-pressure gas G, and a rear output unit 6 which is bent following the gas generator 5 in the vertical direction. Consists of The gas generator 5 raises the pressure of the air flowing from the intake port by a compressor, guides the air to a combustion chamber, and drives a compressor using a high-temperature and high-pressure gas G generated in the combustion chamber as a power (not shown). ), And is provided so that the axle of the gas generator is parallel to the reference plane L of the base 2.

In the output section 6, an output turbine 7 is provided so that an axle is concentric or parallel to the pump drive shaft 3. An output shaft 8 forming an axle of the output turbine 7 has a direction opposite to an outlet of the output turbine 7. Is connected to the pump drive shaft 3 via a high-speed reducer 9. An exhaust port 1 of the gas generator 5 is provided in the middle of a gas injection passage communicating between the exhaust port 10 of the gas generator 5 and the cascade 11 of the output turbine 7.
A scroll casing 12 following 0 is provided. The gas generator 5 and the scroll casing 12 have a separable structure with the gas generator support 13 as a boundary.

An annular scroll flow passage SF surrounding the scroll casing 12 and the axle of the power turbine 7.
Is for turning the flow of the high-temperature and high-pressure gas G along the axle of the gas generator 5 in the direction along the axle of the output turbine 7. In the scroll flow path SF, an inflow port O opening on one side in the horizontal direction faces an exhaust port of the gas generator 5, and an outflow port O opening in a tangential direction of the flow path cross-sectional shape.
Has a shape facing the cascade 11 of the output turbine 7. The scroll casing 12 includes the output turbine support 1.
4, and an output turbine bearing base 15 is provided below the scroll casing 12. A bearing device (not shown) for supporting the own weight of the output turbine 7 and the output shaft 8 in addition to the thrust generated by the operation of the output turbine is installed inside the output turbine bearing stand 15. An exhaust duct 16 is provided above the scroll casing 12.

The operation of the above configuration will be described below.
The high-temperature and high-pressure gas G generated in the gas generator 5 of the gas turbine 4 is ejected in a horizontal direction from the exhaust port 10 and flows into the scroll passage SF of the scroll casing 12 from the inflow port I.

The high-temperature and high-pressure gas G that has flowed into the scroll flow path SF extends annularly around the axle of the output turbine 7 along the scroll flow path SF, and the scroll flow path S
At F, the flow direction is changed toward the axle direction of the output turbine 7 while flowing along the inner peripheral surface shape, and is jetted from the outlet O toward the cascade 11 of the output turbine 7. 8 is driven. The output shaft 8 drives the axial pump 1 by rotating the pump drive shaft 3 via the high-speed reducer 9.

FIGS. 4 and 5 show another embodiment of the present invention. 4 and 5, a turbine mounting base 22 is provided on a civil engineering structure 21 forming a pump pit,
A pump main body 23 such as a centrifugal pump or a mixed flow pump is installed in the pump pit. The gas turbine 4 as a prime mover is installed on the turbine mounting base 22 via the base 2,
The high-speed reduction gear 9 is disposed below the turbine mounting base 22. The high-speed reduction gear 9 is supported by a civil engineering structure 21 via a support frame 24.

The high-speed speed reducer 9 has a speed reducer input shaft 25 connected to the output shaft 8 and a speed reducer output shaft 26 connected to the pump drive shaft 3, and the speed reducer input shaft 25 and the speed reducer output shaft 26
A gear train 27 for providing an appropriate reduction ratio is provided.
The reduction gear output shaft 26 has a thrust bearing 28, a radial bearing 2
9. Reduction gear fixing member 3 via sleeve bearing 30
It is supported by 1.

Therefore, during operation, the axial thrust acting on the pump drive shaft 3 is received by the high-speed reduction gear 9, but the high-speed reduction gear 9 is supported by the civil engineering structure 21 on which the pump body 23 is installed. The thrust acts on the civil engineering structure 21 and does not act on the turbine placement surface on the turbine placement gantry 22. Therefore, the same effect can be obtained even when the support frame 24 is connected by the legs of the turbine mounting frame 22 (not shown).

[0021]

As described above, according to the present invention, since the flow direction of the high-temperature and high-pressure gas generated in the gas generator is smoothly changed by the scroll flow path, the axle direction of the output turbine and the gas generator is changed. Arrangement can be easily performed. The output shaft is concentric with the pump drive shaft,
Or located parallel to each other, the output shaft and the pump drive shaft can be connected without the intervention of a bevel gear reducer. The rate can be reduced and the reliability can be improved. In addition, since the gas turbine itself is bent in the middle and the total length is shortened, the installation area can be reduced.
Further, it is not necessary to unnecessarily increase the strength of the turbine mounting base, and the cost associated with the installation of the gas turbine can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an output shaft type gas turbine drive pump according to an embodiment of the present invention.

FIG. 2 is a plan view of the output shaft standing type gas turbine drive pump of the embodiment.

FIG. 3 is a perspective view of a scroll casing forming a scroll flow channel in the embodiment.

FIG. 4 is an overall configuration diagram showing an output shaft standing type gas turbine drive pump according to another embodiment of the present invention.

FIG. 5 is a schematic diagram showing a configuration of a high-speed reduction gear according to the embodiment.

[Explanation of symbols]

 Reference Signs List 1 axial flow pump 2 base 3 pump drive shaft 4 gas turbine 5 gas generator 6 output unit 7 output turbine 8 output shaft 9 high-speed reducer 10 exhaust port 11 cascade 12 scroll casing 13 gas generator support 21 civil engineering structure 22 turbine Placement stand 23 Pump body 24 Support frame 25 Reducer input shaft 26 Reducer output shaft 27 Gear train 28 Thrust bearing 29 Radial bearing 30 Sleeve bearing

──────────────────────────────────────────────────続 き Continuing on the front page (72) Nobuhiro Suzuki 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Plant (72) Inventor Toshiaki Iwamoto 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture No. 1 Inside the Kobe Plant of Kawasaki Heavy Industries, Ltd. (72) Inventor Takafumi Nakagawa 3-1-1, Higashi Kawasaki-cho, Chuo-ku, Kobe City, Hyogo Prefecture Inside the Kobe Plant of Kawasaki Heavy Industries, Ltd. (56) References JP-A-7-102995 ( JP, A) JP-A-4-76231 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04D 25/02 F02C 7/32

Claims (2)

(57) [Claims] 1. A pump for rotating a pump drive shaft disposed perpendicular to a reference surface of a base by a gas turbine as a prime mover installed on the base, wherein a gas generator of the gas turbine is mounted on an axle. Is provided so as to be parallel to the reference surface of the base, the output turbine of the gas turbine is provided so that its axle is concentric or parallel to the pump drive shaft, and the output shaft and the pump drive shaft which form the axle of the output turbine are provided. The high-temperature and high-pressure gas flows along the axle of the gas turbine along the axle of the output turbine in the middle of the gas injection passage connecting the cabin space of both the gas generator and the output turbine through a high-speed reducer. The scroll passage has a circular shape surrounding the axle of the output turbine, and an inlet opening on one side in the horizontal direction has a gas passage. An output shaft standing type gas turbine drive pump in which an outlet facing the exhaust port of the neerator and opening in the tangential direction of the cross-sectional shape of the flow passage faces the cascade of the output turbine. 2. A turbine mounting frame is provided on a civil structure forming a pump pit, a pump body is mounted on the pump pit, and a gas turbine as a prime mover is mounted on the turbine mounting frame via a base. 2. The output shaft standing type gas turbine drive pump according to claim 1, wherein a high-speed reduction gear is installed below the disposition base and supported by a civil engineering structure.