JPH0996297A - Gas turbine-driven pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost of manufacture and decrease an occupying area, by driving a plurality of sets of pumps by a single set of gas turbine. SOLUTION: A set of gas turbine 2 for driving each pump 1 is arranged in the upward of a plurality of sets of centrifugal pumps 1 extending a pump drive shaft 3 connected to an impeller 1a in a vertical direction, the gas turbine 2 has a horizontally arranged gas generator 2a and an output part 2b built-in with a vertically arranged output turbine, and an output shaft 4a extended in a vertical direction from the output part 2b is connected to be associated with the pump drive shaft 3 of each centrifugal pump 1 through a reduction gear mechanism 8a and a clutch mechanism 8b of a reduction gear 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to, for example, water and sewer systems,
The present invention relates to a gas turbine drive pump for driving a pump such as a centrifugal pump, a centrifugal pump, a mixed flow pump, or an axial flow pump, which is widely used in a nuclear power plant, a thermal power plant, a steel mill, a chemical factory and the like.

[0002]

2. Description of the Related Art Conventionally, an example of a gas turbine drive pump is shown in FIGS. 5 (a) and 5 (b). This is a gas turbine 2 above a centrifugal pump 1 which is an example of a pump.
And a pump drive shaft 3 connected to an impeller 1a of the centrifugal pump 1 extends in the vertical direction, and a gas generator 2a of the gas turbine 2 is provided.
And the output part 2b containing the output turbine are arranged concentrically and horizontally, so that the output part 2b is connected to the output shaft 4a.
Extends in the horizontal direction, and the output shaft 4a and the pump drive shaft 3 are interlockingly connected via a bevel gear reducer 5.

In the above structure, by driving the gas turbine 2, air is sucked into the gas generator 2a, the sucked air is compressed, and the compressed air burns fuel to generate high-temperature high-pressure gas. The high-temperature high-pressure gas causes the output turbine in the output section 2b to rotate at high speed,
The impeller 1a is rotated via the output shaft 4a, the bevel gear reducer 5 and the pump drive shaft 3. As a result, the liquid is sucked into the spiral pump chamber 6 from the suction port 6a of the centrifugal pump 1 in the direction of arrow A, and the sucked liquid is subjected to centrifugal force by the impeller 1a in the direction of arrow B from the discharge port 6b. It is designed to be pumped.

[0004]

SUMMARY OF THE INVENTION In the above conventional configuration,
Since the gas turbines 2 are individually provided in the spiral pumps 1, when a plurality of the spiral pumps 1 are used as shown in FIG. It is necessary to provide it and the production cost is high.

[0005] Further, since the gas generator 2a and the output portion 2b of the gas turbine 2 are concentrically arranged, the overall length is increased and the occupied area is increased. Further, of the plurality of spiral pumps 1, some of the spiral pumps 1
Is stopped, it takes time and effort to manage and operate the gas turbine 2 of the stopped centrifugal pump 1, and it takes time to drive the gas turbine 2 to bring the stopped centrifugal pump 1 into a steady operation state. There is a drawback that it takes.

In view of the above problems, the present invention makes it possible to reduce the manufacturing cost, reduce the occupied area, and save the trouble in the management operation of the gas turbine, and to stop the pump. It is an object of the present invention to provide a gas turbine drive pump that can immediately bring the pump to a steady operation state.

[0007]

In order to achieve the above object, according to the present invention, a pump driving shaft connected to an impeller is provided above a plurality of pumps having vertically extending pump driving shafts. A gas turbine for driving the gas turbine, the gas turbine having a horizontally arranged gas generator, and an output section containing an uprightly arranged output turbine; An output shaft extending vertically from the output portion is interlocked with a pump drive shaft of each of the pumps via a reduction gear.

In the above structure, by driving the gas turbine, air is sucked into the gas generator,
The intake air is compressed, the fuel is burned by the compressed air to generate a high-temperature high-pressure gas, and the high-temperature high-pressure gas is used to rotate the output turbine of the output unit at high speed, via an output shaft, a reduction gear, and a pump drive shaft. Rotate the impeller. As a result, liquid is sucked into the pump chamber from the suction ports of the plurality of pumps, and the sucked liquid receives centrifugal force from the impeller and is pumped from the discharge port.

In this case, since a plurality of pumps are driven by one gas turbine, manufacturing costs can be reduced. In addition, the gas generator of the gas turbine and the output section containing the output turbine are arranged at right angles to each other, and the gas turbine is formed in a bent shape in the middle, so that the conventional gas generator and the output As compared with a gas turbine in which the parts are arranged concentrically, the overall length can be shortened, and the occupied area can be reduced by the shortened length.

According to a second aspect of the present invention, in the first aspect of the present invention, the speed reducer is provided with a clutch mechanism for individually connecting each pump drive shaft to an output shaft. I have.

According to the above construction, the clutch mechanism is turned on / off.
By performing the OFF operation, all or some of the plurality of pumps can be driven as necessary. In addition, since the gas turbine is constantly operated, no troublesome operation is required for the management operation, and the clutch mechanism is turned on, whereby the steady operation state can be immediately established.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B show a gas turbine drive pump according to an embodiment of the present invention, in which a plurality of pump drive shafts 3 connected to an impeller 1a are vertically extended. A single gas turbine 2 for driving the centrifugal pump 1 is provided above the centrifugal pump 1 in this embodiment.

The gas turbine 2 has a gas generator 2a disposed horizontally and an output portion 2b containing an output turbine 4 (described later) disposed vertically, and a vertical direction from the output portion 2b. The output shaft 4a extending to the
Are linked to each pump drive shaft 3 via a speed reduction mechanism 8a and a clutch mechanism 8b.

According to the above configuration, since a plurality of spiral pumps 1 are driven by one gas turbine 2, manufacturing costs can be reduced. Further, the gas generator 2a of the gas turbine 2 and the output portion 2b containing the output turbine 4 are arranged at right angles to each other, and each of the gas turbines 2 is formed in a bent shape in the middle. 5, the overall length can be reduced as compared with the conventional gas turbine 2 in which the gas generator 2a and the output section 2b are arranged concentrically, and the occupied area is reduced by the shortened length. Can be.

Further, the output shaft 4a of the output portion 2b extends in the vertical direction, and the output shaft 4a extending in the vertical direction and the pump drive shaft 3 extending in the vertical direction of the centrifugal pump 1 are interlocked via a speed reducer 8. Since they can be connected, it is not necessary to interpose a horizontally long bevel gear reducer for converting the drive direction between both shafts 3 and 4a, and the gas turbine 2 is housed substantially within the exclusive range of the centrifugal pump 1. be able to.

Still further, the clutch mechanism 8b of the speed reducer 8
By turning on and off, all or some of the plurality of centrifugal pumps 1 can be driven as required. In addition, since the gas turbine 2 is constantly operated, the management operation does not take much trouble, and the steady operation state can be immediately established by turning on the clutch mechanism 8b.

The details of the gas turbine 2 will be described with reference to FIGS. 2 to 4. This is a two-shaft output shaft standing type gas turbine, and its gas generator 2a is mounted on a base 1
0 is fixed via a support frame 11 to the intake port 12
The high temperature high pressure gas generated by combusting the fuel in the combustion chamber by compressing the air sucked in from the compressor by the compressor and discharging the high temperature high pressure gas from the exhaust port 13 drives the high temperature high pressure gas. The turbine for use is driven to rotate.

The output section 2b passes the high-temperature and high-pressure gas discharged from the gas generator 2a through the scroll flow path SF in the scroll casing 15 to the moving blades 4 of the output turbine 4.
The output shaft 4a is rotated at high speed by ejecting the output shaft 4a toward b.

As shown in FIG. 4, the scroll casing 15 is disposed concentrically with the output shaft 4a and has an annular gutter portion 15a communicating with the exhaust port 13 of the gas generator 2a.
And an annular exhaust port 15b that is integrally formed with the annular trough portion 15a and faces the moving blade 4b.
The direction of the high-temperature high-pressure gas discharged along the horizontal direction from is changed upward. In addition, 16 is an exhaust duct connected to the upper part of the scroll casing 15, 17 is a bearing frame provided between the scroll casing 15 and the base 10, and has a built-in bearing device that rotatably supports the output turbine 4. are doing. 18 is a scroll casing 15
Is a fixing member for fixing the to the base 10.

The operation of the above structure will be described. The high-temperature and high-pressure gas generated in the gas generator 2a is
From the above, it jets out in the horizontal direction and flows into the scroll channel SF. The high-temperature and high-pressure gas that has flowed into the scroll flow path SF spreads annularly along the inner surface of the scroll flow path SF, changes its direction upward, and is ejected to the moving blades 4b of the output turbine 4 to be output to the output shaft 4a. Is rotated at a high speed to drive the speed reduction mechanism 8a of the speed reduction device 8. Next, if necessary, all or part of each clutch mechanism 8b is turned on, whereby the spiral pump 1 is driven via the clutch mechanism 8b and the pump drive shaft 3 in the on state, and the spiral pump 1 The liquid is sucked into the pump chamber 6 from the suction port 6a, and the sucked liquid receives centrifugal force by the impeller 1a and is pumped from the discharge port 6b.

[0021]

According to the first aspect of the present invention, since a plurality of pumps are driven by one gas turbine, the manufacturing cost can be reduced and the gas of the gas turbine can be reduced. Since the generator and the output section containing the output turbine are arranged at right angles to each other and the gas turbine is formed in a bent shape in the middle, the conventional gas generator and the output section are concentric. The overall length can be reduced as compared to the gas turbines arranged, and the occupied area can be reduced by the reduced length.

According to the second aspect of the present invention, all or some of the plurality of pumps can be driven as required by turning on / off the clutch mechanism, and the gas turbine is constantly operated. Since the vehicle is in operation, no trouble is required for the management operation, and the steady operation state can be immediately established by turning on the clutch mechanism.

[Brief description of drawings]

FIG. 1A is a plan view of a gas turbine drive pump according to an embodiment of the present invention, and FIG. 1B is a longitudinal sectional view of the same.

FIG. 2 is a side view of the gas turbine.

FIG. 3 is a plan view of the gas turbine.

FIG. 4 is a perspective view of the scroll casing.

5A is a plan view showing a conventional example, and FIG. 5B is a longitudinal sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Centrifugal pump (pump) 1a Impeller 2 Gas turbine 2a Gas generator 2b Output part 3 Pump drive shaft 4 Output turbine 4a Output shaft 8 Reduction gear 8b Clutch mechanism

Claims (2)

[Claims] 1. A gas turbine for driving each pump is disposed above a plurality of pumps each having a pump drive shaft connected to an impeller and extending in a vertical direction. The turbine has a gas generator arranged horizontally and an output section containing an output turbine arranged upright, and an output shaft extending vertically from the output section extends through a reduction gear to each of the pumps. A gas turbine drive pump, which is linked to a pump drive shaft. 2. The gas turbine drive pump according to claim 1, wherein said speed reducer is provided with a clutch mechanism for individually connecting each pump drive shaft to an output shaft.