JP3524382B2 - Vertical pump and its driving device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft pump and a drive device for the vertical shaft pump, and more particularly to a vertical shaft pump and a drive device for the vertical shaft pump which are suitable when a single-shaft gas turbine is used as the drive device.

[0002]

2. Description of the Related Art As a driving machine for an emergency vertical shaft pump used in a drainage pump facility, there is a diesel engine, an electric motor or a gas turbine. Until now, diesel engines have been widely used because they are relatively easy to maintain. However, the use of the gas turbine has the advantages that the entire apparatus can be made smaller and lighter, and the size of the pumping station can be reduced and the foundation work can be simplified. Further, it does not require cooling water, consumes very little lubricating oil, and has the advantage of being able to quickly respond to changes in load, and has been rapidly spreading in recent years.

Although the gas turbine drive device has such advantages, since the gas turbine body rotates at high speed,
When driving a low-speed rotating load such as a pump, it is necessary to significantly reduce the output of the gas turbine. For this reason, a high-speed reducer with a large reduction ratio was installed in the gas turbine, and the engine speed (1000-1800
rpm). An example of such a vertical shaft pump is described in, for example, Japanese Patent Laid-Open No. 9-32795.

On the other hand, an example of using a speed reducer with a fluid coupling between a drain pump and a prime mover is disclosed in JP-A-8-312578, and an example of using a fluid coupling and a speed reducer between the drain pump and the prime mover is disclosed in JP-A-9-312578. -14177.

[0005]

SUMMARY OF THE INVENTION By the way, the one disclosed in Japanese Patent Laid-Open No. 9-32795 shown in the above-mentioned prior art is a coupling between a gas turbine holding a high speed reducer and a reducer having a bevel gear. Are connected. Therefore, the dimension in the flow direction of the pump becomes long, and the installation area of the device becomes large. Further, since both the gas turbine and the bevel gear reducer are supported by the foundation, there are problems that the construction cost of the civil engineering structure is high and the mutual positioning of the devices becomes difficult.

Further, Japanese Patent Laid-Open No. 8-3125 shown in the above prior art.
Japanese Patent Laid-Open No. 78 and Japanese Patent Laid-Open No. 9-14177 do not take into consideration the use of a gas turbine as a prime mover to prevent the installation area of pump equipment from increasing.

In order to reduce the size of the apparatus, it is advantageous to use a single-shaft gas turbine in which the compressor and the output turbine are separated, rather than a two-shaft type, in which the compressor and the output turbine are separated. However, if a single-shaft gas turbine is used, the structure will be small, but the starting torque will be small. Therefore, unlike the two-shaft gas turbine, there is a problem that the pump cannot be started with the pump connected.

The present invention has been made in view of the disadvantages of the above-mentioned prior art, and an object thereof is to make the rotation speed of a pump variable and to make a drainage pump of a single-shaft gas turbine when used as a drive device. It is to make driving highly efficient.
Another object of the present invention is to provide a drainage pump driven by a single-shaft gas turbine and a drive unit used for the same, which enables downsizing and simplification of drainage pump equipment. Still another object of the present invention is to provide a vertical shaft pump and a drive device used for the vertical shaft pump that can achieve the same or higher performance as when a single-shaft gas turbine is used.

[0009]

A first feature of the present invention for achieving the above object is to provide a substantially horizontal single-shaft type gas turbine and a rotary shaft driven by the gas turbine. In a vertical pump having a vertical pump body arranged in a vertical direction, a reduction gear having a built-in fluid coupling is provided between the gas turbine and the pump body,
A gas turbine is integrally mounted on this speed reducer.

Preferably, the speed reducer has an input shaft having a first pinion gear, a first intermediate shaft having a large gear meshing with the first pinion gear, and one end of the first intermediate shaft. A second intermediate shaft connected to the input shaft of the fluid coupling and the other end of the second intermediate shaft having a second pinion gear connected to the output shaft of the fluid coupling; A third gear having a second gear that meshes with the gear and a bevel gear at the end
And an output shaft having a large bevel gear that meshes with the bevel gear, and the arrangement direction of the input shaft and the arrangement direction of the output shaft form a substantially right angle.

Further, preferably, a main oil pump for lubricating at least gears, a hydraulic oil pump for a fluid coupling for supplying hydraulic fluid to a fluid coupling, a starter for driving a gas turbine, a fuel pump, a governor. Any of these auxiliary machines is attached, and the auxiliary machine attached to this speed reducer is driven by power transmitted to the input shaft and not input to the fluid coupling.

More preferably, a generator driven by the power input to the speed reducer and not transmitted to the fluid coupling is attached to the speed reducer, or the output shaft of the fluid coupling and the branch from this output shaft. At least one of the rotating shafts provided as described above extends outward from the case of the speed reducer.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of a pumping station according to the present invention, FIG. 2 is a plan view of the pumping station shown in FIG. 1, and FIG. 3 is an example of a speed reducer used for a vertical shaft pump of the present invention. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.

In the drainage pump facility, as shown in FIGS. 1 and 2, the uniaxial gas turbine 1 is integrally mounted on the speed reducer 2. Here, the mount means that the gas turbine is supported only by the speed reducer and is not supported by other things. Further, “integrally” means that both are coupled by a method such as bolt coupling so that they can be handled integrally via flanges provided on both the gas turbine and the speed reducer. The speed reducer 2 is fixed to the case 5 of the pump 3 installed on the floor of the building 4 so that the rotation axis direction of the gas turbine 1 is perpendicular to the pump flow direction. That is, in this embodiment, the impeller portion of the pump 3 is suspended downward from the hole formed in the floor of the building 4 and is submerged in the water tank, and the pump 5 is moved in the case 5 in the flow direction. Changing from upward to horizontal. As shown in FIG. 2, drainage of rainwater or the like flowing into the water supply tank 19 provided on the back side of the paper in the case 5 portion is discharged to the discharge water tank 21 provided on the right side of the paper through the discharge pipe. At this time, the rotating shaft of the gas turbine 1 is arranged in the vertical direction on the paper surface. In the above embodiment, the pump 3 is fixed to the building 4 at the flange portion, but neither the gas turbine 1 nor the speed reducer 2 is fixed to the building 4. Further, in this embodiment, the pump is fixed to the building 4 by the flange portion.
Alternatively, the speed reducer 2 may be fixed to the building 4. Even in that case, the gas turbine 1 is not fixed to the building 4.

The speed reducer 2 of the present embodiment configured as described above
Will be described below in detail. As shown in FIGS. 3 and 4, the gas turbine 1 is integrally mounted on a case 18 of the speed reducer 2, and an output shaft 6 thereof is coupled to an input shaft 8 of the speed reducer 2 via a coupling 7. The input shaft 8 of the speed reducer 2 is provided with a cylindrical pinion gear 9 integrally with or separately from this shaft. The small gear 9 of the input shaft 8 is the intermediate shaft 11A.
Meshes with a large cylindrical gear 10 of the gear, and the two large and small gears 8 and 9 form a first-stage gear train. Intermediate shaft 11A
Has one end extending to the opposite side of the gas turbine 1 beyond the center of the speed reducer 2 and having a fluid coupling 2 through a coupling.
2 is connected to the attached intermediate shaft 11C. With such a configuration, the internal space of the speed reducer 2 is effectively used, and the distance between the tip of the input shaft 8 and the output shaft 17 described later, that is, the center of the drive shaft of the pump 3, is shortened.

A hollow shaft is used as the intermediate shaft 11A for weight reduction, and both ends of the intermediate shaft 11A are coupled by a coupling. The input portion of the fluid coupling 22 is the intermediate shaft 1
It is connected to the intermediate shaft 11C connected to 1A. On the other hand, the output portion of the fluid coupling 22 is connected to the tip of the intermediate shaft 11B having the cylindrical small gear 12. Cylindrical pinion 12
Meshes with a cylindrical large gear 13 attached to the intermediate shaft 14. These two large and small gears 12 and 13 form a second-stage cylindrical gear train. A bevel gear 15 is provided at an end of the intermediate shaft 14 having the large gear 13 on the center side of the speed reducer 2. An output shaft 17 having a large bevel gear 16 that meshes with the small bevel gear 15 is disposed substantially vertically at the center of the speed reducer 2, and is connected to the rotary shaft of the pump 3 via a coupling. These bevel gears 15 and 16 form a bevel gear train in the third stage.

In the above embodiments, the rotary shafts such as the input shaft 8, the intermediate shafts 11A to 11C, and the output shaft 14 are supported by rolling or sliding bearings, and all of the rotary shaft, the bearings, the gears, and the fluid coupling 22 are supported. Is stored in the case 18. In the case 18, a main oil pump 23 for lubricating the above gears and bearings, a hydraulic oil pump 24 for supplying fluid to the hydraulic coupling, and a starter 25 for driving the gas turbine 1, Fuel pump 26, governor 2
Auxiliary machines such as 7 are attached using the shaft branched from the input shaft 8 and the intermediate shaft 11A via gears.

According to this embodiment, auxiliary equipment such as a high-speed reducer and a starter for driving, which are conventionally attached to a gas turbine, are integrally provided in the reducer, so that the structure is simplified and compacted. Became possible. In addition, since the bevel gear is used, the reducer casing is larger than when not using the bevel gear, but since the auxiliary machine is attached to the space formed by this enlargement, the reducer space is reduced. Can be effectively used, and the size of the entire device can be reduced.

In the above embodiment, all of the accessories are attached to the reducer, but the present invention is not limited to this.
Compactness and simplification of the structure can be achieved only by mounting any one of the above-mentioned auxiliary machines to the speed reducer. In addition, the auxiliary equipment attached to the reduction gear is the power input to the reduction gear but not to the fluid coupling, in other words, the power of the shaft provided before the fluid coupling or the shaft branched before the fluid coupling. It is desirable to drive with.

Next, the operation of this embodiment configured as described above will be described. When the gas turbine 1 as a prime mover is driven by the starter 25, its rotation is transmitted to the input shaft 8 of the speed reducer 2 via the coupling 7, and the speed reducer 2
Is driven. The power transmitted to the input shaft 8 is reduced by the first-stage cylindrical gear train and transmitted to the intermediate shaft 11A.
The intermediate shaft 11C connected to the intermediate shaft 11A includes a fluid coupling 22
It is connected to the input shaft of to prevent the pump load from being suddenly loaded when the drainage pump is started. That is, the fluid coupling 22 is adjusted to gradually load. Further, by adjusting the amount of hydraulic oil supplied to the inside of the fluid coupling 22 using the hydraulic fluid pump 24 for fluid coupling,
The rotational speed of the rotary shaft of the pump connected to the intermediate shaft 11B can be controlled arbitrarily.

The power transmitted from the fluid coupling 22 to the intermediate shaft 11B is further decelerated by the second-stage cylindrical gear train and the third-stage bevel gear train. Along with this, the direction of the rotating shaft changes from horizontal to vertical, and the output shaft 17 arranged almost vertically is provided.
The power of the gas turbine is transmitted to. The power transmitted to the output shaft 17 drives the rotating shaft of the pump via the coupling. When the pump shaft is driven, the water accumulated in the water supply tank 19 is discharged from the discharge pipe 20 to the discharge water tank 21. Further, the lubricating oil stored in the oil tank is supplied by the main oil pump 23 to the bearing portion including the meshing portion of the gear and the bearing of the gas turbine 1 to lubricate the gear and the bearing to prevent seizure and damage thereof. To prevent.

According to this embodiment, the problem that the output rotation speed is fixed due to the adoption of the one-shaft type gas turbine for downsizing and downsizing of the drainage pump causes a problem such as a fluid coupling on the intermediate shaft. This can be solved by providing speed control means. Further, the length of the overhang portion of the gas turbine integrally mounted on the speed reducer 2 can be significantly shortened. Further, it does not support the overhang end. Further, as described above, since the intermediate shaft is extended to the side opposite to the gas turbine, the distance between the input shaft of the speed reducer and the center of the drive shaft of the pump can be shortened.

As a result, particularly in the vertical pump equipment in which a plurality of pumps are arranged, the gas turbine can be arranged in the space between the two pumps necessary for preventing the interference of the pump suction flow, and the pump flow The installation space in the direction can be significantly reduced. As a result, the installation area of the vertical shaft pump can be reduced. Further, unlike the case where the vertical gas turbine is used, there is no need to increase the height of the building, and the space saving effect is great. Further, since the gas turbine is integrally mounted on the speed reducer, the installation cost can be reduced.

Further, since it is not necessary to support the overhang end of the gas turbine, the rotating shaft of the gas turbine can be set in any direction. Therefore, for example, it is possible to set the rotating shaft of the gas turbine in the pump flow direction, and in this case, the dead space can be further effectively utilized.

Next, another embodiment of the present invention will be described with reference to the conceptual diagram shown in FIG. The present embodiment is different from the first embodiment in that the generator 28 is attached to the speed reducer and the shaft 32 for driving the electric motor is provided. Generator 28
Is connected to a rotary shaft branched from the input shaft 8 of the speed reducer 2 via pulleys 29 and 30 and a belt 31. Other configurations are the main oil pump 23 and the hydraulic oil pump 2 for fluid coupling.
Although the mounting position of No. 4 is slightly different,
Is the same as the embodiment described above.

Next, the operation of this embodiment will be described.
When the gas turbine 1 which is the prime mover is driven by the starter 25, the rotation thereof drives the generator 28, and the electric power generated there drives the pump auxiliary valves such as the discharge valve of the pump, the dust remover and the ventilation fan. This allows a blackout start without commercial power or private power generation equipment. In addition, since the shaft 32 for driving the electric motor is provided, the electric oil pump 33 can be used together during the performance test of the pump in the factory, the pumping operation, and the purification operation, so that the electric motor driven pump can be operated without using the gas turbine. Becomes

According to this embodiment, a blackout start can be performed without a commercial power source or a private power generation facility. Also,
It is possible to operate the pump with an electric motor, and it is possible to easily perform factory tests.

In the above embodiment, the input shaft 8 of the speed reducer 2 is
Pulleys 29, 3 using the power of the rotating shaft 40 branched from
Although the generator 28 is driven by 0 and the belt 31, the position of the generator is not limited to this. In short, power on the front side of the fluid coupling may be used. Behind the fluid coupling,
This is because the power that can be taken out by the fluid coupling may fluctuate.

[0029]

As described above, according to the present invention, 1
Both the downsizing of the shaft type gas turbine and the variable speed of the fluid coupling can be used, and the vertical axis pump equipment can be downsized. Further, along with this, it becomes possible to reduce the construction cost of the vertical shaft pump equipment. Further, by adopting the single-shaft gas turbine, it is possible to provide a small vertical shaft pump with a simple configuration.

Further, according to the present invention, it is possible to provide a drive device for a vertical shaft pump which has a small installation area and installation space, a construction cost of a civil engineering structure can be reduced, and a rotational speed can be continuously varied.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a pumping station according to the present invention.

FIG. 2 is a plan view of the pumping station shown in FIG.

FIG. 3 is a cross-sectional view of a speed reducer used in an embodiment of the vertical shaft pump of the present invention.

4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a schematic diagram of a speed reducer used in another embodiment of the vertical shaft pump of the present invention.

[Explanation of symbols]

1 ... Gas turbine, 2 ... Reducer, 3 ... Pump, 4 ... Building, 5 ... Case, 6 ... Output shaft, 7 ... Coupling, 8 ...
Input shaft, 9 ... Cylindrical small gear, 10 ... Cylindrical large gear, 11A ...
Intermediate shaft, 11B ... Intermediate shaft, 12 ... Cylindrical small gear, 13 ... Cylindrical large gear, 14 ... Intermediate shaft, 15 ... Bevel small gear, 16 ... Bevel large gear, 17 ... Output shaft, 18 ... Case, 19 ... Water tank , 20 ... Discharge piping, 21 ... Discharge water tank, 22 ... Fluid coupling, 23 ... Main oil pump, 24 ... Fluid coupling hydraulic oil pump, 25 ... Starter, 26 ... Fuel pump, 27 ... Governor, 28 ... Generator, 29 , 30 ... pulleys, 31 ... belts, 32 ... electric motor driving shafts, 33 ... electric oil pumps.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sadakazu Sato, 603 Kandamachi, Tsuchiura City, Ibaraki Prefecture Hitachi Co., Ltd., Tsuchiura Plant (72) Inventor, Shigeru Toida 603, Kachimachi, Tsuchiura City, Ibaraki Hitachi Tsuchiura, Ltd. Inside the factory (72) Mutsuko Yoshitsuru Inoue Yoshitsuru, 603 Jinritsucho, Tsuchiura City, Ibaraki Hitachi, Ltd. Tsuchiura Factory Inside (72) Inventor Keiko Kuwahara, 603, Jinmachi, Tsuchiura City, Ibaraki Hitachi Ltd., Tsuchiura Factory (72) Inventor Yoshihiko Yoshikawa 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Inside the Machinery & Electrical Engineering Department, Hitachi, Ltd. (56) Reference JP-A-7-102995 (JP, A) JP-A-10-18989 (JP, A) JP Japanese Patent Laid-Open No. 5-248258 (JP, A) Japanese Patent Laid-Open No. 3-54305 (JP, A) Japanese Patent Laid-Open No. 7-158110 (JP, A) Japanese Patent Laid-Open No. 61-145325 (JP, A) JP 9-32795 (JP, A) JP 8-312578 (JP, A) JP 9-14177 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) ) F04D 13/02 F02C 6/00

Claims (6)

(57) [Claims] 1. A uniaxial type gas turbine arranged substantially horizontally.
And the rotating shaft driven by this gas turbine is almost
With a vertical pump body arranged vertically.
In the axial pump, the horizontal output shaft of the gas turbine
Force shaft is connected and output shaft is connected to the vertical rotation shaft of the pump.
The speed reducer is installed in the
This fluid coupling is located at the center of the speed reducer.
It is located on the opposite side of the bin and the output of the gas turbine
Located in the middle of transmitting to the rotary shaft of the pump, the gas turbine
Mount it on the reducer without fixing it to the building.
Vertical shaft pump characterized by fixing the reduction gear to the building . 2. A uniaxial type gas turbine arranged substantially horizontally.
And the input shaft to the horizontal output shaft of this single-shaft gas turbine.
Is connected and the output shaft is connected to the vertical rotation shaft of the pump.
A drive device for a vertical shaft pump having a speed reducer,
The speed reducer has a built-in fluid coupling.
Located on the opposite side of the gas turbine across the heart
Power transmission that transmits the output of the gas turbine to the rotating shaft of the pump.
Located in the middle of the building, fix the gas turbine to the building.
Instead, it is mounted integrally on the reducer, and the reducer is installed in the building.
A vertical shaft drive device characterized by being fixed . 3. A first reduction gear having a first gear having an input shaft having a first small gear and a large gear meshing with the first small gear.
Intermediate shaft, a second intermediate shaft whose one end is connected to the first intermediate shaft and the other end is connected to the input shaft of the fluid coupling, and a second intermediate shaft which is connected to the output shaft of the fluid coupling. Second intermediate shaft having a small gear of the second type and a second intermediate shaft meshing with the second small gear of the second type.
A third intermediate shaft having a large gear and a bevel gear at its end, and an output shaft having a bevel gear meshing with the bevel gear, and the arrangement direction of the input shaft and the arrangement of the output shaft The vertical shaft pump according to claim 1, wherein the vertical axis is substantially perpendicular to the direction. 4. A main oil pump for lubricating at least the gear, a hydraulic oil pump for a fluid coupling for supplying hydraulic fluid to the fluid coupling, a starter for driving a gas turbine, a fuel pump, 4. The governor is equipped with any accessory, and the accessory attached to the speed reducer is driven by power transmitted to the input shaft and not input to the fluid coupling. Vertical pump described. 5. A generator, which is driven by the power input to the speed reducer and is not transmitted to the fluid coupling, is attached to the speed reducer.
The vertical shaft pump according to any one of 3 and 4. 6. An output shaft of the fluid coupling and at least one shaft of a rotary shaft branched from the output shaft is extended outward from a case of the speed reducer. The vertical shaft pump according to any one of 1, 3, or 4.