JPH08270406A - Gas turbine equipment and casing jacking-up method of the same - Google Patents

Abstract

PURPOSE: To improve operability and safety and enable stable jacking-up. CONSTITUTION: In the gas turbine equipment, an air path (intake duct 8) for sending air to a gas turbine air compressor 10 is located below the air compressor and formed to receive air through an intake plenum 12 provided in parallel to an opening part and the air compressor provided on a frame bed of the gas turbine 3 from the air path. The intake plenum 12 is provided on the lower wall surface with a carrier seat 17 of a jack for jacking up a gas turbine casing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack-up device and a jack-up method for a gas turbine casing used, for example, when disassembling or assembling a gas turbine, and more particularly, for supplying air to the gas turbine from a lower part of the mount to the mount. The present invention relates to a jack-up device and a jack-up method for a gas turbine casing that are formed so as to be performed through a through hole.

[0002]

2. Description of the Related Art A conventional jack-up device and a jack-up method for a gas turbine casing will be described with reference to FIGS. FIG. 11 shows that the air (combustion air, cooling air) supply to the gas turbine is
It is formed so as to be performed from the upper part, and is generally called an upper intake system. That is, the gas turbine 4 and the generator 5 are installed on a gas turbine / generator mount 3 (hereinafter referred to as a T-G mount 3) and installed on a floor 2 in the gas turbine / generator building 1. There is.

The gas turbine 4 includes a combustor 13 and an air compressor 10, and the air compressor is axially connected to the gas turbine 4. Air is taken into the air compressor 10 from an air intake chamber 7 provided with a filter 9, and outside air is introduced through an intake duct 8 from above, that is, by an upper intake system.

At the inlet of the air compressor 10, the intake duct 8
The intake plenum 12 for deflecting the inflow air to the air compressor 10 is installed, and the air compressor inlet casing 15 also projects into the intake plenum 12 for the purpose of rectifying the inflow air. There is. In order to avoid the occurrence of problems such as surging in the air compressor 10 due to the air flowing into the air compressor 10, generally, no structure that disturbs the flow is installed in the air passages of the intake duct 8 and the intake plenum 12. A uniform flow is obtained at the inlet of the air compressor 10.

The gas turbine 4 mixes the air and fuel gas compressed by the air compressor 10 with a combustor 13 provided between the gas turbine 4 and the air compressor 10 and ignites them.
The combustion gas is generated and the thermal energy of the combustion gas rotates the gas turbine rotor, and the rotor of the generator 5 is rotated to generate electricity.

In this case, since a temperature difference of several hundreds of degrees occurs inside the gas turbine 4 before and after the combustion gas is generated, the casing of the gas turbine has a flange on the horizontal joint surface in order to reduce thermal stress. Including the thin plate structure is adopted. The casing of the air compressor 10 also has a thin plate structure because the internal fluid, air, has a low temperature and a low pressure.

In the thus arranged gas turbine, at the time of assembling the gas turbine or performing a regular inspection, the gas turbine casing is divided along the horizontal joint surface to disassemble the upper half, and the lower half casing alone is operated. However, since the casing has a thin plate structure as described above, when the upper half casing is disassembled into a half-divided state, the horizontal plane becomes narrow, resulting in an elliptical deformation. As a matter of course, the deformation of the casing will hinder the measurement of the clearance between the gas turbine components and the extraction of the rotor.

In order to solve this problem, before disassembling the casing up and down, the jack 14 is installed here by utilizing the vertical flange portion of the casing having a relatively high rigidity as shown in FIG. A method is adopted in which the lower half casing is supported by the jack 14 to prevent the elliptical deformation that occurs when the jack 14 is in the half-split state. This is called jacking up of the casing. In addition, 17 arranged in the lower part of the jack 14 is the TG mount 3
It is a jack seat set on the floor surface of.

This jack-up is also used in the compressor inlet casing 15 inside the intake plenum 12, in which case the jack 14 is used as the intake plenum 12.
It is supported from the bottom plate 16 through the jack seat 17.

The gas turbine power generation facility is a gas turbine 4
It is often used as a so-called simple cycle composed of a generator and a generator 5, and in the past, the base TG mount 3 is a so-called simple cycle, which is composed of only substantial parts as shown in FIG. A solid basic structure was used. However, in recent years, in order to further improve the power generation efficiency, a so-called combined cycle has been adopted in which a gas turbine and a steam turbine are combined to generate power.

FIG. 14 shows an example of the arrangement of the combined cycle. The gas turbine 4 is uniaxially combined with the steam turbine 11, and is installed on the T-G pedestal 3 which is elevated according to the shape of the steam turbine side.

In this way, the gas turbine 4 is mounted on the elevated T
-When installing on the G pedestal 3, in consideration of the space advantage in the arrangement, generally, the intake duct 8 is installed in the air compressor 1
0 below, and clean air from the bottom side of the air compressor 10
I am trying to make it flow into. In the case of such a lower intake system, the air intake chamber 7 can also be set low, the overall arrangement is harmonious, and the effect of using the space is great, so this system is often used.

Recently, a step has been taken from this lower intake system, and as shown in FIG. 15, for example, as shown in FIG. 15, a wall is provided between the lower column bases of the gas turbine in the T-G mount to form a tunnel structure in this portion. By using this tunnel part also as the intake passage of the air compressor, the intake duct is partially removed to eliminate the loading and setting work of the intake duct, reduce the physical quantity, and increase the intake passage area. Arrangements that can reduce pressure loss and improve performance have been adopted. In addition, as a thing related to this, for example, JP-A-4-187830.
Publication.

[0014]

With the gas turbine thus formed, it is possible to carry in the intake duct and eliminate setting work, and to reduce pressure loss due to expansion of the intake passage area. However, in the lower intake system as described above, since the intake plenum complies with the intake duct below, the lower surface of the intake plenum becomes an air circulation hole, that is, an opening, so that The installation floor of the jack-up jack at the time of disassembling (or assembling) of the air intake duct is located at a very low position, that is, the bottom plate portion of the intake duct (a in FIG.
Therefore, in the actual situation, a jack seat having a height of about 10 m is set and the jack is installed on the jack seat, which may reduce workability and may cause a safety problem. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a jack of a gas turbine casing of this kind which has good workability, can be stably jacked up, and can be improved in safety. An up device and a jack up method are provided.

[0016]

That is, according to the present invention, an air passage for feeding air to a gas turbine air compressor is located below the air compressor, and the air feeding from the air passage to the air compressor is In a gas turbine facility formed so as to be performed through an opening provided in a gas turbine mount and an intake plenum provided in parallel with an air compressor, a gas turbine casing is provided on a lower wall surface of the intake plenum. A jack receiving seat for jacking up is provided to achieve the intended purpose.

Further, the jack seat is attached to the wall surface of the intake plenum as temporary equipment.
In addition, a jack seat is provided on the lower wall surface of the intake duct that engages with the intake plenum. Further, these jack seats are detachably provided.

[0018]

That is, in the gas turbine facility thus formed, when the casing is jacked up, the jack seat is provided at a position close to the inlet of the intake plenum, and therefore the base part on which the jack is installed, In other words, the portion of the jack that receives the reaction force is firm, and it does not wobble and is stable in installation, improving workability and safety.

Further, by setting a perforated bed for rectifying the turbulence of the inflowing air on the inlet side of the intake plenum permanently, the jack seat can be installed permanently, and the operator can place the jack seat on the perforated floor during jack-up work. Only by installing the jack through the compressor inlet casing, workability and safety are further improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 shows a jack-up device for the gas turbine casing. Since the same parts as those of the conventional one are designated by the same reference numerals, detailed description thereof will be omitted. In the figure, the inflowing air flows into the air intake plenum 12 through the air intake duct 8 and further enters the air compressor 10 from the entire circumference of the bellmouth-shaped compressor inlet casing 15 for smoothing the flow. Inflow.

Due to this inflow of air, the T-G mount is
Although a through hole is provided, when jacking up the compressor inlet casing 15 located above this through hole, a jack seat 17 is provided on the lower wall surface of the intake plenum 12, and the jack 14 is provided on this. It is installed and the compressor inlet casing 15 is jacked up. By doing so, the jack-up work is facilitated and the safety is improved.

FIG. 2 is a modification of the present invention and is an enlarged view of the portion P in FIG. When the weight of the compressor inlet casing is large and the jack seat must be made large, the jack seat may disturb the flow of the air flowing into the intake plenum.
The case is shown where the gas turbine is removed during operation and used as temporary equipment that is set only when disassembling the compressor inlet casing. A pocket 18 is provided on the lower wall surface of the intake plenum 12 so that the jack seat 17 can be used only when used here.
The compressor inlet casing can be jacked up without disturbing the flow of air during operation.

FIG. 3 shows another modification in combination with the porous bed, and shows an enlarged portion corresponding to the portion P in FIG. In this example, a porous bed 19 is permanently installed on the inlet side of the intake plenum 12 so that the inflowing air is rectified and can be used as an operation bed when a worker works.

With this construction, since the porous bed 19 also has the effect of rectifying the turbulence of the inflowing air, it is permissible to install something that disturbs the flow to some extent on the upstream side. 17 can be permanently installed. Further, in the jack-up work in this case, since the porous floor 19 serves as an operation floor, only the jack 14 needs to be installed over the porous floor 19 in the compressor inlet casing, so that the workability is greatly improved.

FIG. 4 shows a modified example of FIG. 1, in which the jack seat 17 is installed in the intake duct 8 which is in communication with the intake plenum 12, and the turbulence of the inflowing air is kept away from the compressor inlet casing 15. It is intended to improve.

FIG. 5 is a modification of FIG. 2, in which the jack seat 17 is set in the pocket 18 provided in the intake duct 8, and the Q portion of FIG. 4 is enlarged.

FIG. 6 is a modification of FIG. 3, which is a permanent porous bed 19
Is installed between the intake plenum 12 and the intake duct 8, and the jack seat 17 is permanently provided on the wall surface of the intake duct 8 on the upstream side of the porous floor 19. This figure corresponds to part Q in FIG.

5 and 6, when the space between the jack seat 17 and the compressor inlet casing is large, the adjusting block 23 may be used as shown in the figures.

FIG. 7 shows a compressor inlet casing 15 utilizing the wall surface of the T-G mount 3 in a gas turbine power generation facility in which the arrangement of FIG. 14 in which the intake duct 8 is also used as the T-G mount 3 is adopted. The attachment method of the jack seat 17 for jacking up is shown. Ie intake plenum 1
2 is set so as to surround the opening 20 of the TG mount 3. The jack seat 17 is set on the vertical wall of concrete forming the opening of the T-G pedestal 3, and the jack 14 is installed on the jack seat 17 to jack up the compressor inlet casing 15. Even in this case, the same effects as those in FIGS. 1 and 4 can be obtained.

FIG. 8 shows a case where the jack seat 17 is used as a temporary facility which is set only when the compressor inlet casing is disassembled, and the R portion of FIG. 7 is enlarged. A pocket 18 is provided on a vertical wall of concrete forming the opening of the T-G mount 3, a jack seat 17 is set in this pocket 18, and the jack 1 is placed on the jack seat 17.
4 is installed and the compressor inlet casing 15 is jacked up. This has the same effect as that of FIG. 2 and FIG. In any of the examples, if the pocket 18 is attached with a cover after the jack seat 17 is removed,
It is good without disturbing the flow of inflowing air.

FIG. 9 shows a case where the jack seat 17 is used as a temporary facility as in the case of FIG. 8, and the R portion of FIG. 7 is enlarged. An embedded metal fitting 21 is previously embedded in a vertical wall surface of concrete forming the opening of the T-G pedestal 3 when the concrete is placed, and the jack seat 17 is attached thereto by bolting. In order to make it easy to attach the jack seat 17, if the projection 22 that does not disturb the flow is attached to the embedded metal article 21, the jack seat 17 can be temporarily placed on the projection 22 and the setting can be facilitated.

In FIG. 10, a porous floor 19 is installed between the intake plenum 12 and the TG mount 3, and the embedded hardware 21 is embedded in the vertical wall of concrete of the TG mount 3 in advance.
The jack seat 17 is permanently attached by welding, and the R portion in FIG. 7 is enlarged, and has the same effect as in FIGS. 3 and 6.

[0033]

As described above, according to the present invention, even if a gas turbine of a lower intake system in which an air passage for supplying air to the gas turbine air compressor is located below the air compressor, A jack seat is provided on the lower wall surface of the plenum, and the jack-up work is performed through this jack seat, so the base part on which the jack is installed is firm and stable installation, thus improving workability. Stable jack-up can be performed and safety can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a gas turbine showing an embodiment of a jack-up device of the present invention.

FIG. 2 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 3 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 4 is a vertical sectional side view of a gas turbine showing another embodiment of the jack-up device of the present invention.

FIG. 5 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 6 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 7 is a vertical sectional side view of a gas turbine showing another embodiment of the jack-up device of the present invention.

FIG. 8 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 9 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 10 is a vertical sectional side view showing another embodiment of the jack-up device of the present invention.

FIG. 11 is a side view showing a conventional upper intake gas turbine power generation facility.

FIG. 12 is a side view of gas turbine equipment showing a conventional jack-up device.

13 is a cross-sectional view taken along the line AA of FIG.

FIG. 14 is a side view of a lower intake type gas turbine power generation facility to which the jack-up device of the present invention is applied.

FIG. 15 is a side view of a lower intake type gas turbine power generation facility to which the jack-up device of the present invention is applied.

[Explanation of symbols]

1 ... Gas turbine / generator building, 2 ... Floor surface, 3 ... Gas turbine / generator stand, 4 ... Gas turbine, 5 ... Generator, 6 ... Auxiliary room, 7 ... Air inlet, 8 ... Intake Duct, 9
... filter, 10 ... air compressor, 11 ... steam turbine,
12 ... intake plenum, 13 ... combustor, 14 ... jack,
15 ... Compressor inlet casing, 16 ... Bottom plate, 17 ... Receiving seat (jack seat), 18 ... Pocket, 19 ... Perforated floor, 2
0 ... Opening, 21 ... Embedded metal object, 22 ... Protrusion, 23 ... Block.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area F16M 5/00 F16M 5/00 B

Claims (14)

[Claims] 1. An opening in which an air passage for supplying air to a gas turbine air compressor is located below the air compressor, and for supplying air from the air passage to the air compressor is provided in a gas turbine mount. In a gas turbine facility that is formed so as to be performed through an intake plenum that is arranged in parallel with the air compressor and the air compressor, a jack receiving seat for jacking up a gas turbine casing is provided on a lower wall surface of the intake plenum. Gas turbine equipment characterized by 2. An opening in which an air passage for sending air to the gas turbine air compressor is located below the air compressor, and for sending air from the air passage to the air compressor is provided in a gas turbine frame. In a gas turbine facility formed so as to be performed via an intake plenum that is arranged in parallel with the air compressor and the air compressor, a jack receiving seat for jacking up a gas turbine casing is temporarily installed on a wall surface of the intake plenum. Gas turbine equipment characterized by being installed as. 3. An opening in which an air passage for sending air to the gas turbine air compressor is located below the air compressor, and for sending air from the air passage to the air compressor is provided in a gas turbine frame. In a gas turbine facility configured to be performed through an air intake plenum that is provided in parallel with the gas turbine casing and the air compressor, a gas turbine casing is jacked on a side wall surface of an opening provided in the gas turbine mount. The gas turbine equipment is characterized in that the jack receiving seat to be raised is detachably attached. 4. An opening in which an air passage for supplying air to the gas turbine air compressor is located below the air compressor, and for supplying air from the air passage to the air compressor, the gas turbine frame is provided. In a gas turbine facility configured to be performed through an air intake plenum that is provided in parallel with a gas turbine casing and an air compressor, a gas turbine casing is jacked on a side wall surface of an opening provided in the gas turbine mount. A gas turbine facility characterized in that the jack seat that is to be upgraded is attached as a permanent facility. 5. An opening in which an air passage for supplying air to the gas turbine air compressor is located below the air compressor, and for supplying air from the air passage to the air compressor is provided in a gas turbine frame. In a gas turbine facility that is configured to operate through an air intake plenum that is installed side by side with the air compressor and the air compressor, a part of the gas turbine pedestal is made into a tunnel structure on a concrete wall that also serves as a duct. , Gas turbine equipment characterized by having a jack receiving seat for jacking up the gas turbine casing. 6. The gas turbine equipment according to claim 5, wherein the seat for receiving the jack is mounted as a temporary equipment in a pocket provided on a concrete wall surface. 7. The gas turbine equipment according to claim 5, wherein the seat for receiving the jack is attached as temporary equipment to an embedded metal object set in advance on a concrete wall surface. 8. The gas turbine equipment according to claim 5, wherein the seat for receiving the jack is attached to an embedded metal object preset on a wall surface of concrete by welding. 9. The gas turbine equipment according to claim 5, 6, 7 or 8, wherein a seat for receiving the jack is provided on a concrete wall surface close to the air compressor side. 10. A seat for receiving the jack is provided on a concrete wall surface close to the air compressor side,
The gas turbine facility according to claim 5, 6, 7 or 8, wherein a porous bed is provided on the upper part thereof. 11. An opening in which an air passage for supplying air to the gas turbine air compressor is located below the air compressor, and for supplying air from the air passage to the air compressor is provided in a gas turbine frame. In a gas turbine facility formed so as to be performed through an intake plenum that is arranged in parallel with the air compressor and the air compressor, a wall surface of an intake duct that engages with the intake plenum receives a jack for jacking up a gas turbine casing. Gas turbine equipment characterized by having a seat. 12. The gas turbine equipment according to claim 11, wherein the jack seat is integrally attached to the wall surface of the intake duct by welding. 13. The gas turbine equipment according to claim 11, wherein the jack seat is detachably attached to the wall surface of the intake duct. 14. An opening in which an air passage for supplying air to the gas turbine air compressor is located below the air compressor, and for supplying air from the air passage to the air compressor is provided in a gas turbine frame. In a method for jacking up a gas turbine facility, which is formed so as to be performed through a portion, when a jack up of the gas turbine casing, a receiving seat that receives a reaction force of the jack is fixed to a sidewall of the opening, A method for jacking up a casing of gas turbine equipment, wherein a jack is arranged on the receiving seat to carry out a jack-up work of a gas turbine casing, and after the work is completed, the receiving seat is removed.