JPH0510703U - Condenser for axial exhaust steam turbine - Google Patents

Abstract

(57) [Abstract] [Purpose] To absorb the thermal expansion between the turbine and the condenser in the axial exhaust type condensing turbine. [Structure] A flexible plate (5d) connects between an exhaust connection pipe (4) for introducing the exhaust gas of a steam turbine and a condenser barrel (5).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a condenser connected to an axial exhaust type condensing turbine that drives a centrifugal compressor, a blower, a pump and the like.

[0002]

[Prior Art]

 5 is a side view showing an example of the arrangement of a conventional axial exhaust type condensing turbine and a condenser, FIG. 6 is a cross-sectional view of FIG. 5, FIG. 7 is a front view of the condenser in FIG. FIG. 8 is a − cross-sectional view of FIG. 7.

Conventionally, as shown in these drawings, the flexible structure is provided directly on the exhaust connection pipe (4) connecting the turbine casings (2) and (3) and the condenser (5), or before or after the flexible pipe. By mounting the joint (4a), the thermal expansion between the turbine casings (2) and (3) and the condenser (5) was absorbed. That is, the turbine has a structure in which the turbine low-pressure casing (3) is used as a fixed point and thermal expansion is released to the front side. On the other hand, the condenser (5) is generally fixed for installation. A flexible joint (4a) was required to absorb the thermal expansion between the two fixing points. The black circles in FIG. 5 indicate fixed points and the black arrows indicate movement due to thermal expansion (the same applies to FIG. 9 described later).

Therefore, as shown in the side view of FIG. 9 and the XX cross section of FIG. 9, it is conceivable to fix the front bearing stand (1) of the axial exhaust steam turbine. In this case, it is necessary to absorb a larger thermal expansion than in the cases shown in FIGS. If the number of peaks of the flexible joint is increased in order to absorb a large amount of thermal expansion, the flexible joint will buckle due to the pressure difference between the inside and outside of the exhaust connection pipe. Therefore, as shown in FIG. 9, a plurality of flexible joints (4a) are attached.

[0005]

[Problems to be Solved by the Invention] Conventionally, since the flexible joint (4a) is provided in the exhaust connection pipe (4), the cost is inevitably high. The present invention relates to a means for absorbing such a large amount of thermal expansion as described above, and adds the absorption capacity to the condenser itself, rather than the conventional measures for the exhaust connection pipe and before and after it.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned conventional problems, the present invention is characterized in that a flexible plate is connected between an exhaust connection pipe for introducing the exhaust gas of a steam turbine and a condenser shell, for an axial exhaust steam turbine. It proposes a condenser.

[0007]

[Action]

 The steam inlet nozzle of the condenser has a smaller opening than the condenser body. By utilizing the difference in size between the body and the steam inlet nozzle, the structure will absorb the thermal expansion. That is, the flexible plate is made of a relatively thin steel plate at the connecting portion between the steam inlet nozzle and the body. Thermal expansion is absorbed by this flexible plate.

[0008]

【Example】

 1 is a front view of a condenser showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. In this embodiment, a Z-shaped step is provided between the condenser body (5a) and the nozzle (5b), and the flat plate (5d) in this part is a flexible plate.

Next, FIG. 3 is a cross-sectional view of a condenser showing a second embodiment of the present invention. In this embodiment, the effect is further increased by attaching the flexible plate (5f) also to the nozzle flange (5e).

Next, FIG. 4 shows an embodiment in which a flexible plate (4f) is attached to the flange (4e) of the exhaust connection pipe (4) in addition to that of FIG. Show.

[0011]

As described above, in the structure that absorbs the displacement by using the flat plate as the flexible plate, the absorbable displacement can be easily obtained from the material mechanics as a plate problem.

[Brief description of drawings]

FIG. 1 is a front view of a condenser showing an embodiment of the present invention.

2 is a cross-sectional view of FIG.

FIG. 3 is a cross-sectional view of a condenser showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a condenser showing a third embodiment of the present invention.

FIG. 5 is a side view showing an example of arrangement of a conventional axial exhaust type condensing turbine and a condenser.

6 is a cross-sectional view of FIG.

FIG. 7 is a front view of the condenser shown in FIG.

FIG. 8 is a − sectional view of FIG. 7.

FIG. 9 is a side view showing another example of the arrangement of the conventional axial exhaust type condensing turbine and the condenser.

10 is a cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Front bearing stand 2 Turbine high-pressure casing 3 Turbine low-pressure casing 3a Low-pressure casing horizontal joint flange (lower casing side) 3b Key support 4 Exhaust connecting pipe 4a Flexible joint 4e Exhaust connecting pipe flange 4f Flexible plate 5 Condensate Condenser 5a Condenser body 5b Condenser inlet nozzle 5c Condenser body connecting plate 5d, 5f Flexible plate 5e Condenser inlet nozzle flange 6 Base plate 6a Front bearing stand support 6b Low pressure vehicle compartment support leg 6c Support Stand 6d Key support 7 Front bearing stand fixed key 8 Low pressure vehicle center center holding key 9 Vertical flexible plate 10 Flexible plate 30 Driven machine

Claims (1)

[Claims for utility model registration] Claims: 1. An exhaust pipe for an axial exhaust steam turbine, characterized in that a flexible plate is connected between an exhaust connection pipe for introducing exhaust gas of the steam turbine and a condenser body. Water bottle.