JP2013164245A - Steam condenser - Google Patents

Abstract

A condenser that reduces vibration is provided.
A condenser according to an embodiment is a condenser for condensing steam flowing into the interior by heat exchange with cooling water, the condenser cylinder into which steam flows, and the condenser cylinder. A first heat transfer tube bundle through which cooling water for cooling the steam in the passage flows, and a first water chamber in which the inside is in fluid communication with the inside of the first heat transfer tube bundle and attached to the outer surface of the condenser body And a second heat transfer tube bundle provided as a separate system from the first heat transfer tube bundle, in which cooling water for cooling the steam in the condenser body flows, and the inside of the second heat transfer tube bundle A second water chamber attached to the outer surface of the condenser body to which the first water chamber is attached, and a space between the first water chamber and the second water chamber. A displacement suppression member.
[Selection] Figure 2

Description

  The present invention relates to a condenser for condensing steam that has driven a power generation steam turbine with cooling water.

  In thermal power plants and nuclear power plants, condensers that condense steam using cooling water such as seawater are used. The steam generated by the boiler, nuclear reactor, or steam generator is used to drive the power generation steam turbine, and the driven steam is returned to the water through the condenser.

  In the condenser, steam flows into the condenser body, and the steam is cooled and condensed by a bundle of many heat transfer tubes (heat transfer tube bundle) provided in the condenser body. Water chambers are arranged at both ends of the heat transfer tube bundle, and cooling water flows into and out of the heat transfer tube bundle.

  In recent years, power plant output has increased and the amount of steam to condense has increased, and the flow rate of cooling water has also increased. For this reason, the heat transfer tube / water chamber may vibrate. Particularly, in a so-called resonance state (the flow of cooling water coincides with the natural vibration of the heat transfer tube / water chamber), a large fluctuating fluid force is generated. As a result, a large vibration occurs in the entire condenser, which may damage not only the condenser but also surrounding equipment.

  Here, in order to prevent an increase in density wave vibration in the heat transfer tube, a heat exchanger in which an orifice is provided in a part of the heat transfer tube is disclosed (see Patent Document 1). An apparatus for suppressing vibration of a line-like object such as a pipe is disclosed (see Patent Document 2).

  However, the technique disclosed in Patent Document 1 is difficult to apply to a condenser having a large cooling water flow rate because the orifice generates a large flow resistance. The device disclosed in Patent Document 2 is difficult to attach to a large-diameter structure such as a water chamber.

JP 2006-162339 A JP 2010-237212 A

  An object of this invention is to provide the condenser which reduced the vibration.

  The condenser of the embodiment is a condenser that condenses the steam flowing into the interior by exchanging heat with cooling water, and the condenser cylinder into which steam flows, and the steam in the condenser cylinder. A first heat transfer tube bundle through which cooling water for cooling flows, a first water chamber whose inside is in fluid communication with the inside of the first heat transfer tube bundle, and attached to an outer surface of the condenser body; A heat transfer tube bundle is provided as a separate system, and a second heat transfer tube bundle through which cooling water for cooling the steam in the condenser body flows, and the inside is in fluid communication with the second heat transfer tube bundle. A second water chamber attached to the outer surface of the condenser body to which the first water chamber is attached; a displacement suppressing member provided between the first water chamber and the second water chamber; , Provided.

It is a front view showing the condenser 10 which concerns on 1st Embodiment. It is a top view showing the condenser 10 which concerns on 1st Embodiment. It is a side view showing the condenser 10 which concerns on 1st Embodiment. It is a top view showing condenser 10x concerning a comparative example. It is a side view showing the condenser 10x which concerns on a comparative example. It is the figure which modeled the condenser 10x of the comparative example. It is a figure showing a Helmholtz resonator. It is a graph showing the vibration state of the condenser 10x. It is a side view showing the condenser 10a of an example of 2nd Embodiment. It is a side view showing the condenser 10b of the other example of 2nd Embodiment. It is a side view showing the condenser 10c which concerns on 3rd Embodiment. It is a side view showing the condenser 10d which concerns on 4th Embodiment. It is an enlarged view of the supporting member 21c between water chamber parts which concerns on 4th Embodiment. It is an enlarged view of the supporting member 21d between water chamber parts which concerns on 5th Embodiment. It is a side view showing the condenser 10e which concerns on 6th Embodiment. It is an enlarged view of the supporting member 21e between water chamber parts which concerns on 6th Embodiment. It is a side view showing condenser 10f concerning a 7th embodiment. It is an enlarged view of the supporting member 21f between water chamber parts which concerns on an example of 7th Embodiment. It is an enlarged view of the supporting member 21f between water chamber parts which concerns on the other example of 7th Embodiment. It is a side view showing the condenser 10g which concerns on the modification 1. FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings.
(First embodiment)
1 to 3 are a front view, a top view, and a side view showing the condenser 10 according to the first embodiment.
The condenser 10 includes a condenser body 11, a system A heat transfer tube bundle 12A, a system B heat transfer tube bundle 12B, a system A inlet water chamber portion 13A, a system A outlet water chamber portion 14A, a system B inlet water chamber portion 13B, A B system outlet water chamber 14B, an A system cooling water inlet pipe 15A, an A system cooling water outlet pipe 16A, a B system cooling water inlet pipe 15B, and a B system cooling water outlet pipe 16B are installed on the foundation 17.

  The condenser body 11 has an internal space into which steam from the steam turbine is introduced. The steam that has flowed into the internal space is cooled and condensed by the A-system heat transfer tube bundle 12A and the B-system heat transfer tube bundle 12B, and is returned to the boiler or reactor as water.

  Inside the condenser body 11, an A system heat transfer tube bundle 12A and a B system heat transfer tube bundle 12B for cooling the steam are arranged side by side. The A system heat transfer tube bundle 12 </ b> A and the B system heat transfer tube bundle 12 </ b> B penetrate the condenser body 11, and both ends of the A system heat transfer tube bundle 12 </ b> A and B system heat transfer tube bundle 12 </ b> B are arranged outside the condenser body 11. The Each of the A-system heat transfer tube bundle 12A and the B-system heat transfer tube bundle 12B is a bundle of a plurality of heat transfer tubes, and only a few are shown for convenience of illustration, but usually a set of many thousands of thin tubes Is the body.

  A system inlet water chamber portion 13A, A system outlet water chamber portion 14A, and a pair of water chamber portions are connected to both ends of the A system heat transfer tube bundle 12A. The A-system inlet water chamber portion 13 </ b> A and the A-system outlet water chamber portion 14 </ b> A are disposed outside the condenser body 11 and connected to the condenser body 11. A system cooling water inlet piping 15A is connected to the A system inlet water chamber 13A, and A system cooling water outlet piping 16A is connected to the A system outlet water chamber 14A. By a cooling water pump (not shown), the A system inlet water chamber portion 13A, the A system heat transfer tube bundle 12A, and the A system outlet water chamber portion 14A are passed through the A system cooling water inlet piping 15A and the A system cooling water outlet piping 16A. In turn, cooling water is supplied.

  Similarly to the A system, a B system inlet water chamber section 13B, a B system outlet water chamber section 14B, and a pair of water chamber sections are connected to both ends of the B system heat transfer tube bundle 12B. The B system inlet water chamber 13B and the B system outlet water chamber 14B are arranged outside the condenser cylinder 11 and connected to the condenser cylinder 11. A B-system cooling water inlet pipe 15B is connected to the B-system inlet water chamber section 13B, and a B-system cooling water outlet pipe 16B is connected to the B-system outlet water chamber section 14B. By a cooling water pump (not shown), the B system inlet water chamber section 13B, the B system heat transfer pipe bundle 12B, and the B system outlet water chamber section 14B are connected via the B system cooling water inlet pipe 15B and the B system cooling water outlet pipe 16B. In turn, cooling water is supplied.

  A system heat transfer tube bundle 12A, B system heat transfer tube bundle 12B, A system inlet water chamber portion 13A, A system outlet water chamber portion 14A, B system inlet water chamber portion 13B, and B system outlet water chamber portion 14B are condensers. It is installed on the foundation 17 through the trunk 11.

  The A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B are arranged side by side. The A-system inlet water chamber portion 13A and the B-system outlet water chamber portion 14B are arranged side by side.

  In FIG. 2, the A system cooling water inlet pipe 15A and the A system cooling water outlet pipe 16A, and the B system cooling water inlet pipe 15B and the B system cooling water outlet pipe 16B are installed antisymmetrically. The layout varies from plant to plant and is not limited to this.

In the condenser 10 according to the present embodiment, the inter-water chamber support member 21 is disposed between the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B (between opposing water chamber wall surfaces), as described later. Furthermore, the variation (vibration) of the displacement between the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B is suppressed.
In addition, the component of the condenser 10 containing the support member 21 between water chamber parts can be comprised from metals, such as stainless steel.

(Comparative example)
4 and 5 are a top view and a side view showing the condenser 10x according to the comparative example.
The condenser 10x does not have the inter-water chamber support member 21. Therefore, between the A-system water chamber (A-system inlet water chamber 13A, A-system outlet water chamber 14A) and the B-system water chamber (B-system inlet water chamber 13B, B-system outlet water chamber 14B). Displacement fluctuation (vibration) is likely to occur.

  As described above, the cooling water is supplied to the bundle of heat transfer tubes (the A heat transfer tube bundle 12A and the B heat transfer tube bundle 12B) as follows. That is, a large number of inlet water chambers (A system inlet water chamber 13A, B system inlet water chamber 13B) connected to large diameter pipes (A system cooling water inlet pipe 15A, B system cooling water inlet pipe 15B) Water is passed through heat transfer tubes (A system heat transfer tubes, B system heat transfer tubes), which are narrow tubes, and cooling water is collected in the outlet water chambers (A system outlet water chamber 14A, B system outlet water chamber 14B). It flows through the bore pipe (A-system cooling water outlet pipe 16A, B-system cooling water outlet pipe 16B).

  At this time, a large number of transmissions are made to the inlet water chamber (A system inlet water chamber 13A, B system inlet water chamber 13B) / outlet water chamber (A system outlet water chamber 14A, system B outlet water chamber 14B). A large fluid force is applied to distribute / aggregate the water flow to or from the heat transfer tubes. This fluid force increases as the coolant flow rate and flow velocity increase.

  In recent years, power plant output has increased and the amount of steam to condense has increased, and the flow rate of cooling water has also increased. For this reason, the heat transfer tube / water chamber may vibrate. Particularly, in a so-called resonance state (the flow of cooling water coincides with the natural vibration of the heat transfer tube / water chamber), a large fluctuating fluid force is generated. As a result, a large vibration occurs in the entire condenser, which may damage not only the condenser but also surrounding equipment.

(Vibration suppression by the inter-water chamber support member 21)
Such a vibration is reduced in the condenser 10 according to the present embodiment. In particular, even when a large fluid force is applied due to an increase in the cooling water flow rate or resonance with acoustic vibration of the water chamber / heat transfer tube, or even when resonance with wall vibration of the water chamber occurs, It is possible to prevent the vibration from becoming large.

  In this embodiment, the inter-water chamber support member 21 restrains the displacement between the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B (displacement between water chamber portions) within a certain range. . It will be explained that the restraint of the displacement between the water chambers is effective for suppressing the vibration.

  FIG. 6 is a model diagram in which the vibration state of the condenser 10x of the comparative example is modeled. A system water chamber (A system inlet water chamber 13A, A system outlet water chamber 14A) and B system water chamber. This corresponds to the simultaneous equations representing the relationship between the displacements x1, x2, and x3 of the section (B system inlet water chamber section 13B, B system outlet water chamber section 14B) and the condenser body 11. That is, the A-system water chamber (mass m1) is connected to the condenser body 11 via the spring element (spring constant k1) and the damping element (damping coefficient c1). Similarly, the B-system water chamber (mass m2) is connected to the condenser body 11 via a spring element (spring constant k2) and a damping element (damping coefficient c2).

  Here, it is assumed that the A-system inlet water chamber 13A and the A-system outlet water chamber 14A are integrally displaced as the A-system water chamber (displacement x1), and the B-system inlet water chamber 13B and the B-system outlet water. The chamber 14B is integrally displaced as a B-system water chamber (displacement x2), so that the model is simplified.

  A system water chamber (A system inlet water chamber 13A, A system outlet water chamber 14A) / fluid part of heat transfer tube (heat transfer tube bundle 12A), B system water chamber (B system inlet water chamber 13A, B The fluid portion of the system outlet water chamber 14B) / heat transfer tube (heat transfer tube bundle 12B) is simply formed by a tube having a cross-sectional area A and a length L connecting the two volumes V shown in FIG. Modeled by a Helmholtz resonator. That is, the volume V corresponds to each volume of the inlet water chamber / outlet water chamber, and the pipe to be connected corresponds to the heat transfer tube. Therefore, the length L is the length of the heat transfer tube, and the cross-sectional area A is the total heat transfer tube. Corresponds to the cross-sectional area.

At this time, the mass at the Helmholtz resonator of FIG. 7 is expressed as a product of ρLA where the fluid density is ρ, and the spring constant is expressed as (2A ² c ² / V) * ρ where the fluid sound velocity is c. (RD Blevins, Formulas for Natural Frequency and Mode Shape, Krieger).

When the displacement amount of the fluid part of the A-system water chamber / heat transfer tube is x4, the mass m4 is ρLA, and the A-system water chamber is passed through the spring element (spring constant k4) and the damping element (damping coefficient c4). / Connected to the structural part of the heat transfer tube. At this time, the spring constant k4 is given by “(2A ² c ² / V) * ρ”.

  Similarly, if the displacement amount of the fluid part of the B-system water chamber / heat transfer tube is x5, the mass m5 and the spring constant k5 are set. For the damping coefficient, it is ideal to use the measured value in the impact test, but the knowledge of fluid / structure coupled vibration (CJ Nederveen, J.-P. Dalmont, Pitch and leve changes in organ pipes due to wall It is known from resonances, J. Sound and Vibration 271 (2004) 227-239) that the damping constant of the fluid system is generally smaller than the damping constant of the structural system, and here the damping ratio is set to 1%.

  The coupled equations composed of the variables x1 to x5 configured as described above add f4 and f5 to the fluid system of the system A water chamber / heat transfer tube and the system B water chamber / heat transfer tube as fluid forces accompanying flow, respectively. Then, it is expressed by the following equations (1) to (5).

Assuming that the fluid forces f4 and f5 are self-excited vibrations in which large vibrations are generated by fluid-structure coupled vibrations, and assuming that a typical van der Pol type fluid force is generated as self-excited vibrations, D ₄ , The following formula is established with x ₄₀ , D ₅ and x ₅₀ as constants.

  FIG. 8 shows the solution of the simultaneous equations configured in this way under appropriate conditions, and shows the displacement x1 of the A-system water chamber / heat transfer tube and the B-system water chamber / heat transfer tube x2. What is important here is that the response of the displacement A1 of the A-system water chamber / heat transfer tube of the condenser 10x of the comparative example and the response of the B-system water chamber / heat transfer tube x2 are synchronized in opposite phases. Thus, it is shown that when the A-system water chamber / heat transfer tube and the B-system water chamber / heat transfer tube are coupled via the condenser body 11, they vibrate in the opposite phase synchronously. This is called phase synchronization.

  In this embodiment, as described above, the displacement between the water chambers is constrained within a certain range, so that the A-system water chamber displacement and the B-system water chamber displacement as described above are synchronized in opposite phases. It is not allowed to fluctuate. For this reason, phase-synchronized vibration can be effectively prevented.

  As described above, in the condenser in which the A-system water chamber / heat transfer tube and the B-system water chamber / heat transfer tube are coupled via the condenser cylinder 11, large vibrations are generated in opposite phases. Therefore, restraining displacement between the water chambers effectively suppresses vibration.

  In the above description, the van der Pol type fluid force is generated. However, the same phase-synchronized vibration can be prevented even if the fluid force is not a van der Pol type. When the two water chamber / heat transfer tube systems are fixed to the foundation via the condenser body 11, phase-synchronized vibration may occur under appropriate conditions. The condenser 10 according to the embodiment can prevent phase-synchronized vibration.

  As shown in FIG. 5, the inter-water chamber supporting member 21 is installed at a position where the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B face each other on the side surfaces. When the A-system water chamber section and the B-system water chamber section vibrate in synchronism with each other in phase with each other, the inter-water chamber support member 21 that suppresses the displacement between the water chamber sections within a certain range is It can be seen that the vibrations of the displacement x1 of the water chamber and the displacement x2 of the B-system water chamber are suppressed.

  According to the present embodiment, even when the two water chamber / heat transfer tube systems vibrate in synchronism with the acoustic vibration of the water chamber / heat transfer tube, the inter-water chamber support member 21 is provided with the water chamber. The displacement between the parts can be limited to a certain range, and the large vibration of the water chamber part can be suppressed.

Although not shown in FIG. 3, even if the inter-water chamber support member 21 is provided between the A-system inlet water chamber portion 13A and the B-system outlet water chamber portion 14B, the same vibration suppressing effect can be obtained. It is clear from the explanation.
If the inter-water chamber support member 21 is installed between the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B, and between the A-system inlet water chamber portion 13A and the B-system outlet water chamber portion 14B, 2 It is clear from the above explanation that a double vibration suppression effect can be obtained.

(Second Embodiment)
A second embodiment will be described. 9 and 10 show the configurations of the condensers 10a and 10b of this embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the condenser 10a, a portion corresponding to the belly of the primary vibration mode M1a of the side plate of the A system outlet water chamber portion 14A (near the center of both ends of the side plate of the A system outlet water chamber portion 14A) and the B system inlet water chamber portion 13B. The inter-water chamber support member 21 is provided in a portion corresponding to the belly of the primary vibration mode M1b of the side plate (near the center of both ends of the side plate of the B-system inlet water chamber portion 13B). Both ends are arranged).

  As explained in the first embodiment, when the A-system water chamber section and the B-system water chamber section vibrate synchronously in the opposite phase, the two chambers in the antinodes are synchronized between the water chamber sections during synchronous vibration. Large variation in displacement. For this reason, the support member 21 between water chamber parts provided in this position can suppress effectively the displacement of the fluctuation between water chamber parts.

  In the condenser 10b, a portion corresponding to the antinode of the secondary vibration mode M2a of the side plate of the A system outlet water chamber portion 14A (one-fourth of the distance between one end and both ends of the side plate of the A system outlet water chamber portion 14A). Near the location) and a portion corresponding to the antinode of the secondary vibration mode M2b of the side plate of the B system inlet water chamber portion 13B (near the location of 1/4 of the distance between one end and both ends of the side plate of the B system inlet water chamber portion 13B) ) Are provided with inter-water chamber support members 21a, 21b (both ends of the inter-water chamber support members 21a, 21b are disposed). Even in this case, the fluctuation of the displacement between the water chambers can be effectively suppressed as in the case of the primary vibration mode.

  Whether the installation position of the inter-water chamber support member 21 is set to the antinode of the primary vibration mode or the antinode of the secondary vibration mode is determined as follows. That is, among the primary vibration mode and the secondary vibration mode, the vibration mode of the inlet / water chamber fluid system described in the first embodiment (that is, the mode having a frequency that matches the Helmholtz resonance frequency shown in FIG. 8). ) Is selected.

According to the present embodiment, since the inter-water chamber support member 21 is provided at the position of the antinode of the primary vibration mode or the secondary vibration mode of the water chamber side plate where the displacement between the water chambers becomes large, It is possible to suppress the vibration of the parts, and thus the vibration of the condensers 10a and 10b.
There are two antinodes in the secondary vibration mode, and in the condenser 10b, the inter-water chamber support members 21a and 21b are respectively provided on the two antinodes. An inhibitory effect is obtained.

(Third embodiment)
A third embodiment will be described. FIG. 11 shows the configuration of the condenser 10c of this embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The condenser 10c has a suspension support part 22 attached to the upper part of the A-system outlet water chamber part 14A, a suspension 23 (wire), and a support member 21 between water chambers suspended by the suspension 23. .

  The inter-water chamber support member 21 of this embodiment is sandwiched between the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B, and mainly prevents the displacement between the water chamber portions from becoming smaller than a certain value.

  Further, as in the second embodiment, by adjusting the length of the suspension 23 without pre-determining the position of the antinode of the vibration mode, the inter-water chamber support member 21 is adjusted to the height having the most vibration suppression effect. Can be installed.

  In FIG. 11, the suspension support portion 22 is provided in the A-system outlet water chamber portion 14A, but may be provided in the B-system inlet water chamber portion 13B. Alternatively, the suspension support portion 22 may be provided across both the A-system outlet water chamber portion 14 </ b> A and the B-system inlet water chamber portion 13 </ b> B, and the inter-water chamber support member 21 may be suspended by the suspension 23. It is important that the support member 21 between the water chambers is suspended by a suspension 23 whose length can be adjusted from above the support member 21 between the water chambers.

  Further, by using a separate suspension from the suspension 23, the inter-water chamber support member 21 is provided between the A-system inlet water chamber portion 13A and the B-system outlet water chamber portion 14B, and the A-system inlet water chamber portion 13A The displacement variation between the B-system outlet water chambers 14B may be suppressed as in the first embodiment.

  According to the present embodiment, the inter-water chamber support member 21 is provided at the height of the water chamber side plate where the inter-water chamber displacement increases. For this reason, the support member 21 between water chamber parts can be provided in the optimal position for vibration suppression of the water chamber part side plate, and the vibration of the condenser 10c can be suppressed.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 12 shows the configuration of the condenser 10d of this embodiment. FIG. 13 is an enlarged view of the inter-water chamber support member 21c. The same components as those in the first, second, and third embodiments are denoted by the same reference numerals, and redundant description is omitted.

  This embodiment is a configuration example of the inter-water chamber support member 21, and the inter-water chamber support member 21 is screwed at both ends so that nuts (female screw members) 212, 213 and nuts 212, 213 are attached to both ends. Is provided with a bolt (male screw member) 211. By rotating the nuts 212 and 213 around the axis of the bolt 211, the length L of the inter-water chamber support member 21 can be adjusted (functions as an adjustment mechanism that allows the length to be adjusted).

  In the present embodiment configured as described above, since the length L of the support member 21 between the water chambers can be expanded and contracted, the support between the water chambers is supported even after the condenser 10d is completed and the operation is started. The member 21 can be easily installed.

  FIG. 12 shows a situation in which the inter-water chamber support member 21c is suspended by the suspension support portion 22 and the suspension hand 23, but the fluctuation range of the displacement between the water chamber portions is small, and the inter-water chamber support member 21 is If there is no fear of dropping, the suspension support portion 22 and the suspension 23 may be omitted.

  According to the present embodiment, since the water chamber portion supporting member 21c is provided at the height of the water chamber side plate where the displacement between the water chamber portions actually increases after the condenser is completed and the operation is started, The inter-water chamber support member 21c can be provided at an optimum position for suppressing the vibration of the water chamber side plate, and the vibration of the condenser 10d can be suppressed.

(Fifth embodiment)
Next, a fifth embodiment related to the present embodiment will be described. FIG. 14 shows the configuration of the inter-water chamber support member 21d of the condenser of this embodiment. Since the overall configuration of the condenser of this embodiment is the same as that of the fourth embodiment, the drawing is omitted. The same code | symbol is attached | subjected to the structure same as 1st-4th embodiment, and the overlapping description is abbreviate | omitted.

  In this embodiment, as shown in FIG. 14, the inter-water chamber support member 21d includes cylindrical structures (female members having recesses) 212a and 213a, columnar structures (male members having recesses) 211a, and positioning screws (fixed). Member) 214. Cylindrical structures (female members having recesses) 212a and 213a whose both ends are movable are inserted into columnar structures (male members having recesses) 211a. The cylindrical structures 212a and 213a are fixed to the columnar structure 211a by positioning screws (fixing members) 214 that fix the position.

  In the present embodiment configured as described above, the inter-water chamber support member 21d can expand and contract its length L in the same manner as in the fourth embodiment (functions as an adjustment mechanism that allows the length to be adjusted). ) Even after the condenser is completed and the operation is started, the inter-water chamber support member 21 can be easily installed.

  Here, as in FIG. 12, it is assumed that the support member 21 between the water chambers is suspended by the suspension support part 22 and the suspension 23, but the fluctuation range of the displacement between the water chambers is small, and the water chamber part When there is no fear that the intermediate support member 21 falls, the suspension support part 22 and the suspension 23 may be omitted.

  According to this embodiment, after the condenser is completed and the operation is started, the inter-water chamber support member 21d is provided at the height of the water chamber side plate where the displacement between the water chambers actually increases. For this reason, the support member 21d between water chamber parts can be provided in the optimal position for the vibration suppression of a water chamber part side plate, and the vibration of a condenser can be suppressed.

(Sixth embodiment)
Next, a sixth embodiment will be described. FIG. 15 shows the configuration of the condenser 10e of this embodiment. The same code | symbol is attached | subjected to the structure same as 1st-5th embodiment, and the overlapping description is abbreviate | omitted.

In the present embodiment, as shown in FIG. 15, the inter-water chamber support member 21e has a damper and can cope with a change in the distance L between the condenser water chambers. The inter-water chamber support member 21e includes a cylinder member 212b and a piston member 211b. A stopper 213b is disposed at the tip of the piston member 211b. The inter-water chamber support member 21e changes its length L by pushing and pushing the piston member 211b into the cylinder member 212b. A fluid (gas, liquid) is sealed between the cylinder member 212b and the piston member 211b, and the kinetic energy is converted into heat and attenuated by the resistance (damping force) of the fluid. As a result, static displacement is possible and dynamic displacement (vibration) can be suppressed. The damper functions as an adjustment mechanism that allows the length to be adjusted.
In addition to the damper, any member having such a function (static displacement possible, dynamic displacement suppression) can be used.

In the present embodiment configured as described above, the inter-water chamber support member 21e can extend and contract its length L as in the fourth embodiment. For this reason, even after the condenser 10e is completed and the operation is started, even when the length L is statically changed due to the thermal expansion of the condenser body 11 and the water chamber due to the operation of the condenser 10e. , There is no restraint. For this reason, excessive stress does not act on the members constituting the condenser 10e.
Further, in order to exert a displacement restraining force against dynamic vibration, the vibration of the condenser can be suppressed as shown in the first to fifth embodiments.

(Seventh embodiment)
Next, a seventh embodiment will be described. FIG. 17 shows the configuration of the condenser 10f of the present embodiment. The same code | symbol is attached | subjected to the structure same as 1st-6th embodiment, and the overlapping description is abbreviate | omitted. In this embodiment, as shown in FIG. 17, the inter-water chamber support member 21 is attached to ribs 25 and 26 provided on the water chamber wall.

  The ribs 25 and 26 are provided at the positions of the antinodes of the water chamber wall vibration mode estimated in advance as in the second embodiment, and holes for attaching the water chamber portion supporting member 21 with bolts or the like are provided. Have.

  18 and 19 show enlarged views of the inter-water chamber support member 21. FIG. 18 shows the case where the inter-water chamber support member 21d shown in the fifth embodiment is attached, and FIG. 19 shows the case where the inter-water chamber support member 21e shown in the sixth embodiment is attached. Yes. In either case, the ribs 25 and 26 and the water chamber support member 21 can be attached and detached with bolts or the like.

  The phase-synchronized vibration of the water chamber described in the first embodiment has a property that it is self-excited when the flow rate of the cooling water flowing through the water chamber / heat transfer tube is large. Therefore, although it does not occur at a normal cooling water flow rate, phase-locked vibration may occur only when a large amount of cooling water flow is passed in a short time for the purpose of cleaning or the like. In such a case, the vibration of the condenser 10f can be suppressed by attaching the inter-water chamber support member 21f only when the flow rate of the cooling water is increased.

  Since the support member 21f between the water chambers is removed when the flow rate of the cooling water is equal to or lower than the phase-synchronized vibration generation level, there is no concern about the damage of the support member 21f between the water chambers due to the secular change during the long-time attachment.

(Modification 1)
Modification 1 will be described. FIG. 20 shows a configuration of a condenser 10g according to the first modification. The same code | symbol is attached | subjected to the structure same as 1st-7th embodiment, and the overlapping description is abbreviate | omitted. As shown in FIG. 20, the condenser 10g has a water chamber inter-part support member 21f. The inter-water chamber support member 21f is a plate-like member, and extends the water chamber (the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B) over a long range in the vertical direction (height direction) of the side surface. To support. Here, it is supported by a part of the total length L in the height direction of the water chamber. On the other hand, you may support over the whole length direction full length L of a water chamber using the support member 21f between water chamber parts longer in the vertical direction.

  In 1st-7th embodiment, what contacts the side surface of a water chamber in a comparatively narrow range is used as the support member 21 between water chambers. On the other hand, as in this modification, the longitudinal direction (height direction) of the side surface of the water chamber may be supported in a wide range by using the vertically long support member 21f between the water chambers.

  In this way, if the water chambers are supported by the vertically long water chamber support member 21f, vibration can be effectively suppressed regardless of the position of the antinode in the vibration mode. For this reason, vibration can be effectively suppressed even when the vibration mode is not known in advance or when the vibration mode changes due to output fluctuation.

(Modification 2)
Modification 2 will be described. In the first to seventh embodiments, the A-system inlet water chamber portion 13A and the B-system outlet water chamber portion 14B are arranged opposite to each other, and the A-system outlet water chamber portion 14A and the B-system inlet water chamber portion 13B are opposed to each other. Are arranged. That is, the inlet water chamber portion and the outlet water chamber portion are arranged to face each other, and the inter-water chamber support member 21 is installed therebetween. In contrast, the inlet water chambers (A-system inlet water chamber 13A and B-system inlet water chamber 13B), and the outlet water-chambers (A-system outlet water chamber 14A and B-system outlet water chamber 14B) May be arranged opposite to each other, and the inter-water chamber support member 21 may be installed therebetween. In this case, the support member 21 between water chamber parts can be installed in any one or both of inlet water chamber parts, outlet water chamber parts.
As described above, even when the inlet water chamber portions and the outlet water chamber portions are arranged to face each other, the vibration can be suppressed by using the support member 21 between the water chamber portions.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Condenser 11 Condenser Body 12A System A Heat Transfer Tube Bundle 12B System B Heat Transfer Tube Bundle 13A System A Inlet Water Chamber Part 13B System B Inlet Water Chamber Part 14A System A Outlet Water Chamber Part 14B System B Outlet Water Chamber Part 15A A system cooling water inlet pipe 15B B system cooling water inlet pipe 16A A system cooling water outlet pipe 16B B system cooling water outlet pipe 17 Foundation 21 Water chamber support member 22 Suspension support part 23 Suspension hand 211 Bolt 212, 213 Nut 211a Cylindrical structure 212a, 213a Cylindrical structure 214 Positioning screw 25, 26 Rib

Claims (9)

A condenser that condenses steam flowing into the interior by heat exchange with cooling water,
A condenser barrel into which steam flows,
A first heat transfer tube bundle through which cooling water for cooling the steam in the condenser body flows;
A first water chamber, the interior of which is in fluid communication with the inside of the first heat transfer tube bundle and attached to the outer surface of the condenser body;
A second heat transfer tube bundle provided as a separate system from the first heat transfer tube bundle, through which cooling water for cooling the steam in the condenser body flows;
A second water chamber attached to the outer surface of the condenser body, the interior of which is in fluid communication with the second heat transfer tube bundle and to which the first water chamber is attached;
A displacement suppressing member provided between the first water chamber and the second water chamber;
Condenser comprising The first water chamber has a first side plate;
The second water chamber has a second side plate facing the first side plate;
The first and second displacement suppression members are respectively disposed on the antinodes of the primary or secondary vibration mode on the first side plate and on the antinodes of the primary or secondary vibration mode on the second side plate. The condenser of Claim 1 which has an edge part of this. A suspension support part attached to the first water chamber or the second water chamber;
A suspension hand having one end connected to the suspension support part and the other end connected to the displacement suppression member;
The condenser according to claim 1 or 2, further comprising: The condenser according to any one of claims 1 to 3, wherein the displacement suppressing member has an adjustment mechanism that allows the length thereof to be adjusted. The adjusting mechanism has a male screw member and a female screw member engaged with each other;
The condenser according to claim 4. The adjustment mechanism includes a male member and a female member each having a convex portion and a concave portion that engage with each other, and a fixing member that fixes the male member and the female member.
The condenser according to claim 4. The condenser according to claim 4, wherein the adjusting mechanism includes a damper. Further comprising first and second ribs connected to the first water chamber and the second water chamber,
The condenser according to any one of claims 1 to 7, wherein the displacement suppressing member is detachable from the first and second ribs.   The condenser according to claim 1, wherein the displacement suppressing member is a rectangular plate-like member arranged such that a longitudinal direction thereof is a height direction.

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