JP6099474B2 - Cabin, rotating machine, car assembly method - Google Patents

Description

  The present invention relates to a casing of a rotating machine such as a steam turbine and a gas turbine, a rotating machine, and a method of assembling the casing.

Rotating machines such as steam turbines and gas turbines are installed on the floor surface by a lower casing that opens upward and an upper casing that fits over the lower casing and closes the opening of the lower casing. A vehicle compartment is formed in which the rotating body is accommodated. The mating surface of the lower casing and the upper casing is basically formed by a horizontal plane parallel to the floor surface.
Here, in the high-pressure part of the steam turbine and the gas turbine, the interior of the vehicle has a higher pressure than the outside of the vehicle, so that it is necessary to prevent the steam and combustion gas in the vehicle from leaking to the outside. Further, in the low pressure part of the steam turbine, a condenser may be provided in the passenger compartment. In such a case, the passenger compartment is evacuated, so it is necessary to prevent the inflow of outside air from outside the passenger compartment. .

  Therefore, a sealing agent such as silicon sealant is applied to the mating surface of the lower casing with the upper casing. In the case of a steam turbine, an oil-based sealant such as linseed oil is used because the silicon sealant is hydrolyzed by moisture of the steam and the sealing performance is impaired.

  Patent Document 1 discloses a configuration in which a seal groove is formed on a mating surface of a lower casing and an upper casing, and an inner seal plate and an outer seal plate made of low alloy steel are provided in the seal groove. .

Japanese Patent No. 3631901

For example, welding may be performed when the lower casing is installed on the floor surface, and the mating surface of the lower casing may be deformed so as to swell up and down due to the influence of heat input of the welding. In addition, the lower casing and the upper casing may be deformed by heat generated in the passenger compartment during operation. Because of these factors, there is a possibility that the sealing performance at the mating surface of the lower casing and the upper casing may be impaired. Therefore, it is always desired to further improve the sealing performance at the mating surface.
An object of the present invention made there is to provide a casing, a rotating machine, and a method for assembling the casing, which can further improve the sealing performance at the mating surfaces of the upper casing and the lower casing.

The present invention employs the following means in order to solve the above problems.
That is, the passenger compartment according to the present invention includes an upper passenger compartment having an upper mating surface, a lower passenger compartment having a lower mating surface facing the upper mating surface, and the upper mating surface and the lower mating surface. A first seal portion made of an oil-based sealant that seals a gap between the upper mating surface and the lower mating surface, and an outer peripheral surface of the upper casing and an outer peripheral surface of the lower casing And a second seal portion that seals the joint of the upper mating surface and the lower mating surface from the outer peripheral side of the upper and lower casings.

In addition to the first seal portion that seals the gap between the upper mating surface and the lower mating surface, the second seal portion provides a joint between the upper mating surface and the lower mating surface on the outer peripheral side of the upper and lower casings. By sealing from above, the sealing performance at the joint between the upper compartment and the lower compartment can be further enhanced.
Further, by forming the first seal portion using an oil-based sealant such as linseed oil, the sealability of the passenger compartment can be secured even in the steam turbine.

  The second seal portion may include a sealant film made of a silicone sealant agent and a paint film made of a paint laminated so as to cover the sealant film.

Thus, high sealing performance can be ensured by making the second seal portion a laminated structure of a sealant film and a paint film.
Moreover, since a commercially available thing can be used for a silicone sealant agent and a coating material, and it is not necessary to prepare a dedicated item, cost reduction can be achieved.

  The second seal portion includes a seal member made of a rubber-based material or a silicone sealant disposed on an outer peripheral side of the joint of the upper mating surface and the lower mating surface, and an outer periphery of the upper casing. And a pressing member sandwiched between the surface and the outer peripheral surface of the lower casing.

Also by this, the sealing performance in the second seal portion can be enhanced.
In addition, as a sealing member made of a rubber-based material or a silicone sealant, a commercially available one can be used, and it is not necessary to prepare a dedicated product, so that the cost can be reduced.

  Furthermore, by forming chamfered portions on the outer peripheral edge of the upper mating surface and the outer peripheral edge of the lower mating surface, grooves are formed at the joint of the upper mating surface and the lower mating surface, It is good also as a structure by which the said sealing member is stored in the said groove | channel.

  By storing the seal member in the groove, the seal member can be reliably positioned at the joint of the upper mating surface and the lower mating surface.

  Furthermore, the groove may have a flat portion that forms a flat shape parallel to the floor surface and supports the seal member from below.

  Since the seal member is supported by the flat portion, when the seal member is attached, the seal member does not slide down from the groove, so that it is possible to reduce the burden of assembling the vehicle compartment.

While holding the pressing member in close contact with the seal member, the pressing member is held in a state of being separated from the outer peripheral surface of the upper casing and the outer peripheral surface of the lower casing, and the pressing member and the upper casing are You may make it further provide the holding member which can adjust the space | interval with the outer peripheral surface of this, and the outer peripheral surface of the said lower compartment.

  By adjusting the distance between the holding member and the outer peripheral surface of the upper casing and the outer peripheral surface of the lower casing, the crushing margin of the sealing member by the holding member can be changed, and the sealing performance by the sealing member can be adjusted.

  A through hole for injecting a silicon sealant that forms the seal member at the joint of the upper mating surface and the lower mating surface may be formed in the pressing member.

  Accordingly, the silicon sealant can be injected between the pressing member and the joint of the upper mating surface and the lower mating surface to form the second seal portion.

  The coefficient of thermal expansion of the material used for the sealing member may be larger than the coefficient of thermal expansion of the material used for the upper casing, the lower casing, and the pressing member.

  As a result, even when a high-temperature internal fluid leaks from the gap between the lower mating surface and the upper mating surface, the sealing member expands more than the other constituent members, thereby further enhancing the sealing performance. be able to.

  A hollow is formed inside and a small hole communicating the cavity and the outside is formed, a head formed in a substantially C-shaped cross section, and a small shaft portion inserted through the small hole in the head A holding bolt comprising: a screw part having a main body part connected to each of both ends of the small shaft part; and a flat plate part; and a thermal expansion part housed in the cavity formed in the head part. The flat plate portion of the screw portion is disposed inside the cavity of the head portion, the surface of the flat plate portion on the side to which the small shaft portion is connected, and the inside of the head portion It is good also as a structure supported so that the said thermal expansion part may be pinched | interposed with a surrounding surface.

  As a result, even when the temperature of the passenger compartment increases, the thermal expansion portion expands as the temperature of the passenger compartment increases, increasing the force pressing the head against the outer peripheral surface. It is possible to maintain a state of being in close contact with each other without generating a gap, and it is possible to further improve the sealing performance.

  A retention groove for retaining the first seal portion may be formed on the lower mating surface.

  This makes it easier for the first seal portion, which is an oil-based sealant, to stay in the stay groove, thereby further improving the sealing performance.

  A rotating machine according to the present invention includes the above-described vehicle interior, and a rotating body that is rotatably held in the vehicle interior and is driven to rotate by a drive source.

  According to this rotating machine, the sealing performance of the passenger compartment can be improved.

The present invention provides a method of assembling a vehicle interior as described above, forming the first sealing portion on at least one of the upper mating surface of said lower mating surface and said upper portion cabin of the lower portion cabin a step of applying an oil-based sealing agent, the said lower portion cabin and the upper portion cabin, and bonding against the said lower mating surface and the upper mating surface, and the lower mating surface the joint of the upper mating surfaces, to form the second seal portion so as to cross the outer peripheral surface of the lower portion cabin and the outer peripheral surface of the upper portion cabin, the upper portion cabin the seam and characterized in that it comprises the the steps of sealing the outer periphery of the lower portion cabin.

  According to this method, it is possible to further improve the sealing performance at the joint between the upper casing and the lower casing.

The method of assembling a passenger compartment of the present invention, the silicon sealant was applied to the seam of the upper mating surfaces, by the fact to volatilize the volatile components contained in the silicon sealant and the lower mating surface sheet After forming the sealant film, the second seal portion may be formed by applying a paint so as to cover the sealant film and volatilizing a volatile component contained in the paint to form a paint film. Good.

By using a silicone sealant agent or paint having a shorter curing period than linseed oil or the like as the second seal portion, the construction can be performed in a short period of time.
Here, the silicone sealant is generally cured by volatilization of volatile components such as alcohol contained in the silicone sealant. According to the present invention, since the coating material is applied after the volatile component is volatilized from the silicon sealant, curing of the silicon sealant is not hindered. As a result, the sealing performance can be reliably ensured.

  According to the present invention, the sealing performance at the mating surface of the upper casing and the lower casing can be further enhanced.

It is a perspective view which shows schematic structure of the steam turbine which concerns on 1st, 2nd embodiment. It is sectional drawing which shows the seal structure in the seam of the lower compartment and upper compartment which comprise the vehicle interior in 1st Embodiment. (A) is sectional drawing which shows the seal structure in the joint of the lower compartment and upper compartment which comprise the compartment in 2nd Embodiment, (b) is sectional drawing to which the principal part of (a) was expanded. It is. It is sectional drawing which shows the 1st modification of the seal structure in the joint line of the lower compartment and upper compartment which comprise the vehicle interior in 2nd Embodiment. It is sectional drawing which shows the 2nd modification of the seal structure in the joint line of the lower compartment and upper compartment which comprise the vehicle interior in 2nd Embodiment. It is sectional drawing which shows the 3rd modification of the seal structure in the joint line of the lower compartment and upper compartment which comprise the vehicle interior in 2nd Embodiment. (A) is a perspective view which shows the 4th modification of the seal structure in the joint of the lower compartment and upper compartment which comprise the compartment in 2nd Embodiment, (b) is a 4th modification It is sectional drawing which shows an example. It is sectional drawing which shows the 5th modification of the seal structure in the joint line of the lower compartment and upper compartment which comprise the vehicle interior in 2nd Embodiment. It is sectional drawing which shows the 6th modification of the seal structure in the seam of the lower compartment and upper compartment which comprise the vehicle interior in 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment for carrying out a method of assembling a vehicle compartment, a rotating machine, and a vehicle compartment according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited only to these embodiments.

(First embodiment)
FIG. 1 is a diagram illustrating a schematic configuration of a steam turbine according to the present embodiment.
As shown in FIG. 1, a steam turbine (rotary machine) 10 is installed on a floor surface, and is provided on a lower casing 20 that opens upward, and on the lower casing 20, and blocks the opening of the lower casing 20. An upper casing 30 and a turbine blade (rotary body) 40 that is rotatably provided in a casing S formed from the lower casing 20 and the upper casing 30 are provided.

The turbine blade 40 includes a main shaft 41 and blade rings 42, 42,... Provided in a plurality of rows at intervals in the axial direction of the main shaft 41.
At least both axial ends of the main shaft 41 of the turbine blade 40 are rotatably supported by bearings 21A and 21B provided in the lower casing 20 and the upper casing 30. The turbine blade 40 is rotationally driven around its axis by steam fed from the outside as a drive source.

  In the lower casing 20, a lower outer peripheral wall 22 is formed along the outer peripheral portion of the casing S on the outer peripheral side of the turbine blade 40. At the upper end portion of the lower outer peripheral wall 22, a lower mating surface 23 that is a joint surface with the upper casing 30 is formed so as to be positioned in a horizontal plane. A number of bolt holes 24 are formed in the lower mating surface 23 at predetermined intervals along the outer periphery of the vehicle compartment S.

  The upper casing 30 is formed with an upper outer peripheral wall 32 along the outer peripheral portion, and an upper mating surface 33 facing the lower mating surface 23 of the lower casing 20 is provided in the horizontal plane at the lower end of the upper outer peripheral wall 32. It is formed so that it may be located in. The upper mating surface 33 has a number of bolt holes 34 formed at predetermined intervals along the outer periphery of the vehicle compartment S.

  In the lower casing 20 and the upper casing 30, bolts (not shown) are inserted into the bolt holes 24 and 34 with the upper mating surface 33 facing the lower mating surface 23, and a nut is inserted at the tip of the bolt. Are connected together.

Here, as shown in FIG. 2, there is a gap between the lower mating surface 23 and the upper mating surface 33 between the lower mating surface 23 of the lower casing 20 and the upper mating surface 33 of the upper casing 30. A first seal portion 50 made of an oil-based sealant such as linseed oil or boiled linseed oil is interposed.
Prior to joining the lower casing 20 and the upper casing 30, the first seal portion 50 is applied in advance to the lower mating surface 23 and the upper mating surface 33 and dried for a predetermined period.

Further, on the outer peripheral side of the portion where the lower mating surface 23 and the upper mating surface 33 face each other, the outer peripheral surface 22a of the lower outer peripheral wall 22 of the lower casing 20 and the outer peripheral surface 32a of the upper outer peripheral wall 32 of the upper casing 30 are provided. A second seal portion 60A is provided which extends in the circumferential direction of the lower outer peripheral wall 22 and the upper outer peripheral wall 32 and seals the gap between the lower mating surface 23 and the upper mating surface 33 from the outer peripheral side. .
The second seal portion 60 </ b> A is applied so as to straddle the outer peripheral surface 22 a of the lower outer peripheral wall 22 and the outer peripheral surface 32 a of the upper outer peripheral wall 32 and extend in the circumferential direction of the lower outer peripheral wall 22 and the upper outer peripheral wall 32. The film 61 and the coating film 62 applied so as to cover the entire sealant film 61 are laminated.
After the lower casing 20 and the upper casing 30 are joined, the sealant film 61 is coated with a silicon sealant so as to straddle the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32. Thereafter, the volatile component such as alcohol contained in the silicone sealant is volatilized by being left for a predetermined period or longer.
The coating film 62 is applied over the sealant film 61 after volatilizing the volatile component, and the sealant film 61 and the outer peripheral surface 22a of the upper and lower lower outer peripheral walls 22 and a part of the outer peripheral surface 32a of the upper outer peripheral wall 32 are applied. The paint is applied so as to cover the volatile components such as the solvent contained in the paint. Here, as the paint used to form the paint film 62, for example, an epoxy paint is suitable.

In order to assemble the compartment S composed of the lower compartment 20 and the upper compartment 30 having the above-described configuration, the following procedure is performed.
First, prior to joining the lower casing 20 and the upper casing 30, for example, linseed oil is applied to the lower mating surface 23 and the upper mating surface 33 as an oil-based sealant that forms the first seal portion 50. . After the linseed oil is applied, the linseed oil is left to stand for a predetermined period (for example, two weeks) and dried. The oil-based sealant may be applied to the upper mating surface of the lower casing 20 after the lower casing 20 is installed at a predetermined position and the turbine blades 40 are set in the lower casing 20.

  Next, the upper casing 30 is put on the lower casing 20 where the turbine blades 40 are set, and the lower mating face 23 and the upper mating face 33 are joined with bolts and nuts (not shown). To do.

  Thereafter, the silicone sealant agent is applied with a predetermined film thickness (for example, about 500 μm) so as to straddle the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32. After application of the silicone sealant, the volatile component contained in the silicone sealant is volatilized by leaving it for a predetermined period (for example, one week) or longer. A sealant film 61 is formed by this silicon sealant.

  Next, the paint is applied on the sealant film 61 after the volatile components are volatilized. At this time, the coating material is applied so as to cover the sealant film 61 and the outer peripheral surface 22 a of the upper and lower lower outer peripheral walls 22 and a part of the outer peripheral surface 32 a of the upper outer peripheral wall 32. After applying the paint, the paint is left for a predetermined period (for example, 1 day) to volatilize volatile components such as a solvent contained in the paint. With this paint, a paint film 62 is formed, and a second seal portion 60 </ b> A composed of the sealant film 61 and the paint film 62 is formed.

According to the configuration described above, an oil-based sealant such as linseed oil is interposed as the first seal portion 50 between the lower mating surface 23 and the upper mating surface 33, and the outer peripheral surface 22 a of the lower outer peripheral wall 22. By providing the second seal portion 60 </ b> A so as to straddle the outer peripheral surface 32 a of the upper outer peripheral wall 32, the sealing performance of the joint surface between the lower casing 20 and the upper casing 30 can be further enhanced.
At this time, by using an oil-based sealant such as linseed oil as the first seal portion 50, it is possible to ensure good sealing performance without hydrolyzing the steam of the steam turbine 10.
And as a 2nd seal | sticker part 60A, it becomes possible to perform construction for a short period of time by using the silicone sealant and coating material whose curing period is shorter than linseed oil etc.
Also, commercially available silicon sealants and paints can be used, and the cost is lower than preparing dedicated inner seal plates and outer seal plates as in the technique described in Patent Document 1.

  Here, the silicone sealant is generally cured by volatilization of volatile components such as alcohol contained in the silicone sealant. According to the present embodiment, since the coating material is applied after the volatile component is volatilized from the silicon sealant, curing of the silicon sealant is not hindered. As a result, the sealing performance can be reliably ensured.

(Second Embodiment)
Next, a second embodiment of the casing, the rotating machine, and the casing assembling method according to the present invention will be described. Note that in the second embodiment described below, the same reference numerals are given to the same components as in the first embodiment, and description thereof will be omitted.
As shown in FIG. 3, in this embodiment, linseed oil, boiled oil that seals the gap between the lower mating surface 23 and the upper mating surface 33 between the lower mating surface 23 and the upper mating surface 33. A first seal portion 50 made of an oil-based sealant such as linseed oil is provided.
Prior to joining the lower casing 20 and the upper casing 30, the first seal portion 50 is applied in advance to the lower mating surface 23 and the upper mating surface 33 and dried for a predetermined period.

As shown in FIG. 3B, at the outer peripheral edge of the lower mating surface 23 of the lower casing 20, a predetermined angle (for example, 45) is formed between the lower mating surface 23 and the outer peripheral surface 22a of the lower outer peripheral wall 22. A chamfered portion 25 that is inclined at (°) is formed.
Further, a chamfered portion 35 inclined at a predetermined angle (for example, 45 °) is formed on the upper mating surface 33 and the outer peripheral surface 32a of the upper outer peripheral wall 32 at the outer peripheral edge portion of the upper mating surface 33 of the upper casing 30. Has been.
Thus, a groove 63 having a substantially V-shaped cross section is formed on the outer peripheral side of the portion where the lower mating surface 23 and the upper mating surface 33 face each other.

  Then, on the outer peripheral side of the joint of the lower mating surface 23 and the upper mating surface 33, the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32 are straddled. A second seal portion 60 </ b> B that extends in the circumferential direction of the wall 32 and seals the gap between the lower mating surface 23 and the upper mating surface 33 from the outer peripheral side is provided.

The second seal portion 60B in this embodiment is a seal member 64 made of a rubber-based material provided in a groove 63 formed so as to straddle the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32. And a pressing member 65 provided so as to cover the seal member 64.
The seal member 64 is, for example, a string shape previously formed in a circular shape in cross section used for an O-ring or the like. The outer diameter of the seal member 64 is accommodated in the groove 63 and is brought into contact with the upper and lower chamfered portions 25 and 35. In this state, a part of the seal member 64 is set so as to protrude from the lower outer peripheral wall 22 and the upper outer peripheral wall 32 to the outer peripheral side.

The pressing member 65 has a plate shape made of a metal plate or the like, and the seal member 64 is provided so as to cover a part of the outer peripheral surface 22a of the lower outer peripheral wall 22 and the upper outer peripheral surface 32a of the upper outer peripheral wall 32. . The holding member 65 is pressed against the outer peripheral surface 22a of the lower outer peripheral wall 22 of the lower casing 20 and the outer peripheral surface 32a of the upper outer peripheral wall 32, and bolt holes (not shown) formed in advance on the outer peripheral surfaces 22a and 32a. ) Is fixed by screwing a bolt which is a holding member of the pressing member 65. In addition, the fixing method of the pressing member 65 is not limited to a bolt, and a magnet or the like may be used.
The seal member 64 is elastically deformed when the pressing member 65 is pressed against the outer peripheral surfaces 22 a and 32 a of the lower outer peripheral wall 22 and the upper outer peripheral wall 32, and comes into close contact with the chamfered portions 25 and 35 forming the groove 63. Yes.

In order to assemble the compartment S composed of the lower compartment 20 and the upper compartment 30 having the above-described configuration, the following procedure is performed.
First, prior to joining the lower casing 20 and the upper casing 30, for example, linseed oil is applied to the lower mating surface 23 and the upper mating surface 33 as an oil-based sealant that forms the first seal portion 50. . After the linseed oil is applied, the linseed oil is left to stand for a predetermined period (for example, two weeks) and dried. The oil-based sealant may be applied to the upper mating surface of the lower casing 20 after the lower casing 20 is installed at a predetermined position and the turbine blades 40 are set in the lower casing 20.

  Next, the upper casing 30 is put on the lower casing 20 where the turbine blades 40 are set, and the lower mating face 23 and the upper mating face 33 are joined with bolts and nuts (not shown). To do.

  Thereafter, the seal member 64 is disposed in a groove 63 formed so as to straddle the outer peripheral surface 22 a of the lower outer peripheral wall 22 and the outer peripheral surface 32 a of the upper outer peripheral wall 32. At this time, the presence of the groove 63 makes it easy to position the seal member 64.

  Next, the pressing member 65 is fixed to the outer peripheral surface 22 a of the lower outer peripheral wall 22 and the outer peripheral surface 32 a of the upper outer peripheral wall 32 with a plurality of bolts so as to cover the seal member 64. Thereby, the seal member 64 is crushed in the groove 63, and the second seal portion 60 </ b> B including the seal member 64 and the pressing member 65 is formed.

According to the configuration described above, an oil-based sealant such as linseed oil is interposed as the first seal portion 50 between the lower mating surface 23 and the upper mating surface 33, and the outer peripheral surface 22 a of the lower outer peripheral wall 22. By providing the second seal portion 60 </ b> B so as to straddle the outer peripheral surface 32 a of the upper outer peripheral wall 32, the sealing performance of the joint surface between the lower casing 20 and the upper casing 30 can be further enhanced.
At this time, by using an oil-based sealant such as linseed oil as the first seal portion 50, it is possible to ensure good sealing performance without hydrolyzing the steam of the steam turbine 10.
And it becomes possible to perform construction in a short period of time by using the seal member 64 and the pressing member 65 as the second seal portion 60B, and immediately after the second seal portion 60B is attached, the operation of the steam turbine 10 is started. be able to.
Further, commercially available seal members 64 and pressing members 65 can be used, and the cost is lower than when a dedicated inner seal plate and outer seal plate are prepared as in the technique described in Patent Document 1.

(First Modification of Second Embodiment)
In the second embodiment, the pressing member 65 is fixed by a plurality of bolts while being pressed against the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32. This is not a limitation.
As shown in FIG. 4, the pressing member 65 is fixed by a plurality of bolts 69 in close contact with the seal member 64 while being separated from the outer peripheral surface 22 a of the lower outer peripheral wall 22 and the outer peripheral surface 32 a of the upper outer peripheral wall 32. To do. Then, by tightening the bolt 69 in accordance with the operating condition, the sealing condition of the second seal portion 60B between the lower mating surface 23 and the upper mating surface 33, etc., the pressing member 65 and the lower outer peripheral wall 22 It is also possible to change the distance between the outer peripheral surface 22a and the outer peripheral surface 32a of the upper outer peripheral wall 32, thereby increasing the crushing margin of the seal member 64 and adjusting the sealing performance in the second seal portion 60B.

(Second modification of the second embodiment)
As shown in FIG. 5, in the second embodiment, the pressing member 65 has a triangular cross-section projecting toward the groove 63 at a position facing the seal member 64 in the groove 63. You may make it provide the protrusion 66 which follows the circumferential direction along.
The pressing member 65 having the ridge 66 is fixed to the outer peripheral surface 22 a of the lower outer peripheral wall 22 and the outer peripheral surface 32 a of the upper outer peripheral wall 32 with a plurality of bolts. Thereby, the sealing member 64 is crushed by the protrusion 66 in the groove 63, and the adhesion of the sealing member 64 to the groove 63 can be improved, and the sealing performance can be improved.
Here, the protrusion 66 is not limited to a triangular cross section, but may be a semicircular cross section, a trapezoidal cross section, or the like.

  Further, in the second embodiment and the second modification shown in FIG. 5, the seal member 64 is not formed from a rubber-based material, but a silicon sealant agent is applied in the groove 63, and after application, It is also possible to leave it for a predetermined period or longer and to form it by volatilizing a volatile component contained in the silicon sealant.

(Third Modification of Second Embodiment)
Further, as shown in FIG. 6, in the pressing member 65, a through hole 67 is provided at a position facing the groove 63, and the silicon sealant 68 is replaced from the through hole 67 in place of the seal member 64 of the second embodiment. May be injected. In this case, a plurality of through holes 67 are formed at appropriate intervals in the direction in which the grooves 63 are continuous.
As in the second embodiment, the pressing member 65 having the through hole 67 is provided with an oil-based sealing agent such as linseed oil as the first seal portion 50 between the lower mating surface 23 and the upper mating surface 33. After the lower casing 20 and the upper casing 30 are joined together in an interposed state, the lower casing 20 is fixed to the outer peripheral face 22a of the lower outer peripheral wall 22 and the outer peripheral face 32a of the upper outer peripheral wall 32 with a plurality of bolts. Next, a silicon sealant 68 is filled into the gap between the groove 63 and the pressing member 65 from the through hole 67.
As a result, a second seal portion 60 </ b> C composed of the silicon sealant 68 and the pressing member 65 is formed.

  According to such a configuration, by injecting the silicon sealant 68 from the through-hole 67, the silicon sealant 68 can be reliably filled into the groove 63, and the workability and fillability can be improved.

As in the second embodiment, with the seal member 64 disposed in the groove 63, the gap between the groove 63, the seal member 64, and the pressing member 65 is filled with the silicon sealant 68 from the through hole 67. You may make it do.
By doing in this way, it is possible to improve a sealing performance further.

In the third modification shown in FIG. 6, the silicon sealant 68 has a thermal expansion coefficient larger than that of the material used for the lower outer peripheral wall 22, the upper outer peripheral wall 32, and the holding member 65. It is good also as selecting. For example, when the lower outer peripheral wall 22, the upper outer peripheral wall 32 and the pressing member 65 are made of steel, the thermal expansion coefficient of steel is about 10 × 10 ⁻⁶ / ° C. The thermal expansion coefficient is about 100 × 10 ⁻⁶ / ° C., which satisfies the above conditions.
According to such a configuration, even when the high-temperature internal fluid leaks from the gap between the lower mating surface 23 and the upper mating surface 33, the silicone sealant 68 expands accordingly, so that the sealing performance is further increased. It is possible to increase.

Similarly, the thermal expansion of the seal member 64 used in the second embodiment, the first and second modified examples shown in FIGS. 4 and 5, and the fourth to sixth modified examples to be described later. You may select a coefficient whose coefficient is larger than the thermal expansion coefficient of the lower outer peripheral wall 22, the upper outer peripheral wall 32, and the pressing member 65.
By doing in this way, since the sealing member 64 expand | swells with the leakage of an internal fluid, it is possible to improve a sealing performance further.

(Fourth modification of the second embodiment)
Further, as shown in FIG. 7A, a part of the lower mating surface 23 of the lower outer peripheral wall 22 is cut out into a semicircular shape to form a staying groove 23 </ b> A extending along the lower mating surface 23. May be.
According to such a configuration, as shown in FIG. 7B, the first seal portion 50, which is an oil-based sealant such as linseed oil, is likely to stay in the stay groove 23A. It is possible.
In the fourth modification shown in FIG. 7, the shape of the staying groove 23A is not limited to a semicircular shape, and may be a V-shaped or U-shaped groove, or a rectangular groove. Further, instead of providing the staying groove 23A on the lower mating surface 23, an equivalent staying groove may be provided on the upper mating surface 33, or the staying groove 23A on the lower mating surface 23 and the staying groove on the upper mating surface 33 May be provided together.

(Fifth Modification of Second Embodiment)
Further, in the second embodiment described above, the shape of the groove 63 is formed in a substantially V-shaped cross section (FIG. 3B), but in another modification of the second embodiment, It is not limited to an aspect. For example, as shown in FIG. 8, a notch 33 </ b> A may be formed on the outer peripheral edge of the upper mating surface 33 of the upper casing 30. Accordingly, the lower mating surface 23 and the upper mating surface 33 are formed by the notch 33A and the flat portion 23B which is a flat surface (horizontal plane) parallel to a part of the floor surface of the lower mating surface 23. A trapezoidal groove 63 </ b> A, which is an embodiment of the groove 63, is formed on the outer peripheral side of the portion where the surfaces face each other. The depth d of the trapezoidal groove 63A (the length in the direction from the outer peripheral edge side to the inner wall side (see FIG. 8)) is set to such a depth that the entire cross-sectional circle of the seal member 64 can be accommodated.

In the case of the fifth modification shown in FIG. 8, during the assembly of the compartment S composed of the lower compartment 20 and the upper compartment 30, the trapezoidal groove 63 </ b> A formed on the outer peripheral surface 32 a side of the upper outer peripheral wall 32 is inserted. The seal member 64 is disposed so as to be accommodated. In the case of the second embodiment described above, since the groove 63 is substantially V-shaped (FIG. 3B), the seal member 64 slips from the groove 63 due to gravity when the seal member 64 is attached. It was thought that. However, according to the fifth modification shown in FIG. 8, the trapezoidal groove 63A is provided as the groove 63, so that the flat portion 23B supports the seal member 64 from below with respect to gravity.
According to such a configuration, when the seal member 64 is attached, the seal member 64 does not slide down from the trapezoidal groove 63A, so that it is possible to reduce the burden of assembling the vehicle compartment S.

Further, in the fifth modified example shown in FIG. 8, the pressing member 65 is a convex shape that protrudes in a rectangular shape in cross section toward the trapezoidal groove 63A at a position facing the seal member 64 in the trapezoidal groove 63A. It is good also as a structure which has the convex part 65A continuous in the circumferential direction along 63A.
Here, in the case of the fifth modification shown in FIG. 8, the depth d of the trapezoidal groove 63A is such a depth that the entire seal member 64 is sufficiently supported by the flat portion 23B in order to achieve the above-mentioned purpose. Must be set to Therefore, in this case, since the seal member 64 penetrates deeply into the trapezoidal groove 63A, when the surface facing the outer peripheral surfaces 22a and 32a of the pressing member 65 is flat, the crushing allowance of the seal member 64 cannot be sufficiently obtained. There is. Therefore, the pressing member 65 having the convex portion 65A described above is fixed to the outer peripheral surface 22a of the lower outer peripheral wall 22 and the outer peripheral surface 32a of the upper outer peripheral wall 32 with a plurality of bolts. Can be further crushed in the trapezoidal groove 63A to improve the adhesion of the seal member 64 to the trapezoidal groove 63A, and to improve the sealing performance.

The fifth modified example shown in FIG. 8 is not limited to the above-described aspect.
For example, the convex portion 65A may have a triangular cross section as shown in FIG. 5 in addition to the above-described convex shape, or a structure having a semicircular cross section and a trapezoidal cross section. May be.
Further, instead of forming the notch 33A at the outer peripheral edge of the upper mating surface 33 of the upper casing 30, a notch having a horizontal plane parallel to the floor at the outer peripheral edge of the lower mating surface 23 of the lower casing 20 is provided. The structure by which a part is formed may be sufficient. Even with such a configuration, the trapezoidal groove 63A can be formed on the outer peripheral side of the portion where the lower mating surface 23 and the upper mating surface 33 face each other.
Further, a notch 33A is formed at the outer peripheral edge of the upper mating surface 33 of the upper casing 30, and a notch having a horizontal plane parallel to the floor at the outer peripheral edge of the lower mating surface 23 of the lower casing 20. The structure which forms may be sufficient.

(Sixth Modification of Second Embodiment)
In the above-described second embodiment and the first to fifth modifications of the second embodiment, the outer peripheral surface 22a of the lower outer peripheral wall 22 and the upper outer periphery while the pressing member 65 is in close contact with the seal member 64. The outer peripheral surface 32a of the wall 32 is fastened with a plurality of bolts that are holding members. Here, as shown in FIG. 9, as one aspect of the bolt that is the holding member, the holding bolt 69 </ b> H includes a physically separated head 69 </ b> A and a threaded portion 69 </ b> B, and heat inside the head 69 </ b> A. It is good also as a structure which has 69 C of expansion parts. Hereinafter, this configuration will be described in detail.

As shown in FIG. 9, the head 69 </ b> A of the holding bolt 69 </ b> H is formed with a cavity V surrounded by a head inner peripheral surface 69 </ b> A <b> 2 and a small hole 69 </ b> A <b> 3 that communicates the cavity V with the outside. The The head inner peripheral surface 69A2 and the head outer peripheral surface 69A1 communicate with each other through a small hole 69A3.
In FIG. 9, the direction parallel to the floor surface and perpendicular to the outer peripheral surfaces 22 a and 32 a in the figure, the direction from the inside of the passenger compartment S to the outside is represented as the + x direction, and the opposite direction is represented as the −x direction. I will do it.

  Furthermore, as shown in FIG. 9, the threaded portion 69B of the holding bolt 69H is configured by integrating a main body portion 69B1, a small shaft portion 69B2, and a flat plate portion 69B3. As shown in FIG. 9, the small shaft portion 69B2 is inserted through the small hole 69A3 of the head portion 69A while connecting the main body portion 69B1 and the flat plate portion 69B3. A predetermined screw thread (not shown) is provided on the surface of the main body 69B1, and the screw thread is inserted while meshing with a screw groove (not shown) provided on the inner wall of the outer peripheral surface bolt hole 32b. As a result, the entire holding bolt 69H is fixed to the outer peripheral surface 32a. The flat plate portion 69B3 is disposed at the tip of the small shaft portion 69B2 inserted through the small hole 69A3 from the outside of the head portion 69A toward the inside (cavity V), and is larger than the diameter of the small hole 69A3 in the cavity V. It is formed with a diameter. Accordingly, the flat plate portion 69B3 is physically configured to remain inside the cavity V, and thus the screw portion 69B is configured not to fall off from the head portion 69A.

Further, as shown in FIG. 9, the thermal expansion portion 69C has a surface facing the + x direction of the head inner peripheral surface 69A2 (a surface in contact with the edge of the small hole 69A3 in the head inner peripheral surface 69A2), a flat plate The portion 69B3 is supported so as to be sandwiched by a surface facing the −x direction (the surface on the side where the small shaft portion 69B2 of the flat plate portion 69B3 is connected). Here, the thermal expansion portion 69C is, for example, an O-ring formed in advance in a circular cross section with a rubber material. The outer diameter of the circular section of the thermal expansion portion 69C is such that the surface of the head inner peripheral surface 69A2 facing the −x direction and the surface of the flat plate portion 69B3 facing the + x direction are in close contact with each other. It is set to be larger than the separation distance l (see FIG. 9) between the surface facing the + x direction of the surface 69A2 and the surface facing the −x direction of the flat plate portion 69B3. With such a configuration, the thermal expansion portion 69C is accommodated inside the cavity V with a crushing allowance. Since the thermal expansion portion 69C is housed in the cavity V in a state of being crushed at a separation distance l, the thermal expansion portion 69C is in the −x direction with respect to the head 69A and in the + x direction with respect to the screw portion 69B. Apply the force to restore. As a result, the thermal expansion portion 69C fixes the holding bolt 69H as a whole in a state where the surface facing the −x direction of the head inner peripheral surface 69A2 is pressed against the surface facing the + x direction of the flat plate portion 69B3.
In the sixth modification shown in FIG. 9, the thermal expansion portion 69C is used for the lower outer peripheral wall 22, the upper outer peripheral wall 32, the pressing member 65, the head 69A of the holding bolt 69H, and the screw portion 69B. Select a material that is greater than the coefficient of thermal expansion of the material. As described above, when the lower outer peripheral wall 22, the upper outer peripheral wall 32, the pressing member 65, and the head 69A and the screw portion 69B of the holding bolt 69H are made of steel, the thermal expansion portion 69C is a rubber-based material or sealant. If it is an agent, this condition is satisfied.

Here, in the above-described second embodiment and the first to fifth modifications of the second embodiment, when the pressing member 65 is fastened with a normal bolt, the entire vehicle compartment S is moved along with the operation of the steam turbine 10. When the temperature is increased, a gap h is generated between the outer peripheral surfaces 22a and 32a and the pressing member 65 due to thermal expansion of the lower outer peripheral wall 22, the upper outer peripheral wall 32, the pressing member 65, and the bolt, and the sealing performance is deteriorated. There is a case.
However, according to the above-described sixth modification, when the temperature of the entire vehicle compartment S is increased due to the operation of the steam turbine 10, the thermal expansion portion 69C of the holding bolt 69H has a higher heat than other components. It expands at an expansion rate. If it does so, 69 C of thermal expansion will increase the force F which acts on the surface which faces + x direction of head inner peripheral surface 69A2 by self-expanding (refer FIG. 9). That is, the thermal expansion portion 69C has an effect of increasing the force that presses the head 69A in the −x direction in accordance with the high temperature of the passenger compartment S. Therefore, the holding bolt 69H does not generate a gap h between the outer peripheral surfaces 22a and 32a and the pressing member 65 even when the passenger compartment S is heated, and can always be kept in close contact. Further, it becomes possible to further improve the sealing performance.

(Other embodiments)
Note that the casing, rotating machine, and casing assembling method of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various modifications are conceivable within the technical scope thereof. .
For example, the groove 63 shown in the second embodiment may have any shape, and the groove 63 may be omitted.
Further, for example, the schematic configuration of the steam turbine 10 is illustrated in FIG. 1, but the detailed configuration of the steam turbine 10 is not questioned at all. For example, the configuration shown in each of the above embodiments can be applied to the steam turbine 10 regardless of the low-pressure part or the high-pressure part.
Further, not only the steam turbine 10 but also the gas turbine casing and the compressor casing (corresponding to the casing) can be similarly applied to the configurations described in the above embodiments.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

10 Steam turbine (rotary machine)
20 Lower casing 21, 31 Bearing 22 Lower outer peripheral wall 22a, 32a Outer peripheral surface 23 Lower mating surface 23A Retention groove 23B Flat portion 24, 34 Bolt hole 25, 35 Chamfered portion 30 Upper casing 32 Upper outer peripheral wall 32a Outer peripheral surface 32b Outer peripheral surface bolt hole 33 Upper mating surface 33A Notch 40 Turbine blade (rotary body)
41 Main shaft 42, blade ring 50 first seal part 60A, 60B, 60C second seal part 61 sealant film 62 paint film 63 groove 63A trapezoidal groove 64 seal member 65 pressing member 65A convex part 66 protrusion 67 through hole 68 silicon sealant 69 Bolt (holding member)
69H Holding bolt 69A Head 69A1 Head outer peripheral surface 69A2 Head inner peripheral surface 69A3 Small hole 69B Screw portion 69B1 Main body 69B2 Small shaft portion 69B3 Flat plate portion 69C Thermal expansion portion S

Claims (13)

An upper compartment having an upper mating surface;
A lower casing having a lower mating surface facing the upper mating surface;
A first seal portion, which is interposed between the upper mating surface and the lower mating surface, and is made of an oil-based sealant that seals a gap between the upper mating surface and the lower mating surface;
It extends so as to straddle the outer peripheral surface of the upper casing and the outer peripheral surface of the lower casing, and the joint of the upper mating surface and the lower mating surface is from the outer peripheral side of the upper casing and the lower casing A second seal portion for sealing;
A vehicle compartment characterized by comprising:   2. The vehicle interior according to claim 1, wherein the second seal portion includes a sealant film made of a silicone sealant agent, and a paint film made of paint laminated so as to cover the sealant film. The second seal part is a seal member made of a rubber-based material or a silicone sealant agent disposed on the outer peripheral side of the joint of the upper mating surface and the lower mating surface;
The casing according to claim 1, further comprising: a pressing member that sandwiches the seal member between the outer peripheral surface of the upper casing and the outer peripheral surface of the lower casing. By forming chamfered portions on the outer peripheral edge of the upper mating surface and the outer peripheral edge of the lower mating surface, grooves are formed at the joints of the upper mating surface and the lower mating surface,
The vehicle interior according to claim 3, wherein the seal member is housed in the groove.   The vehicle interior according to claim 4, wherein the groove has a flat portion that forms a flat shape parallel to the floor surface and supports the seal member from below. While holding the pressing member in close contact with the seal member, the pressing member is held in a state of being separated from the outer peripheral surface of the upper casing and the outer peripheral surface of the lower casing, and the pressing member and the upper casing are The vehicle compartment according to any one of claims 3 to 5, further comprising a holding member capable of adjusting a distance between the outer peripheral surface of the lower casing and the outer peripheral surface of the lower casing.   The through-hole for inject | pouring the silicone sealant which forms the said sealing member in the joint of the said upper mating surface and the said lower mating surface is formed in the said pressing member. The vehicle compartment according to any one of the above.   The thermal expansion coefficient of the material used for the seal member is larger than the thermal expansion coefficient of the material used for the upper casing, the lower casing, and the pressing member. The vehicle compartment according to any one of the above. A head is formed with a hollow formed inside and a small hole communicating the cavity with the outside, and having a substantially C-shaped cross section;
A screw portion having a small shaft portion inserted through the small hole of the head, a main body portion connected to each of both ends of the small shaft portion, and a flat plate portion;
A thermal expansion part accommodated in the cavity formed in the head;
A holding bolt comprising:
With
The flat plate portion of the screw portion is disposed inside the cavity of the head portion, the surface of the flat plate portion on the side to which the small shaft portion is connected, the inner peripheral surface of the head portion, The vehicle compartment according to any one of claims 3 to 8, wherein the thermal expansion portion is supported by the support.   The vehicle interior according to any one of claims 1 to 9, wherein a retention groove for retaining the first seal portion is formed on the lower mating surface. The vehicle compartment according to any one of claims 1 to 10,
A rotating body rotatably held in the vehicle interior and driven to rotate by a driving source;
A rotating machine comprising: A method of assembling a vehicle compartment according to any one of claims 1 to 10,
A step of applying an oil-based sealing agent forming the first sealing portion on at least one of the upper mating surface of said lower mating surface and said upper portion cabin of the lower portion cabin,
And said upper portion cabin and the lower portion cabin, and bonding against the said lower mating surface and the upper mating surface,
The joint of the upper mating surface and the lower mating surface, forming said second seal part so as to straddle the outer peripheral surface of the lower portion cabin and the outer peripheral surface of the upper portion cabin, the seam a step of sealing the outer periphery of the upper portion cabin and the lower part the cabin,
A method for assembling a vehicle compartment, comprising: After the silicon sealant agent is applied below the mating surface and the joint of the upper mating surface to form a sheet Zealand film by that to volatilize the volatile components contained in the silicon sealant,
The coating material is applied so as to cover the sealant film, and the second seal portion is formed by forming a paint film by volatilizing a volatile component contained in the paint. How to assemble the passenger compartment.

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