JP6614576B2 - Manufacturing method of vehicle interior and manufacturing method of rotating machine - Google Patents

Description

  The present invention relates to a method for manufacturing a passenger compartment and a method for manufacturing a rotary machine.

  Generally, a steam turbine includes a rotor that rotates around an axis, and a passenger compartment that covers the rotor from the outer peripheral side. A plurality of moving blades are arranged on the outer peripheral surface of the rotor, and a plurality of stationary blades are arranged on the inner peripheral surface of the passenger compartment so as to face these moving blades. Further, an intake port for taking in steam is formed on one end side of the passenger compartment, and an exhaust port for discharging steam is formed on the other end side. The high-temperature and high-pressure steam that has flowed into the passenger compartment from the intake port sequentially collides with the moving blade and the stationary blade, thereby giving rotational energy to the rotor through the moving blade. In this way, the thermal energy of the steam is extracted as the kinetic energy of the rotor and used for various purposes such as driving the generator.

  By the way, it is common for the above-mentioned passenger compartment to adopt a configuration in which the upper half and the lower half are divided into two in the vertical direction. In assembling the steam turbine having the compartment divided into two parts in this way, first arrange the lower half on the turbine mount, then arrange the rotor and auxiliary equipment on the lower half, and finally the upper half Often, a process of arranging the upper part of the lower half is performed. As a specific example of an apparatus employing such a configuration, one described in Patent Document 1 below is known. The steam turbine according to Patent Document 1 includes a lower half diaphragm disposed in a lower part, an upper half diaphragm installed in an upper part, and a support bar that supports only the lower half diaphragm from the outer peripheral side.

  Here, during the operation of the steam turbine, it is known that high-temperature and high-pressure steam causes thermal expansion in both the axial direction in the passenger compartment and the rotor. When adopting a configuration in which only the lower half diaphragm is supported by the support bar as in the steam turbine described in Patent Document 1, the thermal elongation of the lower half diaphragm is regulated by the support bar, but is not supported at all. A relatively large thermal elongation occurs in the upper half diaphragm that is not. That is, there is a possibility that a circumferential imbalance in the clearance between the rotor and the upper portion and the lower portion of the passenger compartment may occur due to the difference in thermal expansion between the upper half diaphragm and the lower half diaphragm. If there is an imbalance in the clearance, the performance of the steam turbine may be affected.

  Therefore, instead of the configuration in which the lower half of the passenger compartment is supported as described above, it is conceivable to adopt a configuration in which only the upper half of the passenger compartment is supported by a support base. According to such a configuration, since the height of the dividing surface between the upper half and the lower half can be matched with the height of the position supported by the support base, even if thermal expansion occurs in the passenger compartment The effect on the rotor clearance is limited.

JP 58-1060103 A

  However, in the case of adopting a configuration that supports only the upper half as described above, the manufacturing / assembly process may be complicated. As an example of such a process, with only the lower half of the passenger compartment temporarily supported by the temporary support member from below, the rotor and the upper half are arranged in the lower half, and finally the temporary support member is removed. A method of newly arranging the support member is conceivable. Thus, there is a possibility that man-hours and costs are increased in terms of attaching and removing the temporary support member.

According to the first aspect of the present invention, a method of manufacturing a vehicle compartment includes a rotor half extending vertically and a vehicle upper half portion and a vehicle lower half portion that are vertically divided into two. A method of manufacturing a passenger compartment in which flange portions are bolted together,
A base part of a support jig is detachably attached to the outer peripheral end surface of the lower half of the passenger compartment , and an accommodation recess between a pair of projecting parts projecting away from the base part in the horizontal direction toward the outer peripheral side, A preparatory step of attaching the support member by detachably fitting , and after the preparatory step, only the support member of the support jig and the support member is placed on the support base protruding upward from the turbine mount. A lower half installation step of supporting the lower half of the passenger compartment by the support pedestal, and the upper half of the passenger compartment after the lower half installation step, the flange portion of the upper half of the passenger compartment Are installed on the support jig and the support member, and after the upper half installation step, each of the upper half of the vehicle compartment and the lower half of the vehicle compartment Bolt flange Comprising a bolt joint step of if, after the bolt joining step, and a jig removing step of removing off the support jig from the flange portion and the support member of the lower half the casing.

  According to the first aspect of the present invention, a method of manufacturing a vehicle compartment includes a rotor half extending vertically and a vehicle upper half portion and a vehicle lower half portion that are vertically divided into two. A method of manufacturing a passenger compartment in which flange portions are bolted to each other, wherein a support jig protruding toward the outer peripheral side is detachably attached to an outer peripheral end surface of the lower half of the passenger compartment, and the support jig A support step for detachably attaching a support member to the inner peripheral side of the turbine, and after the preparation step, by placing the support member on a support base protruding upward from the turbine mount, the support base allows the A lower half installation step for supporting the lower half of the passenger compartment, and after the lower half installation step, the upper half of the passenger compartment, and the flange portion of the upper half of the passenger compartment on the support jig and the support member On installation to be placed After the installation step, after the upper half installation step, a bolt joining step of bolting the flange portions of the upper half of the passenger compartment and the lower half of the passenger compartment, and after the bolt joining step, the support jig A jig removing step of removing the tool from the flange part of the lower half of the vehicle compartment and the support member.

  According to this configuration, the flange portion of the lower half of the passenger compartment is first supported on the support base by the support jig and the support member attached in the preparation process. Next, the flange portion in the upper half of the passenger compartment is bolted to the flange portion in the lower half of the passenger compartment. At this time, the flange portion of the upper half of the passenger compartment is placed on the support jig and the support member. That is, in this state, the flange part of the upper half of the passenger compartment is supported from below by the support base via the support member, and no load is applied to the support jig. Therefore, the support jig can be easily detached from the flange portion and the support member in the lower half of the vehicle compartment by executing the jig removing step. In this way, a configuration in which the upper half of the passenger compartment is supported on the support pedestal can be obtained only by detaching the support jig. In other words, between the state where the support pedestal supports the lower half of the passenger compartment and the state where the support pedestal supports the upper half of the passenger compartment, the passenger compartment is lifted upward, or other support structure The above-described configuration can be obtained without providing an object.

  According to the second aspect of the present invention, the support base may be attached to both sides in the axial direction on the outer peripheral end surface.

  During operation, the passenger compartment and the rotor often thermally expand toward both sides in the axial direction. According to said structure, since a support base is provided in the both sides of an axial direction, the displacement to the axial direction by heat | fever elongation can fully be received.

  According to a third aspect of the present invention, there is provided a method for manufacturing a rotary machine, the method for manufacturing a passenger compartment according to the first or second aspect, and the lower half of the rotor after the lower half installation step. A rotor installation step of placing on the half.

  According to this configuration, the rotating machine can be manufactured more easily.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the compartment which can be assembled easily, and the manufacturing method of a rotary machine can be provided.

It is a figure which shows the structure of the rotary machine which concerns on embodiment of this invention. It is a figure which shows the compartment of a preparatory process in the manufacturing method of the compartment which concerns on embodiment of this invention. It is a figure which shows the compartment of a lower half installation process in the manufacturing method of the compartment which concerns on embodiment of this invention. It is a figure which shows the compartment of an upper half installation process in the manufacturing method of the compartment which concerns on embodiment of this invention. It is a figure which shows a bolt joining process and a jig | tool removal process in the manufacturing method of the vehicle interior which concerns on embodiment of this invention. It is a flowchart which shows each process of the manufacturing method of the compartment which concerns on embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a steam turbine 100 as a rotating machine according to this embodiment includes a rotor 1 extending in the direction of the axis A and a casing 2 that covers the rotor 1 from the outer peripheral side.

  The rotor 1 has a cylindrical shape with the axis A as the center. Although not shown in detail, a plurality of blade stages arranged in the circumferential direction of the axis A and spaced apart in the direction of the axis A are provided in the middle of the extension of the rotor 1. The rotor 1 rotates about the axis A when high-temperature and high-pressure steam flowing from the direction of the axis A collides with these blade stages. In the present embodiment, the axis A extends in the horizontal direction.

  The vehicle compartment 2 is divided into two members (divided into two parts) in the direction orthogonal to the axis A, that is, in the vertical direction. Specifically, the vehicle compartment 2 includes an upper half 3 that forms the upper half, a lower half 4 that forms the lower half, and a support that supports the compartment 2 on the turbine mount 5. And a structure 6.

  Both the upper half 3 and the lower half 4 of the passenger compartment have a semi-cylindrical shape with the axis A as the center. That is, by combining the upper half 3 and the lower half 4 of the passenger compartment from both sides in the vertical direction, a space is formed inside thereof. The rotor 1 is inserted into the space. Further, in the inner peripheral surfaces of the upper half 3 and the lower half 4 of the passenger compartment, the rotor blades and the rotor blades of the rotor 1 are opposed to each other in the radial direction of the axis A in the direction of the axis A. A plurality of stationary blade stages arranged in such a manner are provided.

  The upper half 3 of the passenger compartment and the lower half 4 of the passenger compartment are respectively provided with intake ports 7 into which high-temperature and high-pressure steam supplied from an external steam generation source is introduced. Further, the lower half 4 of the passenger compartment is provided with an exhaust port 8 for discharging steam after rotating the rotor 1.

  In the following description, the boundary surface between the upper half 3 and the lower half 4 of the passenger compartment is referred to as a dividing plane P. The dividing plane P is a virtual plane extending in a plane (horizontal plane) including the axis A.

  The upper half 3 of the passenger compartment is provided with a pair of upper half flanges 10 that extend in the direction of the axis A along the dividing plane P. More specifically, the lower surface (flange lower surface 11) of the upper half flange portion 10 has a flat surface extending in the dividing surface P. The lower half 4 of the passenger compartment is also provided with a lower half flange 12 similar to the upper half 3 of the passenger compartment. An upper surface (flange upper surface 13) of the lower half flange portion 12 has a planar shape extending in the dividing surface P. That is, when the passenger compartment upper half 3 and the passenger compartment lower half 4 are joined, both the flange lower surface 11 and the flange upper surface 13 are in contact with each other in the dividing surface P.

  The casing 2 configured as described above is supported from below by the support structure 6 on the turbine mount 5. The turbine mount 5 is made of, for example, reinforced concrete. Further, the turbine mount 5 is provided with an opening 14 for accommodating the passenger compartment 2. The casing 2 is supported on the turbine mount 5 so that the lower half 4 of the casing is generally buried in the opening 14.

  The support structure 6 has a columnar support pedestal 15 provided at the edge of the opening 14 of the turbine mount 5 and a support member 16 placed on the support pedestal 15. When viewed from above (that is, in plan view), the support base 15 and the support member 16 have substantially the same shape and cross-sectional area. In the present embodiment, the support base 15 and the support member 16 have a rectangular cross-sectional shape.

  On the upper part of the support member 16, the upper half flange portion 10 in the upper half portion 3 of the passenger compartment is placed. That is, in the steam turbine 100 according to this embodiment, only the upper half 3 of the passenger compartment is supported on the turbine mount 5 from below by the support structure 6. The vehicle interior lower half 4 is fastened to the vehicle interior upper half 3 with a joining bolt 18 (bolt).

  Next, a method for manufacturing a rotating machine (a method for manufacturing the vehicle compartment 2) according to the present embodiment will be described with reference to FIGS. The manufacturing method according to the present embodiment includes a preparation step S1, a lower half installation step S2, a rotor installation step S3, an upper half installation step S4, a bolt joining step S5, and a jig removing step S6 ( (See FIG. 6).

  As shown in FIGS. 2 and 3, in the preparation step S <b> 1, the support jig 19 and the support member 16 are attached to the outer peripheral end surface 4 </ b> A of the lower half 4 of the passenger compartment. Specifically, as shown in FIG. 3, the support jig 19 according to the present embodiment has a base 20 that comes into contact with the outer peripheral end surface 4 </ b> A from the direction of the axis A, and projects from the base 20 toward the outer peripheral side of the vehicle compartment 2. And a pair of projecting portions 21 that are substantially C-shaped in plan view. Each of the pair of projecting portions 21 extends in the horizontal plane. A gap is formed in the radial direction of the axis A between the protrusions 21. The gap serves as a housing recess 22 for housing the support member 16.

  As described above, the support member 16 has a rectangular cross section in plan view. The accommodating recess 22 in the support jig 19 has a rectangular shape corresponding to the cross-sectional shape of the support member 16. Thereby, the support member 16 is detachably fitted to the inner peripheral side (inner side) of the housing recess 22 without a gap. As shown in FIG. 3, the support jig 19 and the support member 16 are detachably attached to the outer peripheral end surface 4 </ b> A of the lower half part 4 of the passenger compartment by auxiliary bolts. Thus, the preparation process S1 is completed.

  Subsequently, the lower half installation step S2 is performed after the preparation step S1. In the lower half installation step S <b> 2, the lower half 4 of the passenger compartment with the support member 16 and the support jig 19 attached as described above is placed on the support base 15 provided in advance on the turbine mount 5. To do. Here, in this process, only the support member 16 is placed on the support base 15. In other words, the support jig 19 is exposed to the outside in the vertical direction. As described above, the lower half 4 of the passenger compartment is supported by the support base 15.

  In the subsequent rotor installation step S3, the rotor 1 and other auxiliary machines (bearing device, lubrication device, etc.) are placed inside the lower half part 4 of the passenger compartment disposed on the turbine mount 5 through the lower half installation step S2. Install. It is desirable that the rotor 1 be assembled in advance prior to this step.

  Further, the upper half installation step S4 is performed in a state where the rotor 1 is disposed on the lower half 4 of the passenger compartment as described above. As shown in FIG. 4, in the upper half installation step S <b> 4, the upper half portion 3 of the passenger compartment is arranged so that the upper half flange portion 10 covers the support jig 19 and the support member 16 from above. Further, as shown in the figure, the upper half flange portion 10 and the lower half flange portion 12 are joined to each other by the joint bolt 18 described above (bolt joining step S5). By performing this step, the upper half 3 of the passenger compartment is supported on the support member 16.

  Subsequently, as shown in FIG. 5, only the support jig 19 is removed from the lower half flange portion 12 and the support member 16. As described above, the support jig 19 is not placed on the support pedestal 15 and is entirely exposed downward. For this reason, this can be easily removed by pulling the support jig 19 downward. By removing the support jig 19, all the steps of the manufacturing method of the rotary machine according to the present embodiment are completed.

  As described above, according to the method according to the present embodiment, the lower half flange portion 12 of the lower half portion 4 of the passenger compartment is first supported by the support jig 19 and the support member 16 that are attached in the preparation step S1. Supported on a pedestal 15. Next, the upper half flange portion 10 of the upper half portion 3 of the passenger compartment is bolted to the lower half flange portion 12 of the lower half portion 4 of the passenger compartment. At this time, the upper half flange portion 10 is placed on the support jig 19 and the support member 16. In other words, in this state, the upper half flange portion 10 is supported from below by the support base 15 via the support member 16, and no load is applied to the support jig 19. Therefore, the support jig 19 can be easily detached from the lower half flange portion 12 and the support member 16 by executing the jig removing step S6. In this way, a configuration in which the upper half 3 of the passenger compartment is supported on the support pedestal 15 can be obtained only by detaching the support jig 19. In other words, between the state in which the support pedestal 15 supports the lower half 4 of the vehicle compartment and the state in which the support pedestal 15 supports the upper half 3 of the vehicle compartment, The above-described configuration can be obtained without providing another support structure 6. Therefore, it is possible to reduce both the man-hour and the cost for manufacturing the vehicle compartment 2 and the steam turbine 100.

  Further, according to the configuration as described above, the height of the dividing surface P between the upper half 3 of the passenger compartment and the lower half 4 of the passenger compartment coincides with the height of the upper half flange 10 supported by the support base 15. Therefore, even if thermal expansion occurs in the passenger compartment 2, the influence on the clearance between the rotor 1 and the passenger compartment 2 is limited.

The embodiments of the present invention have been described above with reference to the drawings. However, the above embodiment is merely an example, and various modifications can be made without departing from the gist of the present invention.
For example, in the said embodiment, it demonstrated based on the example using the steam turbine 100 as a rotary machine. However, the aspect of the rotating machine is not limited to the steam turbine 100, and may be a compressor or a turbine used for a gas turbine. The same configuration and manufacturing method as described above can be applied to the compressor and turbine casing 2 as well.

DESCRIPTION OF SYMBOLS 1 ... Rotor 2 ... Vehicle compartment 3 ... Vehicle compartment upper half 4 ... Vehicle compartment lower half 4A ... Outer peripheral end surface 5 ... Turbine mount 6 ... Support structure 7 ... Inlet 8 ... Exhaust 10 ... Upper half flange 11 ... Flange lower surface 12 ... Lower half flange portion 13 ... Flange upper surface 14 ... Opening 15 ... Support base 16 ... Support member 18 ... Joint bolt 19 ... Support jig 20 ... Base 21 ... Projecting portion 22 ... Housing recess 100 ... Steam turbine A ... Axis P ... Split surface S1 ... Preparation step S2 ... Lower half installation step S3 ... Rotor installation step S4 ... Upper half installation step S5 ... Bolt joining step S6 ... Jig removal step

Claims (3)

A method of manufacturing a passenger compartment in which a rotor extending in the axial direction is inserted into an interior, and each flange portion of the upper half of the passenger compartment and the lower half of the passenger compartment are bolted together,
A base part of a support jig is detachably attached to the outer peripheral end surface of the lower half of the passenger compartment , and an accommodation recess between a pair of projecting parts projecting away from the base part in the horizontal direction toward the outer peripheral side, A preparation step for attaching the support member by detachable fitting ; and
After the preparation step, by placing only the support member out of the support jig and the support member on a support pedestal that protrudes upward from the turbine mount, the lower half of the passenger compartment is supported by the support pedestal. Lower half installation process to support
After the lower half installation step, the upper half installation step of installing the upper half of the passenger compartment so that the flange portion of the upper half of the passenger compartment is placed on the support jig and the support member;
After the upper half installation step, a bolt joining step of bolting the respective flange portions of the upper half of the passenger compartment and the lower half of the passenger compartment,
After the bolt joining step, a jig removing step of removing the support jig by removing it from the flange portion of the lower half of the passenger compartment and the support member;
A method for manufacturing a vehicle compartment including   The said support base is a manufacturing method of the vehicle interior of Claim 1 attached to the both sides of the said axial direction on the said outer peripheral end surface. A method for manufacturing a vehicle compartment according to claim 1 or 2,
After the lower half installation step, the rotor installation step of placing the rotor on the lower half of the passenger compartment;
A method of manufacturing a rotating machine including:

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