WO2017149867A1

WO2017149867A1 - Rotating machine and method for producing rotating machine

Info

Publication number: WO2017149867A1
Application number: PCT/JP2016/084992
Authority: WO
Inventors: 伸 ▲柳▼沢; 栄一柳沢; 中庭　彰宏; 伸一郎得山
Original assignee: 三菱重工コンプレッサ株式会社; 三菱重工業株式会社
Priority date: 2016-03-01
Filing date: 2016-11-25
Publication date: 2017-09-08
Also published as: JP2017155641A

Abstract

A rotating machine, wherein a disc (3) and/or a cover (4) have/has a first member (10) and a second member (11) which can be separated from one another in the axial direction (Da). The first member (10) and the second member (11) form a rotating body having a shaft as the center thereof. The first member (10) is joined to the second member (11) near the intake port (6A) and/or discharge port (6B) between the disc (3) and the cover (4).

Description

Rotating machine and method of manufacturing rotating machine

The present invention relates to a rotating machine applied to an impeller such as a supercharger, a gas turbine, an industrial compressor, a centrifugal compressor, or a pump, and a method of manufacturing the rotating machine.
This application claims priority on Japanese Patent Application No. 2016-039261 filed on Mar. 1, 2016, the contents of which are incorporated herein by reference.

For example, in the field of a centrifugal compressor operated in a corrosive environment such as a chemical process using a corrosive gas as a working fluid, there is no weld from the viewpoint of increasing the flow rate of the working fluid and preventing corrosion due to the working fluid. A piece impeller is desired. That is, it is desirable to form a predetermined shape from a base material made of a corrosion-resistant metal by machining or the like.

For example, in the three-dimensional impeller disclosed in Patent Document 1, a plurality of impeller parts having a shape obtained by dividing the impeller on a surface in a direction intersecting with the rotation shaft of the impeller is formed. In addition, this three-dimensional impeller has a divided structure for assembling these impeller components. These divided impeller parts are integrated by diffusion bonding or brazing via a contact surface.
However, in such a divided structure, the reliability based on the viewpoint of increasing the flow rate of the working fluid and preventing corrosion by the working fluid is reduced. In addition, an assembly error during manufacturing increases. For this reason, Patent Document 2 proposes an integral structure that does not cause problems due to the divided structure.

The impeller for a centrifugal compressor shown in Patent Document 2 is a structure in which a plurality of blades, a main body arranged at the root of the blade, and a shroud arranged at the tip of the blade are integrated. is there. In the centrifugal compressor impeller, slits that penetrate the shroud in the thickness direction of the shroud along the circumferential direction, or a plurality of holes that penetrate the shroud in the thickness direction of the shroud are formed in the shroud. .

JP 2004-308647 A JP 2009-156122 A

However, although the rotary machine shown in Patent Document 2 is integrally structured, slits or holes formed during processing remain. Therefore, in this rotating machine, there is a possibility that reliability of strength and hydrodynamic performance is reduced.
Moreover, in the rotary machine shown by patent document 2, the big slit which penetrates to a plate | board thickness direction along the circumferential direction remains in a shroud. Therefore, in this rotating machine, there is a possibility that reliability of strength and hydrodynamic performance is reduced.

The present invention can be formed in a unitary structure as much as possible, thereby preventing a decrease in reliability of strength and hydrodynamic performance and improving mechanical reliability. A method for manufacturing a machine is provided.

A rotating machine according to a first aspect of the present invention includes a disk that is rotatably provided integrally with a shaft body, a cover that is provided between the disk in an axial direction and a radial direction, and these disks. The fluid flowing in the axial direction from the inflow port provided between the disk and the cover in the radial direction is provided in the axial distance between the disk and the cover. A rotary machine having a plurality of blades that guide radially outward toward the outlet, wherein at least one of the disk and the cover is a first member that can be divided in the axial direction. A second member, and the first member and the second member form a rotating body centered on the shaft body, and the first member is between the disk and the cover. At least one of the inlet and outlet Coupled to said second member in Kano vicinity.

According to such a configuration, the first member and the second member can be divided by moving at least one of the disk and the cover relative to each other in the axial direction and form a rotating body centered on the shaft. have. The first member is configured to be coupled to the second member in the vicinity of at least one of the inlet and the outlet between the disk and the cover.
Thereby, the opening of the inflow port and / or the outflow port between the disk and the cover can be widened by leaving the first member unattached during rotary machining. Through this widened opening, it is possible to perform machining such as cutting or grinding with a rotary tool in a region of the internal space that is difficult to reach from the outside.
As a result, it is possible to easily form a rotary machine such as an impeller having an integral structure by machining from a block-shaped base material, and it is possible to keep the machining cost related to the region low.
Further, in the second member, the opening at the inlet and / or outlet is widened with the first member. For this reason, the entire structure is integrally formed by attaching the first member, and it is possible to prevent a decrease in the strength and hydrodynamic performance of the rotating machine during subsequent use of the rotating machine.
Further, at the time of machining, only the first member is removed in order to machine the region of the internal space that is difficult to reach from the outside, and most of the parts other than the first member are made into an integral structure (that is, a one-piece closed impeller). ). In other words, it is possible to realize an integral structure of the rotating machine by providing a minimum part of the first member.

In the rotating machine according to the second aspect of the present invention, in the first aspect, the first member may be an annular member forming a part of the cover in the vicinity of the inflow port.

In the rotating machine according to the third aspect of the present invention, in the first or second aspect, the first member may be an annular member forming a part of the cover in the vicinity of the outflow port.

In the rotating machine according to the fourth aspect of the present invention, in any one of the first to third aspects, the first member may be an annular member forming a part of the disk near the outflow port. Good.

According to such a configuration, the first member is constituted by an annular member that forms part of the cover near the inlet / outlet or an annular member that forms part of the disk near the outlet. . For this reason, at the time of machining, in order to machine the region of the internal space that is difficult to reach from the outside, only the first annular member is removed, and most of the members other than this member are integrated (ie, a one-piece closed impeller). )can do. In other words, it is possible to realize an integral structure of the rotating machine by providing a minimum part of the first member.

In the rotating machine according to the fifth aspect of the present invention, in any one of the first to fourth aspects, the first member and the second member are provided on the inner side in the radial direction and protrude in the axial direction. The first projecting portion may be connected to the second projecting portion provided on the outer side in the radial direction and projecting in the axial direction and overlapping the first projecting portion.

According to such a configuration, the first member and the second member are provided on the inner side in the radial direction and protruded in the axial direction, and provided on the outer side in the radial direction and axially provided. And a second protrusion that overlaps the first protrusion. Therefore, due to the deformation caused by the centrifugal force, one protrusion is swelled and brought into close contact with the other protrusion, and the first member and the second member can be held together.

In the rotary machine of the sixth aspect of the present invention, in the fifth aspect, the protrusion of the first member and the protrusion of the second member are coupled via a screw centered on the shaft body. May be.

According to such a configuration, the protruding portion of the first member is connected to the protruding portion of the second member via a screw centered on the axis. Therefore, after processing the rotary machine with the rotary tool, the rotary machine can be easily formed into a completed shape.

In the rotating machine of the seventh aspect of the present invention, in any one of the first to sixth aspects, the first member and the second member are elastically deformed or plastically deformed by a centrifugal force accompanying rotation. May be connected closely to each other.

In the rotating machine according to the eighth aspect of the present invention, in the first aspect, the first member is a stationary member provided on a diaphragm forming a part of a fluid flow path inside a casing of the rotating machine that supports the rotating body. The second member is formed of an opening edge near the inflow port or the outflow port of the cover, and a sealing material may be provided between the first member and the second member. .

According to such a configuration, the stationary member provided in the diaphragm that forms a part of the fluid flow path inside the casing of the rotating machine that supports the rotating body constitutes the first member, and the inflow port of the cover Since the second member is configured from the opening edge or the opening edge near the outflow port, and the sealing material is interposed between the first member and the second member, the rotary machine is installed in the diaphragm. You can easily assemble it.

According to a ninth aspect of the present invention, there is provided a rotating machine manufacturing method comprising: a disk provided so as to be rotatable integrally with a shaft body; and a cover provided between the disk in an axial direction and a radial direction. A fluid that is provided between the disc and the cover and flows in the axial direction from an inlet provided in a radial interval between the disc and the cover is allowed to flow in the axial direction between the disc and the cover. A method of manufacturing a rotary machine having a plurality of blades that guide radially outward toward outlets provided at intervals, wherein a first base material having an outer shape including the disk and a cover is formed. Inserting a rotating tool from a region corresponding to a process and a radial and axial spacing between the disk and cover to form a majority of the flow path surrounded by the disk, cover and blade And a second step of processing the base material in a range corresponding to at least a part of at least one of the disk and the cover to form an opening step portion that widens at least one of the inflow port and the outflow port of the flow path; The third step of forming a remaining part of the flow path surrounded by the disk, the cover, and the blade by inserting a rotary tool into the flow path through the opening step, and the second process. And a fourth step of forming a flow path surrounded by the disk, the cover, and the blade by attaching an annular member forming at least one of the disk and the cover to the opening step.

According to such a configuration, a base material having an outer shape including a disk and a cover is formed in the first step.
Thereafter, in the second step, the rotary tool is inserted from a region corresponding to the radial and axial distance between the disk and the cover, and most of the flow path surrounded by the disk, the cover, and the blade is While being formed, by omitting at least one part of the disk and the cover, an opening step portion that widens the inflow port or the outflow port of the flow path is formed.
Thereafter, in the third step, the rotary tool is inserted into the flow path through the opening step, and the remaining part of the flow path surrounded by the disk, the cover, and the blade is formed.
Thereafter, in the fourth step, an annular member that forms at least one of the disc and the cover is attached to the opening step portion formed in the second step, so that the flow path is surrounded by the disc, the cover, and the blade. Is completed.
That is, in the manufacturing method of the rotary machine having the above-described configuration, the first member is not attached at the time of rotary machining in the third step. Thereby, the opening part of the inflow port and / or outflow port between a disk and a cover can be expanded. Through this widened opening, machining with a rotary tool can be performed in an area of the internal space that is difficult to reach from the outside. As a result, it is possible to easily form a rotary machine such as an impeller having an integral structure by machining from a block-shaped base material, and it is possible to keep the machining cost related to the region low.
Further, in the second member, the opening at the inlet and / or outlet is widened with the first member. For this reason, the entire structure is integrally formed by attaching the first member, and the strength of the rotating machine can be prevented from lowering when the rotating machine is used thereafter.
Further, at the time of machining, only the first member is removed in order to machine the region of the internal space that is difficult to reach from the outside, and most of the parts other than the first member are made into an integral structure (that is, a one-piece closed impeller). ). In other words, it is possible to realize an integral structure of the rotating machine by providing a minimum part of the first member.

In the present invention, since the second member has a structure in which the expanded opening of the inlet and / or outlet is filled with the first member, the whole is integrally formed by attaching the first member, and thereafter It is possible to prevent a decrease in strength and hydrodynamic performance of the rotating machine when the rotating machine is used.
Further, in the present invention, at the time of processing, only the first member is removed in order to machine the region of the internal space that is difficult to reach from the outside, and most of the first member except the first member is made into an integral structure (that is, 1 piece closed impeller). In other words, it is possible to realize an integral structure of the rotating machine by providing a minimum part of the first member.

It is a top view which shows the impeller which concerns on 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a part of explanatory drawing which shows the manufacturing method of the impeller which concerns on this invention in process order. It is a top view which shows the impeller which concerns on 2nd Embodiment of this invention. FIG. 5 is a sectional view taken along line VV in FIG. 4. FIG. 6 is an enlarged view of FIG. 5. It is a top view which shows the impeller which concerns on 3rd Embodiment of this invention. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7. It is an enlarged view of FIG. It is a top view which shows the impeller which concerns on 4th Embodiment of this invention. It is sectional drawing which follows the XI-XI line of FIG. It is an enlarged view of FIG.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3A, 3B, 3C, 3D, 3E, and 3F.
1 and 2 show an impeller 1 that is a rotating machine 100 according to the first embodiment. The impeller 1 includes a disk 3 provided so as to be rotatable integrally with the hub 2, a cover 4 provided at an interval to the disk 3, and a wing member provided between the disk 3 and the cover 4. And a plurality of blades 5.

The disk 3 is provided integrally with the hub 2. The disk 3 is fixed to a shaft body C serving as a rotating shaft via the hub 2.
The cover 4 is provided between the disk 3 at intervals in the axial direction Da and the radial direction Dr. A flow path 6 serving as an internal space is formed between the cover 4 and the disk 3. The flow path 6 is provided with the disk 3 and the cover 4 so that the interval in the axial direction Da is sequentially reduced outward in the radial direction Dr.
The blade 5 is a blade member that guides the working fluid from the distance in the radial direction Dr between the disk 3 and the cover 4 to the distance in the axial direction Da between the disk 3 and the cover 4 when the disk 3 rotates. . The blade 5 thereby guides the working fluid toward the outside shown in the direction of arrow A in FIGS. 1 and 2.

The cover 4 is provided with a cap 10 serving as a first member.
The cap 10 is formed in a rotating body centered on the axis O of the disk 3. In addition, the cap 10 is an annular hole filling member fixed to the cover 4 serving as a second member. The cap 10 is installed on the opening edge 11 of the cover 4 located in the vicinity of the working fluid inlet 6A.
The opening edge portion 11 becomes an opening step portion 12 that widens the inlet 6A of the flow path 6 by omitting a part of the cover 4. The cap 10 described above is attached to the opening step 12.
The cap 10 is not attached when the impeller is manufactured, so that the opening edge 11 of the inflow port 6A between the disk 3 and the cover 4 can be widened. Therefore, it is possible to perform cutting with a rotary tool in the region of the internal space that is difficult to reach from the outside through the widened opening edge 11. As a result, in this example, a rotary machine such as an impeller having an integral structure can be easily formed by cutting from a block-shaped base material.

The cap 10 is provided with a protruding portion 10A that is located inside the radial direction Dr and protrudes in the axial direction Da. In addition, the opening edge portion 11 of the cover 4 is provided with a protruding portion 10A that is located outside the radial direction Dr of the cap 10 and protrudes in the axial direction Da.
The protruding portion 10A of the cap 10 and the protruding portion 11A of the cover opening edge portion 11 are arranged so as to overlap each other in the radial direction Dr. With such an arrangement, when a centrifugal force is applied, the protruding portion 10A of the cap 10 swells and comes into close contact with the protruding portion 11A of the cover opening edge portion 11.
In addition, a screw 13 (see FIG. 3F) centering on the axis O of the disk 3 is provided between the protrusion 10A of the cap 10 and the protrusion 11A of the cover opening edge 11. The cap 10 can be easily attached to the opening edge 11 of the cover 4 by the coupling via the screw 13.

It should be noted that the cap 10 may be brought into close contact with the cover opening edge 11 by elastic deformation or plastic deformation.

Next, a method for manufacturing the impeller 1 (one-piece closed impeller) that becomes the rotating machine 100 will be described with reference to FIGS. 3A to 3F.
[First step]
After preparing the metal block 7 which is a base material shown in FIG. 3A, as shown in FIG. 3B, the impeller 1 is processed into an approximate shape by a rotary tool D such as an end mill.

[Second step]
Next, as shown in FIG. 3C, the rotary tool D is inserted from the area corresponding to the distance between the disk 3 and the cover 4 in the radial direction Dr and the axial direction Da, and the disk 3, the cover 4, and the blade 5 forms the majority of the flow path 6 surrounded by 5. At the same time, by omitting the opening edge 11 on the inlet 6 A side of the disk 3, an opening step portion 12 that widens the inlet 6 A of the channel 6 is formed.
At this time, a protruding portion 10A protruding in the axial direction Da is provided on the opening edge portion 11 of the cover 4, and a protruding portion 10A of the cap 10 described later overlaps with the protruding portion 10A.
Here, the cap 10 is provided with a protruding portion 10A that is located inside the radial direction Dr and protrudes in the axial direction Da. In addition, a protruding portion 10 A is provided at the opening edge 11 of the cover 4 so as to protrude outside the radial direction Dr of the cap 10 and protrude in the axial direction Da. Thereby, these protrusion parts 10A and the protrusion part 11A of the cover opening edge part 11 are set to a positional relationship overlapping each other in the radial direction Dr.

[Third step]
Next, as shown in FIG. 3D, the rotary tool D is inserted into the flow path 6 through the opening step 12 of the cover opening edge 11, and the flow path 6 surrounded by the disk 3, the cover 4, and the blade 5. The remaining portion (the portion that could not be cut in the second step) is formed.

[Fourth step]
Next, as shown in FIGS. 3E and F, an annular cap 10 that forms a part of the cover 4 is attached to the opening step portion 12 formed in the second step, so that it is surrounded by the disk 3, the cover 4, and the blade 5. The completed flow path 6 is completed.
Here, a screw 13 (see FIGS. 3E and 3F) centered on the axis O of the disk 3 is provided between the protrusion 10A of the cap 10 and the protrusion 11A of the cover opening edge 11. The cap 10 can be attached to the opening edge 11 of the cover 4 by the coupling via the screw 13.

As described above in detail, according to the first embodiment, the disk 10 and the cover 4 can be removed by removing the cap 10 from the opening edge 11 of the cover 4 during the rotary machining process in the third step. The opening of the inlet 6A can be widened. Through this widened opening, cutting with the rotary tool D can be performed in a region of the internal space that is difficult to reach from the outside. As a result, in the present embodiment, a rotary machine such as an impeller having an integral structure can be easily formed by cutting from a block-shaped base material, and the processing cost related to the region can be kept low. .

The first embodiment is a structure in which the opening edge 11 of the inflow port 6 A of the flow path 6 is filled with the cap 10 in the cover 4. Therefore, the entire structure is integrated by attaching the cap 10, and it is possible to prevent a decrease in the strength and hydrodynamic performance of the rotating machine when the rotating machine is used thereafter.
In the first embodiment, at the time of processing, the cap 10 is simply removed in order to cut an area of the internal space that is difficult to reach from the outside. Impeller). In other words, it is possible to realize an integral structure of the rotating machine by providing the minimum portion of the cap 10.

In the first embodiment, the cap 10 and the opening edge 11 of the cover 4 are provided on the inner side in the radial direction Dr and provided on the outer side in the radial direction Dr. It is connected via a protrusion 11A that protrudes in the axial direction Da and overlaps the protrusion 10A. Therefore, the protrusion 10 A swells and is brought into close contact with the protrusion 11 A due to deformation due to centrifugal force, and the cap 10 and the opening edge 11 of the cover 4 can be held together.
In the first embodiment, the protruding portion 10 A of the cap 10 is coupled to the protruding portion 11 A of the cover opening edge 11 via a screw 13 centered on the axis O. Therefore, after processing the rotary machine with the rotary tool D, the rotary machine can be easily formed into a completed shape.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. In the following description, the same reference numerals are given to portions that share the same configuration as the first embodiment, and redundant descriptions are omitted.
The impeller 20 to be the rotary machine 101 according to the second embodiment is different from the impeller 1 of the first embodiment in that the opening edge 21 of the cover 4 is provided not on the inlet 6A of the flow path 6 but on the outlet 6B side. The cap 22 is attached to the outlet 6 B of the flow path 6.

Similar to the cap 10, the cap 22 is formed in a rotating body centered on the axis O of the disk 3. The cap 22 is an annular hole filling member fixed to the cover 4 serving as a second member. The cap 22 is installed at the opening edge 21 of the cover 4 located in the vicinity of the working fluid outlet 6B.
The opening edge portion 21 becomes an opening step portion 23 that widens the outlet 6B of the flow path 6 by omitting a part of the cover 4. The aforementioned cap 22 is attached to the opening step 23.

And this cap 22 can be opened at the time of manufacturing the impeller, so that the opening edge 21 of the outlet 6B between the disk 3 and the cover 4 can be widened. Therefore, it is possible to perform cutting with a rotary tool in the region of the internal space that is difficult to reach from the outside through the widened opening edge 21. As a result, in this example, a rotary machine such as an impeller having an integral structure can be easily formed by cutting from a block-shaped base material.

A protrusion 22 A is provided inside the cap 22 in the radial direction Dr. A protrusion 21 A is provided on the outer side of the opening edge 21 of the cover 4 in the radial direction Dr. With such an arrangement of the

protrusions

21A and 22A, when a centrifugal force acts, the protrusion 22A of the cap 22 swells and can be brought into close contact with the protrusion 21A of the cover opening edge 21.
A screw (not shown) centered on the axis O of the disk 3 may be provided between the projecting

portions

21A and 22A.
Further, the cap 22 may be brought into close contact with the cover opening edge 21 by elastically deforming or plastically deforming the cap 22.

As described in detail above, the second embodiment has a structure in which the opening edge 21 of the outlet 6 B of the flow path 6 is filled with the cap 22 in the cover 4. For this reason, the entire structure is integrated by attaching the cap 22, and it is possible to prevent a decrease in the strength and hydrodynamic performance of the rotating machine when the rotating machine is used thereafter.
In the second embodiment, at the time of processing, the cap 22 is simply removed in order to cut an area of the internal space that is difficult to reach from the outside. Impeller). That is, it is possible to realize an integral structure of the rotating machine by providing the minimum portion of the cap 22.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. In the following description, the same reference numerals are given to portions that share the same configuration as the previous embodiment, and redundant descriptions are omitted.
The impeller 30 serving as the rotating machine 102 according to the third embodiment is different from the impeller 20 of the second embodiment in that an opening edge 31 for widening the opening is provided on the disk 3 side instead of the cover 4 side. The point is that the cap 32 is attached to the disk 3.

Similar to the

caps

10 and 22 described above, the cap 32 is formed in a rotating body centered on the axis O of the disk 3. The cap 32 is an annular hole-filling member that is fixed to the disk 3 that is the second member. The cap 32 is installed at the opening edge 31 of the disk 3 located near the working fluid outlet 6B.
The opening edge 31 is for forming an opening step 33 that widens the outlet 6B of the flow path 6 by omitting a part of the disk 3.

And this cap 32 can be opened at the time of manufacturing the impeller, so that the opening edge 31 of the outlet 6B between the disk 3 and the cover 4 can be widened. Therefore, it is possible to perform cutting with a rotary tool in the region of the internal space that is difficult to reach from the outside through the widened opening edge 31. As a result, in this example, a rotary machine such as an impeller having an integral structure can be easily formed by cutting from a block-shaped base material.

A screw (not shown) centered on the axis O of the disk 3 may be provided between the cap 32 and the disk 3 so that the cap 32 can be easily mounted via the screw.
The cap 32 may be brought into close contact with the cover opening edge 31 by applying an external force to be elastically deformed or plastically deformed.

As described above in detail, the third embodiment has a structure in which the opening edge 31 in which the outlet 6B of the flow path 6 is widened is filled with the cap 32 in the disk 3. For this reason, the entire structure is integrated by attaching the cap 32, and it is possible to prevent a decrease in the strength and hydrodynamic performance of the rotating machine during subsequent use of the rotating machine.
In the third embodiment, at the time of processing, the cap 32 is simply removed in order to cut an area of the internal space that is difficult to reach from the outside. Impeller). That is, it is possible to realize an integral structure of the rotating machine by providing the minimum portion of the cap 22.

(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIGS. In the following description, the same reference numerals are given to portions that share the same configuration as the previous embodiment, and redundant descriptions are omitted.
The impeller 40 which becomes the rotary machine 103 according to the fourth embodiment is different from the

impellers

1, 20 and 30 of the previous embodiment in that the stationary member 50 is used as a cap of the first member.

The stationary member 50 is provided on a diaphragm 51 which is an interior product of the rotary machine body. Similar to the

caps

10, 22, and 32 described above, the stationary member 50 is formed in a rotating body centered on the axis O of the disk 3. The stationary member 50 is installed in the opening edges 52 and 53 of the cover 4 serving as the second member.
The opening

edge portions

52 and 53 become opening

step portions

54 and 55 that widen the inflow port 6A and the outflow port 6B of the flow path 6 when a part of the cover 4 is omitted. The stationary member 50 described above is disposed in the

opening step portions

54 and 55.

The stationary member 50 is not attached when the impeller is manufactured, so that the inlet 6A of the flow path 6 and the opening edges 52 and 53 of the outlet 6B between the disk 3 and the cover 4 can be widened. . Therefore, it is possible to perform cutting with a rotary tool in the region of the internal space that is difficult to reach from the outside through the widened opening

edges

52 and 53. As a result, in this example, a rotary machine such as an impeller having an integral structure can be easily formed by cutting from a block-shaped base material.
Further, in a state where the impeller 40 serving as the rotating machine 103 is assembled to the diaphragm 51 serving as the interior product of the rotating machine main body, the opening

edge portions

52 and 53 of the impeller 40 and the stationary member 50 of the diaphragm 51 are interposed. Are provided with sealing

members

56 and 57 for ensuring sealing.

As described above in detail, in the fourth embodiment, the stationary member 50 provided on the diaphragm 51 serving as an interior part of the rotating machine main body is used as a cap. Further, sealing

materials

56 and 57 are provided at the opening edges 52 and 53 of the inlet 6A and the outlet 6B of the cover 4.
Thereby, in 4th Embodiment, the impeller 40 used as the rotary machine 103 can be couple | bonded with the opening

edge parts

52 and 53 of the cover 4 only by installing in the diaphragm 51, and the assembly workability | operativity can be improved. it can.

Further, the fourth embodiment has a structure in which the opening edges 52 and 53 in which the inflow port 6 A and the outflow port 6 B are widened are filled with the stationary member 50 of the diaphragm 51 in the cover 4. Therefore, the entire structure is integrally formed by the arrangement of the stationary member 50, and it becomes possible to prevent a decrease in reliability of strength and hydrodynamic performance of the rotating machine when the rotating machine 103 is used thereafter.
Further, in the fourth embodiment, at the time of processing, most of the parts excluding the attachment position of the stationary member 50 are made into an integral structure only by removing the diaphragm 51 from the diaphragm 51 in order to machine the region of the internal space that is difficult to reach from the outside (that is, 1 piece closed impeller). In other words, it is possible to realize an integral structure of the rotating machine only by providing a minimum part of the stationary member 50 as an attachment location.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included.

The present invention relates to a rotating machine applied to an impeller of a centrifugal compressor such as a supercharger, a gas turbine, or an industrial compressor, and a method of manufacturing the rotating machine.

1 impeller
3 Disc 4 Cover 5 Blade 6 Flow path 6A Inlet 6B Outlet 10 Cap (first member)
10A protrusion 11 opening edge (second member)
11A protrusion 12 opening step (second member)
13 Screw 20 Impeller 21 Opening edge 21A Projection 22 Cap (first member)
22A Protruding portion 23 Opening step portion (second member)
30 Impeller 31 Opening edge (second member)
32 Cap (first member)
50 Stationary member (first member)
51 Diaphragm 52 Opening edge (second member)
53 Opening edge (second member)
54 Opening step (second member)
55 Opening step (second member)
DESCRIPTION OF SYMBOLS 100 Rotating machine 101 Rotating machine 102 Rotating machine 103 Rotating machine C shaft body D Rotating tool O Axis line

Claims

A disc provided to be rotatable integrally with the shaft body;
A cover provided between the disc in an axial direction and a radial direction;
The fluid that is provided between the disc and the cover and flows in the axial direction from an inlet provided at a radial interval between the disc and the cover is allowed to flow in the axial direction between the disc and the cover. A rotating machine having a plurality of blades that guide radially outward toward the outlets provided at intervals,
At least one of the disk and the cover has a first member and a second member that can be divided in the axial direction.
The first member and the second member form a rotating body centered on the shaft body,
The first member is a rotating machine coupled to the second member in the vicinity of at least one of an inlet and an outlet between the disk and the cover.
The rotary machine according to claim 1, wherein the first member is an annular member that forms a part of the cover in the vicinity of the inflow port.
The rotary machine according to any one of claims 1 and 2, wherein the first member is an annular member that forms a part of the cover in the vicinity of the outflow port.
The rotary machine according to any one of claims 1 to 3, wherein the first member is an annular member forming a part of the disk in the vicinity of the outlet.
The first member and the second member include a first protrusion provided on the inner side in the radial direction and protruding in the axial direction, and provided on the outer side in the radial direction and protruding in the axial direction. The rotating machine according to any one of claims 1 to 4, wherein the rotating machine is connected via a second protrusion overlapping the protrusion.
6. The rotating machine according to claim 5, wherein the protruding portion of the first member and the protruding portion of the second member are coupled to each other via a screw centered on the shaft body.
7. The first member and the second member according to claim 1, wherein the first member and the second member are in close contact with each other by elastic deformation or plastic deformation by centrifugal force accompanying rotation. Rotating machine.
The first member comprises a stationary member provided in a diaphragm that forms part of a fluid flow path inside a casing of a rotating machine that supports the rotating body,
The second member consists of an opening edge near the inlet or outlet of the cover,
The rotating machine according to claim 1, wherein a sealing material is provided between the first member and the second member.
A disc provided to be rotatable integrally with the shaft body;
A cover provided between the disc in an axial direction and a radial direction;
A fluid that is provided between the disc and the cover and flows in the axial direction from an inlet provided in a radial interval between the disc and the cover is allowed to flow in the axial direction between the disc and the cover. A plurality of blades that guide radially outward toward the outlets provided at intervals, and a method of manufacturing a rotary machine,
Forming a base material having an outer shape including the disk and a cover;
A rotary tool is inserted from a region corresponding to the radial and axial spacing between the disk and the cover to form most of the flow path surrounded by the disk, the cover, and the blade, and the disk A second step of processing the base material in a range corresponding to at least one part of the cover to form an opening step portion that widens at least one of the inflow port and the outflow port of the flow path;
A third step of inserting a rotating tool into the flow path through the opening step to form the remaining portion of the flow path surrounded by the disk, cover and blade;
A fourth channel forming a flow path surrounded by the disk, the cover, and the blade is formed by attaching an annular member that forms at least one of the disk and the cover to the opening step formed in the second step. A method of manufacturing a rotating machine.