JP2007146715A - Turbocharger and fluid device for turbocharger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low cost fluid device for a turbocharger. <P>SOLUTION: The fluid device for the turbocharger includes wheels 32, 34 acting on fluid and housings 14, 24 surrounding an outer circumference of the wheels 32, 34 and constructing a flow path of fluid. Spaces 40, 50 in the housings 14, 24 share an axis L with the wheels 32, 34 and has a rotationally symmetric shape in relation to the axis L. A low cost turbocharger 10 can be provided by including the fluid devices for the turbocharger on a turbine 16 side and a compressor 12 side, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a turbocharger fluid device having a wheel that acts on a fluid and a housing that surrounds the outer periphery of the wheel and forms a flow path for the fluid, and a turbocharger having the turbocharger fluid device.

  A turbocharger has a turbine and a compressor, and a general housing thereof includes a turbine housing in which a turbine wheel is accommodated, a compressor housing in which a compressor impeller is accommodated, and a rotor shaft that connects the turbine wheel and the compressor impeller. It is generally composed of a center housing that is rotatably supported (see, for example, Patent Document 1). The cross-sectional area of the spiral channel in such a turbine housing is designed to gradually shrink towards the turbine wheel so that energy is efficiently extracted from the exhaust gas through the turbine wheel housed in it. Yes. Similarly, the cross-sectional area of the spiral flow path in the compressor housing is designed to gradually expand as it moves away from the compressor impeller so as to properly energize the air drawn in by the compressor impeller accommodated therein. . Such a turbocharger housing is generally manufactured by casting.

JP 2003-97281 A

  By the way, it is not always necessary that all turbochargers have excellent performance, and depending on the vehicle to which the turbocharger is applied, it may be desired that it is cheaper than excellent performance.

  Therefore, an object of the present invention is to provide a turbocharger fluid device used for providing an inexpensive turbocharger. Furthermore, an object of the present invention is to provide a turbocharger manufactured at a low cost.

  To achieve the above object, a turbocharger fluid device according to the present invention comprises a wheel that acts on the fluid, and a housing that surrounds the outer periphery of the wheel and forms a flow path for the fluid. The space in the housing has a common axis with the wheel and is rotationally symmetric with respect to the axis.

  With the above configuration, since the space in the housing is rotationally symmetric, the design and manufacture can be facilitated, and the turbocharger fluid device can be manufactured at low cost. Therefore, an inexpensive turbocharger can be provided using this.

  More preferably, the radial cross-sectional shape of the space in the housing is rectangular. Thereby, it becomes possible to suppress the surrounding dead space when the housing is installed.

  In particular, the housing has a housing main body adjacent to the outer side in the radial direction of the wheel, and a shroud member adjacent to the wheel in the axial direction, and the housing main body and the shroud member are combined. And preferred. As a result, the housing is divided into parts that can be manufactured more inexpensively and easily, and by combining them, the housing can be manufactured at low cost.

  In this case, at least one of the housing body and the shroud member may be manufactured by plastic working. That is, it becomes possible to produce at least one of the housing body and the shroud member by plastically processing various existing plate materials and pipe materials. Therefore, the housing can be manufactured at a lower cost.

  The space in the housing may include a partition portion for directing the fluid in a tangential direction of an outer end portion of the flow path of the housing. Thereby, the fluid is directed in the tangential direction of the flow path outer end portion of the housing.

  It is preferable to provide a turbocharger having the above-described various turbocharger fluid devices on the turbine side and the compressor side. Since the turbocharger has the inexpensive turbocharger fluid device on both the turbine side and the compressor side as described above, the turbocharger is manufactured at a low cost as a whole.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to the invention will be described with reference to the accompanying drawings.
First, a turbocharger fluid device according to the present invention and a turbocharger using the same will be described based on a first embodiment. FIG. 1 schematically shows a turbocharger 10 according to the first embodiment. FIG. 1A is a sectional side view of the turbocharger 10, and FIG. 1B is a turbo view of FIG. 2 is a side view of the compressor housing 14 of the compressor 12 of the charger 10. FIG. FIG. 2 is a schematic cross-sectional view of the compressor housing 14 of FIG. 1 (b) along the line AA of FIG. 1 (a). Further, FIG. 3 is a schematic exploded perspective view of the compressor housing 14 of FIGS. 1 and 2. The turbocharger 10 includes a compressor 12 and a turbine 16.

  As shown in FIG. 1A, the turbocharger 10 includes a housing 18 and a turbo rotor 20. The housing 18 includes a center housing 22, a turbine housing 24 and a compressor housing 14. A turbine chamber 26 is formed by the center housing 22 and the turbine housing 24, and a compressor chamber 28 is formed by the center housing 22 and the compressor housing 14.

  The turbo rotor 20 includes a rotor shaft 30, a turbine wheel 32 is fixed to one end thereof, and a compressor impeller 34 is fixed to the other end. The rotor shaft 30 is rotatably supported by a pair of bearings 36 provided in the center housing 22. The turbine wheel 32 includes a plurality of blades 32 a and is disposed in the turbine chamber 26. The compressor impeller 34 includes a plurality of blades 34 a and is disposed in the compressor chamber 28.

  The turbine housing 24 is provided with an exhaust inlet 38, an exhaust annular passage 40, an exhaust introduction passage 42, and an exhaust outlet 44. The exhaust annular passage 40 is formed in a substantially annular shape along the outer periphery of the turbine chamber 26, and an exhaust pipe of an engine (not shown) is connected to the exhaust inlet 38 on the introduction side. The exhaust introduction passage 42 communicates the periphery of the turbine chamber 26 with the exhaust annular passage 40. The exhaust outlet 44 is formed to extend in the direction of the axis (axis) L of the turbine chamber 26 and is connected to an exhaust pipe (not shown). Then, the exhaust gas introduced into the exhaust annular passage 40 from the exhaust pipe when the engine is operated is introduced into the turbine chamber 26 from the exhaust introduction passage 42 while moving around the turbine chamber 26 along the exhaust annular passage 40. The Then, by rotating the turbine wheel 32, the exhaust gas changes its direction at right angles in the turbine chamber 26 and is discharged from the exhaust outlet 44 to the exhaust pipe. Both the exhaust annular passage 40 and the exhaust introduction passage 42 are substantially annular and are rotationally symmetric with respect to the axis L of the turbine wheel 32.

  On the other hand, the compressor housing 14 is provided with an intake inlet 46, an intake outlet passage 48, an intake annular passage 50, and an intake outlet 52. The intake inlet 46 is formed so as to extend in the direction of the axis L of the compressor chamber 28, and an end portion of an intake pipe (not shown) connected thereto is opened to the atmosphere via an air cleaner or the like (not shown). The intake annular passage 50 is formed in a substantially annular shape along the outer periphery of the compressor chamber 28, and an intake outlet 52 serving as a supply outlet thereof is connected to an intake pipe (not shown). The intake lead-out passage 48 communicates the periphery of the compressor chamber 28 with the intake annular passage 50. Then, when the turbo rotor 20 is rotated by the exhaust gas introduced into the turbine chamber 26, the compressor impeller 34 rotates to pump outside air from the compressor chamber 28 to the intake annular passage 50 through the intake outlet passage 48 and through the intake inlet 46. New outside air is introduced into the compressor chamber 28. Note that both the intake outlet passage 48 and the intake annular passage 50 are substantially annular and are rotationally symmetric with respect to the axis L of the compressor wheel 34 that coincides with the axis L of the turbine wheel 32.

  As described above, the turbocharger fluid device according to the embodiment of the present invention is provided on the turbine 16 side and the compressor 12 side of the turbocharger 10, respectively. That is, a turbocharger fluid device having a turbine wheel 32 that acts on exhaust gas and a turbine housing 24 that surrounds the outer periphery of the turbine wheel 32 and forms a flow path of exhaust gas is provided at one end of the turbocharger 10. A turbine 16 is provided. On the other side of the turbocharger 10 on the opposite side, a compressor impeller 34 that can also be referred to as a compressor wheel that acts on air, a compressor housing 14 that surrounds the outer periphery of the compressor impeller 34 and forms an air flow path, A compressor 12 which is a fluid device for a turbocharger having the above is provided.

  Although the turbine housing 24 and the compressor housing 14 have different uses as described above, they have substantially the same configuration. First, the compressor housing 14 will be described.

  The compressor housing 14 includes a housing main body 54 adjacent to the radially outer side of the compressor impeller 34 and a shroud member 56 adjacent to the compressor impeller 34 in the axial direction, and the housing main body 54 and the shroud member 56 are coupled to each other. Is. The housing main body 54 is made of a casting, and the ring-shaped portion 58 and the extending portion 60 are integrally formed in advance. The shroud member 56 is also made of cast material.

  The ring-shaped portion 58 of the housing main body 54 has a common shaft center L with the compressor impeller 34 accommodated therein, and has a rotationally symmetrical shape with respect to the shaft center L. The intake annular passage 50 defined therein by the ring-shaped portion 58 has a common shaft center L with the compressor impeller 34 and has a rotationally symmetrical shape with respect to the shaft center L. . Therefore, in FIG. 2, the distances from the axis L to the points α and β on the same cross section orthogonal to the axis L are the same on the peripheral wall 62 of the ring-shaped part 58. is there. Further, as clearly shown in FIG. 1 (a), the radial cross-sectional shape of the intake annular passage 50 in the compressor housing 14 that is defined by the ring-shaped portion 58 is generally rectangular. The part 58 has a substantially cylindrical shape. The intake lead-out passage 48 is formed on the inner side in the radial direction of the intake annular passage 50 as described above, and the intake lead-out passage 48 is larger than the width of the intake annular passage 50 in the direction of the axis L. Also have a fairly narrow width.

  The extended portion 60 extending from the ring-shaped portion 58 includes an outlet side flange portion 64 at the end farthest from the ring-shaped portion 58, and the other portion is generally cylindrical. Since the extending portion 60 communicates with the outermost peripheral portion of the ring-shaped portion 58 along the tangential direction, the air flowing through the intake annular passage 50 is tangential to the flow path outer end portion of the intake annular passage 50. To the intake outlet 52 that is defined by the extending portion 60. In addition, the base part of the extension part 60, that is, the communication part 66 with the ring-shaped part 58, may have a rectangular cross section.

  An inwardly projecting flange portion 68 (see FIG. 3) is provided on the innermost side in the radial direction of the ring-shaped portion 58, and the inner diameter of the flange portion 68 is slightly smaller than the outer diameter of the compressor impeller 34. This allows the compressor impeller 34 to pass inside the flange portion 68 during assembly.

  The shroud member 56 is provided in the compressor 12 to define an air inlet to the compressor 12. The shroud member 56 includes an inlet flange portion 70, a joint flange portion 72 that forms a joint portion with the ring-shaped portion 58, and a cylindrical portion 74 that is accommodated in the ring-shaped portion 58. The cylindrical portion 74 has a shape that follows the rotational path contour of the curved end edge 34 b called the shroud portion of the blade 34 a of the compressor impeller 34 on the radially inner side surface. In the present specification, the curved edge 34b of the blade 34a between the straight edge 34c extending in the axial direction of the outermost periphery of the blade 34a and the straight edge 34d extending in the radial direction on the shaft end side , Referred to as the shroud section.

Here, the assembly order of the compressor 12 that is a fluid device for a turbocharger will be described below.
(1) First, the compressor impeller 34 is attached to one end portion of the rotor shaft 30 with the compressor side plate portion 76 located at one end portion of the center housing 22 in the back.
(2) Secondly, the housing main body 54 composed of the ring-shaped portion 58 and the extending portion 60 is moved in the direction of the axis L so as to be adjacent to the radially outer side of the compressor impeller 34, and the compressor side plate It is connected to the portion 76 with a bolt and nut CB1.
(3) Third, the shroud member 56 is moved in the direction of the shaft center L so as to be adjacent to the compressor impeller 34 in the direction of the shaft center L, and is coupled to the housing main body 54 by the bolt nut CB2.

  Through this process, the compressor 12 is assembled. Note that the order of (1) and (2) above may be reversed.

Next, the configuration of the turbine 16 will be described below.
The turbine housing 24 includes a housing main body 80 adjacent to the radially outer side of the turbine wheel 32 and a shroud member 82 adjacent to the turbine wheel 32 in the axial direction, and the housing main body 80 and the shroud member 82 are coupled to each other. Is. In addition, the housing main body 80 of the turbine housing 24 is produced by previously integrating the ring-shaped portion 84 and the extending portion 86 in the same manner as the housing main body 54 of the compressor housing 14.

  The housing main body 80 is made of cast, and the ring-shaped portion 84 has a common axis L with the turbine wheel 32 accommodated therein, and has a rotationally symmetric shape with respect to the axis L. The exhaust annular passage 40, which is a space defined by the ring-shaped portion 84, has the turbine impeller 32 and the shaft center L in common and has a rotationally symmetric shape with respect to the shaft center L. The exhaust annular passage 40, which is a space in the turbine housing 24 and defined by the ring-shaped portion 84, has a generally rectangular cross-sectional shape in the radial direction, and the ring-shaped portion 84 is substantially cylindrical in the direction of the axis L. It has the shape of An exhaust outlet passage 42 is formed on the inner side in the radial direction of the exhaust annular passage 40 over the entire circumference. The exhaust outlet passage 42 is considerably larger than the width of the exhaust annular passage 40 in the direction of the axis L. It has a narrow width.

  On the other hand, the extended portion 86 extending from the ring-shaped portion 84 includes an inlet-side flange portion 88 at the end farthest from the ring-shaped portion 84, and the other portion is generally cylindrical. Since the extending portion 86 communicates along the tangential direction of the outermost peripheral portion of the ring-shaped portion 84, the exhaust gas flowing through the exhaust annular passage 40 flows from the tangential direction of the flow passage outer end portion of the exhaust annular passage 40. The exhaust annular passage 40 is entered. The base part of the extension part 86, that is, the communication part 90 with the ring-shaped member 84, may have a rectangular cross section.

  The turbine 16 includes a shroud member 82 to define the exhaust gas outlet of the turbine 16. The shroud member 82 is made of cast and has an outlet flange portion 92, a joint flange portion 94 that forms a joint portion with the ring-shaped portion 84, and a cylindrical portion 96 that is accommodated in the ring-shaped portion 84. is doing. The cylindrical portion 96 has a shape that follows the rotational path contour of the curved end edge 32 b called the shroud portion of the blade 32 a of the turbine wheel 32 on the radially inner side surface. In the present specification, the curved end edge 32b of the blade 32a between the straight edge extending in the axial direction of the outermost periphery of the blade 32a and the straight edge extending in the radial direction on the shaft end side is the shroud. It is called a part.

  The assembly order of the turbine 16 is the same as the above-described assembly order of the compressor 12, or the order of (1), (2) and (3), or the order of (2), (1) and (3). Is in order.

The effects of the turbocharger 10 according to the first embodiment will be described below.
As described above, the compressor housing 14 does not have a spiral air flow path unlike the conventional compressor housing, and instead, the compressor impeller 34 and the shaft center L are in common, and the shaft center L Since the intake annular passage 50 is rotationally symmetric, the shape of the compressor housing 14 is simplified. Therefore, the design cost required for the production and the production cost of the mold are greatly reduced, and the overall production cost of the compressor housing 14 is also reduced. Further, in the first embodiment, since the shape of the compressor housing 14 is not complicated as described above, the compressor housing 14 can be easily and accurately manufactured, for example, by plastic processing of a plate material or a pipe material. On the other hand, the same effect as that related to the compressor housing 14 is recognized also in the turbine housing 24. As described above, since both the compressor 12 and the turbine 16 which are fluid devices for turbochargers are provided at low cost, the entire turbocharger 10 is provided at low cost.

  Further, as described above, the compressor housing 14 and the turbine housing 24 have substantially the same shape, and the shapes thereof are very simple. Therefore, the members of the compressor housing 14 and the turbine housing 24 can be shared. It becomes possible. For example, the housing main bodies 54 and 80 can be used in common, and the same housing main body can be used as long as the wheels 34 and 32 accommodated therein have the same diameter, size, and the like. The shroud members 56 and 82 can also use a common shroud member as long as the diameters of the wheels such as the compressor impeller 34 and the turbine wheel 32 and the diameters of the intake inlet 46 and the exhaust outlet 44 are the same. Therefore, it is possible to reduce the production type, production cost, and the like, and as a result, it is possible to produce a turbocharger fluid machine and a turbocharger using the turbocharger at low cost.

  In addition, the ring-shaped portions 58 and 84 are divided in half at the portion corresponding to the line AA in FIG. 1, and they are integrally formed by welding, bolts and nuts, etc. The housings 14 and 24 can be easily manufactured. An example of such a case will be described below.

  Next, a second embodiment of a turbocharger fluid device and a turbocharger using the same according to the present invention will be described. In the turbocharger 210 of the second embodiment, since the compressor housing 212 and the turbine housing 214 are different from those of the first embodiment, the same reference numerals are used for the same configurations as those of the first embodiment. Only the differences will be described below. However, in the turbocharger housing 216 of the second embodiment, the compressor housing 212 and the turbine housing 214 are generally produced by plastic working a plate material or a tube material.

  FIG. 4 shows a schematic cross-sectional view of the compressor housing 212 of the second embodiment cut along a plane including the axis L. FIG. 5 shows a schematic exploded perspective view of the compressor housing 212 of the second embodiment. FIG. 6 is a schematic cross-sectional view of the compressor housing 212 taken along line BB of FIG. As in the first embodiment, in the second embodiment, the compressor housing 212 and the turbine housing 214 have substantially the same configuration. Therefore, only the compressor housing 212 will be described below. Description of 214 is omitted.

  The compressor housing 212 of the second embodiment has a housing body 218 adjacent to the radially outer side of the compressor impeller 34 and a shroud member 220 adjacent to the compressor impeller 34 in the axial direction, and the housing body 218 and the shroud member. 220 is coupled.

  The housing body 218 has the same axis L as that of the compressor impeller 34 to be accommodated, and has a rotationally symmetrical shape with respect to the axis L in general. The intake annular passage 50, which is a space defined by the housing body 218 and the shroud member 220, has a common shaft center L with the compressor impeller 34, and the shaft center L is related to the shaft center L. It has a rotationally symmetric shape. As in the first embodiment, the radial annular cross-section shape of the intake annular passage 50 defined in the housing body 218 is generally rectangular. An intake lead-out passage 48 is formed over the entire circumference on the radially inner side of the intake annular passage 50.

  Unlike the housing body 54 of the first embodiment, the housing body 218 of the second embodiment is an assembly in which two members, a ring-shaped member 222 and an extending member 224, are coupled.

  The ring-shaped member 222 of the housing body 218 according to the second embodiment is halved on a surface (see FIG. 4) including a line BB orthogonal to the axis L, and the first housing member 226, It is comprised by the two members with the two housing members 228. Both the first housing member 226 and the second housing member 228 are produced by press-molding a plate material. And the joining female part 226a of the 1st housing member 226 and the joining male part 228a of the 2nd housing member 228 are mutually fitted, and are united by welding (refer FIG. 4). The first housing member 226 and the second housing member 228 are integrated, so that the peripheral wall 230 of the ring-shaped member 222 has a hole for inserting the extension member 224 as shown in FIG. 232 is formed.

  The extending member 224 coupled to the ring-shaped member 222 includes an outlet-side flange portion 233 at one end portion farthest from the ring-shaped member 222, and the other portion is generally cylindrical. However, the insertion part 234 of the extending member 224 on the side inserted into the hole 232 of the ring-shaped member 222 has an oblique cross section and forms a sharp tip 234a. As shown in FIG. 6, the insertion portion 234 of the extending member 224 is inserted into the hole 232 of the ring-shaped member 222 and joined together by welding. At this time, a portion of the insertion portion 234 that is inserted into the ring-shaped member 222 that is not in contact with the outer wall portion of the ring-shaped member 222 forms a free end portion 234 b in the ring-shaped member 222. Since the free end portion 234b protrudes in the tangential direction of the compressor impeller 34 at the outer end of the intake annular passage 50 of the compressor housing 212 in the tangential direction, it acts to guide air in the tangential direction. The base portion of the extending member 224, that is, the coupling portion 236 with the ring-shaped member 222 may have a rectangular cross section. In this case, the free end portion 234b is the entire outer peripheral portion of the intake annular passage 50. It will act as a partitioning part that shields. The partition portion in this case, that is, the free end portion 234b may shield the entire cross section of the intake annular passage 50.

  The shroud member 220 includes an inlet flange portion 238, a joint flange portion 240 that forms a joint portion with the housing body 218, and a cylindrical portion 242 that is accommodated in the housing body 218. A radially outer side surface of the cylindrical portion 242 defines an intake annular passage 50 together with the housing body 218. Moreover, the cylindrical part 242 has the shape which followed the rotation path | route outline of the curved edge 34b called the shroud part of the blade | wing 34a of the compressor impeller 34 on the radial inner side. Such a shroud member 220 is integrally formed by plastic processing of a pipe material. Note that the shroud member 220 may be manufactured by casting.

  In addition, the assembly procedure of the compressor 12 of the second embodiment is the same as that of the first embodiment.

  As described above, in addition to the effects described in the first embodiment, the following effects are achieved by the turbocharger of the second embodiment having the above-described configuration.

  The ring-shaped member 222 of the housing body 218 constituting the intake annular passage 50 is divided into two members, a first housing member 226 and a second housing member 228, and both are manufactured separately and then coupled to each other. Therefore, the compressor 12 which is a turbocharger fluid device can be provided at low cost. Further, since the housing body 218 is made by plastic processing a plate material or a pipe material once or a small number of times, and is manufactured by a small number of times of joining, it is possible to provide the compressor 12 as a turbocharger fluid device at low cost. These effects are also achieved by the turbine 16 having the turbine housing 214. Further, by using this, an inexpensive turbocharger 210 is provided.

  As mentioned above, although this invention was demonstrated based on said 1st and 2nd embodiment, this invention is not restrict | limited to them.

  For example, both the compressor housing and the turbine housing are divided into a housing body and a shroud member, but may be further divided. And the some member produced by these division | segmentation can be joined using arbitrary joining techniques, such as caulking and riveting, besides welding and bolting. Moreover, the radial cross-sectional shape of the exhaust annular passage and the intake annular passage formed in various housing bodies does not need to be rectangular, and may be any other shape. For example, the radial cross-sectional shape of the space in the housing includes various shapes such as a circle, an ellipse, and a triangle. Furthermore, as long as the space in the housing, particularly the intake annular passage and the exhaust annular passage, are annular, the shaft centers of the compressor impeller and the turbine wheel may not be made common, and the shaft centers may be misaligned. Alternatively, the space in the housing such as the intake annular passage and the exhaust annular passage is not limited to being strictly rotationally symmetric with respect to the axis of the wheel, and may be, for example, substantially rotationally symmetric. Further, the intake annular passage and the exhaust annular passage are formed only by the housing main body as in the first embodiment or by the housing main body and the shroud member as in the second embodiment. A section may also be formed using a portion such as the flange portion of the center housing 22 such as the portion 76.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of 1st embodiment of the turbocharger using the fluid apparatus for turbochargers concerning this invention, (a) is sectional drawing of a turbocharger, (b) is the compressor of the turbocharger of (a). It is a side view of a compressor housing. It is sectional drawing along the AA line of Fig.1 (a) of the compressor housing of FIG. FIG. 3 is an exploded perspective view of the compressor housing of FIGS. 1 and 2. It is sectional drawing of the compressor housing of 2nd embodiment. It is a disassembled perspective view of the compressor housing of FIG. FIG. 6 is a cross-sectional view of the compressor housing of FIGS. 4 and 5 along the line BB of FIG. 4.

Explanation of symbols

10 turbocharger 12 compressor 14 compressor housing 16 turbine 20 turbo rotor 22 center housing 24 turbine housing 26 turbine chamber 28 compressor chamber 30 rotor shaft 32 turbine wheel 34 compressor impeller 40 exhaust annular passage 50 intake annular passage 54 housing body 56 shroud member 58 ring -Shaped part 60 extension part

Claims (6)

A turbocharger fluid device comprising: a wheel that acts on a fluid; and a housing that surrounds an outer periphery of the wheel and forms a flow path of the fluid,
The turbocharger fluid device is characterized in that the space in the housing has a common shaft center with the wheel and is rotationally symmetric with respect to the shaft center.   2. The turbocharger fluid device according to claim 1, wherein a radial cross-sectional shape of the space in the housing is rectangular. The housing has a housing body adjacent to the outer side in the radial direction of the wheel, and a shroud member adjacent to the wheel in the axial direction,
3. The turbocharger fluid device according to claim 1, wherein the housing body and the shroud member are combined. 4.   The turbocharger fluid device according to claim 3, wherein at least one of the housing body and the shroud member is manufactured by plastic working.   The turbocharger fluid device according to any one of claims 1 to 4, wherein the space in the housing has a partition portion for directing the fluid in a tangential direction of an outer end portion of the flow path of the housing. A turbocharger comprising the turbocharger fluid device according to claim 1 on each of a turbine side and a compressor side.

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