JP2013036440A - Compressor housing, exhaust turbine supercharger, and method for manufacturing compressor housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a constitution of a fixed body to which a seal member is fixed, and to facilitate a step of fixing the seal member.SOLUTION: A compressor housing 10 surrounds an impeller. The compressor housing 10 also includes the seal member 50 which is cylindrical and formed of a resin material having free-cutting for the impeller. An outer periphery of the impeller is covered with an inner peripheral surface 53 of the seal member 50. The compressor housing 10 includes a shroud member 30 which is separated from a housing body 20 and on which an outer peripheral surface of the seal member 50 is fixedly installed.

Description

  The present invention relates to a compressor housing that surrounds an impeller of a centrifugal supercharger, an exhaust turbine supercharger including the compressor housing, and a method for manufacturing the compressor housing.

Conventionally, examples of this type of compressor wheel and exhaust turbine supercharger include a compressor housing and an exhaust turbine supercharger described in Patent Document 1.
The compressor housing described in Patent Document 1 includes a seal member that has a substantially cylindrical shape and whose outer periphery covers the outer periphery of the impeller. This seal member is made of a material having free-cutting properties with respect to the impeller, for example, a resin material, and is called a so-called abradable seal. Incidentally, in Patent Document 1, the seal member is formed by performing injection molding on the housing body of the compressor housing.

Japanese Patent Laid-Open No. 2004-299381

  However, when the sealing member is directly molded on the housing body of the compressor housing, the entire housing body needs to be placed in the injection molding apparatus. Therefore, the problem that the physique of an injection molding apparatus becomes large and the problem that the manufacturing process becomes complicated arise.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a compressor housing capable of fixing the seal member in a simple manner by reducing the physique of the fixed body to which the seal member is fixed, An object is to provide an exhaust turbine supercharger and a method of manufacturing a compressor housing.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
(1) The invention according to claim 1 is a compressor housing that surrounds the impeller, and includes a seal member that is formed of a material that has a cylindrical shape and is free-cutting with respect to the impeller. The gist of the compressor housing in which the outer periphery of the impeller is covered by the inner peripheral surface is provided with a shroud member that is separate from the housing main body of the compressor housing and to which the outer peripheral surface of the seal member is fixed.

  According to this configuration, unlike the configuration in which the portion to which the seal member is fixed is formed integrally with the housing body, the subassembly can be assembled to the housing body after the seal member is fixed to the shroud member. . That is, it is not necessary to handle the housing body when fixing the seal member. Therefore, the physique of the fixed body to which the seal member is fixed can be reduced, and the seal member can be fixed in a simple manner.

  (2) The invention according to claim 2 is the compressor housing according to claim 1, wherein the shroud member has a tubular shape as a whole and is divided into a plurality of parts, and the seal member is divided into a plurality of parts. The gist is that it is sandwiched from the outer peripheral side by the shroud member.

  According to this configuration, the seal member can be easily fixed to the inner peripheral surface of the shroud member by sandwiching the seal member from the outer peripheral side with the shroud member that is formed into a tubular shape as a whole and divided into a plurality of parts.

(3) The gist of the invention described in claim 3 is that, in the compressor housing according to claim 2, the shroud member is divided into two parts.
According to this configuration, the seal member can be easily fixed to the inner peripheral surface of the shroud member by sandwiching the seal member from the outer peripheral side by the pair of split shroud members. Further, since the shroud member is divided to the minimum necessary for sandwiching the seal member, it is possible to suitably suppress the configuration of the shroud member from becoming complicated.

  (4) The gist of the invention described in claim 4 is that, in the compressor housing according to claim 1, the seal member is formed directly on the inner peripheral surface of the shroud member.

  According to this configuration, the housing body is not required when the seal member is directly formed on the inner peripheral surface of the shroud member. For this reason, the physique of the to-be-molded body in which the sealing member is directly molded can be reduced. Therefore, the physique of the apparatus which directly molds the seal member can be reduced.

(5) The fifth aspect of the present invention is the compressor housing according to the fourth aspect, wherein the sealing member is formed by compression molding.
According to this configuration, since the shroud member is a part of the molding die for compression molding the seal member, the size of the molding die can be reduced, and the size of the compression molding apparatus can be reduced. Further, since the sealing member is formed by compression molding, the shroud member is not thermally strained.

(6) A sixth aspect of the invention is the compressor housing according to the fourth aspect, wherein the sealing member is formed by injection molding.
According to this configuration, the housing body is not required when the seal member is injection molded on the inner peripheral surface of the shroud member. For this reason, the physique of the to-be-molded body in which the seal member is injection-molded can be reduced. Therefore, the physique of the injection molding apparatus can be reduced.

  (7) The invention according to claim 7 is the compressor housing according to any one of claims 1 to 6, wherein a convex portion or a concave portion is formed on an inner peripheral surface of the shroud member, and the seal The gist is that the outer peripheral surface of the member is formed with a concave portion or a convex portion that fits into the convex portion or the concave portion.

  According to this configuration, the projecting portion or the recessed portion formed on the inner peripheral surface of the shroud member and the recessed portion or the projecting portion formed on the outer peripheral surface of the seal member are fitted to each other, so that the seal member comes out of the shroud member. This can be suitably suppressed.

  Further, for example, in the configuration in which the cylindrical seal member is press-fitted into the shroud member along the axial direction thereof, the press-fitting itself becomes difficult due to such convex portions (concave portions) and concave portions (convex portions). However, according to invention of Claim 2 and Claim 3, the shroud member is divided | segmented into plurality, and a seal member is fixed by pinching | interposing a seal member from the outer peripheral side with the shroud member divided | segmented into plurality. . For this reason, the presence of the convex portion (concave portion) and the concave portion (convex portion) does not cause a problem when the seal member is fixed to the shroud member.

  Moreover, according to invention of Claim 4-Claim 6, a sealing member is directly shape | molded on the internal peripheral surface of a shroud member. For this reason, the presence of the convex portion (concave portion) and the concave portion (convex portion) does not cause a problem when the seal member is fixed to the shroud member.

(8) The gist of the invention described in claim 8 is an exhaust turbine supercharger including the compressor housing according to any one of claims 1 to 7.
According to this configuration, it is possible to achieve the operational effects according to the operational effects of the invention described in any one of claims 1 to 7.

  (9) The invention according to claim 9 is a compressor housing that surrounds the impeller, and includes a seal member that is formed of a material that has a cylindrical shape and is free-cutting with respect to the impeller. In the method for manufacturing a compressor housing in which the outer periphery of the impeller is covered by the inner peripheral surface, a step of forming a shroud member that is formed as a whole and divided into two parts separately from the housing body of the compressor housing, and the seal The gist of the invention is to include a step of forming a member, and a step of assembling a partial assembly in which the seal member is sandwiched from the outer peripheral side by a pair of the shroud members to the housing body.

  According to this configuration, unlike the configuration in which the portion to which the seal member is fixed is formed integrally with the housing body, the subassembly can be assembled to the housing body after the seal member is fixed to the shroud member. . That is, it is not necessary to handle the housing body when fixing the seal member. Therefore, the physique of the fixed body to which the seal member is fixed can be reduced, and the seal member can be fixed in a simple manner. In addition, the seal member can be easily fixed while suitably suppressing the configuration of the shroud member from becoming complicated.

  (10) The invention according to claim 10 is a compressor housing that surrounds the impeller, and includes a seal member that is formed of a material having a cylindrical shape and free-cutting property with respect to the impeller. In a method for manufacturing a compressor housing in which an outer periphery of an impeller is covered by an inner peripheral surface, a step of forming a shroud member to which the seal member is fixed separately from a housing body of the compressor housing, and an inner peripheral surface of the shroud member The gist thereof includes a step of directly forming the seal member on the upper surface and a step of assembling a subassembly in which the seal member is formed on the shroud member to the housing body.

  According to this configuration, the housing body is not required when the seal member is directly formed on the inner peripheral surface of the shroud member. For this reason, the physique of the to-be-molded body in which the sealing member is directly molded can be reduced. Therefore, the physique of the apparatus which directly molds the seal member can be reduced.

The sectional view showing the section structure of the compressor which constitutes the exhaust turbine supercharger concerning a 1st embodiment of the present invention. About the compressor housing in the embodiment, (a) A partial cross-sectional view partially showing a cross-sectional structure of the compressor housing, (b) a plan view showing a planar structure viewed from the A direction of (a). It is sectional drawing which shows the cross-section of the compression molding apparatus for shape | molding the sealing member which concerns on 2nd Embodiment of this invention, Comprising: (a) Cross-sectional view which shows the cross-section before compression, (b) Cross section after compression Sectional drawing which shows a structure.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 shows a cross-sectional structure of a compressor 2 constituting an exhaust turbine supercharger (hereinafter abbreviated as a supercharger 1) in the present embodiment.
Hereinafter, in the axial direction C of the impeller 3, the right side in FIG. 1 is referred to as a proximal end side, and the left side in FIG. 1 is referred to as a distal end side.

  As shown in FIG. 1, the compressor 2 of the supercharger 1 is a centrifugal compressor, and includes an impeller 3 that is connected to a turbine (not shown) and a compressor housing 10 that surrounds the impeller 3.

  The compressor housing 10 includes a housing main body 20 that is a housing of the compressor 2, a shroud member 30 and a rear member 40 that are provided inside the housing main body 20, and a seal member 50 that is press-fitted into the inner peripheral surface of the shroud member 30. ing. That is, the shroud member 30 is separated from the housing body 20.

  A scroll portion 21 having an inner wall that defines a scroll space S that is substantially semicircular in cross section and spiral as a whole is formed inside the housing body 20. Further, a cylindrical portion 22 extending from the front end of the scroll portion 21 toward the front end side is formed.

  The shroud member 30 has a substantially cylindrical shape. The scroll portion 30 has an arcuate cross section on the outer peripheral surface and is positioned on the base end side with respect to the scroll portion 21 of the housing body 20 and divides the scroll space S together therewith. 31 is formed.

  A groove portion 33 is formed over the entire periphery of the inner peripheral surface 32 of the shroud member 30 at a portion facing the outer periphery of the impeller 3. The groove 33 is open to the base end side. Further, the shroud member 30 is formed with a cylindrical extending portion 36 extending toward the distal end side at the distal end side of the groove portion 33, and an outer peripheral surface of the extending portion 36 is formed on the cylindrical portion 22 of the housing body 20. It is in pressure contact with the inner peripheral surface.

  A sealing member 50 having a substantially cylindrical shape is press-fitted into the groove 33. The groove 33 is formed of a resin material having free-cutting properties with respect to the impeller 3. That is, the inner peripheral surface of the seal member 50 functions as a so-called abradable seal. The axial direction of the seal member 50 is the same as the axial direction C of the impeller 3.

  The rear member 40 has a substantially cylindrical shape, and an inner peripheral surface thereof has an arcuate cross section and is positioned on the outer peripheral side of the scroll portion 31 of the shroud member 30 and the scroll portion 31 of the housing body 20. At the same time, a scroll portion 41 that partitions the scroll space S is formed.

The housing body 20, the shroud member 30, and the rear member 40 are all formed by casting.
Next, referring to FIG. 2, the shape of the shroud member 30 and the manner in which the seal member 50 is fixed to the shroud member 30 will be described in detail.

  FIG. 2A partially shows a cross-sectional structure of the compressor housing 10. FIG. 2B shows a planar structure viewed from the direction of arrow A in FIG. 2A and 2A show a cross-sectional structure before the inner peripheral surface 53 of the seal member 50 is cut.

  As shown in FIGS. 2A and 2B, the shroud member 30 has a substantially cylindrical shape as a whole and has a split structure divided into two. That is, the shroud member 30 is divided into a first shroud member 30a and a second shroud member 30b by a plane H along the central axis C.

  As shown in FIG. 2 (a), the groove portion 33a of the first shroud member 30a is formed with a convex portion 35a protruding on the inner peripheral side (upper side in FIG. 2 (a)) over the entire circumferential direction (half circumference). . Moreover, the recessed part 55 fitted to the convex part 35a of the 1st shroud member 30a is formed in the outer peripheral surface 51 of the sealing member 50 over the whole circumferential direction (entire periphery). Further, the seal member 50 is sandwiched from the outer peripheral side by a pair of split shroud members 30a and 30b, and the outer peripheral surface 51 of the seal member 50 is pressed against the groove portion 33a of the first shroud member 30a. Further, the front end surface of the seal member 50 is in pressure contact with the stepped portion 34a of the groove portion 33a. The shape of the second shroud member 30b is basically the same as the shape of the first shroud member 30a. Further, the manner of fixing the seal member 50 to the second shroud member 30b is basically the same as the manner of fixing the seal member 50 to the first shroud member 30a. Therefore, the description is omitted here.

Next, a method for manufacturing the compressor housing 10 will be described.
When manufacturing the compressor housing 10, first, the seal member 50 alone is formed by injection molding. The housing body 20, the pair of shroud members 30a and 30b, and the rear member 40 are each formed by casting. Then, the seal member 50 is sandwiched from the outer peripheral side by the pair of shroud members 30a and 30b to form a subassembly SA. At this time, the convex portion 35 a formed in the groove portion 33 a of the shroud member 30 is fitted into the concave portion 55 formed in the outer peripheral surface 51 of the seal member 50.

Next, the partial assembly SA is assembled to the housing body 20 by press-fitting the extending portion 36 of the shroud member 30 from the proximal end side to the cylindrical portion 22 of the housing body 20.
Next, the rear member 40 is assembled to the housing main body 20 by press-fitting the rear member 40 into the housing main body 20 from the base end side. Thereby, the assembly of the compressor housing 10 is completed.

Next, the operation of this embodiment will be described.
In such a supercharger 1, when a turbine wheel (not shown) is rotationally driven by the energy of exhaust gas discharged from the internal combustion engine, the impeller 3 that is axially connected to the turbine wheel rotates. Thereby, supercharging is performed by compressing the intake air when it passes through the compressor 2.

  Further, the shroud member 30 to which the seal member 50 is fixed is formed separately from the housing body 20 constituting the compressor housing 10. Further, the shroud member 30 has a cylindrical shape as a whole and is divided into two. The seal member 50 is sandwiched from the outer peripheral side by a pair of shroud members 30a and 30b. For this reason, unlike the structure in which the portion where the seal member is fixed is formed integrally with the housing body, the subassembly SA can be assembled to the housing body 20 after the seal member 50 is fixed to the shroud member 30. it can. That is, it is not necessary to handle the housing body 20 when fixing the seal member 50.

According to this embodiment described above, the following effects can be obtained.
(1) The compressor housing 10 includes a shroud member 30 that is separate from the housing body 20 and to which the outer peripheral surface of the seal member 50 is fixed. According to such a configuration, the size of the fixed body (the shroud member 30) to which the seal member 50 is fixed can be reduced, and the seal member 50 can be fixed in a simple manner.

  (2) The shroud member 30 has a tubular shape as a whole and is divided into two, and the seal member 50 is sandwiched from the outer peripheral side by a pair of divided shroud members 30a and 30b. According to such a configuration, the seal member 50 can be easily fixed to the inner peripheral surface of the shroud member 30. Moreover, since the shroud member 30 is divided into the minimum necessary for sandwiching the seal member 50, it is possible to suitably suppress the configuration of the shroud member 30 from becoming complicated.

  (3) A convex portion 35 a is formed in the groove portion 33 a of the shroud member 30, and a concave portion 55 that fits into the convex portion 35 a is formed on the outer peripheral surface 51 of the seal member 50. According to such a configuration, the projecting portion 35 a formed in the groove portion 33 a of the shroud member 30 and the recess 55 formed in the outer peripheral surface 51 of the seal member 50 are fitted to each other, whereby the seal member 50 is removed from the shroud member 30. It is possible to suitably suppress the escape.

  Further, for example, in the configuration in which the cylindrical seal member is press-fitted into the shroud member along the axial direction thereof, the press-fitting itself becomes difficult due to such convex portions and concave portions. However, according to the configuration of the present embodiment, the shroud member 30 is divided into two parts, and the seal member 50 is sandwiched between the shroud members 30a and 30b divided into two from the outer peripheral side. Is fixed. For this reason, the presence of the convex portion 35 a and the concave portion 55 does not cause a problem when the seal member 50 is fixed to the shroud member 30.

  (4) The method of manufacturing the compressor housing 10 includes a step of forming the shroud members 30a and 30b which are formed into a cylindrical shape and divided into two as a whole separately from the housing body 20 of the compressor housing 10, and a cylindrical shape. And a step of forming a sealing member 50 formed of a resin material having free-cutting properties with respect to the impeller 3. In addition, the method for manufacturing the compressor housing 10 includes a step of assembling the subassembly SA having the seal member 50 sandwiched between the pair of shroud members 30 a and 30 b from the outer peripheral side to the housing body 20. According to such a structure, there can exist said effect (1), (2).

[Second Embodiment]
The second embodiment of the present invention will be described in detail below with reference to FIG.
Note that the present embodiment is different from the first embodiment in that the seal member 150 is directly molded on the groove 133 of the shroud member 130 by compression molding. In addition, since the configuration other than these is basically the same as that of the first embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In FIG. 3, the cross-section of the compression molding apparatus 100 for forming the sealing member 150 of this embodiment is shown. 3A is a sectional view showing a sectional structure before compression, and FIG. 3B is a sectional view showing a sectional structure after compression.

  As shown in FIGS. 3A and 3B, a substantially cylindrical inner peripheral mold 102 is inserted into the inner space of the substantially cylindrical support base 101 from below. Here, the lower end portion of the inner peripheral mold 102 is larger than the inner diameter of the support base 101. Further, the upper end portion of the inner peripheral mold 102 projects upward from the upper end portion of the support base 101.

  A substantially cylindrical shroud member 130 is placed on the upper surface of the support base 101. The shroud member 130 has a configuration corresponding to the configuration of the first embodiment, that is, a scroll portion 131, an inner peripheral surface 132, a groove portion 133, a stepped portion 134, a convex portion 135, and an extending portion 136. Here, the inner diameter of the extending portion 136 of the shroud member 130 is slightly larger than the outer diameter of the inner peripheral mold 102.

  A cylindrical inner guide member 103 is placed coaxially with the shroud member 130 on the upper surface (end surface on the base end side) of the shroud member 130. The inner guide member 103 has the same inner diameter as the groove 133 of the shroud member 130.

The support base 101, the shroud member 130, and the inner guide member 103 are guided by an outer guide member 105 having a cylindrical shape over the entire circumference.
The compression molding apparatus 100 includes an upper mold 104 that has a substantially cylindrical shape. The lower end of the upper mold has an inner diameter slightly larger than the outer diameter of the inner peripheral mold 102, and the outer diameter is slightly smaller than the inner diameter of the inner guide member 103. Moreover, the center part of the upper mold has a larger diameter than the lower end part, and the upper part of the upper mold has a larger diameter than the central part. Note that the outer diameter of the central portion is slightly smaller than the inner diameter of the outer guide member 105.

Next, a procedure for compression molding of the seal member 150 using the compression molding apparatus 100 will be described.
As shown in FIG. 3A, first, a granular shape is formed from an upper opening with respect to a substantially cylindrical space defined by the groove portion 133, the step portion 134, the inner guide member 103, and the inner peripheral mold 102 of the shroud member 130. Introducing the resin material.

  Next, the lower end portion of the upper mold 104 is inserted into the space between the inner peripheral surface of the inner guide member 103 and the outer peripheral surface of the inner peripheral mold 102 from above. Then, a predetermined pressure is applied to the resin material already introduced by the upper mold 104 to compress the resin material. Thereby, the cylindrical seal member 150 is compression-molded on the groove 133 of the shroud member 130.

  Thus, the assembly of the compressor housing 10 is completed by press-fitting the subassembly SA and the rear member 40 in which the seal member 150 is formed on the shroud member 130 into the housing body 20 in the same manner as in the first embodiment.

According to the present embodiment described above, the following functions and effects can be newly obtained in addition to the functions and effects (1) of the first embodiment.
(5) The seal member 150 is directly molded on the groove 133 of the shroud member 130 by compression molding. According to such a configuration, the housing body is not required when the seal member 150 is directly formed on the inner peripheral surface of the shroud member 130. In addition, since the shroud member 130 is a part of a mold for compression-molding the seal member 150, the size of the mold can be reduced, and the size of the compression molding apparatus 100 can be reduced. Further, since the seal member 150 is formed by compression molding, the shroud member 130 is not thermally strained.

  (6) A convex portion 135 is formed in the groove portion 133 of the shroud member 130, and a concave portion 155 that fits the convex portion 135 is formed on the outer peripheral surface 151 of the seal member 150. According to such a configuration, the convex portion 135 formed in the groove portion 133 of the shroud member 130 and the concave portion 155 formed in the outer peripheral surface 151 of the seal member 150 are fitted to each other, whereby the seal member 150 is removed from the shroud member 130. It is possible to suitably suppress the escape.

  Further, according to the configuration of the present embodiment, the seal member 150 is directly formed on the groove 133 of the shroud member 130. For this reason, the presence of the convex portion 135 and the concave portion 155 does not cause a problem when the seal member 150 is fixed to the shroud member 130.

  (7) In the method of manufacturing the compressor housing, the shroud member 130 to which the seal member 150 is fixed is formed separately from the housing body 20 constituting the compressor housing 10, and the seal is formed on the groove 133 of the shroud member 130. A step of directly forming the member 150 is provided. In addition, the method for manufacturing the compressor housing includes a step of assembling the subassembly SA having the seal member 150 formed on the shroud member 130 to the housing body 20. According to such a structure, the said effect (5) can be show | played.

  In addition, the compressor housing, the exhaust turbine supercharger, and the method for manufacturing the compressor housing according to the present invention are not limited to the configurations exemplified in the above-described embodiment. Can also be implemented.

  In each of the above embodiments, the seal member 50 formed of a resin material is exemplified, but the present invention is not limited to this. The seal member may be formed of a material that is more fragile than the impeller, for example, a metal material, as long as the material has free-cutting properties with respect to the impeller 3.

  In the above embodiment, the housing main body 20 and the rear member 40 are formed separately, but instead, the housing main body and the rear member may be integrally formed, and the whole may be used as the housing main body. it can.

  In each of the above embodiments, the outer peripheral surface 51 of the seal member 50 is formed along the axial direction C. That is, the groove 33 of the shroud member 30 is formed along the axial direction C. Instead, the outer peripheral surface of the seal member is inclined so that the proximal end is closer to the central axis of the seal member, and the groove portion of the shroud member is closer to the central axis closer to the proximal end. It can be set as the inclined surface which inclines so. In this case, it is possible to further suppress the sealing member from coming out from the shroud member to the proximal end side.

  In each of the above embodiments, the case where one protrusion 35 a is formed in the groove 33 a of the shroud member 30 and one recess 55 is formed on the outer peripheral surface 51 of the seal member 50 is illustrated. However, the present invention is not limited to this, and a plurality of convex portions are formed in the axial direction C in the groove portion of the shroud member, and a plurality of convex portions in the axial direction C are formed on the outer peripheral surface of the seal member so as to correspond thereto. A recess may be formed.

  In each of the above embodiments, the case where the convex portion 35 a is formed in the groove portion 33 a of the shroud member 30 and the concave portion 55 that fits the convex portion 35 a is formed on the outer peripheral surface 51 of the seal member 50 is illustrated. Instead, a recess may be formed in the groove of the shroud member, and a protrusion that fits into the recess may be formed on the outer peripheral surface of the seal member. In this case, it can suppress suitably that a sealing member slips out from a shroud member because the recessed part of a shroud member and the convex part of a sealing member fit mutually.

  As in each of the above-described embodiments and modifications thereof, a convex portion or a concave portion is formed in the groove portion of the shroud member, and a concave portion or a convex portion that fits into the convex portion or the concave portion is formed on the outer peripheral surface of the seal member. It is desirable for suitably suppressing the seal member from coming out of the shroud member. However, as described above, for example, the outer peripheral surface of the seal member is an inclined surface that is inclined so as to be closer to the central axis of the seal member toward the base end side. In the case where the sealing member can be suitably prevented from coming out by being inclined so as to be close to the central axis, such convex portions and concave portions can be omitted.

  In the second embodiment, the seal member 150 is formed by compression molding, but the present invention is not limited to this. Any sealing member may be used as long as the sealing member is directly formed on the inner peripheral surface of the shroud member, and the sealing member can also be formed by injection molding. In this case, the housing body is not required when the seal member is injection molded on the inner peripheral surface of the shroud member. For this reason, the physique of the to-be-molded body in which the sealing member is injection-molded can be reduced, and the physique of the injection molding apparatus can be reduced.

  In the first embodiment, the shroud member 30 is illustrated as being divided into two. However, instead of this, the shroud member may be divided into three or more.

  DESCRIPTION OF SYMBOLS 1 ... Supercharger, 2 ... Compressor, 3 ... Impeller, 10 ... Compressor housing, 20 ... Housing main body, 21 ... Scroll part, 22 ... Cylindrical part, 30, 130 ... Shroud member, 30a ... 1st shroud member, 30b ... Second shroud member 31, 31a, 131 ... scroll part, 32, 32a, 132 ... inner peripheral surface, 33, 33a, 133 ... groove part, 34a, 134 ... step part, 35a, 135 ... convex part, 36, 36a, DESCRIPTION OF SYMBOLS 136 ... Extension part, 40 ... Rear member, 41 ... Scroll part, 50, 150 ... Seal member, 51, 151 ... Outer peripheral surface, 53, 153 ... Inner peripheral surface, 55, 155 ... Recessed part, 100 ... Compression molding apparatus, DESCRIPTION OF SYMBOLS 101 ... Support stand, 102 ... Inner periphery type | mold, 103 ... Inner guide member, 104 ... Upper mold | type, 105 ... Outer guide member, SA ... Partial assembly.

Claims (10)

A compressor housing that surrounds the impeller, the compressor housing having a cylindrical shape and a seal member that is formed of a material that is free-cutting with respect to the impeller, and the outer periphery of the impeller is covered by the inner peripheral surface of the seal member In
A compressor housing comprising a shroud member that is separate from the housing body of the compressor housing and to which the outer peripheral surface of the seal member is fixed. The compressor housing according to claim 1,
The shroud member has a tubular shape as a whole and is divided into a plurality of parts,
The compressor housing, wherein the seal member is sandwiched from the outer peripheral side by the shroud member divided into a plurality of parts. The compressor housing according to claim 2,
The compressor housing, wherein the shroud member is divided into two. The compressor housing according to claim 1,
The compressor housing, wherein the seal member is formed directly on the inner peripheral surface of the shroud member. The compressor housing according to claim 4,
The compressor housing, wherein the seal member is formed by compression molding. The compressor housing according to claim 4,
The compressor housing, wherein the seal member is formed by injection molding. In the compressor housing according to any one of claims 1 to 6,
A convex portion or a concave portion is formed on the inner peripheral surface of the shroud member,
A compressor housing characterized in that a concave portion or a convex portion that fits into the convex portion or the concave portion is formed on the outer peripheral surface of the seal member.   An exhaust turbine supercharger comprising the compressor housing according to any one of claims 1 to 7. A compressor housing that surrounds the impeller, the compressor housing having a cylindrical shape and a seal member that is formed of a material that is free-cutting with respect to the impeller, and the outer periphery of the impeller is covered by the inner peripheral surface of the seal member In the manufacturing method of
Forming a shroud member that has a tubular shape as a whole and is divided into two parts separately from the housing body of the compressor housing;
Forming the sealing member;
And a step of assembling a subassembly in which the seal member is sandwiched from the outer peripheral side by a pair of the shroud members to the housing body. A compressor housing that surrounds the impeller, the compressor housing having a cylindrical shape and a seal member that is formed of a material that is free-cutting with respect to the impeller, and the outer periphery of the impeller is covered by the inner peripheral surface of the seal member In the manufacturing method of
Forming a shroud member to which the seal member is fixed separately from the housing body of the compressor housing;
Directly molding the seal member on the inner peripheral surface of the shroud member;
And a step of assembling a subassembly in which the seal member is formed on the shroud member to the housing body.

Images