JP2018145942A - Assembly method for supercharger, compressor and supercharger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a sufficient compressor suction passage area to improve a supercharging rate or make a device compact, in an assembly method for supercharger, a compressor and a supercharger.SOLUTION: An assembly method for a supercharger comprises the steps of: supporting a compressor 13 in an immovable manner in an axis direction and a circumferential direction; supporting a turbine 12 in a movable manner in the axis direction and the circumferential direction, the turbine provided integrally with a rotational shaft 14; moving the turbine 12 to the compressor 13 side to contact a screw part 37, provided at a tip part of the rotational shaft 14, with a screw hole 38 formed in the compressor 13; and moving and rotating the turbine 12 to the compressor 13 side in the circumferential direction to screw the screw part 37 into the screw hole 38.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a turbocharger assembling method, a compressor, and a turbocharger in which a compressor wheel is assembled to a turbine wheel.

  In the exhaust turbine supercharger, a compressor and a turbine are integrally connected by a rotating shaft, and the compressor and the turbine are rotatably accommodated in a housing. Then, exhaust gas is supplied into the housing, and the rotating shaft is driven to rotate by rotating the turbine, thereby rotating the compressor. The compressor sucks air from the outside, pressurizes it with an impeller to form compressed air, and supplies this compressed air to an internal combustion engine or the like.

  In such an exhaust turbine supercharger, a rotating shaft is integrally formed on the turbine wheel, a through hole of the compressor wheel is formed, and the rotating shaft of the turbine wheel is inserted into the through hole of the compressor wheel to rotate. By screwing a nut to the end of the shaft, the compressor wheel and the turbine wheel are fastened together. However, with such a turbocharger configuration, the compressor wheel is formed with a through hole, so that centrifugal stress is concentrated in the through hole during rotation, so that sufficient strength cannot be ensured. There is a problem.

  As what solves such a problem, there exists a thing described in the following patent document 1, for example. In the turbocharger described in Patent Document 1, a rotating shaft is integrally formed on a turbine impeller, a blind screw hole is formed on a compressor wheel, and a screw portion formed on the rotating shaft of the turbine impeller is blind screwed. It is fastened to the compressor wheel and the turbine wheel by being screwed into the hole. Therefore, the compressor wheel is not formed with a through hole, so that centrifugal stress is not concentrated on the through hole during rotation, and sufficient strength can be ensured.

JP 2009-209867 A

  In the supercharger described in Patent Document 1, a screw portion formed on a rotating shaft of a turbine impeller is screwed into a blind screw hole of a compressor wheel to fasten them together. At this time, in a state where the turbine impeller (screw part of the rotating shaft) is pressed with a jig so as not to rotate, the compressor impeller rotates through a jig attached to the tip of the compressor impeller, Both fastening torques are secured. However, in this configuration, since it is necessary to attach a jig to the tip of the compressor wheel, it is necessary to set a large outer diameter dimension at the jig mounting position at the tip of the compressor wheel. Then, there is a problem that the passage area of the suction port of the compressor in the housing is reduced and the supercharging ratio is reduced.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and a turbocharger assembling method, a compressor, and a turbocharger that improve a supercharging rate or make a device compact by securing a sufficient compressor suction passage area. The purpose is to provide.

  In order to achieve the above-described object, a method of assembling a turbocharger according to the present invention includes a step of supporting a compressor so as not to be movable in an axial direction and a circumferential direction, and a turbine integrally provided with a rotating shaft in an axial direction A step of supporting the turbine so as to be movable, a step of moving the turbine to the compressor side, and a screw portion provided at a tip portion of the rotating shaft contacting a screw hole formed in the compressor, and the turbine And rotating to the compressor side in the circumferential direction to screw the threaded portion into the threaded hole.

  Therefore, while supporting the compressor, the turbine is rotated in the circumferential direction while moving to the compressor side, and the threaded portion is screwed into the screw hole. Therefore, it is necessary to mount a through-hole or a jig for rotating the compressor. Therefore, the outer diameter of the tip of the compressor can be reduced. As a result, it is possible to improve the supercharging rate by ensuring a large passage area of the compressor suction port where the front end of the compressor is arranged, or the outer diameter of the compressor suction port while maintaining the supercharging rate. The device can be made compact by reducing the diameter.

  In the turbocharger assembling method of the present invention, the outer peripheral portion of the compressor is supported by the locking member so as not to move in the axial direction and the circumferential direction with respect to the housing.

  Therefore, the compressor can be easily supported with a simple configuration by supporting the outer peripheral portion of the compressor so as not to move with respect to the housing by the locking member.

  In the turbocharger assembling method of the present invention, the rotating shaft is supported by the housing so as to be movable in the axial direction and the circumferential direction, and the turbine portion is rotated while moving to the compressor side to rotate the screw portion to the screw hole. It is characterized in that it is screwed onto.

  Therefore, by connecting the compressor and the turbine using the housing, it is possible to improve workability without using a separate jig for supporting the compressor and the turbine.

  In addition, the compressor of the present invention is characterized in that a fastening locking portion is provided on the outer peripheral portion so as not to move in the circumferential direction with respect to the housing.

  Therefore, by providing a fastening locking part on the outer peripheral part of the compressor, it is fastened when the screw part is screwed into the screw hole by rotating in the circumferential direction while moving the turbine to the compressor side while supporting the compressor. The compressor can be easily supported by the locking portion.

  In the compressor of the present invention, the fastening locking portion is a through-hole through which the locking jig passes.

  Therefore, the processing cost can be reduced by using the fastening engagement portion as a through hole.

  Moreover, the supercharger of this invention is equipped with the said compressor, a turbine, and the rotating shaft which connects the said compressor and turbine integrally, It is characterized by the above-mentioned.

  Therefore, the compressor and the turbine can be connected by rotating the turbine in the circumferential direction while moving the turbine toward the compressor while the compressor is supported, and screwing the screw portion into the screw hole. The turbocharger can be improved by ensuring a large passage area for the compressor inlet where the compressor is installed, or the compressor inlet can be reduced in diameter while maintaining the turbocharger, and the equipment can be made compact. Can be achieved.

  The supercharger assembling method according to the present invention includes a step of supporting a turbine in which a rotating shaft is integrally provided so as to be immovable in an axial direction and a circumferential direction, and a locking jig provided on an outer peripheral portion of a compressor. The screw hole formed in the compressor is screwed into the screw portion provided at the tip of the rotating shaft by rotating the compressor via the locking portion by a fastening jig. And a step of causing the step to occur.

  Therefore, in a state where the turbine is immovably supported, the compressor screw hole is screwed into the screw portion of the rotating shaft by rotating the compressor through the locking portion with a fastening jig, so that a through hole or rotation is provided in the compressor. Therefore, it is not necessary to mount a jig or the like for reducing the outer diameter of the tip of the compressor. As a result, it is possible to improve the supercharging rate by ensuring a large passage area of the compressor suction port where the front end of the compressor is arranged, or the outer diameter of the compressor suction port while maintaining the supercharging rate. The device can be made compact by reducing the diameter.

  The compressor of the present invention is characterized in that a fastening portion for fastening that a fastening jig is fastened to the outer peripheral portion is provided.

  Therefore, the compressor can be easily supported by the fastening jig being locked to the fastening locking portion in a state where the turbine is supported, and the compressor can be easily rotated in the circumferential direction while moving to the turbine side. The threaded portion can be screwed into the screw hole.

  In the compressor of the present invention, the fastening locking portion is a through hole or a notch.

  Therefore, the processing cost can be reduced by using the fastening locking portion as a through hole or a notch.

  Moreover, the supercharger of this invention is equipped with the said compressor, a turbine, and the rotating shaft which connects the said compressor and turbine integrally, It is characterized by the above-mentioned.

  Therefore, the compressor and the turbine are connected by screwing the screw hole of the compressor to the screw part of the rotating shaft by rotating the compressor through the locking part by the fastening jig while supporting the turbine so that it cannot move. It is possible to improve the supercharging rate by ensuring a large passage area of the compressor inlet where the tip of the compressor is arranged, or while maintaining the supercharging rate, the compressor inlet The apparatus can be made compact by reducing the outer diameter of the apparatus.

  The supercharger of the present invention is characterized in that a cover member is provided to cover the fastening locking portion from the compressor suction port side.

  Therefore, since the fastening latching portion is covered with the cover member, when the air is compressed by the compressor, the disturbance of the air flow by the fastening latching portion can be suppressed.

  The supercharger assembling method of the present invention includes a step of supporting a turbine integrally provided with a rotating shaft so as to be immovable in an axial direction and a circumferential direction, and a step of locking a fastening jig to a blade of a compressor. And rotating the compressor via the blade by the fastening jig, and screwing a screw hole formed in the compressor into a screw portion provided at a tip portion of the rotating shaft. It is a feature.

  Therefore, in a state where the turbine is immovably supported, the screw hole of the compressor is screwed into the screw portion of the rotating shaft by rotating the compressor through the blade with the fastening jig, and thus the through hole or the rotation of the compressor. It is not necessary to attach a jig or the like, and it is possible to reduce the outer diameter of the tip of the compressor. As a result, it is possible to improve the supercharging rate by ensuring a large passage area of the compressor suction port where the front end of the compressor is arranged, or the outer diameter of the compressor suction port while maintaining the supercharging rate. The device can be made compact by reducing the diameter.

  According to the turbocharger assembling method, the compressor, and the turbocharger of the present invention, it is possible to improve the supercharging rate by ensuring a sufficient compressor suction passage area or to make the apparatus compact. be able to.

FIG. 1 is an overall configuration diagram illustrating an exhaust turbine supercharger according to a first embodiment. FIG. 2 is a schematic diagram illustrating a supercharger assembling method according to the first embodiment. FIG. 3 is a front view illustrating a compressor in the exhaust turbine supercharger according to the second embodiment. FIG. 4 is a cross-sectional view illustrating the outer peripheral portion of the compressor impeller in the compressor. FIG. 5 is a front view illustrating a modification of the compressor of the second embodiment. FIG. 6 is a cross-sectional view illustrating the outer peripheral portion of the compressor impeller in the compressor. FIG. 7 is a cross-sectional view illustrating a main part of the exhaust turbine supercharger according to the second embodiment. FIG. 8 is a schematic diagram illustrating a supercharger assembling method according to the second embodiment. FIG. 9 is a schematic diagram illustrating a supercharger assembling method according to the third embodiment.

  Exemplary embodiments of a supercharger assembling method, a compressor, and a supercharger according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
FIG. 1 is an overall configuration diagram illustrating an exhaust turbine supercharger according to the first embodiment, and FIG. 2 is a schematic diagram illustrating an assembling method of the supercharger according to the first embodiment.

  As shown in FIG. 1, the exhaust turbine supercharger 11 is mainly composed of a turbine 12, a compressor 13, and a rotating shaft 14, which are accommodated in a housing 15.

  The housing 15 is hollow and has a turbine housing 15A that forms a first space S1 that houses the configuration of the turbine 12, a compressor housing 15B that forms a second space S2 that houses the configuration of the compressor 13, and a rotation And a bearing housing 15 </ b> C forming a third space S <b> 3 that accommodates the shaft 14. The third space S3 of the bearing housing 15C is located between the first space S1 of the turbine housing 15A and the second space S2 of the compressor housing 15B.

  The rotary shaft 14 is rotatably supported at its end on the turbine 12 side by a journal bearing 21 that is a turbine side bearing, and is rotatably supported at its end on the compressor 13 side by a journal bearing 22 that is a compressor side bearing. The thrust bearing 23 restricts movement in the axial direction in which the rotating shaft 14 extends. The rotating shaft 14 has a turbine disk 24 of the turbine 12 fixed to one end in the axial direction. The turbine disk 24 is accommodated in the first space S1 of the turbine housing 15A, and a plurality of turbine blades 25 having an axial flow type are provided on the outer peripheral portion at predetermined intervals in the circumferential direction. The rotary shaft 14 has a compressor impeller 26 of the compressor 13 fixed to the other end in the axial direction. The compressor impeller 26 is accommodated in the second space S2 of the compressor housing 15B, and a plurality of blades 27 are provided on the outer peripheral portion at predetermined intervals in the circumferential direction.

  The turbine housing 15 </ b> A is provided with an exhaust gas inlet passage 31 and an exhaust gas outlet passage 32 with respect to the turbine blades 25. The turbine housing 15 </ b> A is provided with a turbine nozzle 33 between the inlet passage 31 and the turbine blade 25, and the axial exhaust gas flow statically expanded by the turbine nozzle 33 is supplied to the plurality of turbine blades 25. By being guided, the turbine 12 can be driven and rotated. The compressor housing 15B is provided with a suction port 34 and a compressed air discharge port 35 with respect to the compressor impeller 26. In the compressor housing 15 </ b> B, a diffuser 36 is provided between the compressor impeller 26 and the compressed air discharge port 35. The air compressed by the compressor impeller 26 is exhausted through the diffuser 36.

  Therefore, in the exhaust turbine supercharger 11, the turbine 12 is driven by exhaust gas discharged from an engine (not shown), the rotation of the turbine 12 is transmitted to the rotating shaft 14, and the compressor 13 is driven. Compresses the combustion gas and supplies it to the engine. Therefore, the exhaust gas from the engine passes through the exhaust gas inlet passage 31 and is statically expanded by the turbine nozzle 33, and the exhaust gas flow in the axial direction is guided to the plurality of turbine blades 25. The turbine 12 is driven to rotate through the turbine disk 24 to which is fixed. The exhaust gas that has driven the plurality of turbine blades 25 is discharged to the outside from the outlet passage 32. On the other hand, when the rotating shaft 14 is rotated by the turbine 12, the integrated compressor impeller 26 is rotated and air is sucked through the suction port 34. The sucked air is pressurized by the compressor impeller 26 to become compressed air, and this compressed air passes through the diffuser 36 and is supplied to the engine from the compressed air discharge port 35.

  In the above-described exhaust turbine supercharger 11, as shown in FIG. 2, the turbine 12 is integrally provided with a plurality of turbine blades 25 on the outer peripheral portion of the turbine disk 24, and rotates to the axial center position of the turbine disk 24. The shaft 14 is integrally formed. On the other hand, the compressor 13 is configured by integrally providing a plurality of blades 27 on the outer peripheral portion of the compressor impeller 26. The rotary shaft 14 has a threaded portion 37 formed at the tip, while the compressor 13 has a threaded hole 38 formed at the axial center position of the compressor impeller 26. Therefore, the turbine 12 is integrally connected to the compressor 13 by the screw portion 37 of the rotating shaft 14 being screwed into the screw hole 38 of the compressor impeller 26.

  The supercharger assembling method of the first embodiment includes a step of supporting the compressor 13 so as not to be movable in the axial direction and the circumferential direction, and a movement of the turbine 12 integrally provided with the rotary shaft 14 in the axial direction and the circumferential direction. A step of supporting the turbine 12, a step of moving the turbine 12 toward the compressor 13, a step of bringing a screw portion 37 provided at the tip of the rotary shaft 14 into contact with a screw hole 38 formed in the compressor 13, and a step of And rotating in the circumferential direction while moving toward the 13th side, and screwing the screw portion 37 into the screw hole 38.

  Therefore, the compressor 13 of the first embodiment has a fastening-side locking portion (fastening locking) that locks the outer peripheral portion of the compressor impeller 26 so as not to move in the circumferential direction with respect to the bearing housing 15C (housing 15). Part), a through hole 41 is formed along the axial direction of the rotary shaft 14. The bearing housing 15 </ b> C is formed with a locking hole 42 along the axial direction of the rotary shaft 14 at a position facing the through hole 41 when the compressor 13 is assembled at a normal position of the housing 15. A locking pin 51 as a locking jig can be passed through the through hole 41, and the locking pin 51 can be inserted into the locking hole 42. In this case, it is desirable that the through holes 41 and the locking holes 42 are provided at a plurality of locations at predetermined intervals in the circumferential direction of the compressor 13. The fastening jig 52 is configured such that a locking portion 53 that can be connected to a connecting portion 43 formed at the tip of the turbine disk of the turbine 12 is provided at the tip. In the fastening jig 52, the locking portion 53 can be connected to the connecting portion 43.

  Therefore, when the exhaust turbine supercharger 11 is assembled, first, the journal bearings 21 and 22 and the sleeve of the thrust bearing 23 are mounted in the bearing housing 15C, and then the compressor 13 is installed in the axial direction on one side in the axial direction. Supports immovable in the circumferential direction. That is, with respect to the compressor 13 at a predetermined assembly position, the locking pin 51 is passed through the through hole 41 and the tip end portion of the locking pin 51 is fitted into the locking hole 42. And the front-end | tip part of the rotating shaft 14 integrally provided in the turbine 12 is inserted from the other side of an axial direction with respect to the support hole provided in the center part of the bearing housing 15C, and the rotating shaft 14 is journal bearings 21 and 22. And supported by the sleeve of the thrust bearing 23. Here, the turbine 12 and the rotating shaft 14 are supported by the bearing housing 15C so as to be movable in the axial direction and the circumferential direction.

  Thereafter, the turbine 12 and the rotary shaft 14 are moved to the compressor 13 side, and the screw portion 37 of the rotary shaft 14 is brought into contact with the screw hole 38 of the compressor 13. Subsequently, the screw portion 37 is screwed into the screw hole 38 by rotating in the circumferential direction while moving the turbine 12 and the rotary shaft 14 toward the compressor 13 by the fastening jig 52. At this time, the turbine 12 and the compressor 13 are fastened with a predetermined fastening force by rotating the turbine 12 with a predetermined fastening torque by the fastening jig 52. When the turbine 12, the compressor 13, and the rotating shaft 14 are assembled to the bearing housing 15C, a locking piece is attached to the sleeve of the thrust bearing 23 to support the rotating shaft 14 so that it cannot move in the axial direction. Then, the turbine housing 15A and the compressor housing 15B are fixed to the bearing housing 15C.

  As described above, in the method of assembling the turbocharger of the first embodiment, the step of supporting the compressor 13 so as not to move in the axial direction and the circumferential direction and the turbine 12 integrally provided with the rotary shaft 14 are supported. A step of supporting the turbine 12 so as to be movable in the direction and the circumferential direction, and a step of moving the turbine 12 to the compressor 13 side and bringing a screw portion 37 provided at the tip of the rotary shaft 14 into contact with a screw hole 38 formed in the compressor 13. And a step of rotating the turbine 12 in the circumferential direction while moving the turbine 12 toward the compressor 13 and screwing the screw portion 37 into the screw hole 38.

  Therefore, in a state where the compressor 13 is supported, the turbine 12 is rotated in the circumferential direction while moving toward the compressor 13, and the screw portion 37 is screwed into the screw hole 38. Therefore, it is not necessary to mount a jig or the like, and the outer diameter of the tip portion of the compressor 13 can be reduced. As a result, the supercharging ratio can be improved by ensuring a large passage area of the suction port 34 of the compressor 13 in which the tip of the compressor 13 is disposed. Alternatively, by making the passage area of the suction port 34 of the compressor 13 equal to the conventional one while maintaining the supercharging rate of the compressor 13, the outer diameter can be reduced and the apparatus can be made compact.

  In the supercharger assembling method of the first embodiment, the outer peripheral portion of the compressor 13 is supported by the locking pin 51 so as not to move in the axial direction and the circumferential direction with respect to the bearing housing 15C. Therefore, the compressor 13 can be easily supported with a simple configuration.

  In the supercharger assembling method of the first embodiment, the rotating shaft 14 is supported by the bearing housing 15C so as to be movable in the axial direction and the circumferential direction, and the turbine 12 is rotated while moving toward the compressor 13 to rotate the screw portion 37. Is screwed into the screw hole 38. Therefore, by connecting the compressor 13 and the turbine 12 using the bearing housing 15C, it is possible to improve workability by eliminating the need for a separate jig for supporting the compressor 13 and the turbine 12.

  In the compressor of the first embodiment, a through hole (fastening locking portion) 41 that locks the housing 15 in the circumferential direction so as not to move is provided in the outer peripheral portion. Therefore, when the turbine 12 is rotated in the circumferential direction while the compressor 13 is supported and the screw portion 37 is screwed into the screw hole 38 while moving the turbine 12 toward the compressor 13, the locking pin 51 is passed through the through hole 41. Thus, the compressor 13 can be easily supported by fitting into the locking holes 42 of the bearing housing 15C. Further, the processing cost can be reduced by using the fastening latching portion as the through hole 41.

[Second Embodiment]
FIG. 3 is a front view showing a compressor in the exhaust turbine supercharger of the second embodiment, FIG. 4 is a cross-sectional view showing an outer peripheral portion of a compressor impeller in the compressor, and FIG. 5 is an exhaust turbine excess of the second embodiment. Sectional drawing showing the principal part of a charger, FIG. 8 is the schematic showing the assembly method of the supercharger of 2nd Embodiment. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIG. 8, the turbine 12 is configured by integrally providing a rotating shaft 14, and the rotating shaft 14 has a threaded portion 37 formed at the tip, while the compressor 13 has a threaded hole 38 formed. Configured. Therefore, the turbine 12 is integrally connected to the compressor 13 by the screw portion 37 of the rotating shaft 14 being screwed into the screw hole 38 of the compressor impeller 26.

  The turbocharger assembling method of the second embodiment includes a step of supporting the turbine 12 integrally provided with the rotating shaft 14 so as not to move in the axial direction and the circumferential direction, and a fastening jig provided on the outer peripheral portion of the compressor 13. A screw hole formed in the compressor 13 in the screw portion 37 provided at the tip of the rotating shaft 14 by rotating the compressor 13 through the locking portion by a fastening jig. And 38 for screwing.

  Therefore, as shown in FIGS. 3 and 4, the compressor 13 of the second embodiment is used for fastening that is fixed to the outer peripheral portion of the compressor impeller 26 so as to be immovable in the circumferential direction with respect to the bearing housing 15 </ b> C (housing 15). A through-hole 46 is formed along the axial direction of the rotating shaft 14 as the rotation-side locking portion (fastening locking portion). A plurality of (three in the present embodiment) through holes 46 are formed at predetermined intervals in the circumferential direction of the compressor impeller 26. As shown in FIG. 8, the fastening jig 61 is configured by fixing one end portions of a plurality (three in this embodiment) of connecting jigs 63 of the jig main body 62. The fastening jig 61 can be fitted with the through holes 46 at the tip ends of the connecting shafts 63.

  The fastening rotation side locking portion (fastening locking portion) is not limited to the through hole 46. FIG. 6 is a front view illustrating a modification of the compressor of the second embodiment, and FIG. 7 is a cross-sectional view illustrating an outer peripheral portion of a compressor impeller in the compressor.

  As shown in FIGS. 6 and 7, the compressor 13 of the modification of the second embodiment is fastened to the outer peripheral portion of the compressor impeller 26 so as to be immovable in the circumferential direction with respect to the bearing housing 15 </ b> C (housing 15). A notch 47 is formed as a rotation side locking portion (fastening locking portion). A plurality (three in this embodiment) of the notches 47 are formed at predetermined intervals in the circumferential direction of the compressor impeller 26. As shown in FIG. 8, the fastening jig 61 can be fitted with the notches 47 at the tip ends of the connecting shafts 63.

  As shown in FIG. 7, the bearing housing 15 </ b> C is provided with a cover member 48 that covers the through hole 46 or the notch 47 from the suction port 34 side of the compressor 13. The cover member 48 is disposed on the diffuser 36 in the compressor housing 15B, and is fixed to the bearing housing 15C facing the compressor housing 15B. The end portion on the radial center side faces the through hole 46 or the notch 47. doing. In this case, it is preferable that the surface of the compressor impeller 26 and the surface of the cover member 48 coincide with each other in the axial position of the rotary shaft 14 and are continuous without a step.

  Therefore, as shown in FIG. 8, when assembling the exhaust turbine supercharger 11, first, journal bearings 21 and 22 and a sleeve of the thrust bearing 23 are mounted in the bearing housing 15 </ b> C, and then the turbine 12 is integrated with the turbine 12. The tip of the provided rotating shaft 14 is inserted from the other side in the axial direction into a support hole provided in the center of the bearing housing 15C, and the rotating shaft 14 is used as a sleeve for the journal bearings 21 and 22 and the thrust bearing 23. Support. Here, when the turbine 12 and the rotating shaft 14 are assembled to the bearing housing 15C, a locking piece is attached to the sleeve of the thrust bearing 23 to support the rotating shaft 14 so as not to move in the axial direction.

  And the front-end | tip part of each connection shaft 63 of the fastening jig 61 is fitted and supported in each through-hole 46 of the compressor 13, and the compressor 13 is supported by the fastening jig 61. FIG. Here, the screw hole 38 of the compressor 13 is brought into contact with the screw portion 37 of the rotating shaft 14 of the turbine 12. Subsequently, the screw portion 37 is screwed into the screw hole 38 by rotating in the circumferential direction while moving the compressor 13 toward the rotating shaft 14 by the fastening jig 61. At this time, the turbine 12 is non-rotatably supported by a fastening jig (not shown), and the compressor 13 is rotated with a predetermined fastening torque by the fastening jig 61, whereby the turbine 12 and the compressor 13 are fastened with a predetermined fastening force. Then, the turbine housing 15A and the compressor housing 15B are fixed to the bearing housing 15C.

  As described above, in the method of assembling the supercharger of the second embodiment, the step of supporting the turbine 12 on which the rotary shaft 14 is integrally provided so as to be immovable in the axial direction and the circumferential direction, and the fastening jig as a compressor The compressor 13 is engaged with a screw portion 37 provided at the tip of the rotary shaft 14 by rotating the compressor 13 through the locking portion by a fastening jig. And screwing the screw holes 38 formed in the.

  Accordingly, in a state where the turbine 12 is supported so as not to move, the compressor 13 is rotated by the fastening jig 61 through the through hole 46 (notch portion 47), whereby the screw portion 37 of the compressor 13 is screwed into the screw hole 38 of the compressor 13. Therefore, it is not necessary to attach a through-hole or a jig for rotation at the center of the compressor 13, and the outer diameter of the tip of the compressor 13 can be reduced. As a result, the supercharging ratio can be improved by ensuring a large passage area of the suction port 34 of the compressor 13 in which the tip of the compressor 13 is disposed. Alternatively, by making the passage area of the suction port 34 of the compressor equal to the conventional one while maintaining the supercharging rate of the compressor 13, the apparatus can be made compact by reducing the outer diameter thereof.

  In the compressor of the second embodiment, a through hole 46 and a notch 47 are provided as fastening portions for fastening with the fastening jig 61 on the outer peripheral portion. Therefore, the compressor 13 can be easily supported by the fastening jig 61 being locked to the through hole 46 and the notch 47 while the turbine 12 is supported, and the compressor 13 can be easily moved to the turbine 12 side. While rotating in the circumferential direction, the screw portion 37 can be screwed into the screw hole 38. Moreover, the processing cost can be reduced by using the fastening latching portion as the through hole 46 or the notch 47.

  In the turbocharger of the second embodiment, the cover member 48 that includes the turbine 12, the compressor 13, and the rotary shaft 14 and covers the through hole 46 or the notch 47 from the suction port 34 side of the compressor 13 is provided. Provided. Therefore, when the air is compressed by the compressor 13, the disturbance of the air flow due to the through hole 46 or the notch 47 can be suppressed.

[Third embodiment]
FIG. 9 is a schematic diagram illustrating a supercharger assembling method according to the third embodiment. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIG. 9, the turbine 12 is configured by integrally providing a rotating shaft 14, and the rotating shaft 14 has a threaded portion 37 formed at the tip, while the compressor 13 has a threaded hole 38 formed. Configured. Therefore, the turbine 12 is integrally connected to the compressor 13 by the screw portion 37 of the rotating shaft 14 being screwed into the screw hole 38 of the compressor impeller 26.

  The turbocharger assembling method of the third embodiment includes a step of supporting the turbine 12 integrally provided with the rotating shaft 14 so as not to move in the axial direction and the circumferential direction, and a fastening jig to the blade 27 of the compressor 13. A step of stopping, and a step of screwing a screw hole 38 formed in the compressor 13 into a screw portion 37 provided at the tip of the rotary shaft 14 by rotating the compressor 13 via the blade 27 by a fastening jig; have.

  Therefore, the fastening jig 71 is configured by fixing one end portions of the plurality of connecting shafts 73 of the jig body 72 and fixing the holding portions 74 to the other end portions of the connecting shafts 73. In the fastening jig 71, each holding portion 74 can hold the outer peripheral portion of each blade 27.

  Therefore, when assembling the exhaust turbine supercharger 11, first, journal bearings 21 and 22 and a sleeve of the thrust bearing 23 are mounted in the bearing housing 15 </ b> C, and then the rotating shaft 14 provided integrally with the turbine 12. The distal end portion is inserted from the other side in the axial direction into the support hole provided in the center portion of the bearing housing 15C, and the rotary shaft 14 is supported by the journal bearings 21 and 22 and the sleeve of the thrust bearing 23. Here, when the turbine 12 and the rotating shaft 14 are assembled to the bearing housing 15C, a locking piece is attached to the sleeve of the thrust bearing 23 to support the rotating shaft 14 so as not to move in the axial direction.

  The blades 27 of the compressor 13 are held by the holding portions 74 of the fastening jig 71, and the compressor 13 is supported by the fastening jig 71. Here, the screw hole 38 of the compressor 13 is brought into contact with the screw portion 37 of the rotating shaft 14 of the turbine 12. Subsequently, the screw portion 37 is screwed into the screw hole 38 by rotating in the circumferential direction while moving the compressor 13 toward the rotating shaft 14 by the fastening jig 71. At this time, the turbine 12 is non-rotatably supported by a fastening jig (not shown), and the compressor 13 is rotated at a predetermined fastening torque by the fastening jig 71, whereby the turbine 12 and the compressor 13 are fastened with a predetermined fastening force. Then, the turbine housing 15A and the compressor housing 15B are fixed to the bearing housing 15C.

  As described above, in the method of assembling the supercharger according to the third embodiment, the step of supporting the turbine 12 on which the rotary shaft 14 is provided so as to be immovable in the axial direction and the circumferential direction, and the fastening jig 71 are provided. The step of engaging with the blade 27 of the compressor 13 and the screw formed on the compressor 13 on the screw portion 37 provided at the tip of the rotary shaft 14 by rotating the compressor 13 via the blade 27 by the fastening jig 71. And screwing the holes 38 together.

  Accordingly, the screw hole 38 of the compressor 13 is screwed into the screw portion 37 of the rotating shaft 14 by rotating the compressor 13 via the blade 27 of the compressor 13 by the fastening jig 71 in a state where the turbine 12 is immovably supported. Therefore, it is not necessary to mount a through hole or a jig for rotation at the center of the compressor 13, and the outer diameter of the tip of the compressor 13 can be reduced. As a result, the supercharging ratio can be improved by ensuring a large passage area of the suction port 34 of the compressor 13 in which the tip of the compressor 13 is disposed. Alternatively, by making the passage area of the suction port 34 of the compressor 13 equal to the conventional one while maintaining the supercharging rate of the compressor 13, the outer diameter can be reduced and the apparatus can be made compact.

  In the above-described embodiment, in the first embodiment, the through hole 41 is provided as the fastening locking portion, and in the second embodiment, the through hole 46 or the notch portion 47 is provided as the fastening locking portion. However, the present invention is not limited to this configuration. That is, the fastening latching portion of the first embodiment only needs to be able to latch the compressor 13 to the housing 15 by the latching member, and the fastening latching portion of the second embodiment is the fastening jig 52. , 61 may be used to support the compressor 13, and in addition to the through hole and the cutout portion, a concave portion, a convex portion, a cutout portion having a small outer diameter, or the like may be used.

  Moreover, in embodiment mentioned above, the effect which makes the outer diameter dimension of the front-end | tip part of the compressor 13 small can be show | played, and it is good also considering the shape of the front-end | tip part of the compressor 13 as a tapered shape.

DESCRIPTION OF SYMBOLS 11 Exhaust turbine supercharger 12 Turbine 13 Compressor 14 Rotating shaft 15 Housing 21, 22 Journal bearing 23 Thrust bearing 24 Turbine disk 25 Turbine blade 26 Compressor impeller 27 Blade 34 Suction port 41 Through-hole (fastening locking part)
42 Locking hole 43 Connecting portion 46 Through hole (fastening locking portion)
47 Notch (fastening locking part)
48 Cover member 51 Locking pin (locking jig)
52, 61, 71 Fastening jig

Claims (12)

Supporting the compressor immovably in the axial and circumferential directions;
A step of supporting a turbine integrally provided with a rotating shaft so as to be movable in an axial direction and a circumferential direction;
Moving the turbine to the compressor side and bringing a screw portion provided at a tip of the rotary shaft into contact with a screw hole formed in the compressor;
Rotating the turbine in the circumferential direction while moving the turbine toward the compressor, and screwing the screw portion into the screw hole;
A method of assembling a supercharger, comprising:   The supercharger assembling method according to claim 1, wherein the outer peripheral portion of the compressor is supported by the locking member so as not to move in the axial direction and the circumferential direction with respect to the housing.   2. The rotary shaft is supported by a housing so as to be movable in an axial direction and a circumferential direction, and the turbine is rotated while moving toward the compressor, and the screw portion is screwed into the screw hole. Assembling method of supercharger as described in 4.   A compressor characterized in that a fastening portion for fastening is provided on the outer peripheral portion so as to be immovable in the circumferential direction with respect to the housing.   The compressor according to claim 4, wherein the fastening locking portion is a through-hole through which a locking jig passes. A compressor according to claim 4 or claim 5;
A turbine,
A rotating shaft integrally connecting the compressor and the turbine;
A turbocharger comprising: A step of supporting a turbine in which a rotating shaft is integrally provided so as to be immovable in an axial direction and a circumferential direction;
Locking the fastening jig to a locking portion provided on the outer peripheral portion of the compressor;
A step of screwing a screw hole formed in the compressor into a screw portion provided at a tip portion of the rotating shaft by rotating the compressor via the locking portion by a fastening jig;
A method of assembling a supercharger, comprising:   A compressor having a fastening portion for fastening a fastening jig on an outer peripheral portion.   The compressor according to claim 8, wherein the fastening locking portion is a through hole or a notch. A compressor according to claim 8 or 9, and
A turbine,
A rotating shaft integrally connecting the compressor and the turbine;
A turbocharger comprising:   The supercharger according to claim 6 or 10, further comprising a cover member that covers the fastening locking portion from the compressor suction port side. A step of supporting a turbine in which a rotating shaft is integrally provided so as to be immovable in an axial direction and a circumferential direction;
Locking the fastening jig to the compressor blade;
A step of screwing a screw hole formed in the compressor into a screw portion provided at a tip portion of the rotary shaft by rotating the compressor via the blade by the fastening jig;
A method of assembling a supercharger, comprising:

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