JP2013019287A - Variable guide vane device of compressor, method of assembling the same, and supercharger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable guide vane device of a compressor, along with a method of assembling the same, capable of reliably performing connection by inserting a turning shaft into one of shafts of guide vanes from the outside with a simple structure, and thereby capable of improving assembly workability, and to provide a supercharger.SOLUTION: A connection protrusion 36 extending in a diameter direction of a shaft 20 is formed at an end surface central part of the shaft 20 of a guide vane 19. A connection recess 39 engaged with the connection protrusion 36 formed at the shaft 20 of the guide vane is provided at a distal end of the turning shaft 40 to constitute a fitting means 60.

Description

  The present invention relates to a variable guide vane device for a compressor, an assembling method thereof, and a supercharger.

  Conventionally, a turbocharger that supercharges an engine is provided with a turbine impeller and a compressor impeller on the same axis, rotates the turbine impeller by exhaust of the engine, and rotates the compressor impeller via the rotating shaft, thereby taking in the intake air. It is equipped with a centrifugal compressor (compressor) that takes in and compresses and supplies the resulting compressed air to the engine.

  In the turbocharger compressor as described above, when the amount of air taken into the compressor decreases, the compressor characteristic curve exceeds the surge line and enters the surging region. Therefore, if the surge line can be moved to the low flow rate side to narrow the surging area, the operating range of the engine can be widened, which is beneficial.

  For this reason, conventionally, as a compressor in which the surge wire is moved to the low flow rate side so as not to enter the surging region even under the low flow capacity operation condition that enters the surging region, the compressor impeller upstream of the compressor impeller By providing a variable guide vane (VIGV: Variable Inlet Guide Vane = hereinafter simply abbreviated as a guide vane), the air flow toward the compressor impeller is pre-swirled to change the flow characteristics of the compressor. For example, Patent Documents 1 and 2 exist as compressors of this type.

  In the compressor described in Patent Document 1, a plurality of guide vanes are arranged radially in the circumferential direction inside the air inlet pipe (housing) that guides air to the compressor impeller, and each shaft of each guide vane passes through the housing. A rotation drive device corresponding to each shaft is provided outside the housing, and the rotation angles of the guide vanes are adjusted at the same time by simultaneously rotating the shafts by the rotation drive devices. I have to.

  On the other hand, in the compressor described in Patent Document 2, a plurality of guide vanes are arranged radially in the circumferential direction inside the housing that guides air to the compressor impeller, and each shaft of the guide vanes is provided in a space provided inside the housing. In addition, an arm extending in a direction orthogonal to the axis is attached to each shaft of the guide vane in the space, and an end portion of the arm is connected to the ring through another arm. A rotating shaft connected to one shaft of each guide vane is guided to the outside through the housing, and when the rotating shaft is rotated, the ring rotates through the arm and the other arm, When the ring rotates, the shafts rotate simultaneously through the other arm and the arm, and the rotation angles of the guide vanes are adjusted all at once.

JP 2005-023792 A JP 2004-190557 A

  In the compressor described in Patent Document 1, each shaft of the guide vane is guided to the outside through the housing, and each shaft is separately driven to rotate by a rotation driving device provided corresponding to the shaft. Therefore, although the structure inside the housing is relatively simple, it is necessary to arrange a plurality of rotational drive devices corresponding to the respective axes of the plurality of guide vanes outside the housing, so the structure outside the housing becomes complicated, In addition, since a plurality of rotational drive devices corresponding to the number of guide vanes are required, there is a problem that the cost is significantly increased. Further, when a plurality of rotary drive devices are installed outside the housing, there is a possibility that the rotary drive device may be damaged due to an external impact or the like. Further, there is a problem that control is required to drive the plurality of rotary drive devices in synchronization.

  On the other hand, in the compressor described in Patent Document 2, a space provided in the housing includes a ring, an arm for connecting each shaft of the guide vane and the ring, and another arm, and one shaft of the guide vane. Is rotated by a rotation shaft penetrating the housing, and by providing one drive device for rotating the rotation shaft, there is an advantage that the rotation angles of all the guide vanes can be adjusted simultaneously. Yes, the configuration outside the housing can be simplified.

  However, in Patent Document 2, it is necessary to connect an arm provided between each shaft of the guide vane and the ring and the other arm within a narrow space, and there is a problem that assembly work is very difficult. Further, in the configuration in which the force is transmitted between the shaft and the ring via the arm and the other arm, there is a possibility that an error occurs in the rotation of each guide vane due to variations in manufacturing accuracy of each part. Furthermore, although not specifically described in Patent Document 2, each shaft of the guide vane needs to pass through a hole in the inner wall forming the space of the housing and be rotatably supported by a bearing of this hole. As described above, when the shaft is provided with an arm in advance, the shaft may not be able to penetrate the hole in the inner wall.

  In order to solve the problem of assembly as described above, the shafts of the guide vane are provided so as to project outside through the housing, and the shafts are rotated simultaneously by a rotating ring mechanism provided outside the housing. It is also possible to make it move. However, when the rotating ring mechanism is provided outside the housing in this way, there is a problem that the outer shape of the compressor is increased, and the possibility of damage due to external impact or the like increases.

  Therefore, from the above viewpoint, it is preferable that the mechanism for rotating the guide vanes of the compressor all at once is provided inside the housing. However, when a mechanism for simultaneous rotation is provided in the housing, assembly, etc. There is a problem that the workability of the system becomes very poor. In particular, compressors equipped in in-vehicle turbochargers have been reduced in size and weight in recent years, and for such small compressors, the emergence of technology with excellent assembly workability is desired. Yes.

  In view of such circumstances, the present invention provides a variable guide vane for a compressor that can be reliably connected by inserting a rotating shaft from the outside to one of the shafts of the guide vane with a simple configuration, and can improve assembly workability. An apparatus, an assembling method thereof, and a supercharger are provided.

The present invention is configured by inserting a guide vane unit into the compressor inlet side into a housing in which a compressor impeller is rotatably disposed around a rotation axis.
The guide vane unit includes a plurality of guides that are radially arranged at equal intervals in the circumferential direction and between the bearing ring and the presser ring that are divided by facing surfaces in a direction intersecting the rotation axis. A ring gear is disposed in an annular groove formed in at least one of the opposed surfaces of the bearing ring and the presser ring, and a pinion that meshes with the ring gear is provided in each guide vane. Provided on the axis of
The housing is formed with a shaft hole for inserting and connecting a rotation shaft from the outside to one of the guide vane shafts of the guide vane unit inserted into the housing,
The present invention relates to a variable guide vane device for a compressor, characterized in that fitting means capable of connecting the tip of the rotating shaft to the end portion of the shaft of each guide vane is provided.

  According to the above means, the following operation can be obtained.

  Regardless of which of the plurality of guide vanes is located at the mounting portion of the rotating shaft, the tip of the rotating shaft can be securely connected to the shaft via the fitting means, and the guide vanes can be rotated all at once. Even in a small compressor provided with a mechanism for moving it inside the housing, the assembly workability is improved, which is advantageous in terms of cost.

  In the variable guide vane device of the compressor, a connection convex portion extending in a diameter direction of the shaft is formed at a central portion of an end surface of the shaft of the guide vane, and is fitted to a connection convex portion formed on the shaft of the guide vane By providing a connecting recess to the tip of the pivot shaft, the fitting means can be configured, and in this way, a guide vane is made of resin in order to facilitate manufacture and reduce weight, When the rotating shaft is made of a metal such as steel, it is easy to ensure the strength of the shaft of the guide vane on which the connection convex portion is formed, which is effective. Incidentally, if the connection concave portion is formed on the shaft of the guide vane, a portion where the thickness is reduced is generated, and there is a concern that the strength of the portion may be reduced. It does not occur on the guide vane shaft on which the part is formed.

Furthermore, as an assembly method of the variable guide vane device of the compressor,
The direction of the axial direction of the connecting convex portion with respect to the blade portion formed on each guide vane is unified in all the guide vanes, and the axial length of the connecting convex portion from the outer periphery of the bearing ring Set the length to protrude,
At the time of assembling the guide vane unit, an auxiliary ring formed with a concave groove into which the connection convex portion of each guide vane can be fitted is fitted on the outer periphery of the bearing ring,
By inserting the connecting convex portion of each guide vane into the concave groove of the auxiliary ring, the inclination angle of the blade portion of each guide vane can be adjusted. In this way, each guide vane Incorporation of the blade portion at an incorrect inclination angle is avoided, which is effective in further improving the assembly workability.

  On the other hand, the present invention relates to a turbocharger comprising the variable guide vane device for the compressor.

  According to the variable guide vane device of the compressor, the assembling method thereof, and the supercharger of the present invention, the rotation shaft can be inserted and reliably connected to one of the shafts of the guide vane with a simple configuration. An excellent effect of improving workability can be achieved.

(A) is the cutting | disconnection side view which shows the guide vane in the Example of the variable guide vane apparatus of the compressor of this invention, (b) is the top view which looked at the guide vane of (a) from the II direction. It is a cut side view for demonstrating the assembly state of the Example of the variable guide vane apparatus of the compressor of this invention. It is a cutaway side view showing the assembly completion state of the embodiment of the variable guide vane device of the compressor of the present invention. It is the top view which looked at FIG. 3 from the IV-IV direction. (A) is a side view which shows the state which assembled the guide vane unit in the Example of the variable guide vane apparatus of the compressor of this invention, (b) is the bearing ring in the Example of the variable guide vane apparatus of the compressor of this invention. It is the perspective view which looked at from the upper part. (A) is a front view which shows the ring gear in the Example of the variable guide vane apparatus of the compressor of this invention, (b) is sectional drawing which looked at the ring gear of (a) from VI-VI direction. (A) is the front view which shows the wave washer in the Example of the variable guide vane apparatus of the compressor of this invention, (b) is the side view which looked at the wave washer of (a) from the VII-VII direction. It is a front view which shows the retaining ring in the Example of the variable guide vane apparatus of the compressor of this invention. It is a top view which shows the state which fits and arrange | positions a guide vane in the bearing recessed part of the bearing ring in the Example of the variable guide vane apparatus of the compressor of this invention. (A) is a top view which shows the state which fits and arrange | positions a guide vane in the bearing recessed part of the bearing ring in the Example of the assembly method of the variable guide vane apparatus of the compressor of this invention using an auxiliary ring, (b) is. It is the side view which looked at the auxiliary ring of (a) from Xb-Xb direction.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 9 show an embodiment of a variable guide vane device for a compressor according to the present invention. A compressor 1 of a supercharger mounted on an automobile or the like has a housing 2 as shown in FIGS. A compressor impeller 3 is rotatably disposed therein, and the compressor impeller 3 is rotated by a rotating shaft 4 coaxial with a turbine impeller (not shown) that is rotated by exhaust of an automobile engine. Inside the housing 2 are a suction port 5 extending toward the inlet side of the compressor impeller 3 and a scroll 6 inside the housing 2 by converting the kinetic energy of the air whose speed is increased by the compressor impeller 3 into pressure energy. A diffuser 7 that leads to

  On the inlet side of the compressor impeller 3 in the housing 2 of the compressor 1, a step portion 8 formed in a cylindrical shape by expanding the suction port 5 is provided, and the step portion 8 has a notch bottom surface 8a and It consists of a notch inner peripheral surface 8b. On the other hand, a guide vane unit 9 having an outer surface fitted to the notch inner peripheral surface 8b of the step portion 8 and an extension portion 5a of the suction port 5 formed on the inner surface is provided inside the housing 2, and a variable guide A vane device is constructed.

  As shown in FIG. 5A, the guide vane unit 9 has a bearing ring 11 and a presser ring 12 that are divided by facing surfaces 10 a and 10 b in a direction orthogonal to the rotating shaft 4. Annular grooves 13 and 14 (see FIGS. 2 and 5B) are formed on the opposing surfaces 10a and 10b of the bearing ring 11 and the presser ring 12, respectively. An inner wall 15 and an outer wall 16 are formed on the opposing surfaces 10a and 10b of the bearing ring 11 and the presser ring 12, respectively.

  As shown in FIG. 5, a plurality of bearing recesses 21 are formed in the portions of the opposing surfaces 10a and 10b of the inner wall 15 and the outer wall 16, and the bearing recesses 21 and the blade portions 17 as shown in FIG. By supporting the shafts 20, 20 ′ of the guide vane 19 having the pinion 18, the guide vane 19 is arranged radially at equal intervals in the circumferential direction of the bearing ring 11. . In the example of FIG. 5, a case where a U-shaped bearing recess 21 having a depth capable of accommodating the shaft 20 of the guide vane 19 is formed on the facing surface 10 a of the bearing ring 11 is shown. The facing surface 10b of the presser ring 12 facing the recess 21 is a flat surface. The shaft 20 outside the guide vane 19 in FIG. 1 is fitted into a bearing recess 21 formed in the outer wall 16, and the shaft 20 ′ inside the guide vane 19 is fitted into a bearing recess 21 formed in the inner wall 15. At this time, the inner shaft 20 ′ of the guide vane 19 is provided with projections 20 a ′ and 20 b ′ for restraining the movement of the guide vane 19 in the axial direction by sandwiching the inner wall 15. . In place of the example shown in FIG. 5, the U-shaped bearing recess 21 may be formed on the opposing surface 10 b of the presser ring 12, and the opposing surface 10 a of the bearing ring 11 and the presser ring 12. A semicircular bearing recess 21 may be formed on both of the opposing surfaces 10b.

  Further, the opposing faces 10a and 10b of the outer wall 16 of the bearing ring 11 and the presser ring 12 are engaged with an engaging convex part 22 for fitting the bearing ring 11 and the presser ring 12 to each other. A recess 23 is formed. In the example shown in FIG. 5 (b), the engagement recesses 23 are formed at three locations on the facing surface 10 a of the outer wall 16 of the bearing ring 11, and the engaging surface 23 is formed on the facing surface 10 b of the outer wall 16 of the presser ring 12. Three engagement projections 22 that fit into the mating recesses 23 are formed, and the engagement projections 22 and the engagement recesses 23 are fitted together, so that the circumferential direction of the bearing ring 11 and the presser ring 12 is achieved. In addition, the movement in the direction orthogonal to the rotation shaft 4 is restricted. Instead of the example shown in FIG. 5, the engaging convex portion 22 may be formed on the facing surface 10 a of the bearing ring 11, and the engaging concave portion 23 may be formed on the facing surface 10 b of the holding ring 12.

  A ring gear 25 is inserted into one of the annular grooves 13 and 14 through pressing means 24. 2 and 3, the pressing means 24 and the ring gear 25 are inserted into the bottom of the annular groove 13 of the bearing ring 11 in which the U-shaped bearing recess 21 is formed. Here, when the U-shaped bearing recess 21 is formed in the holding ring 12, the pressing means 24 and the ring gear 25 may be inserted into the annular groove 14 of the holding ring 12. When the semicircular bearing recess 21 is formed on both the opposing surface 10b of the holding ring 10a and the pressing ring 12, the pressing means 24 and the ring gear 25 may be inserted into one of the annular grooves 13 and 14.

  As shown in FIGS. 6A and 6B, the ring gear 25 has rack teeth 25a formed on the end surface of a short cylindrical body. The rack teeth 25a of the ring gear 25 are formed in the bearing recess 21. It engages with the pinion 18 of the fitted guide vane 19. 6 shows the case where the rack teeth 25a are formed over the entire circumference, the rack teeth 25a may be formed only in the portion where the pinion 18 of the guide vane 19 meshes. The pinion 18 formed on the shaft 20 of one guide vane 19 is a so-called sector pinion formed only within the range in which the guide vane 19 rotates in the circumferential direction of the shaft 20, but has teeth on the entire circumference. A normal disk-shaped pinion 18 may be used.

  The pressing means 24 is for positively engaging the ring gear 25 with the pinion 18 of the guide vane 19, and as shown in FIGS. 7 (a) and 7 (b), an annular wave washer 26 is formed. Can be used. As shown in FIG. 7 (b), the wave washer 26 has a waved shape such that it protrudes or dents at three locations in the circumferential direction, thereby pushing the ring gear 25 at three locations to guide the ring gear 25 into guide vanes. It meshes with 19 pinions 18. As the pressing means 24, a coil spring can be used instead of the wave washer 26.

  As shown in FIGS. 2 and 3, a pin 28 is inserted into the compressor impeller side end surface 11a of the bearing ring 11 and the notch bottom surface 8a of the step portion 8 of the housing 2, and the bearing ring 11 and the housing of the guide vane unit 9 are inserted. Pin holes 29 and 30 for positioning in the circumferential direction with respect to 2 are recessed.

  As shown in FIGS. 5A and 5B, the guide vane unit 9 forms the engagement convex portion 22 and the engagement concave portion 23 that are fitted to each other on the bearing ring 11 and the presser ring 12. Thus, the bearing ring 11 and the presser ring 12 are provided with temporary fixing means for holding them together when assembled. The temporary fixing means can function by being designed in advance so that the engagement convex portion 22 and the engagement concave portion 23 are tightly fitted. It is also possible to fit 23 using a small amount of adhesive. Further, as shown in FIG. 5 (b), pin holes 31 (two in the illustrated example) are provided in the opposing surfaces 10 a and 10 b of the bearing ring 11 and the presser ring 12, and the pin holes 31 are tightly fitted. By inserting the matching pin 32, the bearing ring 11 and the presser ring 12 can be held together. The temporary fixing means is for holding the assembled guide vane unit 9 so as not to be disassembled when the guide vane unit 9 is inserted into the step portion 8 of the housing 2, and does not require strength.

  The housing 2 is provided with a fixing means 33 for fixing the guide vane unit 9 inserted into the step portion 8 in the step portion 8. In the example shown in FIGS. 2 and 3, an annular locking groove 34 is formed at the position of the notch inner peripheral surface 8 b corresponding to the open side end surface of the presser ring 12 of the guide vane unit 9 inserted into the step portion 8. A retaining ring 35 shown in FIG. 8 is inserted into the locking groove 34 in a contracted state, and is released and engaged by its elastic force, whereby the guide vane unit 9 is moved by the retaining ring 35 to the step portion 8. It is fixed so as not to come out. The fixing means 33 may be fixed to the housing 2 using a fixing bolt or the like so that the guide vane unit 9 does not come out of the stepped portion 8.

  In the case of the present embodiment, as shown in FIG. 1, a connecting convex portion 36 extending in the diameter direction of the shaft 20 is formed at the center of the end surface of the outer shaft 20 in the guide vane 19, and the guide vane 19 When the guide vane unit 9 is assembled by fitting the shafts 20, 20 ′ of the vane 19 into the bearing recesses 21 of the outer wall 16 and the inner wall 15 of the bearing ring 11, the tip of the connecting projection 36 is stepped. The length of the portion 8 is not in contact with the notch inner peripheral surface 8b. In the example shown in FIGS. 2 and 3, a fitting portion 37 that is closely fitted to each other is formed at the position of the notch inner peripheral surface 8 b close to the notch bottom surface 8 a of the step portion 8. The cutout inner peripheral surface 8 b on the open end side with respect to 37 has a diameter larger than that of the fitting portion 37. For this reason, there is a gap 38 between the notch inner peripheral surface 8 b and the outer peripheral surface of the guide vane unit 9, and therefore the tip of the connecting projection 36 of the guide vane 19 protrudes to the gap 38. It is length. The guide vane 19 may have such a length that the front end of the connecting projection 36 can be accommodated within the outer diameter of the guide vane unit 9. In this case, the notch inner peripheral surface 8 b and the guide are not provided without providing the gap 38. The outer peripheral surface of the vane unit 9 can be closely fitted.

  When the guide vane unit 9 is inserted into the step 8 of the housing 2, the housing 2 at a position corresponding to one shaft 20 of the guide vane 19 has a rotation shaft for rotating the shaft 20 of the guide vane 19. One shaft hole 41 for inserting 40 from the outside is provided. A connecting recess 39 is provided at the tip of the rotating shaft 40 to be fitted to a connecting projection 36 formed on the shaft 20 of the guide vane 19. The fitting means 60 which can connect the front-end | tip of the said rotating shaft 40 to the edge part of the axis | shaft 20 of the guide vane 19 is comprised. As shown in FIGS. 1 to 4, an operating pin 43 is attached to the other end of the rotating shaft 40 in the form of a crank via an arm 42. The operating pin 43 is attached to the other end of the rotating shaft 40 by an actuator not shown in FIG. The shaft 20 of one guide vane 19 is rotated through the connection recess 39 and the connection projection 36 by rotating the rotation shaft 40 by pushing and pulling in the arrow A direction. When the shaft 20 of one guide vane 19 is rotated by the rotation shaft 40, the ring gear 25 is rotated via the pinion 18, and all the guide vanes 19 are rotated simultaneously via the pinion 18 by the rotation of the ring gear 25. It comes to be moved.

  The constituent members including the bearing ring 11, the presser ring 12, the ring gear 25, and the guide vane 19 can be made of sintered metal, aluminum die casting, resin, or the like. All of these constituent members are integrally formed of resin. In the case of manufacturing by integral molding with the resin, machining, welding, finishing, etc. can be omitted, and the manufacturing process of the guide vane unit 9 is simplified and the cost is reduced. In addition, there is an advantage that the weight can be reduced, and further, the efficiency of the manufacturing process of the entire supercharger can be improved. As shown in FIG. 1, the guide vane 19 has a blade portion 17, a pinion 18, and projecting portions 20a 'and 20b' connecting projections 36 that are integrally provided with respect to the shafts 20 and 20 '. Molding is possible. Although the shape and dimensions of the guide vanes 19 may not be the same as each other, different shapes can be used, but only the guide vanes 19 connected to the rotation shaft 40 as the drive mechanism are different. In the case (for example, when the connection convex portion 36 is provided only on the guide vane 19 connected to the rotating shaft 40 and the connection convex portion 36 is not provided on the other guide vane 19), the guide vane unit 9 At the time of assembly, the operator needs to select the guide vane 19 having a different shape in accordance with the arrangement of the guide vane 19, which is troublesome for the operator. However, if the shape and dimensions of all the guide vanes 19 are the same as in the present embodiment, the above-described labor is not required, the assembly workability of the guide vane unit 9 is improved, and the guide vane unit 9 is improved. The efficiency of the manufacturing process and the manufacturing process of the entire supercharger can be further improved, which is preferable.

  Further, when at least one of the constituent members of the bearing ring 11 and the presser ring 12 and the guide vane 19 is made of resin, the resin has self-lubricating properties, so that the shafts 20 and 20 'of the guide vane 19 are connected to the bearing recess 21. It is possible to support the shaft suitably.

  Next, the procedure for assembling the compressor of the above embodiment will be described.

  First, it becomes possible to assemble the guide vane unit 9 outside the housing 2, and when the guide vane unit 9 is assembled, the bearing ring 11 is attached to the bearing as shown in FIGS. It mounts on a desk etc. so that the recessed part 21 may be in the state which faced the upper side.

  In this state, the wave washer 26 shown in FIG. 7 is inserted into the annular groove 13 of the bearing ring 11, and then the ring gear 25 (see FIG. 6) is inserted above the wave washer 26.

  Next, as shown in FIG. 9, the shaft 20 outside the guide vane 19 is fitted into the bearing recess 21 formed on the facing surface 10 a of the outer wall 16 of the bearing ring 11, and formed on the facing surface 10 a of the inner wall 15. The guide vane 19 is arranged so that the shaft 20 ′ inside the guide vane 19 is fitted in the bearing recess 21. At this time, the pinion 18 of the guide vane 19 meshes with the rack teeth 25 a of the ring gear 25, and the guide vane The 19 blade portions 17 are adjusted to have a predetermined inclination angle. Subsequently, shafts 20 and 20 'of another guide vane 19 are also fitted and arranged in another bearing recess 21 in FIG. 9, and at this time, the inclination angle of the blade portion 17 of the other guide vane 19 is the guide angle. Adjustment is made so as to be equal to the inclination angle of the vane portion 17 of the vane 19. Here, since the meshing between the rack teeth 25a of the ring gear 25 and the pinion 18 of the guide vane 19 is set in advance, when the guide vane 19 is arranged at the correct position, the inclination angle of the blade portion 17 of each guide vane 19 is In the unlikely event that the teeth are misaligned and engaged, the inclination angle of the vane portion 17 of the guide vane 19 will be greatly different, so the mistake when fitted incorrectly is relatively clear. It has become easier. In this way, the guide vanes 19 are fitted and arranged in all the bearing recesses 21.

  Subsequently, as shown in FIG. 5A, the opposing surface 10b of the presser ring 12 is opposed to the upper portion of the opposing surface 10a of the bearing ring 11, and the engaging convex portion 22 provided between them is engaged. The guide vane unit 9 is assembled by fitting the mating recess 23 and bringing the opposing surfaces 10a and 10b into contact with each other.

  When the guide vane unit 9 is assembled, it is assembled through temporary fixing means for holding the bearing ring 11 and the presser ring 12 together. For example, as shown in FIG. 5B, the bearing ring 11 is assembled by inserting and assembling a pin 32 that fits tightly into a pin hole 31 formed in the opposed surfaces 10a and 10b of the bearing ring 11 and the holding ring 12. And the presser ring 12 are held together. In addition, it is possible to hold the bearing ring 11 and the presser ring 12 in the same manner by designing them in advance so that the engaging convex portions 22 and the engaging concave portions 23 formed on the bearing ring 11 are tightly fitted. Similarly, the bearing ring 11 and the presser ring 12 can be integrally held by fitting the engaging convex portion 22 and the engaging concave portion 23 with a small amount of adhesive.

  In a state where the bearing ring 11 and the presser ring 12 are assembled, the pinion 18 of the guide vane 19 is pushed so as to elastically deform the wave washer 26 via the ring gear 25, thereby further engaging the ring gear 25 and the pinion 18. It will surely be done.

  Next, as shown in FIG. 2, after inserting the pin 28 into the pin hole 30 provided in the compressor impeller side end surface 11a of the bearing ring 11, the guide vane unit 9 assembled as described above is attached to the step portion of the housing 2. 8, the pin 28 is inserted so as to match the pin hole 29 provided in the notch bottom surface 8 a of the step portion 8 of the housing 2, and the guide vane unit 9 is inserted into the fitting portion 37 provided in the step portion 8. Mate. At this time, the circumferential position of the guide vane unit 9 relative to the housing 2 is defined by the pin 28, and at the same time, the shaft 20 of the blade portion 17 of the one guide vane 19 coincides with the shaft hole 41 formed in the housing 2.

  After inserting the guide vane unit 9 into the step portion 8 of the housing 2, the guide vane unit 9 is fixed to the step portion 8 by the fixing means 33. In the example of FIG. 2, the retaining ring shown in FIG. 8 is formed in the annular locking groove 34 formed in the inner peripheral surface 8 b of the notch corresponding to the open end surface of the presser ring 12 of the guide vane unit 9 inserted in the step portion 8. The guide vane unit 9 is fixed by the retaining ring 35 so as not to come out of the stepped portion 8 by being inserted in a contracted state, opened and engaged by its elastic force.

  Subsequently, the rotation shaft 40 is inserted from the shaft hole 41 provided in the housing 2, and the connection concave portion 39 provided at the tip of the rotation shaft 40 is fitted into the connection convex portion 36 of the shaft 20 of the guide vane 19. Then, the compressor 1 is assembled.

  Here, since the fitting means 60 capable of connecting the tip of the rotating shaft 40 to the end of the shaft 20 of each guide vane 19 is provided, which shaft 20 of the plurality of guide vanes 19 rotates. Even if it is located at the mounting portion of the shaft 40, the tip of the rotating shaft 40 can be reliably connected to the shaft 20 via the fitting means 60, and a mechanism for rotating the guide vanes 19 all at once is provided in the housing. Also in the small compressor 1 provided inside 2, the assembly workability is improved, which is advantageous in terms of cost.

  In addition, in this embodiment, a connection convex portion 36 extending in the diameter direction of the shaft 20 is formed at the center of the end surface of the outer shaft 20 in the guide vane 19, and the connection formed on the shaft 20 of the guide vane 19. Since the fitting means 60 is configured by providing a connecting recess 39 to be fitted to the convex portion 36 at the tip of the rotating shaft 40, the guide vane 19 is provided to facilitate manufacture and reduce the weight. When the rotating shaft 40 is made of a metal such as steel, the strength of the shaft 20 of the guide vane 19 on which the connection convex portion 36 is formed can be easily ensured and effective. Incidentally, if the connecting recess 39 is formed on the shaft 20 of the guide vane 19, there is a portion where the thickness is reduced, and there is a concern that the strength of the portion may be reduced. It does not occur on the shaft 20 of the guide vane 19 on which the connection convex portion 36 is formed.

  Thus, with a simple configuration, the rotating shaft 40 can be inserted and securely connected to one of the shafts 20 of the guide vane 19 to improve the assembly workability. In addition, since the assembly workability of the supercharger including the compressor 1 is improved, the production amount of the supercharger and the cost can be reduced.

  Furthermore, in the case of the variable guide vane device of the compressor in the present embodiment, as shown in FIG. 10A, the direction of the connecting convex portion 36 with respect to the blade portion 17 formed in each guide vane 19 in the diameter direction of the shaft 20. 10 is made uniform for all the guide vanes 19, and the length of the connecting projection 36 in the direction of the axis 20 is set so that the tip protrudes from the outer periphery of the bearing ring 11 by a required amount, as shown in FIG. As shown, a groove 61a is formed which is fitted on the outer periphery of the bearing ring 11 only when the guide vane unit 9 is assembled and into which the connection convex portion 36 of each guide vane 19 can be fitted. Each of the guide vanes is used in a state where the auxiliary ring 61 is removed, and the auxiliary ring 61 is fitted on the outer periphery of the bearing ring 11 when the guide vane unit 9 is assembled. By fitting the connecting protrusion 36 of 9 into the groove 61a, it is possible to adopt an assembling method of such the inclination angle of the blade part 17 of the respective guide vanes 19 are arranged equally.

  In the example shown in FIGS. 10A and 10B, the surface direction in which the blade portion 17 formed in each guide vane 19 spreads and the direction of the connecting convex portion 36 in the diameter direction of the shaft 20 are matched. When the connecting convex portion 36 is fitted into the concave groove 61a of the auxiliary ring 61, the blade portion 17 is set to be fully opened. However, the direction of the connecting convex portion 36 in the diameter direction of the shaft 20 can be shifted by 90 °, for example, so as to coincide with the direction perpendicular to the surface direction in which the blade portions 17 formed on the guide vanes 19 spread. In this case, when the connecting convex portion 36 is fitted into the concave groove 61a of the auxiliary ring 61, the blade portion 17 is set to be fully closed. Needless to say, the orientation of the connecting projection 36 in the diameter direction of the shaft 20 is not limited to the aforementioned angle, and can be selected as necessary.

  As shown in FIGS. 10A and 10B, the auxiliary ring 61 is used only when the guide vane unit 9 is assembled, and the auxiliary ring 61 is removed after the guide vane unit 9 is assembled. It is avoided that the portion 17 is incorporated at an incorrect inclination angle, which is effective in further improving the assembly workability.

  In addition, the variable guide vane device of the compressor of the present invention, its assembling method, and the supercharger are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Of course.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Housing 3 Compressor impeller 4 Rotating shaft 5a Extension part 9 Guide vane unit 10a Opposing surface 10b Opposing surface 11 Bearing ring 12 Press ring 13 Annular groove 14 Annular groove 17 Blade part 18 Pinion 19 Guide vane 20 Axis 20 'axis 21 Bearing concave portion 25 Ring gear 25a Rack tooth 36 Connection convex portion 39 Connection concave portion 40 Rotating shaft 41 Shaft hole 60 Fitting means 61 Auxiliary ring 61a Concave groove

Claims (4)

It is configured by inserting a guide vane unit so as to be fitted to the compressor inlet side inside a housing in which a compressor impeller is rotatably arranged around a rotation axis.
The guide vane unit includes a plurality of guides that are radially arranged at equal intervals in the circumferential direction and between the bearing ring and the presser ring that are divided by facing surfaces in a direction intersecting the rotation axis. A ring gear is disposed in an annular groove formed on at least one of the opposed surfaces of the bearing ring and the presser ring, and a pinion that meshes with the ring gear is provided in each guide vane. Provided on the axis of
The housing is formed with a shaft hole for inserting and connecting a rotation shaft from the outside to one of the guide vane shafts of the guide vane unit inserted into the housing,
A variable guide vane device for a compressor, comprising fitting means capable of connecting a tip end of the rotating shaft to an end portion of the shaft of each guide vane.   A connecting convex portion extending in the diameter direction of the shaft is formed at the center of the end surface of the shaft of the guide vane, and a connecting concave portion that fits into the connecting convex portion formed on the shaft of the guide vane is formed at the tip of the rotating shaft. The variable guide vane device for a compressor according to claim 1, wherein the fitting means is configured by providing. A method of assembling a variable guide vane device for a compressor according to claim 2,
The direction of the axial direction of the connecting convex portion with respect to the blade portion formed on each guide vane is unified in all the guide vanes, and the axial length of the connecting convex portion from the outer periphery of the bearing ring Set the length to protrude,
At the time of assembling the guide vane unit, an auxiliary ring formed with a concave groove into which the connection convex portion of each guide vane can be fitted is fitted on the outer periphery of the bearing ring,
The variable guide vane device for a compressor, wherein the inclination angle of the blade portion of each guide vane is adjusted by fitting the connecting convex portion of each guide vane into the concave groove of the auxiliary ring. Assembly method.   A turbocharger comprising the variable guide vane device for a compressor according to claim 1.

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