JP2008248700A - Impeller and manufacturing method for impeller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an impeller in which attitude of a blade part can be easily adjusted and connection strength, with respect to a boss part, of a mounting member connecting the impeller part to a boss part can be easily maintained, and to provide a manufacturing method for an impeller. <P>SOLUTION: The impeller comprises: the boss part 2 having a cylindrical side wall part 2a around a predetermined shaft and rotated around the predetermined shaft; the blade part 4 sending air by the rotation together with the boss part 2; the mounting member 6 mounting the blade part 4 to the side wall part 2a of the boss part 2; and first bolt 10a and a first nut 10b fastening the mounting member 6 to the side wall part 2a of the boss part 2. The mounting member 6 includes: an impeller support part 6a connected with the blade part 4 to support the blade part 4; and a mounting member boss connection part 6b fastened with respect to the side wall part 2a of the boss part 2. The side wall part 2a of the boss part 2 and the mounting member boss connection part 6b respectively have a first mounting hole 2c and a first mounting hole 6c in which the first bolt 10a is inserted with looseness. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an impeller that rotates around a predetermined axis and blows air and a method for manufacturing the impeller.

  Conventionally, various fan devices such as an air conditioning system, an outdoor unit of an air-cooled heat pump, and a ventilation fan have been provided with an impeller for blowing air, and Patent Document 1 below discloses an example of such an impeller.

  FIG. 4 is a cross-sectional view showing a specific structure of an impeller according to a conventional example. The impeller includes a boss portion 102, a blade portion 104, an attachment member 106, and a reinforcing member 108.

  The boss portion 102 is a portion located at the center of the impeller, and is formed in a cylindrical shape centered on a predetermined axis. The boss portion 102 rotates around the predetermined axis.

  The blade portion 104 is attached to the outer peripheral surface of the boss portion 102 via the attachment member 106 and rotates together with the boss portion 102 to blow air.

  The attachment member 106 is a member for attaching the blade portion 104 to the outer peripheral surface of the boss portion 102, and includes a blade support portion 106a and an attachment member boss coupling portion 106b.

  The blade support part 106 a is a part that is coupled to the blade part 104 and supports the blade part 104. The blade support portion 106 a extends radially outward from the outer peripheral surface of the boss portion 102, and a predetermined portion thereof overlaps the blade portion 104. And in the part which this blade | wing support part 106a and the blade | wing part 104 overlapped, these both members are couple | bonded by the rivet 110. FIG.

  The attachment member boss coupling portion 106 b is a portion coupled to the boss portion 102. The attachment member boss coupling portion 106b is bent from the portion on the boss portion 102 side of the blade support portion 106a upward along the outer peripheral surface of the boss portion 102. Then, the upper end edge of the attachment member boss coupling portion 106 b is fillet welded to the outer peripheral surface of the boss portion 102.

  The reinforcing member 108 is a member for reinforcing the mounting member 106. The reinforcing member 108 is disposed below the mounting member 106, and includes a mounting member support portion 108a and a reinforcing member boss coupling portion 108b.

  The attachment member support portion 108a is a portion that supports the attachment member 106 by being coupled to the blade support portion 106a. The attachment member support portion 108a extends radially outward from the outer peripheral surface of the boss portion 102 along the blade support portion 106a, and an outer edge portion thereof is fillet welded to the lower surface of the blade support portion 106a. In this way, the attachment member support portion 108a overlaps the blade support portion 106a to be doubled, whereby the blade support portion 106a of the attachment member 106 is reinforced.

  The reinforcing member boss coupling portion 108 b is a portion that couples to the side wall portion of the boss portion 102. The reinforcing member boss coupling portion 108b is bent from the portion on the boss portion 102 side of the attachment member support portion 108a downward along the outer peripheral surface of the boss portion 102. The bottom edge of the reinforcing member boss joint 108 b is fillet welded to the outer peripheral surface of the boss 102.

Further, when manufacturing this conventional impeller, after welding the attachment member support portion 108a of the reinforcement member 108 to the blade support portion 106a of the attachment member 106, the upper end edge of the attachment member boss coupling portion 106b and the reinforcement member boss The lower end edge of the joint portion 108b is temporarily welded to the outer peripheral surface of the boss portion 102. Thereafter, the blade portion 104 is coupled to the blade support portion 106 a of the attachment member 106 with the rivet 110. Next, while checking the shape and posture of the blade portion 104, the shape and posture of the blade portion 104 are adjusted by hitting the blade portion 104 with a mallet or the like and gradually deforming it. Finally, the upper end edge of the attachment member boss coupling portion 106 b and the lower end edge of the reinforcing member boss coupling portion 108 b are finally welded to the outer peripheral surface of the boss portion 102.
JP 2004-108199 A

  When the conventional impeller shown in FIG. 4 is manufactured, the attachment member 106 and the reinforcing member 108 are temporarily welded to the boss portion 102 as described above, and after the blade portion 104 is attached to the attachment member 106, the blade The part 104 is adjusted by hitting it with a mallet or the like while checking its shape and posture. However, at this time, if it is found that the posture of the blade portion 104 is greatly deviated from the posture to be set, the posture may not be corrected by simply striking and deforming the blade portion 104. Further, since the blade portion 104 and the attachment member 106 are fixed by the rivet 110, and the attachment member 106 and the reinforcing member 108 are welded to the boss portion 102, the relative positions of these members are shifted and the blades are shifted. It is also difficult to adjust the posture of the unit 104.

  Further, in this conventional impeller, the mounting member boss coupling portion 106b is fillet welded to the boss portion 102. However, problems such as cracks occur in the welded portion 106c of both members during maintenance of the impeller. It is difficult to judge just by visual inspection. Even if such a defect in the welded portion 106c can be found, it is necessary to perform complicated repair work such as re-welding. For this reason, in the conventional impeller, there exists a problem that it is difficult to perform the maintenance for maintaining the coupling strength with respect to the boss | hub part 102 of the attachment member 106. FIG.

  The present invention has been made to solve the above-described problems, and its object is to easily adjust the posture of the blade portion and to connect the blade portion to the boss portion. It is an object to provide an impeller and an impeller manufacturing method that can easily maintain the bonding strength with respect to.

  To achieve the above object, an impeller according to the present invention is an impeller that rotates around a predetermined axis and blows air, and has a cylindrical side wall centered on the predetermined axis, A boss portion that rotates about a predetermined axis, a blade portion that rotates together with the boss portion and blows air, an attachment member for attaching the blade portion to a side wall portion of the boss portion, and the attachment member for the boss portion And a first fastener for fastening to the side wall portion. The mounting member includes a blade support portion that is coupled to the blade portion and supports the blade portion, and an attachment member boss coupling portion that is fastened to a side wall portion of the boss portion, The side wall portion and the attachment member boss coupling portion each have a first attachment hole through which the first fastener is inserted in a state having play.

  In this impeller, the 1st attachment hole penetrated in the state in which a 1st fastener has a play is provided in the side wall part of a boss | hub part, and the attachment member boss | hub connection part, respectively. For this reason, when it turns out that the attitude | position of a blade | wing part has shifted | deviated from the attitude | position which should be set, the part for play of the 1st fastener in the said 1st attachment hole, and the blade | wing part couple | bonded to it Can be adjusted. Therefore, in this impeller, the posture of the blade portion can be easily adjusted. Moreover, in this impeller, since the coupling strength with respect to the boss | hub part of an attachment member can be maintained only by retightening a 1st fastener at the time of a maintenance, the coupling strength of these both members can be maintained easily. . Therefore, in this impeller, while the attitude | position of a blade | wing part can be adjusted easily, the coupling strength with respect to the boss | hub part of an attachment member can be maintained easily.

  In the impeller, the attachment member boss coupling portion and the side wall portion of the boss portion are provided with the first attachment holes at a plurality of locations along the peripheral surface of the side wall portion of the boss portion, respectively. preferable. If comprised in this way, the attachment member boss | hub connection part will be used as the side wall part of a boss | hub part using the 1st fastener in the 1st attachment hole provided in multiple places, respectively in the attachment member boss | hub connection part and the side wall part of a boss | hub part. In contrast, it can be fastened more securely.

  In the impeller, the blade support portion extends radially outward from the outer peripheral surface of the side wall portion of the boss portion, while the attachment member boss coupling portion is from a portion of the blade support portion on the boss portion side. You may be extended so that it may stand up along the outer peripheral surface of the said boss | hub part. In general, when the impeller rotates, centrifugal force outward in the radial direction acts on the blade portion. In the structure in which the attachment member boss coupling portion is bent and raised from the blade support portion in the attachment member, the blade support portion and the attachment member boss joint are connected to the centrifugal force from the coupling portion of the attachment member boss joint portion to the boss portion. A moment having a magnitude obtained by multiplying the distance to the boundary with the portion is applied to the joint portion, which causes a reduction in the strength of the joint portion. However, in this configuration, since the attachment member boss joint portion is fastened to the side wall portion of the boss portion by the first fastener, the durability against the moment is the fillet welded between the conventional attachment member boss joint portion and the boss portion. Compared to things. For this reason, even when the attachment member boss | hub coupling | bond part is bent and started from the blade | wing support part, the fall of the coupling strength with respect to the boss | hub part of an attachment member can be suppressed. In addition, when fastening the attachment member boss coupling portion and the side wall portion of the boss portion with the first fastener, compared to the case where the edge of the attachment member boss coupling portion is welded to the boss portion as in the prior art, Since the distance from the joint location of both members to the boundary portion between the blade support portion and the attachment member boss joint portion is small, the moment applied to the joint location is small. Therefore, also from such a reason, the fall of the joint strength with respect to the boss | hub part of an attachment member can be suppressed.

  The impeller further includes a reinforcing member that reinforces the mounting member, and a second fastener for fastening the reinforcing member to a side wall portion of the boss portion, and the reinforcing member is coupled to the blade support portion. And the reinforcing member boss coupling portion fastened to the side wall portion of the boss portion, the side wall portion of the boss portion and the reinforcing member boss coupling portion, It is preferable that each of the second fasteners has a second mounting hole that is inserted in a state having play. If comprised in this way, the blade | wing support part of an attachment member can be supported and reinforced by a reinforcement member, Therefore The durability of the attachment member which attaches a blade | wing part to a boss | hub part can be improved. Furthermore, in this structure, the 2nd attachment hole penetrated in the state in which a 2nd fastener has a play is provided in the side wall part of the boss | hub part, and the attachment member boss | hub connection part, respectively. For this reason, when it turns out that the attitude | position of a blade | wing part has shifted | deviated from the attitude | position which should be set, the part of play of a 2nd fastener in the said 2nd attachment hole, the attitude | position of a reinforcement member, an attachment member, and a blade | wing part Can be adjusted. Therefore, even when the reinforcing member is provided, the posture of the blade portion can be easily adjusted. Further, in this configuration, when the impeller is maintained, it is possible to maintain the coupling strength of the reinforcing member to the boss portion simply by retightening the second fastener, so that the coupling strength of these two members can be easily maintained. Can do.

  In this case, it is preferable that the second attachment holes are respectively provided at a plurality of locations along the peripheral surface of the side wall portion of the boss portion in the side wall portions of the reinforcing member boss coupling portion and the boss portion. . If comprised in this way, in the 2nd attachment hole provided in multiple each at the reinforcement member boss | hub coupling | bond part and the side wall part of a boss | hub part, a reinforcement member boss | hub connection part is used for the side wall part of a boss | hub part using a 2nd fastener. In contrast, it can be fastened more securely.

  In the configuration including the reinforcing member, the attachment member support portion extends along the blade support portion from the outer peripheral surface of the side wall portion of the boss portion to the radially outer side, while the reinforcing member boss coupling portion is You may extend so that it may fall along the outer peripheral surface of the said boss | hub part from the part by the side of the said boss | hub part of an attachment member support part. In the structure in which the reinforcing member boss coupling portion is bent and lowered from the mounting member support portion in the reinforcing member as in this configuration, the reinforcing member boss coupling portion is coupled to the boss portion due to the centrifugal force accompanying the rotation of the impeller. A moment having a magnitude obtained by multiplying the distance from the location to the boundary between the attachment member support portion and the reinforcing member boss coupling portion is applied to the coupling location, which causes a reduction in the strength of the coupling location. However, in this configuration, the reinforcing member boss coupling portion is fastened to the side wall portion of the boss portion by the second fastener, so that the durability against the moment is fillet welded between the conventional reinforcing member boss coupling portion and the boss portion. Compared to things. For this reason, even when the reinforcing member boss joint portion is bent and lowered from the attachment member support portion, it is possible to suppress a decrease in the bonding strength of the reinforcing member to the boss portion. In addition, when fastening the reinforcing member boss coupling portion and the side wall portion of the boss portion with the second fastener, as compared with the case where the edge of the reinforcing member boss coupling portion is welded to the boss portion as in the past, Since the distance from the joint location of both members to the boundary portion between the attachment member support portion and the reinforcing member boss joint portion is small, the moment applied to the joint location is small. Therefore, also from such a reason, the fall of the joint strength with respect to the boss | hub part of a reinforcement member can be suppressed.

  An impeller manufacturing method according to the present invention is a method of manufacturing an impeller that rotates around a predetermined axis and blows air, and forms a boss portion having a cylindrical side wall centered on the predetermined axis. A step of forming a blade portion that rotates together with the boss portion to blow air, a blade support portion that is coupled to the blade portion and supports the blade portion, and a side wall portion of the boss portion. Forming a mounting member having a mounting member boss coupling portion; mounting a mounting member boss coupling portion of the mounting member on a side wall portion of the boss portion using a first fastener; and After the step of mounting the attachment member boss coupling portion on the side wall portion of the portion, after the step of coupling the blade portion to the blade support portion of the attachment member, and the step of coupling the blade portion to the blade support portion, The relative position of the mounting member with respect to the boss portion After the step of adjusting the shape and posture of the blade part in a state that can be adjusted and the step of adjusting the shape and posture of the blade part, the first fastener is used to adjust the side wall portion of the boss portion. And fastening the mounting member boss joint.

  In this impeller manufacturing method, using the first fastener, after attaching the attachment member boss coupling portion of the attachment member to the side wall portion of the boss portion, the blade portion is coupled to the blade support portion of the attachment member, Then, the shape and attitude | position of a blade | wing part are adjusted in the state which can adjust the relative position of the attachment member with respect to a boss | hub part. For this reason, in the step of adjusting the shape and posture of the blade portion, the posture of the attachment member and the blade portion coupled thereto can be adjusted while adjusting the relative position of the attachment member with respect to the boss portion. Thereby, the attitude | position of a blade | wing part can be adjusted easily. Moreover, in this impeller manufacturing method, since the attachment member boss coupling portion is fastened to the side wall portion of the boss portion using the first fastener, only the first fastener is retightened during the maintenance of the impeller. Thus, the bonding strength of the mounting member to the boss can be maintained. Thereby, the joint strength of these both members can be maintained easily. Accordingly, in this impeller manufacturing method, the posture of the blade portion can be easily adjusted, and the coupling strength of the mounting member to the boss portion can be easily maintained.

  In the manufacturing method of the impeller, the mounting member supporting portion that is coupled to the blade supporting portion and supports the mounting member, and the reinforcing member boss coupling portion that is coupled to the side wall portion of the boss portion, Prior to the step of forming a reinforcing member for reinforcing the mounting member, the step of coupling the mounting member support portion of the reinforcing member to the blade support portion of the mounting member, and the step of adjusting the shape and posture of the blade portion, After the step of attaching the reinforcing member boss coupling portion of the reinforcing member to the side wall portion of the boss portion using the second fastener, and the step of adjusting the shape and posture of the blade portion, the second fastening A step of fastening the reinforcing member boss coupling portion to the side wall portion of the boss portion using a tool, and in the step of adjusting the shape and posture of the blade portion, the reinforcing member relative to the boss portion Adjustable position In preferable to adjust the shape and orientation of the wing portion. In this configuration, since the reinforcing member can support and reinforce the blade support portion of the attachment member, the durability of the attachment member for attaching the blade portion to the boss portion can be improved. Further, in this configuration, the second fastener can be used to adjust the relative position of the reinforcing member with respect to the boss portion after the reinforcing member boss coupling portion of the reinforcing member is attached to the side wall portion of the boss portion. To adjust the shape and posture of the blade. For this reason, in the process of adjusting the shape and posture of the blade portion, the posture of the reinforcing member, the mounting member, and the blade portion can be adjusted while adjusting the relative position of the reinforcing member with respect to the boss portion. Therefore, even when the reinforcing member is provided, the posture of the blade portion can be easily adjusted. Moreover, in this impeller manufacturing method, since the reinforcing member boss coupling portion is fastened to the side wall portion of the boss portion using the second fastener, only the second fastener is retightened during the maintenance of the impeller. Thus, the bonding strength of the reinforcing member to the boss portion can be maintained. Thereby, the joint strength of these both members can be maintained easily.

  As described above, according to the present invention, the attitude of the blade portion can be easily adjusted, and the coupling strength of the mounting member to the boss portion can be easily maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of an impeller according to an embodiment of the present invention. FIG. 2 is a perspective view partially showing an attachment structure of one blade portion 4 of the impeller shown in FIG. FIG. 3 is a cross-sectional view for explaining the mounting structure of the blade portion 4 shown in FIG. First, with reference to FIGS. 1-3, the structure of the impeller by one Embodiment of this invention is demonstrated.

  The impeller according to the present embodiment is used in various fan devices such as an air conditioning system, an outdoor unit of an air cooling heat pump, and a ventilation fan, and rotates around a predetermined axis to blow air. As shown in FIGS. 1 and 2, the impeller includes a boss portion 2, a blade portion 4, a mounting member 6, a reinforcing member 8, a first fastener 10, and a second fastener 12. ing.

  The boss portion 2 is made of iron and is located at the center of the impeller. The boss 2 has a side wall 2a and a bottom 2b. The side wall 2a is formed in a cylindrical shape centered on the predetermined axis, that is, the rotation axis of the impeller. As shown in FIG. 3, the side wall 2a has a plurality of first mounting holes 2c used when fastening the mounting member 6 and a plurality of second mounting holes 2d used when fastening the reinforcing member 8. And are provided. The first mounting holes 2c are arranged in a predetermined number (three in the present embodiment) at regular intervals in the circumferential direction of the boss portion 2. The second mounting holes 2d are provided on the upstream side of each first mounting hole 2c in the flow direction of the airflow generated by the rotation of the impeller (hereinafter referred to as the airflow direction), and a predetermined number (3 in this embodiment). Are arranged at equal intervals in the circumferential direction of the boss part 2. The bottom 2b is provided so as to close the opening on one end side of the side wall 2a. A shaft hole 2e into which a drive shaft (not shown) for rotating the impeller is inserted is provided at the center of the bottom 2b.

  The blade part 4 blows air by rotating together with the boss part 2. Three blade portions 4 are arranged around the boss portion 2 at equal intervals, and are attached to the side wall portion 2 a of the boss portion 2 via the attachment member 6. Each blade portion 4 is formed in the same shape using a light metal such as an aluminum alloy, and the blade tip corresponding to the outer edge portion is formed in an arc shape around the rotation axis of the impeller. Moreover, each blade | wing part 4 is arrange | positioned with the attitude | position which inclined so that it might go to an upstream in the said air flow direction while it becomes small as it goes to the front side in the rotation direction.

  The attachment member 6 is an iron member for attaching the blade portion 4 to the side wall portion 2 a of the boss portion 2, and is provided for each blade portion 4. The attachment member 6 has a blade support portion 6a and an attachment member boss coupling portion 6b.

  The blade support portion 6 a is a portion that is coupled to the blade portion 4 and supports the blade portion 4. The blade support portion 6 a extends radially outward from the outer peripheral surface of the side wall portion 2 a of the boss portion 2, and is disposed in an inclined posture similarly to the blade portion 4. The blade support portion 6a overlaps the downstream surface in the airflow direction of the portion from the inner edge side of the blade portion 4 to the vicinity of the intermediate portion in the width direction, and the blade support portion 6a and the blade in the overlapped portion. The parts 4 are connected by rivets 14. The rivets 14 are arranged at predetermined intervals along the outer periphery of the region where the blade support portion 6a and the blade portion 4 overlap. In addition, when fixing the blade | wing support part 6a and a blade | wing part with the rivet 14 in this way, since the protrusion part from the blade | wing support part 6a of the rivet 14 is comparatively small, the air produced by this protrusion part at the time of rotation of an impeller The flow disturbance is relatively small.

  The attachment member boss coupling portion 6 b is a portion coupled to the side wall portion 2 a of the boss portion 2. As shown in FIGS. 2 and 3, the attachment member boss coupling portion 6 b extends along the outer peripheral surface of the side wall portion 2 a of the boss portion 2 from the boss portion 2 side portion of the blade support portion 6 a to the downstream side in the air flow direction. It extends so as to stand up, and is disposed in an inclined posture like the blade support portion 6a. The mounting member boss coupling portion 6 b is fastened to the side wall portion 2 a of the boss portion 2 using the first fastener 10.

  Specifically, the first fastener 10 includes a first bolt 10a, a first nut 10b, and a first washer 10c. In addition, a plurality of (three in the present embodiment) first mounting holes 6c are formed in the mounting member boss coupling portion 6b at predetermined intervals in the longitudinal direction, in other words, in the circumferential direction of the boss portion 2. The first mounting hole 6 c is provided corresponding to the first mounting hole 2 c of the side wall 2 a of the boss 2. And the said 1st volt | bolt 10a is penetrated by the 1st attachment hole 6c of the attachment member boss | hub coupling | bond part 6b, and the 1st attachment hole 2c of the side wall part 2a of the boss | hub part 2, The said 1st volt | bolt 10a is said 1st. When the washer 10c is externally fitted and the first nut 10b is screwed together, the attachment member boss coupling portion 6b and the side wall portion 2a of the boss portion 2 are fastened. In the present embodiment, both the first mounting hole 2c of the side wall 2a of the boss 2 and the first mounting hole 6c of the mounting member boss joint 6b are inserted in a state where the first bolt 10a has play. It has a diameter.

  The reinforcing member 8 is an iron member for attaching the blade portion 4 to the side wall portion 2 a of the boss portion 2, and is provided for each blade portion 4. The reinforcing member 8 is disposed on the back surface side of the mounting member 6, that is, on the upstream side of the mounting member 6 in the airflow direction, and includes a mounting member support portion 8a and a reinforcing member boss coupling portion 8b. .

  The attachment member support portion 8a is a portion that supports the attachment member 6 by being coupled to the blade support portion 6a. The attachment member support portion 8a extends radially outward from the outer peripheral surface of the side wall portion 2a of the boss portion 2 along the blade support portion 6a, and is disposed in an inclined posture like the blade support portion 6a. ing. And the attachment member support part 8a has overlapped with the part of the inner edge vicinity of the blade | wing support part 6a, and when the outer edge part is fillet welded to the back surface of the blade | wing support part 6a, the attachment member support part 8a and a blade | wing support are carried out. The part 6a is coupled. As described above, the attachment member support portion 8a overlaps the blade support portion 6a to be doubled, whereby the blade support portion 6a of the attachment member 6 is supported and reinforced from the back surface side.

  The reinforcing member boss coupling portion 8 b is a portion coupled to the side wall portion 2 a of the boss portion 2. The reinforcing member boss coupling portion 8b extends from the portion on the boss portion 2 side of the mounting member support portion 8a so as to fall along the outer peripheral surface of the side wall portion 2a of the boss portion 2 from the upstream side in the airflow direction. In the same manner as the mounting member support portion 8a, the mounting member support portion 8a is disposed in an inclined posture. And this reinforcement member boss | hub coupling | bond part 8b is fastened by the side wall part 2a of the boss | hub part 2 using the said 2nd fastener 12. FIG.

  Specifically, the second fastener 12 includes a second bolt 12a, a second nut 12b, and a second washer 12c. In addition, a plurality of (three in the present embodiment) second mounting holes 8c are formed at predetermined intervals in the longitudinal direction of the reinforcing member boss coupling portion 8b, in other words, in the circumferential direction of the boss portion 2. The second mounting hole 8c is provided corresponding to the second mounting hole 2d formed in the side wall portion 2a of the boss portion 2. And the said 2nd volt | bolt 12a is penetrated by the 2nd attachment hole 8c of the reinforcement member boss | hub coupling | bond part 8b, and the 2nd attachment hole 2d of the side wall part 2a of the boss | hub part 2, The said 2nd volt | bolt 12a is said 2nd. When the washer 12c is fitted externally and the second nut 12b is screwed, the reinforcing member boss coupling portion 8b and the side wall portion 2a of the boss portion 2 are fastened. In the present embodiment, both the second mounting hole 2d of the side wall 2a of the boss 2 and the second mounting hole 8c of the reinforcing member boss joint 8b are inserted in a state where the second bolt 12a has play. It has a diameter.

  Next, a process for manufacturing the impeller according to the present embodiment will be described.

  When manufacturing the impeller according to the present embodiment, first, the boss portion 2, the blade portion 4, the attachment member 6, and the reinforcing member 8 having the above-described configuration are formed. Then, the outer edge part of the attachment member support part 8a of the reinforcement member 8 is fillet welded to the back surface of the blade support part 6a of the attachment member 6, and the attachment member 6 and the reinforcement member 8 are combined.

  Next, the attachment member boss coupling portion 6 b of the attachment member 6 is attached to the side wall portion 2 a of the boss portion 2 using the first fastener 10. Specifically, after the first bolt 10a is inserted through each first mounting hole 6c of the mounting member boss coupling portion 6b and the first mounting hole 2c of the side wall portion 2a of the corresponding boss portion 2, the first bolt 10a is inserted. The first washer 10c is fitted on the bolt 10a and the first nut 10b is screwed. And the attachment member boss | hub coupling | bond part 6b is temporarily fixed to the side wall part 2a of the boss | hub part 2 by lightly fastening with the 1st volt | bolt 10a and the 1st nut 10b. In this state, if the fastening by the first bolt 10a and the first nut 10b is loosened, the relative positions of the mounting member 6 and the boss portion 2 can be adjusted.

  On the other hand, the reinforcing member boss coupling portion 8 b of the reinforcing member 8 is attached to the side wall portion 2 a of the boss portion 2 using the second fastener 12. Specifically, after the second bolts 12a are inserted through the respective second mounting holes 8c of the reinforcing member boss coupling portion 8b and the second mounting holes 2d of the side wall portion 2a of the corresponding boss portion 2, this second bolt 12a is inserted. The second washer 12c is fitted on the bolt 12a and the second nut 12b is screwed. Then, the reinforcing member boss coupling portion 8b is temporarily fixed to the side wall portion 2a of the boss portion 2 by lightly fastening with the second bolt 12a and the second nut 12b. In this state, if the fastening by the second bolt 12a and the second nut 12b is loosened, the relative positions of the reinforcing member 8 and the boss portion 2 can be adjusted.

  Next, a predetermined portion of the blade portion 4 is overlapped on the back surface of the blade support portion 6 a of the mounting member 6, and both are coupled by the rivet 14.

  Thereafter, the outer edge of the blade portion 4 is cut so that the outer edge has an arc shape having a predetermined diameter.

  Next, the position of the front end and the rear end in the rotational direction of the impeller in the outer edge portion of the blade portion 4 is confirmed in the air flow direction, and then the relative positions of the attachment member 6 and the reinforcing member 8 with respect to the boss portion 2 are adjusted. The shape and posture of the blade part 4 are adjusted in a possible state.

  Specifically, while confirming the coordinates at a plurality of points in the blade part 4, the blade part 4 is struck by a hammer or a wooden hammer to be deformed, and the shape and attitude of the blade part 4 should be gradually set. Move closer to At this time, the blade portion 4 is applied to a dedicated jig for dimension setting, and the shape and posture of the blade portion 4 are gradually adjusted while checking the deviation of each point in the blade portion 4 from the normal dimension. And when it turns out that the attitude | position of the blade | wing part 4 has shifted | deviated from the attitude | position which should be set so that it cannot correct | amend only by striking and deform | transforming as mentioned above, by the 1st volt | bolt 10a and the 1st nut 10b By loosening the fastening and loosening the fastening by the second bolt 12a and the second nut 12b, the relative positions of the mounting member 6 and the reinforcing member 8 with respect to the boss 2 can be adjusted. Then, using the play of the first bolt 10a in the first mounting holes 2c and 6c and the play of the second bolt 12a in the second mounting holes 2d and 8c, the mounting member 6 and the reinforcing member 8 for the boss portion 2 are used. While adjusting the relative position, the posture of the blade portion 4 is adjusted to approach the posture to be set. Thereafter, the bolts and the nuts are lightly tightened again to adjust the shape of the blade portion 4 so that the shape and posture of the blade portion 4 should be set.

  Finally, the first bolt 10a and the first nut 10b are finally tightened, and the second bolt 12a and the second nut 12b are finally tightened, whereby the attachment member boss coupling portion 6b and the reinforcing member boss coupling portion 8b are connected. Fastened to the side wall 2 a of the boss 2. Thus, the impeller by this embodiment is produced.

  As described above, in the present embodiment, the first mounting holes 2c and 6c through which the first bolt 10a has play are provided in the side wall portion 2a of the boss portion 2 and the mounting member boss coupling portion 6b, respectively. In addition, the second mounting holes 2d and 8c through which the second bolt 12a has play are provided in the side wall portion 2a of the boss portion 2 and the reinforcing member boss coupling portion 8b, respectively. In the step of adjusting the shape and posture, the shape and posture of the blade portion 4 are adjusted in a state where the relative positions of the attachment member 6 and the reinforcing member 8 with respect to the boss portion 2 can be adjusted. For this reason, when it turns out that the attitude | position of the blade | wing part 4 has shifted | deviated from the attitude | position which should be set, the part of play of the 1st volt | bolt 10a in the said 1st attachment holes 2c and 6c, and the said 2nd attachment holes 2d The position of the mounting member 6, the reinforcing member 8 and the blade portion 4 is adjusted while adjusting the relative positions of the mounting member 6 and the reinforcing member 8 with respect to the boss portion 2 by the amount of play of the second bolt 12 a in the second bolt 12 a. be able to. Thereby, in this embodiment, the attitude | position of the blade | wing part 4 can be adjusted easily. Further, in the present embodiment, when the impeller is maintained, the coupling strength of the mounting member 6 to the boss portion 2 can be maintained by simply retightening the first bolt 10a and the first nut 10b. Bond strength can be easily maintained. Moreover, since the joint strength with respect to the boss | hub part 2 of the reinforcement member 8 can be maintained only by retightening the 2nd volt | bolt 12a and the 2nd nut 12b at the time of maintenance of an impeller, the joint strength of these both members is made easy. Can be maintained. Therefore, in this embodiment, while the attitude | position of the blade | wing part 4 can be adjusted easily, the coupling strength with respect to the boss | hub part 2 of the attachment member 6 and the reinforcement member 8 can be maintained easily.

  In the present embodiment, the attachment member boss coupling portion 6b and the side wall portion 2a of the boss portion 2 have first attachment holes 6c and 2c at a plurality of locations along the peripheral surface of the side wall portion 2a of the boss portion 2, respectively. Since the first attachment holes 6c and 2c provided at the plurality of locations are provided, the attachment member boss coupling portion 6b is more securely attached to the side wall portion 2a of the boss portion 2 by using the first fastener 10. Can be concluded.

  In the present embodiment, the blade support portion 6a of the attachment member 6 extends radially outward from the outer peripheral surface of the side wall portion 2a of the boss portion 2, while the attachment member boss coupling portion 6b is the boss portion of the blade support portion 6a. It extends so that it may stand up along the outer peripheral surface of the boss | hub part 2 from the part of 2 side.

  In general, when the impeller rotates, centrifugal force outward in the radial direction acts on the blade portion 4. In the structure in which the attachment member boss coupling portion 6b is bent and raised from the blade support portion 6a in the attachment member 6, the blade support portion is moved from the coupling portion of the attachment member boss coupling portion 6b to the boss portion 2 due to the centrifugal force. A moment having a magnitude multiplied by a distance L1 (see FIG. 3) to the boundary between 6a and the attachment member boss coupling portion 6b is applied to the coupling portion, which causes a reduction in the strength of the coupling portion.

  However, in this embodiment, since the attachment member boss joint 6b is fastened to the side wall 2a of the boss 2 by the first bolt 10a and the first nut 10b, the durability against the moment has a conventional attachment member boss joint. 106b (refer FIG. 4) and the boss | hub part 102 are improved compared with what was fillet welded. For this reason, even if the attachment member boss coupling portion 6b is bent and raised from the blade support portion 6a, a decrease in the coupling strength of the attachment member 6 to the boss portion 2 can be suppressed.

  Further, when fastening the mounting member boss coupling portion 6b and the side wall portion 2a of the boss portion 2 with the first bolt 10a and the first nut 10b, the blade support portion 6a and the mounting member boss coupling portion 6b are connected from the joint location of both members. The distance L1 to the boundary between the blade support portion 106a and the attachment member boss joint portion 106b from the welded portion 106c of both members when the edge of the conventional attachment member boss joint portion 106b is fillet welded to the boss portion 2 Is smaller than the distance L101 to the boundary portion (see FIG. 4), and therefore the moment applied to the connecting portion is reduced. Therefore, also from such a reason, the fall of the joint strength with respect to the boss | hub part 2 of the attachment member 6 can be suppressed.

  Moreover, in this embodiment, since the reinforcement member 8 which supports and reinforces the blade | wing support part 6a of the attachment member 6 is provided, durability of the attachment member 6 which attaches the blade | wing part 4 to the boss | hub part 2 is improved. Can do.

  In this embodiment, the reinforcing member boss coupling portion 8b and the side wall portion 2a of the boss portion 2 have second mounting holes 8c and 2d at a plurality of locations along the peripheral surface of the side wall portion 2a of the boss portion 2, respectively. Since the second attachment holes 8c and 2d provided at the plurality of locations are provided, the reinforcing member boss coupling portion 8b is more securely attached to the side wall portion 2a of the boss portion 2 using the second fastener 12. Can be concluded.

  In the present embodiment, the attachment member support portion 8a of the reinforcement member 8 extends along the blade support portion 6a radially outward from the outer peripheral surface of the side wall portion 2a of the boss portion 2, while the reinforcement member boss coupling portion. 8b is extended so that it may fall along the outer peripheral surface of the boss | hub part 2 from the part by the side of the boss | hub part 2 of the attachment member support part 8a. In this way, in the structure in which the reinforcing member boss coupling portion 8b is bent and lowered from the mounting member support portion 8a in the reinforcing member 8, the reinforcing member boss coupling portion with respect to the boss portion 2 due to the centrifugal force accompanying the rotation of the impeller. A moment having a magnitude multiplied by a distance L2 (see FIG. 3) from the connecting portion 8b to the boundary between the mounting member support portion 8a and the reinforcing member boss connecting portion 8b is applied to the connecting portion, and the strength of the connecting portion is determined. It becomes a factor to reduce.

  However, in this embodiment, since the reinforcing member boss joint portion 8b is fastened to the side wall portion 2a of the boss portion 2 by the second bolt 12a and the second nut 12b, the durability against the moment has a conventional reinforcing member boss joint portion. 108b (refer FIG. 4) and the boss | hub part 102 are improved compared with what was fillet welded. For this reason, even in the configuration in which the reinforcing member boss coupling portion 8b is bent and lowered from the attachment member supporting portion 8a, it is possible to suppress a decrease in the coupling strength of the reinforcing member 8 to the boss portion 2.

  Further, when the reinforcing member boss coupling portion 8b and the side wall portion 2a of the boss portion 2 are fastened by the second bolt 12a and the second nut 12b, the mounting member support portion 8a and the reinforcing member boss coupling portion are connected from the coupling position of both members. When the distance L1 to the boundary with 8b is fillet welded to the boss portion 102 at the edge of the conventional reinforcing member boss joint portion 108b, the attachment member support portion 108a and the reinforcing member boss joint portion are connected to each other. Since the distance is smaller than the distance L102 (see FIG. 4) to the boundary with 108b, the moment applied to the connecting portion is reduced. Therefore, also from such a reason, the fall of the joint strength with respect to the boss | hub part 2 of the reinforcement member 8 can be suppressed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, although the reinforcing member 8 for reinforcing the attachment member 6 is provided in the above embodiment, the present invention is not limited to this, and the reinforcing member 8 may be omitted in the configuration of the above embodiment.

  Moreover, in the said embodiment, although the reinforcement member 8 was combined by fillet welding with respect to the attachment member 6, not only this but the reinforcement member 8 is couple | bonded with the attachment member 6 using coupling means other than the above. You may let them. For example, the reinforcing member 8 may be fastened to the mounting member 6 using bolts and nuts, or the reinforcing member 8 may be fixed to the mounting member 6 using rivets.

  Moreover, in the said embodiment, although the blade | wing part 4 was fixed to the blade | wing support part 6a of the attachment member 6 using the rivet 14, it does not restrict to this but the blade | wing part 4 is attached to the attachment member 6 using coupling means other than the rivet 14. You may attach to the blade | wing support part 6a. For example, you may fasten the blade | wing part 4 to the blade | wing support part 6a of the attachment member 6 using a volt | bolt and a nut.

  Moreover, in the said embodiment, when mounting the attachment member boss | hub coupling | bond part 6b with respect to the side wall part 2a of the boss | hub part 2 using the 1st fastener 10 in the manufacturing process of an impeller, it is 1st bolt 10a and 1st. Although the mounting member boss coupling portion 6b is lightly fastened and temporarily fixed to the side wall portion 2a of the boss portion 2 by the nut 10b, the mounting of the mounting member boss coupling portion 6b to the boss portion 2 is not limited to this method. That is, when the mounting member boss coupling portion 6b is attached to the side wall portion 2a of the boss portion 2, the first bolt 10a is inserted into the first mounting holes 2c and 6c, and the first nut 10b is screwed into the first bolt 10a. It is good also as a state which does not tighten the 1st nut 10b only by making it do. In this case, in the step of adjusting the shape and posture of the blade portion 4, the posture of the blade portion 4 is adjusted while adjusting the relative position of the mounting member 6 with respect to the boss portion 2 without loosening the first nut 10b. Is possible.

  Moreover, in the said embodiment, when attaching the reinforcement member boss | hub connection part 8b with respect to the side wall part 2a of the boss | hub part 2 using the 2nd fastener 12 in the manufacturing process of an impeller, it is 2nd bolt 12a and 2nd. Although the reinforcing member boss coupling portion 8b is lightly fastened and temporarily fixed to the side wall portion 2a of the boss portion 2 by the nut 12b, the mounting of the reinforcing member boss coupling portion 8b to the boss portion 2 is not limited to such a method. That is, as in the case of the attachment member boss coupling portion 6b, the reinforcing member boss coupling portion 8b may be attached to the side wall portion 2a of the boss portion 2 without tightening the second nut 12b. In this case, in the step of adjusting the shape and posture of the blade portion 4, the posture of the blade portion 4 is adjusted while adjusting the relative position of the reinforcing member 8 to the boss portion 2 without loosening the second nut 12b. Can do.

It is a front view of the impeller by one Embodiment of this invention. It is the perspective view which showed partially the attachment structure of one blade | wing part among the impellers shown in FIG. It is sectional drawing for demonstrating the attachment structure of the blade | wing part shown in FIG. It is sectional drawing which shows the specific structure of the impeller by an example of the past.

Explanation of symbols

2 Boss portion 2a Side wall portion 2c First attachment hole 2d Second attachment hole 4 Blade portion 6 Attachment member 6a Blade support portion 6b Attachment member boss coupling portion 6c First attachment hole 8 Reinforcement member 8a Attachment member support portion 8b Reinforcement member boss coupling Part 8c Second mounting hole 10 First fastener 12 Second fastener

Claims (8)

An impeller that rotates around a predetermined axis and blows air,
A boss portion having a cylindrical side wall centered on the predetermined axis and rotating about the predetermined axis;
A blade portion that rotates together with the boss portion and blows air;
An attachment member for attaching the blade part to the side wall part of the boss part;
A first fastener for fastening the mounting member to the side wall portion of the boss portion;
The attachment member includes a blade support portion that is coupled to the blade portion and supports the blade portion, and an attachment member boss connection portion that is fastened to a side wall portion of the boss portion,
The side wall portion of the boss portion and the attachment member boss coupling portion each have a first attachment hole through which the first fastener is inserted in a state having play.   The said attachment member boss | hub coupling | bond part and the side wall part of the said boss | hub part are respectively provided with the said 1st attachment hole in the several places along the surrounding surface of the side wall part of the said boss | hub part. Impeller.   The blade support portion extends radially outward from the outer peripheral surface of the side wall portion of the boss portion, while the attachment member boss coupling portion extends from the boss portion side portion of the blade support portion to the outer periphery of the boss portion. The impeller of Claim 1 or 2 extended so that it may stand up along a surface. A reinforcing member for reinforcing the mounting member;
A second fastener for fastening the reinforcing member to the side wall portion of the boss portion;
The reinforcing member includes an attachment member support portion that is coupled to the blade support portion and supports the attachment member, and a reinforcement member boss joint portion that is fastened to a side wall portion of the boss portion,
The side wall part of the said boss | hub part and the said reinforcement member boss | hub coupling | bond part each have the 2nd attachment hole penetrated in the state in which the said 2nd fastener has a play, Each of Claims 1-3. The impeller described in 1.   The said reinforcement member boss | hub coupling | bond part and the side wall part of the said boss | hub part are each provided with the said 2nd attachment hole in the several places along the surrounding surface of the side wall part of the said boss | hub part. Impeller.   The attachment member support portion extends along the blade support portion from the outer peripheral surface of the side wall portion of the boss portion to the outside in the radial direction, while the reinforcing member boss coupling portion is the boss portion of the attachment member support portion. 6. The impeller according to claim 4, wherein the impeller extends from a portion on the side so as to fall along an outer peripheral surface of the boss portion. A manufacturing method of an impeller that rotates around a predetermined axis and blows air,
Forming a boss having a cylindrical side wall centered on the predetermined axis;
Forming a blade portion that rotates together with the boss portion to blow air;
A step of forming an attachment member having a blade support portion that is coupled to the blade portion and supports the blade portion, and an attachment member boss coupling portion that is coupled to a side wall portion of the boss portion;
Attaching the attachment member boss coupling portion of the attachment member to the side wall portion of the boss portion using the first fastener;
After the step of mounting the attachment member boss coupling portion on the side wall portion of the boss portion, the step of coupling the blade portion to the blade support portion of the attachment member;
After the step of coupling the blade portion to the blade support portion, the step of adjusting the shape and posture of the blade portion in a state where the relative position of the attachment member with respect to the boss portion is adjustable;
After the step of adjusting the shape and posture of the blade portion, using the first fastener, the step of fastening the attachment member boss coupling portion to the side wall portion of the boss portion, Production method. A reinforcing member for reinforcing the mounting member, the mounting member supporting portion supporting the mounting member by coupling to the blade supporting portion; and a reinforcing member boss coupling portion coupled to the side wall portion of the boss portion. Forming, and
Coupling the attachment member support portion of the reinforcing member to the blade support portion of the attachment member;
Prior to the step of adjusting the shape and posture of the blade portion, using the second fastener, attaching the reinforcing member boss joint portion of the reinforcing member to the side wall portion of the boss portion;
After the step of adjusting the shape and posture of the blade portion, using the second fastener, the step of fastening the reinforcing member boss coupling portion to the side wall portion of the boss portion,
The impeller according to claim 7, wherein in the step of adjusting the shape and posture of the blade portion, the shape and posture of the blade portion is adjusted in a state where the relative position of the reinforcing member with respect to the boss portion is adjustable. Manufacturing method.

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