CN111720360B - Centrifugal impeller - Google Patents
Centrifugal impeller Download PDFInfo
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- CN111720360B CN111720360B CN202010200590.8A CN202010200590A CN111720360B CN 111720360 B CN111720360 B CN 111720360B CN 202010200590 A CN202010200590 A CN 202010200590A CN 111720360 B CN111720360 B CN 111720360B
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- main plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a centrifugal impeller. The centrifugal impeller is provided with: a circular main plate having a through hole at a central portion thereof; a hub having an outer surface of a substantially truncated cone shape, formed in a cylindrical shape coaxially connected with the through-hole, and protruding from the circular main plate; and a plurality of blade portions that protrude from the circular main plate and the hub at positions that do not overlap with each other when viewed from a direction along an axis of the through-hole, the centrifugal impeller having a highly efficient three-dimensional shape and being capable of being manufactured efficiently and at low cost. A circular main plate (39), a hub (40), and blade sections (41) are integrally provided on a resin-made impeller main body (35A), a cut hole (42) having a shape including a projection of the blade sections (41) in a direction along the axis of a through hole (38) is formed in the impeller main body (35A), a resin-made interpolation member (36A) is joined to the impeller main body (35A), and the interpolation member (36A) has an interpolation section (44) that fills the cut hole (42) and is smoothly connected to the surfaces of the circular main plate (39), the hub (40), and the blade sections (41).
Description
Technical Field
The present invention relates to a centrifugal impeller including: a circular main plate having a through hole in the center thereof through which the support shaft is inserted; a boss having a substantially frustoconical outer surface, formed in a cylindrical shape coaxially connected to the through-insertion hole, and protruding from the circular main plate to one axial side of the through-insertion hole; and a plurality of blade portions having a twisted portion at an end portion on the hub side, protruding from the circular main plate and the hub to one side in the axial direction at positions that do not overlap with each other when viewed from a direction along the axis of the through-hole.
Background
Patent document 1 discloses a centrifugal fan formed by axially molding and made of a resin and axially divided into an inlet portion and an outlet portion by 2, and patent document 2 discloses a centrifugal fan in which blades are formed by hub-side blades integrally formed with a hub and shroud-side blades integrally formed with a shroud.
Patent document 1: japanese laid-open patent publication No. 59-018296
Patent document 2: japanese patent No. 5269025
In the structure disclosed in patent document 1, the inlet portion and the outlet portion are thick in the axial direction, which results in an increase in the axial size of the centrifugal impeller. Further, the blade portion of the inlet portion is in a suspended state, and the structure of the blade portion made of resin is easily weakened, and vibration and noise are easily generated.
In the structure disclosed in patent document 2, when the hub-side blade integrally formed with the hub is twisted in order to improve the efficiency of fluid delivery, a complicated die having a slide core, a bending core, a drawing core, and the like is required in order to prevent undercutting (undercut), which leads to an increase in cost.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide a centrifugal impeller having a three-dimensional shape with high efficiency and capable of being manufactured efficiently at low cost.
In order to achieve the above object, a 1 st aspect of the present invention is a centrifugal impeller including: a circular main plate having a through hole in the center thereof through which the support shaft is inserted; a boss having an outer surface of a substantially truncated cone shape, formed in a cylindrical shape coaxially connected to the through hole, and protruding from the circular main plate to one side in an axial direction of the through hole; and a plurality of blade portions that have a twisted portion at an end portion on the hub side and protrude from the circular main plate and the hub to one side in the axial direction at positions that do not overlap with each other when viewed in a direction along the axis of the through hole, wherein the circular main plate, the hub, and the blade portions are integrally provided on a resin-made impeller main body, a cutout hole having a shape including a projection of the blade portion in the direction along the axis of the through hole is formed in the impeller main body, a resin-made interpolation member is coupled to the impeller main body from the other side along the axis of the through hole, and the interpolation member has an interpolation portion that fills the cutout hole and is smoothly connected to surfaces of the circular main plate, the hub, and the blade portions. .
In addition to the configuration according to claim 1, according to a 2 nd aspect of the present invention, the interpolation unit integrally includes: a circular auxiliary plate abutting against the circular main plate from the other axial side of the through hole; and the interpolation portion protruding from the circular auxiliary plate, the interpolation portion being formed to have: a main board interpolation section that fills a portion of the cutout hole corresponding to the circular main board; and a hub interpolation section that fills a portion of the cutout hole corresponding to the hub.
A 3 rd feature of the present invention is that, in addition to the configuration of the 2 nd feature, a resin front surface plate is brought into contact with the plurality of blade portions from a side opposite to the interpolation member, and the front surface plate is formed with an engagement portion that engages with a boss portion that is provided integrally with the blade portions and protrudes toward the front surface plate side.
Further, according to a 4 th aspect of the present invention, in addition to the 2 nd aspect, a resin front surface plate abuts against the plurality of blade portions from a side opposite to the interpolation member, a cutout portion is formed in a side surface of the blade portion facing the cutout hole side, an engagement portion with which a boss portion is engaged is formed in the front surface plate, and the boss portion is integrally provided in the interpolation member, fills the cutout portion, and protrudes toward the front surface plate side.
According to the first aspect of the present invention, since the cut hole having the shape including the projection of the blade portion is formed in the resin-made impeller main body integrally including the circular main plate, the hub, and the blade portion, even if the blade portion is a three-dimensional blade portion having a twisted portion, the undercut shape at the time of resin molding can be avoided, and further, since the cut hole is filled with the interpolation portion of the resin-made interpolation member, the centrifugal impeller having the three-dimensional blade portion with high efficiency can be manufactured at low cost and with a small thickness. Further, since the die apparatus for molding such a centrifugal impeller does not require a slide core, a bending core, a drawing core, and the like, and a movable mechanism for driving them, the manufacturing cost is significantly reduced. Further, since the movable mechanism is not required, a plurality of cavities can be provided in a space that is left over, and a large number of parts of the centrifugal impeller can be manufactured at once using a so-called "multi-cavity resin molding die", and therefore, a three-dimensional centrifugal impeller can be manufactured at low cost.
Further, according to the 2 nd aspect of the present invention, an interpolation portion of an interpolation member protruding from a circular auxiliary plate includes: a main board interpolation section for burying a portion of the cutout hole corresponding to the circular main board; and a hub interpolation section that fills a portion of the cutout hole corresponding to the hub, so that it is possible to prevent a connecting portion provided to connect the torsion portion of the blade section and the hub from being undercut.
According to the aspect 3 of the present invention, since the boss portion provided integrally with the blade portion is engaged with the engagement portion formed on the front surface plate, the impeller main body and the front surface plate can be easily joined to each other.
Further, according to the 4 th aspect of the present invention, since the boss portion provided integrally with the interpolation member so as to fill the notch portion formed in the side surface of the blade portion facing the notch hole side is engaged with the engagement portion formed in the front surface plate, it is easy to determine the relative positions of the front surface plate, the impeller main body, and the interpolation member and to join them.
Drawings
Fig. 1 is a partially cut-away perspective view of an electric fluid pump of embodiment 1.
Fig. 2 is a perspective view of the centrifugal impeller.
Fig. 3 is an exploded perspective view of the centrifugal impeller.
Fig. 4 is an exploded perspective view of the centrifugal impeller of embodiment 2.
Description of the reference symbols
8: a fulcrum;
9A, 9B: a centrifugal impeller;
35A, 35B: an impeller body;
36A, 36B: an interpolation unit;
37A, 37B: a front surface plate;
38: a through hole;
39: a circular main board;
40: a hub;
41: a blade section;
41 a: a torsion portion;
42: cutting holes;
43: a circular auxiliary plate;
44: an interpolation unit;
44 a: a main board interpolation section;
44 b: a hub interpolation section;
50. 53: a boss portion;
51. 54: a card-holding section;
52: and a notch part.
Detailed Description
Embodiments of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1 to 3, a description will be given of embodiment 1 of the present invention, and first, in fig. 1, the electric fluid pump includes: a housing 7 having a pump chamber 6 therein; a support shaft 8 supported by the housing 7; a centrifugal impeller 9A rotatably supported by the support shaft 8 and housed in the pump chamber 6; a rotor 10 housed in the pump chamber 6 so as to rotate together with the centrifugal impeller 9A; and a stator 11 disposed outside the housing 7 so as to surround the rotor 10.
The housing 7 is composed of: a pump housing 13 having a suction cylinder portion 13b extending in the vertical direction so as to form a suction port 12 at an upper end of a central portion of the pump chamber 6, and a discharge cylinder portion 13c connected to an outer peripheral portion in the pump chamber 6 and extending in the tangential direction; and a tank-shaped housing member 14, wherein the pump chamber 6 is formed between the housing member 14 and the pump housing 13, and the housing member 14 is coupled to the pump housing 13.
The pump housing 13 is formed of synthetic resin, and integrally includes: a pump casing main portion 13a having a disk shape and opening downward; the suction cylinder portion 13b provided in connection with the upper end center portion of the pump housing main portion 13 a; the discharge tube portion 13c provided in connection with the outer periphery of the pump housing 13; and a 1 st flange portion 13d that extends radially outward from a lower end of the pump housing main portion 13a, wherein the 1 st flange portion 13d forms a step that lowers a portion located radially outward of the pump housing main portion 13a than a portion located radially inward of the pump housing main portion 13 a.
The case member 14 is formed of a synthetic resin, and integrally includes: a bottomed cylindrical portion 14a having an inner diameter smaller than the inner diameter of the pump housing main portion 13a and opened upward; and a 2 nd flange portion 14b which extends radially outward from an upper end portion of the bottomed cylindrical portion 14a, and is fitted in contact with the 1 st flange portion 13d from below.
The housing 7 is coupled to an intermediate housing member 15 and a cover member 16, and the cover member 16 and the housing 7 sandwich the intermediate housing member 15. The intermediate housing member 15 integrally has: a cylindrical case member main portion 15a that coaxially surrounds the bottomed cylindrical portion 14 a; a 3 rd flange portion 15b extending radially outward from an upper portion of the case member main portion 15 a; and a 4 th flange portion 15c that extends radially outward from a lower portion of the case member main portion 15a, wherein an upper portion of the case member main portion 15a and the 3 rd flange portion 15b are fitted to the 2 nd flange portion 14b so that the 3 rd flange portion 15b abuts against the 2 nd flange portion 14b from below, and the 1 st flange portion 13d and the 3 rd flange portion 15b are coupled to each other with the 2 nd flange portion 14b interposed therebetween.
The cover member 16 is integrally provided with: a cover member main portion 16a formed in a bottomed cylindrical shape with a closed lower end portion; and a 5 th flange portion 16b which extends radially outward from an upper end portion of the cover member main portion 16a, is joined to the 4 th flange portion 15c at a lower end portion of the intermediate housing member 15 from below, and has an annular seal member 17 interposed between the 4 th flange portion 15c and the 5 th flange portion 16 b.
The stator 11 is fixed to the outer surface of the bottomed cylindrical portion 14a of the case member 14, and the stator 11 is surrounded by the case member main portion 15a of the intermediate case member 15. A control circuit board 18 is housed and fixed in the cover member main portion 16a of the cover member 16.
One end portion located at the uppermost position of the support shaft 8 is held by a holding portion 20, and the holding portion 20 is provided in the pump housing 13 of the housing 7 and is disposed inside the suction port 12.
The holding portion 20 is disposed in a central portion of an end portion of the suction cylinder portion 13b on the pump chamber 6 side, has a fitting recess 21 that opens downward so that the one end portion of the support shaft 8 is fitted and fixed, and is integrally connected to an inner periphery of the end portion of the suction cylinder portion 13b on the pump chamber 6 side via a plurality of support arm portions 22 disposed at intervals in a circumferential direction. The housing member 14 integrally has a cylindrical support cylinder portion 14c extending upward from the lower end closed portion of the bottomed cylindrical portion 14a, and the other end portion of the support shaft 8 is fitted in the support cylinder portion 14 c.
The rotor 10 is composed of a rotor hub 24 and a bonded magnet 25 fixed to the rotor hub 24. The rotor hub 24 is formed by coaxially and integrally continuously providing: a cylindrical magnet support portion 24a coaxially surrounding the support cylindrical portion 14 c; and an extended cylindrical portion 24b formed to have a diameter smaller than that of the magnet support portion 24a, coaxially surrounding the support shaft 8, and extending upward from an upper end portion of the magnet support portion 24a, wherein the bonded magnet 25 is insert-molded around an outer periphery of the magnet support portion 24a, and the centrifugal impeller 9A is fixed to an upper portion of the extended cylindrical portion 24b by snap-fitting or the like.
The rotor 10 and the centrifugal impeller 9A fixed to the extended tube portion 24b of the rotor hub 24 are rotatably supported by the support shaft 8 via the 1 st and 2 nd slide bearings 30 and 31.
The 1 st sliding bearing 30 is press-fitted into the extended tube portion 24b so as to sandwich the washer 28 with the holding portion 20. The 2 nd slide bearing 31 is press-fitted into the extended cylindrical portion 24b so as to be spaced apart from the 1 st slide bearing 30 in the axial direction.
Referring also to fig. 2, the centrifugal impeller 9A is formed by joining an impeller main body 35A, and an interpolation member 36A and a front plate 37A that sandwich the impeller main body 35A from both sides in the axial direction of the support shaft 8, and the impeller main body 35A, the interpolation member 36A, and the front plate 37A are each made of resin.
Referring also to fig. 3, the impeller main body 35A is formed integrally with: a circular main plate 39 having a through hole 38 at a central portion thereof through which the support shaft 8 and the extended cylindrical portion 24b of the rotor 10 are inserted; a boss 40 formed in a cylindrical shape having a substantially frustoconical outer surface and coaxially connected to the through hole 38, and protruding from the circular main plate 39 to one axial side of the through hole 38 (to an upper side when the electric fluid pump is assembled); and a plurality of, for example, 5 blade portions 41 that have a twisted portion 41a at an end portion on the hub 40 side and protrude from the circular main plate 39 and the hub 40 to one side in the axial direction at positions that do not overlap with each other when viewed from a direction along the axis of the through-insertion hole 38.
Further, in the impeller main body 35A, a cut hole 42 including a shape of a projection of the blade 41 in a direction along the axis of the insertion hole 38 is formed independently corresponding to the blade 41. These cutout holes 42 are formed by cutting out a part of the hub 40 so as to include a connection portion between the twisted portion 41a of the blade 41 and the hub 40.
The interpolation member 36A includes an interpolation portion 44 that fills the cut hole 42 of the impeller main body 35A and smoothly connects the circular main plate 39, the hub 40, and the blade portion 41, and the interpolation member 36A is integrally provided with: a circular auxiliary plate 43 that abuts against the circular main plate 39 from the other axial side of the through hole 38; and the interpolation unit 44 protruding from the circular auxiliary plate 43. In the present embodiment, the circular auxiliary plate 43 is formed to have a slightly smaller outer diameter than the circular main plate 39. A cylindrical portion 39a is integrally provided on the outer periphery of the circular main plate 39, the cylindrical portion 39a covers the outer periphery of the circular auxiliary plate 43 in contact with the circular main plate 39, and a joint between the cylindrical portion 39a of the circular main plate 39 and the circular auxiliary plate 43 is exposed on the other side (lower side in a state of being assembled to the electric fluid pump) along the axis of the through hole 38.
The interpolation unit 44 is formed to include: a main plate interpolation portion 44a that fills a portion of the cutout hole 42 corresponding to the circular main plate 39; and a hub interpolation portion 44b filling a portion of the cutout hole 42 corresponding to the hub 40.
The front surface plate 37A abuts against the plurality of blade portions 41 of the impeller main body 35A from the side opposite to the interpolation member 36A, and the front surface plate 37A is integrally formed with: an annular plate portion 45; and a short cylindrical portion 46 that is connected to the inner periphery of the annular plate portion 45 and slightly protrudes on the side opposite to the impeller main body 35A, and an annular inlet portion that communicates with the suction port 12 of the housing 7 is formed between the short cylindrical portion 46 and the hub 40 of the impeller main body 35A and between the extension cylindrical portion 24b and the hub 40 inserted through the hub 40.
Further, the blade portions 41 of the impeller main body 35A are integrally provided with 1 st boss portions 50 protruding toward the front plate 37A, and the front plate 37A is provided with 1 st locking portions 51 with which the 1 st boss portions 50 are engaged. In the present embodiment, the 1 st locking portion 51 is formed as a recess, but may be a through hole.
In manufacturing such a centrifugal impeller 9A, the interpolation portion 44 is used to fill the cut-out hole 42 and the 1 st boss portion 50 is engaged with the 1 st locking portion 51, so that the 1 st boss portion 50 engaged with the 1 st locking portion 51 is welded to the front surface plate 37A and the circular main plate 39 of the impeller main body 35A and the outer peripheral portion of the circular auxiliary plate 43 of the interpolation member 36A are welded to each other in a state where the impeller main body 35A, the interpolation member 36A, and the front surface plate 37A are combined.
Next, to explain the operation of embodiment 1, the impeller main body 35A made of resin is integrally provided with: a circular main plate 39 having a through hole 38 at a central portion thereof; a boss 40 having an outer surface of a substantially truncated cone shape, formed in a cylindrical shape coaxially connected to the through-insertion hole 38, and protruding from the circular main plate 39 to one side in the axial direction of the through-insertion hole 38; and a plurality of blade portions 41 each having a twisted portion 41a twisted toward the hub 40 at an end portion on the hub 40 side and protruding from the circular main plate 39 and the hub 40 to one side in the axial direction at positions not overlapping with each other when viewed in the direction along the axis of the through-hole 38, wherein a cut hole 42 including a shape of a projection of the blade portion 41 in the direction along the axis of the through-hole 38 is formed in the impeller main body 35A, and a resin-made interpolation member 36A is joined to the impeller main body 35A from the other side along the axis of the through-hole 38, and wherein the interpolation member 36A has an interpolation portion 44 filling the cut hole 42 and smoothly connecting surfaces of the circular main plate 39, the hub 40, and the blade portion 41.
Therefore, even if the blade 41 has a three-dimensional shape having the twisted portion 41a, an undercut shape at the time of resin molding can be avoided, and a centrifugal impeller having the blade 41 with an efficient three-dimensional shape can be manufactured at low cost and in a thin shape by filling the cut hole 42 with the interpolation portion 44 of the interpolation member 36A made of resin. Further, since the die apparatus for molding such a centrifugal impeller does not require a slide core, a bending core, a drawing core, and the like, and a movable mechanism for driving them, the manufacturing cost is significantly reduced. Further, since the movable mechanism is not required, a plurality of cavities can be provided in a space having a margin, and a large number of parts of the centrifugal impeller can be manufactured at a time by using a so-called "multi-cavity resin molding die", a centrifugal impeller having a three-dimensional shape can be manufactured at low cost.
The interpolation unit 36A integrally includes: a circular auxiliary plate 43 that abuts against the circular main plate 39 from the other axial side of the through hole 38; and the interpolation unit 44 protruding from the circular auxiliary plate 43, wherein the interpolation unit 44 includes: a main plate interpolation portion 44a that fills a portion of the cutout hole 42 corresponding to the circular main plate 39; and a hub interpolation portion 44b filling a portion of the cutout hole 42 corresponding to the hub 40, so that a connection portion where the torsion portion 41a of the blade portion 41 is connected to the hub 40 can be prevented from being undercut.
Further, since the 1 st locking portion 51, which is provided integrally with the blade portions 41 and in which the 1 st boss portion 50 protruding toward the front surface plate 37A is engaged, is formed in the front surface plate 37A by abutting the resin front surface plate 37A against the plurality of blade portions 41 from the opposite side to the interpolation member 36A, the joining of the impeller main body 35A and the front surface plate 37A is facilitated.
Embodiment 2 of the present invention will be described with reference to fig. 4, and parts corresponding to embodiment 1 are given the same reference numerals and are only illustrated, and detailed description thereof will be omitted.
The centrifugal impeller 9B is formed by joining an impeller main body 35B, and an interpolation member 36B and a front surface plate 37B that sandwich the impeller main body 35B from both sides in the axial direction of the support shaft 8, and the impeller main body 35B, the interpolation member 36B, and the front surface plate 37B are each made of resin.
A cutout 52 is formed in each of side surfaces of the plurality of blade portions 41 of the impeller main body 35B facing the cutout hole 42, a circular auxiliary plate 43 of the interpolation member 36B and a plurality of 2 nd boss portions 53 connected to the interpolation portion 44 are integrally provided in the interpolation member 36B, and the 2 nd boss portions 53 protrude toward the front surface plate 37B so as to fill the cutout 52. On the other hand, the 2 nd locking portion 54 with which the 2 nd boss portion 53 is engaged is formed in the annular plate portion 45 of the front plate 37B, and in this embodiment, the 2 nd locking portion 54 is formed as a through hole, but may be formed as a recess.
In order to manufacture such a centrifugal impeller 9B, the cut-out hole 42 may be interpolated by the interpolation portion 44 of the interpolation member 36B, the cutout portion 52 may be filled in with the 2 nd boss portion 53, and the 2 nd boss portion 53 and the 2 nd locking portion 54 may be engaged with each other, so that the 2 nd boss portion 53 in a state of being engaged with the 2 nd locking portion 54 is welded to the front surface plate 37B in a state where the impeller main body 35B, the interpolation member 36B, and the front surface plate 37B are combined, and in addition, the outer peripheral portions of the circular main plate 39 of the impeller main body 35B and the circular auxiliary plate 43 of the interpolation member 36B may be welded to each other.
According to the 2 nd embodiment, the same effects as those of the 1 st embodiment can be obtained, and since the 2 nd boss portion 53 integrally provided on the interpolation member 36B is embedded in the notch portion 52 formed on the side surface of the blade portion 41 facing the cutout hole 42 and engaged with the 2 nd locking portion 54 formed on the front surface plate 37B, it is easy to define the relative positions of the front surface plate 37B, the impeller body 35B, and the interpolation member 36B and to join them.
In the embodiment, the circular auxiliary plate 43 is formed to have a slightly smaller outer diameter than the circular main plate 39, and the cylindrical portion 39a is integrally provided on the outer periphery of the circular main plate 39 so as to cover the outer periphery of the circular auxiliary plate 43 in contact with the circular main plate 39, but the present invention is not limited thereto, and the circular auxiliary plate 43 may be formed to have the same diameter as the circular main plate 39, and the cylindrical portion 39a may not be provided on the outer periphery of the circular main plate 39. In this case, the joint between the circular auxiliary plate 43 and the circular main plate 39 is exposed to the outer periphery of the centrifugal impellers 9A and 9B. That is, the contact direction of the welding tool (welding machine) when the circular auxiliary plate 43 is welded to the circular main plate 39 can be set on the peripheral surfaces of the centrifugal impellers 9A and 9B.
As still another embodiment of the present invention, the following parts may be formed together on the front surface plate: a 1 st locking portion 51 that engages with a 1 st boss portion 50 provided integrally with the blade portion 41 of the impeller main body; and a 2 nd locking portion 54 with which the 2 nd boss portion 53 integrally provided on the interpolation member is engaged.
While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various design changes can be made without departing from the present invention described in the claims.
Claims (1)
1. A centrifugal impeller is provided with:
a circular main plate (39) having a through hole (38) in the center thereof through which the support shaft (8) is inserted;
a hub (40) having an outer surface of a substantially truncated conical shape, formed in a cylindrical shape coaxially connected to the through-insertion hole (38), and protruding from the circular main plate (39) to one side in the axial direction of the through-insertion hole (38); and
a plurality of blade portions (41) that have a twisted portion (41a) at an end portion on the hub (40) side and that protrude from the circular main plate (39) and the hub (40) to one side in the axial direction at positions that do not overlap with each other when viewed from a direction along the axis of the through-insertion hole (38),
it is characterized in that the preparation method is characterized in that,
the circular main plate (39), the hub (40), and the blade portion (41) are integrally provided on a resin-made impeller main body (35A, 35B), a cutout hole (42) is formed in the impeller main body (35A, 35B), the shape of the cutout hole (42) includes a projection of the torsion portion (41a) on the blade portion (41) in a direction along an axis of a through hole (38), a resin-made interpolation member (36A, 36B) is joined to the impeller main body (35A, 35B) from the other side along the axis of the through hole (38), the interpolation member (36A, 36B) has an interpolation portion (44) that fills the cutout hole (42) and is smoothly connected to surfaces of the circular main plate (39), the hub (40), and the blade portion (41),
the interpolation means (36A, 36B) integrally includes: a circular auxiliary plate (43) that abuts the circular main plate (39) from the other axial side of the through hole (38); and the interpolation part (44) protruding from the circular auxiliary plate (43),
the interpolation unit (44) is formed to have: a main plate insertion section (44a) that fills a portion of the cutout hole (42) corresponding to the circular main plate (39); and a hub interpolation section (44b) that fills a portion of the cutout hole (42) corresponding to the hub (40),
a resin front surface plate (37B) is in contact with the blade sections (41) from the side opposite to the interpolation member (36B), a notch section (52) is formed on the side surface of the blade section (41) facing the cut hole (42), a locking section (54) is formed on the front surface plate (37B), a boss section (53) is engaged with the locking section (54), the boss section (53) is integrally provided on the main plate interpolation section (44a) of the interpolation member (36B), and the notch section (52) is smoothly filled and protrudes to the front surface plate (37B).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019054685A JP7185572B2 (en) | 2019-03-22 | 2019-03-22 | centrifugal impeller |
| JP2019-054685 | 2019-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111720360A CN111720360A (en) | 2020-09-29 |
| CN111720360B true CN111720360B (en) | 2022-06-24 |
Family
ID=72558164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010200590.8A Active CN111720360B (en) | 2019-03-22 | 2020-03-20 | Centrifugal impeller |
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| Country | Link |
|---|---|
| JP (1) | JP7185572B2 (en) |
| CN (1) | CN111720360B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5836876Y2 (en) * | 1979-05-17 | 1983-08-19 | 三菱電機株式会社 | centrifugal impeller |
| JPH0178287U (en) * | 1987-11-13 | 1989-05-25 | ||
| EP0694697A1 (en) * | 1994-07-30 | 1996-01-31 | Braun Aktiengesellschaft | Impeller for a radial fan |
| JP2005291116A (en) * | 2004-03-31 | 2005-10-20 | Yamada Seisakusho Co Ltd | Impeller for water pump |
| JP2010242543A (en) * | 2009-04-02 | 2010-10-28 | Panasonic Corp | Electric blower and electric vacuum cleaner using the same |
| CN108571465A (en) * | 2017-03-13 | 2018-09-25 | 日清纺精密机器株式会社 | Turbofan |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003336598A (en) * | 2002-05-17 | 2003-11-28 | Toshiba Tec Corp | Fan |
| WO2009065894A1 (en) | 2007-11-20 | 2009-05-28 | Mann+Hummel Gmbh | Compressor wheel of a centrifugal compressor and method for producing said compressor wheel |
| JP2010174718A (en) * | 2009-01-29 | 2010-08-12 | Panasonic Corp | Electric blower and vacuum cleaner using the same |
| US10584712B2 (en) | 2013-12-27 | 2020-03-10 | Honda Motor Co., Ltd. | Impeller |
| KR102289384B1 (en) * | 2014-12-18 | 2021-08-13 | 삼성전자주식회사 | Centrifugal fan assembly |
| CA2966053C (en) * | 2016-05-05 | 2022-10-18 | Tti (Macao Commercial Offshore) Limited | Mixed flow fan |
| DE102017128093A1 (en) | 2017-11-28 | 2019-05-29 | Miele & Cie. Kg | Impeller for use in a turbomachine |
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2019
- 2019-03-22 JP JP2019054685A patent/JP7185572B2/en active Active
-
2020
- 2020-03-20 CN CN202010200590.8A patent/CN111720360B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5836876Y2 (en) * | 1979-05-17 | 1983-08-19 | 三菱電機株式会社 | centrifugal impeller |
| JPH0178287U (en) * | 1987-11-13 | 1989-05-25 | ||
| EP0694697A1 (en) * | 1994-07-30 | 1996-01-31 | Braun Aktiengesellschaft | Impeller for a radial fan |
| JP2005291116A (en) * | 2004-03-31 | 2005-10-20 | Yamada Seisakusho Co Ltd | Impeller for water pump |
| JP2010242543A (en) * | 2009-04-02 | 2010-10-28 | Panasonic Corp | Electric blower and electric vacuum cleaner using the same |
| CN108571465A (en) * | 2017-03-13 | 2018-09-25 | 日清纺精密机器株式会社 | Turbofan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7185572B2 (en) | 2022-12-07 |
| JP2020153342A (en) | 2020-09-24 |
| CN111720360A (en) | 2020-09-29 |
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