WO2017126398A1 - Rouet en résine - Google Patents

Rouet en résine Download PDF

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Publication number
WO2017126398A1
WO2017126398A1 PCT/JP2017/000734 JP2017000734W WO2017126398A1 WO 2017126398 A1 WO2017126398 A1 WO 2017126398A1 JP 2017000734 W JP2017000734 W JP 2017000734W WO 2017126398 A1 WO2017126398 A1 WO 2017126398A1
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WO
WIPO (PCT)
Prior art keywords
axis
blade
blades
impeller
shaft portion
Prior art date
Application number
PCT/JP2017/000734
Other languages
English (en)
Japanese (ja)
Inventor
山口　哲雄
晋一郎 岡本
Original Assignee
株式会社エンプラス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社エンプラス filed Critical 株式会社エンプラス
Publication of WO2017126398A1 publication Critical patent/WO2017126398A1/fr

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Classifications

    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0034—Mould parting lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers

Definitions

  • This invention relates to a resin impeller that allows a fluid that flows in along an axial direction to flow out radially outward.
  • the resin impeller is an injection molded product that is injected from the mold cavity after the molten resin is injected into the mold cavity and the molten resin injected into the mold cavity is cooled and solidified.
  • FIG. 7 is a view showing an injection mold 101 of such an impeller 100.
  • FIG. 7A is a plan view of the second mold 103 shown with the first mold 102 removed.
  • FIG. 7B is a longitudinal sectional view of the injection mold 101.
  • the injection mold 101 of the impeller 100 has a cavity 105 formed on the mold mating surface 104 side of the first mold 102 and the second mold 103, and a plurality of medium frames are formed in the cavity 105.
  • the blades 106 are arranged so as to be slidable, and the blades 107 are formed by the molten resin flowing into the gaps between the middle pieces 106.
  • each middle piece 106 is slid outward in the radial direction of the impeller 100 and separated from the impeller 100, The impeller 100 and the second mold 103 can be separated (see Patent Document 1).
  • the impeller 100 shown in FIG. 7A has an arc shape in which the blades 107 are curved in one direction, the efficiency and the output (fluid flow rate per unit time) for converting rotational energy into fluid kinetic energy are improved. Etc.) and the improvement cannot be achieved at the same time.
  • an object of the present invention is to provide a resin impeller that can improve both efficiency and output.
  • the present invention has a central shaft portion 3 and a plurality of blades 5 formed at equal intervals around the central shaft portion 3, and rotates about the axis CL of the central shaft portion 3. Resin made to flow out the fluid flowing in between the blades 5 and 5 adjacent to each other from the direction along the axis CL of the shaft 3 toward the radially outward side perpendicular to the axis CL of the center shaft 3 This relates to the impeller 1.
  • the blade 5 is formed in a spiral shape from the one end 7 side along the axis CL of the central shaft portion 3 toward the other end 8 side.
  • the blade 5 is formed on the radially outer end side so that the amount of deformation in the rotational direction side gradually increases toward the radially outward direction perpendicular to the axis CL of the central shaft portion 3.
  • a second flow modifying portion 12 formed so that the amount of deformation in the opposite direction side gradually increases.
  • the first flow modifying portion of the blade enables the output to be improved, and the second flow modifying portion of the blade enables the efficiency to be improved. can do.
  • FIG. 1 (a) is a top view of resin-made impeller
  • FIG.1 (b) is a front view of resin-made impeller
  • FIG.1 (c) is resin-made. It is a reverse view of an impeller.
  • 2A is a cross-sectional view showing a simplified basic shape of a blade of the resin impeller according to the embodiment of the present invention
  • FIG. 2B is a simplified view of the shape of the blade of the resin impeller shown in FIG.
  • FIG. 2C is a cross-sectional view showing a simplified shape of the auxiliary blades of the resin impeller shown in FIG.
  • FIG. 1 (a) is a top view of resin-made impeller
  • FIG.1 (b) is a front view of resin-made impeller
  • FIG.1 (c) is resin-made.
  • 2A is a cross-sectional view showing a simplified basic shape of a blade of the resin impeller according to the embodiment of the present invention
  • FIG. 2B is a simplified view of the
  • FIG. 3A is a view showing the shape of the upper end face (end face on one end along the axis of the central shaft portion) of the blade shown in FIG. 2A
  • FIG. FIG. 6 is a diagram (a diagram showing a degree of twisting of the blade) showing a positional relationship between an upper end surface and a lower end surface (an end surface on the other end side along the axis of the central shaft portion). It is a figure (figure which shows the twist state of a wing
  • FIG. 5A is a cross-sectional view of the injection mold in the first molding step of the resin impeller
  • FIG. 5B is a cross-sectional view of the injection mold in the second molding step of the resin impeller.
  • FIG. 6A is a cross-sectional view of the injection mold in the third molding step of the resin impeller
  • FIG. 6B is a cross-sectional view of the injection mold showing the step of taking out the resin impeller.
  • Fig.7 (a) is the 2nd metal mold
  • FIG.7 (b) is an injection mold.
  • FIG.7 (a) is the 2nd metal mold
  • FIG.7 (b) is an injection mold.
  • FIG.7 (a) is the 2nd metal mold
  • FIG. 1 is a view showing a resinous impeller 1 (hereinafter abbreviated as an impeller 1) according to an embodiment of the present invention.
  • FIG. 1A is a plan view of the impeller 1.
  • FIG. 1B is a front view of the impeller 1.
  • FIG. 1C is a rear view of the impeller 1.
  • an impeller 1 As shown in FIG. 1, an impeller 1 according to the present embodiment has a cylindrical central shaft portion 3 in which a shaft hole 2 is formed, and a substantially tapered shape integrally formed on the outer peripheral side of the central shaft portion 3. A plurality of blades 5 formed so as to straddle the outer peripheral surface 3a of the central shaft portion 3 and the outer surface 4a of the blade support portion 4 and to be positioned at equal intervals around the central shaft portion 3; And auxiliary blades 6 formed on the outer surface 4a of the blade support 4 between the adjacent blades 5 and 5 (see FIG. 2).
  • Such an impeller 1 is injection-molded using a synthetic resin material such as carbon fiber-containing PEEK and carbon fiber-containing PPS.
  • the blade 5 is formed in a spiral shape with a constant twist angle ( ⁇ ) from the one end 7 side along the axis CL of the central shaft portion 3 toward the other end 8 side (see FIGS. 3 and 4).
  • ⁇ a constant twist angle
  • the impeller 1 is rotated counterclockwise (counterclockwise) as shown in FIG. 1A
  • the twisted direction of the blade 5 is the one end 7 side along the axis CL of the central shaft portion 3.
  • 4 shows the height position of the blade 5 (positions Z 0 to Z n in the direction along the axial center CL of the central shaft portion 3) and the position (r 0 to r n of the radially outer end of the blade 5).
  • a diagram showing a twisted state of the blade 5 shows that the blade 5 is formed with a constant twist angle ⁇ .
  • FIG. 2A and FIG. 3A are diagrams showing the basic shape of the blade 5 of the impeller 1 in a simplified manner, and are cross-sectional views of the impeller 1.
  • the blades 5 are formed in a thin plate shape and extend from the outer peripheral surface 3a of the central shaft portion 3 toward the radially outward side perpendicular to the axis CL of the central shaft portion 3, The radially outer end coincides with the radially outer end of the blade support portion 4.
  • the blade 5 is formed with an unmodified shape portion 10 extending linearly along the radial direction from a radially inner end to a portion near the radially outer end.
  • the blade 5 is smoothly connected to the radially outer end of the unshaped portion 10 on the radially outer end side, and the amount of deformation of the impeller 1 toward the rotational direction gradually increases toward the radially outer side.
  • the first flow modifying portion 11 formed so as to be smoothly connected to the radially outer end of the first flow modifying portion 11 and toward the direction opposite to the rotational direction of the impeller 1 toward the radially outer side.
  • a second flow modifying portion 12 formed so that the amount of deformation gradually increases is formed.
  • the connecting portion 13 between the first flow modifying portion 11 and the second flow modifying portion 12 has a curved shape that is convex toward the rotation direction of the impeller 1, and the fluid flowing through the first flow modifying portion 11 is the first.
  • the two-flow modifying unit 12 can be smoothly guided.
  • the radial direction outer end of the 2nd flow modification part 12 is a radial direction outer end of the blade
  • the height dimension of the blade 5 in FIG. 4 (h), in FIG. 2 (a), the from end Z 0 of the blade 5 along the axis CL of the center shaft 3 to the other end Z n of the blades 5 It is a length dimension along the axis CL.
  • FIG. 2B is a diagram showing the shape of the blade 5 of the impeller 1 shown in FIG. 1 in a simplified manner, and is a cross-sectional view of the impeller 1.
  • the blade 5 of the impeller 1 shown in FIG. 2 (b) has an axial center on the radially outer end side of the blade 5 shown in FIG. 2 (a) in order to accommodate the impeller 1 in a case of a centrifugal compressor or the like.
  • the one end 7 side along the CL is cut into a substantially 1/4 elliptical shape.
  • FIG. 2 (c) is a simplified view of the shape of the auxiliary blade 6 of the impeller 1 shown in FIG. 1, and is a cross-sectional view of the impeller 1.
  • the auxiliary blade 6 of the impeller 1 shown in FIG. 2C has a shape in which 60% of the height dimension h is cut out from one end 7 along the axis CL of the blade 5 shown in FIG. 5 in which the fluid inflow side is cut out).
  • the blade support 4 of the impeller 1 connects a plurality of blades 5 and forms the bottom surface of the flow path between adjacent blades 5, 5. It is a plate-like body formed with a wall thickness dimension similar to the wall thickness dimension of the shaft portion 3.
  • the outer surface 4a of the blade support portion 4 is configured so that the fluid flowing between the adjacent blades 5 and 5 from the direction along the axial center CL of the central shaft portion 3 is radially outwardly orthogonal to the axial center CL of the central shaft portion 3. It has a curved surface that smoothly guides toward the side.
  • a thinned portion 14 having a substantially triangular cross section along the axis CL of the central shaft portion 3 is formed. .
  • an injection mold 20 includes a fixed mold 21, a movable mold 22, and a cavity piece arranged between the fixed mold 21 and the movable mold 22. 23.
  • the injection mold 20 has an internal space of the cavity piece 23 when the mold is clamped by sandwiching the cavity piece 23 between the fixed side mold 21 and the movable side mold 22.
  • a cavity 24 for forming the impeller 1 is formed.
  • the cavity piece 23 includes a support piece portion 25 and an intermediate piece portion 27 that is rotatably supported by the support piece portion 25 via a bearing 26.
  • the injection molding method of the impeller 1 is, for example, the one end 7 side along the axis CL of the impeller 1 from the large diameter portion side located on the other end 8 side along the axis CL of the impeller 1.
  • the filling efficiency into the cavity 24 is improved.
  • the gate 28 of the injection mold 20 is disposed on the small diameter portion side on the one end 7 side along the axis CL of the impeller 1, the gate 28 is positioned on the other end 8 side along the axis CL of the impeller 1.
  • the holding pressure can be sufficiently applied to the ends of the large-diameter portion blade 5 and the auxiliary blade 6.
  • the cavity piece 23 and the movable mold 22 are integrated to form the fixed mold 21.
  • the impeller 1 in the cavity 24 (resin solidified in the cavity 24) and the resin in the gate 28 are separated (second molding step). Then, the cavity piece 23 and the movable side mold 22 move integrally from the mold clamping position in FIG. 5A to the first mold release position in FIG. 5B.
  • the impeller 1 made of a resin material cooled and solidified in the cavity 24 has a contraction rate larger than that of the metal cavity piece 23 and the movable side mold 22, so that the blade 5 and the auxiliary blade 6 are formed. Therefore, a gap is generated between the spiral groove 30 of the intermediate piece portion 27 and the blade 5 and the auxiliary blade 6, and the blade support portion 4 tightens the shaft portion 31 and the truncated cone portion 32 of the movable mold 22. Further, in this second molding step, the impeller 1 has the blades 5 and the auxiliary blades 6 formed by the spiral grooves 30 of the intermediate piece portion 27, and the mold dividing surface as in the conventional example is not located on the surface. No burr occurs.
  • the movable side mold 22 is separated from the cavity piece 23 and the second mold is released.
  • the blade support portion 4 of the impeller 1 is movable while the shaft mold portion 31 and the truncated cone shape portion 32 of the movable mold 22 are tightened. It moves together with the mold 22, and the spiral blade 5 and the auxiliary blade 6 of the impeller 1 slide in the spiral groove 30 of the middle piece portion 27 (see FIGS. 5B and 6A).
  • the impeller 1 according to the present embodiment achieves both improvement in efficiency (efficiency for converting the rotational energy of the impeller 1 into fluid kinetic energy) and output (fluid flow rate per unit time, etc.). Can do.
  • the blades 5 and the auxiliary blades 6 are formed with a constant twist angle ⁇ , and the spiral blades 5 and the auxiliary blades 6 are formed in the spiral groove 30 of the middle piece portion 27. Since the inner frame portion 27 of the cavity piece 23 is relatively rotated, the middle piece portion 27 of the cavity piece 23 is relatively moved in the direction along the axis CL of the central shaft portion 3. Therefore, the cavity piece 23 can be smoothly separated from the middle piece portion 27. As a result, the impeller 1 according to the present embodiment can form the blade 5 and the auxiliary blade 6 with the spiral groove 30 (part of the cavity 24) carved in the middle piece portion 27.
  • the conventional impeller 100 shown in FIG. 7 has mold dividing surfaces (divided surfaces) 108 a to 108 c between the middle pieces 106 and the first mold 102 of the blade 107. Since it is located on the surface, burrs are likely to occur along the surface ridgeline of each blade 107.
  • the conventional impeller 100 shown in FIG. 7 has a problem that burrs generated on the surfaces of the blades 107 are removed by secondary processing such as polishing, which increases the manufacturing cost. .
  • the impeller 1 according to the present embodiment can solve such problems of the conventional impeller 100.
  • the impeller 1 according to the present invention is not limited to the impeller 1 of the above-described embodiment, and can slide in the spiral groove 30 of the middle piece 27 in a state where the blade 5 and the auxiliary blade 6 are elastically deformed. As long as the blade 6 is smoothly separated from the middle piece 27 while rotating the middle piece 27, the twist angle is changed from one end 7 side along the axis CL of the central shaft portion 3 toward the other end 8 side. May be.
  • the impeller 1 according to the present invention is not limited to the impeller 1 of the above-described embodiment, and the height (h1) of the auxiliary blade 6 is set to an optimum size according to the maximum diameter of the blade 5 and the required output performance. Can be determined.
  • the impeller 1 according to the present invention is not limited to the impeller 1 of the above embodiment, and the auxiliary blade 6 may be omitted if the performance required only by the blade 5 can be exhibited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

[Problème] L'invention a pour objet de réaliser un rouet en résine capable d'apporter à la fois une amélioration du rendement et une amélioration de la production. [Solution] Le présent rouet en résine est doté d'une partie 3 d'arbre central et d'une pluralité d'aubes 5 formées à intervalles égaux autour de ladite partie 3 d'arbre central, la rotation autour d'un axe CL de la partie 3 d'arbre central faisant en sorte qu'un fluide s'écoulant entre des aubes 5 adjacentes en provenance d'une direction suivant l'axe CL de la partie 3 d'arbre central s'écoule vers l'extérieur en direction du côté extérieur de la partie 3 d'arbre central dans une direction radiale orthogonale à l'axe CL. Les aubes 5 sont formées en spirale à partir d'un côté d'extrémité en direction d'un autre côté d'extrémité suivant l'axe CL de la partie 3 d'arbre central. Au niveau de côtés d'extrémités extérieures des aubes 5 dans la direction radiale se trouvent: une première section 11 de redressement d'écoulement formée de telle façon qu'une amplitude de déformation vers un côté du sens de rotation augmente progressivement en direction de l'extérieur de la partie 3 d'arbre central dans la direction radiale orthogonale à l'axe CL; et une deuxième section 12 de redressement d'écoulement qui est raccordée sans discontinuité à l'extrémité extérieure de la première section 11 de redressement d'écoulement dans la direction radiale et est formée de telle façon que l'amplitude de déformation vers un côté opposé au sens de rotation augmente progressivement en direction de l'extérieur de la partie 3 d'arbre central dans la direction radiale orthogonale à l'axe CL.
PCT/JP2017/000734 2016-01-18 2017-01-12 Rouet en résine WO2017126398A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016006893A JP2017129015A (ja) 2016-01-18 2016-01-18 樹脂製インペラ
JP2016-006893 2016-01-18

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WO2017126398A1 true WO2017126398A1 (fr) 2017-07-27

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PCT/JP2017/000734 WO2017126398A1 (fr) 2016-01-18 2017-01-12 Rouet en résine

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7037273B2 (ja) * 2016-10-12 2022-03-16 株式会社エンプラス 射出成形インペラ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124206A (en) * 1976-04-12 1977-10-19 Sundstrand Corp Compressor wheels and blanks therefor
JPH0219895U (fr) * 1988-07-22 1990-02-09
JP2001082383A (ja) * 1999-09-09 2001-03-27 Sowa Denki Seisakusho:Kk 羽根車、遠心送風機および遠心ポンプ
JP2007009831A (ja) * 2005-07-01 2007-01-18 Matsushita Electric Ind Co Ltd インペラ及びそれを備えた送風ファン

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0178287U (fr) * 1987-11-13 1989-05-25
JP5215962B2 (ja) * 2009-08-31 2013-06-19 本田技研工業株式会社 遠心式冷却ファンの騒音防止構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124206A (en) * 1976-04-12 1977-10-19 Sundstrand Corp Compressor wheels and blanks therefor
JPH0219895U (fr) * 1988-07-22 1990-02-09
JP2001082383A (ja) * 1999-09-09 2001-03-27 Sowa Denki Seisakusho:Kk 羽根車、遠心送風機および遠心ポンプ
JP2007009831A (ja) * 2005-07-01 2007-01-18 Matsushita Electric Ind Co Ltd インペラ及びそれを備えた送風ファン

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