JP2018178795A - Turbo fan - Google Patents

Turbo fan Download PDF

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Publication number
JP2018178795A
JP2018178795A JP2017076504A JP2017076504A JP2018178795A JP 2018178795 A JP2018178795 A JP 2018178795A JP 2017076504 A JP2017076504 A JP 2017076504A JP 2017076504 A JP2017076504 A JP 2017076504A JP 2018178795 A JP2018178795 A JP 2018178795A
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Prior art keywords
welding
shroud
main plate
blade
turbo fan
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JP2017076504A
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JP6899245B2 (en
Inventor
岩井　晴義
Haruyoshi Iwai
晴義 岩井
竜也 礒部
Tatsuya Isobe
竜也 礒部
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Nisshinbo Mechatronics Inc
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Nisshinbo Mechatronics Inc
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Priority to JP2017076504A priority Critical patent/JP6899245B2/en
Priority to KR1020180004882A priority patent/KR20180113905A/en
Priority to CN201810226980.5A priority patent/CN108691804B/en
Publication of JP2018178795A publication Critical patent/JP2018178795A/en
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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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • 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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/44—Resins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a turbo fan which improves a welding strength according to ultrasonic welding as compared to the conventional turbo fan.SOLUTION: A turbo fan 10 is fabricated by separately molding a main plate 12 or a shroud 131 provided with a plurality of welding fitting parts 124 and blade members 134 of the same number with the plurality of welding fitting parts with thermoplastic resin and integrating the main plate or shroud and the blade members according to ultrasonic welding. Therein, the welding fitting parts are provided with a wall part vertically provided so as to surround a circumference of the blade members fitted to the welding fitting part and, further, an inclination part provided on a bottom part inner lateral surface, and the blade members are fitted to the welding fitting parts and are ultrasonic-welded to the main plate or shroud while being brought into contact with the inclination part.SELECTED DRAWING: Figure 1

Description

本発明は、空気調和機に搭載される熱可塑性樹脂にて成形されるターボファンに係り、これまで以上に溶着強度の向上を図ったターボファンに関するものである。   The present invention relates to a turbofan molded of a thermoplastic resin mounted on an air conditioner, and more particularly to a turbofan intended to improve welding strength more than ever.

従来のターボファンは、以下の３つの方法で製造されている。
一つ目は、主板と複数の翼とが一体となったファン本体と、シュラウドとを熱可塑性樹脂にて別々に成形し、超音波溶着等で接合する方法である。
二つ目は、シュラウドの裏側に複数の翼が一体となったファン本体と、主板とを熱可塑性樹脂にて別々に成形し、超音波溶着等で接合する方法である。
三つ目は、主板、シュラウド及び複数の翼とを熱可塑性樹脂にて別々に成形し、超音波溶着等で接合する方法である。 Conventional turbofans are manufactured in the following three ways.
The first method is a method in which a fan main body in which a main plate and a plurality of wings are integrated and a shroud are separately formed of thermoplastic resin and joined by ultrasonic welding or the like.
The second is a method in which a fan main body in which a plurality of blades are integrated on the back side of the shroud and a main plate are separately formed of thermoplastic resin and joined by ultrasonic welding or the like.
The third is a method in which the main plate, the shroud and the plurality of wings are separately formed of thermoplastic resin and joined by ultrasonic welding or the like.

各方法ともに、主板またはシュラウドに羽根部材との嵌合部が設けられている。その嵌合部内に溶着エッジが設けられていて、接合する部材がその溶着エッジと接触し加圧力を加えながら超音波振動を加えると溶着エッジが溶融し二つの部材が接合される。   In each method, the main plate or the shroud is provided with a fitting portion with the blade member. A welding edge is provided in the fitting portion, and when ultrasonic vibration is applied while a member to be joined is in contact with the welding edge and a pressure is applied, the welding edge is melted and the two members are joined.

ターボファンの性能向上のためには、ターボファンの構成部材である主板、シュラウド及び羽根部材の接合後の寸法を確保しつつ、接合強度を向上させる必要がある。従来品について図９により説明する。従来品のターボファンは、主板９２の嵌合部９２４にシュラウドの羽根部９３４を嵌め込み仮組して超音波溶着により製造される。仮組の状態では羽根部９３４は、嵌合部９２４の壁部９２５にて位置決めされており、またその底部９３４Ｂは溶着エッジ９２６と接触している。溶着エッジ９２６は、その断面は略三角形状をなし、嵌合部９２４の底部に１列ないし２列設けていた。このような溶着エッジの配置の仕方では、超音波溶着に際して互いの部材の接合強度を向上させるための溶着長を長くすることには限界があり、ターボファンの性能向上に伴う溶着強度向上の要求を満たすことができないという問題があった。   In order to improve the performance of the turbofan, it is necessary to improve the joint strength while securing the dimensions after joining of the main plate, the shroud, and the blade members, which are constituent members of the turbofan. The conventional product will be described with reference to FIG. The conventional turbo fan is manufactured by ultrasonic welding, in which a blade portion 934 of a shroud is inserted into a fitting portion 924 of a main plate 92 and temporarily assembled. In the temporary assembled state, the blade 934 is positioned at the wall 925 of the fitting 924, and its bottom 934B is in contact with the welding edge 926. The welding edge 926 has a substantially triangular cross section, and one or two rows are provided at the bottom of the fitting portion 924. In such a method of arranging the welding edge, there is a limit to increasing the welding length for improving the joint strength of the members in ultrasonic welding, and there is a demand for the improvement of the welding strength accompanying the improvement of the performance of the turbo fan There was a problem that it could not meet.

本発明は、上記の事情に鑑みてなされたものであり、従来のターボファンに比べ超音波溶着による溶着強度を向上させたターボファンを提供することを目的としている。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a turbofan in which welding strength by ultrasonic welding is improved as compared with a conventional turbofan.

上記課題を解決するための第1発明のターボファンは、以下の特徴を有する。
複数の溶着嵌合部を備えた主板またはシュラウドと、前記複数の溶着嵌合部と同数の羽根部材を熱可塑性樹脂で別々に成形し、主板またはシュラウドと羽根部材を超音波溶着にて一体化したターボファンであって、
前記溶着嵌合部は、溶着嵌合部に嵌め込まれる羽根部材の周囲を囲むように立設した壁部を備え、さらに底部内側面には傾斜部を備え、
前記羽根部材は、前記溶着嵌合部に嵌め込み、前記傾斜部と接触した状態で主板またはシュラウドと超音波溶着した。 A turbo fan according to a first aspect of the present invention for solving the above-mentioned problems has the following features.
A main plate or shroud having a plurality of welded fitting portions, and blade members of the same number as the plurality of welded fitting portions are separately formed of thermoplastic resin, and the main plate or shroud and the blade members are integrated by ultrasonic welding. A turbo fan who
The welding fitting portion includes a wall portion erected so as to surround the periphery of a blade member fitted to the welding fitting portion, and further includes an inclined portion on the bottom inner side surface,
The blade member was fitted into the welding fitting portion and ultrasonically welded to the main plate or the shroud in a state of being in contact with the inclined portion.

第１発明のターボファンによれば、以下の効果が発現する。
羽根部材は、主板またはシュラウドの溶着嵌合部に嵌め込まれて超音波溶着により接合される。溶着嵌合部は、羽根部材の周囲を囲むように立設した壁部を有する構成であり、羽根部材は精度よく位置決めされる。また溶着嵌合部の底部の内側面には羽根部材の角部を周回するように傾斜部が設けられている。羽根部材の底面の角部は、全周に亘この溶着嵌合部内の傾斜部と接触している。羽根部材の角部は、鋭く尖った形状となっているので、羽根部材の角部に溶着エッジがその全周に亘り存在することになる。このため羽根部材は、溶着嵌合部の傾斜部と全周に亘り溶着されることになる。従って従来よりも溶着長は長くなり溶着強度は格段に向上する。 According to the turbo fan of the first invention, the following effects are exhibited.
The blade members are fitted into the welding fitting portion of the main plate or the shroud and joined by ultrasonic welding. The welding fitting portion is configured to have a wall portion erected so as to surround the periphery of the blade member, and the blade member is accurately positioned. In addition, an inclined portion is provided on the inner side surface of the bottom portion of the welding fitting portion so as to go around the corner portion of the blade member. The corner of the bottom surface of the blade member is in contact with the inclined portion in the welded fitting portion all around. Since the corner of the blade member has a sharp pointed shape, a welding edge is present at the corner of the blade member over the entire circumference thereof. For this reason, the blade members are welded along the entire circumference with the inclined portion of the welding fitting portion. Therefore, the welding length is longer than in the prior art, and the welding strength is significantly improved.

第２発明のターボファンは、第1発明において以下の特徴を有する。
前記溶着嵌合部の底部には、前記羽根部材と接触する帯状の凸部を設けた。 The turbofan of the second invention has the following features in the first invention.
The bottom of the welding fitting portion is provided with a belt-like convex portion in contact with the blade member.

第2発明のターボファンによれば、羽根部材が溶着嵌合部の傾斜部と溶着される際に溶着が進行すると羽根部材の底部が帯状の凸部と接触し、過度に溶着が進行することを防止するとともに、ターボファンの最終寸法を確保することができる。   According to the turbo fan of the second aspect of the invention, when welding progresses when the blade member is welded to the inclined portion of the welding fitting portion, the bottom portion of the blade member contacts the strip-like convex portion, and welding progresses excessively. To ensure the final dimensions of the turbofan.

第３発明のターボファンは、第1発明または第2発明において以下の特徴を有する。
前記溶着嵌合部の底部と溶着後の前記羽根部材との間には、空間を設けた。 The turbofan of the third invention has the following features in the first invention or the second invention.
A space was provided between the bottom of the welded fitting portion and the blade member after welding.

第３発明のターボファンによれば、以下の効果が発現する。
溶着嵌合部の底部と溶着される羽根部材との間には空間が設けられている。この空間は、溶着時に過度に溶融した樹脂の逃げ場として機能する。溶着時に溶融しすぎた樹脂がその空間内に収容され、溶着部分の溶着を阻害することが無くなる。従って、ターボファンの最終寸法を確保することが容易になると共に本来の溶着強度を安定して確保することができる。 According to the turbo fan of the third aspect of the invention, the following effects appear.
A space is provided between the bottom of the weld fitting portion and the blade member to be welded. This space functions as an escape place for the excessively melted resin at the time of welding. The resin which has been excessively melted at the time of welding is accommodated in the space, and the welding of the welded portion is not inhibited. Therefore, the final dimensions of the turbofan can be easily secured, and the original welding strength can be stably secured.

本発明の実施形態のターボファンの主板、及び羽根付シュラウドの組立時のセット状態を示す斜視図。BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the set state at the time of the assembly of the main plate of the turbo fan of embodiment of this invention, and a bladed shroud. 本実施形態のターボファンの完成した状態を示す斜視図。The perspective view which shows the completed state of the turbo fan of this embodiment. 本実施形態のターボファンの主板の全体概略図（斜視図）。BRIEF DESCRIPTION OF THE DRAWINGS The whole schematic (perspective view) of the main plate of the turbo fan of this embodiment. 本実施形態のターボファンの主板の全体概略図（平面図）。FIG. 2 is an overall schematic view (plan view) of a main plate of the turbofan of the present embodiment. 本実施形態のターボファンの主板に設けた溶着嵌合部の説明図。Explanatory drawing of the welding fitting part provided in the main plate of the turbo fan of this embodiment. 図５の溶着嵌合部の部分拡大図。The elements on larger scale of the welding fitting part of FIG. 本実施形態のターボファンを超音波溶着する前後の状態の説明図。Explanatory drawing of the state before and behind ultrasonically welding the turbo fan of this embodiment. 本実施形態のターボファンの超音波溶着部の拡大図。The enlarged view of the ultrasonic welding part of the turbo fan of this embodiment. 従来のターボファンを溶着する際の溶着エッジの形態の説明図。Explanatory drawing of the form of the welding edge at the time of welding the conventional turbo fan.

本発明のターボファンについて図１から図８により説明する。   The turbo fan of the present invention will be described with reference to FIGS. 1 to 8.

図１は本発明の実施形態のターボファンの主板、及び羽根付シュラウドの組立時のセット状態を示す斜視図、図２は本実施形態のターボファンの完成した状態を示す斜視図、図３は本実施形態のターボファンの主板の全体概略図（斜視図）、図４は本実施形態のターボファンの主板の全体概略図（平面図）、図５は本実施形態のターボファンの主板に設けた溶着嵌合部の説明図、図６は図５の溶着嵌合部の部分拡大図、図７（ａ）は本実施形態のターボファンを超音波溶着する前の状態の説明図であり、図７（ｂ）は超音波溶着後の状態の説明図、図８は本実施形態のターボファンの超音波溶着部の拡大図である。   FIG. 1 is a perspective view showing a set state of a main plate of a turbofan according to an embodiment of the present invention and a shroud with a blade, FIG. 2 is a perspective view showing a completed state of the turbofan according to the present embodiment, FIG. The overall schematic view (perspective view) of the main plate of the turbofan of the present embodiment, FIG. 4 is the overall schematic view (plan view) of the main plate of the turbofan of the present embodiment, and FIG. 5 is provided on the main plate of the turbofan of the present embodiment 6 is a partial enlarged view of the welded fitting portion of FIG. 5, and FIG. 7 (a) is an explanatory diagram of a state before ultrasonic welding of the turbo fan of the present embodiment, FIG. 7 (b) is an explanatory view of a state after ultrasonic welding, and FIG. 8 is an enlarged view of an ultrasonic weld of the turbofan of this embodiment.

これまでターボファンは各部材を熱可塑性樹脂により個別で成形し超音波溶着により組立接合（溶着）して製造されている。溶着後のターボファンの溶着強度を向上させるための各部材の構成及び構造について、シュラウドに羽根部材（以下、羽根部と称する）が一体成形された羽根付シュラウドと主板とを超音波溶着により接合したターボファンで説明する。尚本発明は、本実施形態に限定されることなく適用可能である。   Until now, turbofans have been manufactured by individually forming each member of thermoplastic resin and assembling (welding) by ultrasonic welding. About the composition and structure of each member for improving the welding strength of the turbo fan after welding, a bladed shroud integrally formed with a blade member (hereinafter referred to as a blade portion) is joined to a main plate by ultrasonic welding. It explains with the turbo fan which The present invention is applicable without being limited to the present embodiment.

図１は、ターボファン１０を構成する円板状の主板１２、羽根付シュラウド１３をセットする状態を示している。図２は、本実施形態のターボファン１０の完成状態である。羽根付シュラウド１３は、ファンの吸込導風路を形成するシュラウド１３１に主板１２と接続する複数の羽根部１３４を有する。各部品は、熱可塑性樹脂を用いて個別に射出成形される。羽根付シュラウド１３の羽根部１３４は、主板１２の周辺部に複数個所設けた溶着嵌合部１２４に嵌め込んで組立て接合される。各部品は、超音波溶着により接合される。尚羽根部１３４の構造は、＜３＞にて後述するが、図１に示すように、風を押し出す正圧面とその反対面である負圧面を有する。本実施形態の説明では、羽根部１３４はその頂部から底部に亘り同一形状（ストレート）である場合について説明する。尚羽根部１３４の形状は、ターボファンの送風特性を実現するために、正圧面と負圧面は所要の曲面形状を呈した形状のものでも良い。   FIG. 1 shows a state in which a disk-shaped main plate 12 and a bladed shroud 13 constituting a turbo fan 10 are set. FIG. 2 is a completed state of the turbo fan 10 of the present embodiment. The bladed shroud 13 has a plurality of vanes 134 connected to the main plate 12 at a shroud 131 that forms a suction air guide path of the fan. Each part is injection molded separately using a thermoplastic resin. The blade portion 134 of the bladed shroud 13 is fitted and welded to a welding fitting portion 124 provided at a plurality of locations around the main plate 12. Each part is joined by ultrasonic welding. In addition, although the structure of the blade part 134 is mentioned later by <3>, as shown in FIG. 1, it has a negative pressure surface which is the positive pressure surface which pushes out wind, and its opposite surface. In the description of this embodiment, a case where the blade portion 134 has the same shape (straight) from the top to the bottom will be described. The shape of the blade portion 134 may be such that the pressure surface and the suction surface have a required curved shape in order to realize the air flow characteristic of the turbo fan.

＜１＞主板の構造
主板１２は、図１から図４に示すように、その中央部にモータを覆うように形成された凸形状のハブ１２２と、ハブ１２２の中心部にモータのシャフトが高さ方向（図１と図２の上下方向）に挿入されて固定されるボス１２１とを有している。また主板１２の周縁部には、図３及び図４に示すように、羽根付シュラウド１３と組立接合する際に羽根部１３４を嵌め込む溶着嵌合部１２４が羽根付シュラウド１３の羽根部１３４の個数分設けられている。 <1> Structure of Main Plate As shown in FIGS. 1 to 4, the main plate 12 has a convex hub 122 formed so as to cover the motor at its central portion, and a high motor shaft at the central portion of the hub 122 A boss 121 is inserted and fixed in the longitudinal direction (vertical direction in FIGS. 1 and 2). Further, as shown in FIGS. 3 and 4, a welding fitting portion 124 into which the blade portion 134 is fitted when assembling and joining to the bladed shroud 13 is provided at the peripheral portion of the main plate 12 of the blade portion 134 of the bladed shroud 13. It is provided for the number.

溶着嵌合部１２４は、図５及び図６のように構成されている。所定高さ及び厚さを有して主板１２上に立設し周回するように形成した壁部１２５、傾斜面１２８及び帯状の凸部１２９により構成されている。傾斜面１２８は、溶着嵌合部１２４の内側面の底部に周回するように設けられている。また帯状の凸部１２９は、溶着嵌合部の底部に設けられており、その上面は平坦状である。尚この帯状の凸部１２９は、本実施形態では１つの溶着嵌合部１２４に１つ帯状に設けられているが、形状を円形等として複数個設ける構成でも良い。図１に示す羽根付シュラウド１３の羽根部１３４がこの溶着嵌合部１２４に嵌込まれる。羽根部１３４の底部１３４Ｂは平坦な形状である。この溶着嵌合部１２４に羽根部１３４が嵌めこまれると、この羽根部１３４の底部１３４Ｂの周縁部（角部）１３４Ｃが、主板１２の溶着嵌合部１２４に設けられた傾斜面１２８と全周接触した状態となる。   The welding fitting portion 124 is configured as shown in FIGS. 5 and 6. It has a wall portion 125, an inclined surface 128, and a strip-like convex portion 129 which are formed so as to stand on the main plate 12 and have a predetermined height and thickness. The inclined surface 128 is provided so as to go around the bottom of the inner surface of the welding fitting portion 124. Further, the belt-like convex portion 129 is provided at the bottom of the welding fitting portion, and the upper surface thereof is flat. In the present embodiment, one belt-like convex portion 129 is provided in a band shape in one welding fitting portion 124, but a plurality of belt-like convex portions 129 may be provided in a circular shape or the like. The blade portion 134 of the bladed shroud 13 shown in FIG. 1 is fitted into the welded fitting portion 124. The bottom portion 134B of the blade portion 134 is flat. When the blade portion 134 is fitted into the welding fitting portion 124, the peripheral portion (corner portion) 134C of the bottom portion 134B of the blade portion 134 is completely combined with the inclined surface 128 provided on the welding fitting portion 124 of the main plate 12. It will be in the state of circumferential contact.

図７（ａ）は、主板１２と羽根部１３４が超音波溶着により接合される直前の状態である。溶着終了後は、図７（ｂ）に示すように溶着嵌合部１２４に嵌め込まれた羽根部１３４の底部１３４Ｂがこの帯状の凸部１２９上の平坦部と接触し、超音波溶着時の加圧力を受けても安定した姿勢で各羽根部１３４が主板１２に溶着接合し図８の状態となる。   FIG. 7A shows a state immediately before the main plate 12 and the blade portion 134 are joined by ultrasonic welding. After welding, as shown in FIG. 7 (b), the bottom 134B of the blade 134 fitted in the welding fitting portion 124 contacts the flat portion on the band-like convex portion 129, and ultrasonic welding is performed. Each blade portion 134 is welded and joined to the main plate 12 in a stable posture even under pressure, resulting in the state shown in FIG.

＜２＞羽根付シュラウドの構造
羽根付シュラウド１３を図１により説明する。羽根付シュラウド１３は、シュラウド１３１と羽根部１３４により構成されている。図１に示すように、中央部には大きな開口部１３２を有している。周辺部１３３は、外周方向に略傾斜面を呈している。また周辺部１３３には、羽根部１３４を主板１２に嵌合させる溶着嵌合部１２４（図１参照）と同数備えている。 <2> Structure of shroud with blade The shroud 13 with a blade will be described with reference to FIG. The bladed shroud 13 is configured of a shroud 131 and a blade portion 134. As shown in FIG. 1, the central portion has a large opening 132. The peripheral portion 133 exhibits a substantially inclined surface in the outer peripheral direction. Further, the peripheral portion 133 is provided with the same number as the welding fitting portions 124 (see FIG. 1) for fitting the blade portions 134 to the main plate 12.

＜３＞羽根部の構造
羽根付シュラウド１３の各羽根部１３４の溶着嵌合部１２４と嵌り込む部分の底部１３４Ｂの周縁部は、図７に示すように尖ったエッジ状の角部になっている。この角部１３４Ｃが羽根付シュラウドと主板を溶着する場合の溶着エッジの機能を果たす。また羽根部１３４の形状は、図１に示すように、風を押し出す正圧面とその反対面がその頂部から底部に亘り同一形状（ストレート）である。羽根部１３４は、複数枚あるので、ターボファンを軽量化するために、ブロー成形等の方法により空洞化することもできる。 <3> Structure of blade portion The peripheral portion of the bottom portion 134B of the portion fitted with the welded fitting portion 124 of each blade portion 134 of the bladed shroud 13 becomes a sharp edge-shaped corner as shown in FIG. There is. The corner portion 134C functions as a welding edge when welding the bladed shroud and the main plate. Further, as shown in FIG. 1, the shape of the vane portion 134 is the same shape (straight) from the top to the bottom of the pressure surface for pushing out the wind and the opposite surface thereof. Since there are a plurality of blades 134, they can be hollowed by a method such as blow molding in order to reduce the weight of the turbo fan.

＜４＞ターボファンの組立接合
上記のように構成された、主板１２、羽根付シュラウド１３を図１に示すように、主板１２の溶着嵌合部１２４に羽根付シュラウド１３の羽根部１３４を嵌め込み仮組する。このように仮組されたものを、以下ワークと称する。この際、図７（ａ）に示すように、主板１２の各溶着嵌合部１２４の傾斜面１２８に各羽根部１３４の角部１３４Ｃが全周接触した状態となる。図７（ａ）に示すように羽根付シュラウド１３の羽根部１３４の底部１３４Ｂの角部１３４Ｃは、尖ったエッジ状となっている。この角部１３４Ｃが溶着嵌合部１２４の内側面の底部に周回するように設けられた傾斜面１２８と全周接触している。また羽根部１３４の側面１３４Ｓは溶着嵌合部の壁部１２５にガイドされて位置決めされているので超音波溶着する前のワークは安定的姿勢を確保することができる。 <4> Assembling and Joining of Turbo Fan As shown in FIG. 1, the main plate 12 and the vaned shroud 13 configured as described above are fitted with the vane portion 134 of the vaned shroud 13 in the weld fitting portion 124 of the main plate 12. Make a temporary assembly. Those temporarily assembled in this manner are hereinafter referred to as work. Under the present circumstances, as shown to Fig.7 (a), it will be in the state which the corner part 134C of each blade part 134 contacted all the circumferences on the inclined surface 128 of each welding fitting part 124 of the main plate 12. FIG. As shown in FIG. 7A, the corner 134C of the bottom 134B of the blade 134 of the bladed shroud 13 has a sharp edge. The corner portion 134C is in full circumferential contact with the inclined surface 128 provided so as to be circulated at the bottom of the inner side surface of the welding fitting portion 124. Further, since the side surface 134S of the wing portion 134 is guided and positioned by the wall portion 125 of the welding fitting portion, the workpiece before ultrasonic welding can secure a stable posture.

このように仮組されたワークを超音波溶着機の治具上に載置する。ワークの羽根付シュラウド１３の所定位置を超音波溶着機のホーンで接触加圧すると、溶着エッジに相当する羽根部１３４の角部１３４Ｃが溶着嵌合部の傾斜面１２８の部分と溶融接合し図７（ｂ）の状態となり、ワークは一体化される。ワークを超音波溶着機の治具上に載置する方法は、図１に示すように主板１２を治具上にセットしても良いし、反転して羽根付シュラウドを治具上にセットしても良い。   The work temporarily assembled in this manner is placed on the jig of the ultrasonic welding machine. Contact pressure of the specified position of the bladed shroud 13 of the work by the horn of the ultrasonic welding machine, the corner 134C of the blade 134 corresponding to the welding edge melts and joins with the inclined surface 128 of the welding fitting part In the state of 7 (b), the work is integrated. As a method of placing the work on the jig of the ultrasonic welding machine, the main plate 12 may be set on the jig as shown in FIG. 1, or it may be reversed to set the bladed shroud on the jig. It is good.

さらに超音波溶着加工の過程を図８に説明する。溶着嵌合部１２４の傾斜面１２８（図７参照）と接触している羽根部１３４の角部１３４Ｃが溶着エッジの機能を果たし、角部１３４Ｃと傾斜面１２８の接触部が溶融し、羽根部の底部１３４Ｂは下降し帯状の凸部１２９と接触し、角部１３４Ｃは溶着部Ｍとなる。   Further, the process of ultrasonic welding will be described with reference to FIG. The corner 134C of the blade 134 in contact with the inclined surface 128 (see FIG. 7) of the weld fitting part 124 functions as a welding edge, and the contact between the corner 134C and the inclined surface 128 melts, and the blade The bottom portion 134B of the lower portion descends and contacts the strip-like convex portion 129, and the corner portion 134C becomes a welded portion M.

さらに溶着嵌合部の底部に設けられた帯状の凸部１２９の周りには空間１２６が設けられている。溶着の過程で溶融した樹脂のうち、羽根部１３４の角部１３４Ｃと傾斜面１２８との接合に関与しない溶融樹脂Ｎは、その下部にある空間１２６内に溜め込まれる。従って過度に溶融した樹脂が溶着を阻害し溶着強度を低下させたり、溶着後の寸法がバラツクという問題は皆無となる。   Furthermore, a space 126 is provided around a strip-like convex portion 129 provided at the bottom of the welding fitting portion. Among the resins melted in the process of welding, the molten resin N not involved in the bonding between the corner portion 134C of the blade portion 134 and the inclined surface 128 is stored in the space 126 in the lower portion. Therefore, the excessively melted resin inhibits welding and lowers the welding strength, and the problem that the dimensions after welding are inconsistent is completely eliminated.

このように本発明によれば、以下の効果が発現する。溶着が過度に進行することがなくなり、溶着後のターボファンの規定の製品寸法が確保される。更に溶着長が従来の図９に示した溶着エッジで溶着した従来品に比べて格段に長くなるので溶着強度も格段に向上する。また溶着嵌合部１２４内の帯状の凸部１２９の作用により、羽根付シュラウド１３の羽根部１３４と主板１２が、各部材が位置ズレすることなく安定的な姿勢で均一に超音波溶着される。このようにして得られたターボファンの性能は従来品に比べ格段に向上する。   Thus, according to the present invention, the following effects appear. The welding does not progress excessively, and the product size of the turbofan after welding is secured. Furthermore, since the welding length is significantly longer than that of the conventional product welded at the welding edge shown in FIG. 9 of the prior art, the welding strength is also significantly improved. Further, due to the action of the belt-like convex portion 129 in the welding fitting portion 124, the blade portion 134 of the bladed shroud 13 and the main plate 12 are ultrasonically welded uniformly in a stable posture without the respective members being displaced. . The performance of the turbofan obtained in this manner is significantly improved as compared with the conventional product.

１０ ターボファン
１２ 主板
１２１ ボス
１２２ ハブ
１２４ 溶着嵌合部
１２５ 壁部
１２６ 空間
１２８ 傾斜面
１２９ 帯状の凸部
１３ 羽根付シュラウド
１３１ シュラウド
１３２ 開口部
１３３ 周辺部
１３４ 羽根部
１３４Ｂ 底部
１３４Ｃ 角部
１３４Ｓ 側部
Ｍ 溶着部
Ｎ 溶融樹脂
９２ 主板（従来品）
９２４ 嵌合部（従来品）
９２５ 壁部（従来品）
９２６ 溶着エッジ（従来品）
９３４ 羽根部（従来品）
９３４Ｂ 羽根部の底部（従来品） DESCRIPTION OF REFERENCE NUMERALS 10 turbo fan 12 main plate 121 boss 122 hub 124 welded fitting portion 125 wall portion 126 space 128 inclined surface 129 band-like convex portion 13 bladed shroud 131 shroud 132 opening portion 133 peripheral portion 134 blade portion 134B bottom portion 134C corner portion 134S side portion M weld N molten resin 92 main plate (conventional product)
924 Fitting part (conventional product)
925 wall (conventional product)
926 Welding edge (conventional product)
934 Blade part (conventional product)
934B Bottom of blade (conventional product)

Claims (3)

複数の溶着嵌合部を備えた主板またはシュラウドと、前記複数の溶着嵌合部と同数の羽根部材を熱可塑性樹脂で別々に成形し、主板またはシュラウドと羽根部材を超音波溶着にて一体化したターボファンであって、
前記溶着嵌合部は、溶着嵌合部に嵌め込まれる羽根部材の周囲を囲むように立設した壁部を備え、さらに底部内側面には傾斜部を備え、
前記羽根部材は、前記溶着嵌合部に嵌め込み、前記傾斜部と接触した状態で主板またはシュラウドと超音波溶着した
ことを特徴とするターボファン。 A main plate or shroud having a plurality of welded fitting portions, and blade members of the same number as the plurality of welded fitting portions are separately formed of thermoplastic resin, and the main plate or shroud and the blade members are integrated by ultrasonic welding. A turbo fan who
The welding fitting portion includes a wall portion erected so as to surround the periphery of a blade member fitted to the welding fitting portion, and further includes an inclined portion on the bottom inner side surface,
The turbo fan, wherein the blade member is fitted into the welding fitting portion and ultrasonically welded to the main plate or the shroud in a state of being in contact with the inclined portion. 前記溶着嵌合部の底部には、前記羽根部材と接触する帯状の凸部を設けたことを特徴とする請求項１に記載のターボファン。   The turbo fan according to claim 1, wherein a belt-like convex portion in contact with the blade member is provided at a bottom portion of the welding fitting portion. 前記溶着嵌合部の底部と溶着後の前記羽根部材との間には、空間を設けたことを特徴とする請求項１または請求項２に記載のターボファン。   The turbo fan according to claim 1, wherein a space is provided between a bottom portion of the welding fitting portion and the blade member after welding.
JP2017076504A 2017-04-07 2017-04-07 Turbofan Active JP6899245B2 (en)

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CN201810226980.5A CN108691804B (en) 2017-04-07 2018-03-19 Turbine fan

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