JP2017160875A - Method for manufacturing impeller - Google Patents
Method for manufacturing impeller Download PDFInfo
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- JP2017160875A JP2017160875A JP2016047477A JP2016047477A JP2017160875A JP 2017160875 A JP2017160875 A JP 2017160875A JP 2016047477 A JP2016047477 A JP 2016047477A JP 2016047477 A JP2016047477 A JP 2016047477A JP 2017160875 A JP2017160875 A JP 2017160875A
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- impeller
- side plate
- blade
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- main plate
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 43
- 238000003754 machining Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 239000005871 repellent Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 238000007778 shielded metal arc welding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
本発明は、羽根車の製造方法に関する。 The present invention relates to a method for manufacturing an impeller.
これまで、ポンプに使用される羽根車は鋳造により一体的に製造されている（例えば、特許文献１参照）。 Until now, the impeller used for a pump is integrally manufactured by casting (for example, refer patent document 1).
従来、羽根車は鋳造により一体的に製造されるため、羽根車内の流路表面を加工することが難しかった。また、鋳造では同じ型を用いたとしても、湯の冷え方が一様ではないので、羽根車の寸法にばらつきが生じる。このため、流路形状にばらつきが生じ、ポンプの性能がばらつくという問題があった。また鋳造困難な高強度材料（例えば、ステンレスなど）を使用することができず、機械的な強度を向上させることが難しいという問題があった。 Conventionally, since the impeller is integrally manufactured by casting, it has been difficult to process the flow path surface in the impeller. Further, even if the same mold is used for casting, since the cooling method of the hot water is not uniform, the dimensions of the impeller vary. For this reason, there has been a problem that the flow path shape varies and the performance of the pump varies. In addition, it is difficult to use a high-strength material (for example, stainless steel) that is difficult to cast, and it is difficult to improve mechanical strength.
本発明は、上記問題に鑑みてなされたものであり、羽根車内の流路表面の加工を容易化し且つ流路形状のばらつきを低減し且つ機械的な強度を向上させることを可能とする羽根車の製造方法を提供することを目的とする。 The present invention has been made in view of the above problems, and an impeller that facilitates processing of the surface of the flow path in the impeller, reduces variations in the flow path shape, and improves mechanical strength. It aims at providing the manufacturing method of.
本発明の第１の態様に係る羽根車の製造方法は、主板の表面を削り出し加工して複数の羽根を形成する工程と、側板の表面に前記羽根の形状に合わせた溝を形成する工程と、前記溝の水平位置と前記羽根の水平位置が略一致するように、前記側板を前記主板の上に配置する工程と、前記側板と前記羽根との溶接を実行して、前記主板と前記側板を一体化する工程と、を有する。 The impeller manufacturing method according to the first aspect of the present invention includes a step of machining a surface of a main plate to form a plurality of blades, and a step of forming a groove in accordance with the shape of the blades on the surface of a side plate. And a step of placing the side plate on the main plate so that a horizontal position of the groove and a horizontal position of the blade substantially coincide with each other, and welding the side plate and the blade, And integrating the side plates.
この構成により、羽根または主板の表面を加工することが容易であるので、羽根車内の流路表面の加工を容易化する。主板の表面を削り出し加工して複数の羽根を形成するので、羽根の寸法のばらつきを低減することができ、流路形状のばらつきを低減することができる。主板及び側板にステンレスなどの高強度材料を用いることができるので、機械的な強度を向上させることができる。このように、羽根車内の流路表面の加工を容易化し且つ流路形状のばらつきを低減し且つ機械的な強度を向上させることができる。 With this configuration, since it is easy to process the surface of the blade or the main plate, processing of the surface of the flow path in the impeller is facilitated. Since the surface of the main plate is machined to form a plurality of blades, variations in blade dimensions can be reduced, and variations in flow path shape can be reduced. Since a high-strength material such as stainless steel can be used for the main plate and the side plate, the mechanical strength can be improved. Thus, the processing of the surface of the flow path in the impeller can be facilitated, the variation in the flow path shape can be reduced, and the mechanical strength can be improved.
本発明の第２の態様に係る羽根車の製造方法は、第１の態様に係る羽根車の製造方法であって、前記溶接は、Ａ−ＴＩＧ溶接である。 The manufacturing method of the impeller which concerns on the 2nd aspect of this invention is a manufacturing method of the impeller which concerns on a 1st aspect, Comprising: The said welding is A-TIG welding.
この構成により、通常のＴＩＧ溶接に比べて、倍以上の深溶込みが可能である。 With this configuration, deep penetration can be more than doubled compared to normal TIG welding.
本発明の第３の態様に係る羽根車の製造方法は、第１の態様に係る羽根車の製造方法であって、前記主板と前記側板を一体化する工程における前記溶接の実行は、Ａ−ＴＩＧ溶接を実行し、その後にＭＡＧ溶接あるいは被覆アーク溶接を実行することである。 The impeller manufacturing method according to the third aspect of the present invention is the impeller manufacturing method according to the first aspect, wherein the welding is performed in the step of integrating the main plate and the side plate. Performing TIG welding followed by MAG welding or covered arc welding.
この構成により、主板と側板をより強固に一体化することができる。 With this configuration, the main plate and the side plate can be more firmly integrated.
本発明の第４の態様に係る羽根車の製造方法は、第１から３のいずれかの態様に係る羽根車の製造方法であって、前記側板を前記主板の上に配置する工程の前に、前記羽根及び／または前記主板の表面を研磨する工程を更に有する。 An impeller manufacturing method according to a fourth aspect of the present invention is an impeller manufacturing method according to any one of the first to third aspects, wherein the side plate is placed on the main plate before the step. The method further comprises a step of polishing the surface of the blade and / or the main plate.
この構成により、羽根車内の流路が滑らかになるので、羽根車の仕事効率が向上する。 With this configuration, since the flow path in the impeller becomes smooth, the work efficiency of the impeller is improved.
本発明の第５の態様に係る羽根車の製造方法は、第１から４のいずれかの態様に係る羽根車の製造方法であって、前記一体化する工程の後に、前記側板の表面を旋削する工程を更に有する。 An impeller manufacturing method according to a fifth aspect of the present invention is the impeller manufacturing method according to any one of the first to fourth aspects, wherein the surface of the side plate is turned after the integrating step. The method further includes the step of:
この構成により、羽根車の表面の凹凸をなくすとともに、羽根車の重量を低減することができる。 With this configuration, the unevenness of the surface of the impeller can be eliminated, and the weight of the impeller can be reduced.
本発明によれば、羽根または主板の表面を加工することが容易であるので、羽根車内の流路表面の加工を容易化する。主板の表面を削り出し加工して複数の羽根を形成するので、羽根の寸法のばらつきを低減することができ、流路形状のばらつきを低減することができる。主板及び側板にステンレスなどの高強度材料を用いることができるので、機械的な強度を向上させることができる。このように、羽根車内の流路表面の加工を容易化し且つ流路形状のばらつきを低減し且つ機械的な強度を向上させることができる。 According to the present invention, since it is easy to process the surface of the blade or the main plate, the processing of the surface of the flow path in the impeller is facilitated. Since the surface of the main plate is machined to form a plurality of blades, variations in blade dimensions can be reduced, and variations in flow path shape can be reduced. Since a high-strength material such as stainless steel can be used for the main plate and the side plate, the mechanical strength can be improved. Thus, the processing of the surface of the flow path in the impeller can be facilitated, the variation in the flow path shape can be reduced, and the mechanical strength can be improved.
以下、各実施形態について、図面を参照しながら説明する。図１は、本実施形態に係る羽根車１の斜視図である。図１に示すように、羽根車１は、シャフトが通る穴Ｈが形成されており、穴の周りに水が流入する流入口ＩＮが形成されている。羽根車１は、主板２と側板３と、主板２と側板３の間に設けられた複数の羽根２１とを備える。羽根車１の側面には水が吐き出される吐出口ＯＵＴが形成されている。 Each embodiment will be described below with reference to the drawings. FIG. 1 is a perspective view of an impeller 1 according to the present embodiment. As shown in FIG. 1, the impeller 1 has a hole H through which a shaft passes, and an inlet IN through which water flows is formed around the hole. The impeller 1 includes a main plate 2 and a side plate 3, and a plurality of blades 21 provided between the main plate 2 and the side plate 3. A discharge port OUT through which water is discharged is formed on the side surface of the impeller 1.
図２〜図７を参照しつつ、図８を用いて本実施形態に係る羽根車１の製造方法について説明する。図２は、主板２における羽根２１の削り出しと側板３の溝加工を説明するための図である。図３は、羽根２１の表面の加工を説明するための図である。図４は、側板３を主板２に上に配置する工程と側板３と羽根２１の溶接工程を説明するための図である。図５は、側板３と羽根２１の溶接前後の羽根車１の一部断面図である。図６は、通常のＴＩＧ（Tungsten Inert Gas）溶接と本実施形態に係るＡ−ＴＩＧ（Active Elements on Weld Formation using TIG）溶接との違いを説明するための図である。図７は、旋削加工工程を説明するための図である。図８は、本実施形態に係る羽根車１の製造の流れの一例を示すフローチャートである。 A manufacturing method of the impeller 1 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a view for explaining the cutting of the blades 21 and the groove processing of the side plate 3 in the main plate 2. FIG. 3 is a diagram for explaining the processing of the surface of the blade 21. FIG. 4 is a view for explaining a process of arranging the side plate 3 on the main plate 2 and a welding process of the side plate 3 and the blade 21. FIG. 5 is a partial cross-sectional view of the impeller 1 before and after welding the side plate 3 and the blades 21. FIG. 6 is a diagram for explaining a difference between normal TIG (Tungsten Inert Gas) welding and A-TIG (Active Elements on Weld Formation using TIG) welding according to the present embodiment. FIG. 7 is a diagram for explaining a turning process. FIG. 8 is a flowchart showing an example of the manufacturing flow of the impeller 1 according to the present embodiment.
（ステップＳ１０１）まず、図２（Ｃ）及び（Ｄ）に示すように、主板２の表面を削り出し加工して複数の羽根２１を形成する。 (Step S101) First, as shown in FIGS. 2C and 2D, the surface of the main plate 2 is cut out to form a plurality of blades 21.
（ステップＳ１０２）また、ステップＳ１０１と並行して、図２（Ａ）及び（Ｂ）に示すように、側板３の表面に羽根２１の形状に合わせた溝３１を形成する。なお、本実施形態に係る溝３１は、側板３を貫通していない。なお、溝３１は、側板３を一部あるいは全部貫通してもよい。 (Step S102) In parallel with Step S101, as shown in FIGS. 2A and 2B, a groove 31 matching the shape of the blade 21 is formed on the surface of the side plate 3. Note that the groove 31 according to the present embodiment does not penetrate the side plate 3. The groove 31 may penetrate part or all of the side plate 3.
（ステップＳ１０３）ステップＳ１０１の後に、羽根２１及び／または主板２の表面を研磨する。これにより、羽根車１内の流路が滑らかになるので、羽根車１の仕事効率が向上する。 (Step S103) After step S101, the surfaces of the blades 21 and / or the main plate 2 are polished. Thereby, since the flow path in the impeller 1 becomes smooth, the work efficiency of the impeller 1 is improved.
（ステップＳ１０４）図３に示すように、羽根２１の負圧側の表面２１Ｎを親水性に加工する。この構成により、流れの剥離により水の流れが逆流する剥離領域が形成されるのを防止することができるので、羽根車１の仕事効率の低下を防止することができる。ここで、親水性の加工は例えば、親水性の塗料の塗布、あるいは羽根の負圧側の表面に凹凸を設けることなどである。これにより、羽根２１の負圧側の表面２１Ｎを親水性にすることができるので、流れの剥離により水の流れが逆流する剥離領域が形成されるのを防止することができる。
また、羽根２１の正圧側の表面２１Ｐを撥水性に加工する。撥水性の加工は例えば、撥水性の塗料の塗布などである。この構成により、羽根２１によって押し出される水の切れが良くなるので、羽根車１の仕事効率を向上させることができる。
(Step S104) As shown in FIG. 3, the surface 21N on the negative pressure side of the blade 21 is processed to be hydrophilic. With this configuration, it is possible to prevent a separation region where the flow of water flows backward due to the separation of the flow, and thus it is possible to prevent a reduction in work efficiency of the impeller 1. Here, the hydrophilic processing is, for example, application of a hydrophilic paint or provision of irregularities on the surface of the blade on the negative pressure side. Thereby, since the surface 21N on the negative pressure side of the blade 21 can be made hydrophilic, it is possible to prevent the formation of a separation region where the flow of water flows backward due to the separation of the flow.
Further, the surface 21P on the positive pressure side of the blade 21 is processed to be water repellent. The water-repellent processing is, for example, application of a water-repellent paint. With this configuration, the water that is pushed out by the blades 21 is improved, so that the work efficiency of the impeller 1 can be improved.
なお、本実施形態では、一例として羽根２１の負圧側の表面２１Ｎに親水性の加工、羽根２１の正圧側の表面２１Ｐに撥水性の加工をしたが、これに限らず、羽根２１の負圧側の表面２１Ｎに親水性の加工だけしてもよいし、羽根２１の正圧側の表面２１Ｐに撥水性の加工だけしてもよい。すなわち、複数の羽根２１の負圧側の表面２１Ｎに親水性の加工をし、且つ／または複数の羽根２１の正圧側の表面２１Ｐに撥水性の加工をしてもよい。これにより、また、防錆、耐食性あるいは各種機能性の塗料を羽根２１の表面に塗布してもよい。 In this embodiment, as an example, hydrophilic processing is performed on the surface 21N on the negative pressure side of the blade 21 and water repellency processing is performed on the surface 21P on the positive pressure side of the blade 21. The surface 21N of the blade 21 may be subjected only to hydrophilic processing, or the surface 21P on the positive pressure side of the blade 21 may be subjected to water repellency processing only. That is, hydrophilic processing may be performed on the surface 21N on the negative pressure side of the plurality of blades 21, and / or water repellent processing may be performed on the surface 21P on the positive pressure side of the plurality of blades 21. Thereby, you may apply | coat the antirust, corrosion resistance, or various functional coating material to the surface of the blade | wing 21 again.
（ステップＳ１０５）次に、図４の主側板フィッティングに示すように、溝３１の水平位置と羽根２１の水平位置が略一致するように、側板３を主板２の上に配置する。 (Step S105) Next, as shown in the main side plate fitting in FIG. 4, the side plate 3 is arranged on the main plate 2 so that the horizontal position of the groove 31 and the horizontal position of the blades 21 substantially coincide.
（ステップＳ１０６）次に、図４の主側板の一体化溶接に示すように、側板３と羽根２１との溶接を実行して、主板２と側板３を一体化する。本実施形態に係る溶接は、Ａ−ＴＩＧ溶接である。ここでＡ−ＴＩＧ溶接は、ＴｉＯ2やＣｒ2Ｏ3などの酸化物を主体とした粉末状の活性フラックス（active flux：溶接促進剤）をメチルエチルケトンやアセトン等の揮発性溶媒で溶いて刷毛により母材表面に予め塗布し、ティグ溶接を行う溶接プロセスである。 (Step S106) Next, as shown in the integrated welding of the main side plate in FIG. 4, the side plate 3 and the blade 21 are welded to integrate the main plate 2 and the side plate 3. The welding according to the present embodiment is A-TIG welding. Here, A-TIG welding is performed by dissolving a powdery active flux (active flux: welding accelerator) mainly composed of oxides such as TiO 2 and Cr 2 O 3 with a volatile solvent such as methyl ethyl ketone and acetone. This is a welding process in which the surface of the base material is applied in advance and TIG welding is performed.
具体的には、図５（Ａ）に示すように、溶接の前に活性フラックス（例えば、Ｃｒ2Ｏ3、ＴｉＯ2などの酸化物）ＦＲを、側板３に形成された溝３１に塗布する。そして図５（Ｂ）に示すようにＴＩＧ溶接を施す。筐体３５に保持された電極３４から放出されたアーク放電３３により、アーク放電３３を熱源として、側板３と不図示の溶加棒を溶融して、側板３と羽根２１をする。図５（Ｂ）に示すように、溶融池３２の裏波３２１が側板の裏面に形成される。 Specifically, as shown in FIG. 5A, an active flux (for example, an oxide such as Cr 2 O 3 or TiO 2 ) FR is applied to the groove 31 formed in the side plate 3 before welding. . Then, TIG welding is performed as shown in FIG. The arc discharge 33 emitted from the electrode 34 held by the housing 35 melts the side plate 3 and a filler rod (not shown) using the arc discharge 33 as a heat source to form the side plate 3 and the blade 21. As shown in FIG. 5B, a back wave 321 of the molten pool 32 is formed on the back surface of the side plate.
図６（Ａ）に示すように通常のＴＩＧ溶接では、溶融金属が外向きに対流するのに対し、図６（Ｂ）に示すようにＡ−ＴＩＧ溶接では、溶融金属が内向きに対流する。これにより、Ａ−ＴＩＧ溶接は、通常のＴＩＧ溶接に比べて、倍以上の深溶込みが可能である。 In normal TIG welding as shown in FIG. 6 (A), molten metal convects outward, whereas in A-TIG welding, molten metal convects inward as shown in FIG. 6 (B). . Thereby, A-TIG welding can deep-penetrate twice or more compared with normal TIG welding.
なお、Ａ−ＴＩＧ溶接を実行し、その後に残りに部分についてＭＡＧ（Metal Active Gas welding）溶接あるいは被覆アーク溶接（SMAW（Shielded Metal Arc Welding）、手棒溶接ともいう）を実行して、主板２と側板３を一体化してもよい。これにより、主板２と側板３をより強固に一体化することができる。 In addition, A-TIG welding is performed, and then the remaining part is subjected to MAG (Metal Active Gas welding) welding or covering arc welding (also referred to as SMAW (Shielded Metal Arc Welding), hand bar welding). And the side plate 3 may be integrated. Thereby, the main plate 2 and the side plate 3 can be integrated more firmly.
（ステップＳ１０７）次に、図７に示すように側板３の表面を旋削する。これにより、羽根車１の表面の凹凸をなくすとともに、羽根車１の重量を低減することができる。 (Step S107) Next, the surface of the side plate 3 is turned as shown in FIG. Thereby, the unevenness | corrugation of the surface of the impeller 1 can be eliminated, and the weight of the impeller 1 can be reduced.
以上、本実施形態に係る羽根車の製造方法は、主板２の表面を削り出し加工して複数の羽根２１を形成する工程と、側板３の表面に羽根２１の形状に合わせた溝３１を形成する工程と、溝３１の水平位置と羽根２１の水平位置が略一致するように、側板３を主板２の上に配置する工程と、側板３と羽根２１との溶接を実行して、主板２と側板３を一体化する工程と、を有する。 As mentioned above, the manufacturing method of the impeller which concerns on this embodiment forms the groove | channel 31 matched with the shape of the blade | wing 21 on the surface of the side plate 3, and the process which cuts out the surface of the main plate 2, and forms the several blade | wing 21 Performing the step of arranging the side plate 3 on the main plate 2 so that the horizontal position of the groove 31 and the horizontal position of the blade 21 substantially coincide, and welding the side plate 3 and the blade 21 to each other. And a step of integrating the side plate 3.
この構成により、羽根２１または主板２の表面を加工することが容易であるので、羽根車１内の流路表面の加工を容易化する。主板２の表面を削り出し加工して複数の羽根２１を形成するので、羽根２１の寸法のばらつきを低減することができ、流路形状のばらつきを低減することができる。主板２及び側板３にステンレスなどの高強度材料を用いることができるので、機械的な強度を向上させることができる。このように、羽根車１内の流路表面の加工を容易化し且つ流路形状のばらつきを低減し且つ機械的な強度を向上させることができる。 With this configuration, since it is easy to process the surface of the blade 21 or the main plate 2, the processing of the surface of the flow path in the impeller 1 is facilitated. Since the surface of the main plate 2 is machined to form the plurality of blades 21, variations in the dimensions of the blades 21 can be reduced, and variations in the flow path shape can be reduced. Since a high-strength material such as stainless steel can be used for the main plate 2 and the side plate 3, the mechanical strength can be improved. Thus, the processing of the flow path surface in the impeller 1 can be facilitated, the variation in the flow path shape can be reduced, and the mechanical strength can be improved.
また従来の羽根車の製造方法では鋳造では一体的に羽根車が製造されるため、羽根車内の羽根の３次元計測及び羽根の機械加工が難しいという問題があった。更に、鋳造では、型を用いるため、羽根車の形状に制約があった。それに対し、本実施形態に係る羽根車の製造方法によれば、主板２の表面を削り出し加工して複数の羽根２１を形成した後であって且つ側板３を主板２の上に配置する前に、羽根２１の３次元計測及び羽根２１の機械加工を行うことができるので、羽根２１の３次元計測及び羽根２１の機械加工を容易化できる。また、主板２の表面を削り出し加工して複数の羽根２１を形成するので、羽根車１の形状の制約を少なくすることができる。 In addition, since the conventional impeller manufacturing method integrally manufactures the impeller by casting, there is a problem that three-dimensional measurement of the blades in the impeller and the machining of the blades are difficult. Furthermore, since a mold is used in casting, the shape of the impeller is limited. On the other hand, according to the manufacturing method of the impeller according to the present embodiment, after the surface of the main plate 2 is machined to form the plurality of blades 21 and before the side plate 3 is disposed on the main plate 2. In addition, since the three-dimensional measurement of the blade 21 and the machining of the blade 21 can be performed, the three-dimensional measurement of the blade 21 and the machining of the blade 21 can be facilitated. In addition, since the surface of the main plate 2 is machined to form the plurality of blades 21, restrictions on the shape of the impeller 1 can be reduced.
また、本実施形態に係る羽根車１は、主板２と、側板３と、主板２と側板３の間に設けられた複数の羽根２１と、を備え、複数の羽根２１の負圧側の表面は親水性の加工がされている。この構成により、流れの剥離により水の流れが逆流する剥離領域が形成されるのを防止することができるので、羽根車１の仕事効率の低下を防止することができる。 Further, the impeller 1 according to the present embodiment includes a main plate 2, a side plate 3, and a plurality of blades 21 provided between the main plate 2 and the side plate 3, and the surface on the negative pressure side of the plurality of blades 21 is Hydrophilic processing is done. With this configuration, it is possible to prevent a separation region where the flow of water flows backward due to the separation of the flow, and thus it is possible to prevent a reduction in work efficiency of the impeller 1.
以上、本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。更に、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。 As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
１：羽根車、２：主板、３：側板、２１：羽根、３１：溝、３２：溶融池、３３：アーク放電、３４：電極、３５：筐体、３２１：裏波、ＦＲ：活性フラックス 1: impeller, 2: main plate, 3: side plate, 21: blade, 31: groove, 32: molten pool, 33: arc discharge, 34: electrode, 35: casing, 321: back wave, FR: active flux
Claims (5)
側板の表面に前記羽根の形状に合わせた溝を形成する工程と、
前記溝の水平位置と前記羽根の水平位置が略一致するように、前記側板を前記主板の上に配置する工程と、
前記側板と前記羽根との溶接を実行して、前記主板と前記側板を一体化する工程と、
を有する羽根車の製造方法。 Machining the surface of the main plate to form a plurality of blades;
Forming a groove in accordance with the shape of the blade on the surface of the side plate;
Disposing the side plate on the main plate so that the horizontal position of the groove and the horizontal position of the blade substantially coincide with each other;
Performing welding of the side plate and the blade to integrate the main plate and the side plate;
The manufacturing method of the impeller which has.
請求項１に記載の羽根車の製造方法。 The impeller manufacturing method according to claim 1, wherein the welding is A-TIG welding.
請求項１に記載の羽根車の製造方法。 The impeller manufacturing method according to claim 1, wherein the execution of the welding in the step of integrating the main plate and the side plate is A-TIG welding and then MAG welding or covering arc welding. .
請求項１から３のいずれか一項に記載の羽根車の製造方法。 The impeller manufacturing method according to any one of claims 1 to 3, further comprising a step of polishing a surface of the blade and / or the main plate before the step of disposing the side plate on the main plate.
請求項１から４のいずれか一項に記載の羽根車の製造方法。 The method for manufacturing an impeller according to any one of claims 1 to 4, further comprising a step of turning the surface of the side plate after the step of integrating.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107664139A (en) * | 2017-09-28 | 2018-02-06 | 镇江三联泵业机械成套设备有限公司 | The impeller of blade easy to disassemble |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107664139A (en) * | 2017-09-28 | 2018-02-06 | 镇江三联泵业机械成套设备有限公司 | The impeller of blade easy to disassemble |
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