KR20120073629A - Fan prevented crack of blade - Google Patents

Fan prevented crack of blade Download PDF

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Publication number
KR20120073629A
KR20120073629A KR1020100135450A KR20100135450A KR20120073629A KR 20120073629 A KR20120073629 A KR 20120073629A KR 1020100135450 A KR1020100135450 A KR 1020100135450A KR 20100135450 A KR20100135450 A KR 20100135450A KR 20120073629 A KR20120073629 A KR 20120073629A
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KR
South Korea
Prior art keywords
blade
fan
fan body
prevented
blades
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KR1020100135450A
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Korean (ko)
Inventor
이용준
차지회
임종윤
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주식회사 포스코
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Priority to KR1020100135450A priority Critical patent/KR20120073629A/en
Publication of KR20120073629A publication Critical patent/KR20120073629A/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/002—Details, component parts, or accessories 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
    • F04D29/02—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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible
    • 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
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • 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
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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

Abstract

PURPOSE: A fan having high intensity in which cracks of blades are prevented is provided to decentralize stress concentration on blades by reinforcing the blades and a fan body without changing a thickness of the blades. CONSTITUTION: A fan having high intensity in which cracks of blades are prevented comprises a fan body, a plurality of blades(140), and a reinforcing unit(200). A rotary shaft is connected to the fan body. The lower part of the blade is joined to be diagonally touched along the lateral side of the fan body. The reinforcing unit covers an end part(142) of a contacted ling where the blade and fan body are joined and the outer circumference of the reinforcing unit have an inclination toward the upper part of the blade. A height of the reinforcing unit becomes increased from the fan body toward the blade side.

Description

블레이드의 균열이 방지된 고강도 팬 {FAN PREVENTED CRACK OF BLADE}FRONT-VENVEN CRACK OF BLADE

본 발명은 블레이드와 팬 몸체의 결합부가 보강됨으로써 응력 집중으로 인한 파단이 저지되어 블레이드의 균열이 방지된 고강도 팬에 관한 것이다.The present invention relates to a high-strength fan in which the fracture due to stress concentration is prevented by reinforcing the coupling portion of the blade and the fan body to prevent cracking of the blade.

기존의 팬의 경우, 블레이드와 팬몸체의 용접부가 균열이 생겨 블레이드가 파손되는 경우가 많다. 팬의 성능을 결정하는데는 블레이드의 곡선형태가 매우 중요한데, 종래의 팬의 경우 블레이드의 시작 위치와 끝나는 위치의 두께가 일정하며, 보통 제작업체에 따른 블레이드의 곡선이 정해져 있다. In the case of a conventional fan, the welds of the blades and the fan body are cracked and the blades are often broken. Blade shape is very important in determining the performance of the fan, in the case of a conventional fan, the thickness of the starting position and the end position of the blade is constant, and the blade curve is usually determined according to the manufacturer.

하지만 제철소 현장 등에서 사용되는 팬의 경우 고온의 기체를 통과시켜야 하고, 고속인 경우가 많다. 이러한 경우 블레이드의 끝 부분부터 파손이 시작되어 절단되어 블레이드가 팬몸체로부터 파단되어 날라가는 경우가 많다.However, in the case of a fan used in a steel mill site, it is necessary to pass a gas of high temperature, and is often a high speed. In such a case, breakage starts from the end of the blade and is cut so that the blade is blown away from the fan body in many cases.

특히, 제철소에서 사용되는 팬의 경우, 고온의 가스를 통과시켜야 하고 많은 양의 기체를 이송하여야 하는 매우 열악한 환경에서 기계가 작동한다. 이러한 고온, 고속의 조건에서 블레이드의 끝 부분, 특히 용접부에서 피로 파손 등의 파손이 시작되고, 이러한 파손은 진전되어 블레이드가 절단되는 경우가 많다. 또한 대형설비에 팬이 위치하기 때문에, 팬 절단시 수리가 매우 복잡하고, 조업에 영향을 주어 생산량에 차질을 주는 경우가 많다. In particular, in the case of fans used in steel mills, the machine operates in a very poor environment in which hot gas must pass through and a large amount of gas must be transported. Under such high temperature and high speed conditions, breakage, such as fatigue breakage, is started at the end of the blade, in particular, the welded portion, and such breakage is often advanced and the blade is cut. In addition, since the fan is located in a large facility, the repair is very complicated when cutting the fan, affecting the operation often affects the production.

도 1은 종래의 블레이드를 구조해석한 도면으로서, 구조해석을 통한 분석결과 블레이드(140)의 용접부에서 집중 응력이 발생하며, 이러한 결과를 볼 때 전체 블레이드(140) 두께변경이 필요 없이 집중응력이 발생하는 부분(142)의 형상을 변경함으로써 집중응력을 막고 균열시작을 방지할 수 있다. FIG. 1 is a view illustrating a structure of a conventional blade, in which a stress analysis occurs in the welded portion of the blade 140 as a result of analysis through a structural analysis. By changing the shape of the generated portion 142, it is possible to prevent the concentrated stress and to prevent the onset of cracking.

특히, 블레이드(140)와 팬몸체(120)가 용접되는 부분 중 끝단부(142)에서 가장 큰 응력이 집중되는 것을 알 수 있다.In particular, it can be seen that the greatest stress is concentrated at the end portion 142 of the portion where the blade 140 and the fan body 120 are welded.

상기의 배경기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안될 것이다.The matters described as the background art are only for the purpose of enhancing the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related arts already known to those skilled in the art.

본 발명은 이러한 문제점을 해결하기 위하여 제안된 것으로, 블레이드의 두께를 조절할 필요 없이 블레이드와 팬몸체의 결합부위를 보강하여 블레이드의 피로파손을 방지하는 블레이드의 균열이 방지된 고강도 팬을 제공하는데 그 목적이 있다.The present invention has been proposed to solve this problem, to provide a high-strength fan that is prevented from cracking of the blade to prevent fatigue damage of the blade by reinforcing the coupling portion of the blade and the fan body without having to adjust the thickness of the blade. There is this.

상기의 목적을 달성하기 위한 본 발명에 따른 블레이드의 균열이 방지된 고강도 팬은, 회전축이 연결되는 팬몸체; 상기 팬몸체의 측면부를 따라 하단부가 비스듬히 접하여 결합된 복수의 블레이드; 및 상기 블레이드와 팬몸체가 결합된 접선의 단부를 감싸는 형상으로 결합되며, 외주면이 블레이드의 상단을 향하는 기울기를 갖도록 형성되되 팬몸체로부터 블레이드측으로 갈수록 높이가 높아지도록 형성된 보강부;를 포함한다.The high-strength fan is prevented from cracking the blade according to the present invention for achieving the above object, the fan body is connected to the rotating shaft; A plurality of blades having a lower end coupled obliquely along side surfaces of the fan body; And a reinforcement part which is coupled in a shape surrounding an end portion of the tangent in which the blade and the fan body are coupled to each other, the outer circumferential surface of which is formed to have an inclination toward the top of the blade, and the height of which is increased from the fan body toward the blade side.

상기 보강부는 블레이드와 팬몸체가 결합된 접선의 단부를 감싸는 반구체 형상일 수 있다.The reinforcing part may have a hemispherical shape surrounding an end portion of a tangential line between the blade and the fan body.

상기 보강부는 팬몸체로부터 블레이드까지 연결되는 부분의 단면이 삼각형이 되도록 형성될 수 있다.The reinforcement portion may be formed so that the cross section of the portion connected from the fan body to the blade becomes a triangle.

상기 보강부는 팬몸체로부터 블레이드까지 연결되는 부분의 단면이 만입된 곡선의 형상이 되도록 형성될 수 있다.The reinforcement may be formed so that the cross section of the portion connected from the fan body to the blade is in the shape of a curved curve.

상기 보강부는 블레이드의 측단부 외주면이 복수의 기울기를 갖는 깎인부분을 갖도록 형성되며, 깎인부분의 기울기는 상방으로 갈수록 완만하게 되도록 형성될 수 있다.The reinforcement portion may be formed such that the outer peripheral surface of the side end of the blade has a cut portion having a plurality of inclinations, and the inclination of the cut portion may be formed to be smoother upward.

상술한 바와 같은 구조로 이루어진 블레이드의 균열이 방지된 고강도 팬에 따르면, 블레이드의 두께를 변경하지 않더라도 블레이드와 팬몸체를 보강함으로써 블레이드에 집중되는 응력을 분산할 수 있다.According to the high-strength fan prevented from cracking of the blade having the structure as described above, it is possible to distribute the stress concentrated on the blade by reinforcing the blade and the fan body without changing the thickness of the blade.

블레이드에 집중되는 응력을 감소시킴으로써 고온, 고압의 작동환경 하에서도 블레이드가 팬몸체로부터 파단되어 날아가는 경우를 방지할 수 있다.By reducing the stress concentrated on the blade, it is possible to prevent the blade from being blown off from the fan body even under a high temperature and high pressure operating environment.

도 1은 종래의 팬에 집중되는 응력을 분석한 구조해석 도면.
도 2는 본 발명의 일 실시예에 따른 블레이드의 균열이 방지된 고강도 팬의 블레이드를 나타낸 정면도.
도 3은 도 2에 도시된 블레이드의 또 다른 도면으로서, (a)는 블레이드의 측면도, (b)는 블레이드의 평면도.
도 4는 도 2에 도시된 블레이드 보강부의 또 다른 실시예를 나타낸 도면.1 is a structural analysis diagram analyzing the stress concentrated in the conventional fan.
Figure 2 is a front view showing the blade of the high-strength fan prevented cracking of the blade according to an embodiment of the present invention.
Figure 3 is another view of the blade shown in Figure 2, (a) is a side view of the blade, (b) is a plan view of the blade.
4 is a view showing another embodiment of the blade reinforcement shown in FIG.

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예에 따른 블레이드의 균열이 방지된 고강도 팬에 대하여 살펴본다.Hereinafter, with reference to the accompanying drawings looks at with respect to the high-strength fan of the blade is prevented in accordance with a preferred embodiment of the present invention.

도 2는 본 발명의 일 실시예에 따른 블레이드의 균열이 방지된 고강도 팬의 블레이드를 나타낸 정면도이고, 도 3은 도 2에 도시된 블레이드의 또 다른 도면으로서, (a)는 블레이드의 측면도이며, (b)는 블레이드의 평면도이다.Figure 2 is a front view showing the blade of the high-strength fan prevented cracking of the blade according to an embodiment of the present invention, Figure 3 is another view of the blade shown in Figure 2, (a) is a side view of the blade, (b) is a top view of the blade.

본 발명의 일 실시예에 따른 블레이드의 균열이 방지된 고강도 팬은, 회전축이 연결되는 팬몸체(120); 상기 팬몸체(120)의 측면을 따라 결합된 복수의 블레이드(140); 및 상기 블레이드(140)와 팬몸체(120)가 결합된 접선의 단부(142)를 감싸는 형상으로 결합되며, 외주면이 블레이드(140)의 상단을 향하는 기울기를 갖도록 형성되되 팬몸체(120)로부터 블레이드(140)측으로 갈수록 높이가 높아지도록 형성된 보강부(200);를 포함한다.The high-strength fan of which the crack of the blade is prevented according to an embodiment of the present invention, the fan body 120 is connected to the rotating shaft; A plurality of blades 140 coupled along the side of the fan body 120; And the blade 140 and the fan body 120 are coupled in a shape surrounding the end portion 142 of the tangential line coupled thereto, and the outer circumferential surface thereof is formed to have an inclination toward the top of the blade 140, but the blade from the fan body 120. It includes; the reinforcement portion 200 formed so as to increase in height toward the 140.

본 발명의 일 실시예에 따른 블레이드의 균열이 방지된 고강도 팬은 도시된 바와 같이, 원통형의 팬몸체(120)에 그 측면을 따라 복수의 블레이드(140)가 비스듬히 경사진 상태로 연속하여 결합될 수 있다. 다만, 이러한 팬의 형상은 일 실시예로서의 형상에 불과할 뿐 그 외 본 발명이 적용될 수 있는 형상을 모두 포함한다.High strength fan prevented crack of the blade according to an embodiment of the present invention, as shown, the plurality of blades 140 along the side of the cylindrical fan body 120 to be continuously coupled in an obliquely inclined state. Can be. However, the shape of the fan is merely a shape as an embodiment, and includes all other shapes to which the present invention may be applied.

블레이드(140)는 팬몸체(120)에 보통 용접결합 방식으로 결합되는데, 고온, 고압의 환경하에서 팬이 장시간 작동할 경우 블레이드와 팬몸체(120)가 결합된 부분에서 균열이 발생할 수 있다.The blade 140 is normally coupled to the fan body 120 by welding. When the fan is operated for a long time in an environment of high temperature and high pressure, cracks may occur at a portion where the blade and the fan body 120 are coupled to each other.

특히, 앞서 살핀 바와 같이, 블레이드(140)와 팬몸체(120)가 접한 부분의 단부에서 피로도가 가장 집중됨을 알 수 있으며, 이를 보강하기 위해 보강부(200)가 형성된다.In particular, as described above, it can be seen that the fatigue is most concentrated at the end portion of the portion in contact with the blade 140 and the fan body 120, the reinforcement 200 is formed to reinforce this.

구체적으로, 보강부(200)는 블레이드(140)와 팬몸체(120)가 결합된 접선의 단부(142)를 감싸는 형상으로 결합된다. 또한, 보강부는 팬몸체에서 시작하여 상방으로 블레이드를 타고 상승되는 형상인데, 그 외주면이 블레이드(140)의 상단을 향하는 기울기를 갖도록 형성되되 팬몸체(120)로부터 블레이드(140)측으로 갈수록 높이가 높아지도록 형성된다.Specifically, the reinforcement 200 is coupled in a shape surrounding the end portion 142 of the tangent to which the blade 140 and the fan body 120 are coupled. In addition, the reinforcement is starting from the fan body is a shape that is elevated upwards ride on the blade, the outer peripheral surface is formed to have an inclination toward the top of the blade 140, but the height increases toward the blade 140 from the fan body 120 side It is formed to.

이러한 보강부(200)의 형상은 단순히 응력이 집중되는 지점을 보강한다는 개념을 넘어서 팬몸체(120)로부터 블레이드(140)의 산단부를 향하며 높이가 높아짐과 동시에 그 기울기가 블레이드(140)의 상단을 향하도록 기울어져 마치 산과 같은 형상을 갖도록 하는 것이다.The shape of the reinforcement part 200 goes beyond the concept of simply reinforcing the point where the stress is concentrated, from the fan body 120 toward the top end of the blade 140, while the height thereof increases and the inclination of the reinforcement part 200 increases. It is inclined so that it is shaped like a mountain.

이러한 보강부(200)의 형상은 강한 바람이 형성되어 응력이 집중되는 지점에서, 형성되는 바람을 자연스럽게 블레이드(140)의 상단측으로 유도함으로써 팬으로부터 발생되는 바람이 저항을 갖지 않고 부드럽게 나아가도록 하는 것이다.The shape of the reinforcement part 200 is that at the point where the strong wind is formed and the stress is concentrated, the wind is naturally induced to the upper side of the blade 140 so that the wind generated from the fan smoothly proceeds without resistance. .

또한, 동시에 응력이 집중되는 부분의 면적이 넓어짐에 따라 국소부위의 피로파손 가능성이 현저히 감소되는 것이다.At the same time, as the area of the stress-intensive part becomes larger, the possibility of fatigue failure of the localized area is significantly reduced.

구체적으로, 상기 보강부(200)는 블레이드(140)와 팬몸체(120)가 결합된 접선의 단부를 감싸는 반구체 형상이 되도록 할 수 있다. 이러한 반구체 형상은 블레이드와 팬몸체(120)가 결합되는 지점을 폭넓게 커버함으로써 국소부위의 응력집중을 막을 수 있고, 또한 외측면이 유선형으로 형성되며 그 기울기가 반구체를 따라 블레이드의 상단을 향하는 기울기에서 점차 팬몸체(120)와 수평을 이루는 기울기로 변화됨으로써 바람의 저항을 좀 더 약화시키고 팬의 효율을 상승시키며 와류의 발생을 억제한다는데 있다.In detail, the reinforcement part 200 may have a hemispherical shape surrounding the end portion of the tangent in which the blade 140 and the fan body 120 are coupled to each other. This hemispherical shape can cover the point where the blade and the fan body 120 is coupled widely to prevent the stress concentration of the local area, and also the outer surface is formed in a streamlined shape and the inclination of the hemisphere toward the top of the blade along the hemisphere By gradually changing the inclination in parallel with the fan body 120 in the inclination to further weaken the wind resistance, increase the efficiency of the fan and suppress the generation of vortex.

한편, 또 다른 실시예로서, 상기 보강부(200)는 팬몸체(120)로부터 블레이드(140)까지 연결되는 부분의 단면이 삼각형이 되도록 형성될 수 있다.On the other hand, as another embodiment, the reinforcement portion 200 may be formed so that the cross section of the portion connected from the fan body 120 to the blade 140 is a triangle.

도 4는 이러한 다양한 실시예의 보강부를 나타낸다. 도 4의 (a)는 보강부(200)가 완만한 구릉지대와 같이 그 단면이 반타원을 이루는 경우이다. 또한, 도 4의 (b)는 보강부가 팬몸체(120)로부터 블레이드(140)까지 연결되는 부분의 단면이 삼각형인 것으로서, 이 경우 역시 삼각형의 기울기를 타고 바람이 블레이드(140)의 측면을 따라 자연스럽게 퍼지도록 하여 저항이 감소될 수 있는 것이다.4 illustrates the reinforcements of these various embodiments. 4A illustrates a case in which the reinforcement part 200 forms a half ellipse, such as a gentle hilly area. In addition, Figure 4 (b) is a cross-section of the portion where the reinforcing portion is connected to the blade 140 from the fan body 120 is a triangle, in this case also the wind along the side of the blade 140 riding the slope of the triangle The resistance can be reduced by allowing it to spread naturally.

한편, 도 4의 (c)는 보강부(200)가 블레이드(140)의 측단부 외주면이 복수의 기울기를 갖는 깎인부분을 갖도록 형성되며, 깎인부분의 기울기는 상방으로 갈수록 완만하게 되도록 형성된 것을 나타낸다. 보강부(200)의 기울기가 처음에는 블레이드의 상단을 향하되 다소 가파르게 형성되나, 점차 그 기울기가 감소되는 형식으로 복수회 꺾인 모양으로 형성되는 것이다.On the other hand, Figure 4 (c) shows that the reinforcement portion 200 is formed so that the outer peripheral surface of the side end portion of the blade 140 has a plurality of inclined portion having a plurality of inclination, the inclination of the cut portion is formed to be smoother upwards. . The inclination of the reinforcement part 200 is initially formed toward the top of the blade, but rather steeply, but is formed in the shape of being bent a plurality of times in such a way that the inclination is gradually reduced.

한편, 도 4의 (d)는 보강부(200)가 팬몸체(120)로부터 블레이드(140)까지 연결되는 부분의 단면이 만입된 곡선의 형상이 되도록 형성된 것으로서, 바람을 자연스럽게 받으며 바람이 블레이드의 측단면을 타고 상승되도록 하는 것이다.On the other hand, Figure 4 (d) is the reinforcement portion 200 is formed so that the cross section of the portion connected from the fan body 120 to the blade 140 is indented curve shape, the wind naturally receives the wind of the blade It is to be ascend by side.

이러한 구조로 이루어진 블레이드의 균열이 방지된 고강도 팬에 따르면, 블레이드의 두께를 변경하지 않더라도 블레이드(140)와 팬몸체(120)의 접합부를 보강함으로써 블레이드(140)에 집중되는 응력을 분산할 수 있다.According to the high-strength fan prevented from cracking of the blade having such a structure, it is possible to disperse the stress concentrated on the blade 140 by reinforcing the junction of the blade 140 and the fan body 120 without changing the thickness of the blade. .

또한, 블레이드(140)에 집중되는 응력을 감소시킴으로써 고온, 고압의 작동환경 하에서도 블레이드(140)가 팬몸체(120)로부터 파단되어 날아가는 경우를 방지할 수 있으며, 보강부의 형상이 블레이드(140)의 상단을 향하는 기울기를 갖도록 형성되되 팬몸체(120)로부터 블레이드(140)측으로 갈수록 높이가 높아지도록 형성됨으로써 바람의 저항을 감소시켜, 피로도를 감소시키고 소음을 저감하며 팬의 구동효율을 상승시키게 된다.In addition, by reducing the stress concentrated on the blade 140, the blade 140 can be prevented from being blown away from the fan body 120 even under a high temperature and high pressure operating environment, the shape of the reinforcement portion of the blade 140 Is formed to have an inclination toward the top of the fan body 120 is formed so as to increase in height toward the blade 140 to reduce the resistance of the wind, reducing fatigue and noise and increase the driving efficiency of the fan .

본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당 업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

120 : 팬몸체 140 : 블레이드
200 : 보강부 120: fan body 140: blade
200: reinforcement

Claims (5)

회전축이 연결되는 팬몸체(120);
상기 팬몸체(120)의 측면부를 따라 하단부가 비스듬히 접하도록 결합된 복수의 블레이드(140); 및
상기 블레이드(140)와 팬몸체(120)가 결합된 접선의 단부(142)를 감싸는 형상으로 결합되며, 외주면이 블레이드(140)의 상단을 향하는 기울기를 갖도록 형성되되 팬몸체(120)로부터 블레이드(140)측으로 갈수록 높이가 높아지도록 형성된 보강부(200);를 포함하는 블레이드의 균열이 방지된 고강도 팬.Fan body 120 is connected to the rotating shaft;
A plurality of blades 140 coupled to the lower end at an angle along the side surface of the fan body 120; And
The blade 140 and the fan body 120 is coupled in a shape surrounding the end portion 142 of the tangential coupling, the outer circumferential surface is formed to have an inclination toward the top of the blade 140, the blade (from the fan body 120) High strength fan prevented crack of the blade comprising a; reinforcing part 200 formed so as to increase in height toward the side 140. 청구항 1에 있어서,
상기 보강부(200)는 블레이드(140)와 팬몸체(120)가 결합된 접선의 단부를 감싸는 반구체 형상인 것을 특징으로 하는 블레이드의 균열이 방지된 고강도 팬.The method according to claim 1,
The reinforcement part 200 is a high strength fan of the blade is prevented crack, characterized in that the hemispherical shape surrounding the end of the tangent coupled to the blade 140 and the fan body 120. 청구항 1에 있어서,
상기 보강부(200)는 팬몸체(120)로부터 블레이드(140)까지 연결되는 부분의 단면이 삼각형이 되도록 형성된 것을 특징으로 하는 블레이드의 균열이 방지된 고강도 팬.The method according to claim 1,
The reinforcement part 200 is a high strength fan of the blade is prevented, characterized in that the cross-section of the portion connected from the fan body 120 to the blade 140 is formed in a triangle. 청구항 1에 있어서,
상기 보강부(200)는 팬몸체(120)로부터 블레이드(140)까지 연결되는 부분의 단면이 만입된 곡선의 형상이 되도록 형성된 것을 특징으로 하는 블레이드의 균열이 방지된 고강도 팬.The method according to claim 1,
The reinforcement part 200 is a high-strength fan of the blade is prevented, characterized in that the cross section of the portion connected from the fan body 120 to the blade 140 is formed in the shape of a curved curve. 청구항 1에 있어서,
상기 보강부(200)는 블레이드(140)의 측단부 외주면이 복수의 기울기를 갖는 깎인부분을 갖도록 형성되며, 깎인부분의 기울기는 상방으로 갈수록 완만하게 되도록 형성된 것을 특징으로 하는 블레이드의 균열이 방지된 고강도 팬.The method according to claim 1,
The reinforcement part 200 is formed so that the outer peripheral surface of the side end portion of the blade 140 has a plurality of inclined cut portions, the inclination of the cut portion is formed so as to be gentle toward the top is prevented cracking of the blade High strength fan.
KR1020100135450A 2010-12-27 2010-12-27 Fan prevented crack of blade KR20120073629A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3034880A1 (en) * 2014-12-15 2016-06-22 Pfeiffer Vacuum Gmbh Rotor assembly for a vacuum pump and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3034880A1 (en) * 2014-12-15 2016-06-22 Pfeiffer Vacuum Gmbh Rotor assembly for a vacuum pump and method for producing the same

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