KR101055801B1 - Structure for fixing impeller - Google Patents

Structure for fixing impeller Download PDF

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Publication number
KR101055801B1
KR101055801B1 KR1020100130260A KR20100130260A KR101055801B1 KR 101055801 B1 KR101055801 B1 KR 101055801B1 KR 1020100130260 A KR1020100130260 A KR 1020100130260A KR 20100130260 A KR20100130260 A KR 20100130260A KR 101055801 B1 KR101055801 B1 KR 101055801B1
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South Korea
Prior art keywords
small diameter
diameter portion
impeller
circumferential surface
area
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KR1020100130260A
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Korean (ko)
Inventor
유일수
박준영
황순찬
박무룡
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한국기계연구원
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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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F04D29/054—Arrangements for joining or assembling shafts
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • 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
    • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: An impeller connecting structure is provided to connect and release an impeller in a driving shaft without shrink-on. CONSTITUTION: An impeller connecting structure comprises a driving shaft(110), a rotator, a fixing part, and a fastening release part. The drive shaft is extended from a large diameter part and is composed of the large diameter part and a small diameter part. End part which is extended from the small diameter part is contacted with cross end part of the large diameter part.

Description

임펠러 체결구조{STRUCTURE FOR FIXING IMPELLER}Impeller Fastening Structure {STRUCTURE FOR FIXING IMPELLER}

본 발명은 임페러 체결구조에 관한 것으로서, 보다 상세하게는 구동축과의 체결 및 체결해제를 용이하게 할 수 있는 임펠러 체결구조에 관한 것이다.The present invention relates to an impeller fastening structure, and more particularly to an impeller fastening structure that can facilitate the fastening and release of the drive shaft.

일반적으로 압축기는 날개차나 로터의 회전운동 또는 피스톤의 왕복운동으로 공기나 냉매가스와 같은 기체를 압축시키는 것으로서, 특히, 터보 압축기는 공기 압축기의 일종으로 와류펌프와 같은 구조의 원심 압축기 및 터빈형의 축력 압축기로 구분된다.In general, a compressor compresses a gas such as air or refrigerant gas by a rotor wheel or a rotor rotation or a reciprocating motion of a piston. In particular, a turbo compressor is a type of air compressor. It is divided into axial force compressor.

이러한 펌프 또는 압축기에서 이용되는 임펠러는 구동축와 결합되어, 구동축이 회전함에 따라 회전하게 된다. 따라서, 임펠러와 축간 결합의 견고성은 전체 제품의 성능 및 불량을 결정하는 요소이다.The impeller used in such a pump or compressor is coupled to the drive shaft, and rotates as the drive shaft rotates. Therefore, the tightness of the impeller and shaft coupling is a factor that determines the performance and failure of the whole product.

도 1은 종래의 임펠러 체결구조의 일례의 단면도이다.1 is a cross-sectional view of an example of a conventional impeller fastening structure.

도 1을 참조하면, 종래에는 대경부(12)와 중앙으로부터 단차지는 소경부(13)로 형성되는 구동축(11)을 열을 가하여 일시적으로 내경이 커지는 임펠러(14)에 삽입시킨 후에 임펠러(14)를 냉각시킴으로써 구동축(11)을 임펠러(14)에 열박음 하였다. 그 후에 임펠러(14)와 체결되어 외부로 돌출되는 구동축(11)의 단부를 나사(15)로 마무리 하여 임펠러가 헛도는 것을 방지하는 방식의 임펠러 결합구조(10)가 이용되었다.Referring to FIG. 1, in the related art, a drive shaft 11 formed of a large diameter portion 12 and a small diameter portion 13 stepped from the center is applied to an impeller 14 that temporarily increases its internal diameter by applying heat to the impeller 14. ), The drive shaft 11 was snapped to the impeller 14 by cooling. After that, the impeller coupling structure 10 of the type which prevents the impeller from being lost by finishing the end of the drive shaft 11 which is engaged with the impeller 14 and protrudes outward with the screw 15 is used.

다만, 이러한 종래의 임펠러 결합구조(10)에서 보수 또는 교환을 위해서 한번 열박음 된 임펠러(14)를 구동축으로부터 체결해제하는 것이 어려웠으며, 마무리 결합된 나사(15)가 임펠러(14)의 고속 회전 중에 체결해제됨으로써 불량의 원인이 되는 문제가 있었다.However, in such a conventional impeller coupling structure 10, it was difficult to release the impeller 14, which was once shrinked for driving or replacement, from the drive shaft, and the screw 15, which is coupled to the finish, is rotated at high speed of the impeller 14. There was a problem that the cause of the failure by being released during the engagement.

따라서, 본 발명의 목적은 이와 같은 종래의 문제점을 해결하기 위한 것으로서, 열박음 없이 구동축에 임펠러를 체결하고 이를 용이하게 해제할 수 있는 임펠러 체결구조를 제공함에 있다.Accordingly, an object of the present invention is to solve such a conventional problem, and to provide an impeller fastening structure capable of fastening an impeller to a drive shaft without shrinkage and easily releasing it.

상기 목적은, 본 발명에 따라, 대경부와 상기 대경부로부터 연장되고 상기 대경부 보다 작은 직경의 소경부로 구성되는 구동축; 상기 소경부가 삽입되는 관통구가 형성되되, 상기 소경부에서부터 연장되는 대경부의 단면상에 단부가 접촉하는 회전체; 상기 구동축으로부터 상기 회전체의 이탈을 방지하도록 상기 소경부의 외주면과 상기 관통구의 내주면 사이 공간에 삽입됨으로써 억지끼움되되, 외주면을 따라서 제1나사산이 형성되는 고정부; 상기 고정부의 제1나사산과 나사결합 하도록 내주면에 제2나사산이 형성되고, 위치가 고정된 상태에서 상기 제2나사산이 상기 제1나사산과 결합함으로써 삽입되는 방향의 반대방향으로 상기 고정부를 이동시켜 상기 관통구로부터 상기 고정부의 억지끼움을 해제하는 체결해제부;를 포함하는 것을 특징으로 하는 임펠러 체결구조에 의해 달성된다.The object is, according to the present invention, a drive shaft comprising a large diameter portion and a small diameter portion extending from the large diameter portion and smaller in diameter than the large diameter portion; A rotating body having a through hole into which the small diameter part is inserted, the end of the rotating body contacting an end surface of the large diameter part extending from the small diameter part; A fixing part inserted into the space between the outer circumferential surface of the small diameter portion and the inner circumferential surface of the through hole so as to prevent the rotation of the rotating body from the driving shaft, and having a first screw thread formed along the outer circumferential surface; A second screw thread is formed on an inner circumferential surface to screw the first screw thread of the fixing part, and the fixing part is moved in a direction opposite to the direction in which the second screw thread is inserted by engaging the first screw thread while the position is fixed. It is achieved by the impeller fastening structure comprising a; release the release portion for releasing the interference fit of the fixing portion from the through-hole.

또한, 상기 고정부는 상기 소경부의 외주면을 감싸는 형태로 구성되고, 일단부에서부터 타단부까지 길이방향을 따라서 절개되는 절개라인을 중심으로 양쪽으로 벌어짐으로써 탄성 변형될 수 있다.In addition, the fixing portion is formed in a form surrounding the outer peripheral surface of the small diameter portion, it can be elastically deformed by opening to both sides around the incision line cut along the longitudinal direction from one end to the other end.

또한, 상기 관통구는 내주면이 상기 소경부와 접촉하는 제1관통영역과 상기 제1관통영역으로부터 연장되어 상기 제1관통영역의 반대방향을 따라서 내경이 점점 커지게 형성되는 제2관통영역을 포함하고, 상기 고정부는 상기 소경부의 외주면과 상기 제2관통영역의 내주면 사이 공간에 삽입될 수 있다.In addition, the through hole may include a first through region in which the inner circumferential surface is in contact with the small diameter portion and a second through region in which the inner diameter is gradually increased along the opposite direction of the first through region to extend from the first through region. The fixing part may be inserted into a space between an outer circumferential surface of the small diameter part and an inner circumferential surface of the second through area.

또한, 상기 고정부는 외주면이 상기 제2관통영역의 내주면에 면접촉하도록 상기 소경부에 삽입되는 반대 방향으로 외경이 점점 커지게 형성될 수 있다.In addition, the fixing portion may be formed such that the outer diameter is gradually increased in the opposite direction to be inserted into the small diameter portion such that the outer peripheral surface is in surface contact with the inner peripheral surface of the second through area.

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본 발명에 따르면, 열박음 없이 구동축에 체결할 수 있는 임펠러 체결구조가 제공된다.According to the present invention, an impeller fastening structure capable of fastening to a drive shaft without shrinkage is provided.

또한, 축과 결합되는 관통구의 영역을 두부분으로 분할하고, 일영역을 테이퍼진 형상으로 구성함으로써 고정부와의 체결력을 향상시킬 수 있다.In addition, by dividing the region of the through-hole coupled to the shaft into two parts, and forming one region in a tapered shape, the fastening force with the fixing portion can be improved.

또한, 절개부가 형성되는 고정부를 이용함으로써 구동축의 직경변화에 용이하게 대응할 수 있다.In addition, it is possible to easily cope with a change in the diameter of the drive shaft by using a fixing portion formed with a cutout.

또한, 나사결합을 통하여 고정부를 체결해제함으로써, 임펠러와 축간의 체결을 용이하게 해제할 수 있다.In addition, by releasing the fixing part through screwing, the fastening between the impeller and the shaft can be easily released.

도 1은 종래의 임펠러 체결구조의 일례의 단면도이고,
도 2는 본 발명의 일실시예에 따른 임펠러 체결구조의 단면도이고,
도 3은 본 발명의 일실시예에 따른 임펠러 체결구조의 분해사시도이고,
도 4는 본 발명의 일실시예에 따른 임펠레 체결구조의 체결해제 과정을 개략적으로 도시한 것이다.1 is a cross-sectional view of an example of a conventional impeller fastening structure,
Figure 2 is a cross-sectional view of the impeller fastening structure according to an embodiment of the present invention,
Figure 3 is an exploded perspective view of the impeller fastening structure according to an embodiment of the present invention,
Figure 4 schematically shows the release process of the impeller fastening structure according to an embodiment of the present invention.

이하, 첨부한 도면을 참조하여 본 발명의 일실시예에 따른 임펠러 체결구조(100)에 대하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the impeller fastening structure 100 according to an embodiment of the present invention.

도 2는 본 발명의 일실시예에 따른 임펠러 체결구조의 단면도이고, 도 3은 본 발명의 일실시예에 따른 임펠러 체결구조의 분해사시도이다.2 is a cross-sectional view of the impeller fastening structure according to an embodiment of the present invention, Figure 3 is an exploded perspective view of the impeller fastening structure according to an embodiment of the present invention.

도 2 및 도 3을 참조하면, 본 발명의 일실시예에 따른 임펠러 체결구조(100)는 구동축(110)과 임펠러(120)와 고정부(130)와 체결해제부(140)를 포함한다.2 and 3, the impeller fastening structure 100 according to the embodiment of the present invention includes a drive shaft 110, an impeller 120, a fixing part 130, and a release part 140.

상기 구동축(110)은 회전함으로써 이와 체결되는 임펠러(120)를 회전시키기 위한 부재로서, 직경이 서로 다른 영역으로 구분되는 대경부(111)와 소경부(112)를 포함한다.The drive shaft 110 is a member for rotating the impeller 120 coupled to it by rotating, and includes a large diameter portion 111 and a small diameter portion 112 that are divided into regions having different diameters.

상기 대경부(111)는 후술하는 소경부(112)보다 상대적으로 큰 직경의 실린더 형상으로 마련된다.The large diameter portion 111 is provided in a cylindrical shape of a relatively larger diameter than the small diameter portion 112 to be described later.

상기 소경부(112)는 대경부(111)의 단면으로부터 연장되게 형성되며, 대경부(111)보다 작은 직경을 가지는 실린더 형상으로 마련된다.The small diameter portion 112 is formed to extend from the cross section of the large diameter portion 111, it is provided in a cylindrical shape having a diameter smaller than the large diameter portion (111).

따라서, 구동축(110)은 소경부(112)와 대경부(111)의 직경 차이로 인하여 종단면이 단차진 형상을 가진다.Therefore, the driving shaft 110 has a stepped shape in longitudinal section due to the difference in diameter between the small diameter portion 112 and the large diameter portion 111.

상기 임펠러(120)는 회전하여 유체의 유동을 발생시키는 부재로서 일반적으로 사용되는 임펠러의 형상을 가지며, 중심부에는 상술한 구동축(110)의 소경부(112)가 삽입 또는 수용되기 위한 공간인 관통구(121)가 형성된다. The impeller 120 has a shape of an impeller which is generally used as a member for rotating and generating a flow of the fluid, the through hole which is a space for inserting or receiving the small diameter portion 112 of the drive shaft 110 in the center 121 is formed.

상기 관통구(121)는 임펠러(120)의 중심축 상에서 소정의 내경으로 관통 형성되는 것으로서, 일정한 내경으로 관통되는 구간인 제1관통영역(122)과 임의의 지점을 기준으로 내경이 변화하는 구간인 제2관통영역(123)으로 나눌 수 있다.The through hole 121 is formed to penetrate through a predetermined inner diameter on the central axis of the impeller 120, and a section in which the inner diameter changes based on a predetermined point and the first through region 122, which is a section penetrated by a predetermined inner diameter. It may be divided into the second through area 123.

상기 제1관통영역(122)은 일정한 내경으로 관통되어 상기 소경부(112)가 삽입됨으로써, 내주면이 소경부(112)의 외주면과 접촉하게 되는 구간이다.The first through area 122 is a section through which the inner circumferential surface is in contact with the outer circumferential surface of the small diameter portion 112 by being penetrated with a constant inner diameter to insert the small diameter portion 112.

상기 제2관통영역(123)은 제1관통영역(122)과 동축 상에서 관통 형성되는 것이나, 제1관통영역(122)이 위치한 쪽의 반대방향으로 갈수록 내경이 커짐으로써 테이퍼진(tapered) 형상을 갖는 구간이다. 따라서, 제2관통영역(123)은 구동축(110)을 수용하지만 소경부(112)의 외경보다 큰 내경으로 형성되므로 소경부(112)와 직접 접촉하지 않는다.The second through area 123 is formed to penetrate coaxially with the first through area 122, but has a tapered shape by increasing an inner diameter toward the opposite direction of the side where the first through area 122 is located. It is a section having. Accordingly, the second through area 123 accommodates the drive shaft 110 but is not formed in direct contact with the small diameter portion 112 because it is formed to have an inner diameter larger than the outer diameter of the small diameter portion 112.

한편, 임펠러(120)는 관통구(121)에 소경부(112)를 삽입함으로써 구동축에 임시 체결되며, 임펠러(120)는 구동축(110)에 삽입되는 쪽의 단면이 대경부(111)의 단면과 접촉할 때까지 완전히 삽입된다. On the other hand, the impeller 120 is temporarily fastened to the drive shaft by inserting the small diameter portion 112 in the through hole 121, the impeller 120 has a cross section of the side inserted into the drive shaft 110 is a cross section of the large diameter portion 111 It is fully inserted until it comes into contact with

상기 고정부(130)는 구동축(110)에 임펠러(120)를 견고한 상태로 고정하기 위한 것으로서, 소경부(112)의 외주면과 임펠러(120)의 제2관통영역(123)의 내주면 사이 이격되는 공간에 억지끼움되는 부재이다.The fixing part 130 is for fixing the impeller 120 to the drive shaft 110 in a rigid state, and is spaced apart between the outer circumferential surface of the small diameter part 112 and the inner circumferential surface of the second through area 123 of the impeller 120. It is a member pressed into space.

고정부(130)는 큰 원뿔의 꼭짓점으로부터 길이방향으로 소정의 높이만큼의 작은 원뿔을 제거한 형태를 가지며, 상기 소경부(112)의 외주면을 감쌀 수 있도록 내부에 공간이 형성되고 전면과 후면이 개방된다.The fixing part 130 has a shape in which the small cone as long as a predetermined height is removed from the vertex of the large cone, and a space is formed therein to cover the outer circumferential surface of the small diameter portion 112, and the front and rear sides are open. do.

고정부(130)는 길이방향으로 내경은 일정하게 형성되나, 소경부(112)에 삽입되는 방향의 반대방향으로 갈수록 외경이 점점 커지는 제1고정영역(131)과 소경부(112)에 삽입되지 않는 소정의 지점에서부터 일정한 외경으로 형성되는 제2고정영역(132)을 포함한다.The fixed part 130 has a constant inner diameter in the longitudinal direction, but is not inserted into the first fixed region 131 and the small diameter part 112, the outer diameter of which gradually increases in the direction opposite to the direction in which the small diameter part 112 is inserted. And a second fixed region 132 having a predetermined outer diameter from a predetermined point.

즉, 고정부(130)는 소경부(112)에 삽입되는 영역인 제1고정영역(131)의 외경은 점점 커지고, 소경부(112)에 삽입되지 않고 외부로 노출되는 제2고정영역(132)의 외경은 균일하게 유지된다. That is, the outer diameter of the first fixing region 131, which is the region inserted into the small diameter portion 112, is increased in the fixing portion 130, and the second fixing region 132 exposed to the outside without being inserted into the small diameter portion 112. The outer diameter of) is kept uniform.

고정부(130)에는 제1고정영역(131)의 단부의 임의의 점으로부터 제2고정영역(132)의 단부까지 길이방향을 따라서 절개되는 절개라인(133)이 형성된다. 또한, 고정부(130)는 어느 정도의 탄성력이 있는 재질로 형성됨으로써, 절개라인(133)을 기준으로 양쪽으로 벌어지는 힘을 가하면 변형되어 내경이 커지지만, 인가된 힘을 해제하면 원상태의 내경으로 회복된다.The fixing part 130 is formed with a cutting line 133 which is cut along the length direction from an arbitrary point of the end of the first fixing region 131 to the end of the second fixing region 132. In addition, the fixing part 130 is formed of a material having a certain degree of elasticity, and deforms when the force applied to both sides of the incision line 133 is increased, thereby increasing the inner diameter. Recover.

한편, 제2관통영역(123)에 삽입되지 않는 고정부(130)의 외주면, 즉, 제2고정영역(132)의 외주면에는 제1나사산(134)이 형성되고, 제1나사산(134)은 후술하는 체결해제부(140)의 제2나사산(142)과 치합되어 고정부(130)의 체결을 해제한다.On the other hand, the first screw thread 134 is formed on the outer circumferential surface of the fixing part 130 that is not inserted into the second through region 123, that is, the outer circumferential surface of the second fixing region 132, and the first screw thread 134 is The second screw thread 142 of the fastening release part 140 to be described later is released to release the fastening of the fixing part 130.

고정부(130)는 내경이 소경부(112)의 외경보다 약간 작게 만들어짐으로써, 소경부(112)가 삽입되면 절개라인(133)을 중심으로 탄성 변형하여 소경부(112)의 외주면을 감쌀 수 있을 정도로 내경이 커지게 된다.The fixing part 130 is made of the inner diameter is slightly smaller than the outer diameter of the small diameter portion 112, when the small diameter portion 112 is inserted elastically deformed around the incision line 133 to wrap the outer peripheral surface of the small diameter portion 112 The inner diameter becomes large enough to be able to.

상기 체결해제부(140)는 제2관통영역(132)과 소경부(112)의 사이 공간에 억지끼움 체결된 고정부(130)를 체결해제하기 위한 부재로서, 소정의 길이를 갖는 실린더 형상으로 마련되되, 소경부(112)에 대향되는 면으로부터 원형의 단면을 가지고 내부로 함몰되는 함몰부(141)가 형성된다.The fastening release part 140 is a member for releasing the fastening fastening fastening part 130 in the space between the second through area 132 and the small diameter part 112, in a cylindrical shape having a predetermined length. It is provided, but the depression 141 is formed to have a circular cross section from the surface facing the small diameter portion 112 to be recessed inside.

한편, 함몰부(141)의 내주면에는 제2나사산(142)이 형성되어 제2고정영역(132)에 형성되는 제1나사산(134)과 치합되므로, 함몰부(141)의 내경은 상기 소경부(112)에 결합된 상태에서 제2관통영역(123)의 직경에 대응되도록 고려되어 결정된다.On the other hand, since the second screw thread 142 is formed on the inner circumferential surface of the recess 141 and meshes with the first screw thread 134 formed in the second fixed region 132, the inner diameter of the recess 141 is the small diameter part. It is determined to be considered to correspond to the diameter of the second through area 123 in the state coupled to (112).

한편, 체결해제부(140)가 함몰부(141)에 대향하는 소경부(112) 일단면의 중심에 위치가 고정된 채로 회전할 수 있도록 소경부(112)와 접촉하는 함몰부(141)의 단면에는 소경부(112)측으로 돌출되는 돌출부(143)가 형성된다.On the other hand, the fastening release portion 140 of the depression 141 in contact with the small diameter portion 112 so that the position can be rotated while fixed in the center of the end surface of the small diameter portion 112 facing the depression 141 In the cross section, a protrusion 143 protruding toward the small diameter portion 112 is formed.

따라서, 돌출부(143)가 소경부(112)의 단면에 점접촉 한 상태로 체결해제부(140) 및 제2나사산(142)이 회전함에 따라 이와 치합하는 제1나사산(134)이 체결방향의 반대방향으로 끌려나올때 제2고정영역(132)의 단부가 함몰부(141)에 수용될 수 있을 정도의 깊이로 함몰부(141)가 형성된다.
Accordingly, as the release portion 140 and the second screw thread 142 rotate while the protrusion 143 is in point contact with the end surface of the small diameter portion 112, the first screw thread 134 engaged with the protrusion 143 rotates in the fastening direction. The depression 141 is formed to a depth such that the end of the second fixed region 132 can be accommodated in the depression 141 when drawn out in the opposite direction.

지금부터는 상술한 임펠러 체결구조(100)의 일실시예의 체결 및 체결해제에 대하여 설명한다.The following describes the fastening and unfastening of one embodiment of the impeller fastening structure 100 described above.

먼저, 본 실시예의 임펠러 체결구조(100)의 체결순서에 대해서 설명하면, 소경부(112)를 관통구(121)에 삽입하고, 임펠러(120)의 삽입방향 쪽 단면이 대경부(111)의 단면에 밀착될 때까지 밀어넣음으로써 임펠러(120)는 구동축(110)에 임시 체결된다. 이때, 관통구(121)는 소경부(112)와 열박음으로 결합되는 것이 아니라, 일반적인 끼워맞충의 형태로 결합된다.First, the fastening procedure of the impeller fastening structure 100 of the present embodiment will be described. The small diameter portion 112 is inserted into the through hole 121, and the end surface of the impeller 120 is inserted in the large diameter portion 111. The impeller 120 is temporarily fastened to the drive shaft 110 by pushing until it is in close contact with the end surface. At this time, the through hole 121 is not coupled to the small diameter portion 112 in shrinkage, it is coupled in the form of a general fitting.

임펠러(120) 관통구(121)의 외부로 노출되는 소경부(112)에 고정부(130)를 제1고정영역(131)을 소경부(112) 쪽으로 향하게 하고 끼워넣으면, 소경부(112)의 외경보다 작은 내경으로 형성되는 고정부(130)는 소경부(112)가 삽입되면서 절개라인(133)을 중심으로 양쪽으로 벌어짐으로써 내경 및 직경이 커지게 되고, 소경부(112)의 외주면을 감싸게된다.When the fixing part 130 is inserted into the small diameter part 112 exposed to the outside of the through hole 121 of the impeller 120, the first fixing area 131 is directed toward the small diameter part 112, and the small diameter part 112 is inserted. The fixed portion 130 formed with an inner diameter smaller than the outer diameter of the small diameter portion 112 is inserted into the center of the incision line 133 is widened to both sides, the inner diameter and diameter is increased, the outer peripheral surface of the small diameter portion 112 Wrapped up.

고정부(130)를 소경부(112)와 관통구(121)의 제2관통영역(123) 사이에 형성되는 이격공간에 밀어넣으면, 제2관통영역(123)의 이격공간보다 제1고정영역(131)의 두께가 다소 두껍게 형성되므로 제1고정영역(131)은 제2관통영역(132) 내부에 억지끼움된다. When the fixing part 130 is pushed into the spaced space formed between the small diameter portion 112 and the second through area 123 of the through hole 121, the first fixed area is larger than the spaced space of the second through area 123. Since the thickness of the 131 is somewhat thicker, the first fixed region 131 is forcibly fitted inside the second through region 132.

고정부(130)가 제2관통영역(132)과 소경부(112) 사이의 이격공간내에 억지끼움되면서 임시적으로 결합된 상태를 유지하던 임펠러(120)는 구동축(110)에 견고하게 체결된다. 따라서, 상술한 견고한 결합에 의하여 임펠러(120)는 회전시 오동작 및 구동축(110)으로부터 이탈을 방지할 수 있다.
The impeller 120 that is temporarily held in the spaced space between the second through region 132 and the small diameter portion 112 while being temporarily coupled is firmly fastened to the driving shaft 110. Therefore, the impeller 120 can prevent the malfunction and the deviation from the drive shaft 110 during rotation by the above-described solid coupling.

도 4는 본 발명의 일실시예에 따른 임펠레 체결구조의 체결해제 과정을 개략적으로 도시한 것이다.Figure 4 schematically shows the release process of the impeller fastening structure according to an embodiment of the present invention.

한편, 도 4를 참조하여 구동축(110)과 결합된 임펠러(120)를 체결해제 하는 과정에 대해서 설명하면, 소경부(112)의 단부가 함몰부(141)에 일부 수용하도록 체결해제부(140)를 위치시키고, 제2나사산(142)의 단부와 제1나산사산(134)의 단부가 치합되도록 한다. Meanwhile, referring to FIG. 4, a process of releasing the impeller 120 coupled to the driving shaft 110 will be described. The release portion 140 may be partially accommodated in the recessed portion 141 by the end portion of the small diameter portion 112. ) And the end of the second thread 142 and the end of the first thread 134 is engaged.

제1나사산(134)과 제2나사산(142)이 나사 결합되는 방향으로 체결해제부(140)를 회전시키면, 고정부(130)와 체결되는 체결해제부(140)는 구동축(110) 측으로 위치 이동한다.When the first release thread 134 and the second screw thread 142 are rotated in the direction in which the screw is coupled, the release portion 140 that is coupled to the fixing portion 130 is positioned toward the drive shaft 110. Move.

체결해제부(140)가 이동하여 돌출부(143)의 단부가 소경부(112) 단면의 중심에 접촉하면, 위치가 고정된 채로 회전한다. 위치가 고정된 채로 회전하는 체결해제부(140)에 의하여 고정부(130)는 체결방향의 반대방향으로 끌려나와 체결이 해제되고, 끌려나오는 고정부(130) 단부는 체결해제부(140)의 함몰부 내에 일부 수용된다.When the disengagement part 140 moves so that the end portion of the protruding part 143 contacts the center of the end surface of the small diameter part 112, the fastening part 140 rotates while the position is fixed. The fixing part 130 is pulled in the opposite direction of the fastening direction by the fastening release part 140 which rotates while the position is fixed, and the fastening is released, and the end of the fixed part 130 which is drawn out of the fastening release part 140. Partly housed in the depression.

고정부(130)의 체결이 일부 해제되면, 회전을 정지시키고 고정부(130)와 나사 결합된 체결해제부(140)를 끌어냄으로써. 고정부(130)의 체결을 해제시킨다.When the fastening of the fixing part 130 is partially released, by stopping the rotation and pulling out the unfastening part 140 screwed with the fixing part 130. Release the fastening of the fixing part 130.

마지막으로, 구동축(110)과 체결된 임펠러(120)를 외부로 슬라이딩 이동시킴으로써 체결해제시킬 수 있다. 임펠러(120)가 구동축(110)과 견고하게 고정된 것이 아니라 임시 고정된 상태에 있는 것이므로 큰 힘을 가하지 않고도 쉽게 체결해제를 할 수 있다.
Finally, it can be released by sliding the impeller 120 coupled to the drive shaft 110 to the outside. Since the impeller 120 is not firmly fixed to the drive shaft 110 and is in a temporarily fixed state, the impeller 120 may be easily disengaged without applying a large force.

따라서, 종래의 임펠러 체결구조에 의하면, 열박음에 의하여 체결해제가 어려운 문제가 있었으나, 본 실시예에 의하면 열박음 없이 축과 임펠러를 견고하게 결합시키고 결합해제도 용이하게 할 수 있다.
Therefore, according to the conventional impeller fastening structure, there was a problem that the fastening release is difficult due to shrinkage, according to the present embodiment it can be firmly coupled to the shaft and the impeller without the shrinkage and can also be easily released.

본 발명의 권리범위는 상술한 실시예에 한정되는 것이 아니라 첨부된 특허청구범위 내에서 다양한 형태의 실시예로 구현될 수 있다. 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 누구든지 변형 가능한 다양한 범위까지 본 발명의 청구범위 기재의 범위 내에 있는 것으로 본다.The scope of the present invention is not limited to the above-described embodiment, but may be embodied in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention claimed in the claims, it is intended that any person skilled in the art to which the present invention pertains falls within the scope of the claims described herein to various extents that can be modified.

110 : 구동축 133 : 절개라인
120 : 임펠러 134 : 제1나사산
121 : 관통구 140 : 체결해제부
130 : 고정부 142 : 제2나사산110: drive shaft 133: incision line
120: impeller 134: first screw thread
121: through hole 140: release portion
130: fixing part 142: second screw thread

Claims (6)

대경부와 상기 대경부로부터 연장되고 상기 대경부 보다 작은 직경의 소경부로 구성되는 구동축;
상기 소경부가 삽입되는 관통구가 형성되되, 상기 소경부에서부터 연장되는 대경부의 단면상에 단부가 접촉하는 회전체;
상기 구동축으로부터 상기 회전체의 이탈을 방지하도록 상기 소경부의 외주면과 상기 관통구의 내주면 사이 공간에 삽입됨으로써 억지끼움되되, 외주면을 따라서 제1나사산이 형성되는 고정부;
상기 고정부의 제1나사산과 나사결합 하도록 내주면에 제2나사산이 형성되고, 위치가 고정된 상태에서 상기 제2나사산이 상기 제1나사산과 결합함으로써 삽입되는 방향의 반대방향으로 상기 고정부를 이동시켜 상기 관통구로부터 상기 고정부의 억지끼움을 해제하는 체결해제부;를 포함하는 것을 특징으로 하는 임펠러 체결구조.A drive shaft comprising a large diameter portion and a small diameter portion extending from the large diameter portion and smaller in diameter than the large diameter portion;
A rotating body having a through hole into which the small diameter part is inserted, the end of the rotating body contacting an end surface of the large diameter part extending from the small diameter part;
A fixing part inserted into the space between the outer circumferential surface of the small diameter portion and the inner circumferential surface of the through hole so as to prevent the rotation of the rotating body from the driving shaft, and having a first screw thread formed along the outer circumferential surface;
A second screw thread is formed on an inner circumferential surface to screw the first screw thread of the fixing part, and the fixing part is moved in a direction opposite to the direction in which the second screw thread is inserted by engaging the first screw thread while the position is fixed. And a fastening release portion for releasing the interference fit of the fixing portion from the through hole. 제1항에 있어서,
상기 고정부는 상기 소경부의 외주면을 감싸는 형태로 구성되고, 일단부에서부터 타단부까지 길이방향을 따라서 절개되는 절개라인을 중심으로 양쪽으로 벌어짐으로써 탄성 변형되는 것을 특징으로 하는 임펠러 체결구조.The method of claim 1,
The fixing portion is formed in a form surrounding the outer peripheral surface of the small diameter portion, impeller fastening structure characterized in that it is elastically deformed by opening to both sides around the incision line cut along the longitudinal direction from one end to the other end. 제2항에 있어서,
상기 관통구는 내주면이 상기 소경부와 접촉하는 제1관통영역과 상기 제1관통영역으로부터 연장되어 상기 제1관통영역의 반대방향을 따라서 내경이 점점 커지게 형성되는 제2관통영역을 포함하고,
상기 고정부는 상기 소경부의 외주면과 상기 제2관통영역의 내주면 사이 공간에 삽입되는 것을 특징으로 하는 임펠러 체결구조.The method of claim 2,
The through hole may include a first through area having an inner circumferential surface in contact with the small diameter part and a second through area having an inner diameter gradually increasing along the opposite direction of the first through area, extending from the first through area.
And the fixing part is inserted into a space between an outer circumferential surface of the small diameter portion and an inner circumferential surface of the second through area. 제3항에 있어서,
상기 고정부는 외주면이 상기 제2관통영역의 내주면에 면접촉하도록 상기 소경부에 삽입되는 반대 방향으로 외경이 점점 커지게 형성되는 것을 특징으로 하는 임펠러 체결구조.The method of claim 3,
The fixing part impeller fastening structure, characterized in that the outer diameter is gradually increased in the opposite direction is inserted into the small diameter portion such that the outer peripheral surface is in surface contact with the inner peripheral surface of the second through area. 삭제delete 삭제delete
KR1020100130260A 2010-12-17 2010-12-17 Structure for fixing impeller KR101055801B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362860A (en) * 2012-04-02 2013-10-23 珠海格力电器股份有限公司 High-speed hydrodynamic machine and composition method and assembly method of rotor of high-speed hydrodynamic machine
KR20210109820A (en) 2020-02-28 2021-09-07 주식회사 원키 Distance measuring system between the car and the device
KR20210113732A (en) 2020-03-09 2021-09-17 주식회사 원키 Distance measuring system between time-synchronized car and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0427797A (en) * 1990-05-21 1992-01-30 Tsurumi Mfg Co Ltd Fixing device for impeller
JPH0763193A (en) * 1993-08-23 1995-03-07 Ishikawajima Harima Heavy Ind Co Ltd Impeller installation structure for centrifugal type low temperature compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0427797A (en) * 1990-05-21 1992-01-30 Tsurumi Mfg Co Ltd Fixing device for impeller
JPH0763193A (en) * 1993-08-23 1995-03-07 Ishikawajima Harima Heavy Ind Co Ltd Impeller installation structure for centrifugal type low temperature compressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362860A (en) * 2012-04-02 2013-10-23 珠海格力电器股份有限公司 High-speed hydrodynamic machine and composition method and assembly method of rotor of high-speed hydrodynamic machine
KR20210109820A (en) 2020-02-28 2021-09-07 주식회사 원키 Distance measuring system between the car and the device
KR20210113732A (en) 2020-03-09 2021-09-17 주식회사 원키 Distance measuring system between time-synchronized car and device

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