KR20050026787A - Cooling structure of motor - Google Patents

Cooling structure of motor Download PDF

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Publication number
KR20050026787A
KR20050026787A KR1020030062933A KR20030062933A KR20050026787A KR 20050026787 A KR20050026787 A KR 20050026787A KR 1020030062933 A KR1020030062933 A KR 1020030062933A KR 20030062933 A KR20030062933 A KR 20030062933A KR 20050026787 A KR20050026787 A KR 20050026787A
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KR
South Korea
Prior art keywords
housing
fan cover
cooling
electric motor
fan
Prior art date
Application number
KR1020030062933A
Other languages
Korean (ko)
Inventor
김희태
Original Assignee
오티스 엘리베이터 컴파니
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Priority to KR1020030062933A priority Critical patent/KR20050026787A/en
Publication of KR20050026787A publication Critical patent/KR20050026787A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/12—Machines characterised by means for reducing windage losses or windage noise

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

A cooler structure of an electric motor is provided to enhance cooling efficiency by straightening a fluid path by plural guide pins formed on an inner periphery of a fan cover. A housing(120) includes a stator core(112) and a rotor core(114) therein. A rotational axis(130) is coupled with the rotor core(114). A cooling fan(134) is coupled with one side of the rotational axis(130). A ventilating hole, for emitting external air introduced by a suction hole to a face of the housing(120), is formed on a fan cover(140). A plurality of guide pins(145) are protruded from an inner surface of the fan cover(140) to form a fluid path. The fluid path leads the introduced external air to a direction from the suction hole to the ventilating hole.

Description

전동기의 냉각구조{Cooling Structure of Motor}Cooling Structure of Motor

본 발명은 전동기에 관한 것으로, 더욱 상세하게는 회전축에 장착된 팬의 회전에 의해 발생되는 냉각풍이 하우징의 전체 표면을 따라 지나도록 유도함으로써 전동기의 구동시 하우징 내부에 발생하는 열을 보다 신속하면서도 효과적으로 방출시켜 냉각효율을 향상시킬 수 있도록 하는 전동기의 냉각구조에 관한 것이다.The present invention relates to an electric motor, and more particularly, to induce cooling air generated by the rotation of a fan mounted on a rotating shaft to pass along the entire surface of the housing, thereby quickly and effectively heating heat generated inside the housing when the electric motor is driven. It relates to a cooling structure of the motor to be discharged to improve the cooling efficiency.

도 1은 종래의 전동기의 내부구조를 보인 도면이다. 도시된 바와 같이, 종래의 전동기(10)는 고정자 코어(12) 및 회전자 코어(14)를 내장한 하우징(20), 중심부에 축구멍이 형성되며 하우징(20)의 양단에 결합되는 프런트 엔드 브라켓(22, front-end bracket) 및 리어 엔드 브라켓(24, rear-end bracket), 회전자 코어(14)에 압입되어 엔드 브라켓(22,24)의 축구멍에 끼워짐과 동시에, 베어링(32)에 의해 지지되는 회전축(30)을 포함한다.1 is a view showing the internal structure of a conventional electric motor. As shown, the conventional electric motor 10 has a housing 20 having a stator core 12 and a rotor core 14 formed therein, and a front end having a shaft hole formed at a center thereof and coupled to both ends of the housing 20. It is press-fitted into the bracket 22, the front-end bracket 24, the rear-end bracket 24, the rotor core 14, and fits into the shaft holes of the end brackets 22, 24, and at the same time, the bearing 32 It includes a rotating shaft 30 supported by.

축구멍을 통하여 리어 엔드 브라켓(24)으로부터 소정 길이 돌출된 회전축(30)의 일단에는 냉각풍을 발생시키기 위한 냉각팬(34)이 장착된다. 리어 엔드 브라켓(24)에는 냉각팬(34)을 감싸며 보호하기 위한 팬커버(40)가 장착된다.A cooling fan 34 for generating cooling wind is mounted at one end of the rotating shaft 30 protruding a predetermined length from the rear end bracket 24 through the shaft hole. The rear end bracket 24 is equipped with a fan cover 40 for wrapping and protecting the cooling fan 34.

팬커버(40)는 외부공기의 흡입을 위한 흡입구(42a)를 형성하는 원추형 부재(42)와, 원추형 부재(42)에 용접 등으로 접합되는 원통형 부재(44)로 이루어진다. 원통형 부재(44)는 리어 엔드 브라켓(24)에 고정되며, 팬커버(40)내로 흡입된 외부공기를 하우징(20)의 외주면으로 배출하기 위해 리어 엔드 브라켓(24)과의 사이에 배출구(44a)를 형성한다. 도 2에 도시된 바와 같이, 원통형 부재(44)의 단면은 중공의 원형으로 형성되며, 그 내주면은 평탄하게 이루어져 있다.The fan cover 40 includes a conical member 42 forming a suction port 42a for suction of external air, and a cylindrical member 44 joined to the conical member 42 by welding or the like. The cylindrical member 44 is fixed to the rear end bracket 24 and discharges 44a between the rear end bracket 24 to discharge the outside air sucked into the fan cover 40 to the outer circumferential surface of the housing 20. ). As shown in FIG. 2, the cross section of the cylindrical member 44 is formed in a hollow circle, and its inner circumferential surface is flat.

이하, 종래의 전동기의 냉각구조의 작동 및 작용을 설명한다.Hereinafter, the operation and action of the cooling structure of the conventional electric motor will be described.

전동기(10)에 전원이 인가되면, 회전축(30)과 회전축(30)의 일단에 장착된 냉각팬(34)이 함께 회전한다. 냉각팬(34)의 회전력에 의해 외부공기가 팬커버(40)의 흡입구(42a)를 통해 팬커버(40)내로 흡입되어 와류를 일으켜 배출구(44a)를 통해 하우징(20)의 외주면으로 배출된다. 배출구(44a)를 통해 배출된 외부공기는 도 1의 화살표방향과 같이, 하우징(20)의 외주면을 따라 유동하면서 전동기(10)의 구동시 발생되는 하우징(20) 내부의 열을 방출시키게 된다.When power is applied to the electric motor 10, the rotating shaft 30 and the cooling fan 34 mounted on one end of the rotating shaft 30 rotate together. External air is sucked into the fan cover 40 through the suction port 42a of the fan cover 40 by the rotational force of the cooling fan 34, causing vortex to be discharged to the outer circumferential surface of the housing 20 through the discharge port 44a. . The external air discharged through the outlet 44a flows along the outer circumferential surface of the housing 20 as shown in the arrow direction of FIG. 1, thereby dissipating heat inside the housing 20 generated when the electric motor 10 is driven.

그러나, 이러한 종래의 전동기의 냉각구조에 있어서, 팬의 회전에 의해 팬커버의 배출구를 통해 송풍되는 냉각풍이 하우징의 전체 표면을 따라 유동하는 것이 아니라, 배출구를 통해 배출되는 순간부터 외부로 점차적으로 발산되어 하우징의 표면에서 멀어지게 되므로, 하우징 내부의 열을 효과적으로 냉각시키지 못하는 문제점이 있다. 또한, 이러한 문제로 인해 전동기의 제작시 냉각을 위한 구성요소를 추가로 적용해야 하므로, 제조원가가 상승하게 되는 단점이 있다.However, in the cooling structure of such a conventional electric motor, the cooling wind blown through the outlet of the fan cover by the rotation of the fan does not flow along the entire surface of the housing, but gradually diverges to the outside from the moment of discharge through the outlet. Since it is away from the surface of the housing, there is a problem that does not effectively cool the heat inside the housing. In addition, due to such a problem, since a component for cooling should be additionally applied in manufacturing the electric motor, there is a disadvantage in that the manufacturing cost increases.

본 발명은 이러한 종래기술의 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 회전축에 장착된 팬의 회전에 의해 발생되는 냉각풍이 하우징의 전체 표면을 따라 지나도록 유도함으로써 전동기의 구동시 하우징 내부에 발생하는 열을 보다 신속하면서도 효과적으로 방출시켜 냉각효율을 향상시킬 수 있도록 하는 전동기의 냉각구조를 제공하는 것이다.The present invention is to solve the problems of the prior art, an object of the present invention is to generate a cooling air generated by the rotation of the fan mounted on the rotating shaft to pass along the entire surface of the housing to generate inside the housing when the motor is driven. It is to provide a cooling structure of the electric motor that can release the heat more quickly and effectively to improve the cooling efficiency.

상기 목적을 달성하기 위해, 고정자 코어 및 회전자 코어를 내장하는 하우징, 회전자 코어에 결합되는 회전축, 회전축의 일단에 결합되는 냉각팬, 냉각팬을 감싸며, 흡입구와 흡입구를 통해 흡입된 외부공기를 하우징의 표면으로 배출하기 위한 배출구가 형성된 팬커버를 포함하는 전동기의 냉각구조에 있어서, 팬커버의 내면에는 흡입구로부터 배출구를 향하는 방향으로 흡입된 외부공기의 유로를 형성하기 위한 다수의 가이드핀이 돌출형성되어 있다.In order to achieve the above object, a housing containing a stator core and a rotor core, a rotating shaft coupled to the rotor core, a cooling fan coupled to one end of the rotating shaft, and surrounding the cooling fan, the outside air sucked through the inlet and the inlet In the cooling structure of the electric motor including a fan cover having a discharge port for discharging to the surface of the housing, the inner surface of the fan cover protrudes a plurality of guide pins for forming a flow path of the external air sucked in the direction from the inlet to the outlet Formed.

이하에서는 첨부된 도면을 참조하여 본 발명에 대한 바람직한 실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

도 3은 본 발명에 따른 전동기의 내부구조를 보인 도면이고, 도 4는 도 3의 선Ⅳ-Ⅳ에 따른 팬커버의 단면도이다.3 is a view showing the internal structure of the electric motor according to the present invention, Figure 4 is a cross-sectional view of the fan cover according to the line IV-IV of FIG.

도시된 바와 같이, 본 발명에 따른 냉각구조가 적용된 전동기(100)는 고정자 코어(112) 및 회전자 코어(114)를 내장한 하우징(120), 중심부에 축구멍이 형성되며 하우징(120)의 양단에 결합되는 프런트 엔드 브라켓(122) 및 리어 엔드 브라켓(124), 회전자 코어(114)에 압입되어 엔드 브라켓(122,124)의 축구멍에 끼워짐과 동시에, 베어링(132)에 의해 지지되는 회전축(130)을 포함한다.As shown, the motor 100 to which the cooling structure according to the present invention is applied includes a housing 120 in which the stator core 112 and the rotor core 114 are embedded, and a shaft hole is formed in the center thereof, and The rotating shaft supported by the bearing 132 while being pushed into the front end bracket 122, the rear end bracket 124, and the rotor core 114 to be coupled to both ends and fitted into the shaft holes of the end brackets 122 and 124 ( 130).

축구멍을 통하여 리어 엔드 브라켓(124)으로부터 소정 길이 돌출된 회전축(130)의 일단에는 냉각풍을 발생시키기 위한 냉각팬(134)이 장착된다. 리어 엔드 브라켓(124)에는 냉각팬(134)을 감싸며 보호하기 위한 팬커버(140)가 장착된다.A cooling fan 134 for generating cooling wind is mounted at one end of the rotating shaft 130 protruding a predetermined length from the rear end bracket 124 through the shaft hole. The rear end bracket 124 is equipped with a fan cover 140 for wrapping and protecting the cooling fan 134.

팬커버(140)는 외부공기의 흡입을 위한 흡입구(142a)를 형성하는 원추형 부재(142)와, 원추형 부재(142)에 용접 등으로 접합되는 원통형 부재(144)로 이루어진다. 원통형 부재(144)는 리어 엔드 브라켓(124)에 고정되며, 팬커버(140)내로 흡입된 외부공기를 하우징(120)의 외주면으로 배출하기 위해 리어 엔드 브라켓(124)과의 사이에 배출구(144a)를 형성한다.The fan cover 140 includes a conical member 142 forming an inlet 142a for suction of external air, and a cylindrical member 144 joined to the conical member 142 by welding or the like. The cylindrical member 144 is fixed to the rear end bracket 124, and discharge port 144a between the rear end bracket 124 and the outside air sucked into the fan cover 140 to the outer circumferential surface of the housing 120. ).

도 4에 도시된 바와 같이, 원통형 부재(144)는 그 내주면에 길이방향을 따라 다수의 가이드핀(145)이 돌출되도록 연속적인 요철형상으로 벤딩되어 형성된다. 따라서, 원통형 부재(144)의 내주면에는 상호 인접하는 가이드핀(145)에 의해 형성되는 다수의 직선유로(146)가 원통형 부재(144)의 길이방향, 즉 흡입구(142a)로부터 배출구(144a)를 향하는 방향으로 구비된다.As shown in FIG. 4, the cylindrical member 144 is formed by bending a continuous concave-convex shape such that a plurality of guide pins 145 protrude along the longitudinal direction thereof. Accordingly, a plurality of straight passages 146 formed by guide pins 145 adjacent to each other on the inner circumferential surface of the cylindrical member 144 extend the discharge port 144a from the longitudinal direction of the cylindrical member 144, that is, the inlet 142a. In the facing direction.

바람직하게는, 다수의 가이드핀(145)은 방사상으로 상호 대칭되게 배치된다. Preferably, the plurality of guide pins 145 are arranged radially symmetric with each other.

이하에서는, 상기와 같이 구성된 본 발명에 따른 전동기의 냉각구조의 작동 및 작용효과를 설명한다.Hereinafter, the operation and operation effects of the cooling structure of the electric motor according to the present invention configured as described above will be described.

전동기(100)에 전원이 인가되면, 회전축(130)과 회전축(130)의 일단에 장착된 냉각팬(134)이 함께 회전한다. 냉각팬(134)의 회전력에 의해, 팬커버(140)의 흡입구(142a)를 통해 외부공기가 팬커버(140)내로 흡입된다. 흡입된 외부공기는 다수의 가이드핀(145)에 의해 팬커버(140)의 원통형 부재(144) 내주면에 길이방향을 따라 형성된 다수의 직선유로를 흐르게 되므로, 외부공기의 유동이 직선화될 뿐만 아니라, 유동속도도 상승된다. 따라서, 도 3의 화살표로 도시한 바와 같이, 팬커버(140)의 배출구(144a)를 통해 배출되는 냉각풍은 하우징(120)의 외주면 전체를 따라 유동하게 됨으로써, 하우징(120)과의 접촉면적이 증가되므로 전동기(100)의 구동시 발생되는 하우징(120) 내부의 열을 보다 효과적으로 방출시킬 수 있게 된다.When power is applied to the electric motor 100, the rotating shaft 130 and the cooling fan 134 mounted at one end of the rotating shaft 130 rotate together. External air is sucked into the fan cover 140 through the suction port 142a of the fan cover 140 by the rotational force of the cooling fan 134. Since the suctioned outside air flows through a plurality of straight paths formed along the longitudinal direction on the inner circumferential surface of the cylindrical member 144 of the fan cover 140 by the plurality of guide pins 145, the flow of the outside air is not only linearized, The flow rate also rises. Therefore, as illustrated by the arrow of FIG. 3, the cooling wind discharged through the outlet 144a of the fan cover 140 flows along the entire outer circumferential surface of the housing 120, thereby making contact with the housing 120. Since this is increased, it is possible to more effectively release the heat inside the housing 120 generated when the electric motor 100 is driven.

본 발명을 상기 실시예에 의해 구체적으로 설명하였지만, 본 발명은 이에 의해 제한되는 것은 아니고, 당업자의 통상적인 지식의 범위 내에서 그 변형이나 개량이 가능하다.Although this invention was demonstrated concretely by the said Example, this invention is not restrict | limited by this, A deformation | transformation and improvement are possible within the range of common knowledge of a person skilled in the art.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 전동기의 냉각구조에 있어서, 회전축에 장착된 냉각팬의 회전에 의해 발생되는 냉각풍이 팬커버내를 통과할 때 팬커버의 내주면에 형성된 다수의 가이드핀에 의해 유동이 직선화되고, 유동속도가 증가되어, 하우징의 표면 전체를 따라 유동하도록 유도함으로써 전동기의 구동시 하우징 내부에 발생하는 열을 보다 신속하면서도 효과적으로 방출시켜 냉각효율을 향상시킬 수 있는 효과가 있다. 더욱이, 전동기의 제작시 냉각을 위한 구성요소를 추가로 적용해야 할 필요가 없으므로, 제조원가의 상승을 억제할 수 있는 이점이 있다.As described in detail above, in the cooling structure of the electric motor according to the present invention, a plurality of guide pins formed on the inner circumferential surface of the fan cover when the cooling wind generated by the rotation of the cooling fan mounted on the rotating shaft passes through the fan cover. As a result, the flow is straightened, and the flow speed is increased to guide the flow along the entire surface of the housing, thereby releasing heat generated inside the housing more quickly and effectively when the motor is driven, thereby improving cooling efficiency. Furthermore, since there is no need to additionally apply components for cooling at the time of manufacturing the electric motor, there is an advantage that can increase the manufacturing cost.

도 1은 종래의 전동기의 내부구조를 보인 도면,1 is a view showing the internal structure of a conventional electric motor,

도 2는 도 1의 선Ⅱ-Ⅱ에 따른 팬커버의 단면도,2 is a cross-sectional view of the fan cover according to the line II-II of FIG.

도 3은 본 발명에 따른 전동기의 내부구조를 보인 도면,3 is a view showing the internal structure of the electric motor according to the present invention;

도 4는 도 3의 선Ⅳ-Ⅳ에 따른 팬커버의 단면도.4 is a cross-sectional view of the fan cover of FIG. 3-IV.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100: 전동기100: electric motor

120: 하우징120: housing

122: 프런트 엔드 브라켓122: front end bracket

124: 리어 엔드 브라켓124: rear end bracket

130: 회전축130: axis of rotation

134: 냉각팬134: cooling fan

140: 팬커버140: fan cover

145: 가이드핀145: guide pin

146: 직선유로146: straight path

Claims (1)

고정자 코어 및 회전자 코어를 내장하는 하우징, 상기 회전자 코어에 결합되는 회전축, 상기 회전축의 일단에 결합되는 냉각팬, 상기 냉각팬을 감싸며, 흡입구와 상기 흡입구를 통해 흡입된 외부공기를 상기 하우징의 표면으로 배출하기 위한 배출구가 형성된 팬커버를 포함하는 전동기의 냉각구조에 있어서,A housing having a stator core and a rotor core embedded therein, a rotating shaft coupled to the rotor core, a cooling fan coupled to one end of the rotating shaft, and enclosing the cooling fan; In the cooling structure of the electric motor including a fan cover having a discharge port for discharging to the surface, 상기 팬커버의 내면에는 상기 흡입구로부터 상기 배출구를 향하는 방향으로 상기 흡입된 외부공기의 유로를 형성하기 위한 다수의 가이드핀이 돌출형성되어 있는 것을 특징으로 하는 전동기의 냉각구조.Cooling structure of the electric motor, characterized in that the inner surface of the fan cover protrudes a plurality of guide pins for forming the flow path of the suctioned external air in the direction from the inlet to the outlet.
KR1020030062933A 2003-09-09 2003-09-09 Cooling structure of motor KR20050026787A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003241A1 (en) * 2013-02-27 2014-08-28 Sew-Eurodrive Gmbh & Co Kg Shroud integrated motor, has shroud for axially extending against inside of hood, where shroud is provided with inner fins, which comprise shoulder on which motor housing is abutted and fins fed airflow produced by fan along housing
CN105179270A (en) * 2015-11-06 2015-12-23 中国船舶重工集团公司第七0四研究所 Air compression structure suitable for positive and reverse rotation external air-cooled motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003241A1 (en) * 2013-02-27 2014-08-28 Sew-Eurodrive Gmbh & Co Kg Shroud integrated motor, has shroud for axially extending against inside of hood, where shroud is provided with inner fins, which comprise shoulder on which motor housing is abutted and fins fed airflow produced by fan along housing
CN105179270A (en) * 2015-11-06 2015-12-23 中国船舶重工集团公司第七0四研究所 Air compression structure suitable for positive and reverse rotation external air-cooled motor

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