KR20220027322A - Bush assembly of water pump - Google Patents

Bush assembly of water pump Download PDF

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Publication number
KR20220027322A
KR20220027322A KR1020200107657A KR20200107657A KR20220027322A KR 20220027322 A KR20220027322 A KR 20220027322A KR 1020200107657 A KR1020200107657 A KR 1020200107657A KR 20200107657 A KR20200107657 A KR 20200107657A KR 20220027322 A KR20220027322 A KR 20220027322A
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KR
South Korea
Prior art keywords
shaft
bush
water pump
bush assembly
rings
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KR1020200107657A
Other languages
Korean (ko)
Inventor
박종원
이창국
정연석
김현범
이다빈
Original Assignee
지엠비코리아 주식회사
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Priority to KR1020200107657A priority Critical patent/KR20220027322A/en
Publication of KR20220027322A publication Critical patent/KR20220027322A/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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • 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
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • F05D2210/11—Kind or type liquid, i.e. incompressible
    • 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
    • F05D2240/00—Components
    • F05D2240/55—Seals

Abstract

The present invention relates to a bush assembly and, more specifically, to a bush assembly of an electric water pump, capable of reducing noise and vibrations. In accordance with the present invention, the bush assembly, which is a bush assembly of an electric water pump supporting a shaft of a rotor to a can, includes a cylindrical bearing bush, and a plurality of O-rings. The bearing bush has a plurality of grooves spaced a predetermined distance apart from each other in an axial direction to be formed on an outer circumference surface in a circumferential direction, and a through hole, into which the shaft is inserted to be supported, to be inserted into a groove of the can. The O-rings are made of a flexible material to be inserted into the grooves. In accordance with the present invention, the bush assembly supporting the shaft of the rotor to the can includes the cylindrical bearing bush inserted into the groove of the can and a plurality of O-rings. Here, the bearing bush has the plurality of grooves spaced a predetermined distance apart from each other in an axial direction to be formed on the outer circumference surface in a circumferential direction, and a through hole, into which the shaft is inserted to be supported, and the O-rings are made of a flexible material to be inserted into the grooves. In this case, since the O-rings come in contact with an inner circumference surface of the groove of the can, rotation friction can be reduced, which can lead to less noise and vibrations. Moreover, the shaft can be easily supported even within a general tolerance.

Description

전동식 워터펌프의 부시조립체{Bush assembly of water pump}Bush assembly of water pump

본 발명은 부시조립체에 대한 것으로서, 더욱 상세하게는 진동 및 소음을 줄일 수 있는 전동식 워터펌프의 부시조립체에 관한 것이다. The present invention relates to a bush assembly, and more particularly, to a bush assembly of an electric water pump capable of reducing vibration and noise.

일반적으로, 워터펌프는 엔진의 냉각 및 실내 난방을 위하여 엔진 및 히터에 냉각수를 순환시키기 위한 장치이다. 워터펌프에서 토출된 냉각수는 엔진, 히터, 또는 라디에이터와 열교환을 하며 순환한 후 워터펌프로 다시 유입된다. 이러한 워터펌프는 크게 기계식 워터펌프와 전동식 워터펌프로 나누어 지는데, 엔진 냉각을 최적인 상태에서 컨트롤 하는 것이 가능하고, 엔진 주위의 구조를 간소화하여 차량 연비를 향상시키는 전동식 워터펌프가 널리 사용되고 있다. In general, a water pump is a device for circulating coolant to an engine and a heater for engine cooling and indoor heating. The coolant discharged from the water pump exchanges heat with the engine, heater, or radiator, circulates, and then flows back into the water pump. These water pumps are largely divided into mechanical water pumps and electric water pumps, and electric water pumps that can control engine cooling in an optimal state and improve vehicle fuel efficiency by simplifying the structure around the engine are widely used.

종래의 워터펌프의 경우, 샤프트의 하단을 지지하는 부시베어링은 다이캐스팅 된 캔에 압입되어 장착된다. 이 경우, 정확한 치수로 정밀가공 되어야 하므로 조립이 용이하지 않고, 일반공차에서는 샤프트를 용이하게 지지할 수 없다는 문제점이 있다. In the case of a conventional water pump, a bush bearing supporting the lower end of the shaft is press-fitted into a die-cast can and mounted. In this case, there is a problem that assembly is not easy because it must be precisely machined to exact dimensions, and the shaft cannot be easily supported in general tolerances.

공개특허 제10호-2013-0045504호 (공개일 2013.05.06)Patent Publication No. 10-2013-0045504 (published on May 6, 2013)

본 발명은 상기의 문제점을 해결하기 위한 것이다. 본 발명은 진동 및 소음을 줄일 수 있는 전동식 워터펌프의 부시조립체를 제공하는 것을 목적으로 한다. The present invention is to solve the above problems. An object of the present invention is to provide a bush assembly of an electric water pump capable of reducing vibration and noise.

본 발명에 따른 부시조립체는 로터의 샤프트를 캔에 지지하는 전동식 워터펌프의 부시조립체에 있어서, 원통형의 베어링부시와, 복수개의 오링을 구비한다. 상기 베어링부시는 축방향을 따라 일정간격 이격하여 외주면에 원주방향을 따라 형성된 복수의 홈과, 상기 샤프트가 삽입되어 지지되는 관통공이 형성되어 상기 캔의 홈에 삽입된다. 상기 오링은 유연한 재질로 형성되어 상기 홈에 삽입된다. A bush assembly according to the present invention is a bush assembly of an electric water pump that supports a shaft of a rotor on a can, and includes a cylindrical bearing bush and a plurality of O-rings. In the bearing bush, a plurality of grooves formed along the circumferential direction on an outer peripheral surface of the bearing bushing at regular intervals along the axial direction, and a through hole into which the shaft is inserted and supported are formed, and inserted into the groove of the can. The O-ring is formed of a flexible material and inserted into the groove.

본 발명에 의하면, 로터의 샤프트를 캔에 지지하는 부시조립체는 캔의 홈에 삽입되는 원통형의 베어링부시와 복수개의 오링을 구비한다. 여기서 베어링부시는 축방향을 따라 일정간격 이격하여 외주면에 원주방향을 따라 형성된 복수의 홈과 샤프트가 삽입되어 지지되는 관통공이 형성되고, 오링은 유연한 재질로 형성되어 홈에 삽입된다. 이 경우, 오링이 캔의 홈의 내주면과 접촉하므로 회전 마찰을 감소시켜 소음 및 진동을 줄일 수 있다. 또한, 일반공차내에서도 샤프트를 용이하게 지지할 수 있다. According to the present invention, the bush assembly for supporting the shaft of the rotor to the can includes a cylindrical bearing bush inserted into the groove of the can and a plurality of O-rings. Here, a plurality of grooves formed along the circumferential direction and a plurality of grooves formed in the circumferential direction of the bearing bushing along the axial direction are spaced apart along the axial direction and a through hole in which the shaft is inserted and supported, and the O-ring is formed of a flexible material and inserted into the groove. In this case, since the O-ring is in contact with the inner circumferential surface of the groove of the can, rotational friction is reduced, thereby reducing noise and vibration. In addition, the shaft can be easily supported even within the general tolerance.

도 1은 본 발명에 따른 전동식 워터펌프의 단면도이고,
도 2는 도 1에 도시된 캔의 단면도이고,
도 3은 도 1에 도시된 부시조립체의 단면도이다. 1 is a cross-sectional view of an electric water pump according to the present invention;
Figure 2 is a cross-sectional view of the can shown in Figure 1,
3 is a cross-sectional view of the bush assembly shown in FIG.

도 1 내지 도 3을 참조하여 본 발명에 따른 전동식 워터펌프의 부시조립체의 일 실시예를 설명한다. An embodiment of the bush assembly of the electric water pump according to the present invention will be described with reference to FIGS. 1 to 3 .

본 발명의 일 실시예에 따른 전동식 워터펌프(100)는 하우징(10)과, 캔(15)과, 로터(20)와, 스테이터(25)와, 샤프트(30)와, 임펠러(35)와, 부시조립체(40)를 포함한다. The electric water pump 100 according to an embodiment of the present invention includes a housing 10 , a can 15 , a rotor 20 , a stator 25 , a shaft 30 , an impeller 35 and , and a bush assembly 40 .

하우징(10)은 내부에 캔(15)과 로터(20)와 스테이터(25)를 수용한다. The housing 10 accommodates the can 15 , the rotor 20 , and the stator 25 therein.

로터(20)는 캔(15)의 내경측에 설치되고, 샤트프(30)에 고정결합되어 회전한다. The rotor 20 is installed on the inner diameter side of the can 15 , is fixedly coupled to the shaft 30 and rotates.

스테이터(25)는 캔(15)의 외경측에 고정 설치되고, 전기적 신호에 따라 로터(20)를 회전시킨다. The stator 25 is fixedly installed on the outer diameter side of the can 15 and rotates the rotor 20 according to an electrical signal.

샤프트(30)는 캔(15)의 내부에 장착되어 하단이 중앙 하부에 고정된다. The shaft 30 is mounted inside the can 15 so that the lower end is fixed to the lower center.

임펠러(35)는 워터펌프(100)로 유입되는 유체를 순환시키는 역할을 한다. 이를 위하여 임펠러(35)는 로터(20)에 의해 회전할 수 있도록 캔(15)의 외부로 돌출된 샤프트(30)에 장착된다. The impeller 35 circulates the fluid flowing into the water pump 100 . To this end, the impeller 35 is mounted on the shaft 30 protruding to the outside of the can 15 so as to be rotated by the rotor 20 .

부시조립체(40)는 샤프트(30)를 캔(15)에 지지하는 역할을 한다. 이를 위하여 부시조립체(40)는 베어링부시(41)와 복수개의 오링(45)을 구비한다. The bush assembly 40 serves to support the shaft 30 to the can 15 . To this end, the bush assembly 40 includes a bearing bush 41 and a plurality of O-rings 45 .

베어링부시(41)는 원통형으로 캔(15)의 삽입홈(16)에 삽입되며, 복수의 홈(42)과 관통공(44)이 형성된다. 홈(42)은 축방향을 따라 일정간격 이격하여 외주면에 원주방향을 따라 복수개가 형성되며, 본 실시예에서는 2개의 홈(42)이 형성된다. 관통공(44)은 샤프트(30)의 하단이 삽입되어 지지되도록 관통형성된다. The bearing bush 41 is inserted into the insertion groove 16 of the can 15 in a cylindrical shape, and a plurality of grooves 42 and through holes 44 are formed. A plurality of grooves 42 are formed along the circumferential direction on the outer circumferential surface by being spaced apart from each other at regular intervals along the axial direction, and in this embodiment, two grooves 42 are formed. The through hole 44 is formed so that the lower end of the shaft 30 is inserted and supported.

오링(45)은 유연한 재질로 형성되어 베어링부시(41)의 홈(42)에 삽입되도록 복수개가 구비된다. 본 실시예에서 오링(45)은 2개의 홈(42)에 맞추어 2개가 구비된다. A plurality of O-rings 45 are formed of a flexible material to be inserted into the grooves 42 of the bearing bush 41 . In this embodiment, two O-rings 45 are provided to fit the two grooves 42 .

본 실시예의 경우, 부시조립체(40)는 샤프트(30)의 하단을 지지하도록 캔(15)의 삽입홈(16)에 삽입된다. 이때, 본 실시예의 부시조립체(40)는 베어링부시(41)의 외주면에 형성된 복수의 홈(42)에 오링(45)이 삽입된다. 이 경우, 오링(45)이 캔(15)의 삽입홈(16)의 내주면과 접촉하므로 회전 마찰을 감소시켜 소음 및 진동을 줄일 수 있다. 또한, 일반공차내에서도 샤프트(30)를 용이하게 지지할 수 있다. In this embodiment, the bush assembly 40 is inserted into the insertion groove 16 of the can 15 to support the lower end of the shaft 30 . At this time, in the bush assembly 40 of this embodiment, the O-ring 45 is inserted into the plurality of grooves 42 formed on the outer peripheral surface of the bearing bush 41 . In this case, since the O-ring 45 comes into contact with the inner circumferential surface of the insertion groove 16 of the can 15 , rotational friction is reduced, thereby reducing noise and vibration. In addition, the shaft 30 can be easily supported even within the general tolerance.

반면, 종래의 워터펌프의 경우, 샤프트의 하단을 지지하는 부시베어링은 다이캐스팅 된 캔에 압입되어 장착된다. 이 경우, 정확한 치수로 정밀가공 되어야 하므로 조립이 용이하지 않고, 일반공차에서는 샤프트를 용이하게 지지할 수 없다는 문제점이 있다. On the other hand, in the case of a conventional water pump, the bush bearing supporting the lower end of the shaft is press-fitted into the die-cast can and mounted. In this case, there is a problem that assembly is not easy because it must be precisely machined to exact dimensions, and the shaft cannot be easily supported in general tolerances.

10 : 하우징 15 : 캔
16 : 삽입홈 20 : 로터
25 : 스테이터 30 : 샤프트
35 : 임펠러 40 : 부시조립체
41 : 베어링부시 42 : 홈
44 : 관통공 45 : 오링
100 : 워터펌프10: housing 15: can
16: insertion groove 20: rotor
25: stator 30: shaft
35: impeller 40: bush assembly
41: bearing bush 42: groove
44: through hole 45: O-ring
100: water pump

Claims (1)

로터의 샤프트를 캔에 지지하는 전동식 워터펌프의 부시조립체에 있어서,
축방향을 따라 일정간격 이격하여 외주면에 원주방향을 따라 형성된 복수의 홈과, 상기 샤프트가 삽입되어 지지되는 관통공이 형성되어 상기 캔의 홈에 삽입되는 원통형의 베어링부시와,
유연한 재질로 형성되어 상기 홈에 삽입되는 복수개의 오링을 구비하는 것을 특징으로 하는 전동식 워터펌프의 부시조립체. In the bush assembly of the electric water pump supporting the shaft of the rotor to the can,
A cylindrical bearing bush having a plurality of grooves formed along the circumferential direction on the outer circumferential surface at regular intervals along the axial direction, and through-holes in which the shaft is inserted and supported, and inserted into the grooves of the can;
A bush assembly for an electric water pump, which is formed of a flexible material and includes a plurality of O-rings inserted into the grooves.
KR1020200107657A 2020-08-26 2020-08-26 Bush assembly of water pump KR20220027322A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130045504A (en) 2011-10-26 2013-05-06 현대자동차주식회사 Canned motor type of electric water pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130045504A (en) 2011-10-26 2013-05-06 현대자동차주식회사 Canned motor type of electric water pump

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