• 제목/요약/키워드: 워터펌프

검색결과 50건 처리시간 0.026초

침식 마모 손상된 차량용 워터펌프의 성능저하 연구 (Study on the Performance Deterioration of Erosion-corrosion Damaged Automotive Water Pump)

  • 전승원;박찬성;김윤호;이규정
    • 한국안전학회지
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    • 제24권2호
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    • pp.1-6
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    • 2009
  • 침식마모로 인하여 손상되어 차량화재를 유발한 차량용 워터펌프의 성능저하를 CFX프로그램을 이용하여 해석하였다. 손상에 따른 성능저하를 해석하기 위하여, 블레이드의 굽힘 변형과 간극의 증가를 고려하였다. 캐비테이션 해석 시에는 포화증기 발생과 응축 과정을 모델링하기 위하여 Rayleigh-Plesset 모델을 적용하였다.

전동 워터펌프의 열유동 특성 해석에 관한 연구 (A Study on Thermo-flow Characteristics Analysis of Electric Water Pump)

  • 김성철;송형근
    • 한국자동차공학회논문집
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    • 제20권5호
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    • pp.95-101
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    • 2012
  • An electric water pump for engine cooling system has an advantage which particularly in the cold start, the use of the electric water pump saves fuel and leads to a corresponding reduction in emissions. The canned type electric water pump without mechanical sealing elements was selected to meet the requirements for operational reliability and life. However, the electric water pump for internal combustion engine generates much more heat loss than for hybrid electric vehicle since it is operated by the electric power of high current and low voltage. In this study, the fluid flow and thermal characteristics of the canned type electric water pump as an inverter integrated water pump has been investigated under the effects of heat generation. The analysis conditions such as outdoor air temperature of $125^{\circ}C$, water pump speed of 6000 rpm, coolant temperature of $106^{\circ}C$ and coolant flow rate of 120 L/min was used as a standard condition. Therefore, flow fields and temperature distribution inside the water pump were obtained. Also, we checked the feasibility of the canned type for the electric water pump in comparison with the mechanical seal type.

자동차 워터펌프 밸런스 홀 직경이 수력성능 및 축추력에 미치는 영향 (Effects of the Balance Hole Diameter of an Automotive Closed Type Water Pump on Hydraulic Performance and Axial Force)

  • 이기수;허형석;김현철;오창복
    • 한국자동차공학회논문집
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    • 제16권3호
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    • pp.111-117
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    • 2008
  • The aim of this paper was to investigate the fluid dynamic behavior of the automotive closed type water pump with balance hole in order to evaluate and justify its overall hydraulic performance and, in particular to analyze the effects of the balance hole on the reduction of hydraulic flow force of it. The analysis has been peformed by applying the commercial computational fluid dynamics (CFD) code, Fluent, to the solution of the 3-D turbulent flow fields of automotive closed type water pump. The reliability of the employed analysis was demonstrated by the comparison between numerical result and experimental data. Although, hydraulic head of the closed type water pump with 3mm diameter of balance hole decreased by 1.1%, axial flow force was effectively reduced by 13.3%, comparison of it with no hole at design point.

자동차용 워터펌프의 스퀼소음 저감을 위한 영향도분석 (Parametric Study for the Squeal Noise Reduction of an Automobile Water Pump)

  • 김보형;정원영;백홍길;강동진;정진태
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2013년도 춘계학술대회 논문집
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    • pp.492-497
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    • 2013
  • In this study, a parametric study is performed to investigate the squeal noise of an automobile water pump. The squeal noise studied in this paper is generated by the self-excited torsional resonance of the rotating shaft, and this noise is related to the stick-slip phenomenon of the mechanical seal in the water pump. The mechanical seal friction has the characteristics of the negative velocity-gradient. The equations of motion of multiple-degree-of-freedom torsional vibration model is constructed by the Holzer's method and then the equation is transformed to an equivalent single-degree-of-freedom torsional resonance simulation model. A squeal noise criteria is determined by the simulation model to perform the parametric study. The design parameters(the mass moment of inertia of the pulley, the mass moment of inertia of the impeller, the length of the shafts, the radius of the shafts, spinning speed of the shafts, the position of the mechanical seal, radius of the mechanical seal, and normal load of the mechanical seal) are investigated to confirm the stability for the squeal noise.

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자동차 밀폐형 워터펌프의 토출구 형상이 수력성능에 미치는 영향 (Effect of Shape of Discharge Port on Hydraulic Performance of Automotive Closed Type Water Pump)

  • 허형석;이기수;배석정
    • 한국자동차공학회논문집
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    • 제14권1호
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    • pp.39-47
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    • 2006
  • Recent trend in pursuit of high performance and effectiveness for automotive cooling system has changed the application of material for impeller of automotive water pump from metal to high ability engineering resin, which can achieve optimization of design of impeller geometry and realize lightweight high efficiency water pump. Closed type water pump improves hydraulic loss of fluid through the clearance between volute casing and impeller compared with that of the existing open type water pump(Although closed type is heavier than open type for the same size and same material, adoption of plastics can solve the problem.). In the present study, the characteristics of hydraulic performance of closed type water pump were investigated with respect to the angle between shroud and hub of impeller and the shape of discharge port of volute casing. Performance tests were carried out for 4 cases, that is, for 2 impellers and 2 casings. The modification of shape of only discharge port can enhance the hydraulic performance by 10 percent and the pump efficiency by 4-6 percent.

자동차용 워터펌프의 스퀼소음 저감을 위한 영향도 분석 (Parametric Study for the Squeal Noise Reduction of an Automobile Water Pump)

  • 김보형;정원영;백홍길;강동진;정진태
    • 한국소음진동공학회논문집
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    • 제23권7호
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    • pp.624-630
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    • 2013
  • In this study, a parametric study is performed to investigate the squeal noise of an automobile water pump. The squeal noise studied in this paper is generated by the self-excited torsional resonance of the rotating shaft, and this noise is related to the stick-slip phenomenon of the mechanical seal in the water pump. The mechanical seal friction has the characteristics of the negative velocity-gradient. The equations of motion of multiple-degree-of-freedom torsional vibration model is constructed by the Holzer's method and then the equation is transformed to an equivalent single-degree-of-freedom torsional resonance simulation model. A squeal noise criteria is determined by the simulation model to perform the parametric study. The design parameters(the mass moment of inertia of the pulley, the mass moment of inertia of the impeller, the length of the shafts, the radius of the shafts, spinning speed of the shafts, the position of the mechanical seal, radius of the mechanical seal, and normal load of the mechanical seal) are investigated to confirm the stability for the squeal noise.

사물인터넷을 적용한 녹조제거 자동화 시스템 개발 (Development of Automatic Algal Bloom Remover System using IoT)

  • 이현승;유태수;정석태;임순자
    • 전기전자학회논문지
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    • 제22권1호
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    • pp.93-97
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    • 2018
  • 본 논문에서는 자동화 시스템을 이용하여 지속적으로 녹조를 제거하고 워터펌프를 이용하여 산소를 물속에 주입하여 녹조 생성이 잘 이루어지지 않도록 하는 시스템을 개발하였다. 제안한 녹조제거 자동화 시스템은 기계에 부착된 MCU(micro processor unit)를 이용하여 GPS와 초음파센서, 카메라등을 제어함으로 자동조정운행을 할 수 있고, 컨베이어 벨트, 워터 펌프등을 이용하여 녹조를 자동으로 제거할 수 있다. 또한 스마트폰의 어플리케이션과 연동하여 녹조제거 자동화 시스템의 위치를 추적하고 상황에 따라 사용자가 시스템을 직접 운영 할 수 있도록 하였다.

전동식 워터펌프 개발 (Electric Water pump Development)

  • 정세영;곽중희;박범용;정우진
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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    • pp.576-579
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    • 2008
  • The purpose of study is a development of the high reliance electric driven water-pump that fuction is forcing the movement of water using basic design, proto sample and test at the cooling system. It was important to supply a coolant quickly and accurately for the requirement of flow rate at the system when we carried out the designs for BLDC Moter, Controller and water pump(Impeller, Volute Casing, Sealing Device) First, we attained ours purpose that the target efficiency for water pump was over 40% and then we are doing the optimum design for Brushless Motor and Controller that its target is over 55% of efficiency.

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