• 제목/요약/키워드: 밀폐형 워터펌프

검색결과 4건 처리시간 0.018초

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.

전산유체역학을 이용한 워터펌프 축력 저감 (Reduction of the Axial Force of Water Pump Using CFD)

  • 조석현;신동성
    • 한국자동차공학회논문집
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    • 제20권3호
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    • pp.83-87
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    • 2012
  • Computational Fluid Dynamics (CFD) method has been used to investigate the axial force of automotive water pump. As the excessive axial force can make some unexpected problems like impeller interference and coolant leakage we have focused on finding the cause of axial force and its reduction in this paper. First, we have tested the closed type water pump with and without balance hole by the calculation methods. By examining the pressure contour around the impeller, we have found that the axial force arises not only from the pressure difference around shroud but also from the pressure difference around hub. So we have tested two impellers - one is normal open type impeller and the other is open type impeller with modified hub. The results show that the axial force reduction is about 150~200N for normal one and 700N@3000RPM for modified impeller. And the hydraulic efficiency which is important in aspect of engine fuel efficiency is reduced about 6.5% for normal one but increased 4%@3000RPM for modified impeller.

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.

밀폐형 SUS CAN Rotor를 위한 Leak 검사 자동화 시스템 (A Leak Inspection Automation System for Sealed SUS CAN Rotor)

  • 최창민;서수민;신기수;박종원;정연석;유남현
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2019년도 춘계학술대회
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    • pp.406-408
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    • 2019
  • 자동차에 사용되는 전동식 워터펌프에 적용되는 모터는 CANNED TYPE의 모터 구조이다. 모터의 구동 부품인 로터는 플라스틱 사출물의 격벽 구조 내에 위치하며, 부동액에 침수되어 있는 상태로 회전을 하게 된다. 플라스틱 사출물 격벽 구조 외부에 Stator가 위치되어 Rotor가 회전이 가능하도록 한다. Rotor의 구성은 Magnet와 Core, Shaft로 구성되며, Magnet와 Core의 경우 부품 특성상 수분 침투에 부식되는 재질이기 때문에 부품의 기밀 유지는 매우 중요하다. 차량에 장착된 상태에서는 120도의 환경조건에서 구동이 가능하여야 하며, 내부압력이 1 Bar 이상의 압력에도 누수가 없어야 한다. 본 논문에서는 이 조건을 만족하여 개발된 전동식 워터펌프의 불량을 검사하기 위하여 헬륨을 이용한 Leak 검사 자동화 시스템을 설계 및 구현하였다.

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