• 제목/요약/키워드: Spiral grooved seal

검색결과 9건 처리시간 0.036초

나선 홈 펌프 실의 누설 및 로터다이내믹 해석 (Leakage and Rotordynamic Analysis of Spiral-Grooved Pump Seal Based on Three-Control-Volume Theory)

  • 하태웅;이안성
    • 한국유체기계학회 논문집
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    • 제6권1호
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    • pp.14-22
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    • 2003
  • In this paper the leakage prediction md rotordynamic analysis of an annular seal with a smooth rotor and spiral-grooved stator is performed. For the development of a theoretical model, the three-control-volume analysis of the circumferentially-grooved seal is expanded by considering pressure reduction due to the pumping effect of spiral groove and pressurized flow through the spiral groove. Validation on the present analysis is achieved by comparisons with available experimental data. For the leakage prediction the present analysis generally shows a reasonable agreement with experimental results. Rotordynamic coefficients for rotor speed with spiral angles show same trend, but the magnitudes of rotordynamic coefficients yield differences between analysis and experimental results.

나선 홈 펌프 시일의 특성 해석 (Characteristic Analysis of Spiral-Grooved Pump Seal)

  • Ha, Tae-Woong;Lee, An-Sung
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 추계학술대회논문초록집
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    • pp.379.1-379
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    • 2002
  • In this paper the leakage prediction and rotordynamic analysis of an annular seal with a smooth rotor and spiral-grooved stator are performed. For developing a theoretical model, the three-control-volume analysis of the circumferentially-grooved seal is expanded by considering pressure reduction due to the pumping effect of spiral groove and pressure flow through the spiral groove. Validation to the present analysis is achieved by comparisons with available experimental data. (omitted)

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나선 홈 펌프 시일의 특성 해석 (Characteristic Analysis of Spiral-Grooved Pump Seal)

  • 하태웅;이안성
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2002년도 추계학술대회논문집
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    • pp.799-804
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    • 2002
  • In this paper the leakage prediction and rotordynamic analysis of an annular seal with a smooth rotor and spiral-grooved stator are performed. For developing a theoretical model, the three-control-volume analysis of the circumferentially-grooved seal is expanded by considering pressure reduction due to the pumping effect of spiral groove and pressure flow through the spiral groove. Results by the present analysis are compared with available experimental data. For leakage the analysis results generally show a reasonable agreement to the experimental results. For rotordynamic coefficients the analysis results show the same trend as the experimental results for rotor speed with spiral angles, but their magnitudes show somewhat large deviations.

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Spiral Groove Seal의 靜特性에 관한 연구 (A Study on the Static Characteristics of Spiral Grooved Seals)

  • Yang, Bo-suk;Iwatsubo, Takuzo
    • Tribology and Lubricants
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    • 제2권1호
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    • pp.30-38
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    • 1986
  • In the paper, static characteristics of spiral grooved seal is theoretically obtained by Using Navier-Stokes equation. In the analysis, inertia term of fluid is considered and the flow and pressure in the steady state are obtained for the groove direction and vertical to the groove direction. As the journal rotating frequency increases, the leakage flow decreases. Therefore, zero net leakage flow is possible at the region of some rotating frequency.

마모 실 홈 형상이 펌프 성능에 미치는 영향에 관한 실험적 연구 (An experimental study on influence of wearing seal groove shape to performance of the pump)

  • 김준호
    • Journal of Advanced Marine Engineering and Technology
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    • 제38권3호
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    • pp.285-291
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    • 2014
  • 본 논문은 펌프에서 비접촉식 실로 사용되는 홈 실 적용에 의한 누설 손실을 줄임으로서 고성능 원심펌프의 효율 향상에 관한 것이다. 경사 및 평형 홈 로터와 스테이터의 조합을 포함한 홈 실 형상의 다양한 조합을 실험적으로 연구하였다. 그리고 관련해서 수력성능 및 축추력의 크기를 10가지 케이스에 대하여 측정하고 계산하였다. 그 결과로부터 로터와 스테이터 양쪽 모두에 나선 홈 실(나선 각 : $0.98^{\circ}$)을 가지는 타입이 가장 효과적임을 알 수 있었다. 이 경우 설계 유량($340m^3/h$)에서 기존 설계보다 양정과 효율은 각각 2.1%와 2.3% 향상 되었고 축추력은 10% 감소 되었다.

스파이럴 그루브 스러스트 베어링의 부하용량 향상을 위한 설계 변수에 대한 연구 (A Study on Design Parameters to Improve Load Capacity of Spiral Grooved Thrust Bearing)

  • 강지훈;김경웅
    • Tribology and Lubricants
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    • 제18권3호
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    • pp.181-186
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    • 2002
  • A numerical analysis is undertaken to show the influence of bearing design parameters on the load capacity of air lubricated spiral grooved thrust bearing. The governing equation derived from the mass balance is solved by the finite difference method. Optimal values for various design parameters are obtained to maximize the load capacity. The design parameters are the groove angle, the groove width ratio, the groove height ratio, and the seal ratio.

스파이럴 그루브 형상의 스러스트 베어링의 부하용량 향상을 위한 설계 변수에 대한 연구 (A Study on Design Parameters to Improve Load Capacity of Spiral Grooved Thrust Bearing)

  • 강지훈;김경웅
    • 한국윤활학회:학술대회논문집
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    • 한국윤활학회 2001년도 제33회 춘계학술대회 개최
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    • pp.257-262
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    • 2001
  • A numerical analysis is undertaken to show tile influence of bearing design parameters on tile load capacity of air lubricated spiral grooved thrust bearing. The governing equation derived from the mass balance is solved by the finite difference method. Optimal values for various design parameters are obtained to maximize the load capacity. The design parameters are the groove angle, the groove width ratio, the groove height ratio, arid the seal ratio.

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고성능 하드 디스크 드라이브 개발을 위한 유체베어링 스핀들 모터의 특성분석(현장개발사례: SAMSUNG HDD ′SPINPOINT POLARIS SERIES′) (Experimental Characterization of Hydrodynamic Bearing Spindle Motor for High Performance Hard Disk Drive)

  • 손영;황태연;한윤식;강성우
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2001년도 춘계학술대회논문집
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    • pp.930-935
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    • 2001
  • The experimental characterization of hydrodynamic bearing spindle motor is performed for the practical implementation of high-performance hard disk drive system. Firstly, the design concept of hydrodynamic bearing for the disk drive system is addressed including the herringbone grooved journal bearing, the spiral grooved thrust bearing, capillary seal design, and the viscous pumping of fluid. Secondly, the experimental evaluation is performed for the disk drive system in which the hydrodynamic bearing spindle motor is implemented and its dynamic performances are compared with conventional ball-bearing spindle motor. The key parameters include NRRO(Non Repeatable Run-Out), disk dynamics, acoustics, and resultant PES (Position Error Signal). Finally, the external gyro-exciting test results including 200k CSS(Continuous Start-Stop) on three angular attitudes(0,90, 180 degree) are presented in order to verify the practical reliability of disk drive system subject to the gyro-motion of hydrodynamic bearing spindle motor.

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