• Title/Summary/Keyword: Linear Pump

Search Result 179, Processing Time 0.026 seconds

Analysis of the Dynamic Characteristics of the Underwater Discharge System using a Linear Pump (선형펌프 방식 수중발사 시스템의 동특성 해석)

  • Park, In-Ki;Jung, Chan-Hee
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.8 no.3 s.22
    • /
    • pp.11-17
    • /
    • 2005
  • In this paper, the mathematical model of the underwater discharge system using a linear pump is derived and the suitable opening pattern of a flow control valve which satisfies the discharge performance requirements is obtained through the underwater discharge simulations. The simulation results show that the dynamic characteristics of a projectile are greatly affected by the opening pattern of the flow control valve, however, hardly by the diving depth. It is anticipated that the simulation model can be used to derive the design parameters and analyze the performance of the designed underwater discharge system using a linear pump.

The Design and Analysis of vacuum Pump Driven by Linear Motor (리니어 모터구동 진공펌프 설계 및 해석)

  • 김동수;안영희;이원희;김광영
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2002.05a
    • /
    • pp.680-683
    • /
    • 2002
  • In this paper, it has been investigated that the design and simulation of vacuum pump driven by linear motor. Vacuum pump consists of unified plunger and piston part, coils, inlet valve and outlet valve. Operating principal of vacuum pump show that air is to flow to go inside through the inlet valve when the magnetic force (16N) is exerted, whereas, air is to flow to go outside through outlet valve when spring farce (14.8N) is exerted. The results of simulation. it was turned out that reached vacuum pressure was about -0.55 bar at 150 seconds, magnetic force was loaded with 16 Newton, displacement of actuator was about 8mm.

  • PDF

Design and Analysis of Electromagnetic Pump Using Linear Induction Motor (선형유도전동기를 이용한 전자기펌프의 설계 및 해석)

  • Kim, Chang-Eob;Jeon, Mun-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.19 no.5
    • /
    • pp.68-73
    • /
    • 2005
  • This paper presents the characteristics analysis of an electromagnetic pump using the linear induction motor(LIM). The electromagnetic pump can be used to transfer the molten metals by the electromagnetic force of LIM. The characteristics of the pump are analyzed solving a hydrodynamic equation with an electromagnetic one.

Analysis of the Driving Characteristics in the Magnetic Fluid Linear Pump by Operating Current (동작 전류에 의한 Magnetic fluid Linear Pump의 동특성 해석)

  • Seo, Kang;Park, Gwan-Soo
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.53 no.4
    • /
    • pp.237-246
    • /
    • 2004
  • The advantages of the Magnetic Fluid Linear Pump(MFLP) is that this device could Pump the non-conductive. non-magnetic liquid such as Insulin or blood because of the segregation structure of the magnetic fluid and pumping liquid. In this device. the sequential currents are needed to Produce pumping forces so that Pumping Forces and Pumping speed mainly depend on the current Patterns. The excessive forces at Pumping moment could cause the medical shock, and weak forces at intermediate moment could cause the back flow or the pumping liquid. So the ripples of the pumping forces need to be reduced for the medical application. In this research, the driving characteristics in the MFLP by operating current is analysed. The change of magnetic fluid surface according to the driving currents could be obtained be magneto-hydrodynamic analysis so that Pumping fortes could be computed by integration of the surface moving to the pumping direction at each moment. The actual MFLP with 13mm diameter was made and tested for experiments. The effects of driving current and frequency on the pumping forces and pumping speed were analyzed and compared with experimental measurements.

Characteristics Analysis of Electromagnetic Pump using Linear Induction Motor (선형유도전동기를 이용한 전자기 펌프의 특성해석)

  • 김창업
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.14 no.2
    • /
    • pp.36-42
    • /
    • 2000
  • This paper presents the characteristics analysis of electromagnetic pump using linear induction motors. The electromagnetic pump is designed to transfer the molten metals by the electromagnetic force of linear induction motors. The characteristics f a linear induction motor are analysed by the equivalent circuit method considering the end effects. For the verification of the analysis method, the locked test and load test with molten tin were made. The test results of locked test were compared with the simulations, and the velocity of the load test with molten zinc showed 0.24[m/x] with air gap 30[gap] which is sufficient for transferring molten tin.

  • PDF

A Study on the Experimental Trend Analysis of Underwater Noise Factors in Compressed Water System of the Linear Pump Type (선형펌프방식 압축수 시스템의 실험적 수중소음인자별 경향분석 연구)

  • Yi, Jong-ju;Ahn, Kang-su;Sur, Jong-mu
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.24 no.2
    • /
    • pp.228-236
    • /
    • 2021
  • In order to understand the underwater noise source factor of the linear pump type forced ejection system, a reduced-model compressed water experiment device was developed. The reduced-model compressed water experiment device consists of a reverberation tank, a linear pump type forced ejection device, and an underwater vehicle. The underwater noise source was selected from the hydraulic ram moving speed, the hydraulic ram/piston pipe spacing, the ejection pipe inlet/water ram area ratio, and the number of water ram inlets. The underwater vehicle was ejected into the reverberation tank by the device. The source level was derived from the measured sound pressure. The source level tends to increase as the hydraulic ram/piston tube spacing and the hydraulic ram moving speed increase. The source level tended to increase as the area ratio was increased, but the level was weak. The number of water ram inlet did not affect the source level.

Multiple Brillouin Stokes Generation Utilizing a Linear Cavity Erbium-Doped Fiber Laser

  • AL-Mansoori, Mohammed Haydar;Noordin, Nor Kamariah;Saripan, M. Iqbal;Mahdi, Mohd Adzir
    • Journal of Communications and Networks
    • /
    • v.10 no.1
    • /
    • pp.1-4
    • /
    • 2008
  • This paper reports the design of a multiwavelength fiber laser source that utilizes a linear cavity of hybrid Brillouin/Erbium fiber laser (BEFL). The output power, threshold power and free running cavity modes were investigated against the pump powers. The structure exhibited low threshold operation of 4 mW at 2.3 mW injected Brillouin pump power. The optimization of Brillouin pump wavelength, power and Erbium gain led to a maximum possible number of channels generated. Simultaneous and stable operation of 21 channels with 10.88 GHz channels spacing were obtained from this architecture at 1 mW injected Brillouin pump power and 90 m W Erbium doped fiber pump power in the 1555 nm region.

Pumping-up Current Characteristics of Linear Type Magnetic Flux Pump

  • Chung, Yoondo;Muta, Itsuya;Hoshino, Tsutomu;Nakamura, Taketsune;Ko, Taekuk
    • Progress in Superconductivity and Cryogenics
    • /
    • v.6 no.2
    • /
    • pp.29-34
    • /
    • 2004
  • The linear type flux pump aims to compensate a little bit decremental persistent current of the HTS magnet in NMR and MRI spectrometers. The flux pump mainly consists of DC bias coil, 3-phase AC coil and Nb foil. The persistent current in closed superconductive circuit can be easily adjusted by the 3-phase AC current, its frequency and the DC bias current. In the experiment, it has been investigated that the flux pump can effectively charge the current in the load coil of 543 mH for various frequencies in 18 minutes under the DC bias of 10 A and the AC of 5 $A_{rms}$. The maximum magnitudes of pumping current and load magnet voltage are 0.72 A/min and 20 ㎷, respectively. Based on simulation results by the FEM are proved to nearly agree with experimental ones.

Optimum Design of a Linear Induction Motor for Electromagnetic Pump using Genetic Algorithm (유전알고리즘을 이용한 전자기 펌프용 선형유도전동기의 최적설계)

  • Kim, Chang-Eob;Hong, Sung-Ok
    • Proceedings of the KIEE Conference
    • /
    • 2000.07b
    • /
    • pp.744-746
    • /
    • 2000
  • This paper presents an optimum design of a linear induction motor(LIM) using genetic algorithm(GA). Sequential unconstrained minimization technique(SUMT) is used to transform the nonlinear optimization with constraints to a simple unconstrained problem. The objective functions of LIM such as trust, weight are optimized and the result was applied to the design of linear induction pump.

  • PDF

Research of forming shapes of Magnetic Fluid in tube of Magnetic Fluid Linear Pump (Magnetic Fluid Linear Pump 관내의 자성유체 형상에 관한 연구)

  • Sung, Il-Kwon;Seo, Kang;Park, Gwan-Soo
    • Proceedings of the KIEE Conference
    • /
    • 2005.04a
    • /
    • pp.90-92
    • /
    • 2005
  • Magnetic Fluid Linear Pump(MFLP)는 자성유체의 자기적 성질과 유체의 성질을 이용하여 일반적인 펌프의 기어 대신 자성유체를 이용하여 기계적 진동이나 소음을 최소화한 시스템이다. MFLP는 구조가 간단하고 동작전류에 의해 쉽게 조절할 수 있다. MFLP의 동작전류에 의해 발생한 자기장의 정도에 따라 유연하면서 펌핑력이 높은 동작이 가능하다. 따라서 MFLP를 운전하는데 있어 동작전류의 패턴과 크기, 중첩정도에 따른 펌핑력이 변하게 되며, 이에 따른 자기장과 관내의 자성유체의 형상을 해석하여 유연하고 펌핑력이 높은 MFLP의 운전방식을 개발하고자 하였다.

  • PDF