• Title/Summary/Keyword: Compressor case

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A study on development of automatic welding system for compressor ease using vision sensor (시각센서를 이용한 비원형 압축기 케이스의 자동용접시스템 개발에 관한 연구)

  • 박현준;유제용;나석주;홍성준;강형식
    • Journal of Welding and Joining
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    • v.14 no.5
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    • pp.78-86
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    • 1996
  • Vision sensor was used to track the weld line of the compressor case. The compressor case was fixed in jig equipped with the rotating system, and two torches having one degree of freedom was applied in automatic welding system. The radius of rotation for the compressor case is varying with each rotating angle, while, the angle velocity is constant Therefore, an algorithm to extract the feature of the compressor case for varying rotation angle is needed. To over come the avove difficulties, the curve fitting and composite curve were used. The experiment to verify the proposed algorithm showed desirable results for tracking the welding line of compressor case.

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An Experimental and Numerical Study on Centrifugal Compressor Noise (원심압축기 소음측정과 계산에 관한 연구)

  • Sun, Hyo-Sung;Eom, Seung-Sin;Shin, Hyung-Ki;Lee, Soo-Gab
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.11a
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    • pp.119-124
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    • 2000
  • The 3-stage centrifugal compressor is used in order to measure the noise spectra of compressor, and analyze the results. Two cases are investigated for compressor noise components. Case I includes total system such as compressor, inter-cooler, motor, and Case II excludes cooling system. BPF tonal noise is important in compressor, and cooling system including inter-cooler contributes to broadband noise. Also, motor, gear box, and motor cooling fan are the second contributions to total compressor noise. Centrifugal compressor flow-field is calculated using two-dimensional grid and Navier-Stokes equations. Static pressure increases, and total pressure decreases, as air passes through the compressor components.

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Numerical Performance Analysis of the Swing Compressor (스윙 압축기의 수치해석적 성능평가)

  • Moon, Seok-Hwan;Noh, Ki-Youl;Sa, Bum-Dong;Yang, Jang-Sik;Choi, Gyung-Min;Kim, Duck-Jool
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.1
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    • pp.77-84
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    • 2012
  • Numerical performance analysis of the vane-roller integral type swing compressor was conducted. The swing compressor has been investigated for the highly efficient air conditioning system. Performance analysis results of the swing compressor were compared with those of a conventional rotary compressor. Mechanical and gas losses of a swing compressor were larger than those of a rotary compressor. However in case of mass flow rate from the discharge port, the swing compressor was about 6.68% higher than the rotary compressor. Hence the EER, the cooling capacity and the compressor work of the swing compressor were about 3.71%, 6.69% and 2.90% higher than the rotary compressor respectively.

Numerical Analysis on the Performance Prediction of a Centrifugal Compressor with Relative Positions of Tandem Diffuser Rows (텐덤 디퓨저의 상대 위치에 따른 원심압축기 성능 예측)

  • Noh, Jun-Gu;Kim, Jin-Han
    • 유체기계공업학회:학술대회논문집
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    • 2003.12a
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    • pp.469-475
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    • 2003
  • The performance of a centrifugal compressor composed of an impeller, tandem diffuser rows and axial guide vanes has been predicted numerically and compared with available experimental results on its design rotational speed. The pitchwise-averaged mixing plane method was employed for the boundaries between rotor and stator to obtain steady state solutions. The overall characteristics showed differently according to the relative positions of tandem diffuser rows while the characteristics of impeller showed almost identical. The numerical results agree with the measured data in respect of their tendency. It turned out that 0% of relative positions is the worst case in terms of static pressure recovery and efficiency. According to the experimental results, some pressure fluctuations and malfunction of the compressor were observed for 75% case. However, this numerical calculation using mixing plane method did not capture any of those phenomena. Thus, unsteady flow calculation should be performed to investigate the stability of the compressor caused by different diffuser configuration.

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Study on Deformation Analysis of Holes during Drilling of Aircraft Engine Compressor Cases (항공기 엔진 압축기 케이스의 드릴링 시 홀의 변형 해석에 관한 연구)

  • Park, Ki-Beom;Cho, Young-Tae;Jung, Yoon-Gyo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.3
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    • pp.65-70
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    • 2018
  • M152, used for aircraft engine compressor cases, causes many problems in the cutting process due to its high hardness and high toughness. Characterized by a concave cylindrical center, aircraft engine compressor cases are thin but have multiple side holes to connect with internal parts. Thus, deformation occurs despite the jig sustaining the inside. The object of this study was to lessen the deformation arising from drilling by improving the drilling jig for aircraft engine compressor cases. To this end, an aircraft engine compressor case modeled with SolidWorks was analyzed with ANSYS under real conditions. Then, to secure reliability, the analyzed deformation was compared with the actual deformation. Based on the results, the effects of the improved drilling jig for aircraft engine compressor cases were verified.

Performance Test for a Centrifugal Air Compressor (원심형 공기압축기 성능시험)

  • 신유환;안이기;김광호;손병진
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.8
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    • pp.1964-1971
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    • 1995
  • In the present study, the performance characteristics of a centrifugal air compressor were investigated experimentally. The PC controlled performance test facility for a centrifugal air compressor driven by an electric motor with a gear box to achieve higher compressor rotating speed was set up in the present study. The performance test for a turbocharger compressor of a diesel engine was conducted, and in a case of 34,800 rpm, pressure ratio 1.18, flow rate 0.09kg/s, compressor efficiency 61% were investigated. Adiabatic power for a tested compressor showed maximum value at mass flow ratio 0.8. The value of mass flow ratio of maximum efficiency was about 0.37, it was independent of compressor rotating speed.

Research of Real-Time Remote Operation for Quality Improvement of the Air-compressor : Case Study of Reciprocating Air-compressor (공기압축기의 품질향상을 위한 실시간 원격 운영시스템 연구 : 왕복동형 공기압축기 대상으로)

  • Im, Sang-Don;Kim, Jong-Rae
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.37 no.1
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    • pp.33-40
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    • 2014
  • Air compressor is an important facility with electric power in the industry. However, because of the noise and vibration of air compressor and is installed outside the building management difficulty. In this study, MCP (Micro Control Processor) to remote monitoring of the air compressor via the compressed air through improved quality and allows stable maintenance were designed. So, increase the productivity improvement of energy-saving effect can be obtained. Remote real-time information stored on your PC to manage air compressor equipment was higher reliability. Monitoring system is developed in this study was applied to embedded systems. It is easy to install air compressor, and low maintenance costs was to raise the economic impact.

The search for relations betwwen compressor noise and refrigerator noise (압축기소음과 냉장고소음의 관계 규명 (압축기 정음화에 의한 냉장고 정음화))

  • 유원희;백충국;송진환
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1996.10a
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    • pp.32-36
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    • 1996
  • Noise radiated from refrigerator is mainly decided by compressor noise. If the compressor is silent then the refrigerator could be silent. But In some case this tendency is not true. Because there is uncertain relations between compressor noise and refrigerator noise. And the refrigerator noise is affected by the cycle-matching in the refrigerating system using compressor. In this research it was studied that the compressor noise which didn't affect some refrigerator models could affect other refrigerator models. The methods which could reduce the refrigerator noise was studied and ultimately the methods which could change the characteristics of compressor noise was presented.

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냉장고 및 냉응용기용 compressor motor의 국산화

  • 김회수
    • 전기의세계
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    • v.26 no.2
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    • pp.19-20
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    • 1977
  • 근래 국민생활수준의 향상에 따라 일반가정에서 필수품으로 애용되고 있는 전기냉장고와 상품용 청량음료, 식품등의 보관에 널리 이요오디는 Show case, ice cream stocker등 냉응용기의 수요가 날로 증대되어 왔고, 이들 제품의 핵심부품인 Compressor의 도입량도 매년 증가되고 있으며 국내가전업계에서 도입하는 부품의 비중으로 볼 때 상당한 부담을 안고있는것으로 간주된다. 당사에서는 그동안 도입에만 의존하던 compressor의 국산화에 착수하여 여러가지 우려곡적을 격은 결과 국산개발을 성공리에 완수하고 제품의 국산화 비율을 높이는 등 여러 측면에서 지대한 성과를 거두었다. 본고에서는 당사의 Compressor국산화 작업에 부수하였던 제반 문제점들을 열거하므로써 국내업계에 조금이나마 도움이 되었으면 한다.

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TURBO TYPE AIR COMPRESSOR DESIGN FOR LOW VIBRATION LEVEL (저진동을 위한 터보형 공기압축기의 설계)

  • Kim, Myeong-Kuk;Jung, Yong-Soo;Park, No-gill
    • 유체기계공업학회:학술대회논문집
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    • 1998.12a
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    • pp.159-165
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    • 1998
  • Bearing design of turbo type geared centrifugal air compressor for low vibration level has been studied. The Transfer Matrix Method was used in this paper to analyze the air-compressor consisting of impellers, multi-stage geared rotors, and oil-film hearings. We have to consider this air-compressor as multi-geared rotating system, because characteristics of rotor-bearing system are different from conventional characteristics of non-rotating system. From the view point of Rotordynamics, the stiffness and damping coefficient of oil-film bearing in case of compressor system are more sensitive than other design parameters such as shaft length, shaft diameter and the weight of impellers, etc. Therefore, the stiffness and damping coefficients on each bearing were considered as design parameters. As the result of this study, turbo type air compressor with low vibration level can be achieved.

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