• Proceedings of the SAREK Conference
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• 2004.06a
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• pp.136-136
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• 2004

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.4-4
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• 2007

• Tribology and Lubricants
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• v.4 no.1
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• pp.74-80
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• 1988

For an analytic investigation on the dynamic behaviour of the eccentric piston and roller in the cylinder of small rotary vane compressors the hydrodynamic lubrication theory is opplied, analogous to the dynamic analysis of a engine bearing. An adequate modification of the equation of journal motion permits stable convergencies of the numeric calculation of the journal orbits. The increase of the outer diameter of the roller and the eccentricity of the piston gives a relative large decrease of the minimum gap between the roller and cylinder.

• KSTLE International Journal
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• v.1 no.2
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• pp.113-117
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• 2000

The rotary-vane compressor has become one of the most successful types of compressors because of its mechanical reliability, compactness, and adaptability to moderately high-speed operation in virtually an unlimited range of sizes. However recently, the depletion of the ozone layer due to the current refrigerant(R22) has been getting worse, and it is one of the world's pressing issues. In this paper, we will discuss the use of R410a in the compressor of a room air-conditioner as an alternative refrigerant and air-conditioning system to R22, since R410a has greater refrigerant characteristics than R22. Miniaturization of the rotary compressor for the new refrigerant and air-conditioning system is also possible, which reduces the prime cost of production, hence R410a is naturally a better refrigerant. But to apply the new HFC refrigerant system in refrigeration and air-conditioning systems, a significant redesign of the current refrigerant system is also required, because as the refrigeration changes, lubrication characteristics vary. Close attention must be paid to friction force and energy loss due to friction and wear at many sliding areas.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.3 no.3
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• pp.11-16
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• 2004

In this study, the characteristics of signals such as acoustic emission, vibration amplitude and noise level which are derived from the abnormal condition of compressor are investigated. The normal condition, vane stick sound and roller defect condition are chosen to analyze the signal in each cases. From the feature extraction of each signals, the dominant parameters of each signals which can identify the abnormal condition are suggested.

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.45-45
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• 2006

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1991.06a
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• pp.55-59
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• 1991

실중적으로 하중을 받는 선접촉부의 윤활명성은 johnson chart, 또는 Hooke의 Chart에서 나타난바와 같이 강체$\cdot$점도일정명감 (Rigid-Isovicosity region), 점도변화 명성 (Elasticity-Variable Viscosity Region), 탄성체$\cdot$점도일정명성 (Elasticity-Isoviscosity Region)으로 분산 되어지는데 명성내에서 2차원 선접촉의 경우 탄성 파라메터 ge가 적고 점성 파라미터 gv가 큰 Tribology적인 실제 문제가 많은데 비하여 이 점성에서의 윤활특성에 관한 수치적인 Simulation이나 실험적인 보고가 거의 없는 실정이다. 예를들면 engine의 Piston Ring과 Cylinder 간의 윤활, Vane 식의 유압펌프등에서 볼수 있는 습동부의 윤활, Rotary Engine의 Rotor 선단부분, Rotary Compressor의 Rotor와 stator간의 상대운동 점성에서 나타나는 Tribology적인 점성은 대부분이 강체$\cdot$점도 변화점성이거나 그에 바로 인접한 탄생체$\cdot$점도 변화의 초기 점성에 분포하고 있다.

• Journal of the Korean Society for Nondestructive Testing
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• v.18 no.1
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• pp.17-26
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• 1998

The specimen with the wear between a roller and a vane and a normal specimen are classified by AE signal pattern recognition method with a neural network classifier in airconditioning operation test. Also the specimen with the scoring between a shaft and a bearing and a normal specimen are classified by the same method. As the internal pressure increases, the wear between the roller and the vane increases. The different pairs of oils and refrigerants five the effect on the wear.