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최종식(Jong-Sik Choi),이기천(Gi-Chun Lee),최병오(Byung-Oh Choi),전준완(Jun-Wan Jeon),장무성(Mu-Seong Chang),서재영(Chae-Young Suh) 대한기계학회 2018 大韓機械學會論文集A Vol.42 No.6
정량펌프는 모터로 구동되며, 펌프 내에 공급된 원액을 혼합 장치부로 전달한다. 본 연구에서는 정량펌프의 시험시간을 계산하기 위해서 무고장시험 기법을 적용하였으며, 시험시간 단축을 위해 가속인자가 압력인 가속수명시험 기법을 적용하였다. 또한 정량펌프의 개선 전후 제품에 대한 신뢰성 시험데이터의 통계적 분석을 통하여 정량펌프의 와이블 분포의 형상모수는 유사하고, 특성수명 및 B5 수명은 개선 후 제품에서 증가함을 알 수 있었다. 가속수명시험 기법을 적용을 통해 정량유압펌프의 가속인자로 압력을 설정하고 압력파형의 적용을 현장조건을 재현할 수 있도록 한 것은 향후 유압펌프 수명특성시험에 유용한 정보로 활용될 수 있다. A metering hydraulic pump driven by an electric motor transfers the flow of the pump to the mixing unit. This study adopted a no-failure life test method to calculate the test time of a metering pump. In addition, an accelerated life test method that applies the acceleration factor of the test method, which was set to pressure, was used to reduce the test time. A statistical analysis of reliability test data indicated that the shape parameter of the Weibull distribution was similar before and after the hydraulic pump was improved, and both the characteristic life and B5 life were extended after this improvement. Determining the acceleration factor as the pressure applying the pressure wave adopting the field operating condition through the acceleration test method was deemed a useful method to test the durability of the hydraulic pump for use in many applications.
최종식(Jong Sik Choi),이기천(Gi Chun Lee),최병오(Byung Oh Choi),전준완(Jun Wan Jeon),장무성,서재영(Chae Young Suh) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Polyurethane foaming machine metering pump has been used in the field of polyurethane. Polyurethane is used for manufacturing the urethane products mixed by a constant ratio with polyol and isocyanate, which are raw materials of urethane. Polyurethane foaming machine metering pump used in manufacturing the urethane can be divided by low pressure and high pressure mixing methods according to mixing methods. This study found out the lifetime characteristics of the polyurethane foaming machine metering pump before and after the durability tests.
최종식(Jong Sik Choi),최병오(Byung Oh Choi),이기천(Gi Chun Lee),전준완(Jun Wan Jeon),이기욱(ki-wook Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
A polyurethane foaming machine metering pump is the piston pump delivering the polyurethane to the foaming machine. The role of the metering pumps is an essential component to produce the good quality products with constant flow and no variation because the polyurethane should be mixed with polyol and isocyanate at the same rate. The metering pumps used in the facility of the previous polyurethane products company have used metering pumps made in Germany and England. The life of the pumps imported was 3 years(8,760 hours : 8 hours×365 days×3 years). However, it was difficult to substitute and expand the market of the metering pump because the metering pump made in abroad is 2 times more life than the domestic pump whose life is 1.5 years. This study had tested the performance and life test to analyze the characteristic of the metering pump to develop the better performance than abroad products.