• 유공압시스템학회논문집
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• 제4권4호
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• pp.21-27
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• 2007

A hydraulic breaker for construction machinery generally used for the destroying and disassembling of buildings, crashing road pavement, breaking rocks at quarry and so on. So the measurement of the impact energy of a hydraulic breaker is very important thing to prove its capability to manufacturers and customers. Therefore the prediction of impact energy in design process is very helpful to the most of breaker manufacturers. In this study, we carried on modeling and simulation of a hydraulic breaker to predict impact energy via commercial CAE software. The modeling and simulation of a hydraulic breaker was achieved with two parts. One is a hydraulic circuit analysis part via AMESim and the other is impact strain analysis part via ANSYS.

• 연구논문집
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• 통권32호
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• pp.45-53
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• 2002

Hydraulic breaker attached excavator generally used for the destroying and disassembling of buildings, crashing road pavement, breaking rocks at quarry and etc. The developed breaker are determined their own destructive force and number of impact by the input hydraulic flow rate and pressure than the operating conditions, In this study, the characteristics of pressure variation in closed vessel is invested for testing the impact energy of hydraulic breaker. To test the impact energy, the test system is designed as a mechanism consisted with a hydraulic cylinder, main base, pressure sensor, LVDT, data acquisition system and etc.. The developed test system is applied to measure the impact energy for hydraulic breaker. The proposed testing method could be applied for conventional impact test and the control system evaluation for hydraulic breakers.

• 한국산학기술학회논문지
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• 제16권5호
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• pp.3081-3086
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• 2015

100톤급 굴삭기에 장착할 수 있는 초대형 유압브레이커 개발을 수행하였다. 유압브레이커 설계에 앞서 타격에너지, 분당 타격수 등의 성능을 예측할 수 있는 유압브레이커 해석 방법에 대해 연구하였다. 해석 결과를 바탕으로 초대형 유압브레이커의 설계 및 제작이 이루어졌으며, 유압브레이커가 성공적으로 작동함을 확인하였다. 실제 유압브레이커 작동 시 타격에너지와 분당 타격수를 측정하여, 해석 결과와 비교하였다. 분당 타격수 해석 결과는 큰 오차 없이 실험 결과를 잘 예측하였지만, 타격에너지 해석 결과는 실제 실험 결과와 매우 큰 차이가 나타남을 확인하였다. 초대형 유압브레이커를 성공적으로 개발하였으며, 향후 마찰, 유압회로 등을 고려하여 타격에너지 해석 방법을 보완할 예정이다.

• 한국정밀공학회지
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• 제17권4호
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• pp.189-196
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• 2000

In this study, the hydraulic breaker system was analyzed and the analysis tool using GUI was developed. The analysis on the system with the accumulator was included. from the parametric analysis, the effects of each factor were revealed. Through the simulation with varying parameters, the method to improve the performance of the hydraulic breaker system was presented. The analysis tool will help a man without special knowledge about programming analyzse the hydraulic breaker system. The result of this study will help improve the hydraulic breaker system in sight of "Blow energy" and "Blows per minute".ws per minute".uot;.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.365-366
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• 2006

Hydraulic circuit breaker is the most popular type of electric power circuit breaker because of its superiority of operating performance and capacity. For the improvement of hydraulic circuit breaker's operating performance, it is very important to analyze its dynamic behavior characteristics. In this study, hydraulic circuit is modeled, analyzed and experimented. As a result, the experimental data agree well with the numerical ones, and the numerical results can be applied to the design and the improvement of hydraulic electric power circuit breaker.

• 한국정밀공학회지
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• 제23권11호
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• pp.108-115
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• 2006

A hydraulic breaker is widely utilized for many civil engineering areas for the purpose of destroying objects such as rocks, concrete, or road. However, since the high-level noise and vibration by a hydraulic breaker is one of the major sources of environmental noise and recently the environmental regulations on construction equipments are also getting more strengthened, in order to solve such problems, it is certainly necessary to design and develop a hydraulic breaker with low noise and low vibration. This research is to understand the noise characteristics through the noise test and acoustic analysis of the bracket housing in a hydraulic breaker and to identify the element part to be modified based on the result of the element contribution analysis. An improved breaker model including X-typed rib shows the result of low-noise level within target frequency band compared with a commercial breaker model.

• 한국소음진동공학회논문집
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• 제11권5호
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• pp.148-155
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• 2001

Hydraulic breaker is currently used for many civil engineering areas owing to the ease of changing the tooling mechanism. However, due to a high noise level, it has been one of notorious sources of environmental noise and the prevailing environmental concerns force the manufacturers to reduce the radiated noise levee during operations. To comply with such concerns, the present study is focused on designing and developing a low-noise hydraulic breaker For this purpose, sound sources are identified and relative contributions are rated. Acoustic enclosure. sealing systems, and low-nolle type chisel have been developed and applied to the actual machine. As a result, the radiated noise from the developed low-noose hydraulic breaker is reduced more than 13 dB(A) In comparison with the conventional hydraulic bleaker.

• Tribology and Lubricants
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• 제19권2호
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• pp.59-64
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• 2003

In this study, the hydraulic breaker system was analyzed and the analysis tool using GUI was developed. The analysis on the system with the accumulator was included. From the parametric analysis, the effects of each factor were revealed. Through the simulation with varying parameters, the method to improve the performance of the hydraulic breaker system was presented. The analysis tool will help a man without special knowledge about programming analyze the hydraulic breaker system. The result of this study will help improve the hydraulic breaker system in sight of Blow energy and Blows per minute.

• 한국소음진동공학회논문집
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• 제20권2호
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• pp.138-143
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• 2010

Hydraulic breakers are widely used for mining and construction engineering area but make serious noise problem. The noise is generated between a chisel and a piston when they are hit by a fluid power. This study proposed noise reduction method by the change of a chisel in a hydraulic breaker. In the new design, a different material is inserted inside of a chisel. The proposed design is analyzed and simulated by the use of a numerical method. A chisel by the new design was installed in a hydraulic breaker and experimented for sound pressure level. As a result, the noise of hydraulic breaker can be reduced more than 4 dB by simply changing a chisel.

• 대한기계학회논문집A
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• 제35권6호
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• pp.677-682
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• 2011

본 연구에서는 유압브레이커의 시뮬레이션 결과와 실제 실험 결과의 비교를 통해 시뮬레이션의 타당성을 검증하였다. 유압브레이커의 성능 향상을 위하여 비교적 설계 변경이 용이한 부품의 제원을 설계인자로 선정하였고, 요인시험과 회귀분석을 이용하여 각각의 설계 인자가 유압브레이커의 성능에 미치는 영향을 규명하였다. 본 연구의 결과로 기존 유압브레이커의 성능을 최대화 시킬 수 있는 방안을 제시하였다.