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- 주제어 : 휠로더(Wheel Loader) (검색결과 73 건)
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진기창(Kichang Jin),박태호(Taeho Park),이형철(Hyeongcheol Lee),이종찬(Jongchang Lee),오창은 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
A wheel loader is frequently used in the construction site for uploading materials into trucks. Recently, the longitudinal wheel loader model is needed to analyze fuel consumption, fuel emission, and dynamics of wheel loader. Although a number of researches have focused on each component such as transmission, torque converter, and bucket, few researches have been done on the longitudinal wheel loader model. In this research, the wheel loader is analytically modeled and programmed by AMESim. The developed model contains engine, torque converter, transmission, differential, wheel, vehicle and external digging force. The longitudinal wheel loader model is validated by comparing the simulation results with the measured experimental results under the V-loading cycle. Therefore, the developed model well represents the actual basic function of each component and the power flow of the wheel loader.
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휠로더의 작업장치 링크 특성 분석을 통한 수평 인양 최적화
박현규(Hyun Gyu Park),장진석(Jin Seok Jang),유완석(Wan Suk Yoo),김민석(Min Seok Kim),이희종(Hee Jong Lee) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.4
휠로더는 건설 현장뿐만 아니라 운반, 제조업에도 다양한 용도로 범용적으로 활용된다. 따라서 작업장치 기본 설계 시에는 작업성능뿐만 아니라 버켓의 각도변화 등 작업사양을 만족시키는 설계 안을 도출 해야 한다. 본 연구에서는 다물체 동역학 해석을 통하여 휠로더 작업장치 특성 분석 프로그램을 개발하여 작업장치 기본설계 시 활용할 수 있도록 하였다. 또한 본 프로그램과 최적설계 프로그램의 연동을 통해서 Z-bar 타입 휠로더 작업장치의 작업사양을 개선하였다. 개발된 프로그램을 활용하여 작업장치 설계 시 작업장치 컨셉에 따른 기본설계방안을 도출하는데 소요되는 시간을 절감할 수 있을 것이다. Wheel loaders are utilized not only on construction sites, but also for general purposes, such as manufacturing and transportation. Therefore, during the basic design stage of this type of working device equipment, the designer should consider specifications as well as working performance. In this research, a characteristic analysis program was developed for use in the basic design stage of construction equipment using multibody dynamics analysis. In addition, through the optimization of its links, improvements to the lifting capability of a Z-bar-linkage-type wheel loader were suggested. Using the developed program and process, it is possible to reduce the time required for the basic design of the working device.
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주행 및 작업성능 통합 시뮬레이션을 위한 휠로더 동역학 모델의 개발
오광석(Kwangseok Oh),김학구(Hakgoo Kim),윤승재(Seungjae Yun),고경은(Kyungeun Ko),김판영(Panyoung Kim),이경수(Kyongsu Yi) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper presents a 3D dynamic simulation model of a wheel loader. The objective of development of the wheel loader dynamic simulation model is to test the performance of the Wheel loader under both working and driving conditions by simulation. The wheel loader dynamic simulation model consists of 3 parts: Vehicle powertrain module, Hydraulic module for working and steering, and Vehicle dynamic module. Vehicle powertrain module consists of engine, torque converter and transmission, and Hydraulic module consists of pump, valve, cylinder and attachments. 3D dynamic simulation module is based on vehicle dynamics and multi-body (front and rear bodies) dynamic analysis method. Front and rear bodies are connected by pin in the center of steering system. Action/reaction forces and moments applied to the pin are calculated by solving front/rear dynamic simultaneous equations. Forces and moments at the pin are considered to analyze how they have an effect on the dynamics of wheel loader. The wheel loader dynamic simulation model is verified through real measurement, and it is shown that proposed dynamic simulation model can represent actual dynamics of wheel loader.
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박준용(Junyong Pak),유완석(Wansuk Yoo),김희원(Heuiwon Kim),홍제민(Jemin Hong),고경은(Kyoungeun Ko) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
This paper presents a three dimensional modeling and simulations of operation and running of a wheel loader using the ADAMS program. A wheel loader consists of a bucket, a boom, a crank, a front frame, a rear frame, a bucket cylinder, two boom cylinders, two steering cylinders, nine spherical joints, six universal joints, five translation joints, three inline joints, a revolute and a fixed joint. Judging from the actual degrees of freedom of the wheel loader, proper kinematic joints are selected to exclude redundant constraints in the modeling. Through the running simulation over a bump with the three dimensional modeling, the joint reaction forces are calculated.
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정규홍(Gyuhong Jung),신상호(SangHo Shin),이승일(SeungIll Lee),김형준(HyungJun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A wheel loader is a type of wheeled tractor that is used mainly for uploading materials into trucks. Recently automatic transmissions for wheel loader become popular to help the driver get the repetitive work done easily and efficiently. Although domestic construction equipment manufacturing companies have produced various kinds of wheel loader, none of them have their own original automatic transmission model yet. The transmission control algorithm implemented on TCU considered to be a key part in view of development stage since it requires rigorous understanding for the transmission dynamics as well as the extended experience. In this research, TCU analyzer, which can extract the shifting behavior information of the commercial TCU, was designed in order to analyze the control algorithm.
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고경은(Kyung-Eun Ko),김희원(Heui-Won Kim),유완석(Wan-Suk Yoo) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In order to predict the dynamic behaviors of the wheel loader during the traveling on the road with the bump, the analytical model of the wheel loader was built up and the vehicle dynamic analysis was carried out using ADAMS program. And the dynamic behaviors of the traveling wheel loader were measured to verify the validity of the vehicle dynamic analysis procedure. The acceleration peaks of the cabin were found in both analysis and measurement results when the wheel loader was passing over the bump and the calculated dynamic behaviors showed good agreement with the measured ones. Therefore it was concluded that the vehicle dynamic analysis procedure established in this paper was valid.
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VPD 프로세스를 적용한 휠로더의 동역학 및 내구 해석
최성근(Sungkun Choi),박흥근(Heungkeun Park),장한기(Hankee Jang),명성식(Seongshik Myeong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper presents a dynamic and durability analysis of wheel loader using VPD process. In order to predict the dynamic behaviors of the wheel loader during the driving on the road with the bump, the analytical model of wheel loader was built up and the vehicle dynamic analysis was carried out using MSC.ADAMS/Car program. To Verifying the analysis results with experimental data, vertical acceleration of front axle and rear axle/frame were measured. Also, wheel loader was carried out fatigue analysis. From the analysis process, effective analysis method of wheel loader are proposed.
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내구선도를 이용한 휠 로더 전, 후 차축 피로파손에 관한 연구
이재학(Jai Hak Lee),유대원(Dae Won Yoo) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.4
휠 로더는 다양한 작업이 가능한 건설장비 중의 하나로서 기능적 다양성과 구조적 신뢰성 향상의 요구가 증대되고 있다. 휠 로더용 전, 후 차축은 대부분 해외로부터 수입하고 있는 실정이다. 본 논문은 피로 시험 결과와 각 내구선도를 통해 피로 수명을 평가하였다. FEM 해석결과 최대용력은 전 차축 100 ㎫, 후 차축 160 ㎫로 각각 피로 한계 응력 180 ㎫ 보다 작게 나타났다. 또한 피로 시험에서 1,000,000사이클을 만족하였다. 개선 전 피로 파손의 가장 큰 원인은 단면의 급격한 변화에 따른 큰 응력의 차이로 판단된다. Wheel loader is one of the construction machinery capable of variety of tasks and the demand on functional diversity and structural reliability is growing. Most of the front and rear axles for wheel loaders are currently imported from overseas. This paper assessed the fatigue life through each endurance curve with fatigue test results. FEM results showed that the front and rear axles have maximum stresses of 100 ㎫ and 160 ㎫, respectively which don't exceed fatigue limit stress of 180 ㎫. Also, fatigue tests were satisfactory up to 1,000,000 cycles. The biggest cause for the fatigue failure before improvement seems to be a great stress difference caused by a rapid change in the cross section.
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